diff options
Diffstat (limited to 'packages/contracts/src/2.0.0')
63 files changed, 7750 insertions, 0 deletions
diff --git a/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol b/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol new file mode 100644 index 000000000..79fd92029 --- /dev/null +++ b/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol @@ -0,0 +1,365 @@ +pragma solidity ^0.4.10; + +/// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution. +/// @author Stefan George - <stefan.george@consensys.net> +contract MultiSigWallet { + + uint constant public MAX_OWNER_COUNT = 50; + + event Confirmation(address indexed sender, uint indexed transactionId); + event Revocation(address indexed sender, uint indexed transactionId); + event Submission(uint indexed transactionId); + event Execution(uint indexed transactionId); + event ExecutionFailure(uint indexed transactionId); + event Deposit(address indexed sender, uint value); + event OwnerAddition(address indexed owner); + event OwnerRemoval(address indexed owner); + event RequirementChange(uint required); + + mapping (uint => Transaction) public transactions; + mapping (uint => mapping (address => bool)) public confirmations; + mapping (address => bool) public isOwner; + address[] public owners; + uint public required; + uint public transactionCount; + + struct Transaction { + address destination; + uint value; + bytes data; + bool executed; + } + + modifier onlyWallet() { + if (msg.sender != address(this)) + throw; + _; + } + + modifier ownerDoesNotExist(address owner) { + if (isOwner[owner]) + throw; + _; + } + + modifier ownerExists(address owner) { + if (!isOwner[owner]) + throw; + _; + } + + modifier transactionExists(uint transactionId) { + if (transactions[transactionId].destination == 0) + throw; + _; + } + + modifier confirmed(uint transactionId, address owner) { + if (!confirmations[transactionId][owner]) + throw; + _; + } + + modifier notConfirmed(uint transactionId, address owner) { + if (confirmations[transactionId][owner]) + throw; + _; + } + + modifier notExecuted(uint transactionId) { + if (transactions[transactionId].executed) + throw; + _; + } + + modifier notNull(address _address) { + if (_address == 0) + throw; + _; + } + + modifier validRequirement(uint ownerCount, uint _required) { + if ( ownerCount > MAX_OWNER_COUNT + || _required > ownerCount + || _required == 0 + || ownerCount == 0) + throw; + _; + } + + /// @dev Fallback function allows to deposit ether. + function() + payable + { + if (msg.value > 0) + Deposit(msg.sender, msg.value); + } + + /* + * Public functions + */ + /// @dev Contract constructor sets initial owners and required number of confirmations. + /// @param _owners List of initial owners. + /// @param _required Number of required confirmations. + function MultiSigWallet(address[] _owners, uint _required) + public + validRequirement(_owners.length, _required) + { + for (uint i=0; i<_owners.length; i++) { + if (isOwner[_owners[i]] || _owners[i] == 0) + throw; + isOwner[_owners[i]] = true; + } + owners = _owners; + required = _required; + } + + /// @dev Allows to add a new owner. Transaction has to be sent by wallet. + /// @param owner Address of new owner. + function addOwner(address owner) + public + onlyWallet + ownerDoesNotExist(owner) + notNull(owner) + validRequirement(owners.length + 1, required) + { + isOwner[owner] = true; + owners.push(owner); + OwnerAddition(owner); + } + + /// @dev Allows to remove an owner. Transaction has to be sent by wallet. + /// @param owner Address of owner. + function removeOwner(address owner) + public + onlyWallet + ownerExists(owner) + { + isOwner[owner] = false; + for (uint i=0; i<owners.length - 1; i++) + if (owners[i] == owner) { + owners[i] = owners[owners.length - 1]; + break; + } + owners.length -= 1; + if (required > owners.length) + changeRequirement(owners.length); + OwnerRemoval(owner); + } + + /// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet. + /// @param owner Address of owner to be replaced. + /// @param owner Address of new owner. + function replaceOwner(address owner, address newOwner) + public + onlyWallet + ownerExists(owner) + ownerDoesNotExist(newOwner) + { + for (uint i=0; i<owners.length; i++) + if (owners[i] == owner) { + owners[i] = newOwner; + break; + } + isOwner[owner] = false; + isOwner[newOwner] = true; + OwnerRemoval(owner); + OwnerAddition(newOwner); + } + + /// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet. + /// @param _required Number of required confirmations. + function changeRequirement(uint _required) + public + onlyWallet + validRequirement(owners.length, _required) + { + required = _required; + RequirementChange(_required); + } + + /// @dev Allows an owner to submit and confirm a transaction. + /// @param destination Transaction target address. + /// @param value Transaction ether value. + /// @param data Transaction data payload. + /// @return Returns transaction ID. + function submitTransaction(address destination, uint value, bytes data) + public + returns (uint transactionId) + { + transactionId = addTransaction(destination, value, data); + confirmTransaction(transactionId); + } + + /// @dev Allows an owner to confirm a transaction. + /// @param transactionId Transaction ID. + function confirmTransaction(uint transactionId) + public + ownerExists(msg.sender) + transactionExists(transactionId) + notConfirmed(transactionId, msg.sender) + { + confirmations[transactionId][msg.sender] = true; + Confirmation(msg.sender, transactionId); + executeTransaction(transactionId); + } + + /// @dev Allows an owner to revoke a confirmation for a transaction. + /// @param transactionId Transaction ID. + function revokeConfirmation(uint transactionId) + public + ownerExists(msg.sender) + confirmed(transactionId, msg.sender) + notExecuted(transactionId) + { + confirmations[transactionId][msg.sender] = false; + Revocation(msg.sender, transactionId); + } + + /// @dev Allows anyone to execute a confirmed transaction. + /// @param transactionId Transaction ID. + function executeTransaction(uint transactionId) + public + notExecuted(transactionId) + { + if (isConfirmed(transactionId)) { + Transaction tx = transactions[transactionId]; + tx.executed = true; + if (tx.destination.call.value(tx.value)(tx.data)) + Execution(transactionId); + else { + ExecutionFailure(transactionId); + tx.executed = false; + } + } + } + + /// @dev Returns the confirmation status of a transaction. + /// @param transactionId Transaction ID. + /// @return Confirmation status. + function isConfirmed(uint transactionId) + public + constant + returns (bool) + { + uint count = 0; + for (uint i=0; i<owners.length; i++) { + if (confirmations[transactionId][owners[i]]) + count += 1; + if (count == required) + return true; + } + } + + /* + * Internal functions + */ + /// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet. + /// @param destination Transaction target address. + /// @param value Transaction ether value. + /// @param data Transaction data payload. + /// @return Returns transaction ID. + function addTransaction(address destination, uint value, bytes data) + internal + notNull(destination) + returns (uint transactionId) + { + transactionId = transactionCount; + transactions[transactionId] = Transaction({ + destination: destination, + value: value, + data: data, + executed: false + }); + transactionCount += 1; + Submission(transactionId); + } + + /* + * Web3 call functions + */ + /// @dev Returns number of confirmations of a transaction. + /// @param transactionId Transaction ID. + /// @return Number of confirmations. + function getConfirmationCount(uint transactionId) + public + constant + returns (uint count) + { + for (uint i=0; i<owners.length; i++) + if (confirmations[transactionId][owners[i]]) + count += 1; + } + + /// @dev Returns total number of transactions after filers are applied. + /// @param pending Include pending transactions. + /// @param executed Include executed transactions. + /// @return Total number of transactions after filters are applied. + function getTransactionCount(bool pending, bool executed) + public + constant + returns (uint count) + { + for (uint i=0; i<transactionCount; i++) + if ( pending && !transactions[i].executed + || executed && transactions[i].executed) + count += 1; + } + + /// @dev Returns list of owners. + /// @return List of owner addresses. + function getOwners() + public + constant + returns (address[]) + { + return owners; + } + + /// @dev Returns array with owner addresses, which confirmed transaction. + /// @param transactionId Transaction ID. + /// @return Returns array of owner addresses. + function getConfirmations(uint transactionId) + public + constant + returns (address[] _confirmations) + { + address[] memory confirmationsTemp = new address[](owners.length); + uint count = 0; + uint i; + for (i=0; i<owners.length; i++) + if (confirmations[transactionId][owners[i]]) { + confirmationsTemp[count] = owners[i]; + count += 1; + } + _confirmations = new address[](count); + for (i=0; i<count; i++) + _confirmations[i] = confirmationsTemp[i]; + } + + /// @dev Returns list of transaction IDs in defined range. + /// @param from Index start position of transaction array. + /// @param to Index end position of transaction array. + /// @param pending Include pending transactions. + /// @param executed Include executed transactions. + /// @return Returns array of transaction IDs. + function getTransactionIds(uint from, uint to, bool pending, bool executed) + public + constant + returns (uint[] _transactionIds) + { + uint[] memory transactionIdsTemp = new uint[](transactionCount); + uint count = 0; + uint i; + for (i=0; i<transactionCount; i++) + if ( pending && !transactions[i].executed + || executed && transactions[i].executed) + { + transactionIdsTemp[count] = i; + count += 1; + } + _transactionIds = new uint[](to - from); + for (i=from; i<to; i++) + _transactionIds[i - from] = transactionIdsTemp[i]; + } +} diff --git a/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol b/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol new file mode 100644 index 000000000..9766c2158 --- /dev/null +++ b/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol @@ -0,0 +1,132 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.10; + +import "./MultiSigWallet.sol"; + +/// @title Multisignature wallet with time lock- Allows multiple parties to execute a transaction after a time lock has passed. +/// @author Amir Bandeali - <amir@0xProject.com> +contract MultiSigWalletWithTimeLock is MultiSigWallet { + + event ConfirmationTimeSet(uint indexed transactionId, uint confirmationTime); + event TimeLockChange(uint secondsTimeLocked); + + uint public secondsTimeLocked; + + mapping (uint => uint) public confirmationTimes; + + modifier notFullyConfirmed(uint transactionId) { + require(!isConfirmed(transactionId)); + _; + } + + modifier fullyConfirmed(uint transactionId) { + require(isConfirmed(transactionId)); + _; + } + + modifier pastTimeLock(uint transactionId) { + require(block.timestamp >= confirmationTimes[transactionId] + secondsTimeLocked); + _; + } + + /* + * Public functions + */ + + /// @dev Contract constructor sets initial owners, required number of confirmations, and time lock. + /// @param _owners List of initial owners. + /// @param _required Number of required confirmations. + /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds. + function MultiSigWalletWithTimeLock(address[] _owners, uint _required, uint _secondsTimeLocked) + public + MultiSigWallet(_owners, _required) + { + secondsTimeLocked = _secondsTimeLocked; + } + + /// @dev Changes the duration of the time lock for transactions. + /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds. + function changeTimeLock(uint _secondsTimeLocked) + public + onlyWallet + { + secondsTimeLocked = _secondsTimeLocked; + TimeLockChange(_secondsTimeLocked); + } + + /// @dev Allows an owner to confirm a transaction. + /// @param transactionId Transaction ID. + function confirmTransaction(uint transactionId) + public + ownerExists(msg.sender) + transactionExists(transactionId) + notConfirmed(transactionId, msg.sender) + notFullyConfirmed(transactionId) + { + confirmations[transactionId][msg.sender] = true; + Confirmation(msg.sender, transactionId); + if (isConfirmed(transactionId)) { + setConfirmationTime(transactionId, block.timestamp); + } + } + + /// @dev Allows an owner to revoke a confirmation for a transaction. + /// @param transactionId Transaction ID. + function revokeConfirmation(uint transactionId) + public + ownerExists(msg.sender) + confirmed(transactionId, msg.sender) + notExecuted(transactionId) + notFullyConfirmed(transactionId) + { + confirmations[transactionId][msg.sender] = false; + Revocation(msg.sender, transactionId); + } + + /// @dev Allows anyone to execute a confirmed transaction. + /// @param transactionId Transaction ID. + function executeTransaction(uint transactionId) + public + notExecuted(transactionId) + fullyConfirmed(transactionId) + pastTimeLock(transactionId) + { + Transaction storage tx = transactions[transactionId]; + tx.executed = true; + if (tx.destination.call.value(tx.value)(tx.data)) + Execution(transactionId); + else { + ExecutionFailure(transactionId); + tx.executed = false; + } + } + + /* + * Internal functions + */ + + /// @dev Sets the time of when a submission first passed. + function setConfirmationTime(uint transactionId, uint confirmationTime) + internal + { + confirmationTimes[transactionId] = confirmationTime; + ConfirmationTimeSet(transactionId, confirmationTime); + } +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol new file mode 100644 index 000000000..aed62f54f --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol @@ -0,0 +1,132 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../utils/LibBytes/LibBytes.sol"; +import "./MixinAuthorizable.sol"; + +contract ERC20Proxy is + MixinAuthorizable +{ + // Id of this proxy. + bytes4 constant PROXY_ID = bytes4(keccak256("ERC20Token(address)")); + + function () + external + { + assembly { + // The first 4 bytes of calldata holds the function selector + let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000) + + // `transferFrom` will be called with the following parameters: + // assetData Encoded byte array. + // from Address to transfer asset from. + // to Address to transfer asset to. + // amount Amount of asset to transfer. + // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4 + if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) { + + // To lookup a value in a mapping, we load from the storage location keccak256(k, p), + // where k is the key left padded to 32 bytes and p is the storage slot + let start := mload(64) + mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff)) + mstore(add(start, 32), authorized_slot) + + // Revert if authorized[msg.sender] == false + if iszero(sload(keccak256(start, 64))) { + // Revert with `Error("SENDER_NOT_AUTHORIZED")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000) + mstore(96, 0) + revert(0, 100) + } + + /////// Token contract address /////// + // The token address is found as follows: + // * It is stored at offset 4 in `assetData` contents. + // * This is stored at offset 32 from `assetData`. + // * The offset to `assetData` from Params is stored at offset + // 4 in calldata. + // * The offset of Params in calldata is 4. + // So we read location 4 and add 32 + 4 + 4 to it. + let token := calldataload(add(calldataload(4), 40)) + + /////// Setup Header Area /////// + // This area holds the 4-byte `transferFrom` selector. + // Any trailing data in transferFromSelector will be + // overwritten in the next `mstore` call. + mstore(0, 0x23b872dd00000000000000000000000000000000000000000000000000000000) + + /////// Setup Params Area /////// + // We copy the fields `from`, `to` and `amount` in bulk + // from our own calldata to the new calldata. + calldatacopy(4, 36, 96) + + /////// Call `token.transferFrom` using the calldata /////// + let success := call( + gas, // forward all gas + token, // call address of token contract + 0, // don't send any ETH + 0, // pointer to start of input + 100, // length of input + 0, // write output over input + 32 // output size should be 32 bytes + ) + + /////// Check return data. /////// + // If there is no return data, we assume the token incorrectly + // does not return a bool. In this case we expect it to revert + // on failure, which was handled above. + // If the token does return data, we require that it is a single + // nonzero 32 bytes value. + // So the transfer succeeded if the call succeeded and either + // returned nothing, or returned a non-zero 32 byte value. + success := and(success, or( + iszero(returndatasize), + and( + eq(returndatasize, 32), + gt(mload(0), 0) + ) + )) + if success { + return(0, 0) + } + + // Revert with `Error("TRANSFER_FAILED")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000) + mstore(96, 0) + revert(0, 100) + } + } + } + + /// @dev Gets the proxy id associated with the proxy address. + /// @return Proxy id. + function getProxyId() + external + pure + returns (bytes4) + { + return PROXY_ID; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol new file mode 100644 index 000000000..b73dc36cc --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol @@ -0,0 +1,218 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../utils/LibBytes/LibBytes.sol"; +import "./MixinAuthorizable.sol"; + +contract ERC721Proxy is + MixinAuthorizable +{ + // Id of this proxy. + bytes4 constant PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)")); + + function () + external + { + assembly { + // The first 4 bytes of calldata holds the function selector + let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000) + + // `transferFrom` will be called with the following parameters: + // assetData Encoded byte array. + // from Address to transfer asset from. + // to Address to transfer asset to. + // amount Amount of asset to transfer. + // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4 + if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) { + + // To lookup a value in a mapping, we load from the storage location keccak256(k, p), + // where k is the key left padded to 32 bytes and p is the storage slot + let start := mload(64) + mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff)) + mstore(add(start, 32), authorized_slot) + + // Revert if authorized[msg.sender] == false + if iszero(sload(keccak256(start, 64))) { + // Revert with `Error("SENDER_NOT_AUTHORIZED")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000) + mstore(96, 0) + revert(0, 100) + } + + // `transferFrom`. + // The function is marked `external`, so no abi decodeding is done for + // us. Instead, we expect the `calldata` memory to contain the + // following: + // + // | Area | Offset | Length | Contents | + // |----------|--------|---------|-------------------------------------| + // | Header | 0 | 4 | function selector | + // | Params | | 4 * 32 | function parameters: | + // | | 4 | | 1. offset to assetData (*) | + // | | 36 | | 2. from | + // | | 68 | | 3. to | + // | | 100 | | 4. amount | + // | Data | | | assetData: | + // | | 132 | 32 | assetData Length | + // | | 164 | ** | assetData Contents | + // + // (*): offset is computed from start of function parameters, so offset + // by an additional 4 bytes in the calldata. + // + // WARNING: The ABIv2 specification allows additional padding between + // the Params and Data section. This will result in a larger + // offset to assetData. + + // Asset data itself is encoded as follows: + // + // | Area | Offset | Length | Contents | + // |----------|--------|---------|-------------------------------------| + // | Header | 0 | 4 | function selector | + // | Params | | 3 * 32 | function parameters: | + // | | 4 | 12 + 20 | 1. token address | + // | | 36 | | 2. tokenId | + // | | 68 | | 3. offset to receiverData (*) | + // | Data | | | receiverData: | + // | | 100 | 32 | receiverData Length | + // | | 132 | ** | receiverData Contents | + + // We construct calldata for the `token.safeTransferFrom` ABI. + // The layout of this calldata is in the table below. + // + // | Area | Offset | Length | Contents | + // |----------|--------|---------|-------------------------------------| + // | Header | 0 | 4 | function selector | + // | Params | | 4 * 32 | function parameters: | + // | | 4 | | 1. from | + // | | 36 | | 2. to | + // | | 68 | | 3. tokenId | + // | | 100 | | 4. offset to receiverData (*) | + // | Data | | | receiverData: | + // | | 132 | 32 | receiverData Length | + // | | 164 | ** | receiverData Contents | + + // There exists only 1 of each token. + // require(amount == 1, "INVALID_AMOUNT") + if sub(calldataload(100), 1) { + // Revert with `Error("INVALID_AMOUNT")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000000e494e56414c49445f414d4f554e540000000000000000000000000000) + mstore(96, 0) + revert(0, 100) + } + + // Require assetData to be at least 132 bytes + let offset := calldataload(4) + if lt(calldataload(add(offset, 4)), 132) { + // Revert with `Error("LENGTH_GREATER_THAN_131_REQUIRED")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x000000204c454e4754485f475245415445525f5448414e5f3133315f52455155) + mstore(96, 0x4952454400000000000000000000000000000000000000000000000000000000) + revert(0, 100) + } + + /////// Setup State /////// + // `cdStart` is the start of the calldata for + // `token.safeTransferFrom` (equal to free memory ptr). + let cdStart := mload(64) + // `dataAreaLength` is the total number of words + // needed to store `receiverData` + // As-per the ABI spec, this value is padded up to + // the nearest multiple of 32, + // and includes 32-bytes for length. + // It's calculated as folows: + // - Unpadded length in bytes = `mload(receiverData) + 32` + // - Add 31 to convert rounding down to rounding up. + // Combined with the previous and this is `63`. + // - Round down to nearest multiple of 32 by clearing + // bits 0x1F. This is done with `and` and a mask. + + /////// Setup Header Area /////// + // This area holds the 4-byte `transferFromSelector`. + // Any trailing data in transferFromSelector will be + // overwritten in the next `mstore` call. + mstore(cdStart, 0xb88d4fde00000000000000000000000000000000000000000000000000000000) + + /////// Setup Params Area /////// + // Each parameter is padded to 32-bytes. + // The entire Params Area is 128 bytes. + // Notes: + // 1. A 20-byte mask is applied to addresses + // to zero-out the unused bytes. + // 2. The offset to `receiverData` is the length + // of the Params Area (128 bytes). + + let length := calldataload(add(offset, 136)) + let token := calldataload(add(offset, 40)) + + // Round length up to multiple of 32 + length := and(add(length, 31), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0) + + // Copy `from` and `to` + calldatacopy(add(cdStart, 4), 36, 64) + + // TokenId + mstore(add(cdStart, 68), calldataload(add(offset, 72))) + + // Offset to receiverData + mstore(add(cdStart, 100), 128) + + // receiverData (including length) + calldatacopy(add(cdStart, 132), add(offset, 136), add(length, 32)) + + /////// Call `token.safeTransferFrom` using the calldata /////// + let success := call( + gas, // forward all gas + token, // call address of token contract + 0, // don't send any ETH + cdStart, // pointer to start of input + add(length, 164), // length of input + 0, // write output to null + 0 // output size is 0 bytes + ) + if success { + return(0, 0) + } + + // Revert with `Error("TRANSFER_FAILED")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000) + mstore(96, 0) + revert(0, 100) + } + } + } + + /// @dev Gets the proxy id associated with the proxy address. + /// @return Proxy id. + function getProxyId() + external + pure + returns (bytes4) + { + return PROXY_ID; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol new file mode 100644 index 000000000..3b9584a44 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol @@ -0,0 +1,118 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../utils/Ownable/Ownable.sol"; +import "./mixins/MAuthorizable.sol"; + +contract MixinAuthorizable is + Ownable, + MAuthorizable +{ + + /// @dev Only authorized addresses can invoke functions with this modifier. + modifier onlyAuthorized { + require( + authorized[msg.sender], + "SENDER_NOT_AUTHORIZED" + ); + _; + } + + mapping (address => bool) public authorized; + address[] public authorities; + + /// @dev Authorizes an address. + /// @param target Address to authorize. + function addAuthorizedAddress(address target) + external + onlyOwner + { + require( + !authorized[target], + "TARGET_ALREADY_AUTHORIZED" + ); + + authorized[target] = true; + authorities.push(target); + emit AuthorizedAddressAdded(target, msg.sender); + } + + /// @dev Removes authorizion of an address. + /// @param target Address to remove authorization from. + function removeAuthorizedAddress(address target) + external + onlyOwner + { + require( + authorized[target], + "TARGET_NOT_AUTHORIZED" + ); + + delete authorized[target]; + for (uint256 i = 0; i < authorities.length; i++) { + if (authorities[i] == target) { + authorities[i] = authorities[authorities.length - 1]; + authorities.length -= 1; + break; + } + } + emit AuthorizedAddressRemoved(target, msg.sender); + } + + /// @dev Removes authorizion of an address. + /// @param target Address to remove authorization from. + /// @param index Index of target in authorities array. + function removeAuthorizedAddressAtIndex( + address target, + uint256 index + ) + external + onlyOwner + { + require( + authorized[target], + "TARGET_NOT_AUTHORIZED" + ); + require( + index < authorities.length, + "INDEX_OUT_OF_BOUNDS" + ); + require( + authorities[index] == target, + "AUTHORIZED_ADDRESS_MISMATCH" + ); + + delete authorized[target]; + authorities[index] = authorities[authorities.length - 1]; + authorities.length -= 1; + emit AuthorizedAddressRemoved(target, msg.sender); + } + + /// @dev Gets all authorized addresses. + /// @return Array of authorized addresses. + function getAuthorizedAddresses() + external + view + returns (address[] memory) + { + return authorities; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol new file mode 100644 index 000000000..7ebd6acf0 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol @@ -0,0 +1,38 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.23; + +// @dev Interface of the asset proxy's assetData. +// The asset proxies take an ABI encoded `bytes assetData` as argument. +// This argument is ABI encoded as one of the methods of this interface. +interface IAssetData { + + function ERC20Token(address tokenContract) + external + pure; + + function ERC721Token( + address tokenContract, + uint256 tokenId, + bytes receiverData + ) + external + pure; + +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol new file mode 100644 index 000000000..eacd5a412 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol @@ -0,0 +1,47 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./IAuthorizable.sol"; + +contract IAssetProxy is + IAuthorizable +{ + + /// @dev Transfers assets. Either succeeds or throws. + /// @param assetData Byte array encoded for the respective asset proxy. + /// @param from Address to transfer asset from. + /// @param to Address to transfer asset to. + /// @param amount Amount of asset to transfer. + function transferFrom( + bytes assetData, + address from, + address to, + uint256 amount + ) + external; + + /// @dev Gets the proxy id associated with the proxy address. + /// @return Proxy id. + function getProxyId() + external + pure + returns (bytes4); +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol new file mode 100644 index 000000000..cedd1744c --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol @@ -0,0 +1,53 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../../utils/Ownable/IOwnable.sol"; + +contract IAuthorizable is + IOwnable +{ + + /// @dev Gets all authorized addresses. + /// @return Array of authorized addresses. + function getAuthorizedAddresses() + external + view + returns (address[]); + + /// @dev Authorizes an address. + /// @param target Address to authorize. + function addAuthorizedAddress(address target) + external; + + /// @dev Removes authorizion of an address. + /// @param target Address to remove authorization from. + function removeAuthorizedAddress(address target) + external; + + /// @dev Removes authorizion of an address. + /// @param target Address to remove authorization from. + /// @param index Index of target in authorities array. + function removeAuthorizedAddressAtIndex( + address target, + uint256 index + ) + external; +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol new file mode 100644 index 000000000..338cb12e2 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol @@ -0,0 +1,36 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +/// @dev This contract documents the revert reasons used in the AssetProxy contracts. +/// This contract is intended to serve as a reference, but is not actually used for efficiency reasons. +contract LibAssetProxyErrors { + + /// Authorizable errors /// + string constant SENDER_NOT_AUTHORIZED = "SENDER_NOT_AUTHORIZED"; // Sender not authorized to call this method. + string constant TARGET_NOT_AUTHORIZED = "TARGET_NOT_AUTHORIZED"; // Target address not authorized to call this method. + string constant TARGET_ALREADY_AUTHORIZED = "TARGET_ALREADY_AUTHORIZED"; // Target address must not already be authorized. + string constant INDEX_OUT_OF_BOUNDS = "INDEX_OUT_OF_BOUNDS"; // Specified array index is out of bounds. + string constant AUTHORIZED_ADDRESS_MISMATCH = "AUTHORIZED_ADDRESS_MISMATCH"; // Address at index does not match given target address. + + /// Transfer errors /// + string constant INVALID_AMOUNT = "INVALID_AMOUNT"; // Transfer amount must equal 1. + string constant TRANSFER_FAILED = "TRANSFER_FAILED"; // Transfer failed. + string constant LENGTH_GREATER_THAN_131_REQUIRED = "LENGTH_GREATER_THAN_131_REQUIRED"; // Byte array must have a length greater than 0. +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol new file mode 100644 index 000000000..6f35bd7ec --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol @@ -0,0 +1,42 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../interfaces/IAuthorizable.sol"; + +contract MAuthorizable is + IAuthorizable +{ + + // Event logged when a new address is authorized. + event AuthorizedAddressAdded( + address indexed target, + address indexed caller + ); + + // Event logged when a currently authorized address is unauthorized. + event AuthorizedAddressRemoved( + address indexed target, + address indexed caller + ); + + /// @dev Only authorized addresses can invoke functions with this modifier. + modifier onlyAuthorized { revert(); _; } +} diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol new file mode 100644 index 000000000..eb58b3374 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol @@ -0,0 +1,98 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.10; + +import "../../multisig/MultiSigWalletWithTimeLock.sol"; +import "../../utils/LibBytes/LibBytes.sol"; + +contract AssetProxyOwner is + MultiSigWalletWithTimeLock +{ + using LibBytes for bytes; + + event AssetProxyRegistration(address assetProxyContract, bool isRegistered); + + // Mapping of AssetProxy contract address => + // if this contract is allowed to call the AssetProxy's `removeAuthorizedAddressAtIndex` method without a time lock. + mapping (address => bool) public isAssetProxyRegistered; + + bytes4 constant REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR = bytes4(keccak256("removeAuthorizedAddressAtIndex(address,uint256)")); + + /// @dev Function will revert if the transaction does not call `removeAuthorizedAddressAtIndex` + /// on an approved AssetProxy contract. + modifier validRemoveAuthorizedAddressAtIndexTx(uint256 transactionId) { + Transaction storage tx = transactions[transactionId]; + require(isAssetProxyRegistered[tx.destination]); + require(tx.data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR); + _; + } + + /// @dev Contract constructor sets initial owners, required number of confirmations, + /// time lock, and list of AssetProxy addresses. + /// @param _owners List of initial owners. + /// @param _assetProxyContracts Array of AssetProxy contract addresses. + /// @param _required Number of required confirmations. + /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds. + function AssetProxyOwner( + address[] memory _owners, + address[] memory _assetProxyContracts, + uint256 _required, + uint256 _secondsTimeLocked + ) + public + MultiSigWalletWithTimeLock(_owners, _required, _secondsTimeLocked) + { + for (uint256 i = 0; i < _assetProxyContracts.length; i++) { + address assetProxy = _assetProxyContracts[i]; + require(assetProxy != address(0)); + isAssetProxyRegistered[assetProxy] = true; + } + } + + /// @dev Registers or deregisters an AssetProxy to be able to execute + /// `removeAuthorizedAddressAtIndex` without a timelock. + /// @param assetProxyContract Address of AssetProxy contract. + /// @param isRegistered Status of approval for AssetProxy contract. + function registerAssetProxy(address assetProxyContract, bool isRegistered) + public + onlyWallet + notNull(assetProxyContract) + { + isAssetProxyRegistered[assetProxyContract] = isRegistered; + AssetProxyRegistration(assetProxyContract, isRegistered); + } + + /// @dev Allows execution of `removeAuthorizedAddressAtIndex` without time lock. + /// @param transactionId Transaction ID. + function executeRemoveAuthorizedAddressAtIndex(uint256 transactionId) + public + notExecuted(transactionId) + fullyConfirmed(transactionId) + validRemoveAuthorizedAddressAtIndexTx(transactionId) + { + Transaction storage tx = transactions[transactionId]; + tx.executed = true; + if (tx.destination.call.value(tx.value)(tx.data)) + Execution(transactionId); + else { + ExecutionFailure(transactionId); + tx.executed = false; + } + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol b/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol new file mode 100644 index 000000000..d36e9633e --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol @@ -0,0 +1,52 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./libs/LibConstants.sol"; +import "./MixinExchangeCore.sol"; +import "./MixinSignatureValidator.sol"; +import "./MixinWrapperFunctions.sol"; +import "./MixinAssetProxyDispatcher.sol"; +import "./MixinTransactions.sol"; +import "./MixinMatchOrders.sol"; + +contract Exchange is + MixinExchangeCore, + MixinMatchOrders, + MixinSignatureValidator, + MixinTransactions, + MixinAssetProxyDispatcher, + MixinWrapperFunctions +{ + + string constant public VERSION = "2.0.1-alpha"; + + // Mixins are instantiated in the order they are inherited + constructor (bytes memory _zrxAssetData) + public + LibConstants(_zrxAssetData) // @TODO: Remove when we deploy. + MixinExchangeCore() + MixinMatchOrders() + MixinSignatureValidator() + MixinTransactions() + MixinAssetProxyDispatcher() + MixinWrapperFunctions() + {} +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol new file mode 100644 index 000000000..9e9d88ce7 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol @@ -0,0 +1,175 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../utils/Ownable/Ownable.sol"; +import "../../utils/LibBytes/LibBytes.sol"; +import "./mixins/MAssetProxyDispatcher.sol"; +import "../AssetProxy/interfaces/IAssetProxy.sol"; + +contract MixinAssetProxyDispatcher is + Ownable, + MAssetProxyDispatcher +{ + using LibBytes for bytes; + + // Mapping from Asset Proxy Id's to their respective Asset Proxy + mapping (bytes4 => IAssetProxy) public assetProxies; + + /// @dev Registers an asset proxy to its asset proxy id. + /// Once an asset proxy is registered, it cannot be unregistered. + /// @param assetProxy Address of new asset proxy to register. + function registerAssetProxy(address assetProxy) + external + onlyOwner + { + IAssetProxy assetProxyContract = IAssetProxy(assetProxy); + + // Ensure that no asset proxy exists with current id. + bytes4 assetProxyId = assetProxyContract.getProxyId(); + address currentAssetProxy = assetProxies[assetProxyId]; + require( + currentAssetProxy == address(0), + "ASSET_PROXY_ALREADY_EXISTS" + ); + + // Add asset proxy and log registration. + assetProxies[assetProxyId] = assetProxyContract; + emit AssetProxyRegistered( + assetProxyId, + assetProxy + ); + } + + /// @dev Gets an asset proxy. + /// @param assetProxyId Id of the asset proxy. + /// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered. + function getAssetProxy(bytes4 assetProxyId) + external + view + returns (address) + { + return assetProxies[assetProxyId]; + } + + /// @dev Forwards arguments to assetProxy and calls `transferFrom`. Either succeeds or throws. + /// @param assetData Byte array encoded for the asset. + /// @param from Address to transfer token from. + /// @param to Address to transfer token to. + /// @param amount Amount of token to transfer. + function dispatchTransferFrom( + bytes memory assetData, + address from, + address to, + uint256 amount + ) + internal + { + // Do nothing if no amount should be transferred. + if (amount > 0) { + // Ensure assetData length is valid + require( + assetData.length > 3, + "LENGTH_GREATER_THAN_3_REQUIRED" + ); + + // Lookup assetProxy + bytes4 assetProxyId; + assembly { + assetProxyId := and(mload( + add(assetData, 32)), + 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 + ) + } + address assetProxy = assetProxies[assetProxyId]; + + // Ensure that assetProxy exists + require( + assetProxy != address(0), + "ASSET_PROXY_DOES_NOT_EXIST" + ); + + // We construct calldata for the `assetProxy.transferFrom` ABI. + // The layout of this calldata is in the table below. + // + // | Area | Offset | Length | Contents | + // | -------- |--------|---------|-------------------------------------------- | + // | Header | 0 | 4 | function selector | + // | Params | | 4 * 32 | function parameters: | + // | | 4 | | 1. offset to assetData (*) | + // | | 36 | | 2. from | + // | | 68 | | 3. to | + // | | 100 | | 4. amount | + // | Data | | | assetData: | + // | | 132 | 32 | assetData Length | + // | | 164 | ** | assetData Contents | + + assembly { + /////// Setup State /////// + // `cdStart` is the start of the calldata for `assetProxy.transferFrom` (equal to free memory ptr). + let cdStart := mload(64) + // `dataAreaLength` is the total number of words needed to store `assetData` + // As-per the ABI spec, this value is padded up to the nearest multiple of 32, + // and includes 32-bytes for length. + let dataAreaLength := and(add(mload(assetData), 63), 0xFFFFFFFFFFFE0) + // `cdEnd` is the end of the calldata for `assetProxy.transferFrom`. + let cdEnd := add(cdStart, add(132, dataAreaLength)) + + + /////// Setup Header Area /////// + // This area holds the 4-byte `transferFromSelector`. + // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4 + mstore(cdStart, 0xa85e59e400000000000000000000000000000000000000000000000000000000) + + /////// Setup Params Area /////// + // Each parameter is padded to 32-bytes. The entire Params Area is 128 bytes. + // Notes: + // 1. The offset to `assetData` is the length of the Params Area (128 bytes). + // 2. A 20-byte mask is applied to addresses to zero-out the unused bytes. + mstore(add(cdStart, 4), 128) + mstore(add(cdStart, 36), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) + mstore(add(cdStart, 68), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) + mstore(add(cdStart, 100), amount) + + /////// Setup Data Area /////// + // This area holds `assetData`. + let dataArea := add(cdStart, 132) + for {} lt(dataArea, cdEnd) {} { + mstore(dataArea, mload(assetData)) + dataArea := add(dataArea, 32) + assetData := add(assetData, 32) + } + + /////// Call `assetProxy.transferFrom` using the constructed calldata /////// + let success := call( + gas, // forward all gas + assetProxy, // call address of asset proxy + 0, // don't send any ETH + cdStart, // pointer to start of input + sub(cdEnd, cdStart), // length of input + cdStart, // write output over input + 512 // reserve 512 bytes for output + ) + if iszero(success) { + revert(cdStart, returndatasize()) + } + } + } + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol new file mode 100644 index 000000000..c0ed023ac --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol @@ -0,0 +1,436 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./libs/LibConstants.sol"; +import "./libs/LibFillResults.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibMath.sol"; +import "./mixins/MExchangeCore.sol"; +import "./mixins/MSignatureValidator.sol"; +import "./mixins/MTransactions.sol"; +import "./mixins/MAssetProxyDispatcher.sol"; + +contract MixinExchangeCore is + LibConstants, + LibMath, + LibOrder, + LibFillResults, + MAssetProxyDispatcher, + MExchangeCore, + MSignatureValidator, + MTransactions +{ + // Mapping of orderHash => amount of takerAsset already bought by maker + mapping (bytes32 => uint256) public filled; + + // Mapping of orderHash => cancelled + mapping (bytes32 => bool) public cancelled; + + // Mapping of makerAddress => senderAddress => lowest salt an order can have in order to be fillable + // Orders with specified senderAddress and with a salt less than their epoch to are considered cancelled + mapping (address => mapping (address => uint256)) public orderEpoch; + + ////// Core exchange functions ////// + + /// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch + /// and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress). + /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled. + function cancelOrdersUpTo(uint256 targetOrderEpoch) + external + { + address makerAddress = getCurrentContextAddress(); + // If this function is called via `executeTransaction`, we only update the orderEpoch for the makerAddress/msg.sender combination. + // This allows external filter contracts to add rules to how orders are cancelled via this function. + address senderAddress = makerAddress == msg.sender ? address(0) : msg.sender; + + // orderEpoch is initialized to 0, so to cancelUpTo we need salt + 1 + uint256 newOrderEpoch = targetOrderEpoch + 1; + uint256 oldOrderEpoch = orderEpoch[makerAddress][senderAddress]; + + // Ensure orderEpoch is monotonically increasing + require( + newOrderEpoch > oldOrderEpoch, + "INVALID_NEW_ORDER_EPOCH" + ); + + // Update orderEpoch + orderEpoch[makerAddress][senderAddress] = newOrderEpoch; + emit CancelUpTo(makerAddress, senderAddress, newOrderEpoch); + } + + /// @dev Fills the input order. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + /// @return Amounts filled and fees paid by maker and taker. + function fillOrder( + Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (FillResults memory fillResults) + { + // Fetch order info + OrderInfo memory orderInfo = getOrderInfo(order); + + // Fetch taker address + address takerAddress = getCurrentContextAddress(); + + // Get amount of takerAsset to fill + uint256 remainingTakerAssetAmount = safeSub(order.takerAssetAmount, orderInfo.orderTakerAssetFilledAmount); + uint256 takerAssetFilledAmount = min256(takerAssetFillAmount, remainingTakerAssetAmount); + + // Validate context + assertValidFill( + order, + orderInfo, + takerAddress, + takerAssetFillAmount, + takerAssetFilledAmount, + signature + ); + + // Compute proportional fill amounts + fillResults = calculateFillResults(order, takerAssetFilledAmount); + + // Update exchange internal state + updateFilledState( + order, + takerAddress, + orderInfo.orderHash, + orderInfo.orderTakerAssetFilledAmount, + fillResults + ); + + // Settle order + settleOrder(order, takerAddress, fillResults); + + return fillResults; + } + + /// @dev After calling, the order can not be filled anymore. + /// Throws if order is invalid or sender does not have permission to cancel. + /// @param order Order to cancel. Order must be OrderStatus.FILLABLE. + function cancelOrder(Order memory order) + public + { + // Fetch current order status + OrderInfo memory orderInfo = getOrderInfo(order); + + // Validate context + assertValidCancel(order, orderInfo); + + // Perform cancel + updateCancelledState(order, orderInfo.orderHash); + } + + /// @dev Gets information about an order: status, hash, and amount filled. + /// @param order Order to gather information on. + /// @return OrderInfo Information about the order and its state. + /// See LibOrder.OrderInfo for a complete description. + function getOrderInfo(Order memory order) + public + view + returns (OrderInfo memory orderInfo) + { + // Compute the order hash + orderInfo.orderHash = getOrderHash(order); + + // If order.makerAssetAmount is zero, we also reject the order. + // While the Exchange contract handles them correctly, they create + // edge cases in the supporting infrastructure because they have + // an 'infinite' price when computed by a simple division. + if (order.makerAssetAmount == 0) { + orderInfo.orderStatus = uint8(OrderStatus.INVALID_MAKER_ASSET_AMOUNT); + return orderInfo; + } + + // If order.takerAssetAmount is zero, then the order will always + // be considered filled because 0 == takerAssetAmount == orderTakerAssetFilledAmount + // Instead of distinguishing between unfilled and filled zero taker + // amount orders, we choose not to support them. + if (order.takerAssetAmount == 0) { + orderInfo.orderStatus = uint8(OrderStatus.INVALID_TAKER_ASSET_AMOUNT); + return orderInfo; + } + + // Validate order expiration + if (block.timestamp >= order.expirationTimeSeconds) { + orderInfo.orderStatus = uint8(OrderStatus.EXPIRED); + return orderInfo; + } + + // Check if order has been cancelled + if (cancelled[orderInfo.orderHash]) { + orderInfo.orderStatus = uint8(OrderStatus.CANCELLED); + return orderInfo; + } + if (orderEpoch[order.makerAddress][order.senderAddress] > order.salt) { + orderInfo.orderStatus = uint8(OrderStatus.CANCELLED); + return orderInfo; + } + + // Fetch filled amount and validate order availability + orderInfo.orderTakerAssetFilledAmount = filled[orderInfo.orderHash]; + if (orderInfo.orderTakerAssetFilledAmount >= order.takerAssetAmount) { + orderInfo.orderStatus = uint8(OrderStatus.FULLY_FILLED); + return orderInfo; + } + + // All other statuses are ruled out: order is Fillable + orderInfo.orderStatus = uint8(OrderStatus.FILLABLE); + return orderInfo; + } + + /// @dev Updates state with results of a fill order. + /// @param order that was filled. + /// @param takerAddress Address of taker who filled the order. + /// @param orderTakerAssetFilledAmount Amount of order already filled. + /// @return fillResults Amounts filled and fees paid by maker and taker. + function updateFilledState( + Order memory order, + address takerAddress, + bytes32 orderHash, + uint256 orderTakerAssetFilledAmount, + FillResults memory fillResults + ) + internal + { + // Update state + filled[orderHash] = safeAdd(orderTakerAssetFilledAmount, fillResults.takerAssetFilledAmount); + + // Log order + emit Fill( + order.makerAddress, + order.feeRecipientAddress, + takerAddress, + msg.sender, + fillResults.makerAssetFilledAmount, + fillResults.takerAssetFilledAmount, + fillResults.makerFeePaid, + fillResults.takerFeePaid, + orderHash, + order.makerAssetData, + order.takerAssetData + ); + } + + /// @dev Updates state with results of cancelling an order. + /// State is only updated if the order is currently fillable. + /// Otherwise, updating state would have no effect. + /// @param order that was cancelled. + /// @param orderHash Hash of order that was cancelled. + function updateCancelledState( + Order memory order, + bytes32 orderHash + ) + internal + { + // Perform cancel + cancelled[orderHash] = true; + + // Log cancel + emit Cancel( + order.makerAddress, + order.feeRecipientAddress, + msg.sender, + orderHash, + order.makerAssetData, + order.takerAssetData + ); + } + + /// @dev Validates context for fillOrder. Succeeds or throws. + /// @param order to be filled. + /// @param orderInfo OrderStatus, orderHash, and amount already filled of order. + /// @param takerAddress Address of order taker. + /// @param takerAssetFillAmount Desired amount of order to fill by taker. + /// @param takerAssetFilledAmount Amount of takerAsset that will be filled. + /// @param signature Proof that the orders was created by its maker. + function assertValidFill( + Order memory order, + OrderInfo memory orderInfo, + address takerAddress, + uint256 takerAssetFillAmount, + uint256 takerAssetFilledAmount, + bytes memory signature + ) + internal + view + { + // An order can only be filled if its status is FILLABLE. + require( + orderInfo.orderStatus == uint8(OrderStatus.FILLABLE), + "ORDER_UNFILLABLE" + ); + + // Revert if fill amount is invalid + require( + takerAssetFillAmount != 0, + "INVALID_TAKER_AMOUNT" + ); + + // Validate sender is allowed to fill this order + if (order.senderAddress != address(0)) { + require( + order.senderAddress == msg.sender, + "INVALID_SENDER" + ); + } + + // Validate taker is allowed to fill this order + if (order.takerAddress != address(0)) { + require( + order.takerAddress == takerAddress, + "INVALID_TAKER" + ); + } + + // Validate Maker signature (check only if first time seen) + if (orderInfo.orderTakerAssetFilledAmount == 0) { + require( + isValidSignature( + orderInfo.orderHash, + order.makerAddress, + signature + ), + "INVALID_ORDER_SIGNATURE" + ); + } + + // Validate fill order rounding + require( + !isRoundingError( + takerAssetFilledAmount, + order.takerAssetAmount, + order.makerAssetAmount + ), + "ROUNDING_ERROR" + ); + } + + /// @dev Validates context for cancelOrder. Succeeds or throws. + /// @param order to be cancelled. + /// @param orderInfo OrderStatus, orderHash, and amount already filled of order. + function assertValidCancel( + Order memory order, + OrderInfo memory orderInfo + ) + internal + view + { + // Ensure order is valid + // An order can only be cancelled if its status is FILLABLE. + require( + orderInfo.orderStatus == uint8(OrderStatus.FILLABLE), + "ORDER_UNFILLABLE" + ); + + // Validate sender is allowed to cancel this order + if (order.senderAddress != address(0)) { + require( + order.senderAddress == msg.sender, + "INVALID_SENDER" + ); + } + + // Validate transaction signed by maker + address makerAddress = getCurrentContextAddress(); + require( + order.makerAddress == makerAddress, + "INVALID_MAKER" + ); + } + + /// @dev Calculates amounts filled and fees paid by maker and taker. + /// @param order to be filled. + /// @param takerAssetFilledAmount Amount of takerAsset that will be filled. + /// @return fillResults Amounts filled and fees paid by maker and taker. + function calculateFillResults( + Order memory order, + uint256 takerAssetFilledAmount + ) + internal + pure + returns (FillResults memory fillResults) + { + // Compute proportional transfer amounts + // TODO: All three are multiplied by the same fraction. This can + // potentially be optimized. + fillResults.takerAssetFilledAmount = takerAssetFilledAmount; + fillResults.makerAssetFilledAmount = getPartialAmount( + fillResults.takerAssetFilledAmount, + order.takerAssetAmount, + order.makerAssetAmount + ); + fillResults.makerFeePaid = getPartialAmount( + fillResults.takerAssetFilledAmount, + order.takerAssetAmount, + order.makerFee + ); + fillResults.takerFeePaid = getPartialAmount( + fillResults.takerAssetFilledAmount, + order.takerAssetAmount, + order.takerFee + ); + + return fillResults; + } + + /// @dev Settles an order by transferring assets between counterparties. + /// @param order Order struct containing order specifications. + /// @param takerAddress Address selling takerAsset and buying makerAsset. + /// @param fillResults Amounts to be filled and fees paid by maker and taker. + function settleOrder( + LibOrder.Order memory order, + address takerAddress, + LibFillResults.FillResults memory fillResults + ) + private + { + bytes memory zrxAssetData = ZRX_ASSET_DATA; + dispatchTransferFrom( + order.makerAssetData, + order.makerAddress, + takerAddress, + fillResults.makerAssetFilledAmount + ); + dispatchTransferFrom( + order.takerAssetData, + takerAddress, + order.makerAddress, + fillResults.takerAssetFilledAmount + ); + dispatchTransferFrom( + zrxAssetData, + order.makerAddress, + order.feeRecipientAddress, + fillResults.makerFeePaid + ); + dispatchTransferFrom( + zrxAssetData, + takerAddress, + order.feeRecipientAddress, + fillResults.takerFeePaid + ); + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol new file mode 100644 index 000000000..1a43eec79 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol @@ -0,0 +1,301 @@ +/* + Copyright 2018 ZeroEx Intl. + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + http://www.apache.org/licenses/LICENSE-2.0 + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./libs/LibConstants.sol"; +import "./libs/LibMath.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibFillResults.sol"; +import "./mixins/MExchangeCore.sol"; +import "./mixins/MMatchOrders.sol"; +import "./mixins/MTransactions.sol"; +import "./mixins/MAssetProxyDispatcher.sol"; + +contract MixinMatchOrders is + LibConstants, + LibMath, + MAssetProxyDispatcher, + MExchangeCore, + MMatchOrders, + MTransactions +{ + /// @dev Match two complementary orders that have a profitable spread. + /// Each order is filled at their respective price point. However, the calculations are + /// carried out as though the orders are both being filled at the right order's price point. + /// The profit made by the left order goes to the taker (who matched the two orders). + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + /// @param leftSignature Proof that order was created by the left maker. + /// @param rightSignature Proof that order was created by the right maker. + /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders. + /// TODO: Make this function external once supported by Solidity (See Solidity Issues #3199, #1603) + function matchOrders( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder, + bytes memory leftSignature, + bytes memory rightSignature + ) + public + returns (LibFillResults.MatchedFillResults memory matchedFillResults) + { + // We assume that rightOrder.takerAssetData == leftOrder.makerAssetData and rightOrder.makerAssetData == leftOrder.takerAssetData. + // If this assumption isn't true, the match will fail at signature validation. + rightOrder.makerAssetData = leftOrder.takerAssetData; + rightOrder.takerAssetData = leftOrder.makerAssetData; + + // Get left & right order info + LibOrder.OrderInfo memory leftOrderInfo = getOrderInfo(leftOrder); + LibOrder.OrderInfo memory rightOrderInfo = getOrderInfo(rightOrder); + + // Fetch taker address + address takerAddress = getCurrentContextAddress(); + + // Either our context is valid or we revert + assertValidMatch(leftOrder, rightOrder); + + // Compute proportional fill amounts + matchedFillResults = calculateMatchedFillResults( + leftOrder, + rightOrder, + leftOrderInfo.orderTakerAssetFilledAmount, + rightOrderInfo.orderTakerAssetFilledAmount + ); + + // Validate fill contexts + assertValidFill( + leftOrder, + leftOrderInfo, + takerAddress, + matchedFillResults.left.takerAssetFilledAmount, + matchedFillResults.left.takerAssetFilledAmount, + leftSignature + ); + assertValidFill( + rightOrder, + rightOrderInfo, + takerAddress, + matchedFillResults.right.takerAssetFilledAmount, + matchedFillResults.right.takerAssetFilledAmount, + rightSignature + ); + + // Update exchange state + updateFilledState( + leftOrder, + takerAddress, + leftOrderInfo.orderHash, + leftOrderInfo.orderTakerAssetFilledAmount, + matchedFillResults.left + ); + updateFilledState( + rightOrder, + takerAddress, + rightOrderInfo.orderHash, + rightOrderInfo.orderTakerAssetFilledAmount, + matchedFillResults.right + ); + + // Settle matched orders. Succeeds or throws. + settleMatchedOrders( + leftOrder, + rightOrder, + takerAddress, + matchedFillResults + ); + + return matchedFillResults; + } + + /// @dev Validates context for matchOrders. Succeeds or throws. + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + function assertValidMatch( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder + ) + internal + pure + { + // Make sure there is a profitable spread. + // There is a profitable spread iff the cost per unit bought (OrderA.MakerAmount/OrderA.TakerAmount) for each order is greater + // than the profit per unit sold of the matched order (OrderB.TakerAmount/OrderB.MakerAmount). + // This is satisfied by the equations below: + // <leftOrder.makerAssetAmount> / <leftOrder.takerAssetAmount> >= <rightOrder.takerAssetAmount> / <rightOrder.makerAssetAmount> + // AND + // <rightOrder.makerAssetAmount> / <rightOrder.takerAssetAmount> >= <leftOrder.takerAssetAmount> / <leftOrder.makerAssetAmount> + // These equations can be combined to get the following: + require( + safeMul(leftOrder.makerAssetAmount, rightOrder.makerAssetAmount) >= + safeMul(leftOrder.takerAssetAmount, rightOrder.takerAssetAmount), + "NEGATIVE_SPREAD_REQUIRED" + ); + } + + /// @dev Calculates fill amounts for the matched orders. + /// Each order is filled at their respective price point. However, the calculations are + /// carried out as though the orders are both being filled at the right order's price point. + /// The profit made by the leftOrder order goes to the taker (who matched the two orders). + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + /// @param leftOrderTakerAssetFilledAmount Amount of left order already filled. + /// @param rightOrderTakerAssetFilledAmount Amount of right order already filled. + /// @param matchedFillResults Amounts to fill and fees to pay by maker and taker of matched orders. + function calculateMatchedFillResults( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder, + uint256 leftOrderTakerAssetFilledAmount, + uint256 rightOrderTakerAssetFilledAmount + ) + internal + pure + returns (LibFillResults.MatchedFillResults memory matchedFillResults) + { + // We settle orders at the exchange rate of the right order. + // The amount saved by the left maker goes to the taker. + // Either the left or right order will be fully filled; possibly both. + // The left order is fully filled iff the right order can sell more than left can buy. + // That is: the amount required to fill the left order is less than or equal to + // the amount we can spend from the right order: + // <leftTakerAssetAmountRemaining> <= <rightTakerAssetAmountRemaining> * <rightMakerToTakerRatio> + // <leftTakerAssetAmountRemaining> <= <rightTakerAssetAmountRemaining> * <rightOrder.makerAssetAmount> / <rightOrder.takerAssetAmount> + // <leftTakerAssetAmountRemaining> * <rightOrder.takerAssetAmount> <= <rightTakerAssetAmountRemaining> * <rightOrder.makerAssetAmount> + uint256 leftTakerAssetAmountRemaining = safeSub(leftOrder.takerAssetAmount, leftOrderTakerAssetFilledAmount); + uint256 rightTakerAssetAmountRemaining = safeSub(rightOrder.takerAssetAmount, rightOrderTakerAssetFilledAmount); + uint256 leftTakerAssetFilledAmount; + uint256 rightTakerAssetFilledAmount; + if ( + safeMul(leftTakerAssetAmountRemaining, rightOrder.takerAssetAmount) <= + safeMul(rightTakerAssetAmountRemaining, rightOrder.makerAssetAmount) + ) { + // Left order will be fully filled: maximally fill left + leftTakerAssetFilledAmount = leftTakerAssetAmountRemaining; + + // The right order receives an amount proportional to how much was spent. + // TODO: Can we ensure rounding error is in the correct direction? + rightTakerAssetFilledAmount = getPartialAmount( + rightOrder.takerAssetAmount, + rightOrder.makerAssetAmount, + leftTakerAssetFilledAmount + ); + } else { + // Right order will be fully filled: maximally fill right + rightTakerAssetFilledAmount = rightTakerAssetAmountRemaining; + + // The left order receives an amount proportional to how much was spent. + // TODO: Can we ensure rounding error is in the correct direction? + leftTakerAssetFilledAmount = getPartialAmount( + rightOrder.makerAssetAmount, + rightOrder.takerAssetAmount, + rightTakerAssetFilledAmount + ); + } + + // Calculate fill results for left order + matchedFillResults.left = calculateFillResults( + leftOrder, + leftTakerAssetFilledAmount + ); + + // Calculate fill results for right order + matchedFillResults.right = calculateFillResults( + rightOrder, + rightTakerAssetFilledAmount + ); + + // Calculate amount given to taker + matchedFillResults.leftMakerAssetSpreadAmount = safeSub( + matchedFillResults.left.makerAssetFilledAmount, + matchedFillResults.right.takerAssetFilledAmount + ); + + // Return fill results + return matchedFillResults; + } + + /// @dev Settles matched order by transferring appropriate funds between order makers, taker, and fee recipient. + /// @param leftOrder First matched order. + /// @param rightOrder Second matched order. + /// @param takerAddress Address that matched the orders. The taker receives the spread between orders as profit. + /// @param matchedFillResults Struct holding amounts to transfer between makers, taker, and fee recipients. + function settleMatchedOrders( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder, + address takerAddress, + LibFillResults.MatchedFillResults memory matchedFillResults + ) + private + { + bytes memory zrxAssetData = ZRX_ASSET_DATA; + // Order makers and taker + dispatchTransferFrom( + leftOrder.makerAssetData, + leftOrder.makerAddress, + rightOrder.makerAddress, + matchedFillResults.right.takerAssetFilledAmount + ); + dispatchTransferFrom( + rightOrder.makerAssetData, + rightOrder.makerAddress, + leftOrder.makerAddress, + matchedFillResults.left.takerAssetFilledAmount + ); + dispatchTransferFrom( + leftOrder.makerAssetData, + leftOrder.makerAddress, + takerAddress, + matchedFillResults.leftMakerAssetSpreadAmount + ); + + // Maker fees + dispatchTransferFrom( + zrxAssetData, + leftOrder.makerAddress, + leftOrder.feeRecipientAddress, + matchedFillResults.left.makerFeePaid + ); + dispatchTransferFrom( + zrxAssetData, + rightOrder.makerAddress, + rightOrder.feeRecipientAddress, + matchedFillResults.right.makerFeePaid + ); + + // Taker fees + if (leftOrder.feeRecipientAddress == rightOrder.feeRecipientAddress) { + dispatchTransferFrom( + zrxAssetData, + takerAddress, + leftOrder.feeRecipientAddress, + safeAdd( + matchedFillResults.left.takerFeePaid, + matchedFillResults.right.takerFeePaid + ) + ); + } else { + dispatchTransferFrom( + zrxAssetData, + takerAddress, + leftOrder.feeRecipientAddress, + matchedFillResults.left.takerFeePaid + ); + dispatchTransferFrom( + zrxAssetData, + takerAddress, + rightOrder.feeRecipientAddress, + matchedFillResults.right.takerFeePaid + ); + } + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol new file mode 100644 index 000000000..29172057a --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol @@ -0,0 +1,255 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../utils/LibBytes/LibBytes.sol"; +import "./mixins/MSignatureValidator.sol"; +import "./mixins/MTransactions.sol"; +import "./interfaces/IWallet.sol"; +import "./interfaces/IValidator.sol"; + +contract MixinSignatureValidator is + MSignatureValidator, + MTransactions +{ + using LibBytes for bytes; + + // Mapping of hash => signer => signed + mapping (bytes32 => mapping (address => bool)) public preSigned; + + // Mapping of signer => validator => approved + mapping (address => mapping (address => bool)) public allowedValidators; + + /// @dev Approves a hash on-chain using any valid signature type. + /// After presigning a hash, the preSign signature type will become valid for that hash and signer. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof that the hash has been signed by signer. + function preSign( + bytes32 hash, + address signerAddress, + bytes signature + ) + external + { + require( + isValidSignature( + hash, + signerAddress, + signature + ), + "INVALID_SIGNATURE" + ); + preSigned[hash][signerAddress] = true; + } + + /// @dev Approves/unnapproves a Validator contract to verify signatures on signer's behalf. + /// @param validatorAddress Address of Validator contract. + /// @param approval Approval or disapproval of Validator contract. + function setSignatureValidatorApproval( + address validatorAddress, + bool approval + ) + external + { + address signerAddress = getCurrentContextAddress(); + allowedValidators[signerAddress][validatorAddress] = approval; + emit SignatureValidatorApproval( + signerAddress, + validatorAddress, + approval + ); + } + + /// @dev Verifies that a hash has been signed by the given signer. + /// @param hash Any 32 byte hash. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof that the hash has been signed by signer. + /// @return True if the address recovered from the provided signature matches the input signer address. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes memory signature + ) + public + view + returns (bool isValid) + { + // TODO: Domain separation: make hash depend on role. (Taker sig should not be valid as maker sig, etc.) + require( + signature.length > 0, + "LENGTH_GREATER_THAN_0_REQUIRED" + ); + + // Ensure signature is supported + uint8 signatureTypeRaw = uint8(signature.popLastByte()); + require( + signatureTypeRaw < uint8(SignatureType.NSignatureTypes), + "SIGNATURE_UNSUPPORTED" + ); + + // Pop last byte off of signature byte array. + SignatureType signatureType = SignatureType(signatureTypeRaw); + + // Variables are not scoped in Solidity. + uint8 v; + bytes32 r; + bytes32 s; + address recovered; + + // Always illegal signature. + // This is always an implicit option since a signer can create a + // signature array with invalid type or length. We may as well make + // it an explicit option. This aids testing and analysis. It is + // also the initialization value for the enum type. + if (signatureType == SignatureType.Illegal) { + revert("SIGNATURE_ILLEGAL"); + + // Always invalid signature. + // Like Illegal, this is always implicitly available and therefore + // offered explicitly. It can be implicitly created by providing + // a correctly formatted but incorrect signature. + } else if (signatureType == SignatureType.Invalid) { + require( + signature.length == 0, + "LENGTH_0_REQUIRED" + ); + isValid = false; + return isValid; + + // Signature using EIP712 + } else if (signatureType == SignatureType.EIP712) { + require( + signature.length == 65, + "LENGTH_65_REQUIRED" + ); + v = uint8(signature[0]); + r = signature.readBytes32(1); + s = signature.readBytes32(33); + recovered = ecrecover(hash, v, r, s); + isValid = signerAddress == recovered; + return isValid; + + // Signed using web3.eth_sign + } else if (signatureType == SignatureType.EthSign) { + require( + signature.length == 65, + "LENGTH_65_REQUIRED" + ); + v = uint8(signature[0]); + r = signature.readBytes32(1); + s = signature.readBytes32(33); + recovered = ecrecover( + keccak256(abi.encodePacked( + "\x19Ethereum Signed Message:\n32", + hash + )), + v, + r, + s + ); + isValid = signerAddress == recovered; + return isValid; + + // Implicitly signed by caller. + // The signer has initiated the call. In the case of non-contract + // accounts it means the transaction itself was signed. + // Example: let's say for a particular operation three signatures + // A, B and C are required. To submit the transaction, A and B can + // give a signature to C, who can then submit the transaction using + // `Caller` for his own signature. Or A and C can sign and B can + // submit using `Caller`. Having `Caller` allows this flexibility. + } else if (signatureType == SignatureType.Caller) { + require( + signature.length == 0, + "LENGTH_0_REQUIRED" + ); + isValid = signerAddress == msg.sender; + return isValid; + + // Signature verified by wallet contract. + // If used with an order, the maker of the order is the wallet contract. + } else if (signatureType == SignatureType.Wallet) { + isValid = IWallet(signerAddress).isValidSignature(hash, signature); + return isValid; + + // Signature verified by validator contract. + // If used with an order, the maker of the order can still be an EOA. + // A signature using this type should be encoded as: + // | Offset | Length | Contents | + // | 0x00 | x | Signature to validate | + // | 0x00 + x | 20 | Address of validator contract | + // | 0x14 + x | 1 | Signature type is always "\x06" | + } else if (signatureType == SignatureType.Validator) { + // Pop last 20 bytes off of signature byte array. + + address validatorAddress = signature.popLast20Bytes(); + + // Ensure signer has approved validator. + if (!allowedValidators[signerAddress][validatorAddress]) { + return false; + } + isValid = IValidator(validatorAddress).isValidSignature( + hash, + signerAddress, + signature + ); + return isValid; + + // Signer signed hash previously using the preSign function. + } else if (signatureType == SignatureType.PreSigned) { + isValid = preSigned[hash][signerAddress]; + return isValid; + + // Signature from Trezor hardware wallet. + // It differs from web3.eth_sign in the encoding of message length + // (Bitcoin varint encoding vs ascii-decimal, the latter is not + // self-terminating which leads to ambiguities). + // See also: + // https://en.bitcoin.it/wiki/Protocol_documentation#Variable_length_integer + // https://github.com/trezor/trezor-mcu/blob/master/firmware/ethereum.c#L602 + // https://github.com/trezor/trezor-mcu/blob/master/firmware/crypto.c#L36 + } else if (signatureType == SignatureType.Trezor) { + require( + signature.length == 65, + "LENGTH_65_REQUIRED" + ); + v = uint8(signature[0]); + r = signature.readBytes32(1); + s = signature.readBytes32(33); + recovered = ecrecover( + keccak256(abi.encodePacked( + "\x19Ethereum Signed Message:\n\x20", + hash + )), + v, + r, + s + ); + isValid = signerAddress == recovered; + return isValid; + } + + // Anything else is illegal (We do not return false because + // the signature may actually be valid, just not in a format + // that we currently support. In this case returning false + // may lead the caller to incorrectly believe that the + // signature was invalid.) + revert("SIGNATURE_UNSUPPORTED"); + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol new file mode 100644 index 000000000..31f7f2847 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol @@ -0,0 +1,154 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ +pragma solidity ^0.4.24; + +import "./libs/LibExchangeErrors.sol"; +import "./mixins/MSignatureValidator.sol"; +import "./mixins/MTransactions.sol"; +import "./libs/LibEIP712.sol"; + +contract MixinTransactions is + LibEIP712, + MSignatureValidator, + MTransactions +{ + + // Mapping of transaction hash => executed + // This prevents transactions from being executed more than once. + mapping (bytes32 => bool) public transactions; + + // Address of current transaction signer + address public currentContextAddress; + + // Hash for the EIP712 ZeroEx Transaction Schema + bytes32 constant EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked( + "ZeroExTransaction(", + "uint256 salt,", + "address signerAddress,", + "bytes data", + ")" + )); + + /// @dev Calculates EIP712 hash of the Transaction. + /// @param salt Arbitrary number to ensure uniqueness of transaction hash. + /// @param signerAddress Address of transaction signer. + /// @param data AbiV2 encoded calldata. + /// @return EIP712 hash of the Transaction. + function hashZeroExTransaction( + uint256 salt, + address signerAddress, + bytes memory data + ) + internal + pure + returns (bytes32 result) + { + bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH; + bytes32 dataHash = keccak256(data); + // Assembly for more efficiently computing: + // keccak256(abi.encode( + // EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH, + // salt, + // signerAddress, + // keccak256(data) + // )); + assembly { + let memPtr := mload(64) + mstore(memPtr, schemaHash) + mstore(add(memPtr, 32), salt) + mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff)) + mstore(add(memPtr, 96), dataHash) + result := keccak256(memPtr, 128) + } + + return result; + } + + /// @dev Executes an exchange method call in the context of signer. + /// @param salt Arbitrary number to ensure uniqueness of transaction hash. + /// @param signerAddress Address of transaction signer. + /// @param data AbiV2 encoded calldata. + /// @param signature Proof of signer transaction by signer. + function executeTransaction( + uint256 salt, + address signerAddress, + bytes data, + bytes signature + ) + external + { + // Prevent reentrancy + require( + currentContextAddress == address(0), + "REENTRANCY_ILLEGAL" + ); + + bytes32 transactionHash = hashEIP712Message(hashZeroExTransaction( + salt, + signerAddress, + data + )); + + // Validate transaction has not been executed + require( + !transactions[transactionHash], + "INVALID_TX_HASH" + ); + + // Transaction always valid if signer is sender of transaction + if (signerAddress != msg.sender) { + // Validate signature + require( + isValidSignature( + transactionHash, + signerAddress, + signature + ), + "INVALID_TX_SIGNATURE" + ); + + // Set the current transaction signer + currentContextAddress = signerAddress; + } + + // Execute transaction + transactions[transactionHash] = true; + require( + address(this).delegatecall(data), + "FAILED_EXECUTION" + ); + + // Reset current transaction signer + // TODO: Check if gas is paid when currentContextAddress is already 0. + currentContextAddress = address(0); + } + + /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`). + /// If calling a fill function, this address will represent the taker. + /// If calling a cancel function, this address will represent the maker. + /// @return Signer of 0x transaction if entry point is `executeTransaction`. + /// `msg.sender` if entry point is any other function. + function getCurrentContextAddress() + internal + view + returns (address) + { + address contextAddress = currentContextAddress == address(0) ? msg.sender : currentContextAddress; + return contextAddress; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol new file mode 100644 index 000000000..00668ca43 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol @@ -0,0 +1,531 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./libs/LibMath.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibFillResults.sol"; +import "./mixins/MExchangeCore.sol"; + +contract MixinWrapperFunctions is + LibMath, + LibFillResults, + MExchangeCore +{ + /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + function fillOrKillOrder( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (FillResults memory fillResults) + { + fillResults = fillOrder( + order, + takerAssetFillAmount, + signature + ); + require( + fillResults.takerAssetFilledAmount == takerAssetFillAmount, + "COMPLETE_FILL_FAILED" + ); + return fillResults; + } + + /// @dev Fills an order with specified parameters and ECDSA signature. + /// Returns false if the transaction would otherwise revert. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + /// @return Amounts filled and fees paid by maker and taker. + function fillOrderNoThrow( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (FillResults memory fillResults) + { + // We need to call MExchangeCore.fillOrder using a delegatecall in + // assembly so that we can intercept a call that throws. For this, we + // need the input encoded in memory in the Ethereum ABIv2 format [1]. + + // | Area | Offset | Length | Contents | + // | -------- |--------|---------|-------------------------------------------- | + // | Header | 0x00 | 4 | function selector | + // | Params | | 3 * 32 | function parameters: | + // | | 0x00 | | 1. offset to order (*) | + // | | 0x20 | | 2. takerAssetFillAmount | + // | | 0x40 | | 3. offset to signature (*) | + // | Data | | 12 * 32 | order: | + // | | 0x000 | | 1. senderAddress | + // | | 0x020 | | 2. makerAddress | + // | | 0x040 | | 3. takerAddress | + // | | 0x060 | | 4. feeRecipientAddress | + // | | 0x080 | | 5. makerAssetAmount | + // | | 0x0A0 | | 6. takerAssetAmount | + // | | 0x0C0 | | 7. makerFeeAmount | + // | | 0x0E0 | | 8. takerFeeAmount | + // | | 0x100 | | 9. expirationTimeSeconds | + // | | 0x120 | | 10. salt | + // | | 0x140 | | 11. Offset to makerAssetData (*) | + // | | 0x160 | | 12. Offset to takerAssetData (*) | + // | | 0x180 | 32 | makerAssetData Length | + // | | 0x1A0 | ** | makerAssetData Contents | + // | | 0x1C0 | 32 | takerAssetData Length | + // | | 0x1E0 | ** | takerAssetData Contents | + // | | 0x200 | 32 | signature Length | + // | | 0x220 | ** | signature Contents | + + // * Offsets are calculated from the beginning of the current area: Header, Params, Data: + // An offset stored in the Params area is calculated from the beginning of the Params section. + // An offset stored in the Data area is calculated from the beginning of the Data section. + + // ** The length of dynamic array contents are stored in the field immediately preceeding the contents. + + // [1]: https://solidity.readthedocs.io/en/develop/abi-spec.html + + bytes4 fillOrderSelector = this.fillOrder.selector; + + assembly { + + // Areas below may use the following variables: + // 1. <area>Start -- Start of this area in memory + // 2. <area>End -- End of this area in memory. This value may + // be precomputed (before writing contents), + // or it may be computed as contents are written. + // 3. <area>Offset -- Current offset into area. If an area's End + // is precomputed, this variable tracks the + // offsets of contents as they are written. + + /////// Setup Header Area /////// + // Load free memory pointer + let headerAreaStart := mload(0x40) + mstore(headerAreaStart, fillOrderSelector) + let headerAreaEnd := add(headerAreaStart, 0x4) + + /////// Setup Params Area /////// + // This area is preallocated and written to later. + // This is because we need to fill in offsets that have not yet been calculated. + let paramsAreaStart := headerAreaEnd + let paramsAreaEnd := add(paramsAreaStart, 0x60) + let paramsAreaOffset := paramsAreaStart + + /////// Setup Data Area /////// + let dataAreaStart := paramsAreaEnd + let dataAreaEnd := dataAreaStart + + // Offset from the source data we're reading from + let sourceOffset := order + // arrayLenBytes and arrayLenWords track the length of a dynamically-allocated bytes array. + let arrayLenBytes := 0 + let arrayLenWords := 0 + + /////// Write order Struct /////// + // Write memory location of Order, relative to the start of the + // parameter list, then increment the paramsAreaOffset respectively. + mstore(paramsAreaOffset, sub(dataAreaEnd, paramsAreaStart)) + paramsAreaOffset := add(paramsAreaOffset, 0x20) + + // Write values for each field in the order + // It would be nice to use a loop, but we save on gas by writing + // the stores sequentially. + mstore(dataAreaEnd, mload(sourceOffset)) // makerAddress + mstore(add(dataAreaEnd, 0x20), mload(add(sourceOffset, 0x20))) // takerAddress + mstore(add(dataAreaEnd, 0x40), mload(add(sourceOffset, 0x40))) // feeRecipientAddress + mstore(add(dataAreaEnd, 0x60), mload(add(sourceOffset, 0x60))) // senderAddress + mstore(add(dataAreaEnd, 0x80), mload(add(sourceOffset, 0x80))) // makerAssetAmount + mstore(add(dataAreaEnd, 0xA0), mload(add(sourceOffset, 0xA0))) // takerAssetAmount + mstore(add(dataAreaEnd, 0xC0), mload(add(sourceOffset, 0xC0))) // makerFeeAmount + mstore(add(dataAreaEnd, 0xE0), mload(add(sourceOffset, 0xE0))) // takerFeeAmount + mstore(add(dataAreaEnd, 0x100), mload(add(sourceOffset, 0x100))) // expirationTimeSeconds + mstore(add(dataAreaEnd, 0x120), mload(add(sourceOffset, 0x120))) // salt + mstore(add(dataAreaEnd, 0x140), mload(add(sourceOffset, 0x140))) // Offset to makerAssetData + mstore(add(dataAreaEnd, 0x160), mload(add(sourceOffset, 0x160))) // Offset to takerAssetData + dataAreaEnd := add(dataAreaEnd, 0x180) + sourceOffset := add(sourceOffset, 0x180) + + // Write offset to <order.makerAssetData> + mstore(add(dataAreaStart, mul(10, 0x20)), sub(dataAreaEnd, dataAreaStart)) + + // Calculate length of <order.makerAssetData> + sourceOffset := mload(add(order, 0x140)) // makerAssetData + arrayLenBytes := mload(sourceOffset) + sourceOffset := add(sourceOffset, 0x20) + arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) + + // Write length of <order.makerAssetData> + mstore(dataAreaEnd, arrayLenBytes) + dataAreaEnd := add(dataAreaEnd, 0x20) + + // Write contents of <order.makerAssetData> + for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { + mstore(dataAreaEnd, mload(sourceOffset)) + dataAreaEnd := add(dataAreaEnd, 0x20) + sourceOffset := add(sourceOffset, 0x20) + } + + // Write offset to <order.takerAssetData> + mstore(add(dataAreaStart, mul(11, 0x20)), sub(dataAreaEnd, dataAreaStart)) + + // Calculate length of <order.takerAssetData> + sourceOffset := mload(add(order, 0x160)) // takerAssetData + arrayLenBytes := mload(sourceOffset) + sourceOffset := add(sourceOffset, 0x20) + arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) + + // Write length of <order.takerAssetData> + mstore(dataAreaEnd, arrayLenBytes) + dataAreaEnd := add(dataAreaEnd, 0x20) + + // Write contents of <order.takerAssetData> + for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { + mstore(dataAreaEnd, mload(sourceOffset)) + dataAreaEnd := add(dataAreaEnd, 0x20) + sourceOffset := add(sourceOffset, 0x20) + } + + /////// Write takerAssetFillAmount /////// + mstore(paramsAreaOffset, takerAssetFillAmount) + paramsAreaOffset := add(paramsAreaOffset, 0x20) + + /////// Write signature /////// + // Write offset to paramsArea + mstore(paramsAreaOffset, sub(dataAreaEnd, paramsAreaStart)) + + // Calculate length of signature + sourceOffset := signature + arrayLenBytes := mload(sourceOffset) + sourceOffset := add(sourceOffset, 0x20) + arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) + + // Write length of signature + mstore(dataAreaEnd, arrayLenBytes) + dataAreaEnd := add(dataAreaEnd, 0x20) + + // Write contents of signature + for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { + mstore(dataAreaEnd, mload(sourceOffset)) + dataAreaEnd := add(dataAreaEnd, 0x20) + sourceOffset := add(sourceOffset, 0x20) + } + + // Execute delegatecall + let success := delegatecall( + gas, // forward all gas, TODO: look into gas consumption of assert/throw + address, // call address of this contract + headerAreaStart, // pointer to start of input + sub(dataAreaEnd, headerAreaStart), // length of input + headerAreaStart, // write output over input + 128 // output size is 128 bytes + ) + switch success + case 0 { + mstore(fillResults, 0) + mstore(add(fillResults, 32), 0) + mstore(add(fillResults, 64), 0) + mstore(add(fillResults, 96), 0) + } + case 1 { + mstore(fillResults, mload(headerAreaStart)) + mstore(add(fillResults, 32), mload(add(headerAreaStart, 32))) + mstore(add(fillResults, 64), mload(add(headerAreaStart, 64))) + mstore(add(fillResults, 96), mload(add(headerAreaStart, 96))) + } + } + return fillResults; + } + + /// @dev Synchronously executes multiple calls of fillOrder. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + /// NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets. + function batchFillOrders( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + for (uint256 i = 0; i < orders.length; i++) { + FillResults memory singleFillResults = fillOrder( + orders[i], + takerAssetFillAmounts[i], + signatures[i] + ); + addFillResults(totalFillResults, singleFillResults); + } + return totalFillResults; + } + + /// @dev Synchronously executes multiple calls of fillOrKill. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + /// NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets. + function batchFillOrKillOrders( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + for (uint256 i = 0; i < orders.length; i++) { + FillResults memory singleFillResults = fillOrKillOrder( + orders[i], + takerAssetFillAmounts[i], + signatures[i] + ); + addFillResults(totalFillResults, singleFillResults); + } + return totalFillResults; + } + + /// @dev Fills an order with specified parameters and ECDSA signature. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + /// NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets. + function batchFillOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + for (uint256 i = 0; i < orders.length; i++) { + FillResults memory singleFillResults = fillOrderNoThrow( + orders[i], + takerAssetFillAmounts[i], + signatures[i] + ); + addFillResults(totalFillResults, singleFillResults); + } + return totalFillResults; + } + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketSellOrders( + LibOrder.Order[] memory orders, + uint256 takerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + bytes memory takerAssetData = orders[0].takerAssetData; + + for (uint256 i = 0; i < orders.length; i++) { + + // We assume that asset being sold by taker is the same for each order. + // Rather than passing this in as calldata, we use the takerAssetData from the first order in all later orders. + orders[i].takerAssetData = takerAssetData; + + // Calculate the remaining amount of takerAsset to sell + uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount); + + // Attempt to sell the remaining amount of takerAsset + FillResults memory singleFillResults = fillOrder( + orders[i], + remainingTakerAssetFillAmount, + signatures[i] + ); + + // Update amounts filled and fees paid by maker and taker + addFillResults(totalFillResults, singleFillResults); + + // Stop execution if the entire amount of takerAsset has been sold + if (totalFillResults.takerAssetFilledAmount == takerAssetFillAmount) { + break; + } + } + return totalFillResults; + } + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketSellOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256 takerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + bytes memory takerAssetData = orders[0].takerAssetData; + + for (uint256 i = 0; i < orders.length; i++) { + + // We assume that asset being sold by taker is the same for each order. + // Rather than passing this in as calldata, we use the takerAssetData from the first order in all later orders. + orders[i].takerAssetData = takerAssetData; + + // Calculate the remaining amount of takerAsset to sell + uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount); + + // Attempt to sell the remaining amount of takerAsset + FillResults memory singleFillResults = fillOrderNoThrow( + orders[i], + remainingTakerAssetFillAmount, + signatures[i] + ); + + // Update amounts filled and fees paid by maker and taker + addFillResults(totalFillResults, singleFillResults); + + // Stop execution if the entire amount of takerAsset has been sold + if (totalFillResults.takerAssetFilledAmount == takerAssetFillAmount) { + break; + } + } + return totalFillResults; + } + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of makerAsset is bought by taker. + /// @param orders Array of order specifications. + /// @param makerAssetFillAmount Desired amount of makerAsset to buy. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketBuyOrders( + LibOrder.Order[] memory orders, + uint256 makerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + bytes memory makerAssetData = orders[0].makerAssetData; + + for (uint256 i = 0; i < orders.length; i++) { + + // We assume that asset being bought by taker is the same for each order. + // Rather than passing this in as calldata, we copy the makerAssetData from the first order onto all later orders. + orders[i].makerAssetData = makerAssetData; + + // Calculate the remaining amount of makerAsset to buy + uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount); + + // Convert the remaining amount of makerAsset to buy into remaining amount + // of takerAsset to sell, assuming entire amount can be sold in the current order + uint256 remainingTakerAssetFillAmount = getPartialAmount( + orders[i].takerAssetAmount, + orders[i].makerAssetAmount, + remainingMakerAssetFillAmount + ); + + // Attempt to sell the remaining amount of takerAsset + FillResults memory singleFillResults = fillOrder( + orders[i], + remainingTakerAssetFillAmount, + signatures[i] + ); + + // Update amounts filled and fees paid by maker and taker + addFillResults(totalFillResults, singleFillResults); + + // Stop execution if the entire amount of makerAsset has been bought + if (totalFillResults.makerAssetFilledAmount == makerAssetFillAmount) { + break; + } + } + return totalFillResults; + } + + /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param makerAssetFillAmount Desired amount of makerAsset to buy. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketBuyOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256 makerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (FillResults memory totalFillResults) + { + bytes memory makerAssetData = orders[0].makerAssetData; + + for (uint256 i = 0; i < orders.length; i++) { + + // We assume that asset being bought by taker is the same for each order. + // Rather than passing this in as calldata, we copy the makerAssetData from the first order onto all later orders. + orders[i].makerAssetData = makerAssetData; + + // Calculate the remaining amount of makerAsset to buy + uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount); + + // Convert the remaining amount of makerAsset to buy into remaining amount + // of takerAsset to sell, assuming entire amount can be sold in the current order + uint256 remainingTakerAssetFillAmount = getPartialAmount( + orders[i].takerAssetAmount, + orders[i].makerAssetAmount, + remainingMakerAssetFillAmount + ); + + // Attempt to sell the remaining amount of takerAsset + FillResults memory singleFillResults = fillOrderNoThrow( + orders[i], + remainingTakerAssetFillAmount, + signatures[i] + ); + + // Update amounts filled and fees paid by maker and taker + addFillResults(totalFillResults, singleFillResults); + + // Stop execution if the entire amount of makerAsset has been bought + if (totalFillResults.makerAssetFilledAmount == makerAssetFillAmount) { + break; + } + } + return totalFillResults; + } + + /// @dev Synchronously cancels multiple orders in a single transaction. + /// @param orders Array of order specifications. + function batchCancelOrders(LibOrder.Order[] memory orders) + public + { + for (uint256 i = 0; i < orders.length; i++) { + cancelOrder(orders[i]); + } + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol new file mode 100644 index 000000000..66f3b5796 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol @@ -0,0 +1,36 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +contract IAssetProxyDispatcher { + + /// @dev Registers an asset proxy to its asset proxy id. + /// Once an asset proxy is registered, it cannot be unregistered. + /// @param assetProxy Address of new asset proxy to register. + function registerAssetProxy(address assetProxy) + external; + + /// @dev Gets an asset proxy. + /// @param assetProxyId Id of the asset proxy. + /// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered. + function getAssetProxy(bytes4 assetProxyId) + external + view + returns (address); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol new file mode 100644 index 000000000..9f21c18d7 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol @@ -0,0 +1,36 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./IExchangeCore.sol"; +import "./IMatchOrders.sol"; +import "./ISignatureValidator.sol"; +import "./ITransactions.sol"; +import "./IAssetProxyDispatcher.sol"; +import "./IWrapperFunctions.sol"; + +contract IExchange is + IExchangeCore, + IMatchOrders, + ISignatureValidator, + ITransactions, + IAssetProxyDispatcher, + IWrapperFunctions +{} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol new file mode 100644 index 000000000..98222f33f --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol @@ -0,0 +1,59 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; + +contract IExchangeCore { + + /// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch + /// and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress). + /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled. + function cancelOrdersUpTo(uint256 targetOrderEpoch) + external; + + /// @dev Fills the input order. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + /// @return Amounts filled and fees paid by maker and taker. + function fillOrder( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (LibFillResults.FillResults memory fillResults); + + /// @dev After calling, the order can not be filled anymore. + /// @param order Order struct containing order specifications. + function cancelOrder(LibOrder.Order memory order) + public; + + /// @dev Gets information about an order: status, hash, and amount filled. + /// @param order Order to gather information on. + /// @return OrderInfo Information about the order and its state. + /// See LibOrder.OrderInfo for a complete description. + function getOrderInfo(LibOrder.Order memory order) + public + view + returns (LibOrder.OrderInfo memory orderInfo); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol new file mode 100644 index 000000000..df009d063 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol @@ -0,0 +1,44 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; + +contract IMatchOrders { + + /// @dev Match two complementary orders that have a profitable spread. + /// Each order is filled at their respective price point. However, the calculations are + /// carried out as though the orders are both being filled at the right order's price point. + /// The profit made by the left order goes to the taker (who matched the two orders). + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + /// @param leftSignature Proof that order was created by the left maker. + /// @param rightSignature Proof that order was created by the right maker. + /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders. + /// TODO: Make this function external once supported by Solidity (See Solidity Issues #3199, #1603) + function matchOrders( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder, + bytes memory leftSignature, + bytes memory rightSignature + ) + public + returns (LibFillResults.MatchedFillResults memory matchedFillResults); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol new file mode 100644 index 000000000..511463309 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol @@ -0,0 +1,56 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +contract ISignatureValidator { + + /// @dev Approves a hash on-chain using any valid signature type. + /// After presigning a hash, the preSign signature type will become valid for that hash and signer. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof that the hash has been signed by signer. + function preSign( + bytes32 hash, + address signerAddress, + bytes signature + ) + external; + + /// @dev Approves/unnapproves a Validator contract to verify signatures on signer's behalf. + /// @param validatorAddress Address of Validator contract. + /// @param approval Approval or disapproval of Validator contract. + function setSignatureValidatorApproval( + address validatorAddress, + bool approval + ) + external; + + /// @dev Verifies that a signature is valid. + /// @param hash Message hash that is signed. + /// @param signerAddress Address of signer. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes memory signature + ) + public + view + returns (bool isValid); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol new file mode 100644 index 000000000..a7cab8f55 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol @@ -0,0 +1,34 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ +pragma solidity ^0.4.24; + +contract ITransactions { + + /// @dev Executes an exchange method call in the context of signer. + /// @param salt Arbitrary number to ensure uniqueness of transaction hash. + /// @param signerAddress Address of transaction signer. + /// @param data AbiV2 encoded calldata. + /// @param signature Proof of signer transaction by signer. + function executeTransaction( + uint256 salt, + address signerAddress, + bytes data, + bytes signature + ) + external; +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol new file mode 100644 index 000000000..0b1796a66 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol @@ -0,0 +1,36 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.23; + +contract IValidator { + + /// @dev Verifies that a signature is valid. + /// @param hash Message hash that is signed. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes signature + ) + external + view + returns (bool isValid); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol new file mode 100644 index 000000000..c86a2c057 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol @@ -0,0 +1,34 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +contract IWallet { + + /// @dev Verifies that a signature is valid. + /// @param hash Message hash that is signed. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + bytes signature + ) + external + view + returns (bool isValid); +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol new file mode 100644 index 000000000..84bb683bc --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol @@ -0,0 +1,150 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; + +contract IWrapperFunctions { + /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled. + /// @param order LibOrder.Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + function fillOrKillOrder( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (LibFillResults.FillResults memory fillResults); + + /// @dev Fills an order with specified parameters and ECDSA signature. + /// Returns false if the transaction would otherwise revert. + /// @param order LibOrder.Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signature Proof that order has been created by maker. + /// @return Amounts filled and fees paid by maker and taker. + function fillOrderNoThrow( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + bytes memory signature + ) + public + returns (LibFillResults.FillResults memory fillResults); + + /// @dev Synchronously executes multiple calls of fillOrder. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + function batchFillOrders( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously executes multiple calls of fillOrKill. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + function batchFillOrKillOrders( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Fills an order with specified parameters and ECDSA signature. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + function batchFillOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256[] memory takerAssetFillAmounts, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signatures Proofs that orders have been created by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketSellOrders( + LibOrder.Order[] memory orders, + uint256 takerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketSellOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256 takerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously executes multiple calls of fillOrder until total amount of makerAsset is bought by taker. + /// @param orders Array of order specifications. + /// @param makerAssetFillAmount Desired amount of makerAsset to buy. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketBuyOrders( + LibOrder.Order[] memory orders, + uint256 makerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker. + /// Returns false if the transaction would otherwise revert. + /// @param orders Array of order specifications. + /// @param makerAssetFillAmount Desired amount of makerAsset to buy. + /// @param signatures Proofs that orders have been signed by makers. + /// @return Amounts filled and fees paid by makers and taker. + function marketBuyOrdersNoThrow( + LibOrder.Order[] memory orders, + uint256 makerAssetFillAmount, + bytes[] memory signatures + ) + public + returns (LibFillResults.FillResults memory totalFillResults); + + /// @dev Synchronously cancels multiple orders in a single transaction. + /// @param orders Array of order specifications. + function batchCancelOrders(LibOrder.Order[] memory orders) + public; +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol new file mode 100644 index 000000000..488ca956c --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol @@ -0,0 +1,34 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +contract LibConstants { + + // Asset data for ZRX token. Used for fee transfers. + // @TODO: Hardcode constant when we deploy. Currently + // not constant to make testing easier. + bytes public ZRX_ASSET_DATA; + + // @TODO: Remove when we deploy. + constructor (bytes memory zrxAssetData) + public + { + ZRX_ASSET_DATA = zrxAssetData; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol new file mode 100644 index 000000000..b983347a4 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol @@ -0,0 +1,64 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +contract LibEIP712 { + // EIP191 header for EIP712 prefix + string constant EIP191_HEADER = "\x19\x01"; + + // EIP712 Domain Name value + string constant EIP712_DOMAIN_NAME = "0x Protocol"; + + // EIP712 Domain Version value + string constant EIP712_DOMAIN_VERSION = "2"; + + // Hash of the EIP712 Domain Separator Schema + bytes32 public constant EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked( + "EIP712Domain(", + "string name,", + "string version,", + "address verifyingContract", + ")" + )); + + // Hash of the EIP712 Domain Separator data + bytes32 public EIP712_DOMAIN_HASH; + + constructor () + public + { + EIP712_DOMAIN_HASH = keccak256(abi.encode( + EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH, + keccak256(bytes(EIP712_DOMAIN_NAME)), + keccak256(bytes(EIP712_DOMAIN_VERSION)), + address(this) + )); + } + + /// @dev Calculates EIP712 encoding for a hash struct in this EIP712 Domain. + /// @param hashStruct The EIP712 hash struct. + /// @return EIP712 hash applied to this EIP712 Domain. + function hashEIP712Message(bytes32 hashStruct) + internal + view + returns (bytes32) + { + return keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, hashStruct)); + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol new file mode 100644 index 000000000..01aa78a1d --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol @@ -0,0 +1,68 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +/// @dev This contract documents the revert reasons used in the Exchange contract. +/// This contract is intended to serve as a reference, but is not actually used for efficiency reasons. +contract LibExchangeErrors { + + /// Order validation errors /// + string constant ORDER_UNFILLABLE = "ORDER_UNFILLABLE"; // Order cannot be filled. + string constant INVALID_MAKER = "INVALID_MAKER"; // Invalid makerAddress. + string constant INVALID_TAKER = "INVALID_TAKER"; // Invalid takerAddress. + string constant INVALID_SENDER = "INVALID_SENDER"; // Invalid `msg.sender`. + string constant INVALID_ORDER_SIGNATURE = "INVALID_ORDER_SIGNATURE"; // Signature validation failed. + + /// fillOrder validation errors /// + string constant INVALID_TAKER_AMOUNT = "INVALID_TAKER_AMOUNT"; // takerAssetFillAmount cannot equal 0. + string constant ROUNDING_ERROR = "ROUNDING_ERROR"; // Rounding error greater than 0.1% of takerAssetFillAmount. + + /// Signature validation errors /// + string constant INVALID_SIGNATURE = "INVALID_SIGNATURE"; // Signature validation failed. + string constant SIGNATURE_ILLEGAL = "SIGNATURE_ILLEGAL"; // Signature type is illegal. + string constant SIGNATURE_UNSUPPORTED = "SIGNATURE_UNSUPPORTED"; // Signature type unsupported. + + /// cancelOrdersUptTo errors /// + string constant INVALID_NEW_ORDER_EPOCH = "INVALID_NEW_ORDER_EPOCH"; // Specified salt must be greater than or equal to existing orderEpoch. + + /// fillOrKillOrder errors /// + string constant COMPLETE_FILL_FAILED = "COMPLETE_FILL_FAILED"; // Desired takerAssetFillAmount could not be completely filled. + + /// matchOrders errors /// + string constant NEGATIVE_SPREAD_REQUIRED = "NEGATIVE_SPREAD_REQUIRED"; // Matched orders must have a negative spread. + + /// Transaction errors /// + string constant REENTRANCY_ILLEGAL = "REENTRANCY_ILLEGAL"; // Recursive reentrancy is not allowed. + string constant INVALID_TX_HASH = "INVALID_TX_HASH"; // Transaction has already been executed. + string constant INVALID_TX_SIGNATURE = "INVALID_TX_SIGNATURE"; // Signature validation failed. + string constant FAILED_EXECUTION = "FAILED_EXECUTION"; // Transaction execution failed. + + /// registerAssetProxy errors /// + string constant ASSET_PROXY_ALREADY_EXISTS = "ASSET_PROXY_ALREADY_EXISTS"; // AssetProxy with same id already exists. + + /// dispatchTransferFrom errors /// + string constant ASSET_PROXY_DOES_NOT_EXIST = "ASSET_PROXY_DOES_NOT_EXIST"; // No assetProxy registered at given id. + string constant TRANSFER_FAILED = "TRANSFER_FAILED"; // Asset transfer unsuccesful. + + /// Length validation errors /// + string constant LENGTH_GREATER_THAN_0_REQUIRED = "LENGTH_GREATER_THAN_0_REQUIRED"; // Byte array must have a length greater than 0. + string constant LENGTH_GREATER_THAN_3_REQUIRED = "LENGTH_GREATER_THAN_3_REQUIRED"; // Byte array must have a length greater than 3. + string constant LENGTH_0_REQUIRED = "LENGTH_0_REQUIRED"; // Byte array must have a length of 0. + string constant LENGTH_65_REQUIRED = "LENGTH_65_REQUIRED"; // Byte array must have a length of 65. +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol new file mode 100644 index 000000000..63f1b8c87 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol @@ -0,0 +1,53 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../../utils/SafeMath/SafeMath.sol"; + +contract LibFillResults is + SafeMath +{ + + struct FillResults { + uint256 makerAssetFilledAmount; // Total amount of makerAsset(s) filled. + uint256 takerAssetFilledAmount; // Total amount of takerAsset(s) filled. + uint256 makerFeePaid; // Total amount of ZRX paid by maker(s) to feeRecipient(s). + uint256 takerFeePaid; // Total amount of ZRX paid by taker to feeRecipients(s). + } + + struct MatchedFillResults { + FillResults left; // Amounts filled and fees paid of left order. + FillResults right; // Amounts filled and fees paid of right order. + uint256 leftMakerAssetSpreadAmount; // Spread between price of left and right order, denominated in the left order's makerAsset, paid to taker. + } + + /// @dev Adds properties of both FillResults instances. + /// Modifies the first FillResults instance specified. + /// @param totalFillResults Fill results instance that will be added onto. + /// @param singleFillResults Fill results instance that will be added to totalFillResults. + function addFillResults(FillResults memory totalFillResults, FillResults memory singleFillResults) + internal + pure + { + totalFillResults.makerAssetFilledAmount = safeAdd(totalFillResults.makerAssetFilledAmount, singleFillResults.makerAssetFilledAmount); + totalFillResults.takerAssetFilledAmount = safeAdd(totalFillResults.takerAssetFilledAmount, singleFillResults.takerAssetFilledAmount); + totalFillResults.makerFeePaid = safeAdd(totalFillResults.makerFeePaid, singleFillResults.makerFeePaid); + totalFillResults.takerFeePaid = safeAdd(totalFillResults.takerFeePaid, singleFillResults.takerFeePaid); + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol new file mode 100644 index 000000000..bfe2fd33f --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol @@ -0,0 +1,72 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../../utils/SafeMath/SafeMath.sol"; + +contract LibMath is + SafeMath +{ + + /// @dev Calculates partial value given a numerator and denominator. + /// @param numerator Numerator. + /// @param denominator Denominator. + /// @param target Value to calculate partial of. + /// @return Partial value of target. + function getPartialAmount( + uint256 numerator, + uint256 denominator, + uint256 target) + internal + pure + returns (uint256 partialAmount) + { + partialAmount = safeDiv( + safeMul(numerator, target), + denominator + ); + return partialAmount; + } + + /// @dev Checks if rounding error > 0.1%. + /// @param numerator Numerator. + /// @param denominator Denominator. + /// @param target Value to multiply with numerator/denominator. + /// @return Rounding error is present. + function isRoundingError( + uint256 numerator, + uint256 denominator, + uint256 target) + internal + pure + returns (bool isError) + { + uint256 remainder = mulmod(target, numerator, denominator); + if (remainder == 0) { + return false; // No rounding error. + } + + uint256 errPercentageTimes1000000 = safeDiv( + safeMul(remainder, 1000000), + safeMul(numerator, target) + ); + isError = errPercentageTimes1000000 > 1000; + return isError; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol new file mode 100644 index 000000000..954f94f76 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol @@ -0,0 +1,135 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "./LibEIP712.sol"; + +contract LibOrder is + LibEIP712 +{ + + // Hash for the EIP712 Order Schema + bytes32 constant EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked( + "Order(", + "address makerAddress,", + "address takerAddress,", + "address feeRecipientAddress,", + "address senderAddress,", + "uint256 makerAssetAmount,", + "uint256 takerAssetAmount,", + "uint256 makerFee,", + "uint256 takerFee,", + "uint256 expirationTimeSeconds,", + "uint256 salt,", + "bytes makerAssetData,", + "bytes takerAssetData", + ")" + )); + + // A valid order remains fillable until it is expired, fully filled, or cancelled. + // An order's state is unaffected by external factors, like account balances. + enum OrderStatus { + INVALID, // Default value + INVALID_MAKER_ASSET_AMOUNT, // Order does not have a valid maker asset amount + INVALID_TAKER_ASSET_AMOUNT, // Order does not have a valid taker asset amount + FILLABLE, // Order is fillable + EXPIRED, // Order has already expired + FULLY_FILLED, // Order is fully filled + CANCELLED // Order has been cancelled + } + + struct Order { + address makerAddress; // Address that created the order. + address takerAddress; // Address that is allowed to fill the order. If set to 0, any address is allowed to fill the order. + address feeRecipientAddress; // Address that will recieve fees when order is filled. + address senderAddress; // Address that is allowed to call Exchange contract methods that affect this order. If set to 0, any address is allowed to call these methods. + uint256 makerAssetAmount; // Amount of makerAsset being offered by maker. Must be greater than 0. + uint256 takerAssetAmount; // Amount of takerAsset being bid on by maker. Must be greater than 0. + uint256 makerFee; // Amount of ZRX paid to feeRecipient by maker when order is filled. If set to 0, no transfer of ZRX from maker to feeRecipient will be attempted. + uint256 takerFee; // Amount of ZRX paid to feeRecipient by taker when order is filled. If set to 0, no transfer of ZRX from taker to feeRecipient will be attempted. + uint256 expirationTimeSeconds; // Timestamp in seconds at which order expires. + uint256 salt; // Arbitrary number to facilitate uniqueness of the order's hash. + bytes makerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring makerAsset. The last byte references the id of this proxy. + bytes takerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring takerAsset. The last byte references the id of this proxy. + } + + struct OrderInfo { + uint8 orderStatus; // Status that describes order's validity and fillability. + bytes32 orderHash; // EIP712 hash of the order (see LibOrder.getOrderHash). + uint256 orderTakerAssetFilledAmount; // Amount of order that has already been filled. + } + + /// @dev Calculates Keccak-256 hash of the order. + /// @param order The order structure. + /// @return Keccak-256 EIP712 hash of the order. + function getOrderHash(Order memory order) + internal + view + returns (bytes32 orderHash) + { + orderHash = hashEIP712Message(hashOrder(order)); + return orderHash; + } + + /// @dev Calculates EIP712 hash of the order. + /// @param order The order structure. + /// @return EIP712 hash of the order. + function hashOrder(Order memory order) + internal + pure + returns (bytes32 result) + { + bytes32 schemaHash = EIP712_ORDER_SCHEMA_HASH; + bytes32 makerAssetDataHash = keccak256(order.makerAssetData); + bytes32 takerAssetDataHash = keccak256(order.takerAssetData); + // Assembly for more efficiently computing: + // keccak256(abi.encode( + // order.makerAddress, + // order.takerAddress, + // order.feeRecipientAddress, + // order.senderAddress, + // order.makerAssetAmount, + // order.takerAssetAmount, + // order.makerFee, + // order.takerFee, + // order.expirationTimeSeconds, + // order.salt, + // keccak256(order.makerAssetData), + // keccak256(order.takerAssetData) + // )); + assembly { + // Backup + let temp1 := mload(sub(order, 32)) + let temp2 := mload(add(order, 320)) + let temp3 := mload(add(order, 352)) + + // Hash in place + mstore(sub(order, 32), schemaHash) + mstore(add(order, 320), makerAssetDataHash) + mstore(add(order, 352), takerAssetDataHash) + result := keccak256(sub(order, 32), 416) + + // Restore + mstore(sub(order, 32), temp1) + mstore(add(order, 320), temp2) + mstore(add(order, 352), temp3) + } + return result; + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol new file mode 100644 index 000000000..5bf59c6ce --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol @@ -0,0 +1,46 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../interfaces/IAssetProxyDispatcher.sol"; + +contract MAssetProxyDispatcher is + IAssetProxyDispatcher +{ + + // Logs registration of new asset proxy + event AssetProxyRegistered( + bytes4 id, // Id of new registered AssetProxy. + address assetProxy // Address of new registered AssetProxy. + ); + + /// @dev Forwards arguments to assetProxy and calls `transferFrom`. Either succeeds or throws. + /// @param assetData Byte array encoded for the asset. + /// @param from Address to transfer token from. + /// @param to Address to transfer token to. + /// @param amount Amount of token to transfer. + function dispatchTransferFrom( + bytes memory assetData, + address from, + address to, + uint256 amount + ) + internal; +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol new file mode 100644 index 000000000..6e406e1c4 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol @@ -0,0 +1,127 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; +import "../interfaces/IExchangeCore.sol"; + +contract MExchangeCore is + IExchangeCore +{ + // Fill event is emitted whenever an order is filled. + event Fill( + address indexed makerAddress, // Address that created the order. + address indexed feeRecipientAddress, // Address that received fees. + address takerAddress, // Address that filled the order. + address senderAddress, // Address that called the Exchange contract (msg.sender). + uint256 makerAssetFilledAmount, // Amount of makerAsset sold by maker and bought by taker. + uint256 takerAssetFilledAmount, // Amount of takerAsset sold by taker and bought by maker. + uint256 makerFeePaid, // Amount of ZRX paid to feeRecipient by maker. + uint256 takerFeePaid, // Amount of ZRX paid to feeRecipient by taker. + bytes32 indexed orderHash, // EIP712 hash of order (see LibOrder.getOrderHash). + bytes makerAssetData, // Encoded data specific to makerAsset. + bytes takerAssetData // Encoded data specific to takerAsset. + ); + + // Cancel event is emitted whenever an individual order is cancelled. + event Cancel( + address indexed makerAddress, // Address that created the order. + address indexed feeRecipientAddress, // Address that would have recieved fees if order was filled. + address senderAddress, // Address that called the Exchange contract (msg.sender). + bytes32 indexed orderHash, // EIP712 hash of order (see LibOrder.getOrderHash). + bytes makerAssetData, // Encoded data specific to makerAsset. + bytes takerAssetData // Encoded data specific to takerAsset. + ); + + // CancelUpTo event is emitted whenever `cancelOrdersUpTo` is executed succesfully. + event CancelUpTo( + address indexed makerAddress, // Orders cancelled must have been created by this address. + address indexed senderAddress, // Orders cancelled must have a `senderAddress` equal to this address. + uint256 orderEpoch // Orders specified makerAddress and senderAddress with a salt <= this value are considered cancelled. + ); + + /// @dev Updates state with results of a fill order. + /// @param order that was filled. + /// @param takerAddress Address of taker who filled the order. + /// @param orderTakerAssetFilledAmount Amount of order already filled. + /// @return fillResults Amounts filled and fees paid by maker and taker. + function updateFilledState( + LibOrder.Order memory order, + address takerAddress, + bytes32 orderHash, + uint256 orderTakerAssetFilledAmount, + LibFillResults.FillResults memory fillResults + ) + internal; + + /// @dev Updates state with results of cancelling an order. + /// State is only updated if the order is currently fillable. + /// Otherwise, updating state would have no effect. + /// @param order that was cancelled. + /// @param orderHash Hash of order that was cancelled. + function updateCancelledState( + LibOrder.Order memory order, + bytes32 orderHash + ) + internal; + + /// @dev Validates context for fillOrder. Succeeds or throws. + /// @param order to be filled. + /// @param orderInfo Status, orderHash, and amount already filled of order. + /// @param takerAddress Address of order taker. + /// @param takerAssetFillAmount Desired amount of order to fill by taker. + /// @param takerAssetFilledAmount Amount of takerAsset that will be filled. + /// @param signature Proof that the orders was created by its maker. + function assertValidFill( + LibOrder.Order memory order, + LibOrder.OrderInfo memory orderInfo, + address takerAddress, + uint256 takerAssetFillAmount, + uint256 takerAssetFilledAmount, + bytes memory signature + ) + internal + view; + + + /// @dev Validates context for cancelOrder. Succeeds or throws. + /// @param order to be cancelled. + /// @param orderInfo OrderStatus, orderHash, and amount already filled of order. + function assertValidCancel( + LibOrder.Order memory order, + LibOrder.OrderInfo memory orderInfo + ) + internal + view; + + /// @dev Calculates amounts filled and fees paid by maker and taker. + /// @param order to be filled. + /// @param takerAssetFilledAmount Amount of takerAsset that will be filled. + /// @return fillResults Amounts filled and fees paid by maker and taker. + function calculateFillResults( + LibOrder.Order memory order, + uint256 takerAssetFilledAmount + ) + internal + pure + returns (LibFillResults.FillResults memory fillResults); + +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol new file mode 100644 index 000000000..abe7c3596 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol @@ -0,0 +1,58 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; +import "../interfaces/IMatchOrders.sol"; + +contract MMatchOrders is + IMatchOrders +{ + + /// @dev Validates context for matchOrders. Succeeds or throws. + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + function assertValidMatch( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder + ) + internal + pure; + + /// @dev Calculates fill amounts for the matched orders. + /// Each order is filled at their respective price point. However, the calculations are + /// carried out as though the orders are both being filled at the right order's price point. + /// The profit made by the leftOrder order goes to the taker (who matched the two orders). + /// @param leftOrder First order to match. + /// @param rightOrder Second order to match. + /// @param leftOrderTakerAssetFilledAmount Amount of left order already filled. + /// @param rightOrderTakerAssetFilledAmount Amount of right order already filled. + /// @param matchedFillResults Amounts to fill and fees to pay by maker and taker of matched orders. + function calculateMatchedFillResults( + LibOrder.Order memory leftOrder, + LibOrder.Order memory rightOrder, + uint256 leftOrderTakerAssetFilledAmount, + uint256 rightOrderTakerAssetFilledAmount + ) + internal + pure + returns (LibFillResults.MatchedFillResults memory matchedFillResults); + +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol new file mode 100644 index 000000000..6cc1d7a10 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol @@ -0,0 +1,45 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../interfaces/ISignatureValidator.sol"; + +contract MSignatureValidator is + ISignatureValidator +{ + event SignatureValidatorApproval( + address indexed signerAddress, // Address that approves or disapproves a contract to verify signatures. + address indexed validatorAddress, // Address of signature validator contract. + bool approved // Approval or disapproval of validator contract. + ); + + // Allowed signature types. + enum SignatureType { + Illegal, // 0x00, default value + Invalid, // 0x01 + EIP712, // 0x02 + EthSign, // 0x03 + Caller, // 0x04 + Wallet, // 0x05 + Validator, // 0x06 + PreSigned, // 0x07 + Trezor, // 0x08 + NSignatureTypes // 0x09, number of signature types. Always leave at end. + } +} diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol new file mode 100644 index 000000000..e2f89de01 --- /dev/null +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol @@ -0,0 +1,35 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ +pragma solidity ^0.4.24; + +import "../interfaces/ITransactions.sol"; + +contract MTransactions is + ITransactions +{ + + /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`). + /// If calling a fill function, this address will represent the taker. + /// If calling a cancel function, this address will represent the maker. + /// @return Signer of 0x transaction if entry point is `executeTransaction`. + /// `msg.sender` if entry point is any other function. + function getCurrentContextAddress() + internal + view + returns (address); +} diff --git a/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol b/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol new file mode 100644 index 000000000..b2fe2df06 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol @@ -0,0 +1,57 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../Mintable/Mintable.sol"; +import "../../utils/Ownable/Ownable.sol"; + +contract DummyERC20Token is Mintable, Ownable { + string public name; + string public symbol; + uint256 public decimals; + + constructor ( + string _name, + string _symbol, + uint256 _decimals, + uint256 _totalSupply + ) + public + { + name = _name; + symbol = _symbol; + decimals = _decimals; + totalSupply = _totalSupply; + balances[msg.sender] = _totalSupply; + } + + function setBalance(address _target, uint256 _value) + public + onlyOwner + { + uint256 currBalance = balanceOf(_target); + if (_value < currBalance) { + totalSupply = safeSub(totalSupply, safeSub(currBalance, _value)); + } else { + totalSupply = safeAdd(totalSupply, safeSub(_value, currBalance)); + } + balances[_target] = _value; + } +} diff --git a/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol b/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol new file mode 100644 index 000000000..c584d0b54 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol @@ -0,0 +1,63 @@ +/* +The MIT License (MIT) + +Copyright (c) 2016 Smart Contract Solutions, Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +pragma solidity ^0.4.24; + +import "../../tokens/ERC721Token/IERC721Receiver.sol"; + +contract DummyERC721Receiver is + IERC721Receiver +{ + + event TokenReceived( + address from, + uint256 tokenId, + bytes data + ); + + /** + * @notice Handle the receipt of an NFT + * @dev The ERC721 smart contract calls this function on the recipient + * after a `safetransfer`. This function MAY throw to revert and reject the + * transfer. This function MUST use 50,000 gas or less. Return of other + * than the magic value MUST result in the transaction being reverted. + * Note: the contract address is always the message sender. + * @param _from The sending address + * @param _tokenId The NFT identifier which is being transfered + * @param _data Additional data with no specified format + * @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` + */ + function onERC721Received( + address _from, + uint256 _tokenId, + bytes _data + ) + public + returns (bytes4) + { + emit TokenReceived(_from, _tokenId, _data); + return ERC721_RECEIVED; + } +} diff --git a/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol b/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol new file mode 100644 index 000000000..78ea96447 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol @@ -0,0 +1,75 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../tokens/ERC721Token/ERC721Token.sol"; +import "../../utils/Ownable/Ownable.sol"; + +contract DummyERC721Token is + Ownable, + ERC721Token +{ + + /** + * @dev Constructor passes its arguments to the base ERC721Token constructor + * @param name of token + * @param symbol of token + */ + constructor ( + string name, + string symbol + ) + public + ERC721Token(name, symbol) + {} + + /** + * @dev Function to mint a new token + * @dev Reverts if the given token ID already exists + * @param to address the beneficiary that will own the minted token + * @param tokenId uint256 ID of the token to be minted by the msg.sender + */ + function mint(address to, uint256 tokenId) + public + onlyOwner + { + require( + !exists(tokenId), + "Token with tokenId already exists." + ); + _mint(to, tokenId); + } + + /** + * @dev Function to burn a token + * @dev Reverts if the given token ID doesn't exist + * @param tokenId uint256 ID of the token to be minted by the msg.sender + */ + function burn(address owner, uint256 tokenId) + public + onlyOwner + { + require( + exists(tokenId), + "Token with tokenId does not exist." + ); + _burn(owner, tokenId); + } +} diff --git a/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol b/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol new file mode 100644 index 000000000..5baaf6e5a --- /dev/null +++ b/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol @@ -0,0 +1,98 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../protocol/Exchange/interfaces/IExchange.sol"; +import "../../protocol/Exchange/libs/LibOrder.sol"; + +contract ExchangeWrapper { + + // Exchange contract. + IExchange EXCHANGE; + + constructor (address _exchange) + public + { + EXCHANGE = IExchange(_exchange); + } + + /// @dev Fills an order using `msg.sender` as the taker. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param salt Arbitrary value to gaurantee uniqueness of 0x transaction hash. + /// @param orderSignature Proof that order has been created by maker. + /// @param takerSignature Proof that taker wishes to call this function with given params. + function fillOrder( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + uint256 salt, + bytes memory orderSignature, + bytes memory takerSignature + ) + public + { + address takerAddress = msg.sender; + + // Encode arguments into byte array. + bytes memory data = abi.encodeWithSelector( + EXCHANGE.fillOrder.selector, + order, + takerAssetFillAmount, + orderSignature + ); + + // Call `fillOrder` via `executeTransaction`. + EXCHANGE.executeTransaction( + salt, + takerAddress, + data, + takerSignature + ); + } + + /// @dev Cancels all orders created by sender with a salt less than or equal to the targetOrderEpoch + /// and senderAddress equal to this contract. + /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled. + /// @param salt Arbitrary value to gaurantee uniqueness of 0x transaction hash. + /// @param makerSignature Proof that maker wishes to call this function with given params. + function cancelOrdersUpTo( + uint256 targetOrderEpoch, + uint256 salt, + bytes makerSignature + ) + external + { + address makerAddress = msg.sender; + + // Encode arguments into byte array. + bytes memory data = abi.encodeWithSelector( + EXCHANGE.cancelOrdersUpTo.selector, + targetOrderEpoch + ); + + // Call `cancelOrdersUpTo` via `executeTransaction`. + EXCHANGE.executeTransaction( + salt, + makerAddress, + data, + makerSignature + ); + } +} diff --git a/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol b/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol new file mode 100644 index 000000000..a91bfee9e --- /dev/null +++ b/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol @@ -0,0 +1,40 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol"; +import "../../utils/SafeMath/SafeMath.sol"; + +/* + * Mintable + * Base contract that creates a mintable UnlimitedAllowanceToken + */ +contract Mintable is UnlimitedAllowanceToken, SafeMath { + function mint(uint256 _value) + public + { + require( + _value <= 100000000000000000000, + "Minting more than 100000000000000000000 is not allowed." + ); + balances[msg.sender] = safeAdd(_value, balances[msg.sender]); + totalSupply = safeAdd(totalSupply, _value); + } +} diff --git a/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol new file mode 100644 index 000000000..2ae69e0ef --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol @@ -0,0 +1,34 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../protocol/Exchange/MixinAssetProxyDispatcher.sol"; + +contract TestAssetProxyDispatcher is MixinAssetProxyDispatcher { + function publicDispatchTransferFrom( + bytes memory assetData, + address from, + address to, + uint256 amount) + public + { + dispatchTransferFrom(assetData, from, to, amount); + } +} diff --git a/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol b/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol new file mode 100644 index 000000000..2abcd17a0 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol @@ -0,0 +1,56 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../protocol/AssetProxyOwner/AssetProxyOwner.sol"; + +contract TestAssetProxyOwner is + AssetProxyOwner +{ + constructor( + address[] memory _owners, + address[] memory _assetProxyContracts, + uint256 _required, + uint256 _secondsTimeLocked + ) + public + AssetProxyOwner(_owners, _assetProxyContracts, _required, _secondsTimeLocked) + { + } + + function testValidRemoveAuthorizedAddressAtIndexTx(uint256 id) + public + validRemoveAuthorizedAddressAtIndexTx(id) + returns (bool) + { + // Do nothing. We expect reverts through the modifier + return true; + } + + /// @dev Compares first 4 bytes of byte array to `removeAuthorizedAddressAtIndex` function selector. + /// @param data Transaction data. + /// @return Successful if data is a call to `removeAuthorizedAddressAtIndex`. + function isFunctionRemoveAuthorizedAddressAtIndex(bytes memory data) + public + pure + returns (bool) + { + return data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR; + } +} diff --git a/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol b/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol new file mode 100644 index 000000000..f45faaf36 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol @@ -0,0 +1,269 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../utils/LibBytes/LibBytes.sol"; + +contract TestLibBytes { + + using LibBytes for bytes; + + /// @dev Pops the last byte off of a byte array by modifying its length. + /// @param b Byte array that will be modified. + /// @return The byte that was popped off. + function publicPopLastByte(bytes memory b) + public + pure + returns (bytes memory, bytes1 result) + { + result = b.popLastByte(); + return (b, result); + } + + /// @dev Pops the last 20 bytes off of a byte array by modifying its length. + /// @param b Byte array that will be modified. + /// @return The 20 byte address that was popped off. + function publicPopLast20Bytes(bytes memory b) + public + pure + returns (bytes memory, address result) + { + result = b.popLast20Bytes(); + return (b, result); + } + + /// @dev Tests equality of two byte arrays. + /// @param lhs First byte array to compare. + /// @param rhs Second byte array to compare. + /// @return True if arrays are the same. False otherwise. + function publicEquals(bytes memory lhs, bytes memory rhs) + public + pure + returns (bool equal) + { + equal = lhs.equals(rhs); + return equal; + } + + function publicEqualsPop1(bytes memory lhs, bytes memory rhs) + public + pure + returns (bool equal) + { + lhs.popLastByte(); + rhs.popLastByte(); + equal = lhs.equals(rhs); + return equal; + } + + /// @dev Performs a deep copy of a byte array onto another byte array of greater than or equal length. + /// @param dest Byte array that will be overwritten with source bytes. + /// @param source Byte array to copy onto dest bytes. + function publicDeepCopyBytes( + bytes memory dest, + bytes memory source + ) + public + pure + returns (bytes memory) + { + LibBytes.deepCopyBytes(dest, source); + return dest; + } + + /// @dev Reads an address from a position in a byte array. + /// @param b Byte array containing an address. + /// @param index Index in byte array of address. + /// @return address from byte array. + function publicReadAddress( + bytes memory b, + uint256 index + ) + public + pure + returns (address result) + { + result = b.readAddress(index); + return result; + } + + /// @dev Writes an address into a specific position in a byte array. + /// @param b Byte array to insert address into. + /// @param index Index in byte array of address. + /// @param input Address to put into byte array. + function publicWriteAddress( + bytes memory b, + uint256 index, + address input + ) + public + pure + returns (bytes memory) + { + b.writeAddress(index, input); + return b; + } + + /// @dev Reads a bytes32 value from a position in a byte array. + /// @param b Byte array containing a bytes32 value. + /// @param index Index in byte array of bytes32 value. + /// @return bytes32 value from byte array. + function publicReadBytes32( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes32 result) + { + result = b.readBytes32(index); + return result; + } + + /// @dev Writes a bytes32 into a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input bytes32 to put into byte array. + function publicWriteBytes32( + bytes memory b, + uint256 index, + bytes32 input + ) + public + pure + returns (bytes memory) + { + b.writeBytes32(index, input); + return b; + } + + /// @dev Reads a uint256 value from a position in a byte array. + /// @param b Byte array containing a uint256 value. + /// @param index Index in byte array of uint256 value. + /// @return uint256 value from byte array. + function publicReadUint256( + bytes memory b, + uint256 index + ) + public + pure + returns (uint256 result) + { + result = b.readUint256(index); + return result; + } + + /// @dev Writes a uint256 into a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input uint256 to put into byte array. + function publicWriteUint256( + bytes memory b, + uint256 index, + uint256 input + ) + public + pure + returns (bytes memory) + { + b.writeUint256(index, input); + return b; + } + + /// @dev Reads an unpadded bytes4 value from a position in a byte array. + /// @param b Byte array containing a bytes4 value. + /// @param index Index in byte array of bytes4 value. + /// @return bytes4 value from byte array. + function publicReadBytes4( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes4 result) + { + result = b.readBytes4(index); + return result; + } + + /// @dev Reads nested bytes from a specific position. + /// @param b Byte array containing nested bytes. + /// @param index Index of nested bytes. + /// @return result Nested bytes. + function publicReadBytesWithLength( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes memory result) + { + result = b.readBytesWithLength(index); + return result; + } + + /// @dev Inserts bytes at a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input bytes to insert. + /// @return b Updated input byte array + function publicWriteBytesWithLength( + bytes memory b, + uint256 index, + bytes memory input + ) + public + pure + returns (bytes memory) + { + b.writeBytesWithLength(index, input); + return b; + } + + /// @dev Copies a block of memory from one location to another. + /// @param mem Memory contents we want to apply memCopy to + /// @param dest Destination offset into <mem>. + /// @param source Source offset into <mem>. + /// @param length Length of bytes to copy from <source> to <dest> + /// @return mem Memory contents after calling memCopy. + function testMemcpy( + bytes mem, + uint256 dest, + uint256 source, + uint256 length + ) + public // not external, we need input in memory + pure + returns (bytes) + { + // Sanity check. Overflows are not checked. + require(source + length <= mem.length); + require(dest + length <= mem.length); + + // Get pointer to memory contents + uint256 offset = mem.contentAddress(); + + // Execute memCopy adjusted for memory array location + LibBytes.memCopy(offset + dest, offset + source, length); + + // Return modified memory contents + return mem; + } +} diff --git a/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol b/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol new file mode 100644 index 000000000..010080703 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol @@ -0,0 +1,96 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../protocol/Exchange/libs/LibMath.sol"; +import "../../protocol/Exchange/libs/LibOrder.sol"; +import "../../protocol/Exchange/libs/LibFillResults.sol"; + +contract TestLibs is + LibMath, + LibOrder, + LibFillResults +{ + function publicGetPartialAmount( + uint256 numerator, + uint256 denominator, + uint256 target) + public + pure + returns (uint256 partialAmount) + { + partialAmount = getPartialAmount( + numerator, + denominator, + target + ); + return partialAmount; + } + + function publicIsRoundingError( + uint256 numerator, + uint256 denominator, + uint256 target) + public + pure + returns (bool isError) + { + isError = isRoundingError( + numerator, + denominator, + target + ); + return isError; + } + + function publicGetOrderHash(Order memory order) + public + view + returns (bytes32 orderHash) + { + orderHash = getOrderHash(order); + return orderHash; + } + + function getOrderSchemaHash() + public + pure + returns (bytes32) + { + return EIP712_ORDER_SCHEMA_HASH; + } + + function getDomainSeparatorSchemaHash() + public + pure + returns (bytes32) + { + return EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH; + } + + function publicAddFillResults(FillResults memory totalFillResults, FillResults memory singleFillResults) + public + pure + returns (FillResults memory) + { + addFillResults(totalFillResults, singleFillResults); + return totalFillResults; + } +} diff --git a/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol b/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol new file mode 100644 index 000000000..0f84678cf --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol @@ -0,0 +1,46 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../protocol/Exchange/MixinSignatureValidator.sol"; +import "../../protocol/Exchange/MixinTransactions.sol"; + +contract TestSignatureValidator is + MixinSignatureValidator, + MixinTransactions +{ + + function publicIsValidSignature( + bytes32 hash, + address signer, + bytes memory signature + ) + public + view + returns (bool isValid) + { + isValid = isValidSignature( + hash, + signer, + signature + ); + return isValid; + } +} diff --git a/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol b/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol new file mode 100644 index 000000000..f9271bf7a --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol @@ -0,0 +1,52 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../protocol/Exchange/interfaces/IValidator.sol"; + +contract TestValidator is + IValidator +{ + + // The single valid signer for this wallet. + address VALID_SIGNER; + + /// @dev constructs a new `TestValidator` with a single valid signer. + /// @param validSigner The sole, valid signer. + constructor (address validSigner) public { + VALID_SIGNER = validSigner; + } + + /// @dev Verifies that a signature is valid. `signer` must match `VALID_SIGNER`. + /// @param hash Message hash that is signed. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof of signing. + /// @return Validity of signature. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes signature + ) + external + view + returns (bool isValid) + { + return (signerAddress == VALID_SIGNER); + } +} diff --git a/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol b/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol new file mode 100644 index 000000000..17dee9e9c --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol @@ -0,0 +1,65 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +import "../../protocol/Exchange/interfaces/IWallet.sol"; +import "../../utils/LibBytes/LibBytes.sol"; + +contract TestWallet is + IWallet +{ + using LibBytes for bytes; + + string constant LENGTH_65_REQUIRED = "LENGTH_65_REQUIRED"; + + // The owner of this wallet. + address WALLET_OWNER; + + /// @dev constructs a new `TestWallet` with a single owner. + /// @param walletOwner The owner of this wallet. + constructor (address walletOwner) public { + WALLET_OWNER = walletOwner; + } + + /// @dev Validates an EIP712 signature. + /// The signer must match the owner of this wallet. + /// @param hash Message hash that is signed. + /// @param eip712Signature Proof of signing. + /// @return Validity of signature. + function isValidSignature( + bytes32 hash, + bytes eip712Signature + ) + external + view + returns (bool isValid) + { + require( + eip712Signature.length == 65, + LENGTH_65_REQUIRED + ); + + uint8 v = uint8(eip712Signature[0]); + bytes32 r = eip712Signature.readBytes32(1); + bytes32 s = eip712Signature.readBytes32(33); + address recoveredAddress = ecrecover(hash, v, r, s); + isValid = WALLET_OWNER == recoveredAddress; + return isValid; + } +} diff --git a/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol b/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol new file mode 100644 index 000000000..8b52858b1 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol @@ -0,0 +1,133 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../../protocol/Exchange/interfaces/IExchange.sol"; +import "../../protocol/Exchange/libs/LibOrder.sol"; +import "../../utils/Ownable/Ownable.sol"; + +contract Whitelist is + Ownable +{ + // Revert reasons + string constant MAKER_NOT_WHITELISTED = "MAKER_NOT_WHITELISTED"; // Maker address not whitelisted. + string constant TAKER_NOT_WHITELISTED = "TAKER_NOT_WHITELISTED"; // Taker address not whitelisted. + string constant INVALID_SENDER = "INVALID_SENDER"; // Sender must equal transaction origin. + + // Mapping of address => whitelist status. + mapping (address => bool) public isWhitelisted; + + // Exchange contract. + IExchange EXCHANGE; + + byte constant VALIDATOR_SIGNATURE_BYTE = "\x06"; + bytes TX_ORIGIN_SIGNATURE; + + constructor (address _exchange) + public + { + EXCHANGE = IExchange(_exchange); + TX_ORIGIN_SIGNATURE = abi.encodePacked(address(this), VALIDATOR_SIGNATURE_BYTE); + } + + /// @dev Adds or removes an address from the whitelist. + /// @param target Address to add or remove from whitelist. + /// @param isApproved Whitelist status to assign to address. + function updateWhitelistStatus( + address target, + bool isApproved + ) + external + onlyOwner + { + isWhitelisted[target] = isApproved; + } + + /// @dev Fills an order using `msg.sender` as the taker. + /// The transaction will revert if both the maker and taker are not whitelisted. + /// Orders should specify this contract as the `senderAddress` in order to gaurantee + /// that both maker and taker have been whitelisted. + /// @param order Order struct containing order specifications. + /// @param takerAssetFillAmount Desired amount of takerAsset to sell. + /// @param salt Arbitrary value to gaurantee uniqueness of 0x transaction hash. + /// @param orderSignature Proof that order has been created by maker. + function fillOrderIfWhitelisted( + LibOrder.Order memory order, + uint256 takerAssetFillAmount, + uint256 salt, + bytes memory orderSignature + ) + public + { + address takerAddress = msg.sender; + + // This contract must be the entry point for the transaction. + require( + takerAddress == tx.origin, + INVALID_SENDER + ); + + // Check if maker is on the whitelist. + require( + isWhitelisted[order.makerAddress], + MAKER_NOT_WHITELISTED + ); + + // Check if taker is on the whitelist. + require( + isWhitelisted[takerAddress], + TAKER_NOT_WHITELISTED + ); + + // Encode arguments into byte array. + bytes memory data = abi.encodeWithSelector( + EXCHANGE.fillOrder.selector, + order, + takerAssetFillAmount, + orderSignature + ); + + // Call `fillOrder` via `executeTransaction`. + EXCHANGE.executeTransaction( + salt, + takerAddress, + data, + TX_ORIGIN_SIGNATURE + ); + } + + /// @dev Verifies signer is same as signer of current Ethereum transaction. + /// NOTE: This function can currently be used to validate signatures coming from outside of this contract. + /// Extra safety checks can be added for a production contract. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes signature + ) + external + view + returns (bool isValid) + { + return signerAddress == tx.origin; + } +} diff --git a/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol b/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol new file mode 100644 index 000000000..b6961a6ec --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol @@ -0,0 +1,99 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "./IERC20Token.sol"; + +contract ERC20Token is IERC20Token { + + string constant INSUFFICIENT_BALANCE = "ERC20_INSUFFICIENT_BALANCE"; + string constant INSUFFICIENT_ALLOWANCE = "ERC20_INSUFFICIENT_ALLOWANCE"; + string constant OVERFLOW = "Transfer would result in an overflow."; + + mapping (address => uint256) balances; + mapping (address => mapping (address => uint256)) allowed; + + uint256 public totalSupply; + + function transfer(address _to, uint256 _value) + public + returns (bool) + { + require( + balances[msg.sender] >= _value, + INSUFFICIENT_BALANCE + ); + require( + balances[_to] + _value >= balances[_to], + OVERFLOW + ); + balances[msg.sender] -= _value; + balances[_to] += _value; + emit Transfer(msg.sender, _to, _value); + return true; + } + + function transferFrom(address _from, address _to, uint256 _value) + public + returns (bool) + { + require( + balances[_from] >= _value, + INSUFFICIENT_BALANCE + ); + require( + allowed[_from][msg.sender] >= _value, + INSUFFICIENT_ALLOWANCE + ); + require( + balances[_to] + _value >= balances[_to], + OVERFLOW + ); + balances[_to] += _value; + balances[_from] -= _value; + allowed[_from][msg.sender] -= _value; + emit Transfer(_from, _to, _value); + return true; + } + + function approve(address _spender, uint256 _value) + public + returns (bool) + { + allowed[msg.sender][_spender] = _value; + emit Approval(msg.sender, _spender, _value); + return true; + } + + function balanceOf(address _owner) + public view + returns (uint256) + { + return balances[_owner]; + } + + function allowance(address _owner, address _spender) + public + view + returns (uint256) + { + return allowed[_owner][_spender]; + } +} diff --git a/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol b/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol new file mode 100644 index 000000000..eb879b6a8 --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol @@ -0,0 +1,73 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +contract IERC20Token { + + /// @notice send `value` token to `to` from `msg.sender` + /// @param _to The address of the recipient + /// @param _value The amount of token to be transferred + /// @return Whether the transfer was successful or not + function transfer(address _to, uint256 _value) + public + returns (bool); + + /// @notice send `value` token to `to` from `from` on the condition it is approved by `from` + /// @param _from The address of the sender + /// @param _to The address of the recipient + /// @param _value The amount of token to be transferred + /// @return Whether the transfer was successful or not + function transferFrom(address _from, address _to, uint256 _value) + public + returns (bool); + + /// @notice `msg.sender` approves `_spender` to spend `_value` tokens + /// @param _spender The address of the account able to transfer the tokens + /// @param _value The amount of wei to be approved for transfer + /// @return Whether the approval was successful or not + function approve(address _spender, uint256 _value) + public + returns (bool); + + /// @param _owner The address from which the balance will be retrieved + /// @return The balance + function balanceOf(address _owner) + public view + returns (uint256); + + /// @param _owner The address of the account owning tokens + /// @param _spender The address of the account able to transfer the tokens + /// @return Amount of remaining tokens allowed to spent + function allowance(address _owner, address _spender) + public view + returns (uint256); + + event Transfer( + address indexed _from, + address indexed _to, + uint256 _value + ); + + event Approval( + address indexed _owner, + address indexed _spender, + uint256 _value + ); +} diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol new file mode 100644 index 000000000..41ba149e3 --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol @@ -0,0 +1,406 @@ +/* +The MIT License (MIT) + +Copyright (c) 2016 Smart Contract Solutions, Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +pragma solidity ^0.4.24; + +import "./IERC721Token.sol"; +import "./IERC721Receiver.sol"; +import "../../utils/SafeMath/SafeMath.sol"; + +/** + * @title ERC721 Non-Fungible Token Standard basic implementation + * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md + * Modified from https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC721/ERC721BasicToken.sol + */ +contract ERC721Token is + IERC721Token, + SafeMath +{ + // Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` + // which can be also obtained as `ERC721Receiver(0).onERC721Received.selector` + bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba; + + // Mapping from token ID to owner + mapping (uint256 => address) internal tokenOwner; + + // Mapping from token ID to approved address + mapping (uint256 => address) internal tokenApprovals; + + // Mapping from owner to number of owned token + mapping (address => uint256) internal ownedTokensCount; + + // Mapping from owner to operator approvals + mapping (address => mapping (address => bool)) internal operatorApprovals; + + /** + * @dev Guarantees msg.sender is owner of the given token + * @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender + */ + modifier onlyOwnerOf(uint256 _tokenId) { + require(ownerOf(_tokenId) == msg.sender); + _; + } + + /** + * @dev Checks msg.sender can transfer a token, by being owner, approved, or operator + * @param _tokenId uint256 ID of the token to validate + */ + modifier canTransfer(uint256 _tokenId) { + require(isApprovedOrOwner(msg.sender, _tokenId)); + _; + } + + function ERC721Token( + string _name, + string _symbol) + public + { + name_ = _name; + symbol_ = _symbol; + } + + /** + * @dev Gets the token name + * @return string representing the token name + */ + function name() + public + view + returns (string) + { + return name_; + } + + /** + * @dev Gets the token symbol + * @return string representing the token symbol + */ + function symbol() + public + view + returns (string) + { + return symbol_; + } + + /** + * @dev Gets the balance of the specified address + * @param _owner address to query the balance of + * @return uint256 representing the amount owned by the passed address + */ + function balanceOf(address _owner) + public + view + returns (uint256) + { + require(_owner != address(0)); + return ownedTokensCount[_owner]; + } + + /** + * @dev Gets the owner of the specified token ID + * @param _tokenId uint256 ID of the token to query the owner of + * @return owner address currently marked as the owner of the given token ID + */ + function ownerOf(uint256 _tokenId) + public + view + returns (address) + { + address owner = tokenOwner[_tokenId]; + require(owner != address(0)); + return owner; + } + + /** + * @dev Returns whether the specified token exists + * @param _tokenId uint256 ID of the token to query the existance of + * @return whether the token exists + */ + function exists(uint256 _tokenId) + public + view + returns (bool) + { + address owner = tokenOwner[_tokenId]; + return owner != address(0); + } + + /** + * @dev Approves another address to transfer the given token ID + * @dev The zero address indicates there is no approved address. + * @dev There can only be one approved address per token at a given time. + * @dev Can only be called by the token owner or an approved operator. + * @param _to address to be approved for the given token ID + * @param _tokenId uint256 ID of the token to be approved + */ + function approve(address _to, uint256 _tokenId) + public + { + address owner = ownerOf(_tokenId); + require(_to != owner); + require(msg.sender == owner || isApprovedForAll(owner, msg.sender)); + + if (getApproved(_tokenId) != address(0) || _to != address(0)) { + tokenApprovals[_tokenId] = _to; + emit Approval(owner, _to, _tokenId); + } + } + + /** + * @dev Gets the approved address for a token ID, or zero if no address set + * @param _tokenId uint256 ID of the token to query the approval of + * @return address currently approved for a the given token ID + */ + function getApproved(uint256 _tokenId) + public + view + returns (address) + { + return tokenApprovals[_tokenId]; + } + + /** + * @dev Sets or unsets the approval of a given operator + * @dev An operator is allowed to transfer all tokens of the sender on their behalf + * @param _to operator address to set the approval + * @param _approved representing the status of the approval to be set + */ + function setApprovalForAll(address _to, bool _approved) + public + { + require(_to != msg.sender); + operatorApprovals[msg.sender][_to] = _approved; + emit ApprovalForAll(msg.sender, _to, _approved); + } + + /** + * @dev Tells whether an operator is approved by a given owner + * @param _owner owner address which you want to query the approval of + * @param _operator operator address which you want to query the approval of + * @return bool whether the given operator is approved by the given owner + */ + function isApprovedForAll(address _owner, address _operator) + public + view + returns (bool) + { + return operatorApprovals[_owner][_operator]; + } + + /** + * @dev Transfers the ownership of a given token ID to another address + * @dev Usage of this method is discouraged, use `safeTransferFrom` whenever possible + * @dev Requires the msg sender to be the owner, approved, or operator + * @param _from current owner of the token + * @param _to address to receive the ownership of the given token ID + * @param _tokenId uint256 ID of the token to be transferred + */ + function transferFrom(address _from, address _to, uint256 _tokenId) + public + canTransfer(_tokenId) + { + require(_from != address(0)); + require(_to != address(0)); + + clearApproval(_from, _tokenId); + removeTokenFrom(_from, _tokenId); + addTokenTo(_to, _tokenId); + + emit Transfer(_from, _to, _tokenId); + } + + /** + * @dev Safely transfers the ownership of a given token ID to another address + * @dev If the target address is a contract, it must implement `onERC721Received`, + * which is called upon a safe transfer, and return the magic value + * `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`; otherwise, + * the transfer is reverted. + * @dev Requires the msg sender to be the owner, approved, or operator + * @param _from current owner of the token + * @param _to address to receive the ownership of the given token ID + * @param _tokenId uint256 ID of the token to be transferred + */ + function safeTransferFrom( + address _from, + address _to, + uint256 _tokenId) + public + canTransfer(_tokenId) + { + // solium-disable-next-line arg-overflow + safeTransferFrom(_from, _to, _tokenId, ""); + } + + /** + * @dev Safely transfers the ownership of a given token ID to another address + * @dev If the target address is a contract, it must implement `onERC721Received`, + * which is called upon a safe transfer, and return the magic value + * `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`; otherwise, + * the transfer is reverted. + * @dev Requires the msg sender to be the owner, approved, or operator + * @param _from current owner of the token + * @param _to address to receive the ownership of the given token ID + * @param _tokenId uint256 ID of the token to be transferred + * @param _data bytes data to send along with a safe transfer check + */ + function safeTransferFrom( + address _from, + address _to, + uint256 _tokenId, + bytes _data) + public + canTransfer(_tokenId) + { + transferFrom(_from, _to, _tokenId); + // solium-disable-next-line arg-overflow + require(checkAndCallSafeTransfer(_from, _to, _tokenId, _data)); + } + + /** + * @dev Returns whether the given spender can transfer a given token ID + * @param _spender address of the spender to query + * @param _tokenId uint256 ID of the token to be transferred + * @return bool whether the msg.sender is approved for the given token ID, + * is an operator of the owner, or is the owner of the token + */ + function isApprovedOrOwner(address _spender, uint256 _tokenId) + internal + view + returns (bool) + { + address owner = ownerOf(_tokenId); + return _spender == owner || getApproved(_tokenId) == _spender || isApprovedForAll(owner, _spender); + } + + /** + * @dev Internal function to mint a new token + * @dev Reverts if the given token ID already exists + * @param _to The address that will own the minted token + * @param _tokenId uint256 ID of the token to be minted by the msg.sender + */ + function _mint(address _to, uint256 _tokenId) + internal + { + require(_to != address(0)); + addTokenTo(_to, _tokenId); + emit Transfer(address(0), _to, _tokenId); + } + + /** + * @dev Internal function to burn a specific token + * @dev Reverts if the token does not exist + * @param _tokenId uint256 ID of the token being burned by the msg.sender + */ + function _burn(address _owner, uint256 _tokenId) + internal + { + clearApproval(_owner, _tokenId); + removeTokenFrom(_owner, _tokenId); + emit Transfer(_owner, address(0), _tokenId); + } + + /** + * @dev Internal function to clear current approval of a given token ID + * @dev Reverts if the given address is not indeed the owner of the token + * @param _owner owner of the token + * @param _tokenId uint256 ID of the token to be transferred + */ + function clearApproval(address _owner, uint256 _tokenId) + internal + { + require(ownerOf(_tokenId) == _owner); + if (tokenApprovals[_tokenId] != address(0)) { + tokenApprovals[_tokenId] = address(0); + emit Approval(_owner, address(0), _tokenId); + } + } + + /** + * @dev Internal function to add a token ID to the list of a given address + * @param _to address representing the new owner of the given token ID + * @param _tokenId uint256 ID of the token to be added to the tokens list of the given address + */ + function addTokenTo(address _to, uint256 _tokenId) + internal + { + require(tokenOwner[_tokenId] == address(0)); + tokenOwner[_tokenId] = _to; + ownedTokensCount[_to] = safeAdd(ownedTokensCount[_to], 1); + } + + /** + * @dev Internal function to remove a token ID from the list of a given address + * @param _from address representing the previous owner of the given token ID + * @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address + */ + function removeTokenFrom(address _from, uint256 _tokenId) + internal + { + require(ownerOf(_tokenId) == _from); + ownedTokensCount[_from] = safeSub(ownedTokensCount[_from], 1); + tokenOwner[_tokenId] = address(0); + } + + /** + * @dev Internal function to invoke `onERC721Received` on a target address + * @dev The call is not executed if the target address is not a contract + * @param _from address representing the previous owner of the given token ID + * @param _to target address that will receive the tokens + * @param _tokenId uint256 ID of the token to be transferred + * @param _data bytes optional data to send along with the call + * @return whether the call correctly returned the expected magic value + */ + function checkAndCallSafeTransfer( + address _from, + address _to, + uint256 _tokenId, + bytes _data) + internal + returns (bool) + { + if (!isContract(_to)) { + return true; + } + bytes4 retval = IERC721Receiver(_to).onERC721Received(_from, _tokenId, _data); + return (retval == ERC721_RECEIVED); + } + + function isContract(address addr) + internal + view + returns (bool) + { + uint256 size; + // XXX Currently there is no better way to check if there is a contract in an address + // than to check the size of the code at that address. + // See https://ethereum.stackexchange.com/a/14016/36603 + // for more details about how this works. + // TODO Check this again before the Serenity release, because all addresses will be + // contracts then. + assembly { size := extcodesize(addr) } // solium-disable-line security/no-inline-assembly + return size > 0; + } +} diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol new file mode 100644 index 000000000..b0fff3c90 --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol @@ -0,0 +1,60 @@ +/* +The MIT License (MIT) + +Copyright (c) 2016 Smart Contract Solutions, Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +pragma solidity ^0.4.24; + +/** + * @title ERC721 token receiver interface + * @dev Interface for any contract that wants to support safeTransfers + * rom ERC721 asset contracts. + * Modified from https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC721/ERC721Receiver.sol + */ +contract IERC721Receiver { + /** + * @dev Magic value to be returned upon successful reception of an NFT + * Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`, + * which can be also obtained as `ERC721Receiver(0).onERC721Received.selector` + */ + bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba; + + /** + * @notice Handle the receipt of an NFT + * @dev The ERC721 smart contract calls this function on the recipient + * after a `safetransfer`. This function MAY throw to revert and reject the + * transfer. This function MUST use 50,000 gas or less. Return of other + * than the magic value MUST result in the transaction being reverted. + * Note: the contract address is always the message sender. + * @param _from The sending address + * @param _tokenId The NFT identifier which is being transfered + * @param _data Additional data with no specified format + * @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` + */ + function onERC721Received( + address _from, + uint256 _tokenId, + bytes _data) + public + returns (bytes4); +} diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol new file mode 100644 index 000000000..345712d67 --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol @@ -0,0 +1,105 @@ +/* +The MIT License (MIT) + +Copyright (c) 2016 Smart Contract Solutions, Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +pragma solidity ^0.4.24; + +/** + * @title ERC721 Non-Fungible Token Standard basic interface + * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md + * Modified from https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC721/ERC721Basic.sol + */ +contract IERC721Token { + string internal name_; + string internal symbol_; + + event Transfer( + address indexed _from, + address indexed _to, + uint256 _tokenId + ); + event Approval( + address indexed _owner, + address indexed _approved, + uint256 _tokenId + ); + event ApprovalForAll( + address indexed _owner, + address indexed _operator, + bool _approved + ); + + function name() + public + view + returns (string); + function symbol() + public + view + returns (string); + + function balanceOf(address _owner) + public + view + returns (uint256 _balance); + function ownerOf(uint256 _tokenId) + public + view + returns (address _owner); + function exists(uint256 _tokenId) + public + view + returns (bool _exists); + + function approve(address _to, uint256 _tokenId) + public; + function getApproved(uint256 _tokenId) + public + view + returns (address _operator); + + function setApprovalForAll(address _operator, bool _approved) + public; + function isApprovedForAll(address _owner, address _operator) + public + view + returns (bool); + + function transferFrom( + address _from, + address _to, + uint256 _tokenId) + public; + function safeTransferFrom( + address _from, + address _to, + uint256 _tokenId) + public; + function safeTransferFrom( + address _from, + address _to, + uint256 _tokenId, + bytes _data) + public; +} diff --git a/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol b/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol new file mode 100644 index 000000000..f62602ab3 --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol @@ -0,0 +1,58 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +import "../ERC20Token/ERC20Token.sol"; + +contract UnlimitedAllowanceToken is ERC20Token { + + uint256 constant MAX_UINT = 2**256 - 1; + + /// @dev ERC20 transferFrom, modified such that an allowance of MAX_UINT represents an unlimited allowance. See https://github.com/ethereum/EIPs/issues/717 + /// @param _from Address to transfer from. + /// @param _to Address to transfer to. + /// @param _value Amount to transfer. + /// @return Success of transfer. + function transferFrom(address _from, address _to, uint256 _value) + public + returns (bool) + { + uint256 allowance = allowed[_from][msg.sender]; + require( + balances[_from] >= _value, + INSUFFICIENT_BALANCE + ); + require( + allowance >= _value, + INSUFFICIENT_ALLOWANCE + ); + require( + balances[_to] + _value >= balances[_to], + OVERFLOW + ); + balances[_to] += _value; + balances[_from] -= _value; + if (allowance < MAX_UINT) { + allowed[_from][msg.sender] -= _value; + } + emit Transfer(_from, _to, _value); + return true; + } +} diff --git a/packages/contracts/src/2.0.0/tokens/WETH9/WETH9.sol b/packages/contracts/src/2.0.0/tokens/WETH9/WETH9.sol new file mode 100644 index 000000000..733ca414b --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/WETH9/WETH9.sol @@ -0,0 +1,756 @@ +// Copyright (C) 2015, 2016, 2017 Dapphub + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +pragma solidity ^0.4.18; + +contract WETH9 { + string public name = "Wrapped Ether"; + string public symbol = "WETH"; + uint8 public decimals = 18; + + event Approval(address indexed src, address indexed guy, uint wad); + event Transfer(address indexed src, address indexed dst, uint wad); + event Deposit(address indexed dst, uint wad); + event Withdrawal(address indexed src, uint wad); + + mapping (address => uint) public balanceOf; + mapping (address => mapping (address => uint)) public allowance; + + function() public payable { + deposit(); + } + function deposit() public payable { + balanceOf[msg.sender] += msg.value; + Deposit(msg.sender, msg.value); + } + function withdraw(uint wad) public { + require(balanceOf[msg.sender] >= wad); + balanceOf[msg.sender] -= wad; + msg.sender.transfer(wad); + Withdrawal(msg.sender, wad); + } + + function totalSupply() public view returns (uint) { + return this.balance; + } + + function approve(address guy, uint wad) public returns (bool) { + allowance[msg.sender][guy] = wad; + Approval(msg.sender, guy, wad); + return true; + } + + function transfer(address dst, uint wad) public returns (bool) { + return transferFrom(msg.sender, dst, wad); + } + + function transferFrom(address src, address dst, uint wad) + public + returns (bool) + { + require(balanceOf[src] >= wad); + + if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) { + require(allowance[src][msg.sender] >= wad); + allowance[src][msg.sender] -= wad; + } + + balanceOf[src] -= wad; + balanceOf[dst] += wad; + + Transfer(src, dst, wad); + + return true; + } +} + + +/* + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<http://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. + +*/ diff --git a/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol b/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol new file mode 100644 index 000000000..2e5b61e0b --- /dev/null +++ b/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol @@ -0,0 +1,33 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.11; + +import { UnlimitedAllowanceToken_v1 as UnlimitedAllowanceToken } from "../../../1.0.0/UnlimitedAllowanceToken/UnlimitedAllowanceToken_v1.sol"; + +contract ZRXToken is UnlimitedAllowanceToken { + + uint8 constant public decimals = 18; + uint public totalSupply = 10**27; // 1 billion tokens, 18 decimal places + string constant public name = "0x Protocol Token"; + string constant public symbol = "ZRX"; + + function ZRXToken() { + balances[msg.sender] = totalSupply; + } +} diff --git a/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol b/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol new file mode 100644 index 000000000..78b1ddf7c --- /dev/null +++ b/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol @@ -0,0 +1,545 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity ^0.4.24; + +library LibBytes { + + using LibBytes for bytes; + + /// @dev Gets the memory address for a byte array. + /// @param input Byte array to lookup. + /// @return memoryAddress Memory address of byte array. This + /// points to the header of the byte array which contains + /// the length. + function rawAddress(bytes memory input) + internal + pure + returns (uint256 memoryAddress) + { + assembly { + memoryAddress := input + } + return memoryAddress; + } + + /// @dev Gets the memory address for the contents of a byte array. + /// @param input Byte array to lookup. + /// @return memoryAddress Memory address of the contents of the byte array. + function contentAddress(bytes memory input) + internal + pure + returns (uint256 memoryAddress) + { + assembly { + memoryAddress := add(input, 32) + } + return memoryAddress; + } + + /// @dev Copies `length` bytes from memory location `source` to `dest`. + /// @param dest memory address to copy bytes to. + /// @param source memory address to copy bytes from. + /// @param length number of bytes to copy. + function memCopy( + uint256 dest, + uint256 source, + uint256 length + ) + internal + pure + { + if (length < 32) { + // Handle a partial word by reading destination and masking + // off the bits we are interested in. + // This correctly handles overlap, zero lengths and source == dest + assembly { + let mask := sub(exp(256, sub(32, length)), 1) + let s := and(mload(source), not(mask)) + let d := and(mload(dest), mask) + mstore(dest, or(s, d)) + } + } else { + // Skip the O(length) loop when source == dest. + if (source == dest) { + return; + } + + // For large copies we copy whole words at a time. The final + // word is aligned to the end of the range (instead of after the + // previous) to handle partial words. So a copy will look like this: + // + // #### + // #### + // #### + // #### + // + // We handle overlap in the source and destination range by + // changing the copying direction. This prevents us from + // overwriting parts of source that we still need to copy. + // + // This correctly handles source == dest + // + if (source > dest) { + assembly { + // We subtract 32 from `sEnd` and `dEnd` because it + // is easier to compare with in the loop, and these + // are also the addresses we need for copying the + // last bytes. + length := sub(length, 32) + let sEnd := add(source, length) + let dEnd := add(dest, length) + + // Remember the last 32 bytes of source + // This needs to be done here and not after the loop + // because we may have overwritten the last bytes in + // source already due to overlap. + let last := mload(sEnd) + + // Copy whole words front to back + // Note: the first check is always true, + // this could have been a do-while loop. + for {} lt(source, sEnd) {} { + mstore(dest, mload(source)) + source := add(source, 32) + dest := add(dest, 32) + } + + // Write the last 32 bytes + mstore(dEnd, last) + } + } else { + assembly { + // We subtract 32 from `sEnd` and `dEnd` because those + // are the starting points when copying a word at the end. + length := sub(length, 32) + let sEnd := add(source, length) + let dEnd := add(dest, length) + + // Remember the first 32 bytes of source + // This needs to be done here and not after the loop + // because we may have overwritten the first bytes in + // source already due to overlap. + let first := mload(source) + + // Copy whole words back to front + // We use a signed comparisson here to allow dEnd to become + // negative (happens when source and dest < 32). Valid + // addresses in local memory will never be larger than + // 2**255, so they can be safely re-interpreted as signed. + // Note: the first check is always true, + // this could have been a do-while loop. + for {} slt(dest, dEnd) {} { + mstore(dEnd, mload(sEnd)) + sEnd := sub(sEnd, 32) + dEnd := sub(dEnd, 32) + } + + // Write the first 32 bytes + mstore(dest, first) + } + } + } + } + + /// @dev Returns a slices from a byte array. + /// @param b The byte array to take a slice from. + /// @param from The starting index for the slice (inclusive). + /// @param to The final index for the slice (exclusive). + /// @return result The slice containing bytes at indices [from, to) + function slice(bytes memory b, uint256 from, uint256 to) + internal + pure + returns (bytes memory result) + { + require( + from <= to, + "FROM_LESS_THAN_TO_REQUIRED" + ); + require( + to < b.length, + "TO_LESS_THAN_LENGTH_REQUIRED" + ); + + // Create a new bytes structure and copy contents + result = new bytes(to - from); + memCopy( + result.contentAddress(), + b.contentAddress() + from, + result.length); + return result; + } + + /// @dev Returns a slice from a byte array without preserving the input. + /// @param b The byte array to take a slice from. Will be destroyed in the process. + /// @param from The starting index for the slice (inclusive). + /// @param to The final index for the slice (exclusive). + /// @return result The slice containing bytes at indices [from, to) + /// @dev When `from == 0`, the original array will match the slice. In other cases its state will be corrupted. + function sliceDestructive(bytes memory b, uint256 from, uint256 to) + internal + pure + returns (bytes memory result) + { + require( + from <= to, + "FROM_LESS_THAN_TO_REQUIRED" + ); + require( + to < b.length, + "TO_LESS_THAN_LENGTH_REQUIRED" + ); + + // Create a new bytes structure around [from, to) in-place. + assembly { + result := add(b, from) + mstore(result, sub(to, from)) + } + return result; + } + + /// @dev Pops the last byte off of a byte array by modifying its length. + /// @param b Byte array that will be modified. + /// @return The byte that was popped off. + function popLastByte(bytes memory b) + internal + pure + returns (bytes1 result) + { + require( + b.length > 0, + "GREATER_THAN_ZERO_LENGTH_REQUIRED" + ); + + // Store last byte. + result = b[b.length - 1]; + + assembly { + // Decrement length of byte array. + let newLen := sub(mload(b), 1) + mstore(b, newLen) + } + return result; + } + + /// @dev Pops the last 20 bytes off of a byte array by modifying its length. + /// @param b Byte array that will be modified. + /// @return The 20 byte address that was popped off. + function popLast20Bytes(bytes memory b) + internal + pure + returns (address result) + { + require( + b.length >= 20, + "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" + ); + + // Store last 20 bytes. + result = readAddress(b, b.length - 20); + + assembly { + // Subtract 20 from byte array length. + let newLen := sub(mload(b), 20) + mstore(b, newLen) + } + return result; + } + + /// @dev Tests equality of two byte arrays. + /// @param lhs First byte array to compare. + /// @param rhs Second byte array to compare. + /// @return True if arrays are the same. False otherwise. + function equals( + bytes memory lhs, + bytes memory rhs + ) + internal + pure + returns (bool equal) + { + // Keccak gas cost is 30 + numWords * 6. This is a cheap way to compare. + // We early exit on unequal lengths, but keccak would also correctly + // handle this. + return lhs.length == rhs.length && keccak256(lhs) == keccak256(rhs); + } + + /// @dev Reads an address from a position in a byte array. + /// @param b Byte array containing an address. + /// @param index Index in byte array of address. + /// @return address from byte array. + function readAddress( + bytes memory b, + uint256 index + ) + internal + pure + returns (address result) + { + require( + b.length >= index + 20, // 20 is length of address + "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" + ); + + // Add offset to index: + // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index) + // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index) + index += 20; + + // Read address from array memory + assembly { + // 1. Add index to address of bytes array + // 2. Load 32-byte word from memory + // 3. Apply 20-byte mask to obtain address + result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff) + } + return result; + } + + /// @dev Writes an address into a specific position in a byte array. + /// @param b Byte array to insert address into. + /// @param index Index in byte array of address. + /// @param input Address to put into byte array. + function writeAddress( + bytes memory b, + uint256 index, + address input + ) + internal + pure + { + require( + b.length >= index + 20, // 20 is length of address + "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" + ); + + // Add offset to index: + // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index) + // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index) + index += 20; + + // Store address into array memory + assembly { + // The address occupies 20 bytes and mstore stores 32 bytes. + // First fetch the 32-byte word where we'll be storing the address, then + // apply a mask so we have only the bytes in the word that the address will not occupy. + // Then combine these bytes with the address and store the 32 bytes back to memory with mstore. + + // 1. Add index to address of bytes array + // 2. Load 32-byte word from memory + // 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address + let neighbors := and(mload(add(b, index)), 0xffffffffffffffffffffffff0000000000000000000000000000000000000000) + + // Make sure input address is clean. + // (Solidity does not guarantee this) + input := and(input, 0xffffffffffffffffffffffffffffffffffffffff) + + // Store the neighbors and address into memory + mstore(add(b, index), xor(input, neighbors)) + } + } + + /// @dev Reads a bytes32 value from a position in a byte array. + /// @param b Byte array containing a bytes32 value. + /// @param index Index in byte array of bytes32 value. + /// @return bytes32 value from byte array. + function readBytes32( + bytes memory b, + uint256 index + ) + internal + pure + returns (bytes32 result) + { + require( + b.length >= index + 32, + "GREATER_OR_EQUAL_TO_32_LENGTH_REQUIRED" + ); + + // Arrays are prefixed by a 256 bit length parameter + index += 32; + + // Read the bytes32 from array memory + assembly { + result := mload(add(b, index)) + } + return result; + } + + /// @dev Writes a bytes32 into a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input bytes32 to put into byte array. + function writeBytes32( + bytes memory b, + uint256 index, + bytes32 input + ) + internal + pure + { + require( + b.length >= index + 32, + "GREATER_OR_EQUAL_TO_32_LENGTH_REQUIRED" + ); + + // Arrays are prefixed by a 256 bit length parameter + index += 32; + + // Read the bytes32 from array memory + assembly { + mstore(add(b, index), input) + } + } + + /// @dev Reads a uint256 value from a position in a byte array. + /// @param b Byte array containing a uint256 value. + /// @param index Index in byte array of uint256 value. + /// @return uint256 value from byte array. + function readUint256( + bytes memory b, + uint256 index + ) + internal + pure + returns (uint256 result) + { + return uint256(readBytes32(b, index)); + } + + /// @dev Writes a uint256 into a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input uint256 to put into byte array. + function writeUint256( + bytes memory b, + uint256 index, + uint256 input + ) + internal + pure + { + writeBytes32(b, index, bytes32(input)); + } + + /// @dev Reads an unpadded bytes4 value from a position in a byte array. + /// @param b Byte array containing a bytes4 value. + /// @param index Index in byte array of bytes4 value. + /// @return bytes4 value from byte array. + function readBytes4( + bytes memory b, + uint256 index) + internal + pure + returns (bytes4 result) + { + require( + b.length >= index + 4, + "GREATER_OR_EQUAL_TO_4_LENGTH_REQUIRED" + ); + assembly { + result := mload(add(b, 32)) + // Solidity does not require us to clean the trailing bytes. + // We do it anyway + result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000) + } + return result; + } + + /// @dev Reads nested bytes from a specific position. + /// @dev NOTE: the returned value overlaps with the input value. + /// Both should be treated as immutable. + /// @param b Byte array containing nested bytes. + /// @param index Index of nested bytes. + /// @return result Nested bytes. + function readBytesWithLength( + bytes memory b, + uint256 index + ) + internal + pure + returns (bytes memory result) + { + // Read length of nested bytes + uint256 nestedBytesLength = readUint256(b, index); + index += 32; + + // Assert length of <b> is valid, given + // length of nested bytes + require( + b.length >= index + nestedBytesLength, + "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED" + ); + + // Return a pointer to the byte array as it exists inside `b` + assembly { + result := add(b, index) + } + return result; + } + + /// @dev Inserts bytes at a specific position in a byte array. + /// @param b Byte array to insert <input> into. + /// @param index Index in byte array of <input>. + /// @param input bytes to insert. + function writeBytesWithLength( + bytes memory b, + uint256 index, + bytes memory input + ) + internal + pure + { + // Assert length of <b> is valid, given + // length of input + require( + b.length >= index + 32 /* 32 bytes to store length */ + input.length, + "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED" + ); + + // Copy <input> into <b> + memCopy( + b.contentAddress() + index, + input.rawAddress(), // includes length of <input> + input.length + 32 // +32 bytes to store <input> length + ); + } + + /// @dev Performs a deep copy of a byte array onto another byte array of greater than or equal length. + /// @param dest Byte array that will be overwritten with source bytes. + /// @param source Byte array to copy onto dest bytes. + function deepCopyBytes( + bytes memory dest, + bytes memory source + ) + internal + pure + { + uint256 sourceLen = source.length; + // Dest length must be >= source length, or some bytes would not be copied. + require( + dest.length >= sourceLen, + "GREATER_OR_EQUAL_TO_SOURCE_BYTES_LENGTH_REQUIRED" + ); + memCopy( + dest.contentAddress(), + source.contentAddress(), + sourceLen + ); + } +} diff --git a/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol b/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol new file mode 100644 index 000000000..e77680903 --- /dev/null +++ b/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol @@ -0,0 +1,14 @@ +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +/* + * Ownable + * + * Base contract with an owner. + * Provides onlyOwner modifier, which prevents function from running if it is called by anyone other than the owner. + */ + +contract IOwnable { + function transferOwnership(address newOwner) + public; +} diff --git a/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol b/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol new file mode 100644 index 000000000..6f5761cc7 --- /dev/null +++ b/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol @@ -0,0 +1,38 @@ +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +/* + * Ownable + * + * Base contract with an owner. + * Provides onlyOwner modifier, which prevents function from running if it is called by anyone other than the owner. + */ + +import "./IOwnable.sol"; + +contract Ownable is IOwnable { + address public owner; + + constructor () + public + { + owner = msg.sender; + } + + modifier onlyOwner() { + require( + msg.sender == owner, + "ONLY_CONTRACT_OWNER" + ); + _; + } + + function transferOwnership(address newOwner) + public + onlyOwner + { + if (newOwner != address(0)) { + owner = newOwner; + } + } +} diff --git a/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol b/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol new file mode 100644 index 000000000..e137f6ca5 --- /dev/null +++ b/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol @@ -0,0 +1,74 @@ +pragma solidity ^0.4.24; +pragma experimental ABIEncoderV2; + +contract SafeMath { + function safeMul(uint a, uint b) + internal + pure + returns (uint256) + { + uint c = a * b; + assert(a == 0 || c / a == b); + return c; + } + + function safeDiv(uint a, uint b) + internal + pure + returns (uint256) + { + uint c = a / b; + return c; + } + + function safeSub(uint a, uint b) + internal + pure + returns (uint256) + { + assert(b <= a); + return a - b; + } + + function safeAdd(uint a, uint b) + internal + pure + returns (uint256) + { + uint c = a + b; + assert(c >= a); + return c; + } + + function max64(uint64 a, uint64 b) + internal + pure + returns (uint256) + { + return a >= b ? a : b; + } + + function min64(uint64 a, uint64 b) + internal + pure + returns (uint256) + { + return a < b ? a : b; + } + + function max256(uint256 a, uint256 b) + internal + pure + returns (uint256) + { + return a >= b ? a : b; + } + + function min256(uint256 a, uint256 b) + internal + pure + returns (uint256) + { + return a < b ? a : b; + } +} |