diff options
Diffstat (limited to 'packages/contracts')
21 files changed, 325 insertions, 52 deletions
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinAssetProxyDispatcher.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinAssetProxyDispatcher.sol index 14d5eb7ca..308dace32 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinAssetProxyDispatcher.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinAssetProxyDispatcher.sol @@ -20,7 +20,7 @@ pragma solidity ^0.4.23; import "../../utils/Ownable/Ownable.sol"; import "../AssetProxy/interfaces/IAssetProxy.sol"; -import "./lib/LibExchangeErrors.sol"; +import "./libs/LibExchangeErrors.sol"; import "./mixins/MAssetProxyDispatcher.sol"; contract MixinAssetProxyDispatcher is @@ -94,7 +94,7 @@ contract MixinAssetProxyDispatcher is // Lookup asset proxy require( assetMetadata.length >= 1, - GREATER_THAN_ZERO_LENGTH_REQUIRED + GT_ZERO_LENGTH_REQUIRED ); uint8 assetProxyId = uint8(assetMetadata[0]); IAssetProxy assetProxy = assetProxies[assetProxyId]; diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol index c22acf966..82c7a2ddc 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol @@ -19,10 +19,10 @@ pragma solidity ^0.4.23; pragma experimental ABIEncoderV2; -import "./lib/LibFillResults.sol"; -import "./lib/LibOrder.sol"; -import "./lib/LibMath.sol"; -import "./lib/LibExchangeErrors.sol"; +import "./libs/LibFillResults.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibMath.sol"; +import "./libs/LibExchangeErrors.sol"; import "./mixins/MExchangeCore.sol"; import "./mixins/MSettlement.sol"; import "./mixins/MSignatureValidator.sol"; @@ -94,11 +94,11 @@ contract MixinExchangeCore is if (filled[orderHash] == 0) { require( order.makerAssetAmount > 0, - GREATER_THAN_ZERO_AMOUNT_REQUIRED + GT_ZERO_AMOUNT_REQUIRED ); require( order.takerAssetAmount > 0, - GREATER_THAN_ZERO_AMOUNT_REQUIRED + GT_ZERO_AMOUNT_REQUIRED ); require( isValidSignature(orderHash, order.makerAddress, signature), @@ -124,7 +124,7 @@ contract MixinExchangeCore is } require( takerAssetFillAmount > 0, - GREATER_THAN_ZERO_AMOUNT_REQUIRED + GT_ZERO_AMOUNT_REQUIRED ); // Validate order expiration @@ -174,11 +174,11 @@ contract MixinExchangeCore is // Validate the order require( order.makerAssetAmount > 0, - GREATER_THAN_ZERO_AMOUNT_REQUIRED + GT_ZERO_AMOUNT_REQUIRED ); require( order.takerAssetAmount > 0, - GREATER_THAN_ZERO_AMOUNT_REQUIRED + GT_ZERO_AMOUNT_REQUIRED ); // Validate sender is allowed to cancel this order diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinSettlement.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinSettlement.sol index ae1dd9bee..30f1bb49b 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinSettlement.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinSettlement.sol @@ -20,15 +20,17 @@ pragma solidity ^0.4.23; import "./mixins/MSettlement.sol"; import "./mixins/MAssetProxyDispatcher.sol"; -import "./lib/LibOrder.sol"; -import "./lib/LibMath.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibMath.sol"; contract MixinSettlement is LibMath, MSettlement, MAssetProxyDispatcher { - /// ZRX metadata used for fee transfers. + // ZRX metadata used for fee transfers. + // This will be constant throughout the life of the Exchange contract, + // since ZRX will always be transferred via the ERC20 AssetProxy. bytes internal ZRX_PROXY_DATA; /// @dev Gets the ZRX metadata used for fee transfers. @@ -49,10 +51,10 @@ contract MixinSettlement is ZRX_PROXY_DATA = _zrxProxyData; } - /// @dev Settles an order by transfering assets between counterparties. + /// @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 takerAssetFilledAmount The amount of takerAsset that will be transfered to the order's maker. + /// @param takerAssetFilledAmount The amount of takerAsset that will be transferred to the order's maker. /// @return Amount filled by maker and fees paid by maker/taker. function settleOrder( LibOrder.Order memory order, diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol index 43d138669..2322625d9 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol @@ -20,7 +20,7 @@ pragma solidity ^0.4.23; import "./mixins/MSignatureValidator.sol"; import "./interfaces/ISigner.sol"; -import "./lib/LibExchangeErrors.sol"; +import "./libs/LibExchangeErrors.sol"; import "../../utils/LibBytes/LibBytes.sol"; contract MixinSignatureValidator is diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol index a8b60e8a4..7f12834a3 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol @@ -19,7 +19,7 @@ pragma solidity ^0.4.21; import "./mixins/MSignatureValidator.sol"; import "./mixins/MTransactions.sol"; -import "./lib/LibExchangeErrors.sol"; +import "./libs/LibExchangeErrors.sol"; contract MixinTransactions is LibExchangeErrors, diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol index 33a125083..42517221e 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol @@ -21,10 +21,10 @@ pragma experimental ABIEncoderV2; import "../../utils/LibBytes/LibBytes.sol"; import "./mixins/MExchangeCore.sol"; -import "./lib/LibMath.sol"; -import "./lib/LibOrder.sol"; -import "./lib/LibFillResults.sol"; -import "./lib/LibExchangeErrors.sol"; +import "./libs/LibMath.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibFillResults.sol"; +import "./libs/LibExchangeErrors.sol"; contract MixinWrapperFunctions is LibOrder, diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol index d60b8ca48..4e4ed6be8 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol @@ -38,4 +38,4 @@ contract IAssetProxyDispatcher { external view returns (address); -}
\ No newline at end of file +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IExchangeCore.sol b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IExchangeCore.sol index 18f794ee8..0f19525ca 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IExchangeCore.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IExchangeCore.sol @@ -19,8 +19,8 @@ pragma solidity ^0.4.23; pragma experimental ABIEncoderV2; -import "../lib/LibOrder.sol"; -import "../lib/LibFillResults.sol"; +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; contract IExchangeCore { @@ -48,4 +48,4 @@ contract IExchangeCore { function cancelOrder(LibOrder.Order memory order) public returns (bool); -}
\ No newline at end of file +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ISignatureValidator.sol b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ISignatureValidator.sol index 806d7c56f..b4a238472 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ISignatureValidator.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ISignatureValidator.sol @@ -29,4 +29,4 @@ contract ISignatureValidator { address signer, bytes signature) external; -}
\ No newline at end of file +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ITransactions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ITransactions.sol index 078b07816..76e4cf2fe 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ITransactions.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/ITransactions.sol @@ -30,4 +30,4 @@ contract ITransactions { bytes data, bytes signature) external; -}
\ No newline at end of file +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IWrapperFunctions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IWrapperFunctions.sol index 0ebae309d..d23170b1c 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IWrapperFunctions.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/interfaces/IWrapperFunctions.sol @@ -19,8 +19,8 @@ pragma solidity ^0.4.23; pragma experimental ABIEncoderV2; -import "./lib/LibOrder.sol"; -import "./lib/LibFillResults.sol"; +import "./libs/LibOrder.sol"; +import "./libs/LibFillResults.sol"; contract IWrapperFunctions is LibOrder, diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibExchangeErrors.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibExchangeErrors.sol new file mode 100644 index 000000000..6ffbdfdca --- /dev/null +++ b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibExchangeErrors.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 ^0.4.23; + +contract LibExchangeErrors { + + // Error Codes + enum Errors { + ORDER_EXPIRED, // Order has already expired + ORDER_FULLY_FILLED, // Order has already been fully filled + ORDER_CANCELLED, // Order has already been cancelled + ROUNDING_ERROR_TOO_LARGE, // Rounding error too large + INSUFFICIENT_BALANCE_OR_ALLOWANCE // Insufficient balance or allowance for token transfer + } + + event ExchangeError(uint8 indexed errorId, bytes32 indexed orderHash); + + // Core revert reasons + string constant GT_ZERO_AMOUNT_REQUIRED = "Amount must be greater than 0."; + string constant SIGNATURE_VALIDATION_FAILED = "Signature validation failed."; + string constant INVALID_SENDER = "Invalid `msg.sender`."; + string constant INVALID_CONTEXT = "Function called in an invalid context."; + string constant INVALID_NEW_MAKER_EPOCH = "Specified salt must be greater than or equal to existing makerEpoch."; + + // Transaction revert reasons + string constant DUPLICATE_TRANSACTION_HASH = "Transaction has already been executed."; + string constant TRANSACTION_EXECUTION_FAILED = "Transaction execution failed."; + + // Wrapper revert reasons + string constant COMPLETE_FILL_FAILED = "Desired fill amount could not be completely filled."; + string constant ASSET_DATA_MISMATCH = "Asset data must be the same for each order."; + + // Asset proxy dispatcher revert reasons + string constant GT_ZERO_LENGTH_REQUIRED = "Length must be greater than 0."; + string constant OLD_ASSET_PROXY_MISMATCH = "Old asset proxy does not match asset proxy at given id."; + string constant NEW_ASSET_PROXY_MISMATCH = "New asset proxy id does not match given id."; + + // Signature validator revert reasons + string constant INVALID_SIGNATURE_LENGTH = "Invalid signature length."; + string constant ILLEGAL_SIGNATURE_TYPE = "Illegal signature type."; + string constant UNSUPPORTED_SIGNATURE_TYPE = "Unsupported signature type."; +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibFillResults.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibFillResults.sol new file mode 100644 index 000000000..3b8f2acf9 --- /dev/null +++ b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibFillResults.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 ^0.4.23; + +import "../../../utils/SafeMath/SafeMath.sol"; + +contract LibFillResults is + SafeMath +{ + + struct FillResults { + uint256 makerAssetFilledAmount; + uint256 takerAssetFilledAmount; + uint256 makerFeePaid; + uint256 takerFeePaid; + } + + /// @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); + } +}
\ No newline at end of file diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibMath.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibMath.sol new file mode 100644 index 000000000..b48602d19 --- /dev/null +++ b/packages/contracts/src/contracts/current/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 ^0.4.23; + +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/contracts/current/protocol/Exchange/libs/LibOrder.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol new file mode 100644 index 000000000..0fe8c8c96 --- /dev/null +++ b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol @@ -0,0 +1,84 @@ +/* + + 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 LibOrder { + + bytes32 constant ORDER_SCHEMA_HASH = keccak256( + "address exchangeAddress", + "address makerAddress", + "address takerAddress", + "address feeRecipientAddress", + "address senderAddress", + "uint256 makerAssetAmount", + "uint256 takerAssetAmount", + "uint256 makerFee", + "uint256 takerFee", + "uint256 expirationTimeSeconds", + "uint256 salt", + "bytes makerAssetData", + "bytes takerAssetData" + ); + + struct 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; + } + + /// @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) + { + // TODO: EIP712 is not finalized yet + // Source: https://github.com/ethereum/EIPs/pull/712 + orderHash = keccak256( + ORDER_SCHEMA_HASH, + keccak256( + address(this), + order.makerAddress, + order.takerAddress, + order.feeRecipientAddress, + order.senderAddress, + order.makerAssetAmount, + order.takerAssetAmount, + order.makerFee, + order.takerFee, + order.expirationTimeSeconds, + order.salt, + order.makerAssetData, + order.takerAssetData + ) + ); + return orderHash; + } +} diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MExchangeCore.sol b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MExchangeCore.sol index b80af9dc1..5b78e70da 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MExchangeCore.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MExchangeCore.sol @@ -18,8 +18,8 @@ pragma solidity ^0.4.23; -import "../lib/LibOrder.sol"; -import "../lib/LibFillResults.sol"; +import "../libs/LibOrder.sol"; +import "../libs/LibFillResults.sol"; import "../interfaces/IExchangeCore.sol"; contract MExchangeCore is diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MSettlement.sol b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MSettlement.sol index 3075aae15..5e2edbf99 100644 --- a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MSettlement.sol +++ b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MSettlement.sol @@ -18,7 +18,7 @@ pragma solidity ^0.4.23; -import "../lib/LibOrder.sol"; +import "../libs/LibOrder.sol"; contract MSettlement { diff --git a/packages/contracts/src/contracts/current/test/TestLibs/TestLibs.sol b/packages/contracts/src/contracts/current/test/TestLibs/TestLibs.sol index 3d199681b..0dc7785b2 100644 --- a/packages/contracts/src/contracts/current/test/TestLibs/TestLibs.sol +++ b/packages/contracts/src/contracts/current/test/TestLibs/TestLibs.sol @@ -19,9 +19,9 @@ pragma solidity ^0.4.23; pragma experimental ABIEncoderV2; -import "../../protocol/Exchange/lib/LibMath.sol"; -import "../../protocol/Exchange/lib/LibOrder.sol"; -import "../../protocol/Exchange/lib/LibFillResults.sol"; +import "../../protocol/Exchange/libs/LibMath.sol"; +import "../../protocol/Exchange/libs/LibOrder.sol"; +import "../../protocol/Exchange/libs/LibFillResults.sol"; contract TestLibs is LibMath, diff --git a/packages/contracts/src/contracts/current/tokens/ERC20Token/ERC20Token.sol b/packages/contracts/src/contracts/current/tokens/ERC20Token/ERC20Token.sol index 27e7fa355..6497d3c7a 100644 --- a/packages/contracts/src/contracts/current/tokens/ERC20Token/ERC20Token.sol +++ b/packages/contracts/src/contracts/current/tokens/ERC20Token/ERC20Token.sol @@ -23,17 +23,26 @@ import "./IERC20Token.sol"; contract ERC20Token is IERC20Token { + string constant INSUFFICIENT_BALANCE = "Insufficient balance to complete transfer."; + string constant INSUFFICIENT_ALLOWANCE = "Insufficient allowance to complete transfer."; + 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 to complete transfer." + INSUFFICIENT_BALANCE ); require( balances[_to] + _value >= balances[_to], - "Transfer would result in an overflow." + OVERFLOW ); balances[msg.sender] -= _value; balances[_to] += _value; @@ -47,15 +56,15 @@ contract ERC20Token is IERC20Token { { require( balances[_from] >= _value, - "Insufficient balance to complete transfer." + INSUFFICIENT_BALANCE ); require( allowed[_from][msg.sender] >= _value, - "Insufficient allowance to complete transfer." + INSUFFICIENT_ALLOWANCE ); require( balances[_to] + _value >= balances[_to], - "Transfer would result in an overflow." + OVERFLOW ); balances[_to] += _value; balances[_from] -= _value; @@ -87,8 +96,5 @@ contract ERC20Token is IERC20Token { { return allowed[_owner][_spender]; } - - mapping (address => uint256) balances; - mapping (address => mapping (address => uint256)) allowed; - uint256 public totalSupply; } + diff --git a/packages/contracts/src/contracts/current/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol b/packages/contracts/src/contracts/current/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol index 4aedced49..395e5d356 100644 --- a/packages/contracts/src/contracts/current/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol +++ b/packages/contracts/src/contracts/current/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol @@ -37,15 +37,15 @@ contract UnlimitedAllowanceToken is ERC20Token { uint256 allowance = allowed[_from][msg.sender]; require( balances[_from] >= _value, - "Insufficient balance to complete transfer." + INSUFFICIENT_BALANCE ); require( allowance >= _value, - "Insufficient allowance to complete transfer." + INSUFFICIENT_ALLOWANCE ); require( balances[_to] + _value >= balances[_to], - "Transfer would result in an overflow." + OVERFLOW ); balances[_to] += _value; balances[_from] -= _value; diff --git a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol index 3eba0708f..3c5531e35 100644 --- a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol +++ b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol @@ -20,6 +20,10 @@ pragma solidity ^0.4.23; contract LibBytes { + // Revert reasons + string constant GTE_20_LENGTH_REQUIRED = "Length must be greater than or equal to 20."; + string constant GTE_32_LENGTH_REQUIRED = "Length must be greater than or equal to 32."; + /// @dev Tests equality of two byte arrays. /// @param lhs First byte array to compare. /// @param rhs Second byte array to compare. @@ -65,7 +69,7 @@ contract LibBytes { { require( b.length >= index + 20, // 20 is length of address - "Cannot read address from byte array shorter than 20 bytes." + GTE_20_LENGTH_REQUIRED ); // Add offset to index: @@ -96,7 +100,7 @@ contract LibBytes { { require( b.length >= index + 20, // 20 is length of address - "Cannot write address to byte array shorter than 20 bytes." + GTE_20_LENGTH_REQUIRED ); // Add offset to index: @@ -134,7 +138,7 @@ contract LibBytes { { require( b.length >= index + 32, - "Cannot read 32 bytes from byte array shorter than 32 bytes." + GTE_32_LENGTH_REQUIRED ); // Arrays are prefixed by a 256 bit length parameter @@ -160,7 +164,7 @@ contract LibBytes { { require( b.length >= index + 32, - "Cannot write 32 bytes to byte array shorter than 32 bytes." + GTE_32_LENGTH_REQUIRED ); // Arrays are prefixed by a 256 bit length parameter |