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authorJacob Evans <jacob@dekz.net>2018-06-18 18:59:23 +0800
committerJacob Evans <jacob@dekz.net>2018-06-18 19:46:05 +0800
commitd4ee0e862297c16f8ee62efccd31f1193052c64e (patch)
tree4b3f8a4a75dfb9ed73bccc850a01ac789363c830 /packages/contracts/src
parenta8d328bfc926a62d61830334fadc43fc5d013e0e (diff)
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Rebase and update feedback
Cache the domain separator data with address this Use the EIP712Types enum for types everywhere Rename EIP712 struct ExecuteTransaction to ZeroExTransaction
Diffstat (limited to 'packages/contracts/src')
-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol33
-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/libs/LibEIP712.sol65
-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol52
-rw-r--r--packages/contracts/src/utils/transaction_factory.ts16
4 files changed, 85 insertions, 81 deletions
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
index e3f6b2b2b..9bdaa0f8f 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
@@ -37,28 +37,31 @@ contract MixinTransactions is
// Address of current transaction signer
address public currentContextAddress;
- bytes32 constant EXECUTE_TRANSACTION_SCHEMA_HASH = keccak256(
- "ExecuteTransaction(",
+ // Hash for the EIP712 ZeroEx Transaction Schema
+ bytes32 constant EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
+ "ZeroExTransaction(",
"uint256 salt,",
"address signer,",
"bytes data",
")"
- );
+ ));
- function getExecuteTransactionHash(uint256 salt, address signer, bytes data)
+ /// @dev Calculates EIP712 hash of the Transaction.
+ /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+ /// @param signer Address of transaction signer.
+ /// @param data AbiV2 encoded calldata.
+ /// @return EIP712 hash of the Transaction.
+ function hashZeroExTransaction(uint256 salt, address signer, bytes data)
internal
view
- returns (bytes32 executeTransactionHash)
+ returns (bytes32)
{
- executeTransactionHash = createEIP712Message(
- keccak256(
- EXECUTE_TRANSACTION_SCHEMA_HASH,
- salt,
- bytes32(signer),
- keccak256(data)
- )
- );
- return executeTransactionHash;
+ return keccak256(abi.encodePacked(
+ EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
+ salt,
+ bytes32(signer),
+ keccak256(abi.encodePacked(data))
+ ));
}
/// @dev Executes an exchange method call in the context of signer.
@@ -80,7 +83,7 @@ contract MixinTransactions is
REENTRANCY_ILLEGAL
);
- bytes32 transactionHash = getExecuteTransactionHash(salt, signer, data);
+ bytes32 transactionHash = hashEIP712Message(hashZeroExTransaction(salt, signer, data));
// Validate transaction has not been executed
require(
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibEIP712.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibEIP712.sol
index 7704e3db4..991137f32 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibEIP712.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibEIP712.sol
@@ -19,44 +19,37 @@
pragma solidity ^0.4.24;
contract LibEIP712 {
- string public constant EIP191_HEADER = "\x19\x01";
-
- bytes32 public constant EIP712_DOMAIN_SEPARATOR_NAME_HASH = keccak256("0x Protocol");
-
- bytes32 public constant EIP712_DOMAIN_SEPARATOR_VERSION_HASH = keccak256("2");
-
- bytes32 public constant EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
- abi.encodePacked(
- "DomainSeparator(",
- "string name,",
- "string version,",
- "address contract",
- ")"
- )
- );
+ // EIP191 header for EIP712 prefix
+ string constant EIP191_HEADER = "\x19\x01";
+
+ // 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.encodePacked(
+ EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
+ keccak256(abi.encodePacked("0x Protocol")),
+ keccak256(abi.encodePacked("2")),
+ bytes32(address(this))
+ ));
+ }
- function createEIP712Message(bytes32 hashStruct)
+ function hashEIP712Message(bytes32 hashStruct)
internal
view
- returns (bytes32 message)
+ returns (bytes32)
{
- // TODO: EIP712 is not finalized yet
- // Source: https://github.com/ethereum/EIPs/pull/712
- // TODO: Cache the Domain Separator
- message = keccak256(
- abi.encodePacked(
- EIP191_HEADER,
- keccak256(
- abi.encodePacked(
- EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
- EIP712_DOMAIN_SEPARATOR_NAME_HASH,
- EIP712_DOMAIN_SEPARATOR_VERSION_HASH,
- bytes32(address(this))
- )
- ),
- hashStruct
- )
- );
- return message;
+ return keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, hashStruct));
}
-} \ No newline at end of file
+}
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol
index ed532fd59..04374f1d0 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/libs/LibOrder.sol
@@ -24,8 +24,8 @@ contract LibOrder is
LibEIP712
{
- bytes32 constant EIP712_ORDER_SCHEMA_HASH = keccak256(
- abi.encodePacked(
+ // Hash for the EIP712 Order Schema
+ bytes32 constant EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked(
"Order(",
"address makerAddress,",
"address takerAddress,",
@@ -40,7 +40,8 @@ contract LibOrder is
"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.
@@ -86,25 +87,32 @@ contract LibOrder is
view
returns (bytes32 orderHash)
{
- orderHash = createEIP712Message(
- keccak256(
- abi.encodePacked(
- EIP712_ORDER_SCHEMA_HASH,
- bytes32(order.makerAddress),
- bytes32(order.takerAddress),
- bytes32(order.feeRecipientAddress),
- bytes32(order.senderAddress),
- order.makerAssetAmount,
- order.takerAssetAmount,
- order.makerFee,
- order.takerFee,
- order.expirationTimeSeconds,
- order.salt,
- keccak256(abi.encodePacked(order.makerAssetData)),
- keccak256(abi.encodePacked(order.takerAssetData))
- )
- )
- );
+ 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)
+ {
+ return keccak256(abi.encodePacked(
+ EIP712_ORDER_SCHEMA_HASH,
+ bytes32(order.makerAddress),
+ bytes32(order.takerAddress),
+ bytes32(order.feeRecipientAddress),
+ bytes32(order.senderAddress),
+ order.makerAssetAmount,
+ order.takerAssetAmount,
+ order.makerFee,
+ order.takerFee,
+ order.expirationTimeSeconds,
+ order.salt,
+ keccak256(abi.encodePacked(order.makerAssetData)),
+ keccak256(abi.encodePacked(order.takerAssetData))
+ ));
+ }
}
diff --git a/packages/contracts/src/utils/transaction_factory.ts b/packages/contracts/src/utils/transaction_factory.ts
index bb15a0309..c0a32b83a 100644
--- a/packages/contracts/src/utils/transaction_factory.ts
+++ b/packages/contracts/src/utils/transaction_factory.ts
@@ -1,16 +1,16 @@
-import { crypto, EIP712Schema, EIP712Utils, generatePseudoRandomSalt } from '@0xproject/order-utils';
+import { crypto, EIP712Schema, EIP712Types, EIP712Utils, generatePseudoRandomSalt } from '@0xproject/order-utils';
import { SignatureType } from '@0xproject/types';
import * as ethUtil from 'ethereumjs-util';
import { signingUtils } from './signing_utils';
import { SignedTransaction } from './types';
-const EIP712_EXECUTE_TRANSACTION_SCHEMA: EIP712Schema = {
- name: 'ExecuteTransaction',
+const EIP712_ZEROEX_TRANSACTION_SCHEMA: EIP712Schema = {
+ name: 'ZeroExTransaction',
parameters: [
- { name: 'salt', type: 'uint256' },
- { name: 'signer', type: 'address' },
- { name: 'data', type: 'bytes' },
+ { name: 'salt', type: EIP712Types.Uint256 },
+ { name: 'signer', type: EIP712Types.Address },
+ { name: 'data', type: EIP712Types.Bytes },
],
};
@@ -24,7 +24,7 @@ export class TransactionFactory {
this._signerBuff = ethUtil.privateToAddress(this._privateKey);
}
public newSignedTransaction(data: string, signatureType: SignatureType = SignatureType.EthSign): SignedTransaction {
- const executeTransactionSchemaHashBuff = EIP712Utils.compileSchema(EIP712_EXECUTE_TRANSACTION_SCHEMA);
+ const executeTransactionSchemaHashBuff = EIP712Utils.compileSchema(EIP712_ZEROEX_TRANSACTION_SCHEMA);
const salt = generatePseudoRandomSalt();
const signer = `0x${this._signerBuff.toString('hex')}`;
const executeTransactionData = {
@@ -33,7 +33,7 @@ export class TransactionFactory {
data,
};
const executeTransactionHashBuff = EIP712Utils.structHash(
- EIP712_EXECUTE_TRANSACTION_SCHEMA,
+ EIP712_ZEROEX_TRANSACTION_SCHEMA,
executeTransactionData,
);
const txHash = EIP712Utils.createEIP712Message(executeTransactionHashBuff, this._exchangeAddress);