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author | Fabio Berger <me@fabioberger.com> | 2018-08-15 05:21:47 +0800 |
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committer | Fabio Berger <me@fabioberger.com> | 2018-08-15 05:21:47 +0800 |
commit | 2f2582a0da3095d61a99ef09744dc0995677558e (patch) | |
tree | 54989565919038c42d495dafb7426d4148605e84 /packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol | |
parent | 8169155a6547fb0283cd0f5362aad3c0b173b00b (diff) | |
parent | fadd292ecf367e42154856509d0ea0c20b23f2f1 (diff) | |
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Merge development
Diffstat (limited to 'packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol | 30 |
1 files changed, 25 insertions, 5 deletions
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 index 1fc41dafd..b02f7632e 100644 --- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol +++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol @@ -30,7 +30,7 @@ contract LibEIP712 { string constant internal EIP712_DOMAIN_VERSION = "2"; // Hash of the EIP712 Domain Separator Schema - bytes32 public constant EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked( + bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked( "EIP712Domain(", "string name,", "string version,", @@ -45,11 +45,11 @@ contract LibEIP712 { constructor () public { - EIP712_DOMAIN_HASH = keccak256(abi.encode( + EIP712_DOMAIN_HASH = keccak256(abi.encodePacked( EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH, keccak256(bytes(EIP712_DOMAIN_NAME)), keccak256(bytes(EIP712_DOMAIN_VERSION)), - address(this) + bytes32(address(this)) )); } @@ -59,8 +59,28 @@ contract LibEIP712 { function hashEIP712Message(bytes32 hashStruct) internal view - returns (bytes32) + returns (bytes32 result) { - return keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, hashStruct)); + bytes32 eip712DomainHash = EIP712_DOMAIN_HASH; + + // Assembly for more efficient computing: + // keccak256(abi.encodePacked( + // EIP191_HEADER, + // EIP712_DOMAIN_HASH, + // hashStruct + // )); + + assembly { + // Load free memory pointer + let memPtr := mload(64) + + mstore(memPtr, 0x1901000000000000000000000000000000000000000000000000000000000000) // EIP191 header + mstore(add(memPtr, 2), eip712DomainHash) // EIP712 domain hash + mstore(add(memPtr, 34), hashStruct) // Hash of struct + + // Compute hash + result := keccak256(memPtr, 66) + } + return result; } } |