Created
June 2, 2019 08:13
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Compute contract address in solidity
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| pragma solidity ^0.4.25; | |
| contract ComputeContractAddress | |
| { | |
| function addressFrom(address _origin, uint _nonce) public pure returns (address) { | |
| bytes memory data; | |
| if(_nonce == 0x00) data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(0x80)); | |
| else if(_nonce <= 0x7f) data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(_nonce)); | |
| else if(_nonce <= 0xff) data = abi.encodePacked(byte(0xd7), byte(0x94), _origin, byte(0x81), uint8(_nonce)); | |
| else if(_nonce <= 0xffff) data = abi.encodePacked(byte(0xd8), byte(0x94), _origin, byte(0x82), uint16(_nonce)); | |
| else if(_nonce <= 0xffffff) data = abi.encodePacked(byte(0xd9), byte(0x94), _origin, byte(0x83), uint24(_nonce)); | |
| else data = abi.encodePacked(byte(0xda), byte(0x94), _origin, byte(0x84), uint32(_nonce)); | |
| return address(keccak256(data)); | |
| } | |
| } |
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