//Write your own contracts here. Currently compiles using solc v0.4.15+commit.bbb8e64f. pragma solidity ^0.4.18; contract SimpleStore { function addressFrom(address _origin, uint _nonce) public pure returns (address) { if(_nonce == 0x00) return address(keccak256(byte(0xd6), byte(0x94), _origin, byte(0x80))); if(_nonce <= 0x7f) return address(keccak256(byte(0xd6), byte(0x94), _origin, byte(_nonce))); if(_nonce <= 0xff) return address(keccak256(byte(0xd7), byte(0x94), _origin, byte(0x81), uint8(_nonce))); if(_nonce <= 0xffff) return address(keccak256(byte(0xd8), byte(0x94), _origin, byte(0x82), uint16(_nonce))); if(_nonce <= 0xffffff) return address(keccak256(byte(0xd9), byte(0x94), _origin, byte(0x83), uint24(_nonce))); return address(keccak256(byte(0xda), byte(0x94), _origin, byte(0x84), uint32(_nonce))); // more than 2^32 nonces not realistic } } 0.4.18