BitGo的新版智能合约，create2技术　　GitHub在这里 下面有测试代码，看合约加测试就会了。 这个解决了很多问题，共享经济的等等应用场景。

终于做出来了，代码在这里：

const forwardAddress = ‘0xc9967AD91f3db4c6Ba4A50aC7D74aCa229e4A2C0’; const forwardFactory = ‘0x24F24Fbd10848Eb8F57FaAAF289c06Ad305FF9a3’; const parentAddress = ‘0xAfC28904Fc9fFbA207181e60a183716af4e5bce2’; const util = require(‘ethereumjs-util’); const abi = require(‘ethereumjs-abi’);

const getNextContractAddressCreate2 = (address, salt, initCode) => { const addressBuffer = Buffer.from(util.stripHexPrefix(address), ‘hex’); const initCodeBuffer = Buffer.from(util.stripHexPrefix(initCode), ‘hex’); return util.toChecksumAddress( util.bufferToHex(util.generateAddress2(addressBuffer, salt, initCodeBuffer)) ); };

const getInitCode = (targetAddress) => { const target = util .stripHexPrefix(targetAddress.toLowerCase()) .padStart(40, ‘0’); return 0x3d602d80600a3d3981f3363d3d373d3d3d363d73${target}5af43d82803e903d91602b57fd5bf3; };

const createForwarder = async ( factory, implementationAddress, parent, salt ) => { const inputSalt = util.setLengthLeft( Buffer.from(util.stripHexPrefix(salt), ‘hex’), 32 ); const calculationSalt = abi.soliditySHA3( [‘address’, ‘bytes32’], [parent, inputSalt] ); const initCode = getInitCode( util.stripHexPrefix(implementationAddress) ); const forwarderAddress = getNextContractAddressCreate2( forwardFactory, calculationSalt, initCode ); console.log(parent, inputSalt, inputSalt.toString(‘hex’)); // await factory.createForwarder(parent, inputSalt, { from: sender }); return forwarderAddress; };

const testFirst = async () => { const salt = ‘0x1234’; const _forwarderAddress = await createForwarder( forwardFactory, forwardAddress, parentAddress, salt ); console.log(_forwarderAddress); };

testFirst();

测试结果：下面两个图产生的本地forward地址和未来在链上生成的是一样的： 0xb7A8d9F4524e59eBfdA5BC2a7DE14E4dEA945800