计算合约地址

EVM会根据发送者地址和nonce经过RLP编码后再进行keccak256得到hash的低160位(即96到255)共计20字节作为生成合约的地址

const rlp = require("rlp");
const keccak = require("keccak");
function calculateContractAddr(sender,nonce){
    // var nonce = 0x00; //The nonce must be a hex literal!
    // var sender = "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"; //Requires a hex string as input!

    var input_arr = [sender, nonce];
    var rlp_encoded = rlp.encode(input_arr);

    var contract_address_long = keccak("keccak256")
    .update(rlp_encoded)
    .digest("hex");

    var contract_address = contract_address_long.substring(24); //Trim the first 24 characters.
    console.log("contract_address: " + contract_address);
}