import { keccak256 } from "../crypto/index.js"; import { concat, dataSlice, getBigInt, getBytes, encodeRlp, assertArgument } from "../utils/index.js"; import { getAddress } from "./address.js"; // http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed /** * Returns the address that would result from a ``CREATE`` for %%tx%%. * * This can be used to compute the address a contract will be * deployed to by an EOA when sending a deployment transaction (i.e. * when the ``to`` address is ``null``). * * This can also be used to compute the address a contract will be * deployed to by a contract, by using the contract's address as the * ``to`` and the contract's nonce. * * @example * from = "0x8ba1f109551bD432803012645Ac136ddd64DBA72"; * nonce = 5; * * getCreateAddress({ from, nonce }); * //_result: */ export function getCreateAddress(tx) { const from = getAddress(tx.from); const nonce = getBigInt(tx.nonce, "tx.nonce"); let nonceHex = nonce.toString(16); if (nonceHex === "0") { nonceHex = "0x"; } else if (nonceHex.length % 2) { nonceHex = "0x0" + nonceHex; } else { nonceHex = "0x" + nonceHex; } return getAddress(dataSlice(keccak256(encodeRlp([from, nonceHex])), 12)); } /** * Returns the address that would result from a ``CREATE2`` operation * with the given %%from%%, %%salt%% and %%initCodeHash%%. * * To compute the %%initCodeHash%% from a contract's init code, use * the [[keccak256]] function. * * For a quick overview and example of ``CREATE2``, see [[link-ricmoo-wisps]]. * * @example * // The address of the contract * from = "0x8ba1f109551bD432803012645Ac136ddd64DBA72" * * // The salt * salt = id("HelloWorld") * * // The hash of the initCode * initCode = "0x6394198df16000526103ff60206004601c335afa6040516060f3"; * initCodeHash = keccak256(initCode) * * getCreate2Address(from, salt, initCodeHash) * //_result: */ export function getCreate2Address(_from, _salt, _initCodeHash) { const from = getAddress(_from); const salt = getBytes(_salt, "salt"); const initCodeHash = getBytes(_initCodeHash, "initCodeHash"); assertArgument(salt.length === 32, "salt must be 32 bytes", "salt", _salt); assertArgument(initCodeHash.length === 32, "initCodeHash must be 32 bytes", "initCodeHash", _initCodeHash); return getAddress(dataSlice(keccak256(concat(["0xff", from, salt, initCodeHash])), 12)); } //# sourceMappingURL=contract-address.js.map