import { keccak256 } from "../crypto/index.js"; import { MessagePrefix } from "../constants/index.js"; import { recoverAddress } from "../transaction/index.js"; import { concat, toUtf8Bytes } from "../utils/index.js"; /** * Computes the [[link-eip-191]] personal-sign message digest to sign. * * This prefixes the message with [[MessagePrefix]] and the decimal length * of %%message%% and computes the [[keccak256]] digest. * * If %%message%% is a string, it is converted to its UTF-8 bytes * first. To compute the digest of a [[DataHexString]], it must be converted * to [bytes](getBytes). * * @example: * hashMessage("Hello World") * //_result: * * // Hashes the SIX (6) string characters, i.e. * // [ "0", "x", "4", "2", "4", "3" ] * hashMessage("0x4243") * //_result: * * // Hashes the TWO (2) bytes [ 0x42, 0x43 ]... * hashMessage(getBytes("0x4243")) * //_result: * * // ...which is equal to using data * hashMessage(new Uint8Array([ 0x42, 0x43 ])) * //_result: * */ export function hashMessage(message) { if (typeof (message) === "string") { message = toUtf8Bytes(message); } return keccak256(concat([ toUtf8Bytes(MessagePrefix), toUtf8Bytes(String(message.length)), message ])); } export function verifyMessage(message, sig) { const digest = hashMessage(message); return recoverAddress(digest, sig); } //# sourceMappingURL=message.js.map