thor-devkit/dist/address.js

Typescript library to aid DApp development on VeChain Thor

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.address = void 0;
const keccak_1 = require("./keccak");
/** address related utilities */
var address;
(function (address) {
    /**
     * derive Address from public key, note that the public key is uncompressed
     * @param pub the public key
     */
    function fromPublicKey(pub) {
        return '0x' + keccak_1.keccak256(pub.slice(1)).slice(12).toString('hex');
    }
    address.fromPublicKey = fromPublicKey;
    /**
     * to check if a value presents an address
     * @param v the value to be checked
     */
    function test(v) {
        return typeof v === 'string' && /^0x[0-9a-f]{40}$/i.test(v);
    }
    address.test = test;
    /**
     * encode the address to checksumed address that is compatible with eip-55
     * @param address input address
     */
    function toChecksumed(addr) {
        if (!test(addr)) {
            throw new Error('invalid address');
        }
        addr = addr.slice(2).toLowerCase();
        const hash = keccak_1.keccak256(addr);
        let checksumed = '0x';
        for (let i = 0; i < addr.length; i++) {
            // tslint:disable-next-line:no-bitwise
            let byte = hash[i >> 1];
            if (i % 2 === 0) {
                // tslint:disable-next-line:no-bitwise
                byte >>= 4;
            }
            if (byte % 16 >= 8) {
                checksumed += addr[i].toUpperCase();
            }
            else {
                checksumed += addr[i];
            }
        }
        return checksumed;
    }
    address.toChecksumed = toChecksumed;
})(address = exports.address || (exports.address = {}));
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