@unstoppabledomains/resolution/build/utils/namehash.js

Domain Resolution for blockchain domains

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getParentDomain = exports.labelNameHash = exports.splitDomainName = exports.fromDecStringToHex = exports.fromHexStringToDecimals = exports.znsChildhash = exports.znsNamehash = exports.eip137Childhash = exports.eip137Namehash = void 0;
var sha256_1 = __importDefault(require("crypto-js/sha256"));
var sha3_1 = __importDefault(require("crypto-js/sha3"));
var enc_hex_1 = __importDefault(require("crypto-js/enc-hex"));
var lib_typedarrays_1 = __importDefault(require("crypto-js/lib-typedarrays"));
var bn_js_1 = __importDefault(require("bn.js"));
var js_sha3_1 = require("js-sha3");
function eip137Namehash(domain) {
    var arr = hashArray(domain, 'sha3');
    return arrayToHex(arr);
}
exports.eip137Namehash = eip137Namehash;
function eip137Childhash(parentHash, label) {
    return childhash(parentHash, label, 'sha3');
}
exports.eip137Childhash = eip137Childhash;
function znsNamehash(domain) {
    var arr = hashArray(domain, 'sha256');
    return arrayToHex(arr);
}
exports.znsNamehash = znsNamehash;
function znsChildhash(parentHash, label) {
    return childhash(parentHash, label, 'sha256');
}
exports.znsChildhash = znsChildhash;
function childhash(parentHash, label, hashingAlgo) {
    var hash = hashingAlgo === 'sha256' ? sha256_1.default : sha3_1.default;
    var opts = { outputLength: 256 };
    var parent = parentHash.replace(/^0x/, '');
    var childHash = enc_hex_1.default.stringify(hash(label, opts));
    return "0x".concat(enc_hex_1.default.stringify(hash(enc_hex_1.default.parse("".concat(parent).concat(childHash)), opts)));
}
function hashArray(domain, hashingAlgo) {
    if (!domain) {
        return lib_typedarrays_1.default.create(Array.from(new Uint8Array(8)));
    }
    var hash = hashingAlgo === 'sha256' ? sha256_1.default : sha3_1.default;
    var opts = { outputLength: 256 };
    var _a = domain.split('.'), label = _a[0], remainder = _a.slice(1);
    var labelHash = hash(label, opts);
    var remainderHash = hashArray(remainder.join('.'), hashingAlgo);
    return hash(remainderHash.concat(labelHash), opts);
}
function arrayToHex(arr) {
    return "0x".concat(enc_hex_1.default.stringify(arr));
}
function fromHexStringToDecimals(value) {
    if (value.startsWith('0x')) {
        var valueWithoutPrefix = value.slice(2, value.length);
        var bn = new bn_js_1.default(valueWithoutPrefix, 16);
        return bn.toString(10);
    }
    return value;
}
exports.fromHexStringToDecimals = fromHexStringToDecimals;
function fromDecStringToHex(value) {
    if (!value.startsWith('0x')) {
        var bn = new bn_js_1.default(value, 10);
        var bnString = bn.toString(16);
        return "0x".concat(bnString.padStart(64, '0'));
    }
    return value;
}
exports.fromDecStringToHex = fromDecStringToHex;
var splitDomainName = function (domain) {
    var splitDomain = domain.split('.');
    var label = splitDomain[0];
    var tld = splitDomain[1];
    if (splitDomain.length - 1 < 2) {
        return { label: label, tld: tld };
    }
    tld = splitDomain[-1];
    label = splitDomain.slice(0, -1).join('.');
    return { label: label, tld: tld };
};
exports.splitDomainName = splitDomainName;
// returns the tokenId of an ens domain name.
// @see https://docs.ens.domains/dapp-developer-guide/ens-as-nft#deriving-tokenid-from-ens-name
var labelNameHash = function (domain) {
    var splitDomain = (0, exports.splitDomainName)(domain);
    var labelHash = (0, js_sha3_1.keccak256)(Buffer.from(splitDomain.label, 'utf8'));
    return "0x".concat(labelHash);
};
exports.labelNameHash = labelNameHash;
var getParentDomain = function (domain) {
    var splitDomain = domain.split('.');
    return "".concat(splitDomain[-2], ".").concat(splitDomain[-1]);
};
exports.getParentDomain = getParentDomain;