56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.dnsEncode = exports.namehash = exports.isValidName = void 0;
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var bytes_1 = require("@ethersproject/bytes");
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var strings_1 = require("@ethersproject/strings");
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var keccak256_1 = require("@ethersproject/keccak256");
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var logger_1 = require("@ethersproject/logger");
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var _version_1 = require("./_version");
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var logger = new logger_1.Logger(_version_1.version);
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var Zeros = new Uint8Array(32);
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Zeros.fill(0);
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var Partition = new RegExp("^((.*)\\.)?([^.]+)$");
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function isValidName(name) {
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try {
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var comps = name.split(".");
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for (var i = 0; i < comps.length; i++) {
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if ((0, strings_1.nameprep)(comps[i]).length === 0) {
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throw new Error("empty");
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}
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}
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return true;
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}
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catch (error) { }
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return false;
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}
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exports.isValidName = isValidName;
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function namehash(name) {
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/* istanbul ignore if */
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if (typeof (name) !== "string") {
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logger.throwArgumentError("invalid ENS name; not a string", "name", name);
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}
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var current = name;
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var result = Zeros;
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while (current.length) {
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var partition = current.match(Partition);
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if (partition == null || partition[2] === "") {
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logger.throwArgumentError("invalid ENS address; missing component", "name", name);
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}
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var label = (0, strings_1.toUtf8Bytes)((0, strings_1.nameprep)(partition[3]));
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result = (0, keccak256_1.keccak256)((0, bytes_1.concat)([result, (0, keccak256_1.keccak256)(label)]));
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current = partition[2] || "";
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}
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return (0, bytes_1.hexlify)(result);
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}
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exports.namehash = namehash;
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function dnsEncode(name) {
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return (0, bytes_1.hexlify)((0, bytes_1.concat)(name.split(".").map(function (comp) {
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// We jam in an _ prefix to fill in with the length later
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// Note: Nameprep throws if the component is over 63 bytes
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var bytes = (0, strings_1.toUtf8Bytes)("_" + (0, strings_1.nameprep)(comp));
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bytes[0] = bytes.length - 1;
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return bytes;
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}))) + "00";
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}
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exports.dnsEncode = dnsEncode;
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//# sourceMappingURL=namehash.js.map
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