79 lines
2.7 KiB
JavaScript
79 lines
2.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.dnsEncode = exports.namehash = exports.isValidName = exports.ensNormalize = 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 lib_1 = require("./ens-normalize/lib");
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var Zeros = new Uint8Array(32);
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Zeros.fill(0);
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function checkComponent(comp) {
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if (comp.length === 0) {
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throw new Error("invalid ENS name; empty component");
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}
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return comp;
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}
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function ensNameSplit(name) {
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var bytes = (0, strings_1.toUtf8Bytes)((0, lib_1.ens_normalize)(name));
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var comps = [];
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if (name.length === 0) {
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return comps;
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}
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var last = 0;
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for (var i = 0; i < bytes.length; i++) {
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var d = bytes[i];
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// A separator (i.e. "."); copy this component
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if (d === 0x2e) {
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comps.push(checkComponent(bytes.slice(last, i)));
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last = i + 1;
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}
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}
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// There was a stray separator at the end of the name
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if (last >= bytes.length) {
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throw new Error("invalid ENS name; empty component");
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}
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comps.push(checkComponent(bytes.slice(last)));
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return comps;
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}
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function ensNormalize(name) {
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return ensNameSplit(name).map(function (comp) { return (0, strings_1.toUtf8String)(comp); }).join(".");
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}
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exports.ensNormalize = ensNormalize;
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function isValidName(name) {
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try {
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return (ensNameSplit(name).length !== 0);
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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 result = Zeros;
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var comps = ensNameSplit(name);
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while (comps.length) {
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result = (0, keccak256_1.keccak256)((0, bytes_1.concat)([result, (0, keccak256_1.keccak256)(comps.pop())]));
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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)(ensNameSplit(name).map(function (comp) {
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// DNS does not allow components over 63 bytes in length
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if (comp.length > 63) {
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throw new Error("invalid DNS encoded entry; length exceeds 63 bytes");
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}
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var bytes = new Uint8Array(comp.length + 1);
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bytes.set(comp, 1);
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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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