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Текущая директория: /var/www/bitcardoApp/node_modules/ethers/lib.commonjs/hash
Просмотр файла: namehash.js
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.dnsEncode = exports.namehash = exports.isValidName = exports.ensNormalize = void 0;
const index_js_1 = require("../crypto/index.js");
const index_js_2 = require("../utils/index.js");
const ens_normalize_1 = require("@adraffy/ens-normalize");
const Zeros = new Uint8Array(32);
Zeros.fill(0);
function checkComponent(comp) {
(0, index_js_2.assertArgument)(comp.length !== 0, "invalid ENS name; empty component", "comp", comp);
return comp;
}
function ensNameSplit(name) {
const bytes = (0, index_js_2.toUtf8Bytes)(ensNormalize(name));
const comps = [];
if (name.length === 0) {
return comps;
}
let last = 0;
for (let i = 0; i < bytes.length; i++) {
const d = bytes[i];
// A separator (i.e. "."); copy this component
if (d === 0x2e) {
comps.push(checkComponent(bytes.slice(last, i)));
last = i + 1;
}
}
// There was a stray separator at the end of the name
(0, index_js_2.assertArgument)(last < bytes.length, "invalid ENS name; empty component", "name", name);
comps.push(checkComponent(bytes.slice(last)));
return comps;
}
/**
* Returns the ENS %%name%% normalized.
*/
function ensNormalize(name) {
try {
if (name.length === 0) {
throw new Error("empty label");
}
return (0, ens_normalize_1.ens_normalize)(name);
}
catch (error) {
(0, index_js_2.assertArgument)(false, `invalid ENS name (${error.message})`, "name", name);
}
}
exports.ensNormalize = ensNormalize;
/**
* Returns ``true`` if %%name%% is a valid ENS name.
*/
function isValidName(name) {
try {
return (ensNameSplit(name).length !== 0);
}
catch (error) { }
return false;
}
exports.isValidName = isValidName;
/**
* Returns the [[link-namehash]] for %%name%%.
*/
function namehash(name) {
(0, index_js_2.assertArgument)(typeof (name) === "string", "invalid ENS name; not a string", "name", name);
(0, index_js_2.assertArgument)(name.length, `invalid ENS name (empty label)`, "name", name);
let result = Zeros;
const comps = ensNameSplit(name);
while (comps.length) {
result = (0, index_js_1.keccak256)((0, index_js_2.concat)([result, (0, index_js_1.keccak256)((comps.pop()))]));
}
return (0, index_js_2.hexlify)(result);
}
exports.namehash = namehash;
/**
* Returns the DNS encoded %%name%%.
*
* This is used for various parts of ENS name resolution, such
* as the wildcard resolution.
*/
function dnsEncode(name, _maxLength) {
const length = (_maxLength != null) ? _maxLength : 63;
(0, index_js_2.assertArgument)(length <= 255, "DNS encoded label cannot exceed 255", "length", length);
return (0, index_js_2.hexlify)((0, index_js_2.concat)(ensNameSplit(name).map((comp) => {
(0, index_js_2.assertArgument)(comp.length <= length, `label ${JSON.stringify(name)} exceeds ${length} bytes`, "name", name);
const bytes = new Uint8Array(comp.length + 1);
bytes.set(comp, 1);
bytes[0] = bytes.length - 1;
return bytes;
}))) + "00";
}
exports.dnsEncode = dnsEncode;
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