web3x
Version:
Typescript port of web3.js
42 lines (39 loc) • 2.91 kB
JavaScript
;
/*
This file is part of web3x.
web3x is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
web3x is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with web3x. If not, see <http://www.gnu.org/licenses/>.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
const idna_uts46_hx_1 = tslib_1.__importDefault(require("idna-uts46-hx"));
const utils_1 = require("../../utils");
function namehash(inputName) {
// Reject empty names:
let node = '';
for (let i = 0; i < 32; i++) {
node += '00';
}
const name = normalize(inputName);
if (name) {
const labels = name.split('.');
for (let i = labels.length - 1; i >= 0; i--) {
const labelSha = utils_1.sha3(labels[i]).slice(2);
node = utils_1.sha3(new Buffer(node + labelSha, 'hex')).slice(2);
}
}
return '0x' + node;
}
exports.namehash = namehash;
function normalize(name) {
return name ? idna_uts46_hx_1.default.toAscii(name, { useStd3ASCII: true, transitional: false }) : name;
}
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