82 lines
2.9 KiB
JavaScript
82 lines
2.9 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.namehash = namehash;
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const sha3_1 = require("@noble/hashes/sha3");
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const utils_1 = require("@noble/hashes/utils");
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const decoder_ts_1 = require("../abi/decoder.js");
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const utils_ts_1 = require("../utils.js");
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// No support for IDN names
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function namehash(address) {
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let res = new Uint8Array(32);
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if (!address)
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return res;
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for (let label of address.split('.').reverse())
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res = (0, sha3_1.keccak_256)((0, utils_1.concatBytes)(res, (0, sha3_1.keccak_256)(label)));
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return res;
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}
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class ENS {
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constructor(net) {
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this.net = net;
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}
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async getResolver(name) {
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const contract = (0, decoder_ts_1.createContract)(ENS.REGISTRY_CONTRACT, this.net, ENS.REGISTRY);
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const res = await contract.resolver.call(namehash(name));
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if (res === ENS.ADDRESS_ZERO)
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return;
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return res;
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}
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async nameToAddress(name) {
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const resolver = await this.getResolver(name);
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if (!resolver)
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return;
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const contract = (0, decoder_ts_1.createContract)(ENS.RESOLVER_CONTRACT, this.net, resolver);
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const addr = await contract.addr.call(namehash(name));
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if (addr === ENS.ADDRESS_ZERO)
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return;
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return addr;
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}
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async addressToName(address) {
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const addrDomain = `${(0, utils_ts_1.strip0x)(address).toLowerCase()}.addr.reverse`;
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const resolver = await this.getResolver(addrDomain);
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if (!resolver)
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return;
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const contract = (0, decoder_ts_1.createContract)(ENS.RESOLVER_CONTRACT, this.net, resolver);
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const name = await contract.name.call(namehash(addrDomain));
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if (!name)
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return;
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// From spec: ENS does not enforce accuracy of reverse records -
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// anyone may claim that the name for their address is 'alice.eth'.
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// To be certain the claim is accurate, you must always perform a forward
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// resolution for the returned name and check whether it matches the original address.
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const realAddr = await this.nameToAddress(name);
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if (realAddr !== address)
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return;
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return name;
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}
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}
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ENS.ADDRESS_ZERO = '0x0000000000000000000000000000000000000000';
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ENS.REGISTRY = '0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e';
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ENS.REGISTRY_CONTRACT = [
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{
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name: 'resolver',
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type: 'function',
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inputs: [{ name: 'node', type: 'bytes32' }],
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outputs: [{ type: 'address' }],
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},
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];
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ENS.RESOLVER_CONTRACT = [
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{
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name: 'addr',
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type: 'function',
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inputs: [{ name: 'node', type: 'bytes32' }],
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outputs: [{ type: 'address' }],
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},
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{
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name: 'name',
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type: 'function',
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inputs: [{ name: 'node', type: 'bytes32' }],
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outputs: [{ type: 'string' }],
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},
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];
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exports.default = ENS;
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//# sourceMappingURL=ens.js.map
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