resolver-module-eth/src/resolver.ts

128 lines
2.8 KiB
TypeScript

import {
AbstractResolverModule,
DNS_RECORD_TYPE,
DNSRecord,
DNSResult,
resolverEmptyResponse,
resolverError,
ResolverOptions,
resolveSuccess,
} from "@lumeweb/libresolver";
import { ethers } from "ethers";
import { createClient, createProvider } from "@lumeweb/kernel-eth-client";
// @ts-ignore
import { ENS } from "@ensdomains/ensjs";
const ETH_PROVIDER = createProvider();
// @ts-ignore
ETH_PROVIDER._isProvider = true;
const ETH_SIGNER = new ethers.VoidSigner(ethers.ZeroAddress, ETH_PROVIDER);
// @ts-ignore
ETH_SIGNER._isSigner = true;
// @ts-ignore
ETH_PROVIDER.getSigner = () => ETH_SIGNER;
let ENSInstance: ENS;
const ETH_CLIENT = createClient();
async function getEns() {
if (!ENSInstance) {
ENSInstance = new ENS({
graphURI: null,
});
await ENSInstance.setProvider(ETH_PROVIDER as any);
}
return ENSInstance;
}
export default class Eth extends AbstractResolverModule {
// @ts-ignore
getSupportedTlds(): string[] {
return ["eth"];
}
async resolve(
domain: string,
options: ResolverOptions,
bypassCache: boolean,
): Promise<DNSResult> {
const hip5Data = domain.split(".");
if (
2 <= hip5Data.length &&
options.options &&
"domain" in options.options
) {
if (ethers.isAddress(hip5Data[0])) {
let chain = hip5Data[1].replace("_", "");
domain = options.options.domain;
if (chain !== "eth") {
return resolverError("HIP5 chain not supported");
}
return this.resolve137(domain, options, bypassCache);
}
}
if (await this.isTldSupported(domain)) {
return this.resolve137(domain, options, bypassCache);
}
return resolverEmptyResponse();
}
private async resolve137(
domain: string,
options: ResolverOptions,
bypassCache: boolean,
): Promise<DNSResult> {
const records: DNSRecord[] = [];
const ens = await getEns();
let content;
if (
[DNS_RECORD_TYPE.CONTENT, DNS_RECORD_TYPE.TEXT].includes(options.type)
) {
try {
content = await ens.getContentHash(domain);
} catch (e: any) {
return resolverError(e);
}
records.push({
type: DNS_RECORD_TYPE.CONTENT,
value: `${content.protocolType}://${content.decoded}` as string,
});
}
if ([DNS_RECORD_TYPE.CUSTOM].includes(options.type)) {
let text;
try {
text = await ens.getText(domain, options.customType as string);
} catch (e: any) {
return resolverError(e);
}
records.push({
type: options.type,
customType: options.customType,
value: text as string,
});
}
if (0 < records.length) {
return resolveSuccess(records);
}
return resolverEmptyResponse();
}
async ready(): Promise<void> {
return ((await ETH_CLIENT.status()) as any)?.ready;
}
}