Extract resolver api
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@ -0,0 +1,26 @@
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import { BaseProvider } from "@ethersproject/providers";
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import { IAddressResolver } from "./address-resolver";
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export class CompositeAddressResolver implements IAddressResolver {
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private resolvers: IAddressResolver[] = [];
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addResolver(resolver: IAddressResolver) {
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this.resolvers.push(resolver);
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}
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async resolveAddress(
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provider: BaseProvider,
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address: string
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): Promise<string | undefined> {
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for (const r of this.resolvers) {
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const name = r.resolveAddress(provider, address);
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if (name !== undefined) {
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return name;
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}
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}
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return undefined;
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// TODO: fallback to address itself
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// return address;
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}
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}
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@ -0,0 +1,15 @@
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import { BaseProvider } from "@ethersproject/providers";
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import { IAddressResolver } from "./address-resolver";
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export class ENSAddressResolver implements IAddressResolver {
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async resolveAddress(
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provider: BaseProvider,
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address: string
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): Promise<string | undefined> {
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const name = await provider.lookupAddress(address);
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if (name === null) {
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return undefined;
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}
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return name;
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}
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}
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@ -0,0 +1,8 @@
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import { BaseProvider } from "@ethersproject/providers";
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export interface IAddressResolver {
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resolveAddress(
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provider: BaseProvider,
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address: string
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): Promise<string | undefined>;
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}
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@ -0,0 +1,33 @@
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import { BaseProvider } from "@ethersproject/providers";
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import { ENSReverseCache } from "../../types";
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import { IAddressResolver } from "./address-resolver";
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import { CompositeAddressResolver } from "./CompositeAddressResolver";
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import { ENSAddressResolver } from "./ENSAddressResolver";
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// Create and configure the main resolver
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const _mainResolver = new CompositeAddressResolver();
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_mainResolver.addResolver(new ENSAddressResolver());
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export const mainResolver: IAddressResolver = _mainResolver;
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export const batchPopulate = async (
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provider: BaseProvider,
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addresses: string[]
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): Promise<ENSReverseCache> => {
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const solvers: Promise<string | undefined>[] = [];
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for (const a of addresses) {
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solvers.push(mainResolver.resolveAddress(provider, a));
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}
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const results = await Promise.all(solvers);
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const cache: ENSReverseCache = {};
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for (let i = 0; i < results.length; i++) {
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const r = results[i];
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if (r === undefined) {
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continue;
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}
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cache[addresses[i]] = r;
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}
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return cache;
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};
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@ -32,9 +32,7 @@ export type TransactionChunk = {
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lastPage: boolean;
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};
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export type ENSReverseCache = {
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[address: string]: string;
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};
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export type ENSReverseCache = Record<string, string>;
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export type TransactionData = {
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transactionHash: string;
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@ -1,6 +1,7 @@
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import { useState, useEffect } from "react";
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import { JsonRpcProvider } from "@ethersproject/providers";
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import { ENSReverseCache, ProcessedTransaction } from "./types";
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import { batchPopulate } from "./api/address-resolver";
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export const useENSCache = (
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provider?: JsonRpcProvider,
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@ -25,20 +26,7 @@ export const useENSCache = (
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const addresses = Array.from(addrSet);
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const reverseResolve = async () => {
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const solvers: Promise<string | null>[] = [];
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for (const a of addresses) {
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solvers.push(provider.lookupAddress(a));
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}
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const results = await Promise.all(solvers);
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const cache: ENSReverseCache = {};
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for (let i = 0; i < results.length; i++) {
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const r = results[i];
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if (r === null) {
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continue;
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}
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cache[addresses[i]] = r;
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}
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const cache = await batchPopulate(provider, addresses);
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setReverseCache(cache);
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};
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reverseResolve();
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