ethers.js/src.ts/providers/default-provider.ts

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2022-09-05 23:14:43 +03:00
import { AnkrProvider } from "./provider-ankr.js";
import { AlchemyProvider } from "./provider-alchemy.js";
import { CloudflareProvider } from "./provider-cloudflare.js";
import { EtherscanProvider } from "./provider-etherscan.js";
import { InfuraProvider } from "./provider-infura.js";
//import { PocketProvider } from "./provider-pocket.js";
import { FallbackProvider } from "./provider-fallback.js";
import { JsonRpcProvider } from "./provider-jsonrpc.js";
import { WebSocketProvider } from "./provider-websocket.js";
import type { AbstractProvider } from "./abstract-provider.js";
import type { Networkish } from "./network.js";
import { WebSocketLike } from "./provider-websocket.js";
function isWebSocketLike(value: any): value is WebSocketLike {
return (value && typeof(value.send) === "function" &&
typeof(value.close) === "function");
}
export function getDefaultProvider(network: string | Networkish | WebSocketLike, options?: any): AbstractProvider {
if (options == null) { options = { }; }
if (typeof(network) === "string" && network.match(/^https?:/)) {
return new JsonRpcProvider(network);
}
if (typeof(network) === "string" && network.match(/^wss?:/) || isWebSocketLike(network)) {
return new WebSocketProvider(network);
}
const providers: Array<AbstractProvider> = [ ];
if (options.alchemy !== "-") {
try {
providers.push(new AlchemyProvider(network, options.alchemy));
} catch (error) { console.log(error); }
}
if (options.ankr !== "-") {
try {
providers.push(new AnkrProvider(network, options.ankr));
} catch (error) { console.log(error); }
}
if (options.cloudflare !== "-") {
try {
providers.push(new CloudflareProvider(network));
} catch (error) { console.log(error); }
}
if (options.etherscan !== "-") {
try {
providers.push(new EtherscanProvider(network, options.etherscan));
} catch (error) { console.log(error); }
}
if (options.infura !== "-") {
try {
let projectId = options.infura;
let projectSecret: undefined | string = undefined;
if (typeof(projectId) === "object") {
projectSecret = projectId.projectSecret;
projectId = projectId.projectId;
}
providers.push(new InfuraProvider(network, projectId, projectSecret));
} catch (error) { console.log(error); }
}
/*
if (options.pocket !== "-") {
try {
let appId = options.pocket;
let secretKey: undefined | string = undefined;
let loadBalancer: undefined | boolean = undefined;
if (typeof(appId) === "object") {
loadBalancer = !!appId.loadBalancer;
secretKey = appId.secretKey;
appId = appId.appId;
}
providers.push(new PocketProvider(network, appId, secretKey, loadBalancer));
} catch (error) { console.log(error); }
}
*/
if (providers.length === 0) { throw new Error("TODO"); }
if (providers.length === 1) { return providers[0]; }
return new FallbackProvider(providers);
}