ethers.js/packages/providers/src.ts/alchemy-provider.ts

"use strict";

import { Network } from "@ethersproject/networks";

import { Logger } from "@ethersproject/logger";
import { version } from "./_version";
const logger = new Logger(version);

import { UrlJsonRpcProvider } from "./url-json-rpc-provider";

// This key was provided to ethers.js by Alchemy to be used by the
// default provider, but it is recommended that for your own
// production environments, that you acquire your own API key at:
//   https://dashboard.alchemyapi.io

const defaultApiKey = "_gg7wSSi0KMBsdKnGVfHDueq6xMB9EkC"

export class AlchemyProvider extends UrlJsonRpcProvider {
    readonly apiKey: string;

    static getApiKey(apiKey: any): any {
        if (apiKey == null) { return defaultApiKey; }
        if (apiKey && typeof(apiKey) !== "string") {
            logger.throwArgumentError("invalid apiKey", "apiKey", apiKey);
        }
        return apiKey;
    }

    static getUrl(network: Network, apiKey: string): string {
        let host = null;
        switch (network.name) {
            case "homestead":
                host = "eth-mainnet.alchemyapi.io/jsonrpc/";
                break;
            case "ropsten":
                host = "eth-ropsten.alchemyapi.io/jsonrpc/";
                break;
            case "rinkeby":
                host = "eth-rinkeby.alchemyapi.io/jsonrpc/";
                break;
            case "goerli":
                host = "eth-goerli.alchemyapi.io/jsonrpc/";
                break;
            case "kovan":
                host = "eth-kovan.alchemyapi.io/jsonrpc/";
                break;
            default:
               logger.throwArgumentError("unsupported network", "network", arguments[0]);
        }

        return ("https:/" + "/" + host + apiKey);
    }
}