import { AlchemyProvider, AnkrProvider, // CloudflareProvider, EtherscanProvider, InfuraProvider, PocketProvider, QuickNodeProvider, FallbackProvider, isError, } from "../index.js"; import type { AbstractProvider } from "../index.js"; interface ProviderCreator { name: string; networks: Array; create: (network: string) => null | AbstractProvider; }; const ethNetworks = [ "default", "mainnet", "goerli" ]; //const maticNetworks = [ "matic", "maticmum" ]; const ProviderCreators: Array = [ { name: "AlchemyProvider", networks: ethNetworks, create: function(network: string) { return new AlchemyProvider(network, "YrPw6SWb20vJDRFkhWq8aKnTQ8JRNRHM"); } }, { name: "AnkrProvider", networks: ethNetworks.concat([ "matic", "arbitrum" ]), create: function(network: string) { return new AnkrProvider(network); } }, /* { name: "CloudflareProvider", networks: [ "default", "mainnet" ], create: function(network: string) { return new CloudflareProvider(network); } }, */ { name: "EtherscanProvider", networks: ethNetworks, create: function(network: string) { return new EtherscanProvider(network, "FPFGK6JSW2UHJJ2666FG93KP7WC999MNW7"); } }, { name: "InfuraProvider", networks: ethNetworks, create: function(network: string) { return new InfuraProvider(network, "49a0efa3aaee4fd99797bfa94d8ce2f1"); } }, { name: "InfuraWebsocketProvider", networks: ethNetworks, create: function(network: string) { return InfuraProvider.getWebSocketProvider(network, "49a0efa3aaee4fd99797bfa94d8ce2f1"); } }, { name: "PocketProvider", networks: ethNetworks, create: function(network: string) { return new PocketProvider(network); } }, { name: "QuickNodeProvider", networks: ethNetworks, create: function(network: string) { return new QuickNodeProvider(network); } }, { name: "FallbackProvider", networks: ethNetworks, create: function(network: string) { const providers: Array = []; for (const providerName of [ "AlchemyProvider", "AnkrProvider", "EtherscanProvider", "InfuraProvider" ]) { const provider = getProvider(providerName, network); if (provider) { providers.push(provider); } } if (providers.length === 0) { throw new Error("UNSUPPORTED NETWORK"); } return new FallbackProvider(providers); } }, ]; let setup = false; const cleanup: Array<() => void> = [ ]; export function setupProviders(): void { after(function() { for (const func of cleanup) { func(); } }); setup = true; } export const providerNames = Object.freeze(ProviderCreators.map((c) => (c.name))); function getCreator(provider: string): null | ProviderCreator { const creators = ProviderCreators.filter((c) => (c.name === provider)); if (creators.length === 1) { return creators[0]; } return null; } export function getProviderNetworks(provider: string): Array { const creator = getCreator(provider); if (creator) { return creator.networks; } return [ ]; } export function getProvider(provider: string, network: string): null | AbstractProvider { if (setup == false) { throw new Error("MUST CALL setupProviders in root context"); } const creator = getCreator(provider); try { if (creator) { const provider = creator.create(network); if (provider) { cleanup.push(() => { provider.destroy(); }); } return provider; } } catch (error) { if (!isError(error, "INVALID_ARGUMENT")) { throw error; } } return null; } export function checkProvider(provider: string, network: string): boolean { const creator = getCreator(provider); return (creator != null); } export function connect(network: string): AbstractProvider { const provider = getProvider("InfuraProvider", network); if (provider == null) { throw new Error(`could not connect to ${ network }`); } return provider; }