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Текущая директория: /var/www/bitcardoApp/node_modules/ethers/src.ts/providers
Просмотр файла: default-provider.ts
import { assert } from "../utils/index.js";
import { AnkrProvider } from "./provider-ankr.js";
import { AlchemyProvider } from "./provider-alchemy.js";
import { ChainstackProvider } from "./provider-chainstack.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 { QuickNodeProvider } from "./provider-quicknode.js";
import { FallbackProvider } from "./provider-fallback.js";
import { JsonRpcProvider } from "./provider-jsonrpc.js";
import { Network } from "./network.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");
}
const Testnets = "goerli kovan sepolia classicKotti optimism-goerli arbitrum-goerli matic-mumbai bnbt".split(" ");
/**
* Returns a default provider for %%network%%.
*
* If %%network%% is a [[WebSocketLike]] or string that begins with
* ``"ws:"`` or ``"wss:"``, a [[WebSocketProvider]] is returned backed
* by that WebSocket or URL.
*
* If %%network%% is a string that begins with ``"HTTP:"`` or ``"HTTPS:"``,
* a [[JsonRpcProvider]] is returned connected to that URL.
*
* Otherwise, a default provider is created backed by well-known public
* Web3 backends (such as [[link-infura]]) using community-provided API
* keys.
*
* The %%options%% allows specifying custom API keys per backend (setting
* an API key to ``"-"`` will omit that provider) and ``options.exclusive``
* can be set to either a backend name or and array of backend names, which
* will whitelist **only** those backends.
*
* Current backend strings supported are:
* - ``"alchemy"``
* - ``"ankr"``
* - ``"cloudflare"``
* - ``"chainstack"``
* - ``"etherscan"``
* - ``"infura"``
* - ``"publicPolygon"``
* - ``"quicknode"``
*
* @example:
* // Connect to a local Geth node
* provider = getDefaultProvider("http://localhost:8545/");
*
* // Connect to Ethereum mainnet with any current and future
* // third-party services available
* provider = getDefaultProvider("mainnet");
*
* // Connect to Polygon, but only allow Etherscan and
* // INFURA and use "MY_API_KEY" in calls to Etherscan.
* provider = getDefaultProvider("matic", {
* etherscan: "MY_API_KEY",
* exclusive: [ "etherscan", "infura" ]
* });
*/
export function getDefaultProvider(network?: string | Networkish | WebSocketLike, options?: any): AbstractProvider {
if (options == null) { options = { }; }
const allowService = (name: string) => {
if (options[name] === "-") { return false; }
if (typeof(options.exclusive) === "string") {
return (name === options.exclusive);
}
if (Array.isArray(options.exclusive)) {
return (options.exclusive.indexOf(name) !== -1);
}
return true;
};
if (typeof(network) === "string" && network.match(/^https?:/)) {
return new JsonRpcProvider(network);
}
if (typeof(network) === "string" && network.match(/^wss?:/) || isWebSocketLike(network)) {
return new WebSocketProvider(network);
}
// Get the network and name, if possible
let staticNetwork: null | Network = null;
try {
staticNetwork = Network.from(network);
} catch (error) { }
const providers: Array<AbstractProvider> = [ ];
if (allowService("publicPolygon") && staticNetwork) {
if (staticNetwork.name === "matic") {
providers.push(new JsonRpcProvider("https:/\/polygon-rpc.com/", staticNetwork, { staticNetwork }));
} else if (staticNetwork.name === "matic-amoy") {
providers.push(new JsonRpcProvider("https:/\/rpc-amoy.polygon.technology/", staticNetwork, { staticNetwork }));
}
}
if (allowService("alchemy")) {
try {
providers.push(new AlchemyProvider(network, options.alchemy));
} catch (error) { }
}
if (allowService("ankr") && options.ankr != null) {
try {
providers.push(new AnkrProvider(network, options.ankr));
} catch (error) { }
}
if (allowService("chainstack")) {
try {
providers.push(new ChainstackProvider(network, options.chainstack));
} catch (error) { }
}
if (allowService("cloudflare")) {
try {
providers.push(new CloudflareProvider(network));
} catch (error) { }
}
if (allowService("etherscan")) {
try {
providers.push(new EtherscanProvider(network, options.etherscan));
} catch (error) { }
}
if (allowService("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) { }
}
/*
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 (allowService("quicknode")) {
try {
let token = options.quicknode;
providers.push(new QuickNodeProvider(network, token));
} catch (error) { }
}
assert(providers.length, "unsupported default network", "UNSUPPORTED_OPERATION", {
operation: "getDefaultProvider"
});
// No need for a FallbackProvider
if (providers.length === 1) { return providers[0]; }
// We use the floor because public third-party providers can be unreliable,
// so a low number of providers with a large quorum will fail too often
let quorum = Math.floor(providers.length / 2);
if (quorum > 2) { quorum = 2; }
// Testnets don't need as strong a security gaurantee and speed is
// more useful during testing
if (staticNetwork && Testnets.indexOf(staticNetwork.name) !== -1) { quorum = 1; }
// Provided override qorum takes priority
if (options && options.quorum) { quorum = options.quorum; }
return new FallbackProvider(providers, undefined, { quorum });
}
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