ethers.js/lib.esm/_tests/create-provider.js

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import { AlchemyProvider, AnkrProvider, CloudflareProvider, EtherscanProvider, InfuraProvider,
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// PocketProvider,
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FallbackProvider, isError, } from "../index.js";
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;
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const ethNetworks = ["default", "mainnet", "goerli"];
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//const maticNetworks = [ "matic", "maticmum" ];
const ProviderCreators = [
{
name: "AlchemyProvider",
networks: ethNetworks,
create: function (network) {
return new AlchemyProvider(network, "YrPw6SWb20vJDRFkhWq8aKnTQ8JRNRHM");
}
},
{
name: "AnkrProvider",
networks: ethNetworks.concat(["matic", "arbitrum"]),
create: function (network) {
return new AnkrProvider(network);
}
},
{
name: "CloudflareProvider",
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networks: ["default", "mainnet"],
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create: function (network) {
return new CloudflareProvider(network);
}
},
{
name: "EtherscanProvider",
networks: ethNetworks,
create: function (network) {
return new EtherscanProvider(network, "FPFGK6JSW2UHJJ2666FG93KP7WC999MNW7");
}
},
{
name: "InfuraProvider",
networks: ethNetworks,
create: function (network) {
return new InfuraProvider(network, "49a0efa3aaee4fd99797bfa94d8ce2f1");
}
},
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{
name: "InfuraWebsocketProvider",
networks: ethNetworks,
create: function (network) {
return InfuraProvider.getWebSocketProvider(network, "49a0efa3aaee4fd99797bfa94d8ce2f1");
}
},
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/*
{
name: "PocketProvider",
networks: ethNetworks,
create: function(network: string) {
const apiKeys: Record<string, string> = {
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mainnet: "6004bcd10040261633ade990",
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ropsten: "6004bd4d0040261633ade991",
rinkeby: "6004bda20040261633ade994",
goerli: "6004bd860040261633ade992",
};
return new PocketProvider(network, apiKeys[network]);
}
},
*/
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{
name: "FallbackProvider",
networks: ethNetworks,
create: function (network) {
const providers = [];
for (const providerName of ["AlchemyProvider", "AnkrProvider", "EtherscanProvider", "InfuraProvider"]) {
const provider = getProvider(providerName, network);
if (provider) {
providers.push(provider);
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}
}
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if (providers.length === 0) {
throw new Error("UNSUPPORTED NETWORK");
}
return new FallbackProvider(providers);
}
},
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];
export const providerNames = Object.freeze(ProviderCreators.map((c) => (c.name)));
function getCreator(provider) {
const creators = ProviderCreators.filter((c) => (c.name === provider));
if (creators.length === 1) {
return creators[0];
}
return null;
}
export function getProviderNetworks(provider) {
const creator = getCreator(provider);
if (creator) {
return creator.networks;
}
return [];
}
export function getProvider(provider, network) {
const creator = getCreator(provider);
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try {
if (creator) {
return creator.create(network);
}
}
catch (error) {
if (!isError(error, "INVALID_ARGUMENT")) {
throw error;
}
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}
return null;
}
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export function checkProvider(provider, network) {
const creator = getCreator(provider);
return (creator != null);
}
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export function connect(network) {
const provider = getProvider("InfuraProvider", network);
if (provider == null) {
throw new Error(`could not connect to ${network}`);
}
return provider;
}
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