ethers.js/packages/providers/lib/provider-alchemy.js
2022-04-11 17:14:19 -04:00

69 lines
2.4 KiB
JavaScript

import { defineProperties } from "@ethersproject/properties";
import { FetchRequest } from "@ethersproject/web";
import { showThrottleMessage } from "./community.js";
import { logger } from "./logger.js";
import { Network } from "./network.js";
import { StaticJsonRpcProvider } from "./provider-jsonrpc.js";
const defaultApiKey = "_gg7wSSi0KMBsdKnGVfHDueq6xMB9EkC";
function getHost(name) {
switch (name) {
case "homestead":
return "eth-mainnet.alchemyapi.io";
case "ropsten":
return "eth-ropsten.alchemyapi.io";
case "rinkeby":
return "eth-rinkeby.alchemyapi.io";
case "goerli":
return "eth-goerli.alchemyapi.io";
case "kovan":
return "eth-kovan.alchemyapi.io";
case "matic":
return "polygon-mainnet.g.alchemy.com";
case "maticmum":
return "polygon-mumbai.g.alchemy.com";
case "arbitrum":
return "arb-mainnet.g.alchemy.com";
case "arbitrum-rinkeby":
return "arb-rinkeby.g.alchemy.com";
case "optimism":
return "opt-mainnet.g.alchemy.com";
case "optimism-kovan":
return "opt-kovan.g.alchemy.com";
}
return logger.throwArgumentError("unsupported network", "network", name);
}
export class AlchemyProvider extends StaticJsonRpcProvider {
constructor(_network = "homestead", apiKey) {
const network = Network.from(_network);
if (apiKey == null) {
apiKey = defaultApiKey;
}
super(AlchemyProvider.getConnection(network, apiKey), network);
defineProperties(this, { apiKey });
}
_getProvider(chainId) {
try {
return new AlchemyProvider(chainId, this.apiKey);
}
catch (error) { }
return super._getProvider(chainId);
}
isCommunityResource() {
return (this.apiKey === defaultApiKey);
}
static getConnection(network, apiKey) {
if (apiKey == null) {
apiKey = defaultApiKey;
}
const request = new FetchRequest(`https:/\/${getHost(network.name)}/v2/${apiKey}`);
request.allowGzip = true;
const throttleRetry = async (request, response, attempt) => {
if (apiKey === defaultApiKey) {
showThrottleMessage("alchemy");
}
return true;
};
return { request, throttleRetry };
}
}
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