ethers.js/lib.esm/providers/provider-alchemy.js
2023-03-07 02:11:03 -05:00

116 lines
4.0 KiB
JavaScript

/**
* About Alchemy
*
* @_subsection: api/providers/thirdparty:Alchemy [providers-alchemy]
*/
import { defineProperties, resolveProperties, assert, assertArgument, FetchRequest } from "../utils/index.js";
import { showThrottleMessage } from "./community.js";
import { Network } from "./network.js";
import { JsonRpcProvider } from "./provider-jsonrpc.js";
const defaultApiKey = "_gg7wSSi0KMBsdKnGVfHDueq6xMB9EkC";
function getHost(name) {
switch (name) {
case "mainnet":
return "eth-mainnet.alchemyapi.io";
case "goerli":
return "eth-goerli.g.alchemy.com";
case "sepolia":
return "eth-sepolia.g.alchemy.com";
case "arbitrum":
return "arb-mainnet.g.alchemy.com";
case "arbitrum-goerli":
return "arb-goerli.g.alchemy.com";
case "matic":
return "polygon-mainnet.g.alchemy.com";
case "matic-mumbai":
return "polygon-mumbai.g.alchemy.com";
case "optimism":
return "opt-mainnet.g.alchemy.com";
case "optimism-goerli":
return "opt-goerli.g.alchemy.com";
}
assertArgument(false, "unsupported network", "network", name);
}
/**
* The **AlchemyProvider** connects to the [[link-alchemy]]
* JSON-RPC end-points.
*
* By default, a highly-throttled API key is used, which is
* appropriate for quick prototypes and simple scripts. To
* gain access to an increased rate-limit, it is highly
* recommended to [sign up here](link-alchemy-signup).
*
* @_docloc: api/providers/thirdparty
*/
export class AlchemyProvider extends JsonRpcProvider {
apiKey;
constructor(_network, apiKey) {
if (_network == null) {
_network = "mainnet";
}
const network = Network.from(_network);
if (apiKey == null) {
apiKey = defaultApiKey;
}
const request = AlchemyProvider.getRequest(network, apiKey);
super(request, network, { staticNetwork: network });
defineProperties(this, { apiKey });
}
_getProvider(chainId) {
try {
return new AlchemyProvider(chainId, this.apiKey);
}
catch (error) { }
return super._getProvider(chainId);
}
async _perform(req) {
// https://docs.alchemy.com/reference/trace-transaction
if (req.method === "getTransactionResult") {
const { trace, tx } = await resolveProperties({
trace: this.send("trace_transaction", [req.hash]),
tx: this.getTransaction(req.hash)
});
if (trace == null || tx == null) {
return null;
}
let data;
let error = false;
try {
data = trace[0].result.output;
error = (trace[0].error === "Reverted");
}
catch (error) { }
if (data) {
assert(!error, "an error occurred during transaction executions", "CALL_EXCEPTION", {
action: "getTransactionResult",
data,
reason: null,
transaction: tx,
invocation: null,
revert: null // @TODO
});
return data;
}
assert(false, "could not parse trace result", "BAD_DATA", { value: trace });
}
return await super._perform(req);
}
isCommunityResource() {
return (this.apiKey === defaultApiKey);
}
static getRequest(network, apiKey) {
if (apiKey == null) {
apiKey = defaultApiKey;
}
const request = new FetchRequest(`https:/\/${getHost(network.name)}/v2/${apiKey}`);
request.allowGzip = true;
if (apiKey === defaultApiKey) {
request.retryFunc = async (request, response, attempt) => {
showThrottleMessage("alchemy");
return true;
};
}
return request;
}
}
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