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

56 lines
2.0 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 = "9f7d929b018cdffb338517efa06f58359e86ff1ffd350bc889738523659e7972";
function getHost(name) {
switch (name) {
case "homestead":
return "rpc.ankr.com/eth";
case "matic":
return "rpc.ankr.com/polygon";
case "arbitrum":
return "rpc.ankr.com/arbitrum";
}
return logger.throwArgumentError("unsupported network", "network", name);
}
export class AnkrProvider extends StaticJsonRpcProvider {
constructor(_network = "homestead", apiKey) {
const network = Network.from(_network);
if (apiKey == null) {
apiKey = defaultApiKey;
}
const connection = AnkrProvider.getConnection(network, apiKey);
super(connection, network);
defineProperties(this, { apiKey });
// Ankr does not support filterId, so we force polling
super._setOptions({ polling: true });
}
_getProvider(chainId) {
try {
return new AnkrProvider(chainId, this.apiKey);
}
catch (error) { }
return super._getProvider(chainId);
}
static getConnection(network, apiKey) {
if (apiKey == null) {
apiKey = defaultApiKey;
}
const request = new FetchRequest(`https:/\/${getHost(network.name)}/${apiKey}`);
request.allowGzip = true;
const throttleRetry = async (request, response, attempt) => {
if (apiKey === defaultApiKey) {
showThrottleMessage("AnkrProvider");
}
return true;
};
return { request, throttleRetry };
}
isCommunityResource() {
return (this.apiKey === defaultApiKey);
}
}
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