/
providersRPC.ts
42 lines (35 loc) · 1.15 KB
/
providersRPC.ts
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import { CHAINS } from '@lido-sdk/constants';
import {
JsonRpcProvider,
JsonRpcBatchProvider,
StaticJsonRpcProvider,
} from '@ethersproject/providers';
import { StaticJsonRpcBatchProvider } from './staticJsonRpcBatchProvider';
const createProviderGetter = <P extends typeof JsonRpcProvider>(
Provider: P,
) => {
const cache = new Map<string, InstanceType<P>>();
return (
chainId: CHAINS,
url: string,
cacheSeed = 0,
pollingInterval: number | null = null,
): InstanceType<P> => {
const cacheKey = `${chainId}-${cacheSeed}-${url}`;
let provider = cache.get(cacheKey);
if (!provider) {
provider = new Provider(url, chainId) as InstanceType<P>;
cache.set(cacheKey, provider);
}
if (pollingInterval) {
provider.pollingInterval = pollingInterval;
}
return provider;
};
};
export const getRpcProvider = createProviderGetter(JsonRpcProvider);
export const getRpcBatchProvider = createProviderGetter(JsonRpcBatchProvider);
export const getStaticRpcProvider = createProviderGetter(StaticJsonRpcProvider);
export const getStaticRpcBatchProvider = createProviderGetter(
StaticJsonRpcBatchProvider,
);