import { RpcCore } from "https://deno.land/x/polkadot@0.2.38/rpc-core/bundle.ts";
Parameters
userRpc: Record<string, Record<string, DefinitionRpc | DefinitionRpcSub>>
x/polkadot/rpc-core/bundle.ts>RpcCore#addUserInterfaces
import { RpcCore } from "https://deno.land/x/polkadot@0.2.38/rpc-core/bundle.ts";