use Mix.Config config :indexer, block_rate: 5_000, json_rpc_named_arguments: [ transport: EthereumJSONRPC.HTTP, transport_options: [ http: EthereumJSONRPC.HTTP.HTTPoison, url: "https://mainnet.infura.io/8lTvJTKmHPCHazkneJsY", http_options: [recv_timeout: 60_000, timeout: 60_000, hackney: [pool: :ethereum_jsonrpc]] ], variant: EthereumJSONRPC.Geth ]