reqresp

Lodestar Eth Consensus Req/Resp Protocol

This package is part of ChainSafe's Lodestar project

Typescript implementation of the Ethereum Consensus Req/Resp protocol

Usage

import {Libp2p} from "libp2p";
import {ssz} from "@lodestar/types";
import {ReqResp, ContextBytesType, Protocol, Encoding} from "@lodestar/reqresp";
import {ForkName} from "@lodestar/params";
import {Logger} from "@lodestar/utils";

async function getReqResp(libp2p: Libp2p, logger: Logger): Promise<void> {
  const reqResp = new ReqResp({libp2p, logger, metricsRegister: null});

  // Register a PONG handler to respond with caller's Ping request
  const pingProtocol: Protocol = {
    method: "ping",
    version: 1,
    encoding: Encoding.SSZ_SNAPPY,
    contextBytes: {type: ContextBytesType.Empty},
    requestSizes: ssz.phase0.Ping,
    responseSizes: () => ssz.phase0.Ping,
    handler: async function* (req) {
      yield {
        data: req.data,
        fork: ForkName.phase0,
      };
    },
  };

  reqResp.registerProtocol(pingProtocol);
}

Prerequisites

• NodeJS (LTS)
• Yarn

What you need

You will need to go over the specification.

Getting started

• Follow the installation guide to install Lodestar.
• Quickly try out the whole stack by starting a local testnet.

Contributors

Read our contributors document, submit an issue or talk to us on our discord!

License

Apache-2.0 ChainSafe Systems