Docker - Nexus

Introduction

It’s possible to run Nexus in a Docker container, without needing to write a single line of code. This is possible thanks to the Nexus environment variables that allow you to configure the Nexus instance.

Setup

version: "3.8"

services:
  nexus:
    image: "whatsgood/nexus:latest"
    container_name: nexus
    ports:
      - "4000:4000"
    environment:
      - 'NEXUS_NODE_PROVIDERS=[{"name": "eth.public", "url":"https://eth.public-rpc.com", "chainId": 1}]'
      - 'NEXUS_CHAINS=[{"name": "mainnet", "chainId": 1, "blockTime": 15}]'
      - 'NEXUS_RELAY_FAILURE=["cycle-requests", 5]'
      - "NEXUS_RELAY_ORDER=random"
      - "NEXUS_LOG_LEVEL=debug"

Usage

curl -X POST http://localhost:4000/1 \
     -H "Content-Type: application/json" \
     -d '{
           "jsonrpc": "2.0", 
           "method": "eth_blockNumber", 
           "params": [], 
           "id": 1
         }'