Network Configuration

Everything you need to connect your development tools, wallets, and applications to Armchain.

Armchain Devnet

Parameter	Value
Network Name	Armchain Devnet
Chain ID	55
Currency Symbol	ARM
Currency Decimals	18
RPC URL (HTTP)	https://www.armchain.org/devnet
Transaction Type	Type 3 (PQC)
Signature Algorithm	ML-DSA44

Armchain Local (Fakenet)

Parameter	Value
Network Name	Armchain Local
Chain ID	55
Currency Symbol	ARM
Currency Decimals	18
RPC URL (HTTP)	http://localhost:4000
WebSocket URL	ws://localhost:4500
Block Explorer	-

See Fakenet Setup for instructions on running a local development network.

Connecting Tools

Hardhat

⚠ Partial Compatibility: Hardhat's built-in signers use ECDSA and cannot sign Armchain transactions. Configure network connectivity as below, but use @armchain-ethersv6/ethers for all signing operations. Do not use hre.ethers.getSigners() or hre.ethers.getContractFactory().deploy() as they will fail.

// hardhat.config.js
require("@nomicfoundation/hardhat-toolbox");

module.exports = {
  solidity: {
    version: "0.8.24",
    settings: { evmVersion: "london" },
  },
  networks: {
    armchain: {
      url: "https://www.armchain.org/devnet",
      chainId: 55,
      // Do not set 'accounts' here - use @armchain-ethersv6/ethers for signing
    },
    "armchain-local": {
      url: "http://localhost:4000",
      chainId: 55,
    },
  },
};

Armchain Ethers SDK

import { JsonRpcProvider, Wallet } from "@armchain-ethersv6/ethers";

// Connect to devnet
const provider = new JsonRpcProvider("https://www.armchain.org/devnet");

// Connect to local network
const localProvider = new JsonRpcProvider("http://localhost:4000");

// Create a wallet
const wallet = new Wallet(privateKey, provider);

// Check balance
const balance = await provider.getBalance(wallet.address);
console.log("Balance:", balance.toString(), "wei");

Standard ethers.js (Read-Only)

For read-only operations (querying balances, reading contract state), standard ethers.js can connect to Armchain RPC:

import { ethers } from "ethers";

const provider = new ethers.JsonRpcProvider("https://www.armchain.org/devnet");

// Read-only operations work with standard ethers
const balance = await provider.getBalance("0x...");
const blockNumber = await provider.getBlockNumber();

Important: Signing transactions requires @armchain-ethersv6/ethers with ML-DSA44 support. Standard ethers.js cannot produce valid Armchain signatures.

curl (Direct RPC)

# Get latest block number
curl -X POST https://www.armchain.org/devnet \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

# Get balance
curl -X POST https://www.armchain.org/devnet \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xYOUR_ADDRESS","latest"],"id":1}'

# Get chain ID
curl -X POST https://www.armchain.org/devnet \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'

Default Ports

When running your own node, these are the default ports:

Port	Protocol	Description
5050	TCP/UDP	P2P (devp2p) network communication
18545	TCP	HTTP JSON-RPC
18546	TCP	WebSocket JSON-RPC

When running a Fakenet demo:

Port Pattern	Description
3000 + i	P2P port for validator i
4000 + i	HTTP RPC port for validator i
4500 + i	WebSocket port for validator i

API Namespaces

Armchain supports the following JSON-RPC API namespaces:

Namespace	Description
eth	Standard Ethereum API (transactions, blocks, state)
net	Network information
web3	Web3 utility methods
personal	Account management (lock/unlock)
txpool	Transaction pool inspection
debug	Debugging and tracing
admin	Node administration (peers, etc.)
arm	Armchain-specific methods
dag	DAG-specific queries

Gas Configuration

Parameter	Value
Minimum Gas Price	1 Gwei (1000000000 wei)
Max Block Gas	20,500,000
Default Gas Limit (transfer)	21,000
Gas Price Model	EIP-1559 (dynamic base fee + priority fee)

Next Steps

• Quickstart to deploy your first contract

• JSON-RPC Reference for full API documentation

• Node Types for GC modes, sync modes, and resource requirements