Build on JWW Network — Developer Hub

Quick Start

Get your first JWW DApp running in under 5 minutes. JWW Network is fully EVM-compatible — if you know Ethereum, you already know JWW.

1. Install JWW CLI

# Install via npm (Node.js 18+ required)
npm install -g @jww/cli

# Verify installation
jww --version
# → jww/2.4.1 darwin-arm64 node-v20.11.0

2. Create a new project

# Scaffold a new DApp project
jww init my-dapp --template erc20
cd my-dapp

# Project structure:
# ├── contracts/     → Solidity smart contracts
# ├── scripts/       → Deployment scripts
# ├── test/          → Contract tests
# └── jww.config.js  → Network config

# Connect to JWW testnet
jww network use testnet

3. Write your first contract

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract MyToken {
    string public  name     = "My Token";
    string public  symbol   = "MTK";
    uint8  public  decimals = 18;
    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;
    event Transfer(address indexed from, address indexed to, uint256 value);

    constructor(uint256 _supply) {
        totalSupply         = _supply * 10 ** decimals;
        balanceOf[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    function transfer(address to, uint256 amount)
        external returns (bool)
    {
        balanceOf[msg.sender] -= amount;
        balanceOf[to]         += amount;
        emit Transfer(msg.sender, to, amount);
        return true;
    }
}

4. Deploy to Testnet

# Compile
jww compile

# Deploy to testnet
jww deploy --network testnet --constructor-args 1000000

# Output:
# ✓ Compiling MyToken.sol...
# ✓ Deploying to JWW Testnet...
# ✓ Contract address: 0x1a2b3c4d...ef01
# ✓ Gas used: 248,592 | Fee: 0.00024 JWWT
# ✓ View on explorer: scan.jww.network/tx/0x...

Core Concepts

JWW Architecture

JWW Network is built on a Delegated Proof-of-Stake (DPoS) consensus with full EVM compatibility. Transactions are processed by 27 elected Super Representatives with 3-second finality.

Gas & Fees

JWW uses an energy model instead of ETH-style gas. Stake JWWT to get free energy for transactions. Unstaked users pay ~$0.001 per transaction.

// Estimate transaction cost
const jww = new JWWWeb3('https://rpc.jww.network');

const estimate = await jww.eth.estimateGas({
  from:  '0xYourAddress',
  to:    '0xContractAddress',
  data:  contract.methods.transfer(to, amount).encodeABI()
});
console.log(`Estimated: ${estimate} energy (~$${(estimate * 0.000000042).toFixed(6)})`);

Token Standards

JWW supports three token standards, all fully EVM-compatible:

Standard	Type	Use Case	Compatible
`JRC-20`	Fungible	Currencies, governance tokens, utility tokens	ERC-20 ✓
`JRC-721`	Non-Fungible	Unique digital assets, art, game items	ERC-721 ✓
`JRC-1155`	Multi-Token	Game assets, editions, batch transfers	ERC-1155 ✓