Installation

This guide will help you set up the IU2U Protocol for development and integration.

Prerequisites

Before you begin, ensure you have the following installed:

• Node.js (v16 or higher)

• npm or yarn

• Git

• Hardhat (for smart contract development)

Environment Setup

1. Clone the Repository

git clone https://github.com/DINetworks/DI-U2U-Contracts.git
cd DI-U2U-Contracts

2. Install Dependencies

npm install
# or
yarn install

3. Environment Configuration

Create a .env file in the project root:

cp .env.example .env

Configure your environment variables:

# Network RPC URLs
ETHEREUM_RPC_URL=https://mainnet.infura.io/v3/YOUR_PROJECT_ID
BSC_RPC_URL=https://bsc-dataseed1.binance.org/
POLYGON_RPC_URL=https://polygon-mainnet.infura.io/v3/YOUR_PROJECT_ID
AVALANCHE_RPC_URL=https://api.avax.network/ext/bc/C/rpc
ARBITRUM_RPC_URL=https://arb1.arbitrum.io/rpc
OPTIMISM_RPC_URL=https://mainnet.optimism.io
BASE_RPC_URL=https://mainnet.base.org

# Private Keys (for deployment)
DEPLOYER_PRIVATE_KEY=your_private_key_here
RELAYER_PRIVATE_KEY=your_relayer_private_key_here

# API Keys
ETHERSCAN_API_KEY=your_etherscan_api_key
BSCSCAN_API_KEY=your_bscscan_api_key
POLYGONSCAN_API_KEY=your_polygonscan_api_key

# IU2U Configuration
CROSSFI_CHAIN_ID=4157
IU2U_TOKEN_ADDRESS=0x...

Package Installation

NPM Package

Install the IU2U SDK for frontend integration:

npm install @iu2u/sdk
# or
yarn add @iu2u/sdk

Smart Contract Dependencies

The contracts use OpenZeppelin and other standard libraries:

npm install @openzeppelin/contracts
npm install @axelar-network/axelar-gmp-sdk-solidity

Network Configuration

Supported Networks

The IU2U Protocol is deployed on the following networks:

Network	Chain ID	RPC URL
Ethereum	1	https://mainnet.infura.io/v3/YOUR_PROJECT_ID
BSC	56	https://bsc-dataseed1.binance.org/
Polygon	137	https://polygon-mainnet.infura.io/v3/YOUR_PROJECT_ID
Avalanche	43114	https://api.avax.network/ext/bc/C/rpc
Arbitrum	42161	https://arb1.arbitrum.io/rpc
Optimism	10	https://mainnet.optimism.io
Base	8453	https://mainnet.base.org

Hardhat Configuration

Update your hardhat.config.js:

require('@nomiclabs/hardhat-ethers');
require('@nomiclabs/hardhat-etherscan');
require('hardhat-gas-reporter');
require('dotenv').config();

module.exports = {
  solidity: {
    version: "0.8.24",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200
      },
      viaIR: true
    }
  },
  networks: {
    ethereum: {
      url: process.env.ETHEREUM_RPC_URL,
      accounts: [process.env.DEPLOYER_PRIVATE_KEY],
      chainId: 1
    },
    bsc: {
      url: process.env.BSC_RPC_URL,
      accounts: [process.env.DEPLOYER_PRIVATE_KEY],
      chainId: 56
    },
    polygon: {
      url: process.env.POLYGON_RPC_URL,
      accounts: [process.env.DEPLOYER_PRIVATE_KEY],
      chainId: 137
    },
    // Add other networks...
  },
  etherscan: {
    apiKey: {
      mainnet: process.env.ETHERSCAN_API_KEY,
      bsc: process.env.BSCSCAN_API_KEY,
      polygon: process.env.POLYGONSCAN_API_KEY
    }
  }
};

Verification

Test Installation

Run the test suite to verify everything is working:

npx hardhat test

Compile Contracts

Compile the smart contracts:

npx hardhat compile

Local Deployment

Deploy to local Hardhat network:

npx hardhat node
# In another terminal
npx hardhat run scripts/deploy-simple.js --network localhost

IDE Setup

VS Code Extensions

Recommended VS Code extensions:

• Solidity by Juan Blanco

• Hardhat for Visual Studio Code

• GitBook (for documentation editing)

• Prettier - Code formatter

• ESLint

VS Code Settings

Add to your settings.json:

{
  "solidity.defaultCompiler": "localNodeModule",
  "solidity.compileUsingRemoteVersion": "v0.8.24+commit.a1b79de6",
  "solidity.packageDefaultDependenciesContractsDirectory": "contracts",
  "solidity.packageDefaultDependenciesDirectory": "node_modules"
}

Next Steps

Now that you have IU2U installed, you can:

1. Follow the Quick Start Guide for basic usage

2. Learn Core Concepts to understand the protocol

3. Explore Examples for integration patterns

Troubleshooting

Common Issues

Node.js Version

# Check Node.js version
node --version
# Should be v16 or higher

Dependencies

# Clear node_modules and reinstall
rm -rf node_modules package-lock.json
npm install

Hardhat Compilation

# Clear Hardhat cache
npx hardhat clean
npx hardhat compile

Getting Help

If you encounter issues:

1. Check the Troubleshooting Guide

2. Search existing GitHub Issues

3. Join our Discord community

4. Create a new issue with detailed information