This folder contains the HelloERC20 example contract for testing ViaLabs cross-chain messaging on testnets.

1. Node.js v18+
2. Testnet native tokens:
   • Avalanche Fuji: Get AVAX from Avalanche Faucet
   • Base Sepolia: Get ETH from Base Faucet

# Install dependencies
npm install

# Set up your private key
cp .env.example .env
# Edit .env with your private key

# Deploy to Avalanche Fuji
npx hardhat run scripts/deploy.ts --network fuji

# Deploy to Base Sepolia  
npx hardhat run scripts/deploy.ts --network baseSepolia

# Configure cross-chain (run after deploying to both chains)
npx hardhat run scripts/configure.ts --network fuji
npx hardhat run scripts/configure.ts --network baseSepolia

The HelloERC20 contract is a simple cross-chain token that:

1. Mints 1,000,000 tokens to the deployer on first deployment
2. Implements bridge(destChainId, recipient, amount) to burn tokens and send cross-chain message
3. Implements _processMessage() to receive messages and mint tokens on destination

After deployment and configuration, update the token addresses in your AgentKit demo:

// In agentkit-demo, ask the agent:
"Bridge 100 HELLO tokens to Base Sepolia (chain 84532) to address 0x..."

• Testnets: Most fees are sponsored by ViaLabs
• Source fee: Paid in USDC/USDT (FEE_TOKEN)
• Destination gas: Paid in wrapped native tokens (WAVAX, WETH)

For testnets, ensure your contract has small amounts of testnet USDC and wrapped native tokens.