Ganache Quick Start Guide

This guide provides quick commands to get your CTAT project running with Ganache.

Quick Setup Commands

1. Install Dependencies

npm install

2. Start Ganache

# Option 1: Use the npm script
npm run ganache

# Option 2: Use ganache-cli directly
ganache-cli --deterministic --accounts 10 --host 0.0.0.0 --port 7545 --networkId 1337

3. Compile and Deploy (in a new terminal)

# Compile contracts
npx hardhat compile

# Deploy to Ganache
npm run deploy:ganache

4. Run Tests

npm run test:ganache

Default Ganache Configuration

• RPC Server: http://127.0.0.1:7545
• Network ID: 1337
• Chain ID: 1337
• Gas Limit: 6721975
• Gas Price: 20000000000 wei
• Accounts: 10 deterministic accounts
• Default Balance: 100 ETH per account

MetaMask Quick Setup

1. Add Custom Network:

   • Network Name: Ganache Local
   • RPC URL: http://127.0.0.1:7545
   • Chain ID: 1337
   • Currency: ETH

2. Import Account:

   • Copy private key from Ganache terminal output
   • MetaMask → Import Account → Paste private key

Default Test Accounts

When using --deterministic flag, Ganache generates the same accounts every time:

Account #0:

• Address: 0x627306090abaB3A6e1400e9345bC60c78a8BEf57
• Private Key: 0xc87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3

Account #1:

• Address: 0xf17f52151EbEF6C7334FAD080c5704D77216b732
• Private Key: 0xae6ae8e5ccbfb04590405997ee2d52d2b330726137b875053c36d94e974d162f

And so on...

Useful Commands

# Check if Ganache is running
curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}' http://127.0.0.1:7545

# Get network info
npx hardhat console --network ganache

# View deployed contracts
cat deployments/unknown.json

Troubleshooting

• Port already in use: Kill existing Ganache processes or use a different port
• Connection refused: Make sure Ganache is running before deployment
• Insufficient funds: Each account starts with 100 ETH, should be enough for testing
• Nonce too high/low: Reset MetaMask account or restart Ganache