midnight-deploy

Midnight Deploy

Deploy Midnight smart contracts to local development environment or preview network (testnet).

When to Use

Use this skill when:

• Deploying a new Compact contract
• Starting local Midnight infrastructure
• Connecting to preview network (testnet)
• Troubleshooting deployment issues
• Setting up development environment

How It Works

1. Compiles Compact contract to WebAssembly + ZK circuits
2. Starts required infrastructure (node, indexer, proof server)
3. Deploys contract with initial state
4. Returns contract address for frontend integration

Prerequisites

Before deploying, ensure you have:

# Check Compact compiler
compact check

# Check Node.js
node -v  # v23+

# Check Docker (for local infrastructure)
docker -v

Local Development (Standalone)

Start Local Infrastructure

# From project root
npm run setup-standalone

This starts:

• Midnight Node: ws://127.0.0.1:9944
• Indexer: http://127.0.0.1:8088
• Proof Server: http://127.0.0.1:6300

Deploy to Local

# Build contract first
cd counter-contract
npm run build

# Deploy via CLI
cd ../counter-cli
npm run deploy:local

Preview Network (Testnet)

Configure Environment

Create counter-cli/.env:

MY_PREVIEW_MNEMONIC="your twelve word mnemonic phrase here"
MY_UNDEPLOYED_UNSHIELDED_ADDRESS=""

Get Test Tokens

1. Visit Midnight Faucet
2. Enter your wallet address
3. Receive tSTAR tokens

Deploy to Preview

# Build contract
cd counter-contract
npm run build

# Deploy to testnet
cd ../counter-cli
npm run deploy:preview

Deployment Output

Successful deployment returns:

{
  "contractAddress": "0x1234567890abcdef...",
  "deploymentTxHash": "0xabcdef1234567890...",
  "network": "preview",
  "timestamp": "2024-01-15T10:30:00Z"
}

Configure Frontend

After deployment, update frontend environment:

# frontend-vite-react/.env
VITE_CONTRACT_ADDRESS="0x1234567890abcdef..."