# thirdweb (required for x402)
# Get secret key: https://thirdweb.com → Dashboard → Settings → API Keys
THIRDWEB_SECRET_KEY=your-thirdweb-secret-key

# Server wallet that receives payments (must be a valid address)
SERVER_WALLET_ADDRESS=0x0000000000000000000000000000000000000000

# Optional: use ALL Mainnet (Alltra, 651940) for payments — Alltra-native x402 + USDC (recommended for production)
X402_USE_ALLTRA=false

# Optional: use Chain 138 for payments (default: false = use Arbitrum Sepolia + USDC for testing)
# Set to true only after a Chain 138 token supports ERC-2612/ERC-3009. See docs/04-configuration/CHAIN138_X402_TOKEN_SUPPORT.md
X402_USE_CHAIN_138=false

# Optional: Chain 138 RPC when X402_USE_CHAIN_138=true
RPC_URL_138=https://rpc-http-pub.d-bis.org

# Optional: Chain 651940 (Alltra) RPC when X402_USE_ALLTRA=true
CHAIN_651940_RPC_URL=https://mainnet-rpc.alltra.global

# Optional: server port (default 4020)
PORT=4020