PRIVATE_KEY=0x...
ADDRESS=0x...

ELSA_API_URL=https://x402-api.heyelsa.ai
RPC_URL=https://mainnet.base.org
CHAIN_ID=8453

USDC_ADDRESS=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
WETH_ADDRESS=0x4200000000000000000000000000000000000006