Build. Break. Build again.
Testnet is the open developer sandbox. It uses test-only SIGIL with no economic claim. Hit the faucet, deploy contracts, run T1 jobs, register validators, and exercise the same client and RPC surfaces before touching canary or mainnet.
sigil · liverunning
Free test SIGIL. No mainnet value.
Use the testnet endpoint and faucet for wallets, integration tests, validators, and contract rehearsals.