VinuChain Testnet

VinuChain testnet (chain ID 206) is the parallel public test network. It runs the full ELEMONT binary plus additional experimental stages (the SfcV2Patch-SfcV2Patch10 SFC re-flashes and PaybackV2Patch) that are not staged on mainnet — mainnet installed the same Cycle-165 SFC bytecode directly at its first SfcV2 seal, so those re-flash flags never apply there. VinuBLS12381, VinuLatestEVM and PaybackV2 are no longer testnet-only: all three went live on mainnet in the 2026-08-29 ELEMONT upgrade. Use it to test contracts and integrations against the latest chain features before they reach mainnet. This section covers connecting to testnet, running a private fakenet, and the operator-facing chain upgrade guide.

For all chain IDs, RPC endpoints, and explorer URLs in one place, see Network Details.