# Class BSV::Network::Checkpoints::UnsupportedNetworkError <a id="class-BSV-Network-Checkpoints-UnsupportedNetworkError"></a>

**Inherits:** `BSV::Wallet::Error`

Raised when a checkpoint is requested for a network the `spv_headers` model
does not (yet) support. Phase-1 is mainnet only; testnet has no checkpoint
baked in.