Constant zebra_consensus::transaction::UTXO_LOOKUP_TIMEOUT

const UTXO_LOOKUP_TIMEOUT: Duration;

A timeout applied to UTXO lookup requests.

The exact value is non-essential, but this should be long enough to allow out-of-order verification of blocks (UTXOs are not required to be ready immediately) while being short enough to:

• prune blocks that are too far in the future to be worth keeping in the queue,
• fail blocks that reference invalid UTXOs, and
• fail blocks that reference UTXOs from blocks that have temporarily failed to download, because a peer sent Zebra a bad list of block hashes. (The UTXO verification failure will restart the sync, and re-download the chain in the correct order.)