Module zebra_chain::transaction::unmined

Unmined Zcash transaction identifiers and transactions.

Transaction version 5 is uniquely identified by WtxId when unmined, and Hash in the blockchain. The effects of a v5 transaction (spends and outputs) are uniquely identified by the same Hash in both cases.

Transaction versions 1-4 are uniquely identified by legacy Hash transaction IDs, whether they have been mined or not. So Zebra, and the Zcash network protocol, don’t use witnessed transaction IDs for them.

Zebra’s UnminedTxId and UnminedTx enums provide the correct unique ID for unmined transactions. They can be used to handle transactions regardless of version, and get the WtxId or Hash when required.

Modules

• zip317
  An implementation of the [ZIP-317] fee calculations for UnminedTxs:

Structs

• UnminedTx
  An unmined transaction, and its pre-calculated unique identifying ID.
• VerifiedUnminedTx
  A verified unmined transaction, and the corresponding transaction fee.

Enums

• UnminedTxId
  A unique identifier for an unmined transaction, regardless of version.

Constants

• MEMPOOL_TRANSACTION_COST_THRESHOLD
  The minimum cost value for a transaction in the mempool.
• MEMPOOL_TRANSACTION_LOW_FEE_PENALTY 🔒
  When a transaction pays a fee less than the conventional fee, this low fee penalty is added to its cost for mempool eviction.