Module check

Transaction checks.

Code in this file can freely assume that no pre-V4 transactions are present.

Functions

• check_for_duplicates 🔒
  Check for duplicate items in a collection.
• coinbase_expiry_height
  Returns Ok(()) if the expiry height for the coinbase transaction is valid according to specifications 7.1 and ZIP-203.
• coinbase_outputs_are_decryptable
  Checks compatibility with ZIP-212 shielded Sapling and Orchard coinbase output decryption
• coinbase_tx_no_prevout_joinsplit_spend
  Check that a coinbase transaction has no PrevOut inputs, JoinSplits, or spends.
• consensus_branch_id
  Checks the nConsensusBranchId field.
• disabled_add_to_sprout_pool
  Check if a transaction is adding to the sprout pool after Canopy network upgrade given a block height and a network.
• has_enough_orchard_flags
  Checks that the transaction has enough orchard flags.
• has_inputs_and_outputs
  Checks that the transaction has inputs and outputs.
• joinsplit_has_vpub_zero
  Check if JoinSplits in the transaction have one of its v_{pub} values equal to zero.
• lock_time_has_passed
  Checks if the transaction’s lock time allows this transaction to be included in a block.
• non_coinbase_expiry_height
  Returns Ok(()) if the expiry height for a non coinbase transaction is valid according to specifications 7.1 and ZIP-203.
• spend_conflicts
  Check if a transaction has any internal spend conflicts.
• tx_transparent_coinbase_spends_maturity
  Accepts a transaction, block height, block UTXOs, and the transaction’s spent UTXOs from the chain.
• validate_expiry_height_max 🔒
  Checks that the expiry height of a transaction does not exceed the maximal value.
• validate_expiry_height_mined 🔒
  Checks that a transaction does not exceed its expiry height.