Finalize Transaction
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Initial Conditions
- An unfinished transaction is ready for processing.
- The transaction may or may not have have a useful (non-change) output
- The transaction is valid
- Not too big
- Inputs are sufficient to cover outputs and required fees
- A change output may exist in the transaction
- If a change output exists, it has a nil position and a nil value.
Sequence
- If the transaction only contains a change output and no inputs, then it may be discarded.
- The change amount is calculated by: Σ(txin) - ( Σ(txout) + fees )
- If the change amount is greater than zero:
- Set the value of the output
- Set the position of the output to the next unused value after the last non-change output.
- If the change amount is zero, then the change output is removed from the transaction.
- If the change amount is greater than zero:
- Calculate an ntxid for the transaction for tracking purposes.
- Loop through every (non-change) output in the transaction and update the withdrawal status object for the corresponding output.
- The withdrawal status object contain an entry for every output in the transaction, where each entry has an
transactions
object containing a nilntxid
, anindex
matching the output position index, and a matchingamount
. - Update the
ntxid
value from nil to the ntxid for the transaction.
- The withdrawal status object contain an entry for every output in the transaction, where each entry has an
- Add the fees from this transaction to the
fees
property of the withdrawal status object. - Move the transaction to the finished transaction list.