57fb37c275 wallet: CommitTransaction, remove extra wtx lookup and add exception for a possible db write error. (furszy)
Pull request description:
Two points for `CWallet::CommitTransaction`:
1) The extra wtx lookup:
As we are calling to `AddToWallet` first, which returns the recently added/updated wtx pointer, there is no need to look up the wtx again few lines later. We can just use it.
2) The db write error:
`AddToWallet` can only return a nullptr if the db write fails, which inside `CommitTransaction` translates to an exception throw cause. We expect everywhere that `CommitTransaction` always succeed.
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Extra note:
This finding generated another working path for me :)
It starts with the following question: why are we returning a nullptr from `AddToWallet` if the db write failed without removing the recently added transaction from the wallet's map?..
Can led to a wallet invalid state where the inputs of this new transaction are not marked dirty, while the transaction that spends them still exist on the in-memory wallet tx map.
-- I'm writing it here to gather some feedback first and not forget it, will create a follow-up PR in the coming days 🚜 --
ACKs for top commit:
achow101:
ACK 57fb37c275
jonatack:
ACK 57fb37c
ryanofsky:
Code review ACK 57fb37c275. Seems like a clear improvement. Better to fail earlier with a better error message if the failure is going to happen anyway
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79cabe3a5b