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path: root/src/wallet/transaction.cpp
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2021-11-15refactor: Make CWalletTx sync state type-safeRussell Yanofsky
Current CWalletTx state representation makes it possible to set inconsistent states that won't be handled correctly by wallet sync code or serialized & deserialized back into the same form. For example, it is possible to call setConflicted without setting a conflicting block hash, or setConfirmed with no transaction index. And it's possible update individual m_confirm and fInMempool data fields without setting an overall consistent state that can be serialized and handled correctly. Fix this without changing behavior by using std::variant, instead of an enum and collection of fields, to represent sync state, so state tracking code is safer and more legible. This is a first step to fixing state tracking bugs https://github.com/bitcoin-core/bitcoin-devwiki/wiki/Wallet-Transaction-Conflict-Tracking, by adding an extra margin of safety that can prevent new bugs from being introduced as existing bugs are fixed.
2021-05-26MOVEONLY: CWallet transaction code out of wallet.cpp/.hRussell Yanofsky
This commit just moves functions without making any changes. It can be reviewed with `git log -p -n1 --color-moved=dimmed_zebra` Motivation for this change is to make wallet.cpp/h less monolithic and start to make wallet transaction state tracking comprehensible so bugs in https://github.com/bitcoin-core/bitcoin-devwiki/wiki/Wallet-Transaction-Conflict-Tracking can be fixed safely without introducing new problems. This commit moves wallet classes and methods that deal with transactions out of wallet.cpp/.h into better organized files: - transaction.cpp/.h - CWalletTx and CMerkleTx class definitions - receive.cpp/.h - functions checking received transactions and computing balances - spend.cpp/.h - functions creating transactions and finding spendable coins After #20773, when loading is separated from syncing it will also be possible to move more wallet.cpp/.h functions to: - sync.cpp/.h - functions handling chain notifications and rescanning This commit arranges receive.cpp and spend.cpp functions in dependency order so it's possible to skim receive.cpp and get an idea of how computing balances works, and skim spend.cpp and get an idea of how transactions are created, without having to jump all over wallet.cpp where functions are not in order and there is a lot of unrelated code. Followup commit "refactor: Detach wallet transaction methods" in https://github.com/bitcoin/bitcoin/pull/21206 follows up this PR and tweaks function names and arguments to reflect new locations. The two commits are split into separate PRs because this commit is more work to maintain and less work to review, while the other commit is less work to maintain and more work to review, so hopefully this commit can be merged earlier.