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a5986e82ddrefactor: Remove CAddressBookData::destdata (Ryan Ofsky)5938ad0bdbwallet: Add DatabaseBatch::ErasePrefix method (Ryan Ofsky) Pull request description: This is cleanup that doesn't change external behavior. Benefits of the cleanup are: - Removes awkward `StringMap` intermediate representation for wallet address metadata. - Simplifies `CWallet`, deals with used address and received request serialization in `walletdb.cpp` instead of higher level wallet code - Adds test coverage and documentation This PR doesn't change externally observable behavior. Internally, the only change in behavior is that `EraseDestData` deletes rows directly from the database because they are no longer stored in memory. This is more direct and efficient because it uses a single lookup and scan instead of multiple lookups. Motivation for this cleanup is making changes like #18550, #18192, #13756 easier to reason about and less likely to result in unintended behavior and bugs --- This PR is a rebased copy of #18608. For some reason that PR is locked and couldn't be reopened or commented on. This PR is an alternative to #27215 with differences described in https://github.com/bitcoin/bitcoin/pull/27215#pullrequestreview-1329028143 ACKs for top commit: achow101: ACKa5986e82ddfurszy: Code ACKa5986e82Tree-SHA512: 6bd3e402f1f60263fbd433760bdc29d04175ddaf8307207c4a67d59f6cffa732e176ba57886e02926f7a1615dce0ed9cda36c8cbc6430aa8e5b56934c23f3fe7