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Merge #25768: wallet: Properly rebroadcast unconfirmed transaction ch…
…ains 3405f3e test: Test that an unconfirmed not-in-mempool chain is rebroadcast (Andrew Chow) 10d91c5 wallet: Deduplicate Resend and ReacceptWalletTransactions (Andrew Chow) Pull request description: Currently `ResendWalletTransactions` (used for normal rebroadcasts) will attempt to rebroadcast all of the transactions in the wallet in the order they are stored in `mapWallet`. This ends up being random as `mapWallet` is a `std::unordered_map`. However `ReacceptWalletTransactions` (used for adding to the mempool on loading) first sorts the txs by wallet insertion order, then submits them. The result is that `ResendWalletTranactions` will fail to rebroadcast child transactions if their txids happen to be lexicographically less than their parent's txid. This PR resolves this issue by combining `ReacceptWalletTransactions` and `ResendWalletTransactions` into a new `ResubmitWalletTransactions` so that the iteration code and basic checks are shared. A test has also been added that checks that such transaction chains are rebroadcast correctly. ACKs for top commit: naumenkogs: utACK 3405f3e 1440000bytes: reACK 3405f3e furszy: Late code review ACK 3405f3e stickies-v: ACK 3405f3e Tree-SHA512: 1240d9690ecc2ae8d476286b79e2386f537a90c41dd2b8b8a5a9c2a917aa3af85d6aee019fbbb05e772985a2b197e2788305586d9d5dac78ccba1ee5aa31d77a
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