Merge #15632: Remove ResendWalletTransactions from the Validation Interface

833d98ae0 [wallet] Remove unnecessary Chain::Lock parameter from ResendWalletTransactions (John Newbery)
52b760fc6 [wallet] Schedule tx rebroadcasts in wallet (John Newbery)
f463cd107 [wallet] Keep track of the best block time in the wallet (John Newbery)

Pull request description:

  Remove the `Broadcast()`/`ResendWalletTransactions()` notification from the Validation interface.

  Closes #15619. See that issue for discussion.

ACKs for commit 833d98:
  ryanofsky:
    utACK 833d98ae07. No changes, just rebase.

Tree-SHA512: 7689f2083608ebad8c95ab6692f7842754e1ebe5508bc926a89cad7105cce41007648f37341ba5feb92b30a7aa87acd3abf264a4f1874e35a7161553f6ff3595

test/functional/wallet_resendwallettransactions.py

@@ -39,6 +39,12 @@ class ResendWalletTransactionsTest(BitcoinTestFramework):
         self.log.info("Create a new transaction and wait until it's broadcast")
         txid = int(node.sendtoaddress(node.getnewaddress(), 1), 16)
 
+        # Wallet rebroadcast is first scheduled 1 sec after startup (see
+        # nNextResend in ResendWalletTransactions()). Sleep for just over a
+        # second to be certain that it has been called before the first
+        # setmocktime call below.
+        time.sleep(1.1)
+
         # Can take a few seconds due to transaction trickling
         wait_until(lambda: node.p2p.tx_invs_received[txid] >= 1, lock=mininode_lock)