Merge bitcoin/bitcoin#24198: wallet, rpc: add wtxid in WalletTxToJSON

7abd8b21ba doc: include wtxid in TransactionDescriptionString (brunoerg)
2d596bce6f doc: add wtxid info in release-notes (brunoerg)
a5b66738f1 test: add wtxid in expected_fields for wallet_basic (brunoerg)
e8c659a297 wallet: add wtxid in WalletTxToJSON (brunoerg)
7482b6f895 wallet: add GetWitnessHash() (brunoerg)

Pull request description:

  This PR add `wtxid` in `WalletTxToJSON` which allows to return this field in `listsinceblock`, `listtransactions` and `gettransaction` (RPCs).

ACKs for top commit:
  achow101:
    re-ACK 7abd8b21ba
  w0xlt:
    crACK 7abd8b2
  luke-jr:
    re-utACK 7abd8b21ba

Tree-SHA512: f86f2dbb5e38e7b19932006121802f47b759d31bdbffe3263d1db464f6a3a30fddd68416f886a44f6d3a9fd570f7bd4f8d999737ad95c189e7ae5e8ec1ffbdaa

doc/release-notes-24198.md

@@ -0,0 +1,6 @@
+Updated RPCs
+------------
+
+- The `listtransactions`, `gettransaction`, and `listsinceblock`
+  RPC methods now include a wtxid field (hash of serialized transaction,
+  including witness data) for each transaction.

src/wallet/rpc/transactions.cpp

@@ -34,6 +34,7 @@ static void WalletTxToJSON(const CWallet& wallet, const CWalletTx& wtx, UniValue
     }
     uint256 hash = wtx.GetHash();
     entry.pushKV("txid", hash.GetHex());
+    entry.pushKV("wtxid", wtx.GetWitnessHash().GetHex());
     UniValue conflicts(UniValue::VARR);
     for (const uint256& conflict : wallet.GetTxConflicts(wtx))
         conflicts.push_back(conflict.GetHex());
@@ -431,6 +432,7 @@ static const std::vector<RPCResult> TransactionDescriptionString()
            {RPCResult::Type::NUM, "blockindex", /*optional=*/true, "The index of the transaction in the block that includes it."},
            {RPCResult::Type::NUM_TIME, "blocktime", /*optional=*/true, "The block time expressed in " + UNIX_EPOCH_TIME + "."},
            {RPCResult::Type::STR_HEX, "txid", "The transaction id."},
+           {RPCResult::Type::STR_HEX, "wtxid", "The hash of serialized transaction, including witness data."},
            {RPCResult::Type::ARR, "walletconflicts", "Conflicting transaction ids.",
            {
                {RPCResult::Type::STR_HEX, "txid", "The transaction id."},

src/wallet/transaction.h

@@ -296,6 +296,7 @@ public:
     bool isUnconfirmed() const { return !isAbandoned() && !isConflicted() && !isConfirmed(); }
     bool isConfirmed() const { return state<TxStateConfirmed>(); }
     const uint256& GetHash() const { return tx->GetHash(); }
+    const uint256& GetWitnessHash() const { return tx->GetWitnessHash(); }
     bool IsCoinBase() const { return tx->IsCoinBase(); }
 
     // Disable copying of CWalletTx objects to prevent bugs where instances get

test/functional/wallet_basic.py

@@ -668,7 +668,7 @@ class WalletTest(BitcoinTestFramework):
                                  "category": baz["category"],
                                  "vout":     baz["vout"]}
         expected_fields = frozenset({'amount', 'bip125-replaceable', 'confirmations', 'details', 'fee',
-                                     'hex', 'time', 'timereceived', 'trusted', 'txid', 'walletconflicts'})
+                                     'hex', 'time', 'timereceived', 'trusted', 'txid', 'wtxid', 'walletconflicts'})
         verbose_field = "decoded"
         expected_verbose_fields = expected_fields | {verbose_field}