Merge bitcoin/bitcoin#23139: rpc: fix "trusted" field in TransactionDescriptionString(), add coverage

66f6efc rpc: improve TransactionDescriptionString() "generated" help (Jon Atack)
296cfa3 test: add listtransactions/listsinceblock "trusted" coverage (Jon Atack)
d95913f rpc: fix "trusted" description in TransactionDescriptionString (Jon Atack)

Pull request description:

  The RPC gettransaction, listtransactions, and listsinceblock helps returned by `TransactionDescriptionString()` inform the user that the `trusted` boolean field is only present if the transaction is trusted and safe to spend from.

  The field is in fact returned by `WalletTxToJSON()` when the transaction has 0 confirmations (or negative confirmations, if conflicted), and it can be true or false.

  This patch fixes the help, adds test coverage, and touches up the help for the neighboring `generate` field.

ACKs for top commit:
  rajarshimaitra:
    tACK bitcoin/bitcoin@66f6efc
  theStack:
    Tested ACK 66f6efc

Tree-SHA512: 4c2127765b82780e07bbdbf519d27163d414d9f15598e01e02210f210e6009be344c84951d7274e747b1386991d4c3b082cd25aebe885fb8cf0b92d57178f68e

Author: laanwj

src/wallet/rpcwallet.cpp

@@ -1389,8 +1389,9 @@ static const std::vector<RPCResult> TransactionDescriptionString()
 {
     return{{RPCResult::Type::NUM, "confirmations", "The number of confirmations for the transaction. Negative confirmations means the\n"
                "transaction conflicted that many blocks ago."},
-           {RPCResult::Type::BOOL, "generated", /* optional */ true, "Only present if transaction only input is a coinbase one."},
-           {RPCResult::Type::BOOL, "trusted", /* optional */ true, "Only present if we consider transaction to be trusted and so safe to spend from."},
+           {RPCResult::Type::BOOL, "generated", /* optional */ true, "Only present if the transaction's only input is a coinbase one."},
+           {RPCResult::Type::BOOL, "trusted", /* optional */ true, "Whether we consider the transaction to be trusted and safe to spend from.\n"
+                "Only present when the transaction has 0 confirmations (or negative confirmations, if conflicted)."},
            {RPCResult::Type::STR_HEX, "blockhash", /* optional */ true, "The block hash containing the transaction."},
            {RPCResult::Type::NUM, "blockheight", /* optional */ true, "The block height containing the transaction."},
            {RPCResult::Type::NUM, "blockindex", /* optional */ true, "The index of the transaction in the block that includes it."},
@@ -1408,7 +1409,7 @@ static const std::vector<RPCResult> TransactionDescriptionString()
            {RPCResult::Type::NUM_TIME, "timereceived", "The time received expressed in " + UNIX_EPOCH_TIME + "."},
            {RPCResult::Type::STR, "comment", /* optional */ true, "If a comment is associated with the transaction, only present if not empty."},
            {RPCResult::Type::STR, "bip125-replaceable", "(\"yes|no|unknown\") Whether this transaction could be replaced due to BIP125 (replace-by-fee);\n"
-               "may be unknown for unconfirmed transactions not in the mempool"}};
+               "may be unknown for unconfirmed transactions not in the mempool."}};
 }
 
 static RPCHelpMan listtransactions()

test/functional/wallet_import_rescan.py

@@ -99,7 +99,7 @@ def check(self, txid=None, amount=None, confirmation_height=None):
             assert_equal(tx["label"], self.label)
             assert_equal(tx["txid"], txid)
             assert_equal(tx["confirmations"], 1 + current_height - confirmation_height)
-            assert_equal("trusted" not in tx, True)
+            assert "trusted" not in tx
 
             address, = [ad for ad in addresses if txid in ad["txids"]]
             assert_equal(address["address"], self.address["address"])

test/functional/wallet_listsinceblock.py

@@ -44,6 +44,14 @@ def run_test(self):
     def test_no_blockhash(self):
         self.log.info("Test no blockhash")
         txid = self.nodes[2].sendtoaddress(self.nodes[0].getnewaddress(), 1)
+        self.sync_all()
+        assert_array_result(self.nodes[0].listtransactions(), {"txid": txid}, {
+            "category": "receive",
+            "amount": 1,
+            "confirmations": 0,
+            "trusted": False,
+        })
+
         blockhash, = self.generate(self.nodes[2], 1)
         blockheight = self.nodes[2].getblockheader(blockhash)['height']
         self.sync_all()
@@ -56,6 +64,9 @@ def test_no_blockhash(self):
             "blockheight": blockheight,
             "confirmations": 1,
         })
+        assert_equal(len(txs), 1)
+        assert "trusted" not in txs[0]
+
         assert_equal(
             self.nodes[0].listsinceblock(),
             {"lastblock": blockhash,

test/functional/wallet_listtransactions.py

@@ -31,10 +31,10 @@ def run_test(self):
         self.sync_all()
         assert_array_result(self.nodes[0].listtransactions(),
                             {"txid": txid},
-                            {"category": "send", "amount": Decimal("-0.1"), "confirmations": 0})
+                            {"category": "send", "amount": Decimal("-0.1"), "confirmations": 0, "trusted": True})
         assert_array_result(self.nodes[1].listtransactions(),
                             {"txid": txid},
-                            {"category": "receive", "amount": Decimal("0.1"), "confirmations": 0})
+                            {"category": "receive", "amount": Decimal("0.1"), "confirmations": 0, "trusted": False})
         self.log.info("Test confirmations change after mining a block")
         blockhash = self.generate(self.nodes[0], 1)[0]
         blockheight = self.nodes[0].getblockheader(blockhash)['height']