[rpc] walletcreatefundedpsbt: use wallet default RBF

Author: Sjors

src/rpc/rawtransaction.cpp

@@ -406,7 +406,11 @@ static UniValue createrawtransaction(const JSONRPCRequest& request)
         }, true
     );
 
-    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], request.params[3]);
+    bool rbf = false;
+    if (!request.params[3].isNull()) {
+        rbf = request.params[3].isTrue();
+    }
+    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], rbf);
 
     return EncodeHexTx(CTransaction(rawTx));
 }
@@ -1362,7 +1366,11 @@ UniValue createpsbt(const JSONRPCRequest& request)
         }, true
     );
 
-    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], request.params[3]);
+    bool rbf = false;
+    if (!request.params[3].isNull()) {
+        rbf = request.params[3].isTrue();
+    }
+    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], rbf);
 
     // Make a blank psbt
     PartiallySignedTransaction psbtx;

src/rpc/rawtransaction_util.cpp

@@ -19,7 +19,7 @@
 #include <util/rbf.h>
 #include <util/strencodings.h>
 
-CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, const UniValue& rbf)
+CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, bool rbf)
 {
     if (inputs_in.isNull() || outputs_in.isNull())
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, arguments 1 and 2 must be non-null");
@@ -37,8 +37,6 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
         rawTx.nLockTime = nLockTime;
     }
 
-    bool rbfOptIn = rbf.isTrue();
-
     for (unsigned int idx = 0; idx < inputs.size(); idx++) {
         const UniValue& input = inputs[idx];
         const UniValue& o = input.get_obj();
@@ -53,7 +51,7 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout must be positive");
 
         uint32_t nSequence;
-        if (rbfOptIn) {
+        if (rbf) {
             nSequence = MAX_BIP125_RBF_SEQUENCE; /* CTxIn::SEQUENCE_FINAL - 2 */
         } else if (rawTx.nLockTime) {
             nSequence = CTxIn::SEQUENCE_FINAL - 1;
@@ -125,7 +123,7 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
         }
     }
 
-    if (!rbf.isNull() && rawTx.vin.size() > 0 && rbfOptIn != SignalsOptInRBF(CTransaction(rawTx))) {
+    if (rbf && rawTx.vin.size() > 0 && !SignalsOptInRBF(CTransaction(rawTx))) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter combination: Sequence number(s) contradict replaceable option");
     }
 

src/rpc/rawtransaction_util.h

@@ -27,6 +27,6 @@ class COutPoint;
 UniValue SignTransaction(CMutableTransaction& mtx, const UniValue& prevTxs, FillableSigningProvider* keystore, std::map<COutPoint, Coin>& coins, bool tempKeystore, const UniValue& hashType);
 
 /** Create a transaction from univalue parameters */
-CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, const UniValue& rbf);
+CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, bool rbf);
 
 #endif // BITCOIN_RPC_RAWTRANSACTION_UTIL_H

src/wallet/rpcwallet.cpp

@@ -4055,7 +4055,7 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
                                     {"vout_index", RPCArg::Type::NUM, RPCArg::Optional::OMITTED, "The zero-based output index, before a change output is added."},
                                 },
                             },
-                            {"replaceable", RPCArg::Type::BOOL, /* default */ "false", "Marks this transaction as BIP125 replaceable.\n"
+                            {"replaceable", RPCArg::Type::BOOL, /* default */ "wallet default", "Marks this transaction as BIP125 replaceable.\n"
                             "                              Allows this transaction to be replaced by a transaction with higher fees"},
                             {"conf_target", RPCArg::Type::NUM, /* default */ "Fallback to wallet's confirmation target", "Confirmation target (in blocks)"},
                             {"estimate_mode", RPCArg::Type::STR, /* default */ "UNSET", "The fee estimate mode, must be one of:\n"
@@ -4090,7 +4090,13 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
 
     CAmount fee;
     int change_position;
-    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], request.params[3]["replaceable"]);
+    bool rbf = pwallet->m_signal_rbf;
+    const UniValue &replaceable_arg = request.params[3]["replaceable"];
+    if (!replaceable_arg.isNull()) {
+        RPCTypeCheckArgument(replaceable_arg, UniValue::VBOOL);
+        rbf = replaceable_arg.isTrue();
+    }
+    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], rbf);
     FundTransaction(pwallet, rawTx, fee, change_position, request.params[3]);
 
     // Make a blank psbt

test/functional/rpc_psbt.py

@@ -27,6 +27,11 @@ class PSBTTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = False
         self.num_nodes = 3
+        self.extra_args = [
+            ["-walletrbf=1"],
+            [],
+            []
+        ]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
@@ -207,26 +212,26 @@ def run_test(self):
         # replaceable arg
         block_height = self.nodes[0].getblockcount()
         unspent = self.nodes[0].listunspent()[0]
-        psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height+2, {"replaceable":True}, False)
+        psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height+2, {"replaceable": False}, False)
         decoded_psbt = self.nodes[0].decodepsbt(psbtx_info["psbt"])
         for tx_in, psbt_in in zip(decoded_psbt["tx"]["vin"], decoded_psbt["inputs"]):
-            assert_equal(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
+            assert tx_in["sequence"] > MAX_BIP125_RBF_SEQUENCE
             assert "bip32_derivs" not in psbt_in
         assert_equal(decoded_psbt["tx"]["locktime"], block_height+2)
 
-        # Same construction with only locktime set
-        psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height, {}, True)
+        # Same construction with only locktime set and RBF explicitly enabled
+        psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}], block_height, {"replaceable": True}, True)
         decoded_psbt = self.nodes[0].decodepsbt(psbtx_info["psbt"])
         for tx_in, psbt_in in zip(decoded_psbt["tx"]["vin"], decoded_psbt["inputs"]):
-            assert tx_in["sequence"] > MAX_BIP125_RBF_SEQUENCE
+            assert_equal(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
             assert "bip32_derivs" in psbt_in
         assert_equal(decoded_psbt["tx"]["locktime"], block_height)
 
         # Same construction without optional arguments
         psbtx_info = self.nodes[0].walletcreatefundedpsbt([{"txid":unspent["txid"], "vout":unspent["vout"]}], [{self.nodes[2].getnewaddress():unspent["amount"]+1}])
         decoded_psbt = self.nodes[0].decodepsbt(psbtx_info["psbt"])
         for tx_in in decoded_psbt["tx"]["vin"]:
-            assert tx_in["sequence"] > MAX_BIP125_RBF_SEQUENCE
+            assert_equal(tx_in["sequence"], MAX_BIP125_RBF_SEQUENCE)
         assert_equal(decoded_psbt["tx"]["locktime"], 0)
 
         # Make sure change address wallet does not have P2SH innerscript access to results in success