Make SignPSBTInput operate on a private SignatureData object

2 files changed, 13 insertions, 2 deletions

diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 4060111ff2..ea14abce4c 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -237,7 +237,7 @@ bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreato
     return sigdata.complete;
 }
 
-bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, SignatureData& sigdata, int index, int sighash)
+bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, int index, int sighash)
 {
     // if this input has a final scriptsig or scriptwitness, don't do anything with it
     if (!input.final_script_sig.empty() || !input.final_script_witness.IsNull()) {
@@ -245,6 +245,7 @@ bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& t
     }
 
     // Fill SignatureData with input info
+    SignatureData sigdata;
     input.FillSignatureData(sigdata);
 
     // Get UTXO
@@ -276,6 +277,16 @@ bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& t
     // Verify that a witness signature was produced in case one was required.
     if (require_witness_sig && !sigdata.witness) return false;
     input.FromSignatureData(sigdata);
+
+    // If both UTXO types are present, drop the unnecessary one.
+    if (input.non_witness_utxo && !input.witness_utxo.IsNull()) {
+        if (sigdata.witness) {
+            input.non_witness_utxo = nullptr;
+        } else {
+            input.witness_utxo.SetNull();
+        }
+    }
+
     return sig_complete;
 }
 
diff --git a/src/script/sign.h b/src/script/sign.h
index a4e1eac403..160b3be75b 100644
--- a/src/script/sign.h
+++ b/src/script/sign.h
@@ -696,7 +696,7 @@ bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, C
 bool SignSignature(const SigningProvider &provider, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType);
 
 /** Signs a PSBTInput, verifying that all provided data matches what is being signed. */
-bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, SignatureData& sigdata, int index, int sighash = 1);
+bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, int index, int sighash = SIGHASH_ALL);
 
 /** Extract signature data from a transaction input, and insert it. */
 SignatureData DataFromTransaction(const CMutableTransaction& tx, unsigned int nIn, const CTxOut& txout);