FillPSBT: report number of inputs signed (or would sign)

In FillPSBT, optionally report the number of inputs we successfully
signed, as an out parameter. If "sign" is false, instead report the
number of inputs for which GetSigningProvider does not return nullptr.
(This is a potentially overbroad estimate of inputs we could sign.)

2 files changed, 5 insertions, 3 deletions

diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
index 397403d308..b65eb72b1c 100644
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -335,9 +335,10 @@ public:
         bool sign,
         bool bip32derivs,
         PartiallySignedTransaction& psbtx,
-        bool& complete) override
+        bool& complete,
+        size_t* n_signed) override
     {
-        return m_wallet->FillPSBT(psbtx, complete, sighash_type, sign, bip32derivs);
+        return m_wallet->FillPSBT(psbtx, complete, sighash_type, sign, bip32derivs, n_signed);
     }
     WalletBalances getBalances() override
     {
diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
index 67569a3e55..e2161521f6 100644
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -197,7 +197,8 @@ public:
         bool sign,
         bool bip32derivs,
         PartiallySignedTransaction& psbtx,
-        bool& complete) = 0;
+        bool& complete,
+        size_t* n_signed) = 0;
 
     //! Get balances.
     virtual WalletBalances getBalances() = 0;