Use all input_addresses instead of actually selected inputs

Author: nielstron

pycardano/txbuilder.py

@@ -916,6 +916,20 @@ def build(
                 auto_ttl_offset = 10_000
             self.ttl = max(0, last_slot + auto_ttl_offset)
 
+        # Automatically set the required signers for smart transactions
+        if (
+                is_smart or auto_required_signers is not None
+        ) and self.required_signers is None:
+            # Collect all signatories from explicitly defined
+            # transaction inputs and collateral inputs, and input addresses
+            input_addresses = [i.output.address for i in self.inputs + self.collaterals] + [Address.from_primitive(a) for a in self.input_addresses]
+            required_signers = set(
+                a.payment_part
+                for a in input_addresses
+                if isinstance(a.payment_part, VerificationKeyHash)
+            )
+            self.required_signers = list(required_signers)
+
         selected_utxos = []
         selected_amount = Value()
         for i in self.inputs:
@@ -1047,18 +1061,6 @@ def build(
 
         self.inputs[:] = selected_utxos[:]
 
-        # Automatically set the required signers for smart transactions
-        if (
-            is_smart or auto_required_signers is not None
-        ) and self.required_signers is None:
-            # Collect all signatories from explicitly defined transaction inputs and collateral inputs
-            required_signers = set(
-                i.output.address.payment_part
-                for i in self.inputs + self.collaterals
-                if isinstance(i.output.address.payment_part, VerificationKeyHash)
-            )
-            self.required_signers = list(required_signers)
-
         self._set_redeemer_index()
 
         self._set_collateral_return(collateral_change_address or change_address)