test: Return new_utxos from create_self_transfer_multi in MiniWallet

test/functional/feature_dbcrash.py

@@ -192,14 +192,12 @@ class ChainstateWriteCrashTest(BitcoinTestFramework):
                 # Sanity check -- if we chose inputs that are too small, skip
                 continue
 
-            tx = self.wallet.create_self_transfer_multi(
+            self.wallet.send_self_transfer_multi(
                 from_node=node,
                 utxos_to_spend=utxos_to_spend,
                 num_outputs=3,
-                fee_per_output=FEE // 3)
-
-            # Send the transaction to get into the mempool (skip fee-checks to run faster)
-            node.sendrawtransaction(hexstring=tx.serialize().hex(), maxfeerate=0)
+                fee_per_output=FEE // 3,
+            )
             num_transactions += 1
 
     def run_test(self):

test/functional/feature_fee_estimation.py

@@ -52,7 +52,8 @@ def small_txpuzzle_randfee(
         raise RuntimeError(f"Insufficient funds: need {amount + fee}, have {total_in}")
     tx = wallet.create_self_transfer_multi(
         utxos_to_spend=utxos_to_spend,
-        fee_per_output=0)
+        fee_per_output=0,
+    )["tx"]
     tx.vout[0].nValue = int((total_in - amount - fee) * COIN)
     tx.vout.append(deepcopy(tx.vout[0]))
     tx.vout[1].nValue = int(amount * COIN)

test/functional/feature_rbf.py

@@ -472,11 +472,10 @@ class ReplaceByFeeTest(BitcoinTestFramework):
 
             # Now attempt to submit a tx that double-spends all the root tx inputs, which
             # would invalidate `num_txs_invalidated` transactions.
-            double_tx = wallet.create_self_transfer_multi(
+            tx_hex = wallet.create_self_transfer_multi(
                 utxos_to_spend=root_utxos,
                 fee_per_output=10_000_000,  # absurdly high feerate
-            )
-            tx_hex = double_tx.serialize().hex()
+            )["hex"]
 
             if failure_expected:
                 assert_raises_rpc_error(

test/functional/test_framework/wallet.py

@@ -209,20 +209,10 @@ class MiniWallet:
         return txid, 1
 
     def send_self_transfer_multi(self, *, from_node, **kwargs):
-        """
-        Create and send a transaction that spends the given UTXOs and creates a
-        certain number of outputs with equal amounts.
-
-        Returns a dictionary with
-            - txid
-            - serialized transaction in hex format
-            - transaction as CTransaction instance
-            - list of newly created UTXOs, ordered by vout index
-        """
+        """Call create_self_transfer_multi and send the transaction."""
         tx = self.create_self_transfer_multi(**kwargs)
-        txid = self.sendrawtransaction(from_node=from_node, tx_hex=tx.serialize().hex())
-        return {'new_utxos': [self.get_utxo(txid=txid, vout=vout) for vout in range(len(tx.vout))],
-                'txid': txid, 'hex': tx.serialize().hex(), 'tx': tx}
+        self.sendrawtransaction(from_node=from_node, tx_hex=tx["hex"])
+        return tx
 
     def create_self_transfer_multi(
         self,
@@ -256,7 +246,18 @@ class MiniWallet:
         outputs_value_total = inputs_value_total - fee_per_output * num_outputs
         for o in tx.vout:
             o.nValue = outputs_value_total // num_outputs
-        return tx
+        txid = tx.rehash()
+        return {
+            "new_utxos": [self._create_utxo(
+                txid=txid,
+                vout=i,
+                value=Decimal(tx.vout[i].nValue) / COIN,
+                height=0,
+            ) for i in range(len(tx.vout))],
+            "txid": txid,
+            "hex": tx.serialize().hex(),
+            "tx": tx,
+        }
 
     def create_self_transfer(self, *, fee_rate=Decimal("0.003"), utxo_to_spend=None, locktime=0, sequence=0):
         """Create and return a tx with the specified fee_rate. Fee may be exact or at most one satoshi higher than needed."""