fix index-out-of-range

babylonlabs-io · Oct 14, 2024 · ee17d0f · ee17d0f
1 parent 47956ed
commit ee17d0f
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/submitter/relayer/relayer.go b/submitter/relayer/relayer.go
@@ -514,6 +514,10 @@ func (rl *Relayer) buildTxWithData(data []byte, firstTx *wire.MsgTx) (*types.Btc
 		return nil, err
 	}
 
+	if len(rawTxResult.Transaction.TxOut) <= changePosition {
+		return nil, fmt.Errorf("transaction doesn't have change output %s", rawTxResult.Transaction.TxID())
+	}
+
 	rl.logger.Debugf("Building a BTC tx using %s with data %x", rawTxResult.Transaction.TxID(), data)
 
 	_, addresses, _, err := txscript.ExtractPkScriptAddrs(