diff --git a/parser.go b/parser.go
index cceccfa..aea992c 100644
--- a/parser.go
+++ b/parser.go
@@ -127,6 +127,9 @@ func (tx *Tx) Parser() error {
 			//fmt.Printf("parser failed tx error: %s,  block: %d tx: %s\n", err, tx.Block, tx.GetTxHash())
 		}
 		if len(swaps) > 0 {
+			for i := range swaps {
+				swaps[i].InstrIdx = tx.Err.Index
+			}
 			tx.Swaps = swaps
 		}
 		for i, instr := range tx.rawTx.Transaction.Message.Instructions {
@@ -172,6 +175,7 @@ func (tx *Tx) Parser() error {
 						swap.AfterSOLBalance = decimal.NewFromUint64(tx.rawTx.Meta.PostBalances[userIdx]).Div(decimal.NewFromInt(1e9))
 					}
 				}
+				swap.InstrIdx = uint8(i)
 				tx.Swaps = append(tx.Swaps, swap)
 			}
 
@@ -219,6 +223,7 @@ func (tx *Tx) Parser() error {
 								swap.AfterSOLBalance = decimal.NewFromUint64(tx.rawTx.Meta.PostBalances[userIdx]).Div(decimal.NewFromInt(1e9))
 							}
 						}
+						swap.InstrIdx = uint8(i)
 						tx.Swaps = append(tx.Swaps, swap)
 					}
 					// tx.Swaps = append(tx.Swaps, swaps...)
diff --git a/tx.go b/tx.go
index d06537d..cca598c 100644
--- a/tx.go
+++ b/tx.go
@@ -12,6 +12,8 @@ type Swap struct {
 
 	TxIndex int
 
+	InstrIdx uint8
+
 	Pool      solana.PublicKey
 	BaseMint  solana.PublicKey
 	QuoteMint solana.PublicKey