Update getTxn rpc with events data

cmd/soroban-rpc/internal/methods/get_transaction.go

@@ -56,6 +56,10 @@ type GetTransactionResponse struct {
 	Ledger uint32 `json:"ledger,omitempty"`
 	// LedgerCloseTime is the unix timestamp of when the transaction was included in the ledger.
 	LedgerCloseTime int64 `json:"createdAt,string,omitempty"`
+
+	// DiagnosticEventsXDR is present only if Status is equal to TransactionFailed.
+	// DiagnosticEventsXDR is a base64-encoded slice of xdr.DiagnosticEvent
+	DiagnosticEventsXDR []string `json:"diagnosticEventsXdr,omitempty"`
 }
 
 type GetTransactionRequest struct {
@@ -104,6 +108,8 @@ func GetTransaction(getter transactionGetter, request GetTransactionRequest) (Ge
 	response.ResultXdr = base64.StdEncoding.EncodeToString(tx.Result)
 	response.EnvelopeXdr = base64.StdEncoding.EncodeToString(tx.Envelope)
 	response.ResultMetaXdr = base64.StdEncoding.EncodeToString(tx.Meta)
+	response.DiagnosticEventsXDR = base64EncodeSlice(tx.Events)
+
 	if tx.Successful {
 		response.Status = TransactionStatusSuccess
 	} else {

cmd/soroban-rpc/internal/methods/get_transaction_test.go

@@ -154,6 +154,7 @@ func TestGetTransaction(t *testing.T) {
 		ResultMetaXdr:         expectedTxMeta,
 		Ledger:                101,
 		LedgerCloseTime:       2625,
+		DiagnosticEventsXDR:   []string{},
 	}, tx)
 
 	// ingest another (failed) transaction
@@ -177,6 +178,7 @@ func TestGetTransaction(t *testing.T) {
 		ResultMetaXdr:         expectedTxMeta,
 		Ledger:                101,
 		LedgerCloseTime:       2625,
+		DiagnosticEventsXDR:   []string{},
 	}, tx)
 
 	// the new transaction should also be there
@@ -206,5 +208,6 @@ func TestGetTransaction(t *testing.T) {
 		ResultMetaXdr:         expectedTxMeta,
 		Ledger:                102,
 		LedgerCloseTime:       2650,
+		DiagnosticEventsXDR:   []string{},
 	}, tx)
 }

cmd/soroban-rpc/internal/transactions/transactions.go

@@ -146,9 +146,10 @@ type LedgerInfo struct {
 }
 
 type Transaction struct {
-	Result           []byte // XDR encoded xdr.TransactionResult
-	Meta             []byte // XDR encoded xdr.TransactionMeta
-	Envelope         []byte // XDR encoded xdr.TransactionEnvelope
+	Result           []byte   // XDR encoded xdr.TransactionResult
+	Meta             []byte   // XDR encoded xdr.TransactionMeta
+	Envelope         []byte   // XDR encoded xdr.TransactionEnvelope
+	Events           [][]byte // XDR encoded xdr.DiagnosticEvent
 	FeeBump          bool
 	ApplicationOrder int32
 	Successful       bool
@@ -198,10 +199,33 @@ func (m *MemoryStore) GetTransaction(hash xdr.Hash) (Transaction, bool, StoreRan
 	if !ok {
 		return Transaction{}, false, storeRange
 	}
+
+	var txMeta xdr.TransactionMeta
+	err := txMeta.UnmarshalBinary(internalTx.meta)
+	if err != nil {
+		return Transaction{}, false, storeRange
+	}
+
+	txEvents, err := txMeta.GetDiagnosticEvents()
+	if err != nil {
+		return Transaction{}, false, storeRange
+	}
+
+	events := make([][]byte, 0, len(txEvents))
+
+	for _, e := range txEvents {
+		diagnosticEventXDR, err := e.MarshalBinary()
+		if err != nil {
+			return Transaction{}, false, storeRange
+		}
+		events = append(events, diagnosticEventXDR)
+	}
+
 	tx := Transaction{
 		Result:           internalTx.result,
 		Meta:             internalTx.meta,
 		Envelope:         internalTx.envelope,
+		Events:           events,
 		FeeBump:          internalTx.feeBump,
 		Successful:       internalTx.successful,
 		ApplicationOrder: internalTx.applicationOrder,

cmd/soroban-rpc/internal/transactions/transactions_test.go

@@ -20,6 +20,7 @@ func expectedTransaction(t *testing.T, ledger uint32, feeBump bool) Transaction
 		FeeBump:          feeBump,
 		ApplicationOrder: 1,
 		Ledger:           expectedLedgerInfo(ledger),
+		Events:           [][]byte{},
 	}
 	var err error
 	tx.Result, err = transactionResult(ledger, feeBump).MarshalBinary()
@@ -204,6 +205,42 @@ func txMeta(ledgerSequence uint32, feeBump bool) xdr.LedgerCloseMeta {
 	}
 }
 
+func txMetaWithEvents(ledgerSequence uint32, feeBump bool) xdr.LedgerCloseMeta {
+	tx := txMeta(ledgerSequence, feeBump)
+	contractIDBytes, _ := hex.DecodeString("df06d62447fd25da07c0135eed7557e5a5497ee7d15b7fe345bd47e191d8f577")
+	var contractID xdr.Hash
+	copy(contractID[:], contractIDBytes)
+	counter := xdr.ScSymbol("COUNTER")
+
+	tx.V1.TxProcessing[0].TxApplyProcessing.V3 = &xdr.TransactionMetaV3{
+		SorobanMeta: &xdr.SorobanTransactionMeta{
+			Events: []xdr.ContractEvent{{
+				ContractId: &contractID,
+				Type:       xdr.ContractEventTypeContract,
+				Body: xdr.ContractEventBody{
+					V: 0,
+					V0: &xdr.ContractEventV0{
+						Topics: []xdr.ScVal{{
+							Type: xdr.ScValTypeScvSymbol,
+							Sym:  &counter,
+						}},
+						Data: xdr.ScVal{
+							Type: xdr.ScValTypeScvSymbol,
+							Sym:  &counter,
+						},
+					},
+				},
+			}},
+			ReturnValue: xdr.ScVal{
+				Type: xdr.ScValTypeScvSymbol,
+				Sym:  &counter,
+			},
+		},
+	}
+
+	return tx
+}
+
 func txEnvelope(ledgerSequence uint32, feeBump bool) xdr.TransactionEnvelope {
 	var envelope xdr.TransactionEnvelope
 	var err error
@@ -311,6 +348,34 @@ func TestIngestTransactions(t *testing.T) {
 	require.Len(t, store.transactions, 3)
 }
 
+func TestGetTransactionsWithEventData(t *testing.T) {
+	store := NewMemoryStore(interfaces.MakeNoOpDeamon(), "passphrase", 100)
+
+	// Insert ledger 1
+	metaWithEvents := txMetaWithEvents(1, false)
+	require.NoError(t, store.IngestTransactions(metaWithEvents))
+	require.Len(t, store.transactions, 1)
+
+	// check events data
+	tx, ok, _ := store.GetTransaction(txHash(1, false))
+	require.True(t, ok)
+	require.NotNil(t, tx.Events)
+	require.Len(t, tx.Events, 1)
+
+	var event xdr.DiagnosticEvent
+	err := event.UnmarshalBinary(tx.Events[0])
+	require.Nil(t, err)
+	require.Equal(t, xdr.ContractEventTypeContract, event.Event.Type)
+	require.Equal(t, int32(0), event.Event.Body.V)
+
+	require.NotNil(t, event.Event.Body.V0.Topics)
+	require.Equal(t, xdr.ScValTypeScvSymbol, event.Event.Body.V0.Topics[0].Type)
+
+	require.NotNil(t, event.Event.Body.V0.Data)
+	require.Equal(t, xdr.ScValTypeScvSymbol, event.Event.Body.V0.Data.Type)
+
+}
+
 func stableHeapInUse() int64 {
 	var (
 		m         = runtime.MemStats{}

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
-	github.com/stellar/go v0.0.0-20240202231803-b0df9f046eb4
+	github.com/stellar/go v0.0.0-20240207003209-73de95c8eb55
 	github.com/stretchr/testify v1.8.4
 	golang.org/x/mod v0.13.0
 	gotest.tools/v3 v3.5.0

go.sum

@@ -366,8 +366,8 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/viper v1.17.0 h1:I5txKw7MJasPL/BrfkbA0Jyo/oELqVmux4pR/UxOMfI=
 github.com/spf13/viper v1.17.0/go.mod h1:BmMMMLQXSbcHK6KAOiFLz0l5JHrU89OdIRHvsk0+yVI=
-github.com/stellar/go v0.0.0-20240202231803-b0df9f046eb4 h1:1DQT7eta18GSv+z6wF7AMUf7NqQ0qOrr2uJPGMRakRg=
-github.com/stellar/go v0.0.0-20240202231803-b0df9f046eb4/go.mod h1:Ka4piwZT4Q9799f+BZeaKkAiYo4UpIWXyu0oSUbCVfM=
+github.com/stellar/go v0.0.0-20240207003209-73de95c8eb55 h1:YBpAp7uPf/lzGxKPOGh1D05bX7uDVybA39BYoPXpRu4=
+github.com/stellar/go v0.0.0-20240207003209-73de95c8eb55/go.mod h1:Ka4piwZT4Q9799f+BZeaKkAiYo4UpIWXyu0oSUbCVfM=
 github.com/stellar/go-xdr v0.0.0-20231122183749-b53fb00bcac2 h1:OzCVd0SV5qE3ZcDeSFCmOWLZfEWZ3Oe8KtmSOYKEVWE=
 github.com/stellar/go-xdr v0.0.0-20231122183749-b53fb00bcac2/go.mod h1:yoxyU/M8nl9LKeWIoBrbDPQ7Cy+4jxRcWcOayZ4BMps=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=