Refactor getVersionInfo and getNetwork RPC to not use HTTP endpoint /info on core

cmd/soroban-rpc/internal/daemon/interfaces/interfaces.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/prometheus/client_golang/prometheus"
 
+	"github.com/stellar/go/ingest/ledgerbackend"
 	proto "github.com/stellar/go/protocols/stellarcore"
 )
 
@@ -15,6 +16,7 @@ type Daemon interface {
 	MetricsRegistry() *prometheus.Registry
 	MetricsNamespace() string
 	CoreClient() CoreClient
+	GetCore() *ledgerbackend.CaptiveStellarCore
 }
 
 type CoreClient interface {

cmd/soroban-rpc/internal/daemon/interfaces/noOpDaemon.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/prometheus/client_golang/prometheus"
 
+	"github.com/stellar/go/ingest/ledgerbackend"
 	proto "github.com/stellar/go/protocols/stellarcore"
 )
 
@@ -14,6 +15,7 @@ type NoOpDaemon struct {
 	metricsRegistry  *prometheus.Registry
 	metricsNamespace string
 	coreClient       noOpCoreClient
+	core             *ledgerbackend.CaptiveStellarCore
 }
 
 func MakeNoOpDeamon() *NoOpDaemon {
@@ -36,6 +38,10 @@ func (d *NoOpDaemon) CoreClient() CoreClient {
 	return d.coreClient
 }
 
+func (d *NoOpDaemon) GetCore() *ledgerbackend.CaptiveStellarCore {
+	return d.core
+}
+
 type noOpCoreClient struct{}
 
 func (s noOpCoreClient) Info(context.Context) (*proto.InfoResponse, error) {

cmd/soroban-rpc/internal/daemon/metrics.go

@@ -9,6 +9,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/collectors"
 
 	"github.com/stellar/go/clients/stellarcore"
+	"github.com/stellar/go/ingest/ledgerbackend"
 	proto "github.com/stellar/go/protocols/stellarcore"
 	supportlog "github.com/stellar/go/support/log"
 	"github.com/stellar/go/support/logmetrics"
@@ -106,6 +107,10 @@ func (d *Daemon) CoreClient() interfaces.CoreClient {
 	return d.coreClient
 }
 
+func (d *Daemon) GetCore() *ledgerbackend.CaptiveStellarCore {
+	return d.core
+}
+
 func (d *Daemon) Logger() *supportlog.Entry {
 	return d.logger
 }

cmd/soroban-rpc/internal/jsonrpc.go

@@ -168,8 +168,13 @@ func NewJSONRPCHandler(cfg *config.Config, params HandlerParams) Handler {
 			requestDurationLimit: cfg.MaxGetEventsExecutionDuration,
 		},
 		{
-			methodName:           "getNetwork",
-			underlyingHandler:    methods.NewGetNetworkHandler(params.Daemon, cfg.NetworkPassphrase, cfg.FriendbotURL),
+			methodName: "getNetwork",
+			underlyingHandler: methods.NewGetNetworkHandler(
+				cfg.NetworkPassphrase,
+				cfg.FriendbotURL,
+				params.LedgerEntryReader,
+				params.LedgerReader,
+			),
 			longName:             "get_network",
 			queueLimit:           cfg.RequestBacklogGetNetworkQueueLimit,
 			requestDurationLimit: cfg.MaxGetNetworkExecutionDuration,

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

@@ -5,7 +5,7 @@ import (
 
 	"github.com/creachadair/jrpc2"
 
-	"github.com/stellar/soroban-rpc/cmd/soroban-rpc/internal/daemon/interfaces"
+	"github.com/stellar/soroban-rpc/cmd/soroban-rpc/internal/db"
 )
 
 type GetNetworkRequest struct{}
@@ -17,20 +17,25 @@ type GetNetworkResponse struct {
 }
 
 // NewGetNetworkHandler returns a json rpc handler to for the getNetwork method
-func NewGetNetworkHandler(daemon interfaces.Daemon, networkPassphrase, friendbotURL string) jrpc2.Handler {
-	coreClient := daemon.CoreClient()
+func NewGetNetworkHandler(
+	networkPassphrase string,
+	friendbotURL string,
+	ledgerEntryReader db.LedgerEntryReader,
+	ledgerReader db.LedgerReader,
+) jrpc2.Handler {
 	return NewHandler(func(ctx context.Context, request GetNetworkRequest) (GetNetworkResponse, error) {
-		info, err := coreClient.Info(ctx)
+		protocolVersion, err := getProtocolVersion(ctx, ledgerEntryReader, ledgerReader)
 		if err != nil {
-			return GetNetworkResponse{}, (&jrpc2.Error{
+			return GetNetworkResponse{}, &jrpc2.Error{
 				Code:    jrpc2.InternalError,
 				Message: err.Error(),
-			})
+			}
 		}
+
 		return GetNetworkResponse{
 			FriendbotURL:    friendbotURL,
 			Passphrase:      networkPassphrase,
-			ProtocolVersion: info.Info.ProtocolVersion,
+			ProtocolVersion: int(protocolVersion),
 		}, nil
 	})
 }

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

@@ -22,35 +22,19 @@ type GetVersionInfoResponse struct {
 	ProtocolVersion    uint32 `json:"protocol_version"`     //nolint:tagliatelle
 }
 
-func NewGetVersionInfoHandler(logger *log.Entry, ledgerEntryReader db.LedgerEntryReader, ledgerReader db.LedgerReader, daemon interfaces.Daemon) jrpc2.Handler {
-	coreClient := daemon.CoreClient()
-	return handler.New(func(ctx context.Context) (GetVersionInfoResponse, error) {
-		var captiveCoreVersion string
-		info, err := coreClient.Info(ctx)
-		if err != nil {
-			logger.WithError(err).Info("error occurred while calling Info endpoint of core")
-		} else {
-			captiveCoreVersion = info.Info.Build
-		}
-
-		// Fetch Protocol version
-		var protocolVersion uint32
-		readTx, err := ledgerEntryReader.NewCachedTx(ctx)
-		if err != nil {
-			logger.WithError(err).Info("Cannot create read transaction")
-		}
-		defer func() {
-			_ = readTx.Done()
-		}()
+func NewGetVersionInfoHandler(
+	logger *log.Entry,
+	ledgerEntryReader db.LedgerEntryReader,
+	ledgerReader db.LedgerReader,
+	daemon interfaces.Daemon,
+) jrpc2.Handler {
+	core := daemon.GetCore()
 
-		latestLedger, err := readTx.GetLatestLedgerSequence()
-		if err != nil {
-			logger.WithError(err).Info("error occurred while getting latest ledger")
-		}
-
-		_, protocolVersion, err = getBucketListSizeAndProtocolVersion(ctx, ledgerReader, latestLedger)
+	return handler.New(func(ctx context.Context) (GetVersionInfoResponse, error) {
+		captiveCoreVersion := core.GetCoreVersion()
+		protocolVersion, err := getProtocolVersion(ctx, ledgerEntryReader, ledgerReader)
 		if err != nil {
-			logger.WithError(err).Info("error occurred while fetching protocol version")
+			logger.WithError(err).Error("failed to fetch protocol version")
 		}
 
 		return GetVersionInfoResponse{

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

@@ -286,7 +286,11 @@ func base64EncodeSlice(in [][]byte) []string {
 	return result
 }
 
-func getBucketListSizeAndProtocolVersion(ctx context.Context, ledgerReader db.LedgerReader, latestLedger uint32) (uint64, uint32, error) {
+func getBucketListSizeAndProtocolVersion(
+	ctx context.Context,
+	ledgerReader db.LedgerReader,
+	latestLedger uint32,
+) (uint64, uint32, error) {
 	// obtain bucket size
 	closeMeta, ok, err := ledgerReader.GetLedger(ctx, latestLedger)
 	if err != nil {

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

@@ -0,0 +1,32 @@
+package methods
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/stellar/soroban-rpc/cmd/soroban-rpc/internal/db"
+)
+
+func getProtocolVersion(
+	ctx context.Context,
+	ledgerEntryReader db.LedgerEntryReader,
+	ledgerReader db.LedgerReader,
+) (uint32, error) {
+	latestLedger, err := ledgerEntryReader.GetLatestLedgerSequence(ctx)
+	if err != nil {
+		return 0, err
+	}
+
+	// obtain bucket size
+	closeMeta, ok, err := ledgerReader.GetLedger(ctx, latestLedger)
+	if err != nil {
+		return 0, err
+	}
+	if !ok {
+		return 0, fmt.Errorf("missing meta for latest ledger (%d)", latestLedger)
+	}
+	if closeMeta.V != 1 {
+		return 0, fmt.Errorf("latest ledger (%d) meta has unexpected verion (%d)", latestLedger, closeMeta.V)
+	}
+	return uint32(closeMeta.V1.LedgerHeader.Header.LedgerVersion), nil
+}

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

@@ -0,0 +1,92 @@
+package methods
+
+import (
+	"context"
+	"path"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/stellar/go/support/log"
+	"github.com/stellar/go/xdr"
+
+	"github.com/stellar/soroban-rpc/cmd/soroban-rpc/internal/daemon/interfaces"
+	"github.com/stellar/soroban-rpc/cmd/soroban-rpc/internal/db"
+)
+
+func BenchmarkGetProtocolVersion(b *testing.B) {
+	dbx := NewTestDB(b)
+	daemon := interfaces.MakeNoOpDeamon()
+
+	ledgerReader := db.NewLedgerReader(dbx)
+	_, exists, err := ledgerReader.GetLedger(context.Background(), 1)
+	require.NoError(b, err)
+	assert.False(b, exists)
+
+	ledgerSequence := uint32(1)
+	tx, err := db.NewReadWriter(log.DefaultLogger, dbx, daemon, 150, 15, "passphrase").NewTx(context.Background())
+	require.NoError(b, err)
+	require.NoError(b, tx.LedgerWriter().InsertLedger(createMockLedgerCloseMeta(ledgerSequence)))
+	require.NoError(b, tx.Commit(ledgerSequence))
+
+	ledgerEntryReader := db.NewLedgerEntryReader(dbx)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, err := getProtocolVersion(context.TODO(), ledgerEntryReader, ledgerReader)
+		if err != nil {
+			b.Fatalf("getProtocolVersion failed: %v", err)
+		}
+	}
+}
+
+func TestGetProtocolVersion(t *testing.T) {
+	dbx := NewTestDB(t)
+	daemon := interfaces.MakeNoOpDeamon()
+
+	ledgerReader := db.NewLedgerReader(dbx)
+	_, exists, err := ledgerReader.GetLedger(context.Background(), 1)
+	require.NoError(t, err)
+	assert.False(t, exists)
+
+	ledgerSequence := uint32(1)
+	tx, err := db.NewReadWriter(log.DefaultLogger, dbx, daemon, 150, 15, "passphrase").NewTx(context.Background())
+	require.NoError(t, err)
+	require.NoError(t, tx.LedgerWriter().InsertLedger(createMockLedgerCloseMeta(ledgerSequence)))
+	require.NoError(t, tx.Commit(ledgerSequence))
+
+	ledgerEntryReader := db.NewLedgerEntryReader(dbx)
+	protocolVersion, err := getProtocolVersion(context.TODO(), ledgerEntryReader, ledgerReader)
+	require.NoError(t, err)
+	require.Equal(t, uint32(20), protocolVersion)
+}
+
+func createMockLedgerCloseMeta(ledgerSequence uint32) xdr.LedgerCloseMeta {
+	return xdr.LedgerCloseMeta{
+		V: 1,
+		V1: &xdr.LedgerCloseMetaV1{
+			LedgerHeader: xdr.LedgerHeaderHistoryEntry{
+				Hash: xdr.Hash{},
+				Header: xdr.LedgerHeader{
+					LedgerSeq:     xdr.Uint32(ledgerSequence),
+					LedgerVersion: xdr.Uint32(20),
+				},
+			},
+			TxSet: xdr.GeneralizedTransactionSet{
+				V:       1,
+				V1TxSet: &xdr.TransactionSetV1{},
+			},
+		},
+	}
+}
+
+func NewTestDB(tb testing.TB) *db.DB {
+	tmp := tb.TempDir()
+	dbPath := path.Join(tmp, "db.sqlite")
+	db, err := db.OpenSQLiteDB(dbPath)
+	require.NoError(tb, err)
+	tb.Cleanup(func() {
+		require.NoError(tb, db.Close())
+	})
+	return db
+}