feat: endpoints for gRPC sync module for ChainSync

internal/utxorpc/api.go

@@ -19,6 +19,7 @@ import (
 	"net/http"
 
 	"github.com/utxorpc/go-codegen/utxorpc/v1alpha/submit/submitconnect"
+	"github.com/utxorpc/go-codegen/utxorpc/v1alpha/sync/syncconnect"
 	"github.com/utxorpc/go-codegen/utxorpc/v1alpha/watch/watchconnect"
 	"golang.org/x/net/http2"
 	"golang.org/x/net/http2/h2c"
@@ -29,8 +30,10 @@ import (
 func Start(cfg *config.Config) error {
 	mux := http.NewServeMux()
 	submitPath, submitHandler := submitconnect.NewSubmitServiceHandler(&submitServiceServer{})
+	syncPath, syncHandler := syncconnect.NewChainSyncServiceHandler(&chainSyncServiceServer{})
 	watchPath, watchHandler := watchconnect.NewWatchServiceHandler(&watchServiceServer{})
 	mux.Handle(submitPath, submitHandler)
+	mux.Handle(syncPath, syncHandler)
 	mux.Handle(watchPath, watchHandler)
 	err := http.ListenAndServe(
 		fmt.Sprintf("%s:%d", cfg.Utxorpc.ListenAddress, cfg.Utxorpc.ListenPort),

internal/utxorpc/sync.go

@@ -0,0 +1,253 @@
+// Copyright 2024 Blink Labs Software
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utxorpc
+
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+	"log"
+
+	connect "connectrpc.com/connect"
+	"github.com/blinklabs-io/adder/event"
+	input_chainsync "github.com/blinklabs-io/adder/input/chainsync"
+	ocommon "github.com/blinklabs-io/gouroboros/protocol/common"
+	sync "github.com/utxorpc/go-codegen/utxorpc/v1alpha/sync"
+	"github.com/utxorpc/go-codegen/utxorpc/v1alpha/sync/syncconnect"
+
+	"github.com/blinklabs-io/cardano-node-api/internal/node"
+)
+
+// chainSyncServiceServer implements the ChainSyncService API
+type chainSyncServiceServer struct {
+	syncconnect.UnimplementedChainSyncServiceHandler
+}
+
+// FetchBlock
+func (s *chainSyncServiceServer) FetchBlock(
+	ctx context.Context,
+	req *connect.Request[sync.FetchBlockRequest],
+) (*connect.Response[sync.FetchBlockResponse], error) {
+	ref := req.Msg.GetRef() // BlockRef
+	fieldMask := req.Msg.GetFieldMask()
+	log.Printf("Got a FetchBlock request with ref %v and fieldMask %v", ref, fieldMask)
+
+	// Connect to node
+	oConn, err := node.GetConnection(nil)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		// Close Ouroboros connection
+		oConn.Close()
+	}()
+
+	resp := &sync.FetchBlockResponse{}
+	// Start client
+	var points []ocommon.Point
+	if len(ref) > 0 {
+		for _, blockRef := range ref {
+			blockIdx := blockRef.GetIndex()
+			blockHash := blockRef.GetHash()
+			hash, _ := hex.DecodeString(string(blockHash))
+			slot := uint64(blockIdx)
+			point := ocommon.NewPoint(slot, hash)
+			points = append(points, point)
+		}
+	} else {
+		tip, err := oConn.ChainSync().Client.GetCurrentTip()
+		if err != nil {
+			return nil, err
+		}
+		point := tip.Point
+		points = append(points, point)
+	}
+	log.Printf("points: %v", points)
+	// TODO: replace with something that works NtC
+	// for _, point := range points {
+	// 	log.Printf("Point Slot: %d, Hash: %x\n", point.Slot, point.Hash)
+	// 	block, err := oConn.BlockFetch().Client.GetBlock(
+	// 		ocommon.NewPoint(point.Slot, point.Hash),
+	// 	)
+	// 	if err != nil {
+	// 		return nil, err
+	// 	}
+	// 	var acb sync.AnyChainBlock
+	// 	var acbc sync.AnyChainBlock_Cardano
+	// 	ret := NewBlockFromBlock(block)
+	// 	acbc.Cardano = &ret
+	// 	acb.Chain = &acbc
+	// 	resp.Block = append(resp.Block, &acb)
+	// }
+
+	return connect.NewResponse(resp), nil
+}
+
+// DumpHistory
+func (s *chainSyncServiceServer) DumpHistory(
+	ctx context.Context,
+	req *connect.Request[sync.DumpHistoryRequest],
+) (*connect.Response[sync.DumpHistoryResponse], error) {
+	startToken := req.Msg.GetStartToken() // BlockRef
+	maxItems := req.Msg.GetMaxItems()
+	fieldMask := req.Msg.GetFieldMask()
+	log.Printf("Got a DumpHistory request with token %v and maxItems %d and fieldMask %v", startToken, maxItems, fieldMask)
+
+	// Connect to node
+	oConn, err := node.GetConnection(nil)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		// Close Ouroboros connection
+		oConn.Close()
+	}()
+
+	resp := &sync.DumpHistoryResponse{}
+	// Start client
+	log.Printf("startToken: %#v\n", startToken)
+	var startPoint ocommon.Point
+	if startToken != nil {
+		log.Printf("startToken != nil\n")
+		blockRef := startToken
+		blockIdx := blockRef.GetIndex()
+		blockHash := blockRef.GetHash()
+		hash, _ := hex.DecodeString(string(blockHash))
+		slot := uint64(blockIdx)
+		startPoint = ocommon.NewPoint(slot, hash)
+	} else {
+		log.Printf("getting tip\n")
+		tip, err := oConn.ChainSync().Client.GetCurrentTip()
+		if err != nil {
+			return nil, err
+		}
+		startPoint = tip.Point
+	}
+	log.Printf("startPoint slot %d, hash %x\n", startPoint.Slot, startPoint.Hash)
+	// TODO: why is this giving us 0?
+	start, end, err := oConn.ChainSync().Client.GetAvailableBlockRange(
+		[]ocommon.Point{startPoint},
+	)
+	if err != nil {
+		return nil, err
+	}
+	log.Printf("Start:     slot %d, hash %x\n", start.Slot, start.Hash)
+	log.Printf("End (tip): slot %d, hash %x\n", end.Slot, end.Hash)
+
+	return connect.NewResponse(resp), nil
+}
+
+// FollowTip
+func (s *chainSyncServiceServer) FollowTip(
+	ctx context.Context,
+	req *connect.Request[sync.FollowTipRequest],
+	stream *connect.ServerStream[sync.FollowTipResponse],
+) error {
+	intersect := req.Msg.GetIntersect() // []*BlockRef
+	log.Printf("Got a FollowTip request with intersect %v", intersect)
+
+	// Setup event channel
+	eventChan := make(chan event.Event, 10)
+	connCfg := node.ConnectionConfig{
+		ChainSyncEventChan: eventChan,
+	}
+	// Connect to node
+	oConn, err := node.GetConnection(&connCfg)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		// Close Ouroboros connection
+		oConn.Close()
+	}()
+
+	// Get our starting point
+	var point ocommon.Point
+	if len(intersect) > 0 {
+		for _, blockRef := range intersect {
+			blockIdx := blockRef.GetIndex()
+			blockHash := blockRef.GetHash()
+			log.Printf("BlockRef: idx: %d, hash: %x", blockIdx, blockHash)
+			hash, _ := hex.DecodeString(string(blockHash))
+			slot := uint64(blockIdx)
+			point = ocommon.NewPoint(slot, hash)
+		}
+	} else {
+		tip, _ := oConn.ChainSync().Client.GetCurrentTip()
+		point = tip.Point
+	}
+
+	// Start the sync with the node
+	err = oConn.ChainSync().Client.Sync([]ocommon.Point{point})
+	if err != nil {
+		log.Printf("ERROR: %s", err)
+		return err
+	}
+
+	// Wait for events
+	for {
+		evt, ok := <-eventChan
+		if !ok {
+			log.Printf("ERROR: channel closed")
+			return fmt.Errorf("ERROR: channel closed")
+		}
+
+		switch evt.Type {
+		case "chainsync.block":
+			resp := &sync.FollowTipResponse{}
+			// Get event context to get the block chain information
+			context := evt.Context
+			if context == nil {
+				log.Printf("ERROR: empty block context")
+				return fmt.Errorf("ERROR: empty block context")
+			}
+			bc := context.(input_chainsync.BlockContext)
+			// Get event payload to get the block data
+			payload := evt.Payload
+			if payload == nil {
+				log.Printf(
+					"ERROR: empty payload: block: %d, slot: %d",
+					bc.BlockNumber,
+					bc.SlotNumber,
+				)
+				return fmt.Errorf(
+					"ERROR: empty payload: block: %d, slot: %d",
+					bc.BlockNumber,
+					bc.SlotNumber,
+				)
+			}
+			be := payload.(input_chainsync.BlockEvent)
+			block := be.Block // gOuroboros Block
+
+			var acb sync.AnyChainBlock
+			var acbc sync.AnyChainBlock_Cardano
+			acbc.Cardano = block.Utxorpc()
+			acb.Chain = &acbc
+			var ftra sync.FollowTipResponse_Apply
+			ftra.Apply = &acb
+			resp.Action = &ftra
+			err = stream.Send(resp)
+			if err != nil {
+				return err
+			}
+			// Log event
+			log.Printf(
+				"block: slot: %d, hash: %s",
+				block.SlotNumber(),
+				block.Hash(),
+			)
+		}
+	}
+}