feat: finish implementing server side of tx-submission

protocol/txsubmission/server.go

@@ -22,12 +22,18 @@ import (
 
 type Server struct {
 	*protocol.Protocol
-	config *Config
+	config                 *Config
+	ackCount               int
+	stateDone              bool
+	requestTxIdsResultChan chan []TxIdAndSize
+	requestTxsResultChan   chan []TxBody
 }
 
 func NewServer(protoOptions protocol.ProtocolOptions, cfg *Config) *Server {
 	s := &Server{
-		config: cfg,
+		config:                 cfg,
+		requestTxIdsResultChan: make(chan []TxIdAndSize),
+		requestTxsResultChan:   make(chan []TxBody),
 	}
 	protoConfig := protocol.ProtocolConfig{
 		Name:                ProtocolName,
@@ -42,6 +48,12 @@ func NewServer(protoOptions protocol.ProtocolOptions, cfg *Config) *Server {
 		InitialState:        stateInit,
 	}
 	s.Protocol = protocol.New(protoConfig)
+	// Start goroutine to cleanup resources on protocol shutdown
+	go func() {
+		<-s.Protocol.DoneChan()
+		close(s.requestTxIdsResultChan)
+		close(s.requestTxsResultChan)
+	}()
 	return s
 }
 
@@ -66,36 +78,57 @@ func (s *Server) messageHandler(msg protocol.Message, isResponse bool) error {
 	return err
 }
 
-func (s *Server) handleReplyTxIds(msg protocol.Message) error {
-	if s.config.ReplyTxIdsFunc == nil {
-		return fmt.Errorf(
-			"received tx-submission ReplyTxIds message but no callback function is defined",
-		)
+func (s *Server) RequestTxIds(blocking bool, reqCount int) ([]TxIdAndSize, error) {
+	if s.stateDone {
+		return nil, protocol.ProtocolShuttingDownError
 	}
+	msg := NewMsgRequestTxIds(blocking, uint16(s.ackCount), uint16(reqCount))
+	if err := s.SendMessage(msg); err != nil {
+		return nil, err
+	}
+	// Reset ack count
+	s.ackCount = 0
+	// Wait for result
+	txIds, ok := <-s.requestTxIdsResultChan
+	if !ok {
+		return nil, protocol.ProtocolShuttingDownError
+	}
+	return txIds, nil
+}
+
+func (s *Server) RequestTxs(txIds []TxId) ([]TxBody, error) {
+	if s.stateDone {
+		return nil, protocol.ProtocolShuttingDownError
+	}
+	msg := NewMsgRequestTxs(txIds)
+	if err := s.SendMessage(msg); err != nil {
+		return nil, err
+	}
+	// Wait for result
+	txs, ok := <-s.requestTxsResultChan
+	if !ok {
+		return nil, protocol.ProtocolShuttingDownError
+	}
+	// Set the ack count for the next RequestTxIds request based on the number we got for this one
+	s.ackCount = len(txs)
+	return txs, nil
+}
+
+func (s *Server) handleReplyTxIds(msg protocol.Message) error {
 	msgReplyTxIds := msg.(*MsgReplyTxIds)
-	// Call the user callback function
-	return s.config.ReplyTxIdsFunc(msgReplyTxIds.TxIds)
+	s.requestTxIdsResultChan <- msgReplyTxIds.TxIds
+	return nil
 }
 
 func (s *Server) handleReplyTxs(msg protocol.Message) error {
-	if s.config.ReplyTxsFunc == nil {
-		return fmt.Errorf(
-			"received tx-submission ReplyTxs message but no callback function is defined",
-		)
-	}
 	msgReplyTxs := msg.(*MsgReplyTxs)
-	// Call the user callback function
-	return s.config.ReplyTxsFunc(msgReplyTxs.Txs)
+	s.requestTxsResultChan <- msgReplyTxs.Txs
+	return nil
 }
 
 func (s *Server) handleDone() error {
-	if s.config.DoneFunc == nil {
-		return fmt.Errorf(
-			"received tx-submission Done message but no callback function is defined",
-		)
-	}
-	// Call the user callback function
-	return s.config.DoneFunc()
+	s.stateDone = true
+	return nil
 }
 
 func (s *Server) handleInit() error {

protocol/txsubmission/txsubmission.go

@@ -114,20 +114,14 @@ type TxSubmission struct {
 
 type Config struct {
 	RequestTxIdsFunc RequestTxIdsFunc
-	ReplyTxIdsFunc   ReplyTxIdsFunc
 	RequestTxsFunc   RequestTxsFunc
-	ReplyTxsFunc     ReplyTxsFunc
-	DoneFunc         DoneFunc
 	InitFunc         InitFunc
 	IdleTimeout      time.Duration
 }
 
 // Callback function types
 type RequestTxIdsFunc func(bool, uint16, uint16) ([]TxIdAndSize, error)
-type ReplyTxIdsFunc func(interface{}) error
 type RequestTxsFunc func([]TxId) ([]TxBody, error)
-type ReplyTxsFunc func(interface{}) error
-type DoneFunc func() error
 type InitFunc func() error
 
 func New(protoOptions protocol.ProtocolOptions, cfg *Config) *TxSubmission {
@@ -159,30 +153,12 @@ func WithRequestTxIdsFunc(
 	}
 }
 
-func WithReplyTxIdsFunc(replyTxIdsFunc ReplyTxIdsFunc) TxSubmissionOptionFunc {
-	return func(c *Config) {
-		c.ReplyTxIdsFunc = replyTxIdsFunc
-	}
-}
-
 func WithRequestTxsFunc(requestTxsFunc RequestTxsFunc) TxSubmissionOptionFunc {
 	return func(c *Config) {
 		c.RequestTxsFunc = requestTxsFunc
 	}
 }
 
-func WithReplyTxsFunc(replyTxsFunc ReplyTxsFunc) TxSubmissionOptionFunc {
-	return func(c *Config) {
-		c.ReplyTxsFunc = replyTxsFunc
-	}
-}
-
-func WithDoneFunc(doneFunc DoneFunc) TxSubmissionOptionFunc {
-	return func(c *Config) {
-		c.DoneFunc = doneFunc
-	}
-}
-
 func WithInitFunc(initFunc InitFunc) TxSubmissionOptionFunc {
 	return func(c *Config) {
 		c.InitFunc = initFunc