daemon: implement send and receive

Currently we have this problem

2024-03-26T22:35:58.902Z DEBUG   hsmd: Client: Received message 1 from client
2024-03-26T22:35:58.903Z DEBUG   0387d3a40b5eca0058753afa0ed3ee1b3e34ea5203a72f3b42b35b24d4eae421e5-connectd: Connect IN
2024-03-26T22:35:58.903Z 0387d3a40b5eca0058753afa0ed3ee1b3e34ea5203a72f3b42b35b24d4eae421e5-connectd: [OUT] 001000021100000708a0000a8a5961012006226e46111a0b59caaf126043eb5bbf28c34f3a5e332a1fc7b2b73cf188910f0307017f000001e9b4
2024-03-26T22:35:58.905Z 0387d3a40b5eca0058753afa0ed3ee1b3e34ea5203a72f3b42b35b24d4eae421e5-connectd: [IN] 001000021100000708a0000a8a5961
2024-03-26T22:35:58.905Z DEBUG   0387d3a40b5eca0058753afa0ed3ee1b3e34ea5203a72f3b42b35b24d4eae421e5-lightningd: peer_disconnect_done
2024-03-26T22:35:58.905Z DEBUG   0387d3a40b5eca0058753afa0ed3ee1b3e34ea5203a72f3b42b35b24d4eae421e5-lightningd: Not reconnecting: no active channel

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

go.mod

@@ -4,13 +4,14 @@ go 1.22
 
 require (
 	github.com/akamensky/argparse v1.4.0
+	github.com/btcsuite/btcd v0.23.1
 	github.com/btcsuite/btcd/btcec/v2 v2.2.0
 	github.com/lightningnetwork/lnd v0.15.0-beta
+	github.com/sourcegraph/jsonrpc2 v0.2.0
 )
 
 require (
 	github.com/aead/siphash v1.0.1 // indirect
-	github.com/btcsuite/btcd v0.23.1 // indirect
 	github.com/btcsuite/btcd/btcutil v1.1.1 // indirect
 	github.com/btcsuite/btcd/btcutil/psbt v1.1.4 // indirect
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
@@ -37,7 +38,6 @@ require (
 	github.com/lightningnetwork/lnd/tlv v1.0.3 // indirect
 	github.com/lightningnetwork/lnd/tor v1.0.1 // indirect
 	github.com/miekg/dns v1.1.43 // indirect
-	github.com/sourcegraph/jsonrpc2 v0.2.0 // indirect
 	github.com/stretchr/testify v1.8.4 // indirect
 	golang.org/x/crypto v0.21.0 // indirect
 	golang.org/x/net v0.21.0 // indirect

lnprototest/server.go

@@ -50,16 +50,15 @@ func Make() (*ProtoTestServer, error) {
 // / Connect - Perform the connection with the peer with
 // / the provided public key (aka nodeId) that it is listening
 // / on the specified port.
-func (self *ProtoTestServer) Connect(nodeId string, port uint32, network wire.BitcoinNet) error {
+func (self *ProtoTestServer) Connect(nodeId string, port uint32, network wire.BitcoinNet) (*bytes.Buffer, error) {
 	pubkey, err := StringToPubKey(nodeId)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	hostname := fmt.Sprintf("127.0.0.1:%d", port)
-	fmt.Printf("\n*******%s******\n", hostname)
 	addr, err := net.ResolveTCPAddr("tcp", hostname)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	wireaddr := lnwire.NetAddress{
 		Address:     addr,
@@ -68,21 +67,35 @@ func (self *ProtoTestServer) Connect(nodeId string, port uint32, network wire.Bi
 	}
 	conn, err := brontide.Dial(&self.PrivKeyECDH, &wireaddr, time.Second*3, net.DialTimeout)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	self.Conn = conn
-	return nil
+	if err := self.Conn.SetDeadline(time.Now().Add(time.Second)); err != nil {
+		return nil, err
+	}
+	return self.Receive()
 }
 
 // / Send - Send an message to the connection
 func (self *ProtoTestServer) Send(buff *bytes.Buffer) error {
+	size, err := self.Conn.Write(buff.Bytes())
+	if err != nil {
+		return err
+	}
+	if size == 0 {
+		return fmt.Errorf("No message to flush")
+	}
 	return nil
 }
 
 // / Send - Wait a message from the connection, usually this is
 // / an answer from a previous send message
 func (self *ProtoTestServer) Receive() (*bytes.Buffer, error) {
-	return nil, nil
+	buff, err := self.Conn.ReadNextMessage()
+	if err != nil {
+		return nil, err
+	}
+	return bytes.NewBuffer(buff), nil
 }
 
 // / Destroy - Stop the connecto for lnprototest

server/rpc.go

@@ -14,6 +14,9 @@ import (
 type ConnectRPC struct {
 	NodeId string
 	Port   uint32
+	// Afeter the connection we should have a
+	// init message from the node
+	Msg string
 }
 
 func ConnectCall(request *json.RawMessage, response *json.RawMessage) error {
@@ -22,10 +25,15 @@ func ConnectCall(request *json.RawMessage, response *json.RawMessage) error {
 	if err := json.Unmarshal(*request, &connect); err != nil {
 		return nil
 	}
-	if err := lnprototestServer.Connect(connect.NodeId, connect.Port, wire.SimNet); err != nil {
+	resp, err := lnprototestServer.Connect(connect.NodeId, connect.Port, wire.SimNet)
+	if err != nil {
+		return err
+	}
+	connect.Msg = hex.EncodeToString(resp.Bytes())
+	*response, err = json.Marshal(connect)
+	if err != nil {
 		return err
 	}
-	*response = *request
 	return nil
 }