docs: Update protocol version to 6

- Increment protocol version in documentation and tests
- Ensure consistency across related test cases

Signed-off-by: Yusuke Shimizu <stm1051212@gmail.com>

Author: YusukeShimizu

docs/peer-protocol.md

@@ -49,7 +49,7 @@ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "S
       - [The `claim_by_csv` path](#the-claim_by_csv-path)
 
 ## General
-The `protocol_version` is included to allow for possible changes in the future. The `protocol_version` of this document is `5`.
+The `protocol_version` is included to allow for possible changes in the future. The `protocol_version` of this document is `6`.
 
 PeerSwap utilizes custom messages as described in [BOLT#1](https://github.com/Lightning/bolts/blob/master/01-messaging.md). The types are in range `42069`-`42085`. The `payload` is JSON encoded.
 

swap/messages_test.go

@@ -2,6 +2,7 @@ package swap
 
 import (
 	"encoding/json"
+	"strconv"
 	"strings"
 	"testing"
 
@@ -12,6 +13,7 @@ import (
 func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 	t.Parallel()
 
+	protocolVersion := strconv.Itoa(PEERSWAP_PROTOCOL_VERSION)
 	swapID := strings.Repeat("00", 32)
 	pubkey := "02" + strings.Repeat("00", 32)
 	intermediaryPubkey := "03" + strings.Repeat("11", 32)
@@ -20,7 +22,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"asset": "",
 			"network": "regtest",
@@ -40,7 +42,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"asset": "",
 			"network": "regtest",
@@ -64,7 +66,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"asset": "",
 			"network": "regtest",
@@ -84,7 +86,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"asset": "",
 			"network": "regtest",
@@ -108,7 +110,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"pubkey": "` + pubkey + `",
 			"premium": 10,
@@ -128,7 +130,7 @@ func TestPeerswapMessages_TwoHopJSONIsOptional(t *testing.T) {
 		t.Parallel()
 
 		raw := `{
-			"protocol_version": 5,
+			"protocol_version": ` + protocolVersion + `,
 			"swap_id": "` + swapID + `",
 			"pubkey": "` + pubkey + `",
 			"Payreq": "lnbc1...",
@@ -167,7 +169,7 @@ func TestPeerswapMessages_TwoHopValidation(t *testing.T) {
 		t.Parallel()
 
 		msg := SwapOutRequestMessage{
-			ProtocolVersion: 5,
+			ProtocolVersion: PEERSWAP_PROTOCOL_VERSION,
 			SwapId:          swapID,
 			Asset:           "",
 			Network:         "regtest",
@@ -185,7 +187,7 @@ func TestPeerswapMessages_TwoHopValidation(t *testing.T) {
 		t.Parallel()
 
 		msg := SwapOutAgreementMessage{
-			ProtocolVersion: 5,
+			ProtocolVersion: PEERSWAP_PROTOCOL_VERSION,
 			SwapId:          swapID,
 			Pubkey:          pubkey,
 			TwoHop: &TwoHop{

swap/service.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	PEERSWAP_PROTOCOL_VERSION = 5
+	PEERSWAP_PROTOCOL_VERSION = 6
 )
 
 var (