fix(BUX-667): display application version in swagger.

cli/flags.go

@@ -10,7 +10,6 @@ import (
 	"github.com/bitcoin-sv/block-headers-service/config"
 	"github.com/bitcoin-sv/block-headers-service/database"
 	"github.com/bitcoin-sv/block-headers-service/logging"
-	"github.com/bitcoin-sv/block-headers-service/version"
 )
 
 type cliFlags struct {
@@ -68,7 +67,7 @@ func parseCliFlags(cli *cliFlags, cfg *config.AppConfig, appFlags *pflag.FlagSet
 	}
 
 	if cli.showVersion {
-		log.Info().Msgf("block headers service version %s", version.String())
+		fmt.Println(config.ApplicationName, config.Version())
 		os.Exit(0)
 	}
 

cmd/main.go

@@ -31,19 +31,22 @@ import (
 	httpserver "github.com/bitcoin-sv/block-headers-service/transports/http/server"
 	"github.com/bitcoin-sv/block-headers-service/transports/p2p"
 	peerpkg "github.com/bitcoin-sv/block-headers-service/transports/p2p/peer"
-	"github.com/bitcoin-sv/block-headers-service/version"
 
 	sqlrepository "github.com/bitcoin-sv/block-headers-service/database/repository"
 )
 
+// version version of the application that can be overridden with ldflags during build
+// (e.g. go build -ldflags "-X main.version=1.2.3").
+var version = "development"
+
 // nolint: godot
 // @securityDefinitions.apikey Bearer
 // @in header
 // @name Authorization
 func main() {
 	defaultLog := logging.GetDefaultLogger()
 
-	if err := config.SetDefaults(defaultLog); err != nil {
+	if err := config.SetDefaults(version, defaultLog); err != nil {
 		defaultLog.Error().Msgf("cannot set config default values: %v", err)
 	}
 
@@ -89,7 +92,7 @@ func main() {
 	wire.SetLimits(config.ExcessiveBlockSize)
 
 	// Show version at startup.
-	log.Info().Msgf("Version %s", version.String())
+	log.Info().Msgf("Version %s", config.Version())
 
 	peers := make(map[*peerpkg.Peer]*peerpkg.PeerSyncState)
 

config/config.go

@@ -11,14 +11,14 @@ import (
 )
 
 const (
-	ApplicationName       = "Block Headers Service"
-	APIVersion            = "v1"
-	Version               = "v0.6.0"
+	ApplicationName       = "block-headers-service"
 	ConfigFilePathKey     = "config_file"
 	DefaultConfigFilePath = "config.yaml"
 	ConfigEnvPrefix       = "bhs"
 )
 
+var version = "should-be-overridden-by-setDefaults"
+
 var Lookup func(string) ([]net.IP, error)
 var Dial func(string, string, time.Duration) (net.Conn, error)
 var Checkpoints []chaincfg.Checkpoint
@@ -32,6 +32,10 @@ const (
 	DBPostgreSql DbEngine = "postgres"
 )
 
+func Version() string {
+	return version
+}
+
 // AppConfig returns strongly typed config values.
 type AppConfig struct {
 	Db         *DbConfig         `mapstructure:"db"`
@@ -119,6 +123,8 @@ type P2PConfig struct {
 	BlocksForForkConfirmation int `mapstructure:"blocks_for_confirmation" description:"Minimum number of blocks to consider a block confirmed"`
 	// DefaultConnectTimeout is the default connection timeout.
 	DefaultConnectTimeout time.Duration `mapstructure:"default_connect_timeout" description:"The default connection timeout"`
+	UserAgentName         string        `mapstructure:"user_agent_name" description:"The name that should be used during announcement of the client on the p2p network"`
+	UserAgentVersion      string        `mapstructure:"user_agent_version" description:"By default will be equal to application version, but can be overridden for development purposes"`
 }
 
 // LoggingConfig represents a logging config.

config/defaults.go

@@ -65,14 +65,16 @@ func getP2PDefaults() *P2PConfig {
 		BlocksForForkConfirmation: 10,
 		DefaultConnectTimeout:     30 * time.Second,
 		DisableCheckpoints:        false,
+		UserAgentName:             ApplicationName,
+		UserAgentVersion:          Version(),
 	}
 }
 
 func getLoggingDefaults() *LoggingConfig {
 	return &LoggingConfig{
 		Level:        "debug",
 		Format:       "console",
-		InstanceName: "block-headers-service",
+		InstanceName: ApplicationName,
 		LogOrigin:    true,
 	}
 }

config/load.go

@@ -3,14 +3,13 @@ package config
 import (
 	"fmt"
 	"net"
+	"os"
 	"strings"
 	"sync"
 
 	"github.com/bitcoin-sv/block-headers-service/logging"
 	"github.com/rs/zerolog"
 
-	"os"
-
 	"github.com/mitchellh/mapstructure"
 	"github.com/spf13/viper"
 )
@@ -40,9 +39,11 @@ func Load(cfg *AppConfig) (*AppConfig, *zerolog.Logger, error) {
 	return cfg, logger, nil
 }
 
-func SetDefaults(log *zerolog.Logger) error {
+func SetDefaults(defaultVersion string, log *zerolog.Logger) error {
+	viperLock.Lock()
+	defer viperLock.Unlock()
 	viper.SetDefault(ConfigFilePathKey, DefaultConfigFilePath)
-
+	version = defaultVersion
 	defaultsMap := make(map[string]interface{})
 	if err := mapstructure.Decode(GetDefaultAppConfig(), &defaultsMap); err != nil {
 		return err

internal/tests/testapp/test_bhs.go

@@ -70,7 +70,7 @@ func NewTestBlockHeaderService(t *testing.T, ops ...bhsOpt) (*TestBlockHeaderSer
 
 	viper.Reset()
 	testLog := zerolog.Nop()
-	if err := config.SetDefaults(&testLog); err != nil {
+	if err := config.SetDefaults("unittest", &testLog); err != nil {
 		panic(fmt.Sprintf("cannot set config default values: %v", err))
 	}
 	defaultConfig := config.GetDefaultAppConfig()

transports/http/endpoints/swagger/endpoints.go

@@ -1,6 +1,7 @@
 package swagger
 
 import (
+	"github.com/bitcoin-sv/block-headers-service/config"
 	"github.com/bitcoin-sv/block-headers-service/docs"
 	"github.com/bitcoin-sv/block-headers-service/service"
 	router "github.com/bitcoin-sv/block-headers-service/transports/http/endpoints/routes"
@@ -10,9 +11,10 @@ import (
 )
 
 // NewHandler creates new endpoint handler.
-func NewHandler(s *service.Services, apiUrlPrefix string) router.RootEndpoints {
+func NewHandler(_ *service.Services, apiUrlPrefix string) router.RootEndpoints {
 	return router.RootEndpointsFunc(func(router *gin.RouterGroup) {
 		docs.SwaggerInfo.BasePath = apiUrlPrefix
+		docs.SwaggerInfo.Version = config.Version()
 		router.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerfiles.Handler))
 	})
 }

transports/p2p/server.go

@@ -46,15 +46,6 @@ const (
 	// retries when connecting to persistent peers.  It is adjusted by the
 	// number of retries such that there is a retry backoff.
 	connectionRetryInterval = time.Second * 5
-
-	// userAgentName is the user agent name and is used to help identify
-	// ourselves to other bitcoin peers.
-	userAgentName = "/block-headers-service"
-
-	// userAgentVersion is the user agent version and is used to help
-	// identify ourselves to other bitcoin peers.
-	// userAgentVersion = fmt.Sprintf("%d.%d.%d", version.AppMajor, version.AppMinor, version.AppPatch).
-	userAgentVersion = "0.3.0"
 )
 
 // ServerAlreadyStarted represents starting error when a p2p server is already started.
@@ -191,9 +182,9 @@ func (ps *peerState) forAllPeers(closure func(sp *serverPeer)) {
 // server provides a bitcoin server for handling communications to and from
 // bitcoin peers.
 type server struct {
-	started       int32
-	shutdown      int32
-	startupTime   int64
+	started     int32
+	shutdown    int32
+	startupTime int64
 
 	chainParams          *chaincfg.Params
 	addrManager          *addrmgr.AddrManager
@@ -882,8 +873,8 @@ func newPeerConfig(sp *serverPeer) *peer.Config {
 		AddrMe:            addrMe,
 		NewestBlock:       sp.newestBlock,
 		HostToNetAddress:  sp.server.addrManager.HostToNetAddress,
-		UserAgentName:     userAgentName,
-		UserAgentVersion:  userAgentVersion,
+		UserAgentName:     sp.server.p2pConfig.UserAgentName,
+		UserAgentVersion:  sp.server.p2pConfig.UserAgentVersion,
 		UserAgentComments: initUserAgentComments(config.ExcessiveBlockSize),
 		ChainParams:       sp.server.chainParams,
 		Services:          sp.server.wireServices,