ARCO-207: add prometheus metrics to api

cmd/arc/services/api.go

@@ -19,6 +19,7 @@ import (
 	"github.com/bitcoin-sv/arc/pkg/blocktx"
 	"github.com/bitcoin-sv/arc/pkg/metamorph"
 
+	"github.com/labstack/echo-contrib/echoprometheus"
 	"github.com/labstack/echo/v4"
 	echomiddleware "github.com/labstack/echo/v4/middleware"
 	"github.com/ordishs/go-bitcoin"
@@ -62,6 +63,9 @@ func StartAPIServer(logger *slog.Logger, arcConfig *config.ArcConfig) (func(), e
 		},
 	}))
 
+	// add prometheus metrics
+	e.Use(echoprometheus.NewMiddleware("api"))
+
 	// load the ARC handler from config
 	// If you want to customize this for your own server, see examples dir
 	// check the swagger definition against our requests

go.mod

@@ -92,6 +92,7 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/labstack/echo-contrib v0.17.1 // indirect
 	github.com/labstack/gommon v0.4.2 // indirect
 	github.com/libsv/go-bk v0.1.6 // indirect
 	github.com/libsv/go-bt/v2 v2.2.5 // indirect

go.sum

@@ -190,6 +190,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/labstack/echo-contrib v0.17.1 h1:7I/he7ylVKsDUieaGRZ9XxxTYOjfQwVzHzUYrNykfCU=
+github.com/labstack/echo-contrib v0.17.1/go.mod h1:SnsCZtwHBAZm5uBSAtQtXQHI3wqEA73hvTn0bYMKnZA=
 github.com/labstack/echo/v4 v4.12.0 h1:IKpw49IMryVB2p1a4dzwlhP1O2Tf2E0Ir/450lH+kI0=
 github.com/labstack/echo/v4 v4.12.0/go.mod h1:UP9Cr2DJXbOK3Kr9ONYzNowSh7HP0aG0ShAyycHSJvM=
 github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=

test/docker-compose.yaml

@@ -221,8 +221,10 @@ services:
       - "8011:8011"
       - "9090:9090"
       - "9999:9999"
+      - "2112:2112"
     expose:
       - "9090"
+      - "2112"
     command: [ "./arc", "-api=true", "-config=." ]
     volumes:
       - ./config/config.yaml:/service/config.yaml