refactor: use echo ctx only for cancellation/propagation

cmd/service/api.go

@@ -29,12 +29,6 @@ func initApiServer(custodialContainer *custodial.Custodial) *echo.Echo {
 	}
 	server.HTTPErrorHandler = customHTTPErrorHandler
 
-	server.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
-		return func(c echo.Context) error {
-			c.Set("cu", custodialContainer)
-			return next(c)
-		}
-	})
 	server.Use(middleware.Recover())
 	server.Use(middleware.BodyLimit("1M"))
 	server.Use(middleware.ContextTimeout(contextTimeout))
@@ -48,10 +42,10 @@ func initApiServer(custodialContainer *custodial.Custodial) *echo.Echo {
 
 	apiRoute := server.Group("/api", systemGlobalLock)
 
-	apiRoute.POST("/account/create", api.HandleAccountCreate)
-	apiRoute.GET("/account/status/:address", api.HandleNetworkAccountStatus)
-	apiRoute.POST("/sign/transfer", api.HandleSignTransfer)
-	apiRoute.GET("/track/:trackingId", api.HandleTrackTx)
+	apiRoute.POST("/account/create", api.HandleAccountCreate(custodialContainer))
+	apiRoute.GET("/account/status/:address", api.HandleNetworkAccountStatus(custodialContainer))
+	apiRoute.POST("/sign/transfer", api.HandleSignTransfer(custodialContainer))
+	apiRoute.GET("/track/:trackingId", api.HandleTrackTx(custodialContainer))
 
 	return server
 }

internal/api/account.go

@@ -15,11 +15,8 @@ import (
 // CreateAccountHandler route.
 // POST: /api/account/create
 // Returns the public key.
-func HandleAccountCreate(c echo.Context) error {
-	var (
-		cu = c.Get("cu").(*custodial.Custodial)
-	)
-
+func HandleAccountCreate(cu *custodial.Custodial) func(echo.Context) error {
+	return func(c echo.Context) error {
 		generatedKeyPair, err := keypair.Generate()
 		if err != nil {
 			return err
@@ -61,3 +58,4 @@ func HandleAccountCreate(c echo.Context) error {
 			},
 		})
 	}
+}

internal/api/network.go

@@ -11,9 +11,9 @@ import (
 	"github.com/labstack/echo/v4"
 )
 
-func HandleNetworkAccountStatus(c echo.Context) error {
+func HandleNetworkAccountStatus(cu *custodial.Custodial) func(echo.Context) error {
+	return func(c echo.Context) error {
 		var (
-		cu                   = c.Get("cu").(*custodial.Custodial)
 			accountStatusRequest struct {
 				Address string `param:"address" validate:"required,eth_addr_checksum"`
 			}
@@ -49,3 +49,4 @@ func HandleNetworkAccountStatus(c echo.Context) error {
 			},
 		})
 	}
+}

internal/api/sign.go

@@ -21,9 +21,9 @@ import (
 // amount -> int (6 d.p. precision)
 // e.g. 1000000 = 1 VOUCHER
 // Returns the task id.
-func HandleSignTransfer(c echo.Context) error {
+func HandleSignTransfer(cu *custodial.Custodial) func(echo.Context) error {
+	return func(c echo.Context) error {
 		var (
-		cu  = c.Get("cu").(*custodial.Custodial)
 			req struct {
 				From           string `json:"from" validate:"required,eth_addr_checksum"`
 				To             string `json:"to" validate:"required,eth_addr_checksum"`
@@ -96,3 +96,4 @@ func HandleSignTransfer(c echo.Context) error {
 			},
 		})
 	}
+}

internal/api/track.go

@@ -12,9 +12,9 @@ import (
 // Route param:
 // trackingId -> tracking UUID
 // Returns array of tx status.
-func HandleTrackTx(c echo.Context) error {
+func HandleTrackTx(cu *custodial.Custodial) func(echo.Context) error {
+	return func(c echo.Context) error {
 		var (
-		cu              = c.Get("cu").(*custodial.Custodial)
 			txStatusRequest struct {
 				TrackingId string `param:"trackingId" validate:"required,uuid"`
 			}
@@ -40,3 +40,4 @@ func HandleTrackTx(c echo.Context) error {
 			},
 		})
 	}
+}