new x/errors package to handle HTTP wire errors

x/errors/aliases.go

@@ -0,0 +1,25 @@
+package errors
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	// Is is an alias of the standard errors.Is function.
+	Is = errors.Is
+	// As is an alias of the standard errors.As function.
+	As = errors.As
+	// New is an alias of the standard errors.New function.
+	New = errors.New
+	// Unwrap is an alias of the standard errors.Unwrap function.
+	Unwrap = errors.Unwrap
+)
+
+func sprintf(format string, args ...interface{}) string {
+	if len(args) > 0 {
+		return fmt.Sprintf(format, args...)
+	}
+
+	return format
+}