diff --git a/pkg/codec/errors.go b/pkg/codec/errors.go
index f3736e65bbcf639dd610f92b12f17e16a98f76af..5efd2313a3b49bef61151426170da3dcf5ac596d 100644
--- a/pkg/codec/errors.go
+++ b/pkg/codec/errors.go
@@ -7,20 +7,22 @@ import (
 	"github.com/go-faster/jx"
 )
 
-// HTTPError is returned by client operations when the HTTP status code of the
-// response is not a 2xx status.
-type HTTPError struct {
-	StatusCode int
-	Status     string
-	Body       []byte
-}
+// Error types defined below are the built-in JSON-RPC errors.
 
-func (err HTTPError) Error() string {
-	if len(err.Body) == 0 {
-		return err.Status
-	}
-	return fmt.Sprintf("%v: %s", err.Status, err.Body)
-}
+var (
+	_ Error = new(ErrorMethodNotFound)
+	_ Error = new(ErrorSubscriptionNotFound)
+	_ Error = new(ErrorParse)
+	_ Error = new(ErrorInvalidRequest)
+	_ Error = new(ErrorInvalidMessage)
+	_ Error = new(ErrorInvalidParams)
+)
+
+const (
+	ErrorCodeDefault     = -32000
+	ErrorCodeApplication = -32080
+	ErrorCodeJrpc        = -42000
+)
 
 // Error wraps RPC errors, which contain an error code in addition to the message.
 type Error interface {
@@ -88,27 +90,9 @@ func MakeJrpcErr(s string) error {
 	return fmt.Errorf("%w: %s", &JrpcErr{}, s)
 }
 
-// Error types defined below are the built-in JSON-RPC errors.
-
-var (
-	_ Error = new(ErrorMethodNotFound)
-	_ Error = new(ErrorSubscriptionNotFound)
-	_ Error = new(ErrorParse)
-	_ Error = new(ErrorInvalidRequest)
-	_ Error = new(ErrorInvalidMessage)
-	_ Error = new(ErrorInvalidParams)
-)
-
-const ErrorCodeDefault = -32000
-
-const ErrorCodeApplication = -32080
-
-const ErrorCodeJrpc = -42000
-
 type ErrorMethodNotFound struct{ method string }
 
 func (e *ErrorMethodNotFound) ErrorCode() int { return -32601 }
-
 func (e *ErrorMethodNotFound) Error() string {
 	return fmt.Sprintf("the method %s does not exist/is not available", e.method)
 }
@@ -122,7 +106,6 @@ func NewMethodNotFoundError(method string) *ErrorMethodNotFound {
 type ErrorSubscriptionNotFound struct{ namespace, subscription string }
 
 func (e *ErrorSubscriptionNotFound) ErrorCode() int { return -32601 }
-
 func (e *ErrorSubscriptionNotFound) Error() string {
 	return fmt.Sprintf("no %q subscription in %s namespace", e.subscription, e.namespace)
 }
@@ -131,38 +114,45 @@ func (e *ErrorSubscriptionNotFound) Error() string {
 type ErrorParse struct{ message string }
 
 func (e *ErrorParse) ErrorCode() int { return -32700 }
-
-func (e *ErrorParse) Error() string { return e.message }
+func (e *ErrorParse) Error() string  { return e.message }
 
 func NewInvalidRequestError(message string) *ErrorInvalidRequest {
-	return &ErrorInvalidRequest{
-		message: message,
-	}
+	return &ErrorInvalidRequest{message: message}
 }
 
 // received message isn't a valid request
 type ErrorInvalidRequest struct{ message string }
 
 func (e *ErrorInvalidRequest) ErrorCode() int { return -32600 }
-
-func (e *ErrorInvalidRequest) Error() string { return e.message }
+func (e *ErrorInvalidRequest) Error() string  { return e.message }
 
 // received message is invalid
 type ErrorInvalidMessage struct{ message string }
 
 func (e *ErrorInvalidMessage) ErrorCode() int { return -32700 }
-
-func (e *ErrorInvalidMessage) Error() string { return e.message }
+func (e *ErrorInvalidMessage) Error() string  { return e.message }
 
 func NewInvalidParamsError(message string) *ErrorInvalidParams {
-	return &ErrorInvalidParams{
-		message: message,
-	}
+	return &ErrorInvalidParams{message: message}
 }
 
 // unable to decode supplied params, or an invalid number of parameters
 type ErrorInvalidParams struct{ message string }
 
 func (e *ErrorInvalidParams) ErrorCode() int { return -32602 }
+func (e *ErrorInvalidParams) Error() string  { return e.message }
 
-func (e *ErrorInvalidParams) Error() string { return e.message }
+// HTTPError is returned by client operations when the HTTP status code of the
+// response is not a 2xx status.
+type HTTPError struct {
+	StatusCode int
+	Status     string
+	Body       []byte
+}
+
+func (err HTTPError) Error() string {
+	if len(err.Body) == 0 {
+		return err.Status
+	}
+	return fmt.Sprintf("%v: %s", err.Status, err.Body)
+}