Move MakeJoin logic to GMSL (#3081)

clientapi/threepid/invites.go

@@ -64,14 +64,34 @@ type idServerStoreInviteResponse struct {
 }
 
 var (
-	// ErrMissingParameter is the error raised if a request for 3PID invite has
-	// an incomplete body
-	ErrMissingParameter = errors.New("'address', 'id_server' and 'medium' must all be supplied")
-	// ErrNotTrusted is the error raised if an identity server isn't in the list
-	// of trusted servers in the configuration file.
-	ErrNotTrusted = errors.New("untrusted server")
+	errMissingParameter = fmt.Errorf("'address', 'id_server' and 'medium' must all be supplied")
+	errNotTrusted       = fmt.Errorf("untrusted server")
 )
 
+// ErrMissingParameter is the error raised if a request for 3PID invite has
+// an incomplete body
+type ErrMissingParameter struct{}
+
+func (e ErrMissingParameter) Error() string {
+	return errMissingParameter.Error()
+}
+
+func (e ErrMissingParameter) Unwrap() error {
+	return errMissingParameter
+}
+
+// ErrNotTrusted is the error raised if an identity server isn't in the list
+// of trusted servers in the configuration file.
+type ErrNotTrusted struct{}
+
+func (e ErrNotTrusted) Error() string {
+	return errNotTrusted.Error()
+}
+
+func (e ErrNotTrusted) Unwrap() error {
+	return errNotTrusted
+}
+
 // CheckAndProcessInvite analyses the body of an incoming membership request.
 // If the fields relative to a third-party-invite are all supplied, lookups the
 // matching Matrix ID from the given identity server. If no Matrix ID is
@@ -99,7 +119,7 @@ func CheckAndProcessInvite(
 	} else if body.Address == "" || body.IDServer == "" || body.Medium == "" {
 		// If at least one of the 3PID-specific fields is supplied but not all
 		// of them, return an error
-		err = ErrMissingParameter
+		err = ErrMissingParameter{}
 		return
 	}
 

clientapi/threepid/threepid.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/matrix-org/dendrite/setup/config"
 	"github.com/matrix-org/gomatrixserverlib/fclient"
+	"github.com/matrix-org/gomatrixserverlib/spec"
 )
 
 // EmailAssociationRequest represents the request defined at https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-register-email-requesttoken
@@ -133,7 +134,7 @@ func CheckAssociation(
 		return false, "", "", err
 	}
 
-	if respBody.ErrCode == "M_SESSION_NOT_VALIDATED" {
+	if respBody.ErrCode == string(spec.ErrorSessionNotValidated) {
 		return false, "", "", nil
 	} else if len(respBody.ErrCode) > 0 {
 		return false, "", "", errors.New(respBody.Error)
@@ -186,5 +187,5 @@ func isTrusted(idServer string, cfg *config.ClientAPI) error {
 			return nil
 		}
 	}
-	return ErrNotTrusted
+	return ErrNotTrusted{}
 }