vaderangry / PhpJsonRpc

        // Single request

        if ($this->isSingleRequest($payload)) {

            if ($this->isValidCall($payload)) {

                $units[] = new CallUnit($payload['id'], $payload['method'], $payload['params'] ?? []);

            } elseif ($this->isValidNotification($payload)) {

                $units[] = new CallNotification($payload['method'], $payload['params']);

            } else {

                $units[] = new CallError(new InvalidRequestException());

            }

            return new CallSpecifier($units, true);

        }

        // Batch request

        foreach ($payload as $record) {

            if ($this->isValidCall($record)) {

                $units[] = new CallUnit($record['id'], $record['method'], $record['params'] ?? []);

            } elseif ($this->isValidNotification($record)) {

                $units[] = new CallNotification($record['method'], $record['params'] ?? []);

            } else {

                $units[] = new CallError(new InvalidRequestException());

            }

        }

        return new CallSpecifier($units, false);