pragma solidity >=0.6.12; // Author: Louis Holbrook 0826EDA1702D1E87C6E2875121D2E7BB88C2A746 // SPDX-License-Identifier: GPL-3.0-or-later // File-version: 1 interface Writer { function addWriter(address _writer) external returns (bool); function deleteWriter(address _writer) external returns (bool); }