[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_writer","type":"address"}],"name":"WriterAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_writer","type":"address"}],"name":"WriterDeleted","type":"event"},{"inputs":[{"internalType":"address","name":"_writer","type":"address"}],"name":"addWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_writer","type":"address"}],"name":"deleteWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_writer","type":"address"}],"name":"isWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]