[{"anonymous": false, "inputs": [{"indexed": true, "internalType": "int256", "name": "_id", "type": "int256"}, {"indexed": true, "internalType": "address", "name": "_to", "type": "address"}], "name": "ProductSale", "type": "event"}, {"inputs": [{"internalType": "int256", "name": "productId", "type": "int256"}], "name": "buy", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "int256", "name": "productId", "type": "int256"}], "name": "getPriceById", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "int256", "name": "productId", "type": "int256"}, {"internalType": "uint256", "name": "price", "type": "uint256"}], "name": "putOnSale", "outputs": [], "stateMutability": "nonpayable", "type": "function"}]