PurchaseEvent (uint256 , address , uint256 )
[topic 0]:0xbec109f7ee137de661c6887caa96653c0545050a9908a3b6eb5190440bbec864
[topic 1]:0x000000000000000000000000189473ccefe44384773e237f54ca3c8bc9b6c31d
0x0000000000000000000000000000000000000000000000000280e73416b3880000000000000000000000000000000000000000000000000000000000605c8f90