PurchaseEvent (uint256 , address , uint256 )
[topic 0]:0xbec109f7ee137de661c6887caa96653c0545050a9908a3b6eb5190440bbec864
[topic 1]:0x0000000000000000000000007681ed0bbbcd36b55d98d911f97ccc0ad2eb2174
0x00000000000000000000000000000000000000000000000411aaa7385a5f38f0000000000000000000000000000000000000000000000000000000006092a757