PurchaseEvent (uint256 , address , uint256 )
[topic 0]:0xbec109f7ee137de661c6887caa96653c0545050a9908a3b6eb5190440bbec864
[topic 1]:0x000000000000000000000000a069337e4573d38430d37b6286142ed8ad04b2f9
0x00000000000000000000000000000000000000000000002a5a058fc295ed000000000000000000000000000000000000000000000000000000000000602a7137