TokensBought (index_topic_1address buyer, uint256 tokenAmount, uint256 currencyAmount)
[topic 0]:0x8442948036198f1146d3a63c3db355d7e0295c2cc5676c755990445da4fdc1c9
0x000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb480000000000000000000000000000000000000000000000001bc16d674ec8000000000000000000000000000000000000000000000000000000000000d4fb8a79