LogUpdateRates (uint256 tokenExchangePrice, uint256 liquidityExchangePrice)
[topic 0]:0x9dd85e9767d796973b86c6ccf3a294429cfd5e3e93fa23ac388b9277bb8283fd
0x000000000000000000000000000000000000000000000000000000efb7921401000000000000000000000000000000000000000000000000000000ec7920fbbc