RewardRateUpdated (uint256 oldRate, uint256 newRate)
[topic 0]:0xc390a98ace15a7bb6bab611eedfdbb2685043b241a869420043cdfb23ccfee50
0x0000000000000000000000000000000000000000000000000094b4a6e2f6be5400000000000000000000000000000000000000000000000000015a1422a526ac