RewardPerBlockChanged (uint256 oldValue, uint256 newValue)
[topic 0]:0x79a5349732f93288abbb68e251c3dfc325bf3ee6fde7786d919155d39733e0f5
0x000000000000000000000000000000000000000000000000000000000001e8480000000000000000000000000000000000000000000000000000000000000000