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- What are event topics? 1 answer
When we invoke an event as follows :
event MyEvent(uint256 indexed _id, bytes32 _action, bytes32 _player, bytes32 _actionState, address _owner); emit MyEvent(uint256(_public_id), bytes32(_action), bytes32(_player), bytes32(_actionState), _owner);
EtherScan, we see an output as follows :
Topics  0x22b8025a23f25c3f52cdbc1f53a831dbd4e3b4aaeebe121d36c858abea974bc7 mean ?
In case of
 0x0000000000000000000000000000000000000000000000000000000000000001 means
_public_id = 1
However, I do not know
0x22b8025a23f25c3f52cdbc1f53a831dbd4e3b4aaeebe121d36c858abea974bc7 comes from where ? and in general, the term of
Topics what does it mean ?