Please keep in mind that like all events this is only emitted for successful
calls. This is because on failure all storage changes including events are
rolled back.
Type declaration
code_hash: FixedSizeBinary<32>
The code hash that was delegate called.
contract: FixedSizeBinary<20>
The contract that performed the delegate call and hence in whose context
the code_hash is executed.
A contract delegate called a code hash.
Note
Please keep in mind that like all events this is only emitted for successful calls. This is because on failure all storage changes including events are rolled back.