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DebugStep

struct DebugStep {
/// The stack before executing the step of the run.
/// stack\[0\] represents the top of the stack.
/// and only stack data relevant to the opcode execution is contained.
uint256[] stack;
/// The memory input data before executing the step of the run.
/// only input data relevant to the opcode execution is contained.
///
/// e.g. for MLOAD, it will have memory\[offset:offset+32\] copied here.
/// the offset value can be get by the stack data.
bytes memoryInput;
/// The opcode that was accessed.
uint8 opcode;
/// The call depth of the step.
uint64 depth;
/// Whether the call end up with out of gas error.
bool isOutOfGas;
/// The contract address where the opcode is running
address contractAddr;
}

The result of the stopDebugTraceRecording call.