Encode a struct with solidity

Question

Is it possible to encode a struct in Solidity without serializing each variable separately?

Something like:

struct MyStruct {
   uint x;
   uint y;
}

MyStruct storage myStruct = MyStruct({
   x: 11,
   y: 12
});

bytes memory data = abi.encode(myStruct, (MyStruct));

Or in assembly?

Answer 1

If you just want to store this on your contract, solidity structs are already stored encoded in storage.

Just define a data member as struct and assign values, it will be properly encoded.

In case you want to send this as a function parameter, you can just pass the struct (if that's the input type) and it will also be encoded properly.

Answer 2

The correct way to encode a struct is to spread it out while encoding.

I.e.:

abi.encode(MyStruct.x, MyStruct.y);

Make sure to pass the parameters in the right order so that you get the right values when you're retrieving the data off-chain and decoding it.