How can I have a fixed size array in my ink smart contract storage?


    // Contract storage
    pub struct MyContract {
        myArray: [u8; 64]

I get "the trait StorageLayout is not implemented for [u8; 64]" as the error during compilation.

I don't want to use a Vec<u8> as I would have to do size checks all over the place to ensure it's consistently 64 elements long.

1 Answer 1


Resolved via an issue raised on the (ink github)[https://github.com/paritytech/ink/pull/1787]. This will be available in releases post ink v4.2.

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