For some reason, Anchor doesn't let you create weird-sized arrays in #[account]-derived structs. This crate fixes that by providing a macro that generates a serializable struct with an array of any size, that actually shows up in your IDL.
```rs use anchor_cereal::array::*;
...
// Define a struct to wrap your array - it must:
// - derive Clone, AnchorSerializeArray, and AnchorDeserializeArray
// - contain a single field named value, which is an array.
pub struct BigData { value: [u8; 50] }
// You can then use your struct in accounts...
pub struct MyAccount { data: BigData }
...
// ...and instructions.
pub fn initialize(
ctx: Context
my_account.data = data;
// BigData gets implementations for Deref and DerefMut via the deserialize
// trait, so you don't have to reference the inner value in order to use
// the array.
let first = myaccount.data[0];
myaccount.data[1] = 2;
// Same as:
// let first = myaccount.data.value[0];
// myaccount.data.value[1] = 2;
...
Ok(()) } ```