serde.rs

use starknet::{
    core::{
        codec::{Decode, Encode},
        types::Felt,
    },
    macros::felt,
};

#[derive(Debug, Eq, PartialEq, Encode, Decode)]
struct CairoType {
    a: Felt,
    b: Option<u32>,
    c: Vec<bool>,
    d: [u8; 2],
}

fn main() {
    let instance = CairoType {
        a: felt!("123456789"),
        b: Some(100),
        c: vec![false, true],
        d: [3, 4],
    };

    let mut serialized = vec![];
    instance.encode(&mut serialized).unwrap();

    assert_eq!(
        serialized,
        [
            felt!("123456789"),
            felt!("0"),
            felt!("100"),
            felt!("2"),
            felt!("0"),
            felt!("1"),
            felt!("2"),
            felt!("3"),
            felt!("4"),
        ]
    );

    let restored = CairoType::decode(&serialized).unwrap();

    assert_eq!(instance, restored);
}