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// Copyright 2021-2023 Protocol Labs
// Copyright 2019-2022 ChainSafe Systems
// SPDX-License-Identifier: Apache-2.0, MIT

use fvm_ipld_encoding::{BytesDe, BytesSer};
use serde::{Deserialize, Deserializer, Serialize, Serializer};

// TODO: turn this back into a 32byte array once we no longer need go compat. It's a vec so that the
// errors match.
/// String of random bytes usually generated from a randomness beacon or from tickets on chain.
#[derive(PartialEq, Eq, Default, Clone, Debug)]
pub struct Randomness(pub Vec<u8>);

pub const RANDOMNESS_LENGTH: usize = 32;

impl Serialize for Randomness {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        BytesSer(&self.0).serialize(serializer)
    }
}

impl<'de> Deserialize<'de> for Randomness {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        let bytes = BytesDe::deserialize(deserializer)?;
        Ok(Self(bytes.0))
    }
}