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// Copyright (c) The Diem Core Contributors
// SPDX-License-Identifier: Apache-2.0

// Copyright 2021 Conflux Foundation. All rights reserved.
// Conflux is free software and distributed under GNU General Public License.
// See http://www.gnu.org/licenses/

//! This module defines physical storage schema for LedgerInfoWithSignatures
//! structure.
//!
//! Serialized LedgerInfoWithSignatures identified by `epoch`.
//! ```text
//! |<---key--->|<---------------value------------->|
//! | epoch | ledger_info_with_signatures bytes |
//! ```
//!
//! `epoch` is serialized in big endian so that records in RocksDB will be in
//! order of their numeric value.

use super::LEDGER_BLOCK_CF_NAME;
use anyhow::Result;
use consensus_types::block::{Block, BlockUnchecked};
use diem_crypto::hash::HashValue;
use schemadb::{
    define_schema,
    schema::{KeyCodec, ValueCodec},
};

define_schema!(
    LedgerBlockSchema,
    HashValue, /* block id */
    Block,
    LEDGER_BLOCK_CF_NAME
);

impl KeyCodec<LedgerBlockSchema> for HashValue {
    fn encode_key(&self) -> Result<Vec<u8>> { Ok(self.to_vec()) }

    fn decode_key(data: &[u8]) -> Result<Self> {
        Self::from_slice(data).map_err(Into::into)
    }
}

impl ValueCodec<LedgerBlockSchema> for Block {
    fn encode_value(&self) -> Result<Vec<u8>> {
        bcs::to_bytes(self).map_err(Into::into)
    }

    fn decode_value(data: &[u8]) -> Result<Self> {
        bcs::from_bytes::<BlockUnchecked>(data)
            .map(Into::into)
            .map_err(Into::into)
    }
}

#[cfg(test)]
mod test;