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use crate::schema::{ensure_slice_len_eq, TRANSACTION_ACCUMULATOR_CF_NAME};
use anyhow::Result;
use byteorder::{BigEndian, ReadBytesExt};
use diem_crypto::HashValue;
use diem_types::proof::position::Position;
use schemadb::{
define_schema,
schema::{KeyCodec, ValueCodec},
};
use std::mem::size_of;
define_schema!(
TransactionAccumulatorSchema,
Position,
HashValue,
TRANSACTION_ACCUMULATOR_CF_NAME
);
impl KeyCodec<TransactionAccumulatorSchema> for Position {
fn encode_key(&self) -> Result<Vec<u8>> {
Ok(self.to_postorder_index().to_be_bytes().to_vec())
}
fn decode_key(mut data: &[u8]) -> Result<Self> {
ensure_slice_len_eq(data, size_of::<u64>())?;
let index = data.read_u64::<BigEndian>()?;
Position::from_postorder_index(index)
}
}
impl ValueCodec<TransactionAccumulatorSchema> for HashValue {
fn encode_value(&self) -> Result<Vec<u8>> {
Ok(self.to_vec())
}
fn decode_value(data: &[u8]) -> Result<Self> {
Self::from_slice(data).map_err(Into::into)
}
}
#[cfg(test)]
mod test;