cita-state 0.1.6

//! Package hash_keccak is a function set for implementing Ethereum's state.
use ethereum_types::H256;
use tiny_keccak;

use super::err;

pub const NIL_DATA: H256 = H256([
    0xc5, 0xd2, 0x46, 0x01, 0x86, 0xf7, 0x23, 0x3c, 0x92, 0x7e, 0x7d, 0xb2, 0xdc, 0xc7, 0x03, 0xc0, 0xe5, 0x00, 0xb6,
    0x53, 0xca, 0x82, 0x27, 0x3b, 0x7b, 0xfa, 0xd8, 0x04, 0x5d, 0x85, 0xa4, 0x70,
]);

pub const RLP_NULL: H256 = H256([
    0x56, 0xe8, 0x1f, 0x17, 0x1b, 0xcc, 0x55, 0xa6, 0xff, 0x83, 0x45, 0xe6, 0x92, 0xc0, 0xf8, 0x6e, 0x5b, 0x48, 0xe0,
    0x1b, 0x99, 0x6c, 0xad, 0xc0, 0x01, 0x62, 0x2f, 0xb5, 0xe3, 0x63, 0xb4, 0x21,
]);

pub fn summary(data: &[u8]) -> Vec<u8> {
    tiny_keccak::keccak256(data).to_vec()
}

pub fn encodek(data: &[u8]) -> Vec<u8> {
    summary(data)
}

pub fn encodev<E: rlp::Encodable>(object: &E) -> Vec<u8> {
    rlp::encode(object)
}

pub fn decodev(data: &[u8]) -> Result<Vec<u8>, err::Error> {
    Ok(rlp::decode(&data)?)
}