// SPDX-License-Identifier: CC0-1.0

//! Bitcoin blocks.
//!
//! A block is a bundle of transactions with a proof-of-work attached,
//! which commits to an earlier block to form the blockchain. This
//! module describes structures and functions needed to describe
//! these blocks and the blockchain.

use hashes::sha256d;

hashes::hash_newtype! {
    /// A bitcoin block hash.
    pub struct BlockHash(sha256d::Hash);
    /// A hash corresponding to the witness structure commitment in the coinbase transaction.
    pub struct WitnessCommitment(sha256d::Hash);
}

impl BlockHash {
    /// Dummy hash used as the previous blockhash of the genesis block.
    pub const GENESIS_PREVIOUS_BLOCK_HASH: Self = Self::from_byte_array([0; 32]);
}