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fix: Update comments for Heartwood's hashChainHistoryRoot

This commit is contained in:
teor 2020-07-27 20:38:21 +10:00 committed by Deirdre Connolly
parent 12cbe410f2
commit 5ece62f0a5
1 changed files with 11 additions and 3 deletions
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14
zebra-chain/src/block/header.rs
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@ -35,9 +35,18 @@ pub struct BlockHeader {
/// header.
pub merkle_root_hash: MerkleTreeRootHash,
/// [Sapling onward] The root LEBS2OSP256(rt) of the Sapling note
/// [Pre-Sapling] Reserved. All zeroes.
/// [Sapling and Blossom] The root LEBS2OSP256(rt) of the Sapling note
/// commitment tree corresponding to the final Sapling treestate of
/// this block.
/// [Heartwood onward] The root of a Merkle Mountain Range tree, which
/// commits to various features of the chain's history, including the
/// Sapling commitment tree. This commitment supports the FlyClient
/// protocol. See ZIP-221 for details.
// TODO:
// - replace with an unspecified HistoryRootHash type?
// Note that the NetworkUpgrade list is in zebra-consensus, so we can't
// parse this field into a HistoryRootHash enum in zebra-chain.
pub final_sapling_root_hash: SaplingNoteTreeRootHash,
/// The block timestamp is a Unix epoch time (UTC) when the miner
@ -52,8 +61,7 @@ pub struct BlockHeader {
/// `ThresholdBits(height)`.
///
/// [Bitcoin-nBits](https://bitcoin.org/en/developer-reference#target-nbits)
// parity-zcash has their own wrapper around u32 for this field, see #572 and:
// https://github.com/paritytech/parity-zcash/blob/master/primitives/src/compact.rs
// See #572 for details.
pub bits: u32,
/// An arbitrary field that miners can change to modify the header