Clean up block commitment enum and parsing #1978
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Interactive replace using: ```sh fastmod RootHash Commitment fastmod root_hash commitment fastmod root_bytes commitment_bytes git mv zebra-chain/src/block/root_hash.rs zebra-chain/src/block/commitment.rs ``` All replacements were accepted.
This change parses the hash, but does not perform validation.
- change Block::commitment to return a Result rather than an Option - enforce the all-zeroes reserved value consensus rules - change `PreSaplingReserved([u8; 32])` to `PreSaplingReserved` - change `ChainHistoryActivationReserved([u8; 32])` to `ChainHistoryActivationReserved` - update the function comments to describe when each variant is verified
teor2345
added
A-consensus
teor2345
commented
Apr 6, 2021
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@dconnolly already approved these changes as #1958. |
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This PR is a copy of #1958, which has already been approved. But it was merged into the wrong branch.
Motivation
The goal of this PR is to finish the outstanding cleanups on the block commitment field from #881.
After they're done, we can create a good design for its
FinalSaplingRoot,ChainHistoryRoot, andBlockCommitmentsvariants.Solution
Saplingtree roots from other tree rootsNU5BlockCommitmentsHashvariant toblock::CommitmentBlock::commitmentThis PR is based on #1957.
Review
@oxarbitrage is going to work on ZIP-244 and ZIP-221 with me, so he can review this.
Related Issues
Closes #881
Makes some progress on #1874
Follow Up Work
Do a design for #1874, #1567, and #958