Adapts XCM remote account derivation to match Polkadot suggestions#2344
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Adapts XCM remote account derivation to match Polkadot suggestions#2344
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librelois
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B7-runtimenoteworthy
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HashedDescription<AccountId, DescribeFamily<DescribeAllTerminal>>
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Coverage generated "Tue Jun 13 19:35:08 UTC 2023": Master coverage: 71.22% |
crystalin
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Jun 13, 2023
This reverts commit d03852f.
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HashedDescription<AccountId, DescribeFamily<DescribeAllTerminal>>
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D1-audited👍
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What does it do?
The intial goal of this PR was to cherry pick paritytech/polkadot#7329 on our polkadot fork and replace our custom non-standard hash derivation by the new type
HashedDescription<AccountId, DescribeFamily<DescribeAllTerminal>>.The problem is that it's not possible to cherry-pick paritytech/polkadot#7329 directly without performing a complete dependency upgrade. To get around this problem, I've manually rewritten just the part we're interested in: I've created a new type named
HashedDescriptionDescribeFamilyAllTerminalthat converts xcm multilocations into local accountId in the same way asHashedDescription<AccountId, DescribeFamily<DescribeAllTerminal>>does with the new traits.To guarantee this equivalence, I wrote a rust test on our polkadot fork based on the master upstream branch: paritytech/polkadot@0679f2b.
Then I copied this test to our polkadot branch
moonbeam-polkadot-v0.9.40: paritytech/polkadot@89fd916#diff-b210cb75f8786021ba64cb7a2377778668ce90a2c306f6a1a1b822a2bba61cfaR590The
DescendOrigininstruction now derives accounts in a different way:new behavior:
blake2_256("SiblingChain" | paraId | "AccountKey20" | address)old behavior:
blake2_256("multiloc" | multilocation)What important points reviewers should know?
Is there something left for follow-up PRs?
What alternative implementations were considered?
Are there relevant PRs or issues in other repositories (Substrate, Polkadot, Frontier, Cumulus)?
What value does it bring to the blockchain users?