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6bd6bae86c
Since these types were written, we've gained an executable spec: https://github.com/ethereum/execution-specs This PR aligns some of the types we use with this spec to simplify comparisons and cross-referencing. Using a `distinct` type is a tradeoff between nim ergonomics, type safety and the ability to work around nim quirks and stdlib weaknesses. In particular, it allows us to overload common functions such as `hash` with correct and performant versions as well as maintain control over string conversions etc at the cost of a little bit of ceremony when instantiating them. Apart from distinct byte types, `Hash32`, is introduced in lieu of the existing `Hash256`, again aligning this commonly used type with the spec which picks bytes rather than bits in the name.
22 lines
638 B
Nim
22 lines
638 B
Nim
import
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../common/hashes_rlp
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export hashes_rlp
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type
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TrieError* = object of CatchableError
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# A common base type of all Trie errors.
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PersistenceFailure* = object of TrieError
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# The backing database of the trie was not able to carry out
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# the storage or retrieval request.
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CorruptedTrieDatabase* = object of Defect
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# We consider this a Defect, because the software cannot safely
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# operate if its database has been tampered with. A swift crash
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# will be a more appropriate response.
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const
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emptyRlp* = @[128.byte]
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emptyRlpHash* = hash32"56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
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