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bmt, file: Extract AsyncHasher to separate package #2097

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merged 3 commits into from
Feb 11, 2020

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@nolash nolash commented Feb 8, 2020

This PR is part of a series of PRs that introduces an interface that allows chaining of components that receive a data stream and generate hashes and intermediate Merkle-Tree chunks. The individual PR steps will be partitioned from #2022 (branch https://github.com/nolash/swarm/tree/filehasher-avenged ) as follows:

  1. Introduce SectionWriter, implement this interface in bmt, make AsyncHasher standalone
  2. Move AsyncHasher to file/hasher (this PR)
  3. Add reference implementation of the Filehasher algorithm
  4. Add implementation of SectionWriter sub-component for hashing intermediate Merkle Tree levels.
  5. Add implementation of SectionWriter component executing the FileHasher algorithm
  6. Add a "splitter" that bridges io.Reader and SectionWriter, and an implementation of SectionWriter component that provides Chunk output.
  7. Add implementation of SectionWriter that provides encryption, along with a test utility SectionWriter implentation of a data cache.
  8. Evaluate and prune bmt.Hasher exports wtr AsyncHasher

This PR does not alter any logic. It merely moves the AsyncHasher object to the file/hasher package, while exporting a few consts and vars in bmt/testutil that are used across the sync and async tests.

@nolash nolash added hashing cleanup code completion, add comments and more labels Feb 8, 2020
@nolash nolash self-assigned this Feb 8, 2020
@nolash nolash requested review from janos and pradovic February 8, 2020 17:35
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@pradovic pradovic left a comment

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LGTM, nice work!

@@ -0,0 +1,13 @@
package testutil
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Add copyright header to all new files.

t.ReportAllocs()
t.ResetTimer()
for i := 0; i < t.N; i++ {
asyncHash(bmtobj, 0, n, wh, idxs, segments)
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Could this benchmark be unexpectedly optimised by compiler as the function result is not used anywhere?

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@janos janos left a comment

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LGTM

@nolash nolash merged commit 11809ce into ethersphere:master Feb 11, 2020
@nolash nolash deleted the extract-asynchasher branch February 11, 2020 11:51
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3 participants