130 lines
4.0 KiB
Nim
130 lines
4.0 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2024 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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{.used.}
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# Uncategorized helper functions from the spec
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import
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unittest2,
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random,
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std/[algorithm, macros, tables, sysrand],
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stew/results,
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stint,
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kzg4844/[kzg_abi, kzg_ex],
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ssz_serialization/proofs,
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chronicles,
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../beacon_chain/spec/beacon_time,
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eth/p2p/discoveryv5/[node],
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./consensus_spec/[os_ops, fixtures_utils],
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../beacon_chain/spec/[helpers, eip7594_helpers],
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../beacon_chain/spec/datatypes/[eip7594, deneb]
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from std/sequtils import anyIt, mapIt, toSeq
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from std/strutils import rsplit
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block:
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template sourceDir: string = currentSourcePath.rsplit(DirSep, 1)[0]
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doAssert Kzg.loadTrustedSetup(
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sourceDir &
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"/../vendor/nim-kzg4844/kzg4844/csources/src/trusted_setup.txt", 0).isOk
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const MAX_TOP_BYTE = 114
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proc createSampleKzgBlobs(n: int): seq[KzgBlob] =
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var blob: array[BYTES_PER_BLOB, byte]
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var blobs: seq[KzgBlob]
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for i in 0..<n:
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discard urandom(blob)
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for i in 0..<BYTES_PER_BLOB.int:
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if blob[i] > MAX_TOP_BYTE and i %% kzg_abi.BYTES_PER_FIELD_ELEMENT == 0:
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blob[i] = MAX_TOP_BYTE
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blobs.add(KzgBlob(bytes: blob))
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blobs
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proc chunks[T](lst: seq[T], n: int): seq[seq[T]] =
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## Helper that splits a list into N sized chunks.
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result = @[]
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for i in countup(0, len(lst) - 1, n):
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result.add(lst[i..min(i + n - 1, len(lst) - 1)])
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suite "EIP-7594 Unit Tests":
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test "EIP-7594: Compute Extended Matrix":
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proc testComputeExtendedMatrix() =
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let
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blob_count = 2
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input_blobs = createSampleKzgBlobs(blob_count)
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extended_matrix = compute_extended_matrix(input_blobs)
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doAssert extended_matrix.get.len == kzg_abi.CELLS_PER_EXT_BLOB * blob_count
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let
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chunkSize = kzg_abi.CELLS_PER_EXT_BLOB
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rows = chunks(extended_matrix.get, kzg_abi.CELLS_PER_EXT_BLOB)
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for row in rows:
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doAssert len(row) == kzg_abi.CELLS_PER_EXT_BLOB
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testComputeExtendedMatrix()
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test "EIP:7594: Recover Matrix":
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proc testRecoverMatrix() =
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var rng = initRand(5566)
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# Number of samples we shall be recovering
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const N_SAMPLES = kzg_abi.CELLS_PER_EXT_BLOB div 2
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# Compute an extended matrix with 2 blobs for this test
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let
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blob_count = 2
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blobs = createSampleKzgBlobs(blob_count)
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extended_matrix = compute_extended_matrix(blobs)
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# Construct a matrix with some entries missing
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var partial_matrix: seq[MatrixEntry]
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for blob_entries in chunks(extended_matrix.get, kzg_abi.CELLS_PER_EXT_BLOB):
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var blb_entry = blob_entries
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rng.shuffle(blb_entry)
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partial_matrix.add(blob_entries[0..N_SAMPLES-1])
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# Given the partial matrix, recover the missing entries
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let recovered_matrix = recover_matrix(partial_matrix, blob_count)
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# Ensure that the recovered matrix matches the original matrix
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doAssert recovered_matrix == extended_matrix, "Both matrices don't match!"
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testRecoverMatrix()
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suite "EIP-7594 Sampling Tests":
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test "EIP7594: Extended Sample Count":
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proc testExtendedSampleCount() =
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let samplesPerSlot = 16
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const tests = [
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(0, 16),
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(1, 20),
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(2, 24),
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(3, 27),
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(4, 29),
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(5, 32),
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(6, 35),
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(7, 37),
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(8, 40),
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(9, 42),
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(10, 44),
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(11, 47),
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(12, 49),
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(13, 51),
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(14, 53),
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(15, 55),
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(16, 57),
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(17, 59),
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(18, 61),
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(19, 63),
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(20, 65)
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]
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for (allowed_failures, extendedSampleCount) in tests:
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check: get_extended_sample_count(samplesPerSlot, allowed_failures) == extendedSampleCount
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testExtendedSampleCount()
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