nimbus-eth2/tests/official/altair/test_fixture_merkle_single_...

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# beacon_chain
# Copyright (c) 2021 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.used.}
import
# Standard library
std/[os, sequtils, streams],
# Status libraries
stew/bitops2,
# Third-party
yaml,
# Beacon chain internals
../../../beacon_chain/spec/datatypes/altair,
../../../beacon_chain/spec/helpers,
# Test utilities
../../testutil,
../fixtures_utils
const TestsDir =
SszTestsDir/const_preset/"altair"/"merkle"/"single_proof"/"pyspec_tests"
proc runTest(identifier: string) =
# We wrap the tests in a proc to avoid running out of globals
# in the future: Nim supports up to 3500 globals
# but unittest with the macro/templates put everything as globals
# https://github.com/nim-lang/Nim/issues/12084#issue-486866402
let testDir = TestsDir / identifier
proc `testImpl _ merkle_single_proof _ identifier`() =
test identifier:
type
TestProof = object
leaf: string
leaf_index: GeneralizedIndex
branch: seq[string]
let
proof = block:
var s = openFileStream(testDir/"proof.yaml")
defer: close(s)
var res: TestProof
yaml.load(s, res)
res
state = newClone(parseTest(testDir/"state.ssz_snappy", SSZ,
altair.BeaconState))
var computedProof = newSeq[Eth2Digest](log2trunc(proof.leaf_index))
build_proof(state[], proof.leaf_index, computedProof)
check:
computedProof == proof.branch.mapIt(Eth2Digest.fromHex(it))
is_valid_merkle_branch(Eth2Digest.fromHex(proof.leaf), computedProof,
log2trunc(proof.leaf_index),
get_subtree_index(proof.leaf_index),
hash_tree_root(state[]))
`testImpl _ merkle_single_proof _ identifier`()
suite "Ethereum Foundation - Altair - Merkle - Single proof" & preset():
for kind, path in walkDir(TestsDir, relative = true, checkDir = true):
runTest(path)