158c09ca8c
Gate the withdrawal sweep optimization (using min of validator count and MaxValidatorsPerWithdrawalsSweep) behind a hidden feature flag that defaults to false. Enable the flag for spectests to match consensus spec. The backported changes were from [4788](https://github.com/ethereum/consensus-specs/pull/4788) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Spec Tests
Spec testing vectors: https://github.com/ethereum/consensus-spec-tests
To run all spectests:
bazel test //... --test_tag_filters=spectest
Adding new tests
New tests must adhere to the following filename convention:
{mainnet/minimal/general}/$fork__$package__$test_test.go
An example test is the phase0 epoch processing test for effective balance updates. This test has a spectest path of {mainnet, minimal}/phase0/epoch_processing/effective_balance_updates/pyspec_tests.
There are tests for mainnet and minimal config, so for each config we will add a file by the name of phase0__epoch_processing__effective_balance_updates_test.go since the fork is phase0, the package is epoch_processing, and the test is effective_balance_updates.
Running nightly spectests
Since PR 15312, Prysm has support to download "nightly" spectests from github via a starlark rule configuration by environment variable.
Set --repo_env=CONSENSUS_SPEC_TESTS_VERSION=nightly when running spectest to download the "nightly" spectests.
Note: A GITHUB_TOKEN environment variable is required to be set. The github token must be a fine grained token.
bazel test //... --test_tag_filters=spectest --repo_env=CONSENSUS_SPEC_TESTS_VERSION=nightly