test(networking): add codec test vectors for varint, gossip topics, and message IDs#608
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tcoratger merged 1 commit intoleanEthereum:mainfrom Apr 14, 2026
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…nd message IDs Introduces a NetworkingCodecTest fixture that generates JSON test vectors for networking wire-format codecs. Client teams can consume these to validate their implementations against the reference encoding. Three codecs are covered in this first phase: - Varint (LEB128): 15 vectors covering single-byte through 10-byte (2^64-1) boundary values - Gossip topic strings: 8 vectors covering block, aggregation, and attestation subnet topics with fork digest edge cases - Gossip message ID: 8 vectors covering valid/invalid snappy domains, empty inputs, and domain differentiation Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
NetworkingCodecTestfixture: extensible fixture class for networking wire-format conformance testing, using acodec_namediscriminator to dispatch to codec-specific handlersThese are the first networking-layer test vectors. The fixture infrastructure is extensible — adding gossipsub RPC encoding, discovery v5 codecs, or ENR encoding in future PRs only requires a new
codec_namehandler and test file.Test plan
uvx tox -e all-checkspasses (ruff, format, ty, codespell, mdformat)uv run fill --fork=devnet --clean -n auto -- tests/consensus/devnet/networking/generates all 30 fixturesuv run fill --fork=devnet --clean -n autogenerates all 253 fixtures (no regressions)🤖 Generated with Claude Code