ethereum/execution-specs

Specification for the Execution Layer. Tracking network upgrades.

Stars: 1.2k
Forks: 505
Open beginner issues: 7
Indexed issues: 343
Avg merge: 3d 5h
Merged PRs (30d): 118

Dominant language: Python
License: CC0-1.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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Cut tests-focil-devnet@v0.2.1 so the focil board picks up the merged inclusion-list fixture fix Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

ethereum/execution-specs#3629 · Opened Sep 21, 2026
chore(test-fill): finish pre-alloc grouping safety and retire Engine X drift checks Open

A-test-fill C-chore

Difficulty 5/5 Over a week Newbie friendliness 25/100

ethereum/execution-specs#3621 · Opened Sep 18, 2026
refactor(json-loader): use existing Pydantic fixture models Open

A-spec-tests C-refactor

ethereum/execution-specs#3617 · 2 assignees · Opened Sep 18, 2026
consume direct: block-test failures against Nethermind nethtest are never detected Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

ethereum/execution-specs#3609 · 1 comment · 1 reaction · Opened Sep 16, 2026
fill: plain pytest test in a fixture directory crashes collection with INTERNALERROR Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

ethereum/execution-specs#3608 · 1 comment · Opened Sep 16, 2026
Enable exception mapping for nimbus-el Open

A-test-client-clis C-chore

ethereum/execution-specs#3603 · 1 comment · 2 assignees · Opened Sep 16, 2026
feat(test-specs): filter system contracts by call phase in the framework, not in tests Open

A-test-specs C-feat P-low

ethereum/execution-specs#3584 · 1 assignee · Opened Sep 14, 2026
EIP-8369 Profile 2: deterministic Frame omission check for FOCIL Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3543 · Opened Sep 7, 2026
Test Release Tracker: `frames-devnet@v0.3.0` Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

ethereum/execution-specs#3532 · Opened Sep 4, 2026
Create tests to replicate common mainnet contract patterns Open

A-tests E-medium P-low

ethereum/execution-specs#3517 · 1 assignee · Opened Sep 3, 2026
Resolve implicit gas limits in transaction tests Open

A-test-fixtures C-feat

ethereum/execution-specs#3489 · 1 assignee · Opened Sep 1, 2026
RLP nesting bound is unspecified; reference acceptance depth depends on sys.getrecursionlimit Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3469 · Opened Aug 30, 2026
feat: new test spec type, fixture format and consume simulator for `engine_getInclusionListV1` (EIP-7805) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3456 · 4 comments · Opened Aug 26, 2026
blockchain_test_engine bugs in tests-focil-devnet@v0.2.0: BAL validation vs gasLimit failure Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ethereum/execution-specs#3439 · 1 comment · Opened Aug 25, 2026
feat(test-execute): Allow `execute` to use `eth_estimateGas` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3437 · 1 reaction · Opened Aug 24, 2026
Audit pre-Cancun GeneralStateTest coverage in execution-specs Open

A-tests C-chore

ethereum/execution-specs#3404 · 3 comments · 2 assignees · Opened Aug 20, 2026
perf(test-fill): every engine_x t8n call copies and re-merklizes the whole merged pre-alloc group Open

A-test-fill C-perf

ethereum/execution-specs#3403 · 2 assignees · Opened Aug 20, 2026
perf(test-benchmark): consider using pypy to fill benchmark releases Open

A-test-benchmark C-perf

ethereum/execution-specs#3402 · 1 assignee · Opened Aug 20, 2026
Issue tracker for performance improvement to `fill` & `fill-stateful` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ethereum/execution-specs#3395 · 1 reaction · Opened Aug 19, 2026
Issue tracker to full benchmark test suite & glamsterdam-devnet-8 migration Open

A-test-benchmark C-feat

ethereum/execution-specs#3375 · 1 assignee · Opened Aug 14, 2026
t8n: rejected transactions produce inconsistent transaction and receipt roots Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ethereum/execution-specs#3362 · Opened Aug 11, 2026
Proposal: Merge binary and zkevm to `forks/amsterdam|bogota` Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ethereum/execution-specs#3355 · Opened Aug 11, 2026
bug(tests): released fixtures in tests-zkevm@v0.6.2 contain blocks without statelessInputBytes Open

zkEVM

Difficulty 3/5 1-2 days Newbie friendliness 52/100

ethereum/execution-specs#3343 · 1 comment · Opened Aug 9, 2026
Backport fork-generic tests from projects/binary-trie to forks/amsterdam Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

ethereum/execution-specs#3342 · Opened Aug 9, 2026
EIP-161: Sending zero to an empty account Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ethereum/execution-specs#3341 · 1 comment · Opened Aug 9, 2026
Consider extending test converage to execution-api tests Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3339 · 2 reactions · Opened Aug 8, 2026
Test reorgs of the binary trie post flip Open

C-binary

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ethereum/execution-specs#3334 · 2 comments · Opened Aug 7, 2026
Test binary tree post flip cache invalidation Open

C-binary

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ethereum/execution-specs#3333 · Opened Aug 7, 2026
Issue tracker for worst case benchmark Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3329 · Opened Aug 6, 2026
chore(testing): delete or revive test_count_opcodes.py (never runnable since introduction) Open

A-test-tests C-chore

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ethereum/execution-specs#3326 · 1 comment · Opened Aug 6, 2026
Tracking issue for PBT deletion tests Open

C-binary

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ethereum/execution-specs#3325 · 3 comments · Opened Aug 6, 2026
Benchmark Full Suite Generation Tracker Open

A-test-benchmark C-tracker

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ethereum/execution-specs#3281 · 1 comment · Opened Aug 3, 2026
First Class Ported Static Tests Tracker Open

C-tracker

ethereum/execution-specs#3272 · 1 comment · 1 assignee · Opened Jul 31, 2026
valid_at-pinned tests are silently excluded when filling against a development fork Open

C-binary

Difficulty 5/5 Over a week Newbie friendliness 42/100

ethereum/execution-specs#3260 · Opened Jul 29, 2026
EIP-8297: state-root computation raises raw Python errors instead of protocol-level failures Open

C-binary

Difficulty 4/5 3-5 days Newbie friendliness 38/100

ethereum/execution-specs#3255 · Opened Jul 29, 2026
Tracking issue: fork/spec agnostic benchmarks Open

A-test-benchmark C-feat C-refactor E-hard P-high

ethereum/execution-specs#3252 · 1 assignee · Opened Jul 29, 2026
Genesis state-root computation is coupled to the MPT across the testing tooling Open

C-binary

Difficulty 5/5 Over a week Newbie friendliness 35/100

ethereum/execution-specs#3251 · 2 reactions · Opened Jul 28, 2026
bug(cli-eest): `AppConfig.version` queries github.com Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

ethereum/execution-specs#3241 · 2 comments · Opened Jul 27, 2026
Test Release Tracker: `tests@v21.0.0` (Glamsterdam Testnet) Open

C-tracker

Difficulty 5/5 Over a week Newbie friendliness 25/100

ethereum/execution-specs#3217 · 1 comment · 2 reactions · Opened Jul 23, 2026
Replace native Python blake2 implementation with `blake2-py` Open

A-deps A-spec-specs C-refactor stale

ethereum/execution-specs#3181 · 2 comments · 1 assignee · Opened Jul 15, 2026
feat(ci): nightly fills of active dev-fork branches Open

A-ci C-feat stale

Difficulty 4/5 3-5 days Newbie friendliness 52/100

ethereum/execution-specs#3178 · 2 comments · Opened Jul 15, 2026
Publish 3.14 wheels for `ethash` Open

stale

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ethereum/execution-specs#3173 · 3 comments · Opened Jul 15, 2026
fix(tests): Fix hard-coded references to gas_costs.CALL_STIPEND Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

ethereum/execution-specs#3139 · 1 comment · Opened Jul 9, 2026
fill-stateful: replace debug-namespace chain rewind with an engine API anchor-block rewind Open

stale

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ethereum/execution-specs#3134 · 1 comment · Opened Jul 9, 2026
chore(tests): Remove hard-coded gas limits from system contract tests Open

stale

Difficulty 3/5 1-2 days Newbie friendliness 64/100

ethereum/execution-specs#3071 · 3 comments · Opened Jun 30, 2026
Ensure benchmarks measure the intended access patterns Open

A-test-benchmark C-feat stale

ethereum/execution-specs#2961 · 4 comments · 1 assignee · Opened Jun 8, 2026
Add `fill` flag to explicitly specify the output fixture formats Open

stale

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ethereum/execution-specs#2959 · 2 comments · Opened Jun 4, 2026
Is `GasCosts.ZERO` useful? Open

A-spec-specs C-chore E-easy P-low

ethereum/execution-specs#2958 · 3 comments · 1 assignee · Opened Jun 4, 2026
t8n should use in-process traces Open

A-spec-tools E-medium P-low stale

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ethereum/execution-specs#2939 · 1 comment · Opened May 29, 2026
t8n should use the transaction rlp provided by the testing framwork Open

A-spec-tools

ethereum/execution-specs#2925 · 2 comments · 1 assignee · Opened May 27, 2026

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