Partial data column containers for Gloas - #17348
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The alpha.14 parent_execution_payload vectors set latest_execution_payload_bid.slot without latest_block_header.slot, so the header slot only becomes usable here with the alpha.15 vectors (consensus-specs#5554).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Squash of the feat/gloas-partial-column-container-changes work (origin tip bab7dc6, i.e. everything on top of the spectest-alpha-12 chain 3e89799, which is already in develop via #17310) rebased onto alpha13. Merge notes vs alpha13: - proposer_payload_envelope.go: partial columns ride along the cache-first publish path from #17391 (cachedDataColumns returns them too); sidecarsFromContents returns sidecars plus partial columns. - two_node_test.go: the Gloas copy of TestTwoNodePartialColumnExchange gets the connect-early fix from #17361, same as the Fulu test. - blockchain/testing/mock.go: only RecentBlockSlotErr is added. - encoding/ssz/BUILD.bazel: stale fastssz test dep dropped by gazelle. - proto/prysm/v1alpha1/gloas.yaml: partial column types re-added and SSZ regenerated with make gen (no drift). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
The minimal.tar.gz asset of the v1.7.0-beta.0 consensus-specs release was re-uploaded at 2026-09-04T02:24Z, after alpha13 pinned it, so the pinned sha256 no longer matches (mainnet and general are unchanged). Belongs in #17382; kept as a separate commit here so this branch builds and runs the spectests. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
broadcastDataColumnSidecars joined each column topic lazily inside the batch full-sidecar path while the partial publish for the same column ran concurrently. When the partial publish won the race on a topic the node is not subscribed to, the pubsub router had no local topic state yet, MeshPeers selected no peers, and the column was never sent. A full-node proposer hit this on its first proposal after a fork: peers ended the slot holding exactly the proposer's subscribed columns and the payload went empty network-wide. Join every column topic up front, before dispatching either publish path. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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What
Stacks the Gloas partial data column container work on top of #17382.
Kurtosis Testing
Cherry-pick commit 9b36b8f on top of this branch which simulates private blobs/blobs missing in the EL.
Kurtosis config file:
Hey ! Ofcourse. Something like this works :