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Protocol 28 (CAP-0083) ingestion#195

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sisuresh wants to merge 3 commits into
stellar:protocol-nextfrom
sisuresh:p28-cap-0083
Closed

Protocol 28 (CAP-0083) ingestion#195
sisuresh wants to merge 3 commits into
stellar:protocol-nextfrom
sisuresh:p28-cap-0083

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@sisuresh

@sisuresh sisuresh commented Jun 15, 2026

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Changes

  • Bump MaxSupportedProtocolVersion to 28.
  • Re-pin go-stellar-sdk to the CAP-0083 XDR regeneration (replace → fork SPIKE 9856e203).

Deferred

  • v28 load-test fixtures (load-test-{ledgers,fixtures}-v28.xdr.zstd): TestLoadTestLedgerBackendWithoutMerge fails with open testdata/load-test-ledgers-v28.xdr.zstd: no such file or directory once MaxProto=28. Generation needs a protocol-28 core buildtests image, which is unpublished: curl -s "https://hub.docker.com/v2/repositories/stellar/unsafe-stellar-core/tags/?page_size=100&name=28.0"count=0 (same for stellar/stellar-core); horizon.yml pins core for P26/P27 only. Regenerate via TestGenerateLedgers once a P28 core ships.

Upstream (blocking; flip replace to the merged commit + mark ready once it lands):

Downstream sibling:

urvisavla and others added 2 commits June 10, 2026 15:20
* Protocol 27 ingestion (stellar#186)

* Protocol 27 (CAP-0071 + CAP-0083) ingestion support

- Pin go-stellar-sdk to the CAP-71/CAP-83 XDR build.
- Bump MaxSupportedProtocolVersion to 27.
- Implement GetLedgerRaw on fakeLedgerBackend (added to the SDK
  LedgerBackend interface).

* update core test lcm

* add GetLedgerRaw

* update

* Bump go-stellar-sdk to CAP-71-only XDR; drop CAP-83 fixture

go-stellar-sdk@130456cc9b69 is regenerated from stellar-xdr@68fa1ac (post-
stellar/stellar-xdr#303 ungate of CAP_0071) with XDR_FEATURES cleared, so
the bind no longer carries the CAP-0083 STELLAR_VALUE_EMPTY_TX_SET path —
matching the p27 release scope (CAP-0071 only; CAP-0083 deferred).

The SDK bump also transitively picks up stellar/go-xdr#32, which raises
DecodeDefaultMaxDepth 250 → 1500, so the CAP-71 240-deep delegate fixture
(test-lcms/InvokeHostFunctionTests/a7a45d93c64cf3d9.xdr) now ingests
without ErrMaxDecodingDepth.

The HerderTests fixture (network_externalizes_empty-tx-set_on_missing_value)
no longer decodes under CAP-71-only XDR (StellarValueType 2 is gone) and is
removed.

* Bump go-stellar-sdk to latest CAP-71-only build (a8d5b306)

* Bump protocol 26 core version to 27.0.0-3288.7696c069d

* Support core 27 apply-load config in TestGenerateLedgers

Core 27 reworked the apply-load configuration: the sampled load
parameters (APPLY_LOAD_INSTRUCTIONS, APPLY_LOAD_TX_SIZE_BYTES,
APPLY_LOAD_NUM_RW_ENTRIES, etc.) were removed in favor of an
APPLY_LOAD_MODE selector, and the apply-load command now force
overrides NETWORK_PASSPHRASE to "Apply Load" and runs at the core's
current ledger protocol version.

- Add testdata/apply-load-v27.cfg based on core 27's
  docs/apply-load-for-meta.cfg
- Select the default config based on the core binary's major version
- Assert ledger protocol version against the core binary's reported
  protocol version instead of the max supported protocol env var

* Add v27 load-test fixtures; restore deep-delegate LCM fixture

- Add load-test-ledgers-v27.xdr.zstd / load-test-fixtures-v27.xdr.zstd,
  generated via TestGenerateLedgers using the same stellar-core build CI
  pins (27.0.0-3288.7696c069d, buildtests). Fixes
  TestLoadTestLedgerBackendWithoutMerge, which looks up the fixture for
  MaxSupportedProtocolVersion (now 27).
- Core 27's apply-load command force-overrides the network passphrase to
  "Apply Load", so the load tests now select the fixture passphrase by
  protocol version.
- Restore the 240-deep CAP-71 delegate-tree LCM fixture
  (InvokeHostFunctionTests/a7a45d93c64cf3d9.xdr, still referenced by
  index.json): it was dropped while go-xdr's max decoding depth was 250,
  and ingests cleanly again with stellar/go-xdr#32 (depth 1500).

* Bump integration tests to use Protocol 27 (stellar#189)

* Bump go-stellar-sdk to v0.6.0 (stellar#191)

* Bump verify-range stellar-core to Protocol 27 noble build (stellar#192)

---------

Co-authored-by: Siddharth Suresh <siddharth@stellar.org>
Co-authored-by: urvisavla <urvi.savla@stellar.org>
Re-pin go-stellar-sdk to the CAP-0083 XDR regeneration (SPIKE) and bump
MaxSupportedProtocolVersion to 28.
@sisuresh sisuresh closed this Jun 16, 2026
@sisuresh sisuresh deleted the p28-cap-0083 branch June 16, 2026 00:26
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2 participants