test(dash): S8 stratum-binding contract KAT (extranonce2 nonce64-slot)#630
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This was referenced Jul 4, 2026
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Rebase-clean union of the #628-vs-#630 add_executable collision left target_link_libraries(test_dash_share_messages) opened but unterminated with add_executable(test_dash_stratum_binding) interleaved into it, producing CMake parse error at test/CMakeLists.txt:322 (missing ending ) and breaking configure on all platforms (macOS/Windows failed fast; Linux would follow). Split into two complete, separate target blocks. Configure clean; test_dash_stratum_binding builds; ctest 6/6.
This was referenced Jul 4, 2026
Fenced test-only slice: pins the get_work() -> stratum job BINDING contract (coinbase nonce64 / extranonce2 slot geometry + coinb1/coinb2 split and reassembly that partitions the miner search space) against oracle frstrtr/p2pool-dash @9a0a609 work.py:21,421,436-438. 6 KATs, all derived independently of the SUT (oracle contract + Python sha256d goldens): Extranonce2WidthOraclePin EXTRANONCE2_SIZE == COINBASE_NONCE_LENGTH == 8 SplitBoundaryGeometry coinb1=bytes[:off], coinb2=bytes[off+8:] ZeroNonceIsIdentity zero nonce reassembles gentx byte-for-byte (:437) SlotIsolation only the 8 slot bytes move across extranonce2 BindingInjectivity distinct extranonce2 -> distinct coinbase leaf GoldenLeafHashes independent sha256d byte-parity anchors Pure/socket-free/node-free (synthetic CoinbaseLayout, no dashd, no sharechain). Touches only test/ + build.yml allowlist -> IDENTIFIER-neutral, non-consensus, independently landable ahead of the migration GO. No self-merge.
Rebase-clean union of the #628-vs-#630 add_executable collision left target_link_libraries(test_dash_share_messages) opened but unterminated with add_executable(test_dash_stratum_binding) interleaved into it, producing CMake parse error at test/CMakeLists.txt:322 (missing ending ) and breaking configure on all platforms (macOS/Windows failed fast; Linux would follow). Split into two complete, separate target blocks. Configure clean; test_dash_stratum_binding builds; ctest 6/6.
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Fenced, test-only, non-consensus warm-lane slice (integrator-authorized on the [s=g1-vardiff-kat-pushed] thread as the next slice after #627).
What
Pins the get_work() -> stratum job binding contract — the coinbase nonce64 / extranonce2 slot geometry and the coinb1/coinb2 split+reassembly that partitions the miner search space. Complements #627/test_dash_work_job_targets (which pin the job target arithmetic) — this is the coinbase nonce-binding half of the same get_work() path.
Oracle
frstrtr/p2pool-dash @9a0a609 p2pool/work.py:21,421,436-438 (COINBASE_NONCE_LENGTH=8; coinb1 = gentx[:-payload-8-4]; zero-nonce reassembly == gentx). Non-circular: every expected value derived from the oracle contract or an independent Python sha256d, not from the SUT.
Coverage (6 KATs, all green locally)
Fencing / classification
Touches only test/test_dash_stratum_binding.cpp, test/CMakeLists.txt, and the build.yml test allowlist (x2). No prod/consensus code; pure/socket-free/node-free (synthetic CoinbaseLayout, no dashd, no sharechain). IDENTIFIER/PREFIX-neutral — a bucket-1 regression guard, not oracle-conformance mutation. Independently landable ahead of the migration GO. No self-merge — integrator verifies FULL gh CI rollup.