nmc(card237): second node-verified auxpow wire KAT (mainnet 829949) - #228
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Add MainnetBlock829949RoundTrip alongside the existing 757000 case in src/impl/nmc/test/auxpow_wire_test.cpp. The vector is the raw getblock 0 hex of Namecoin mainnet block 829949 (hash f876ce3f...e6b92b), pulled LIVE 2026-06-19 from the .140 pruned mainnet node (height 829950, initialblockdownload=false). It carries a distinct BTC parent (versionHex 0x234c4000) from the 757000 case. Rationale: the round-trip memcmp only proves the CAuxPow serializer is self-consistent against the supplied blob, so the KAT s strength rests entirely on the vector being genuine external truth. 757000 is below this pruned node s horizon and cannot be re-verified; this second case pins the serializer against an independently node-verified blob at a different height/parent. Both cases pass (EXIT=0). Fenced: src/impl/nmc/test/ only; rides the allowlisted nmc_auxpow_wire_test exe, no build.yml or CMake change.
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Adds a second wire-vector KAT case to
src/impl/nmc/test/auxpow_wire_test.cpp:MainnetBlock829949RoundTrip, the rawgetblock 0hex of Namecoin mainnet block 829949 (hash f876ce3f...e6b92b), pulled LIVE 2026-06-19 from the .140 pruned mainnet node (height 829950, IBD complete). Distinct BTC parent (versionHex 0x234c4000) from the existing 757000 case.Why: the round-trip memcmp only proves the CAuxPow serializer is self-consistent against the supplied blob, so the KAT s strength rests on the vector being genuine external truth. 757000 is below this pruned node s horizon and cannot be re-verified; this case pins the serializer against an independently node-verified blob at a different height/parent.
Both cases PASS locally (EXIT=0). Fenced: src/impl/nmc/test/ only; rides the allowlisted nmc_auxpow_wire_test exe, no build.yml/CMake change. GPG-signed, no third-party attribution.