fuzz: move Core-oracle harness out of rbitcoin-net (X-07) - #416
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September 10, 2026 16:59
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block_diff and the BIP152/v2 encode wrappers compiled into rbitcoin-net though only fuzz targets used them. They now live in the fuzz crate. Net keeps shipped surfaces (ChainHub accept, try_reconstruct, encode_v2_contents, drain_pending_now, PendingBlocks). Recipe fixtures moved to fuzz/fixtures/; fuzz-run.sh still seeds from there.
fuzz/ stays a cargo-fuzz workspace so bitcoinconsensus is not in the product graph. Never-compiled rbitcoin-log test targets path to fuzz/src and fuzz/fuzz_targets so workspace fmt still visits them.
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Summary
Suggested-order step 6 / inventory X-07 (also N-07 / N-13): the Core-oracle differential harness and fuzz-only compact/v2 recipe helpers no longer compile into
rbitcoin-net/ the node.block_diff(verdict-onlysubmitblock/ mempool / reorg compare) lives infuzz/src/block_diff.rs.prepare_cmpct_fuzz_*,CmpctFuzzCase,encode_ping_v2/cmpctblock/ …) live infuzz/src/cmpct_fuzz.rs.fuzz/fixtures/.scripts/fuzz-run.shstill seeds from there.fuzz.ymlis unchanged (stillcargo fuzzagainst the fuzz package).ChainHub::accept_*,try_reconstruct,shortid_map_from_txs,prefilled_indexes_ok,classify_v2_cmpct_peer,encode_v2_contents,drain_pending_now,PendingBlocks.rbitcoin-netproduction, not the fuzz crate (TESTING.md). Remaining net pins: reconstruct / classify / v2 sendcmpct fixture /cmpct_h1_two_tx.Production default stays Mainnet. Fixtures stay Tiny. Do not merge unless asked.
Test plan
cargo check --manifest-path fuzz/Cargo.toml --bin block_differentialcargo check --manifest-path fuzz/Cargo.toml --bin cmpct_differentialcargo test --manifest-path fuzz/Cargo.toml --lib(moved harness + recipe fixtures)cargo test -p rbitcoin-net --libtry_reconstruct_empty_mempool_two_tx_is_index_1/classify_v2_ping_and_empty_other/v2_sendcmpct_fixture_matches_encode/cmpct_h1_two_tx_fixture_matches_minedscripts/fuzz-run.test.shDo not merge unless asked.