feat(standard-contracts): prototype C++-driven address derivation in bb#23350
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This was referenced May 17, 2026
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Adds a new `bb derive_standard_contract_addresses` subcommand that reads freshly-built Noir artifacts and stamps the standard-contract addresses into `standard_addresses.nr` (in both the aztec-nr/aztec crate and the aztec_sublib twin) before the rest of noir-contracts compiles against them. This breaks the build-order chicken-and-egg in the current TS-based generator: the TS generator depends on the yarn-project build, but the addresses need to be baked in before noir-contracts finishes. For auth_registry and public_checks the derived address is byte-identical to the TS-derived one (verified against the existing pinned values). Known prototype limitations: - `artifact_hash` and `private_functions_root` are READ from a sidecar manifest (`standard_contract_class_id_preimages.json`) instead of being derived from the artifact in C++. Porting their TS derivation (sha256-reduced-to-Fr merkle over selectors + metadata hashes, plus deterministic-JSON-stringify of contract outputs) is the natural follow-up. - Bootstrap integration only handles auth_registry + public_checks; extending to multi_call_entrypoint is mechanical. - The TS generator (`generate:data`) is left in place as a drift check — it still produces the same `standard_addresses.nr`, so any divergence fails the build loudly.
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