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## Summary - Adds Cloudflare R2 endpoint (`crs.aztec-cdn.foundation`) as primary CRS download source - Falls back to existing AWS S3 bucket (`crs.aztec.network`) on failure - Reduces costs (R2 has no egress fees) and improves reliability ## Changes - **C++**: Added fallback logic in `get_bn254_crs.cpp` with HTTPS support for R2 - **TypeScript**: Added `fetchWithFallback` helper in `net_crs.ts` - **Shell**: Added `download_with_fallback` function in `bootstrap.sh` and `download_bb_crs.sh` - **Tests**: Added fallback tests for both C++ (`CrsFactory.Bn254Fallback`) and TypeScript ## Test plan - [x] C++ `srs_tests` pass (including new `Bn254Fallback` test) - [x] TypeScript `net_crs.test.ts` passes (tests primary download and fallback) - [x] Shell script download verified manually Resolves AztecProtocol/barretenberg#1609
…e is not generated by Noir (#20125) add redundant range constraints when AES, ACIR opcode is not generated by Noir --------- Co-authored-by: sergei iakovenko <105737703+iakovenkos@users.noreply.github.com> Co-authored-by: ledwards2225 <98505400+ledwards2225@users.noreply.github.com> Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com> Co-authored-by: AztecBot <tech@aztecprotocol.com>
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BEGIN_COMMIT_OVERRIDE
feat: add Cloudflare R2 as primary CRS host with S3 fallback (#20081)
fix: (AES audit) add redundant range constraints when AES, ACIR opcode is not generated by Noir (#20125)
END_COMMIT_OVERRIDE