Segment 11
In this sub-session, the assistant focused exclusively on debugging the PSProve PoRep failure where CuZK-generated SNARKs fail ffi.VerifySeal. The assistant systematically traced the RegisteredSealProof enum mappings across Go (filecoin-ffi), C (cgo), and Rust (cuzk-core), confirming they are identical, and verified that the CuZK gRPC service layer and Rust SealCommitPhase1Output struct perfectly match the Go Commit1OutRaw. The non-CuZK FFI path was confirmed to work with the Go-re-serialized JSON, proving semantic validity of the round-trip. The assistant investigated the user's hint about fr32 seed masking, discovering that powsrv does not apply the standard seed[31] &= 0x3f truncation, but analysis of the Rust challenge derivation code showed the seed is used as raw bytes for SHA256, not directly as an Fr element, ruling this out as the root cause of the intermittent failure (though it remains a correctness issue in powsrv). To resolve the bug, the assistant extended the existing 2KiB roundtrip test to cover the full CuZK wrapper and FFI C2 verification path, and added comprehensive diagnostic logging to computePoRep in task_prove.go to capture exact byte streams and verification inputs on failure. The vast-manager worker system remained operational with no new changes.