Arseniy Klempner 2d40cb9d62
fix: hash inputs for external nullifier, remove length prefix for sha256 (#3660)
* fix: hash inputs for external nullifier, remove length prefix for sha256

* feat: use nimcrypto keccak instead of sha256 ffi

* feat: wrapper function to generate external nullifier
2025-12-17 18:51:10 -08:00
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