text: /*
  Snowgem uses SHA256Compress as a PRF for various components
  within the zkSNARK circuit.
  */
  
  #ifndef ZC_PRF_H_
  #define ZC_PRF_H_
  
  #include "uint256.h"
  #include "uint252.h"
  
  uint256 PRF_addr_a_pk(const uint252& a_sk);
  uint256 PRF_addr_sk_enc(const uint252& a_sk);
  uint256 PRF_nf(const uint252& a_sk, const uint256& rho);
  uint256 PRF_pk(const uint252& a_sk, size_t i0, const uint256& h_sig);
  uint256 PRF_rho(const uint252& phi, size_t i0, const uint256& h_sig);
  
  #endif // ZC_PRF_H_
  