Add more logging during loading (#63)

prover/marshal.go

@@ -8,6 +8,7 @@ import (
  "io"
  "math/big"
  "os"
+ "worldcoin/gnark-mbu/logging"
 
  "github.com/consensys/gnark-crypto/ecc"
  "github.com/consensys/gnark/backend/groth16"
@@ -289,34 +290,39 @@ func (ps *ProvingSystem) UnsafeReadFrom(r io.Reader) (int64, error) {
  var totalRead int64 = 0
  var intBuf [4]byte
 
+ logging.Logger().Debug().Msg("Reading tree depth")
  read, err := io.ReadFull(r, intBuf[:])
  totalRead += int64(read)
  if err != nil {
  return totalRead, err
  }
  ps.TreeDepth = binary.BigEndian.Uint32(intBuf[:])
 
+ logging.Logger().Debug().Msg("Reading batch size")
  read, err = io.ReadFull(r, intBuf[:])
  totalRead += int64(read)
  if err != nil {
  return totalRead, err
  }
  ps.BatchSize = binary.BigEndian.Uint32(intBuf[:])
 
+ logging.Logger().Debug().Msg("Reading proving key")
  ps.ProvingKey = groth16.NewProvingKey(ecc.BN254)
  keyRead, err := ps.ProvingKey.UnsafeReadFrom(r)
  totalRead += keyRead
  if err != nil {
  return totalRead, err
  }
 
+ logging.Logger().Debug().Msg("Reading verifying key")
  ps.VerifyingKey = groth16.NewVerifyingKey(ecc.BN254)
  keyRead, err = ps.VerifyingKey.UnsafeReadFrom(r)
  totalRead += keyRead
  if err != nil {
  return totalRead, err
  }
 
+ logging.Logger().Debug().Msg("Reading constraint system")
  ps.ConstraintSystem = groth16.NewCS(ecc.BN254)
  keyRead, err = ps.ConstraintSystem.ReadFrom(r)
  totalRead += keyRead