parsing verifier only circuit data works

Digest.hs

@@ -0,0 +1,84 @@
+
+{-# LANGUAGE DeriveGeneric, OverloadedStrings #-}
+module Digest where
+
+--------------------------------------------------------------------------------
+
+import Data.Array
+import Data.Word
+import Data.Bits
+
+import GHC.Generics
+import Data.Aeson ( FromJSON(..) , ToJSON(..) , object , withObject , (.=) , (.:) )
+
+import Goldilocks
+
+--------------------------------------------------------------------------------
+
+type State = Array Int F
+
+listToState' :: Int -> [F] -> State
+listToState' n = listArray (0,n-1)
+
+listToState :: [F] -> State
+listToState = listToState' 12
+
+zeroState' :: Int -> State
+zeroState' n = listToState' n (replicate n 0)
+
+zeroState :: State
+zeroState = zeroState' 12
+
+--------------------------------------------------------------------------------
+
+data Digest 
+  = MkDigest !F !F !F !F
+  deriving (Eq,Show,Generic)
+
+instance ToJSON Digest where
+  toJSON (MkDigest a b c d) = object [ "elements" .= toJSON [a,b,c,d] ]
+
+instance FromJSON Digest where
+  parseJSON = withObject "Digest" $ \obj -> listToDigest <$> obj .: "elements"
+
+zeroDigest :: Digest
+zeroDigest = MkDigest 0 0 0 0
+
+extractDigest :: State -> Digest
+extractDigest state = case elems state of 
+  (a:b:c:d:_) -> MkDigest a b c d
+
+extractCapacity :: State -> [F]
+extractCapacity state = case elems state of 
+  (_:_:_:_:_:_:_:_:a:b:c:d:[]) -> [a,b,c,d]
+
+listToDigest :: [F] -> Digest
+listToDigest [a,b,c,d] = MkDigest a b c d
+
+digestToList :: Digest -> [F]
+digestToList (MkDigest a b c d) = [a,b,c,d]
+
+--------------------------------------------------------------------------------
+
+digestToWord64s :: Digest -> [Word64]
+digestToWord64s (MkDigest a b c d) = [ fromF a, fromF b, fromF c, fromF d]
+
+digestToBytes :: Digest -> [Word8]
+digestToBytes = concatMap bytesFromWord64LE . digestToWord64s
+
+--------------------------------------------------------------------------------
+
+bytesFromWord64LE :: Word64 -> [Word8]
+bytesFromWord64LE = go 0 where
+  go 8  _  = []
+  go !k !w = fromIntegral (w .&. 0xff) : go (k+1) (shiftR w 8)
+
+bytesToWord64LE :: [Word8] -> Word64
+bytesToWord64LE = fromInteger . bytesToIntegerLE
+
+bytesToIntegerLE :: [Word8] -> Integer
+bytesToIntegerLE = go where
+  go []          = 0 
+  go (this:rest) = fromIntegral this + 256 * go rest
+
+--------------------------------------------------------------------------------

Goldilocks.hs

@@ -18,6 +18,9 @@ import Text.Printf
 
 import System.Random
 
+import GHC.Generics
+import Data.Aeson ( ToJSON(..), FromJSON(..) )
+
 --------------------------------------------------------------------------------
 
 type F = Goldilocks
@@ -81,10 +84,22 @@ rootsOfUnity = listArray (0,32) $ map toF
 
 newtype Goldilocks 
   = Goldilocks Integer 
-  deriving Eq
+  deriving (Eq,Generic)
+
+asInteger :: Goldilocks -> Integer
+asInteger (Goldilocks x) = x
 
 instance Show Goldilocks where
-  show (Goldilocks k) = printf "0x%016x" k
+  -- show (Goldilocks x) = printf "0x%016x" x
+  show (Goldilocks x) = show x
+
+--------------------------------------------------------------------------------
+
+instance ToJSON Goldilocks where
+  toJSON x = toJSON (asInteger x)
+
+instance FromJSON Goldilocks where
+  parseJSON o = mkGoldilocks <$> parseJSON o
 
 --------------------------------------------------------------------------------
 

Hash.hs

@@ -8,63 +8,41 @@ import Data.Word
 import Data.Bits
 
 import Goldilocks
+import Poseidon
+import Digest
 
 --------------------------------------------------------------------------------
 
-type State = Array Int F
+-- | Poseidon sponge construction (rate=8, capacity=4) without padding.
+--
+-- Notes:
+-- 
+-- * Plonky2 to use the sponge in \"overwrite mode\"
+--
+-- * No padding is applied (inputs are expected to be fixed length)
+--
+sponge :: [F] -> Digest
+sponge = go zeroState where
+  go !state [] = extractDigest state
+  go !state xs = case splitAt 8 xs of
+    (this,rest) -> go (permutation $ combine this state) rest
+  combine xs arr = listToState $ xs ++ drop (length xs) (elems arr)
 
-listToState' :: Int -> [F] -> State
-listToState' n = listArray (0,n-1)
+-- | Sponge with @10*1@ padding. The only place this is used is hashing
+-- the domain separator (which is empty by default)
+spongeWithPad :: [F] -> Digest
+spongeWithPad what = go zeroState (what ++ [1]) where
+  go !state [] = extractDigest state
+  go !state xs = case splitAt 8 xs of
+    (this,rest) -> go (permutation $ combine this state) rest
+  combine xs arr = let k = length xs in if k < 8 
+    then listToState $ xs ++ replicate (8-k-1) 0 ++ [1] ++ drop 8 (elems arr)
+    else listToState $ xs ++ drop k (elems arr)
 
-listToState :: [F] -> State
-listToState = listToState' 12
-
-zeroState' :: Int -> State
-zeroState' n = listToState' n (replicate n 0)
-
-zeroState :: State
-zeroState = zeroState' 12
+-- | Compression function for Merkle trees
+compress :: Digest -> Digest -> Digest
+compress x y = extractDigest $ permutation $ listToState s0 where
+  s0 = digestToList x ++ digestToList y ++ [0,0,0,0]
 
 --------------------------------------------------------------------------------
 
-data Digest 
-  = MkDigest !F !F !F !F
-  deriving (Eq,Show)
-
-zeroDigest :: Digest
-zeroDigest = MkDigest 0 0 0 0
-
-extractDigest :: State -> Digest
-extractDigest state = case elems state of 
-  (a:b:c:d:_) -> MkDigest a b c d
-
-listToDigest :: [F] -> Digest
-listToDigest [a,b,c,d] = MkDigest a b c d
-
-digestToList :: Digest -> [F]
-digestToList (MkDigest a b c d) = [a,b,c,d]
-
---------------------------------------------------------------------------------
-
-digestToWord64s :: Digest -> [Word64]
-digestToWord64s (MkDigest a b c d) = [ fromF a, fromF b, fromF c, fromF d]
-
-digestToBytes :: Digest -> [Word8]
-digestToBytes = concatMap bytesFromWord64LE . digestToWord64s
-
---------------------------------------------------------------------------------
-
-bytesFromWord64LE :: Word64 -> [Word8]
-bytesFromWord64LE = go 0 where
-  go 8  _  = []
-  go !k !w = fromIntegral (w .&. 0xff) : go (k+1) (shiftR w 8)
-
-bytesToWord64LE :: [Word8] -> Word64
-bytesToWord64LE = fromInteger . bytesToIntegerLE
-
-bytesToIntegerLE :: [Word8] -> Integer
-bytesToIntegerLE = go where
-  go []          = 0 
-  go (this:rest) = fromIntegral this + 256 * go rest
-
---------------------------------------------------------------------------------

Poseidon.hs

@@ -16,7 +16,7 @@ import Data.Array.IArray
 
 import Goldilocks
 import Constants
-import Hash
+import Digest
 
 --------------------------------------------------------------------------------
 

Types.hs

@@ -1,18 +1,26 @@
 
-{-# LANGUAGE StrictData #-}
+{-# LANGUAGE StrictData, DeriveGeneric, DeriveAnyClass #-}
 module Types where
 
 --------------------------------------------------------------------------------
 
 import Data.Word
 
+import Data.Aeson
+import GHC.Generics
+
 import Goldilocks
+import Digest
 
 --------------------------------------------------------------------------------
 
-type KeccakHash  = [Word8]
+newtype KeccakHash  
+  = MkKeccakHash [Word8]
+  deriving (Eq,Show,Generic)
 
-type LookupTable = [(Word64,Word64)]
+newtype LookupTable 
+  = MkLookupTable [(Word64,Word64)]
+  deriving (Eq,Show,Generic)
 
 --------------------------------------------------------------------------------
 
@@ -31,7 +39,7 @@ data CommonCircuitData = MkCommonCircuitData
   , circuit_num_lookup_selectors   :: Int              -- ^ The number of lookup selectors.
   , circuit_luts                   :: [LookupTable]    -- ^ The stored lookup tables.
   }
-  deriving (Eq,Show)
+  deriving (Eq,Show,Generic)
 
 data CircuitConfig = MkCircuitConfig
   { cfg_num_wires                  :: Int        -- ^ Number of wires available at each row. This corresponds to the "width" of the circuit, and consists in the sum of routed wires and advice wires.
@@ -45,42 +53,19 @@ data CircuitConfig = MkCircuitConfig
   , cfg_max_quotient_degree_factor :: Int        -- ^ A cap on the quotient polynomial's degree factor.
   , cfg_fri_config                 :: FriConfig
   }
-  deriving (Eq,Show)
+  deriving (Eq,Show,Generic)
 
 -- | The interval @[a,b)@ (inclusive on the left, exclusive on the right)
 data Range 
   = MkRange Int Int
-  deriving (Eq,Show)
+  deriving (Eq,Show,Generic)
 
 data SelectorsInfo = MkSelectorsInfo
   { selector_indices :: [Int]
   , groups           :: [Range]
   , selector_vector  :: Maybe [Int]
   }
-  deriving (Eq,Show)
-
-data FriConfig = MkFrConfig 
-  { fri_rate_bits          :: Int                      -- ^ @rate = 2^{-rate_bits}@
-  , fri_cap_height         :: Int                      -- ^ Height of Merkle tree caps.
-  , fri_proof_of_work_bits :: Int                      -- ^ Number of bits used for grinding.
-  , fri_reduction_strategy :: FriReductionStrategy     -- ^ The reduction strategy to be applied at each layer during the commit phase.
-  , fri_num_query_rounds   :: Int                      -- ^ Number of query rounds to perform.
-  }
-  deriving (Eq,Show)
-
-data FriReductionStrategy 
-  = Fixed             { arity_bits_seq :: [Int] }
-  | ConstantArityBits { arity_bits :: Int , final_poly_bits :: Int }
-  | MinSize           { opt_max_arity_bits :: Maybe Int }
-  deriving (Eq,Show)
-
-data FriParams = MkFriParams
-  { fri_config               :: FriConfig   -- ^ User-specified FRI configuration.
-  , fri_hiding               :: Bool        -- ^ Whether to use a hiding variant of Merkle trees (where random salts are added to leaves).
-  , fri_degree_bits          :: Int         -- ^ The degree of the purported codeword, measured in bits.
-  , fri_reduction_arity_bits :: [Int]       -- ^ The arity of each FRI reduction step, expressed as the log2 of the actual arity.
-  }
-  deriving (Eq,Show)
+  deriving (Eq,Show,Generic)
 
 data Gate
   = ArithmeticGate          { num_ops    :: Int }
@@ -99,6 +84,56 @@ data Gate
   | RandomAccessGate        { bits :: Int, num_copies :: Int, num_extra_constants :: Int }
   | ReducingGate            { num_coeffs :: Int }
   | ReducingExtensionGate   { num_coeffs :: Int }
-  deriving (Eq,Show)
+  deriving (Eq,Show,Generic)
 
 --------------------------------------------------------------------------------
+
+data FriConfig = MkFrConfig 
+  { fri_rate_bits          :: Int                      -- ^ @rate = 2^{-rate_bits}@
+  , fri_cap_height         :: Int                      -- ^ Height of Merkle tree caps.
+  , fri_proof_of_work_bits :: Int                      -- ^ Number of bits used for grinding.
+  , fri_reduction_strategy :: FriReductionStrategy     -- ^ The reduction strategy to be applied at each layer during the commit phase.
+  , fri_num_query_rounds   :: Int                      -- ^ Number of query rounds to perform.
+  }
+  deriving (Eq,Show,Generic)
+
+data FriReductionStrategy 
+  = Fixed             { arity_bits_seq :: [Int] }
+  | ConstantArityBits { arity_bits :: Int , final_poly_bits :: Int }
+  | MinSize           { opt_max_arity_bits :: Maybe Int }
+  deriving (Eq,Show,Generic)
+
+data FriParams = MkFriParams
+  { fri_config               :: FriConfig   -- ^ User-specified FRI configuration.
+  , fri_hiding               :: Bool        -- ^ Whether to use a hiding variant of Merkle trees (where random salts are added to leaves).
+  , fri_degree_bits          :: Int         -- ^ The degree of the purported codeword, measured in bits.
+  , fri_reduction_arity_bits :: [Int]       -- ^ The arity of each FRI reduction step, expressed as the log2 of the actual arity.
+  }
+  deriving (Eq,Show,Generic)
+
+--------------------------------------------------------------------------------
+
+newtype PublicInputs 
+  = MkPublicInputs [F]
+  deriving (Eq,Show,Generic)
+
+data VerifierCircuitData = MkVerifierCircuitData
+  { verifier_only   :: VerifierOnlyCircuitData
+  , verifier_common :: CommonCircuitData
+  }
+  deriving (Eq,Show,Generic)
+
+newtype MerkleCap 
+  = MkMerkleCap [Digest]
+  deriving (Eq,Show,Generic)
+
+data VerifierOnlyCircuitData = MkVerifierOnlyCircuitData
+  { constants_sigmas_cap :: MerkleCap     -- ^ commitment to list of constant polynomial and sigma polynomials
+  , circuit_digest       :: Digest        -- ^ a digest of the "circuit" (i.e. the instance, minus public inputs), which can be used to seed Fiat-Shamir
+  }
+  deriving (Eq,Show,Generic,ToJSON,FromJSON)
+
+--------------------------------------------------------------------------------
+
+instance ToJSON   MerkleCap where toJSON (MkMerkleCap caps) = toJSON caps
+instance FromJSON MerkleCap where parseJSON o = MkMerkleCap <$> parseJSON o

testmain.hs

@@ -0,0 +1,27 @@
+
+module Main where
+
+--------------------------------------------------------------------------------
+
+import Data.Aeson
+
+import Types
+import Hash
+import Digest
+import Goldilocks
+
+import qualified Data.ByteString.Char8      as B
+import qualified Data.ByteString.Lazy.Char8 as L
+
+--------------------------------------------------------------------------------
+
+main = do
+  let publicIO = MkPublicInputs [0, 1, 3736710860384812976]
+  text_common <- L.readFile "json/fibonacci_common.json"
+  text_proof  <- L.readFile "json/fibonacci_proof.json"
+  text_vkey   <- L.readFile "json/fibonacci_vkey.json"
+
+  let Just vkey = decode text_vkey :: Maybe VerifierOnlyCircuitData
+  print vkey
+  putStrLn ""
+  L.putStr (encode vkey)