mfmts (empty) → 1.0.0.0

raw patch · 20 files changed

+3221/−0 lines, 20 filesdep +arraydep +basedep +basesystems

Dependencies added: array, base, basesystems, bytestring, containers, crypton, memory, mfmts, text

Files

• CHANGE_LOG.md +14/−0
• LICENSE.txt +661/−0
• README.md +91/−0
• cid/MultiFormats/CID.hs +100/−0
• cid/MultiFormats/CID/Errors.hs +57/−0
• cid/MultiFormats/CID/Extractor.hs +31/−0
• cid/MultiFormats/CID/Internal.hs +107/−0
• cid/MultiFormats/CID/Internal/CIDCodec.hs +18/−0
• cid/MultiFormats/CID/Internal/CIDDecoder.hs +29/−0
• cid/MultiFormats/CID/Internal/CIDHash.hs +42/−0
• cid/MultiFormats/CID/Internal/CIDVersion.hs +108/−0
• cid/MultiFormats/CID/Parser.hs +20/−0
• cid/MultiFormats/CID/Serializer.hs +41/−0
• mfmts.cabal +138/−0
• multibase/MultiFormats/MultiBase.hs +108/−0
• multibase/MultiFormats/MultiBaseSystems.hs +102/−0
• multicodec/MultiFormats/MultiCodec.hs +1299/−0
• multihash/MultiFormats/MultiHash.hs +104/−0
• varint/MultiFormats/VarInt.hs +123/−0
• varint/MultiFormats/VarInt/Errors.hs +28/−0

@@ -0,0 +1,14 @@+Hackage [`mfmts`](http://hackage-content.haskell.org/package/mfmts) package+change log:+=====================================================================++## Version 1.0.0.0++Introducing this package to Hackage! This release introduces the basic structure+for the project and provides the following libraries:++- `mfmts-varint` for processing variable length integer inputs.+- `mfmts-multicodec` for providing a lookup method for codec values/names.+- `mfmts-multibase` for converting data to/from multibase encodings.+- `mfmts-multihash` for identifing hash functions from multicodecs.+- `mfmts-cid` for encoding/decoding multiformat content idenitifiers.

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If not, see <https://www.gnu.org/licenses/>.++Also add information on how to contact you by electronic and paper mail.++  If your software can interact with users remotely through a computer+network, you should also make sure that it provides a way for users to+get its source.  For example, if your program is a web application, its+interface could display a "Source" link that leads users to an archive+of the code.  There are many ways you could offer source, and different+solutions will be better for different programs; see section 13 for the+specific requirements.++  You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU AGPL, see+<https://www.gnu.org/licenses/>.

@@ -0,0 +1,91 @@+mfmts+=====++This project contains my implementation of the [multiformats specifiation](+https://github.com/multiformats/multiformats) split across several individual+libraries.++`mfmts-multibase` - Multibase BaseSystems encoding + decoding+-------------------------------------------------------------++Implements encoders and decoders for numeric basesytems and mutliformats+specification for multibase prefix encoded strings.++#### *References:*+- Multibase GitHub - [https://github.com/multiformats/multibase](+https://github.com/multiformats/multibase)++`mfmts-varints` - Unsigned VarInts+----------------------------------++Provides parsing and serialization for multiformats unsigned binary varints.++#### *References:*+- Varint GitHub - [https://github.com/multiformats/unsigned-varint](+https://github.com/multiformats/unsigned-varint)++`mfmts-multicodec` - Magic Number specifications+------------------------------------------------++Provides lookup table and query functions for codecs defined from multiformats+multicodec. These are magic numbers that represent certain data encoded within+CIDs, mulithash and other related projects. This module uses a python script+to generate haskell code from the freshest `table.csv` on multicodec's GitHub.++#### *References:*+- Multicodec GitHub - [https://github.com/multiformats/multicodec](+https://github.com/multiformats/multicodec)+- Multicodec Table CSV - [+https://github.com/multiformats/multicodec/blob/master/table.csv](+https://github.com/multiformats/multicodec/blob/master/table.csv)++`mfmts-multihash` - Multicodec hash function identifiers+--------------------------------------------------------++Provides a lookup table for hash functions in the `mfmts-codec` table and+validates they have an implementation backend. This module is also used to+verify the Multihash's Multicodec as part of decoding ContentIDs.++#### *References:*+- Multihash GitHub - [+https://github.com/multiformats/multihash](+https://github.com/multiformats/multihash)+- Go implementation - [+https://github.com/multiformats/go-multihash/blob/master/multihash.go](+https://github.com/multiformats/go-multihash/blob/master/multihash.go)++`mfmts-cid` - CID/ContentID+---------------------------++Provides Parsing (from String), Extracting (from ByteString) and Serialization+(to ByteString) for ContentIDs/CIDs.++#### *References:*+- CID GitHub - [https://github.com/multiformats/cid](+https://github.com/multiformats/cid)+- Go implementation - [https://github.com/ipfs/go-cid](+https://github.com/ipfs/go-cid)++Unit testing+------------++Some modules in this directory have unit tests that are generated within the+python folder as JSON formats. Code for unit tests sets are found at the [main+ipfshs repo](https://git.sr.ht/~z0/ipfshs).++Reporting bugs+--------------++Report bugs to the ipfshs [ticket tracker](https://todo.sr.ht/~z0/ipfshs).+Please include a detailed description of your issue and steps or inputs to+reproduce it.++Licensing+---------++The `mfmts` project and its modules are free software and licensed under the+[AGPLv3](https://www.gnu.org/licenses/agpl-3.0.en.html) license. See+[LICENSE.txt](LICENSE.txt).++Copyright (C) 2026 Zoey McBride+<[zoeymcbride@mailbox.org](mailto:zoeymcbride@mailbox.org)>

@@ -0,0 +1,100 @@+-- | Module      : MultiFormats.CID+--   Description : Implements multiformats CID+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- This module provides a way for extracting, parsing and serializing CID data.+-- See: https://github.com/multiformats/cid+module MultiFormats.CID+  ( CID (CID),+    getDataCodec,+    getHashCodec,+    getHashDigest,+    getVersion,+  )+where++import Data.BaseSystem (encoder)+import Data.BaseSystems (base58btc)+import Data.Bifunctor (first)+import Data.ByteString (ByteString)+import Data.ByteString qualified as Bytes+import MultiFormats.CID.Errors+import MultiFormats.CID.Extractor+import MultiFormats.CID.Internal+import MultiFormats.CID.Internal.CIDDecoder+import MultiFormats.CID.Internal.CIDVersion+import MultiFormats.CID.Parser+import MultiFormats.CID.Serializer+import MultiFormats.MultiCodec (MultiCodec)+import MultiFormats.MultiHash (MultiHash)+import Text.Printf (printf)++-- | Wraps CIDData to implement multi-version Parser, Extractor & Serializer.+newtype CID = CID CIDData deriving (Eq)++-- | Repl/Unit test friendly Show.+instance Show CID where+  show cid =+    let version = getVersion cid+        datacodec = getDataCodec cid+        hashcodec = getHashCodec cid+        hashdigest = getHashDigest cid+     in printf+          "%s(DataCodec=%s, HashCodec=%s, HashDigest[%s]=%s)"+          (show version)+          (show datacodec)+          (show hashcodec)+          (show showbase)+          (encoder showbase hashdigest)+    where+      -- Sets the base implementation to show the hash digest with.+      showbase = base58btc++-- | Parses a CIDv1 from a MultiBase encoded string OR a CIDv0 from a base58btc+-- encoded string. Fails when there is extra bytes past the CID.+instance Parser CID where+  parser cidstr = do+    -- Decode to bytes based on the String's encoding.+    CIDDecoder cidbytes <- parser cidstr+    -- Extracts the CID's data from bytes.+    (cid, trailing) <- extractor cidbytes+    -- Fail if there is any leftovers.+    if Bytes.length trailing > 0+      then Left (InvalidData TrailingBytes)+      else Right cid++-- | Extracts a CID from a ByteString. Allows trailing bytes.+instance Extractor CID where+  extractor bytes = do+    -- First, extract the version from bytes+    (CIDVersion version, rest) <- extractor bytes+    -- Apply the constructor if the CID was successfully extracted from bytes+    first CID <$> case version of+      CIDv0 -> extractCIDv0 rest+      CIDv1 -> extractCIDv1 rest++-- | Serializes a CID from representation.+instance Serializer CID where+  serializer (CID ciddata) =+    case cidVersion ciddata of+      CIDv0 -> serializeCIDv0 ciddata+      CIDv1 -> serializeCIDv1 ciddata++-- | Gets VersionEnum from a CID.+getVersion :: CID -> VersionEnum+getVersion (CID ciddata) = cidVersion ciddata++-- | Gets data-type MultiCodec from a CID.+getDataCodec :: CID -> MultiCodec+getDataCodec (CID ciddata) = cidDataCodec ciddata++-- | Gets MultiHash codec from a CID.+getHashCodec :: CID -> MultiHash+getHashCodec (CID ciddata) = cidHashCodec ciddata++-- | Gets the hash digest from a CID.+getHashDigest :: CID -> ByteString+getHashDigest (CID ciddata) = cidHashDigest ciddata

@@ -0,0 +1,57 @@+-- | Module      : MultiFormats.CID.Errors+--   Description : Provides Errors for CIDs+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.CID.Errors+  ( Error (..),+    Okay,+    DataError (..),+    EncodingError (..),+    HashError (..),+  )+where++import MultiFormats.VarInt.Errors qualified as VarInt++-- | Functor for wrapping CID processing function's return values.+type Okay t = Either Error t++-- | Sums up everything that can go wrong in the CID modules.+data Error+  = InvalidData DataError+  | InvalidEncoding EncodingError+  | InvalidVarInt VarInt.Error+  | InvalidHash HashError+  deriving (Eq, Show)++-- | Errors with the CID itself, general/user caused errors.+data DataError+  = -- | When the total input is empty.+    EmptyCID+  | -- | When the Item's codec can't be resolved from the MultiCodec table.+    UnknownCodec+  | -- | When String data was processed, but has extra unaccounted bytes.+    TrailingBytes+  deriving (Eq, Show)++-- | Errors arrising from the decoding process.+data EncodingError+  = -- | When the leading byte indicates CIDv0 but is malformed.+    MalformedCIDv0+  | -- | When the CIDv1 is detected, but has an invalid leading codec.+    ExpectedCIDv1+  | -- | When the String encoding has an unknown/unimplemented prefix char.+    UnknownBasePrefix+  | -- | When the given string has an invalid character.+    ImproperDigit+  deriving (Eq, Show)++-- | Errors with the CID's MultiHash.+data HashError+  = -- | If the given hash codec isn't for a hash function.+    ExpectedHashCodec+  | -- | If the encoded hash length doesn't match the digest size.+    IncorrectLength+  deriving (Eq, Show)

@@ -0,0 +1,31 @@+-- | Module      : MultiFormats.CID.Extractor+--   Description : Provides extracting types for CID+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- This file provides a type-class `Extractor` for extracting CID data from a+-- ByteString. It also provides the type-alias `Extraction` for the function+-- signature of extracting valid data from the top of a ByteString.+module MultiFormats.CID.Extractor+  ( Extractor (extractor),+    Extraction,+  )+where++import Data.Bifunctor (Bifunctor (first))+import Data.ByteString (ByteString)+import MultiFormats.CID.Errors+import MultiFormats.VarInt (VarInt, extractVarInt)++-- | Extracts `a` from ByteString.+type Extraction a = ByteString -> Okay (a, ByteString)++-- | Generic function signature for extracting CID components.+class Extractor a where+  extractor :: Extraction a++-- | Extractor for VarInts in CID data. Converts VarInt.Error to CID.Error.+instance Extractor VarInt where+  extractor = first InvalidVarInt . extractVarInt

@@ -0,0 +1,107 @@+-- | Module      : MultiFormats.CID.Internal+--   Description : Internal implementation for CID+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- This file provides implemtations for serialization and extraction for+-- versioned CID data (when we know ahead-of-time to be CIDv0 or CIDv1).+module MultiFormats.CID.Internal+  ( CIDData (CIDData, cidVersion, cidDataCodec, cidHashCodec, cidHashDigest),++    -- * Extraction over CIDVersion+    extractCIDv1,+    extractCIDv0,++    -- * Serialization over CIDVersion+    serializeCIDv1,+    serializeCIDv0,++    -- * Constructs CIDv0 from ByteString+    mkCIDv0,+  )+where++import Data.Bifunctor (first)+import Data.ByteString (ByteString)+import Data.ByteString qualified as Bytes+import Data.Maybe (fromJust)+import MultiFormats.CID.Errors+import MultiFormats.CID.Extractor+import MultiFormats.CID.Internal.CIDCodec+import MultiFormats.CID.Internal.CIDHash+import MultiFormats.CID.Internal.CIDVersion+import MultiFormats.CID.Serializer+import MultiFormats.MultiCodec (MultiCodec, resolveCodecValue)+import MultiFormats.MultiHash (MultiHash, resolveHashName)+import MultiFormats.VarInt (VarInt)++-- | Define the CID as a constructor of CIDData+data CIDData = CIDData+  { -- | Specifies the version (CIDv0 or CIDv1) of this CID.+    cidVersion :: VersionEnum,+    -- | Describes the content type of the hashed data.+    cidDataCodec :: MultiCodec,+    -- | Contains the hash functoin used.+    cidHashCodec :: MultiHash,+    -- | Stores the hash function's output.+    cidHashDigest :: ByteString+  }+  deriving (Eq)++-- | Applies the extraction after version# for CIDv0 was extracted.+extractCIDv0 :: Extraction CIDData+extractCIDv0 ondata = first mkCIDv0 <$> splitDigestCIDv0 ondata+  where+    -- Get the hash digest from ByteString if there is enough bytes.+    splitDigestCIDv0 digest+      | Bytes.length digest < hashlen = Left (InvalidHash IncorrectLength)+      | otherwise = Right (Bytes.splitAt hashlen digest)+      where+        hashlen = cidv0HashLength++-- | Applies the extraction after version# for CIDv1 was extracted.+extractCIDv1 :: Extraction CIDData+extractCIDv1 oncodec = do+  -- Extract the 1st MultiCodec from the bytes.+  (CIDCodec multicodec, onhash) <- extractor oncodec+  -- Extract the 2nd MultiCodec and get CIDHash+  (CIDHash multihash hashdigest, stop) <- extractor onhash+  -- return the CIDv1 data with the trailing bytes.+  return (CIDData CIDv1 multicodec multihash hashdigest, stop)++-- | Serializes CIDv0 by adding the Codec Byte to its digest+serializeCIDv0 :: Serialization CIDData+serializeCIDv0 ciddata =+  return $ Bytes.cons cidv0Byte1st (cidHashDigest ciddata)++-- | Serializes CIDv1 into VarInts of its components.+serializeCIDv1 :: Serialization CIDData+serializeCIDv1 ciddata =+  let digest = cidHashDigest ciddata+      digestlength = Bytes.length digest+   in Bytes.concat+        <$> sequence+          [ serializer cidv1VarInt1st,+            serializer (cidDataCodec ciddata),+            serializer (cidHashCodec ciddata),+            serializer (fromIntegral digestlength :: VarInt),+            pure digest+          ]++-- | Provides the contructor for CIDv0s, see:+-- https://github.com/multiformats/cid?tab=readme-ov-file#cidv0+mkCIDv0 :: ByteString -> CIDData+mkCIDv0 digest =+  CIDData+    { cidVersion = CIDv0,+      cidDataCodec = codec "dag-pb",+      cidHashCodec = hash "sha2-256",+      cidHashDigest = digest+    }+  where+    -- Forces a resolve from MultiCodec+    codec str = fromJust $ resolveCodecValue str+    -- Forces a resolve from MultiHash+    hash str = fromJust $ resolveHashName str

@@ -0,0 +1,18 @@+-- | Module      : MultiFormats.CID.Internal.CIDCodec+--   Description : Implements extracting codecs from CIDs.+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.CID.Internal.CIDCodec (CIDCodec (CIDCodec)) where++import Data.Bifunctor (first)+import MultiFormats.CID.Extractor (Extractor (extractor))+import MultiFormats.MultiCodec (MultiCodec (MultiCodec))++-- | Represents a MultiCodec value embedded within CID data.+newtype CIDCodec = CIDCodec MultiCodec deriving (Eq)++-- | Extracts the MultiCodec from VarInt in bytes and wraps in CIDCodec.+instance Extractor CIDCodec where+  extractor bytes = first (CIDCodec . MultiCodec) <$> extractor bytes

@@ -0,0 +1,29 @@+-- | Module      : MultiFormats.CID.Internal.CIDDecoder+--   Description : Parses CID bytes from a multibase encoded string+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.CID.Internal.CIDDecoder (CIDDecoder (CIDDecoder)) where++import Data.ByteString (ByteString)+import MultiFormats.CID.Errors+import MultiFormats.CID.Internal.CIDVersion (isCIDv0Str)+import MultiFormats.CID.Parser+import MultiFormats.MultiBase (decodeCIDv0, decodeFromPrefix, hasValidPrefix)++-- | Implements decoding CID from String's base encoding.+newtype CIDDecoder = CIDDecoder ByteString++-- | Decodes a CID to bytes.+instance Parser CIDDecoder where+  parser str =+    let choosedecoder+          | null str = Left (InvalidData EmptyCID)+          | isCIDv0Str str = Right decodeCIDv0+          | hasValidPrefix str = Right decodeFromPrefix+          | otherwise = Left (InvalidEncoding UnknownBasePrefix)+     in choosedecoder >>= \decoder ->+          case decoder str of+            Nothing -> Left (InvalidEncoding ImproperDigit)+            Just bytes -> Right (CIDDecoder bytes)

@@ -0,0 +1,42 @@+-- | Module      : MultiFormats.CID.Internal.CIDHash+--   Description : Implements extraction and verification of multihash CID data+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.CID.Internal.CIDHash (CIDHash (CIDHash)) where++import Data.Bifunctor (first)+import Data.ByteString (ByteString)+import Data.ByteString qualified as Bytes+import MultiFormats.CID.Errors+import MultiFormats.CID.Extractor (Extractor (extractor))+import MultiFormats.CID.Internal.CIDCodec (CIDCodec (CIDCodec))+import MultiFormats.MultiHash (MultiHash, resolveHashCodec)+import MultiFormats.VarInt (VarInt)++data CIDHash = CIDHash+  { -- | Stores the MultiCodec for the hash function used.+    cidHashCodec :: MultiHash,+    -- | Stores the hash function's output.+    cidHashDigest :: ByteString+  }+  deriving (Eq)++-- | Extracts the MultiHash codec and hash digest via a varint size following+-- the MultiHash codec.+instance Extractor CIDHash where+  extractor bytes = do+    -- Get the CodecCode from the first varint+    (CIDCodec codec, onsize) <- extractor bytes+    -- Get the digest size from the first varint, make CID.Error if on Left+    (usize :: VarInt, rest) <- extractor onsize+    -- When codec is a valid hash and the given size is available in the bytes,+    -- take #size elements from bytes and construct the CIDHash+    case resolveHashCodec codec of+      Nothing -> Left (InvalidHash ExpectedHashCodec)+      Just hash+        | isize > Bytes.length rest -> Left (InvalidHash IncorrectLength)+        | otherwise -> Right (first (CIDHash hash) $ Bytes.splitAt isize rest)+        where+          isize = fromIntegral usize

@@ -0,0 +1,108 @@+-- | Module      : MultiFormats.CID.Internal.CIDVersion+--   Description : Implements extraction versioning from CID data.+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.CID.Internal.CIDVersion+  ( VersionEnum (CIDv0, CIDv1),+    CIDVersion (CIDVersion),++    -- * Extractions+    extractVersion0,+    extractVersion1,++    -- * Helper functions+    isCIDv0Str,++    -- * Constants+    cidv0Bytes,+    cidv0HashLength,+    cidv0Byte1st,+    cidv1VarInt1st,+  )+where++import Data.Bifunctor (Bifunctor (first))+import Data.ByteString qualified as Bytes+import Data.Word (Word8)+import MultiFormats.CID.Errors+import MultiFormats.CID.Extractor (Extraction, Extractor (extractor))+import MultiFormats.VarInt (VarInt)++-- | Implements available CID versions.+data VersionEnum = CIDv0 | CIDv1 deriving (Show, Eq, Enum)++-- | Wraps Version type to implement Extractor.+newtype CIDVersion = CIDVersion VersionEnum deriving (Eq)++-- | Extracts and validates the CID versioning information from bytes.+instance Extractor CIDVersion where+  extractor cidbytes =+    case Bytes.uncons cidbytes of+      Nothing -> Left (InvalidData EmptyCID)+      -- Only CIDv0 will start with 0x12, and it must be followed w/ a+      -- special byte; if it doesn't have both, the encoding is invalid.+      Just (0x12, _) -> first CIDVersion <$> extractVersion0 cidbytes+      -- Without the magic bytes, CIDvX > CIDv0 is done in VarInts, so we get+      -- the Version information from the first varint (0x1 for CIDv1).+      Just _VarInt -> first CIDVersion <$> extractVersion1 cidbytes++-- | Performs extraction for CIDv1.+extractVersion1 :: Extraction VersionEnum+extractVersion1 bytes =+  extractor bytes >>= \(varint1, rest) ->+    if invalidCIDv1 varint1+      then Left (InvalidEncoding ExpectedCIDv1)+      else Right (CIDv1, rest)+  where+    invalidCIDv1 v1 = v1 /= cidv1VarInt1st++-- | Performs extraction for CIDv0.+extractVersion0 :: Extraction VersionEnum+extractVersion0 bytes =+  let (lead, rest) = Bytes.splitAt 2 bytes+   in case Bytes.unpack lead of+        [b1, b2]+          | invalidCIDv0 b1 b2 -> Left (InvalidEncoding MalformedCIDv0)+          | otherwise -> Right (CIDv0, rest)+        _Not2 -> Left (InvalidEncoding MalformedCIDv0)+  where+    invalidCIDv0 b1 b2 =+      b1 /= cidv0Byte1st+        || b2 /= cidv0Byte2nd+        || Bytes.length bytes /= cidv0Bytes++-- | This prefixes a CIDv0 instead of a multibase prefix.+cidv0StringPrefix :: String+cidv0StringPrefix = "Qm"++-- | The length of a CIDv0 string, base58 encoded.+cidv0StringLength :: Int+cidv0StringLength = 46++-- | Required length in bytes of all CIDv0 encodings.+cidv0Bytes :: Int+cidv0Bytes = 34++-- | Length of hash digest in CIDv0, ie the length without its versioning+-- information, since those are the only items in CIDv0.+cidv0HashLength :: Int+cidv0HashLength = cidv0Bytes - 2++-- | Required first byte of all CIDv0 encodings.+cidv0Byte1st :: Word8+cidv0Byte1st = 0x12++-- | Required second byte of all CIDv0 encodings.+cidv0Byte2nd :: Word8+cidv0Byte2nd = 0x20++-- | Required first VarInt of all CIDv1 encodings.+cidv1VarInt1st :: VarInt+cidv1VarInt1st = 1++-- | Checks if a string meets CIDv0 criteria.+isCIDv0Str :: String -> Bool+isCIDv0Str str =+  take 2 str == cidv0StringPrefix && length str == cidv0StringLength

@@ -0,0 +1,20 @@+-- | Module      : MultiFormats.CID.Parser+--   Description : Provides parsing types for CID+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- This file provides a type-class `Parser` for parsing CID data from a+-- multibase encoded string. It also provides the type-alias `ParseMethod` for+-- the function signature Parsing some type a from String.+module MultiFormats.CID.Parser (Parser (parser), ParseMethod) where++import MultiFormats.CID.Errors (Okay)++-- | Function signature for parsing a String into some `a`.+type ParseMethod a = String -> Okay a++-- | Generic function signature for parsing CID components from Strings.+class Parser a where+  parser :: ParseMethod a

@@ -0,0 +1,41 @@+-- | Module      : MultiFormats.CID.Serializer+--   Description : Provides serialization types for CID+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- This file provides a type-class `Serializer` for serializing CID data to+-- ByteString. It also provides the type-alias `Serialization` for the function+-- signature of some serialization over type a.+module MultiFormats.CID.Serializer+  ( Serialization,+    Serializer (serializer),+  )+where++import Data.Bifunctor (Bifunctor (first))+import Data.ByteString (ByteString)+import MultiFormats.CID.Errors+import MultiFormats.MultiCodec (MultiCodec, multiCodecValue)+import MultiFormats.MultiHash (MultiHash, multiHashCodec)+import MultiFormats.VarInt (VarInt, serializeVarInt)++-- | Represents a function that implements serialization.+type Serialization a = a -> Okay ByteString++-- | Generic function signature for serializing CID components.+class Serializer a where+  serializer :: Serialization a++-- | Serializer for VarInts in CID data. Converts VarInt.Error to CID.Error.+instance Serializer VarInt where+  serializer = first InvalidVarInt . serializeVarInt++-- | Composes with Serializer VarInt.+instance Serializer MultiCodec where+  serializer = serializer . multiCodecValue++-- | Composes with Serializer MultiCodec.+instance Serializer MultiHash where+  serializer = serializer . multiHashCodec

@@ -0,0 +1,138 @@+cabal-version:   3.0+version:         1.0.0.0+name:            mfmts+build-type:      Simple+author:          Zoey McBride+maintainer:      zoeymcbride@mailbox.org+license:         AGPL-3.0-or-later+license-file:    LICENSE.txt+extra-doc-files: README.md, CHANGE_LOG.md+category:        Hash, Codec, Protocol+synopsis:        Implements multiformats specification+description:+    Implments the multiformats specification used in IPFS and other distributed+    systems.++source-repository head+  type:     git+  location: https://git.sr.ht/~z0/mfmts++-- | Base language settings. Imported for all libraries.+common haskell-settings+    default-language: GHC2021+    default-extensions: StrictData+    ghc-options: -Wall -Wextra -Wno-unused-top-binds++-- | Packages everything into a single library for distribution.+library+    import: haskell-settings+    hs-source-dirs:+        cid+        multibase+        multicodec+        multihash+        varint+    exposed-modules:+        MultiFormats.VarInt,+        MultiFormats.VarInt.Errors,+        MultiFormats.MultiCodec,+        MultiFormats.MultiBase,+        MultiFormats.MultiBaseSystems,+        MultiFormats.MultiHash,+        MultiFormats.CID,+        MultiFormats.CID.Errors,+        MultiFormats.CID.Serializer,+        MultiFormats.CID.Extractor,+        MultiFormats.CID.Parser,+        MultiFormats.CID.Internal,+        MultiFormats.CID.Internal.CIDCodec,+        MultiFormats.CID.Internal.CIDDecoder,+        MultiFormats.CID.Internal.CIDHash,+        MultiFormats.CID.Internal.CIDVersion,+    build-depends:+        array >= 0.5.8 && < 0.6,+        base >= 4.18.3 && < 4.19,+        basesystems >= 1.0.0 && < 1.1,+        bytestring >= 0.11.5 && < 0.12,+        containers >= 0.6.7 && < 0.7,+        text >= 1.2.5 && < 1.3,+        crypton >= 1.0.6 && < 1.1,+        memory >= 0.18.0 && < 0.19,+++-- | Implements unsigned variable length integers.+library mfmts-varint+    import: haskell-settings+    hs-source-dirs: varint+    exposed-modules:+        MultiFormats.VarInt,+        MultiFormats.VarInt.Errors,+    build-depends:+        base >= 4.18.3 && < 4.19,+        bytestring >= 0.11.5 && < 0.12,+        containers >= 0.6.7 && < 0.7,++-- | Lookup table for MultiCodecs. Generated from Python.+library mfmts-multicodec+    import: haskell-settings+    hs-source-dirs: multicodec+    exposed-modules:+        MultiFormats.MultiCodec,+    build-depends:+        base >= 4.18.3 && < 4.19,+        bytestring >= 0.11.5 && < 0.12,+        containers >= 0.6.7 && < 0.7,+        mfmts-varint++-- | Encode/decode mutibase strings with identifying prefix.+library mfmts-multibase+    import: haskell-settings+    hs-source-dirs: multibase+    exposed-modules:+        MultiFormats.MultiBase,+        MultiFormats.MultiBaseSystems,+    build-depends:+        base >= 4.18.3 && < 4.19,+        array >= 0.5.8 && < 0.6,+        bytestring >= 0.11.5 && < 0.12,+        containers >= 0.6.7 && < 0.7,+        text >= 1.2.5 && < 1.3,+        basesystems >= 1.0.0 && < 1.1,++-- | Associates MultiCodecs for hash functions with implementations.+library mfmts-multihash+    import: haskell-settings+    hs-source-dirs: multihash+    exposed-modules:+        MultiFormats.MultiHash,+    build-depends:+        base >= 4.18.3 && < 4.19,+        bytestring >= 0.11.5 && < 0.12,+        containers >= 0.6.7 && < 0.7,+        crypton >= 1.0.6 && < 1.1,+        memory >= 0.18.0 && < 0.19,+        mfmts-multicodec++-- | Modules for reading/writing CIDs.+library mfmts-cid+    import: haskell-settings+    hs-source-dirs: cid+    exposed-modules:+        MultiFormats.CID,+        MultiFormats.CID.Errors,+        MultiFormats.CID.Serializer,+        MultiFormats.CID.Extractor,+        MultiFormats.CID.Parser,+        MultiFormats.CID.Internal,+        MultiFormats.CID.Internal.CIDCodec,+        MultiFormats.CID.Internal.CIDDecoder,+        MultiFormats.CID.Internal.CIDHash,+        MultiFormats.CID.Internal.CIDVersion,+    build-depends:+        base >= 4.18.3 && < 4.19,+        bytestring >= 0.11.5 && < 0.12,+        basesystems >= 1.0.0 && < 1.1,+        mfmts-multibase,+        mfmts-multihash,+        mfmts-multicodec,+        mfmts-varint,

@@ -0,0 +1,108 @@+-- | Module      : MultiFormats.MultiBase+--   Description : Functions for working with multibase data.+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.MultiBase+  ( MultiBase (prefixChar, baseEncoder, baseDecoder),+    mkMultiBase,++    -- * Decoders+    decodeFromPrefix,+    decodeCIDv0,++    -- * Query functions for MultiBase information+    hasValidPrefix,+    resolvePrefix,+    resolveMultiBase,+  )+where++import Data.BaseSystem (BaseSystem, Decoder, Encoder)+import Data.BaseSystem qualified as Bases+import Data.BaseSystems qualified as Bases+import Data.Function (on)+import Data.List (uncons)+import Data.Map.Strict qualified as Map+import Data.Maybe (isJust)+import Text.Printf (printf)++data MultiBase = MultiBase+  { prefixChar :: Char,+    baseEncoder :: Encoder,+    baseDecoder :: Decoder,+    baseName :: String+  }++instance Eq MultiBase where+  (==) = (==) `on` prefixChar++instance Ord MultiBase where+  compare = compare `on` prefixChar++instance Show MultiBase where+  show mb = printf "multi%s('%c')" (baseName mb) (prefixChar mb)++-- | Implements encoder/decoder for multibase systems when the prefix is known+-- ahead of time.+instance BaseSystem MultiBase where+  encoder mb bytes = prefixChar mb : baseEncoder mb bytes+  decoder _ = decodeFromPrefix++-- | Constructs a Multibase from a BaseSystem.+mkMultiBase :: (Show b, BaseSystem b) => b -> Char -> MultiBase+mkMultiBase bs prefix =+  MultiBase+    { prefixChar = prefix,+      baseEncoder = Bases.encoder bs,+      baseDecoder = Bases.decoder bs,+      baseName = show bs+    }++-- | Resolves a MultiBase system from a Char.+resolvePrefix :: Char -> Maybe MultiBase+resolvePrefix prefix = Map.lookup prefix prefixTable <*> pure prefix+  where+    -- https://github.com/multiformats/multibase/blob/master/multibase.csv+    prefixTable =+      Map.fromList+        [ ('0', mkMultiBase Bases.base2),+          ('9', mkMultiBase Bases.base10),+          ('f', mkMultiBase Bases.base16lower),+          ('F', mkMultiBase Bases.base16upper),+          ('b', mkMultiBase Bases.base32lowerNP),+          ('B', mkMultiBase Bases.base32upperNP),+          ('c', mkMultiBase Bases.base32lower),+          ('C', mkMultiBase Bases.base32upper),+          ('v', mkMultiBase Bases.base32hexlowerNP),+          ('V', mkMultiBase Bases.base32hexupperNP),+          ('t', mkMultiBase Bases.base32hexlower),+          ('T', mkMultiBase Bases.base32hexupper),+          ('z', mkMultiBase Bases.base58btc),+          ('m', mkMultiBase Bases.base64NP),+          ('M', mkMultiBase Bases.base64),+          ('u', mkMultiBase Bases.base64urlNP),+          ('U', mkMultiBase Bases.base64url)+        ]++-- | Resolves a MultiBase system from the first Char in a String.+resolveMultiBase :: String -> Maybe MultiBase+resolveMultiBase str = uncons str >>= \(ch, _) -> resolvePrefix ch++-- | Checks if a given char is an implemented MultiBase prefix.+hasValidPrefix :: String -> Bool+hasValidPrefix [] = False+hasValidPrefix (prefix : _) = isJust $ resolvePrefix prefix++-- | Provides decoder for MultiBase strings with any implemented prefix+-- character.+decodeFromPrefix :: Decoder+decodeFromPrefix str =+  uncons str >>= \(prefix, rest) -> do+    decode <- baseDecoder <$> resolvePrefix prefix+    decode rest++-- | Decodes for CIDv0 from base58btc w/o MultiBase prefix.+decodeCIDv0 :: Decoder+decodeCIDv0 = Bases.decoder Bases.base58btc

@@ -0,0 +1,102 @@+-- | Module      : MultiFormats.MultiBaseSystems+--   Description : Provides default instances of multibase+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.MultiBaseSystems+  ( base2,+    base10,+    base16lower,+    base16upper,+    base32lower,+    base32lowerNP,+    base32upper,+    base32upperNP,+    base32hexlower,+    base32hexlowerNP,+    base32hexupper,+    base32hexupperNP,+    base58btc,+    base64,+    base64NP,+    base64url,+    base64urlNP,+  )+where++import Data.Maybe (fromJust)+import MultiFormats.MultiBase++-- | Unwraps Maybe from multibaseSystems lookup for implementing MultiBase from+-- Char.+multibasePrefix :: Char -> MultiBase+multibasePrefix = fromJust . resolvePrefix++-- | Binary has prefix '0'.+base2 :: MultiBase+base2 = multibasePrefix '0'++-- | Decimal has prefix '9'.+base10 :: MultiBase+base10 = multibasePrefix '9'++-- | Hex-lower has prefix 'f'.+base16lower :: MultiBase+base16lower = multibasePrefix 'f'++-- | Hex-upper has prefix 'F'.+base16upper :: MultiBase+base16upper = multibasePrefix 'F'++-- | base32lower (no pad) has prefix 'b'.+base32lowerNP :: MultiBase+base32lowerNP = multibasePrefix 'b'++-- | base32uppper (no pad) has prefix 'B'.+base32upperNP :: MultiBase+base32upperNP = multibasePrefix 'B'++-- | base32lower (with pad) has prefix 'c'.+base32lower :: MultiBase+base32lower = multibasePrefix 'c'++-- | base32upper (with pad) has prefix 'C'.+base32upper :: MultiBase+base32upper = multibasePrefix 'C'++-- | Hex-base32lower (no pad) has prefix 'v'.+base32hexlowerNP :: MultiBase+base32hexlowerNP = multibasePrefix 'v'++-- | Hex-base32upper (no pad) has prefix 'V'.+base32hexupperNP :: MultiBase+base32hexupperNP = multibasePrefix 'V'++-- | Hex-base32lower (with pad) has prefix 't'.+base32hexlower :: MultiBase+base32hexlower = multibasePrefix 't'++-- | Hex-base32upper (with pad) has prefix 'T'.+base32hexupper :: MultiBase+base32hexupper = multibasePrefix 'T'++-- | Bitcoin base58 has prefix 'z'.+base58btc :: MultiBase+base58btc = multibasePrefix 'z'++-- | base64 (no pad) has prefix 'm'.+base64NP :: MultiBase+base64NP = multibasePrefix 'm'++-- | base64 (with pad) has prefix 'M'.+base64 :: MultiBase+base64 = multibasePrefix 'M'++-- | base64url (no pad) has prefix 'u'.+base64urlNP :: MultiBase+base64urlNP = multibasePrefix 'u'++-- | base64url (with pad) has prefix 'U'.+base64url :: MultiBase+base64url = multibasePrefix 'U'

@@ -0,0 +1,1299 @@+-- | Module      : MultiFormats.MultiCodec+--   Description : Implements lookup table for multicodecs+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- Provides a lookup table for multicodec values and names. This file is+-- generated automatically by `python/MultiCodec/generate_module.py` and was+-- last updated on <DATE>.+module MultiFormats.MultiCodec+  ( MultiCodec (MultiCodec, multiCodecValue),+    resolveCodecValue,+    resolveCodecName,+    gitCommitHash,+    gitCommitDate,+  )+where++import Data.Map (Map)+import Data.Map qualified as LazyMap+import Data.Maybe (fromMaybe)+import MultiFormats.VarInt (VarInt)++-- | Represents MultiCodec code.+newtype MultiCodec = MultiCodec {multiCodecValue :: VarInt} deriving (Eq, Ord)++instance Show MultiCodec where+  show codec = fromMaybe "<invalid codec>" $ resolveCodecName codec++-- | Resolves MultiCodec code from its string name.+resolveCodecValue :: String -> Maybe MultiCodec+resolveCodecValue name = MultiCodec <$> LazyMap.lookup name nameToCodec++-- | Resolves MultiCodec name from its numeric code.+resolveCodecName :: MultiCodec -> Maybe String+resolveCodecName (MultiCodec codec) = LazyMap.lookup codec codecToName++-- | The git hash for table.csv used to generate this file.+gitCommitHash :: String+gitCommitHash = "8167547c160b7904b755b9a7eef7c391e90552e4"++-- | This is the date the table.csv was commited.+gitCommitDate :: String+gitCommitDate = "2026-02-13 15:12:08 +0100"++nameToCodec :: Map String VarInt+nameToCodec =+  LazyMap.fromList+    [ ("identity", 0x00),+      ("cidv1", 0x01),+      ("cidv2", 0x02),+      ("cidv3", 0x03),+      ("ip4", 0x04),+      ("tcp", 0x06),+      ("sha1", 0x11),+      ("sha2-256", 0x12),+      ("sha2-512", 0x13),+      ("sha3-512", 0x14),+      ("sha3-384", 0x15),+      ("sha3-256", 0x16),+      ("sha3-224", 0x17),+      ("shake-128", 0x18),+      ("shake-256", 0x19),+      ("keccak-224", 0x1a),+      ("keccak-256", 0x1b),+      ("keccak-384", 0x1c),+      ("keccak-512", 0x1d),+      ("blake3", 0x1e),+      ("sha2-384", 0x20),+      ("dccp", 0x21),+      ("murmur3-x64-64", 0x22),+      ("murmur3-32", 0x23),+      ("ip6", 0x29),+      ("ip6zone", 0x2a),+      ("ipcidr", 0x2b),+      ("path", 0x2f),+      ("multicodec", 0x30),+      ("multihash", 0x31),+      ("multiaddr", 0x32),+      ("multibase", 0x33),+      ("varsig", 0x34),+      ("dns", 0x35),+      ("dns4", 0x36),+      ("dns6", 0x37),+      ("dnsaddr", 0x38),+      ("protobuf", 0x50),+      ("cbor", 0x51),+      ("raw", 0x55),+      ("dbl-sha2-256", 0x56),+      ("rlp", 0x60),+      ("bencode", 0x63),+      ("dag-pb", 0x70),+      ("dag-cbor", 0x71),+      ("libp2p-key", 0x72),+      ("git-raw", 0x78),+      ("torrent-info", 0x7b),+      ("torrent-file", 0x7c),+      ("blake3-hashseq", 0x80),+      ("leofcoin-block", 0x81),+      ("leofcoin-tx", 0x82),+      ("leofcoin-pr", 0x83),+      ("sctp", 0x84),+      ("dag-jose", 0x85),+      ("dag-cose", 0x86),+      ("lbry", 0x8c),+      ("eth-block", 0x90),+      ("eth-block-list", 0x91),+      ("eth-tx-trie", 0x92),+      ("eth-tx", 0x93),+      ("eth-tx-receipt-trie", 0x94),+      ("eth-tx-receipt", 0x95),+      ("eth-state-trie", 0x96),+      ("eth-account-snapshot", 0x97),+      ("eth-storage-trie", 0x98),+      ("eth-receipt-log-trie", 0x99),+      ("eth-receipt-log", 0x9a),+      ("aes-128", 0xa0),+      ("aes-192", 0xa1),+      ("aes-256", 0xa2),+      ("chacha-128", 0xa3),+      ("chacha-256", 0xa4),+      ("bitcoin-block", 0xb0),+      ("bitcoin-tx", 0xb1),+      ("bitcoin-witness-commitment", 0xb2),+      ("zcash-block", 0xc0),+      ("zcash-tx", 0xc1),+      ("caip-50", 0xca),+      ("streamid", 0xce),+      ("stellar-block", 0xd0),+      ("stellar-tx", 0xd1),+      ("md4", 0xd4),+      ("md5", 0xd5),+      ("decred-block", 0xe0),+      ("decred-tx", 0xe1),+      ("ipld", 0xe2),+      ("ipfs", 0xe3),+      ("swarm", 0xe4),+      ("ipns", 0xe5),+      ("zeronet", 0xe6),+      ("secp256k1-pub", 0xe7),+      ("dnslink", 0xe8),+      ("bls12_381-g1-pub", 0xea),+      ("bls12_381-g2-pub", 0xeb),+      ("x25519-pub", 0xec),+      ("ed25519-pub", 0xed),+      ("bls12_381-g1g2-pub", 0xee),+      ("sr25519-pub", 0xef),+      ("dash-block", 0xf0),+      ("dash-tx", 0xf1),+      ("swarm-manifest", 0xfa),+      ("swarm-feed", 0xfb),+      ("beeson", 0xfc),+      ("udp", 0x0111),+      ("webrtc-direct", 0x0118),+      ("webrtc", 0x0119),+      ("p2p-circuit", 0x0122),+      ("dag-json", 0x0129),+      ("udt", 0x012d),+      ("utp", 0x012e),+      ("crc32", 0x0132),+      ("crc64-ecma", 0x0164),+      ("crc64-nvme", 0x0165),+      ("unix", 0x0190),+      ("thread", 0x0196),+      ("p2p", 0x01a5),+      ("https", 0x01bb),+      ("onion", 0x01bc),+      ("onion3", 0x01bd),+      ("garlic64", 0x01be),+      ("garlic32", 0x01bf),+      ("tls", 0x01c0),+      ("sni", 0x01c1),+      ("noise", 0x01c6),+      ("shs", 0x01c8),+      ("quic", 0x01cc),+      ("quic-v1", 0x01cd),+      ("webtransport", 0x01d1),+      ("certhash", 0x01d2),+      ("ws", 0x01dd),+      ("wss", 0x01de),+      ("p2p-websocket-star", 0x01df),+      ("http", 0x01e0),+      ("http-path", 0x01e1),+      ("swhid-1-snp", 0x01f0),+      ("json", 0x0200),+      ("messagepack", 0x0201),+      ("car", 0x0202),+      ("x509-certificate", 0x0210),+      ("ipns-record", 0x0300),+      ("libp2p-peer-record", 0x0301),+      ("libp2p-relay-rsvp", 0x0302),+      ("memorytransport", 0x0309),+      ("car-index-sorted", 0x0400),+      ("car-multihash-index-sorted", 0x0401),+      ("transport-bitswap", 0x0900),+      ("transport-graphsync-filecoinv1", 0x0910),+      ("transport-ipfs-gateway-http", 0x0920),+      ("transport-filecoin-piece-http", 0x0930),+      ("multidid", 0x0d1d),+      ("fr32-sha256-trunc254-padbintree", 0x1011),+      ("sha2-256-trunc254-padded", 0x1012),+      ("sha2-224", 0x1013),+      ("sha2-512-224", 0x1014),+      ("sha2-512-256", 0x1015),+      ("murmur3-x64-128", 0x1022),+      ("ripemd-128", 0x1052),+      ("ripemd-160", 0x1053),+      ("ripemd-256", 0x1054),+      ("ripemd-320", 0x1055),+      ("x11", 0x1100),+      ("p256-pub", 0x1200),+      ("p384-pub", 0x1201),+      ("p521-pub", 0x1202),+      ("ed448-pub", 0x1203),+      ("x448-pub", 0x1204),+      ("rsa-pub", 0x1205),+      ("sm2-pub", 0x1206),+      ("vlad", 0x1207),+      ("provenance-log", 0x1208),+      ("provenance-log-entry", 0x1209),+      ("provenance-log-script", 0x120a),+      ("mlkem-512-pub", 0x120b),+      ("mlkem-768-pub", 0x120c),+      ("mlkem-1024-pub", 0x120d),+      ("mldsa-44-pub", 0x1210),+      ("mldsa-65-pub", 0x1211),+      ("mldsa-87-pub", 0x1212),+      ("slhdsa-sha2-128s-pub", 0x1220),+      ("slhdsa-shake-128s-pub", 0x1221),+      ("slhdsa-sha2-128f-pub", 0x1222),+      ("slhdsa-shake-128f-pub", 0x1223),+      ("slhdsa-sha2-192s-pub", 0x1224),+      ("slhdsa-shake-192s-pub", 0x1225),+      ("slhdsa-sha2-192f-pub", 0x1226),+      ("slhdsa-shake-192f-pub", 0x1227),+      ("slhdsa-sha2-256s-pub", 0x1228),+      ("slhdsa-shake-256s-pub", 0x1229),+      ("slhdsa-sha2-256f-pub", 0x122a),+      ("slhdsa-shake-256f-pub", 0x122b),+      ("multisig", 0x1239),+      ("multikey", 0x123a),+      ("nonce", 0x123b),+      ("ed25519-priv", 0x1300),+      ("secp256k1-priv", 0x1301),+      ("x25519-priv", 0x1302),+      ("sr25519-priv", 0x1303),+      ("rsa-priv", 0x1305),+      ("p256-priv", 0x1306),+      ("p384-priv", 0x1307),+      ("p521-priv", 0x1308),+      ("bls12_381-g1-priv", 0x1309),+      ("bls12_381-g2-priv", 0x130a),+      ("bls12_381-g1g2-priv", 0x130b),+      ("bls12_381-g1-pub-share", 0x130c),+      ("bls12_381-g2-pub-share", 0x130d),+      ("bls12_381-g1-priv-share", 0x130e),+      ("bls12_381-g2-priv-share", 0x130f),+      ("sm2-priv", 0x1310),+      ("ed448-priv", 0x1311),+      ("x448-priv", 0x1312),+      ("mlkem-512-priv", 0x1313),+      ("mlkem-768-priv", 0x1314),+      ("mlkem-1024-priv", 0x1315),+      ("jwk_jcs-priv", 0x1316),+      ("lamport-sha3-512-pub", 0x1a14),+      ("lamport-sha3-384-pub", 0x1a15),+      ("lamport-sha3-256-pub", 0x1a16),+      ("lamport-sha3-512-priv", 0x1a24),+      ("lamport-sha3-384-priv", 0x1a25),+      ("lamport-sha3-256-priv", 0x1a26),+      ("lamport-sha3-512-priv-share", 0x1a34),+      ("lamport-sha3-384-priv-share", 0x1a35),+      ("lamport-sha3-256-priv-share", 0x1a36),+      ("lamport-sha3-512-sig", 0x1a44),+      ("lamport-sha3-384-sig", 0x1a45),+      ("lamport-sha3-256-sig", 0x1a46),+      ("lamport-sha3-512-sig-share", 0x1a54),+      ("lamport-sha3-384-sig-share", 0x1a55),+      ("lamport-sha3-256-sig-share", 0x1a56),+      ("kangarootwelve", 0x1d01),+      ("aes-gcm-256", 0x2000),+      ("silverpine", 0x3f42),+      ("sm3-256", 0x534d),+      ("sha256a", 0x7012),+      ("chacha20-poly1305", 0xa000),+      ("blake2b-8", 0xb201),+      ("blake2b-16", 0xb202),+      ("blake2b-24", 0xb203),+      ("blake2b-32", 0xb204),+      ("blake2b-40", 0xb205),+      ("blake2b-48", 0xb206),+      ("blake2b-56", 0xb207),+      ("blake2b-64", 0xb208),+      ("blake2b-72", 0xb209),+      ("blake2b-80", 0xb20a),+      ("blake2b-88", 0xb20b),+      ("blake2b-96", 0xb20c),+      ("blake2b-104", 0xb20d),+      ("blake2b-112", 0xb20e),+      ("blake2b-120", 0xb20f),+      ("blake2b-128", 0xb210),+      ("blake2b-136", 0xb211),+      ("blake2b-144", 0xb212),+      ("blake2b-152", 0xb213),+      ("blake2b-160", 0xb214),+      ("blake2b-168", 0xb215),+      ("blake2b-176", 0xb216),+      ("blake2b-184", 0xb217),+      ("blake2b-192", 0xb218),+      ("blake2b-200", 0xb219),+      ("blake2b-208", 0xb21a),+      ("blake2b-216", 0xb21b),+      ("blake2b-224", 0xb21c),+      ("blake2b-232", 0xb21d),+      ("blake2b-240", 0xb21e),+      ("blake2b-248", 0xb21f),+      ("blake2b-256", 0xb220),+      ("blake2b-264", 0xb221),+      ("blake2b-272", 0xb222),+      ("blake2b-280", 0xb223),+      ("blake2b-288", 0xb224),+      ("blake2b-296", 0xb225),+      ("blake2b-304", 0xb226),+      ("blake2b-312", 0xb227),+      ("blake2b-320", 0xb228),+      ("blake2b-328", 0xb229),+      ("blake2b-336", 0xb22a),+      ("blake2b-344", 0xb22b),+      ("blake2b-352", 0xb22c),+      ("blake2b-360", 0xb22d),+      ("blake2b-368", 0xb22e),+      ("blake2b-376", 0xb22f),+      ("blake2b-384", 0xb230),+      ("blake2b-392", 0xb231),+      ("blake2b-400", 0xb232),+      ("blake2b-408", 0xb233),+      ("blake2b-416", 0xb234),+      ("blake2b-424", 0xb235),+      ("blake2b-432", 0xb236),+      ("blake2b-440", 0xb237),+      ("blake2b-448", 0xb238),+      ("blake2b-456", 0xb239),+      ("blake2b-464", 0xb23a),+      ("blake2b-472", 0xb23b),+      ("blake2b-480", 0xb23c),+      ("blake2b-488", 0xb23d),+      ("blake2b-496", 0xb23e),+      ("blake2b-504", 0xb23f),+      ("blake2b-512", 0xb240),+      ("blake2s-8", 0xb241),+      ("blake2s-16", 0xb242),+      ("blake2s-24", 0xb243),+      ("blake2s-32", 0xb244),+      ("blake2s-40", 0xb245),+      ("blake2s-48", 0xb246),+      ("blake2s-56", 0xb247),+      ("blake2s-64", 0xb248),+      ("blake2s-72", 0xb249),+      ("blake2s-80", 0xb24a),+      ("blake2s-88", 0xb24b),+      ("blake2s-96", 0xb24c),+      ("blake2s-104", 0xb24d),+      ("blake2s-112", 0xb24e),+      ("blake2s-120", 0xb24f),+      ("blake2s-128", 0xb250),+      ("blake2s-136", 0xb251),+      ("blake2s-144", 0xb252),+      ("blake2s-152", 0xb253),+      ("blake2s-160", 0xb254),+      ("blake2s-168", 0xb255),+      ("blake2s-176", 0xb256),+      ("blake2s-184", 0xb257),+      ("blake2s-192", 0xb258),+      ("blake2s-200", 0xb259),+      ("blake2s-208", 0xb25a),+      ("blake2s-216", 0xb25b),+      ("blake2s-224", 0xb25c),+      ("blake2s-232", 0xb25d),+      ("blake2s-240", 0xb25e),+      ("blake2s-248", 0xb25f),+      ("blake2s-256", 0xb260),+      ("skein256-8", 0xb301),+      ("skein256-16", 0xb302),+      ("skein256-24", 0xb303),+      ("skein256-32", 0xb304),+      ("skein256-40", 0xb305),+      ("skein256-48", 0xb306),+      ("skein256-56", 0xb307),+      ("skein256-64", 0xb308),+      ("skein256-72", 0xb309),+      ("skein256-80", 0xb30a),+      ("skein256-88", 0xb30b),+      ("skein256-96", 0xb30c),+      ("skein256-104", 0xb30d),+      ("skein256-112", 0xb30e),+      ("skein256-120", 0xb30f),+      ("skein256-128", 0xb310),+      ("skein256-136", 0xb311),+      ("skein256-144", 0xb312),+      ("skein256-152", 0xb313),+      ("skein256-160", 0xb314),+      ("skein256-168", 0xb315),+      ("skein256-176", 0xb316),+      ("skein256-184", 0xb317),+      ("skein256-192", 0xb318),+      ("skein256-200", 0xb319),+      ("skein256-208", 0xb31a),+      ("skein256-216", 0xb31b),+      ("skein256-224", 0xb31c),+      ("skein256-232", 0xb31d),+      ("skein256-240", 0xb31e),+      ("skein256-248", 0xb31f),+      ("skein256-256", 0xb320),+      ("skein512-8", 0xb321),+      ("skein512-16", 0xb322),+      ("skein512-24", 0xb323),+      ("skein512-32", 0xb324),+      ("skein512-40", 0xb325),+      ("skein512-48", 0xb326),+      ("skein512-56", 0xb327),+      ("skein512-64", 0xb328),+      ("skein512-72", 0xb329),+      ("skein512-80", 0xb32a),+      ("skein512-88", 0xb32b),+      ("skein512-96", 0xb32c),+      ("skein512-104", 0xb32d),+      ("skein512-112", 0xb32e),+      ("skein512-120", 0xb32f),+      ("skein512-128", 0xb330),+      ("skein512-136", 0xb331),+      ("skein512-144", 0xb332),+      ("skein512-152", 0xb333),+      ("skein512-160", 0xb334),+      ("skein512-168", 0xb335),+      ("skein512-176", 0xb336),+      ("skein512-184", 0xb337),+      ("skein512-192", 0xb338),+      ("skein512-200", 0xb339),+      ("skein512-208", 0xb33a),+      ("skein512-216", 0xb33b),+      ("skein512-224", 0xb33c),+      ("skein512-232", 0xb33d),+      ("skein512-240", 0xb33e),+      ("skein512-248", 0xb33f),+      ("skein512-256", 0xb340),+      ("skein512-264", 0xb341),+      ("skein512-272", 0xb342),+      ("skein512-280", 0xb343),+      ("skein512-288", 0xb344),+      ("skein512-296", 0xb345),+      ("skein512-304", 0xb346),+      ("skein512-312", 0xb347),+      ("skein512-320", 0xb348),+      ("skein512-328", 0xb349),+      ("skein512-336", 0xb34a),+      ("skein512-344", 0xb34b),+      ("skein512-352", 0xb34c),+      ("skein512-360", 0xb34d),+      ("skein512-368", 0xb34e),+      ("skein512-376", 0xb34f),+      ("skein512-384", 0xb350),+      ("skein512-392", 0xb351),+      ("skein512-400", 0xb352),+      ("skein512-408", 0xb353),+      ("skein512-416", 0xb354),+      ("skein512-424", 0xb355),+      ("skein512-432", 0xb356),+      ("skein512-440", 0xb357),+      ("skein512-448", 0xb358),+      ("skein512-456", 0xb359),+      ("skein512-464", 0xb35a),+      ("skein512-472", 0xb35b),+      ("skein512-480", 0xb35c),+      ("skein512-488", 0xb35d),+      ("skein512-496", 0xb35e),+      ("skein512-504", 0xb35f),+      ("skein512-512", 0xb360),+      ("skein1024-8", 0xb361),+      ("skein1024-16", 0xb362),+      ("skein1024-24", 0xb363),+      ("skein1024-32", 0xb364),+      ("skein1024-40", 0xb365),+      ("skein1024-48", 0xb366),+      ("skein1024-56", 0xb367),+      ("skein1024-64", 0xb368),+      ("skein1024-72", 0xb369),+      ("skein1024-80", 0xb36a),+      ("skein1024-88", 0xb36b),+      ("skein1024-96", 0xb36c),+      ("skein1024-104", 0xb36d),+      ("skein1024-112", 0xb36e),+      ("skein1024-120", 0xb36f),+      ("skein1024-128", 0xb370),+      ("skein1024-136", 0xb371),+      ("skein1024-144", 0xb372),+      ("skein1024-152", 0xb373),+      ("skein1024-160", 0xb374),+      ("skein1024-168", 0xb375),+      ("skein1024-176", 0xb376),+      ("skein1024-184", 0xb377),+      ("skein1024-192", 0xb378),+      ("skein1024-200", 0xb379),+      ("skein1024-208", 0xb37a),+      ("skein1024-216", 0xb37b),+      ("skein1024-224", 0xb37c),+      ("skein1024-232", 0xb37d),+      ("skein1024-240", 0xb37e),+      ("skein1024-248", 0xb37f),+      ("skein1024-256", 0xb380),+      ("skein1024-264", 0xb381),+      ("skein1024-272", 0xb382),+      ("skein1024-280", 0xb383),+      ("skein1024-288", 0xb384),+      ("skein1024-296", 0xb385),+      ("skein1024-304", 0xb386),+      ("skein1024-312", 0xb387),+      ("skein1024-320", 0xb388),+      ("skein1024-328", 0xb389),+      ("skein1024-336", 0xb38a),+      ("skein1024-344", 0xb38b),+      ("skein1024-352", 0xb38c),+      ("skein1024-360", 0xb38d),+      ("skein1024-368", 0xb38e),+      ("skein1024-376", 0xb38f),+      ("skein1024-384", 0xb390),+      ("skein1024-392", 0xb391),+      ("skein1024-400", 0xb392),+      ("skein1024-408", 0xb393),+      ("skein1024-416", 0xb394),+      ("skein1024-424", 0xb395),+      ("skein1024-432", 0xb396),+      ("skein1024-440", 0xb397),+      ("skein1024-448", 0xb398),+      ("skein1024-456", 0xb399),+      ("skein1024-464", 0xb39a),+      ("skein1024-472", 0xb39b),+      ("skein1024-480", 0xb39c),+      ("skein1024-488", 0xb39d),+      ("skein1024-496", 0xb39e),+      ("skein1024-504", 0xb39f),+      ("skein1024-512", 0xb3a0),+      ("skein1024-520", 0xb3a1),+      ("skein1024-528", 0xb3a2),+      ("skein1024-536", 0xb3a3),+      ("skein1024-544", 0xb3a4),+      ("skein1024-552", 0xb3a5),+      ("skein1024-560", 0xb3a6),+      ("skein1024-568", 0xb3a7),+      ("skein1024-576", 0xb3a8),+      ("skein1024-584", 0xb3a9),+      ("skein1024-592", 0xb3aa),+      ("skein1024-600", 0xb3ab),+      ("skein1024-608", 0xb3ac),+      ("skein1024-616", 0xb3ad),+      ("skein1024-624", 0xb3ae),+      ("skein1024-632", 0xb3af),+      ("skein1024-640", 0xb3b0),+      ("skein1024-648", 0xb3b1),+      ("skein1024-656", 0xb3b2),+      ("skein1024-664", 0xb3b3),+      ("skein1024-672", 0xb3b4),+      ("skein1024-680", 0xb3b5),+      ("skein1024-688", 0xb3b6),+      ("skein1024-696", 0xb3b7),+      ("skein1024-704", 0xb3b8),+      ("skein1024-712", 0xb3b9),+      ("skein1024-720", 0xb3ba),+      ("skein1024-728", 0xb3bb),+      ("skein1024-736", 0xb3bc),+      ("skein1024-744", 0xb3bd),+      ("skein1024-752", 0xb3be),+      ("skein1024-760", 0xb3bf),+      ("skein1024-768", 0xb3c0),+      ("skein1024-776", 0xb3c1),+      ("skein1024-784", 0xb3c2),+      ("skein1024-792", 0xb3c3),+      ("skein1024-800", 0xb3c4),+      ("skein1024-808", 0xb3c5),+      ("skein1024-816", 0xb3c6),+      ("skein1024-824", 0xb3c7),+      ("skein1024-832", 0xb3c8),+      ("skein1024-840", 0xb3c9),+      ("skein1024-848", 0xb3ca),+      ("skein1024-856", 0xb3cb),+      ("skein1024-864", 0xb3cc),+      ("skein1024-872", 0xb3cd),+      ("skein1024-880", 0xb3ce),+      ("skein1024-888", 0xb3cf),+      ("skein1024-896", 0xb3d0),+      ("skein1024-904", 0xb3d1),+      ("skein1024-912", 0xb3d2),+      ("skein1024-920", 0xb3d3),+      ("skein1024-928", 0xb3d4),+      ("skein1024-936", 0xb3d5),+      ("skein1024-944", 0xb3d6),+      ("skein1024-952", 0xb3d7),+      ("skein1024-960", 0xb3d8),+      ("skein1024-968", 0xb3d9),+      ("skein1024-976", 0xb3da),+      ("skein1024-984", 0xb3db),+      ("skein1024-992", 0xb3dc),+      ("skein1024-1000", 0xb3dd),+      ("skein1024-1008", 0xb3de),+      ("skein1024-1016", 0xb3df),+      ("skein1024-1024", 0xb3e0),+      ("xxh-32", 0xb3e1),+      ("xxh-64", 0xb3e2),+      ("xxh3-64", 0xb3e3),+      ("xxh3-128", 0xb3e4),+      ("poseidon-bls12_381-a2-fc1", 0xb401),+      ("poseidon-bls12_381-a2-fc1-sc", 0xb402),+      ("rdfc-1", 0xb403),+      ("ssz", 0xb501),+      ("ssz-sha2-256-bmt", 0xb502),+      ("sha2-256-chunked", 0xb510),+      ("json-jcs", 0xb601),+      ("bittorrent-pieces-root", 0xb702),+      ("iscc", 0xcc01),+      ("zeroxcert-imprint-256", 0xce11),+      ("bcrypt-pbkdf", 0xd00d),+      ("es256k", 0xd0e7),+      ("bls12_381-g1-sig", 0xd0ea),+      ("bls12_381-g2-sig", 0xd0eb),+      ("eddsa", 0xd0ed),+      ("eip-191", 0xd191),+      ("jwk_jcs-pub", 0xeb51),+      ("ed2k", 0xed20),+      ("fil-commitment-unsealed", 0xf101),+      ("fil-commitment-sealed", 0xf102),+      ("shelter-contract-manifest", 0x511e00),+      ("shelter-contract-text", 0x511e01),+      ("shelter-contract-data", 0x511e02),+      ("shelter-file-manifest", 0x511e03),+      ("shelter-file-chunk", 0x511e04),+      ("plaintextv2", 0x706c61),+      ("holochain-adr-v0", 0x807124),+      ("holochain-adr-v1", 0x817124),+      ("holochain-key-v0", 0x947124),+      ("holochain-key-v1", 0x957124),+      ("holochain-sig-v0", 0xa27124),+      ("holochain-sig-v1", 0xa37124),+      ("skynet-ns", 0xb19910),+      ("arweave-ns", 0xb29910),+      ("subspace-ns", 0xb39910),+      ("kumandra-ns", 0xb49910),+      ("massa", 0xb59910),+      ("massa-mainnet", 0xb59911),+      ("massa-buildnet", 0xb59912),+      ("massa-deweb", 0xb59913),+      ("massa-gossip", 0xb59914),+      ("massa-mns", 0xb59915),+      ("massa-sc", 0xb59916),+      ("massa-gossip-id", 0xb59917),+      ("es256", 0xd01200),+      ("es384", 0xd01201),+      ("es512", 0xd01202),+      ("rs256", 0xd01205),+      ("es256k-msig", 0xd01300),+      ("bls12_381-g1-msig", 0xd01301),+      ("bls12_381-g2-msig", 0xd01302),+      ("eddsa-msig", 0xd01303),+      ("bls12_381-g1-share-msig", 0xd01304),+      ("bls12_381-g2-share-msig", 0xd01305),+      ("lamport-msig", 0xd01306),+      ("lamport-share-msig", 0xd01307),+      ("es256-msig", 0xd01308),+      ("es384-msig", 0xd01309),+      ("es521-msig", 0xd0130a),+      ("rs256-msig", 0xd0130b),+      ("scion", 0xd02000)+    ]++codecToName :: Map VarInt String+codecToName =+  LazyMap.fromList+    [ (0x00, "identity"),+      (0x01, "cidv1"),+      (0x02, "cidv2"),+      (0x03, "cidv3"),+      (0x04, "ip4"),+      (0x06, "tcp"),+      (0x11, "sha1"),+      (0x12, "sha2-256"),+      (0x13, "sha2-512"),+      (0x14, "sha3-512"),+      (0x15, "sha3-384"),+      (0x16, "sha3-256"),+      (0x17, "sha3-224"),+      (0x18, "shake-128"),+      (0x19, "shake-256"),+      (0x1a, "keccak-224"),+      (0x1b, "keccak-256"),+      (0x1c, "keccak-384"),+      (0x1d, "keccak-512"),+      (0x1e, "blake3"),+      (0x20, "sha2-384"),+      (0x21, "dccp"),+      (0x22, "murmur3-x64-64"),+      (0x23, "murmur3-32"),+      (0x29, "ip6"),+      (0x2a, "ip6zone"),+      (0x2b, "ipcidr"),+      (0x2f, "path"),+      (0x30, "multicodec"),+      (0x31, "multihash"),+      (0x32, "multiaddr"),+      (0x33, "multibase"),+      (0x34, "varsig"),+      (0x35, "dns"),+      (0x36, "dns4"),+      (0x37, "dns6"),+      (0x38, "dnsaddr"),+      (0x50, "protobuf"),+      (0x51, "cbor"),+      (0x55, "raw"),+      (0x56, "dbl-sha2-256"),+      (0x60, "rlp"),+      (0x63, "bencode"),+      (0x70, "dag-pb"),+      (0x71, "dag-cbor"),+      (0x72, "libp2p-key"),+      (0x78, "git-raw"),+      (0x7b, "torrent-info"),+      (0x7c, "torrent-file"),+      (0x80, "blake3-hashseq"),+      (0x81, "leofcoin-block"),+      (0x82, "leofcoin-tx"),+      (0x83, "leofcoin-pr"),+      (0x84, "sctp"),+      (0x85, "dag-jose"),+      (0x86, "dag-cose"),+      (0x8c, "lbry"),+      (0x90, "eth-block"),+      (0x91, "eth-block-list"),+      (0x92, "eth-tx-trie"),+      (0x93, "eth-tx"),+      (0x94, "eth-tx-receipt-trie"),+      (0x95, "eth-tx-receipt"),+      (0x96, "eth-state-trie"),+      (0x97, "eth-account-snapshot"),+      (0x98, "eth-storage-trie"),+      (0x99, "eth-receipt-log-trie"),+      (0x9a, "eth-receipt-log"),+      (0xa0, "aes-128"),+      (0xa1, "aes-192"),+      (0xa2, "aes-256"),+      (0xa3, "chacha-128"),+      (0xa4, "chacha-256"),+      (0xb0, "bitcoin-block"),+      (0xb1, "bitcoin-tx"),+      (0xb2, "bitcoin-witness-commitment"),+      (0xc0, "zcash-block"),+      (0xc1, "zcash-tx"),+      (0xca, "caip-50"),+      (0xce, "streamid"),+      (0xd0, "stellar-block"),+      (0xd1, "stellar-tx"),+      (0xd4, "md4"),+      (0xd5, "md5"),+      (0xe0, "decred-block"),+      (0xe1, "decred-tx"),+      (0xe2, "ipld"),+      (0xe3, "ipfs"),+      (0xe4, "swarm"),+      (0xe5, "ipns"),+      (0xe6, "zeronet"),+      (0xe7, "secp256k1-pub"),+      (0xe8, "dnslink"),+      (0xea, "bls12_381-g1-pub"),+      (0xeb, "bls12_381-g2-pub"),+      (0xec, "x25519-pub"),+      (0xed, "ed25519-pub"),+      (0xee, "bls12_381-g1g2-pub"),+      (0xef, "sr25519-pub"),+      (0xf0, "dash-block"),+      (0xf1, "dash-tx"),+      (0xfa, "swarm-manifest"),+      (0xfb, "swarm-feed"),+      (0xfc, "beeson"),+      (0x0111, "udp"),+      (0x0118, "webrtc-direct"),+      (0x0119, "webrtc"),+      (0x0122, "p2p-circuit"),+      (0x0129, "dag-json"),+      (0x012d, "udt"),+      (0x012e, "utp"),+      (0x0132, "crc32"),+      (0x0164, "crc64-ecma"),+      (0x0165, "crc64-nvme"),+      (0x0190, "unix"),+      (0x0196, "thread"),+      (0x01a5, "p2p"),+      (0x01bb, "https"),+      (0x01bc, "onion"),+      (0x01bd, "onion3"),+      (0x01be, "garlic64"),+      (0x01bf, "garlic32"),+      (0x01c0, "tls"),+      (0x01c1, "sni"),+      (0x01c6, "noise"),+      (0x01c8, "shs"),+      (0x01cc, "quic"),+      (0x01cd, "quic-v1"),+      (0x01d1, "webtransport"),+      (0x01d2, "certhash"),+      (0x01dd, "ws"),+      (0x01de, "wss"),+      (0x01df, "p2p-websocket-star"),+      (0x01e0, "http"),+      (0x01e1, "http-path"),+      (0x01f0, "swhid-1-snp"),+      (0x0200, "json"),+      (0x0201, "messagepack"),+      (0x0202, "car"),+      (0x0210, "x509-certificate"),+      (0x0300, "ipns-record"),+      (0x0301, "libp2p-peer-record"),+      (0x0302, "libp2p-relay-rsvp"),+      (0x0309, "memorytransport"),+      (0x0400, "car-index-sorted"),+      (0x0401, "car-multihash-index-sorted"),+      (0x0900, "transport-bitswap"),+      (0x0910, "transport-graphsync-filecoinv1"),+      (0x0920, "transport-ipfs-gateway-http"),+      (0x0930, "transport-filecoin-piece-http"),+      (0x0d1d, "multidid"),+      (0x1011, "fr32-sha256-trunc254-padbintree"),+      (0x1012, "sha2-256-trunc254-padded"),+      (0x1013, "sha2-224"),+      (0x1014, "sha2-512-224"),+      (0x1015, "sha2-512-256"),+      (0x1022, "murmur3-x64-128"),+      (0x1052, "ripemd-128"),+      (0x1053, "ripemd-160"),+      (0x1054, "ripemd-256"),+      (0x1055, "ripemd-320"),+      (0x1100, "x11"),+      (0x1200, "p256-pub"),+      (0x1201, "p384-pub"),+      (0x1202, "p521-pub"),+      (0x1203, "ed448-pub"),+      (0x1204, "x448-pub"),+      (0x1205, "rsa-pub"),+      (0x1206, "sm2-pub"),+      (0x1207, "vlad"),+      (0x1208, "provenance-log"),+      (0x1209, "provenance-log-entry"),+      (0x120a, "provenance-log-script"),+      (0x120b, "mlkem-512-pub"),+      (0x120c, "mlkem-768-pub"),+      (0x120d, "mlkem-1024-pub"),+      (0x1210, "mldsa-44-pub"),+      (0x1211, "mldsa-65-pub"),+      (0x1212, "mldsa-87-pub"),+      (0x1220, "slhdsa-sha2-128s-pub"),+      (0x1221, "slhdsa-shake-128s-pub"),+      (0x1222, "slhdsa-sha2-128f-pub"),+      (0x1223, "slhdsa-shake-128f-pub"),+      (0x1224, "slhdsa-sha2-192s-pub"),+      (0x1225, "slhdsa-shake-192s-pub"),+      (0x1226, "slhdsa-sha2-192f-pub"),+      (0x1227, "slhdsa-shake-192f-pub"),+      (0x1228, "slhdsa-sha2-256s-pub"),+      (0x1229, "slhdsa-shake-256s-pub"),+      (0x122a, "slhdsa-sha2-256f-pub"),+      (0x122b, "slhdsa-shake-256f-pub"),+      (0x1239, "multisig"),+      (0x123a, "multikey"),+      (0x123b, "nonce"),+      (0x1300, "ed25519-priv"),+      (0x1301, "secp256k1-priv"),+      (0x1302, "x25519-priv"),+      (0x1303, "sr25519-priv"),+      (0x1305, "rsa-priv"),+      (0x1306, "p256-priv"),+      (0x1307, "p384-priv"),+      (0x1308, "p521-priv"),+      (0x1309, "bls12_381-g1-priv"),+      (0x130a, "bls12_381-g2-priv"),+      (0x130b, "bls12_381-g1g2-priv"),+      (0x130c, "bls12_381-g1-pub-share"),+      (0x130d, "bls12_381-g2-pub-share"),+      (0x130e, "bls12_381-g1-priv-share"),+      (0x130f, "bls12_381-g2-priv-share"),+      (0x1310, "sm2-priv"),+      (0x1311, "ed448-priv"),+      (0x1312, "x448-priv"),+      (0x1313, "mlkem-512-priv"),+      (0x1314, "mlkem-768-priv"),+      (0x1315, "mlkem-1024-priv"),+      (0x1316, "jwk_jcs-priv"),+      (0x1a14, "lamport-sha3-512-pub"),+      (0x1a15, "lamport-sha3-384-pub"),+      (0x1a16, "lamport-sha3-256-pub"),+      (0x1a24, "lamport-sha3-512-priv"),+      (0x1a25, "lamport-sha3-384-priv"),+      (0x1a26, "lamport-sha3-256-priv"),+      (0x1a34, "lamport-sha3-512-priv-share"),+      (0x1a35, "lamport-sha3-384-priv-share"),+      (0x1a36, "lamport-sha3-256-priv-share"),+      (0x1a44, "lamport-sha3-512-sig"),+      (0x1a45, "lamport-sha3-384-sig"),+      (0x1a46, "lamport-sha3-256-sig"),+      (0x1a54, "lamport-sha3-512-sig-share"),+      (0x1a55, "lamport-sha3-384-sig-share"),+      (0x1a56, "lamport-sha3-256-sig-share"),+      (0x1d01, "kangarootwelve"),+      (0x2000, "aes-gcm-256"),+      (0x3f42, "silverpine"),+      (0x534d, "sm3-256"),+      (0x7012, "sha256a"),+      (0xa000, "chacha20-poly1305"),+      (0xb201, "blake2b-8"),+      (0xb202, "blake2b-16"),+      (0xb203, "blake2b-24"),+      (0xb204, "blake2b-32"),+      (0xb205, "blake2b-40"),+      (0xb206, "blake2b-48"),+      (0xb207, "blake2b-56"),+      (0xb208, "blake2b-64"),+      (0xb209, "blake2b-72"),+      (0xb20a, "blake2b-80"),+      (0xb20b, "blake2b-88"),+      (0xb20c, "blake2b-96"),+      (0xb20d, "blake2b-104"),+      (0xb20e, "blake2b-112"),+      (0xb20f, "blake2b-120"),+      (0xb210, "blake2b-128"),+      (0xb211, "blake2b-136"),+      (0xb212, "blake2b-144"),+      (0xb213, "blake2b-152"),+      (0xb214, "blake2b-160"),+      (0xb215, "blake2b-168"),+      (0xb216, "blake2b-176"),+      (0xb217, "blake2b-184"),+      (0xb218, "blake2b-192"),+      (0xb219, "blake2b-200"),+      (0xb21a, "blake2b-208"),+      (0xb21b, "blake2b-216"),+      (0xb21c, "blake2b-224"),+      (0xb21d, "blake2b-232"),+      (0xb21e, "blake2b-240"),+      (0xb21f, "blake2b-248"),+      (0xb220, "blake2b-256"),+      (0xb221, "blake2b-264"),+      (0xb222, "blake2b-272"),+      (0xb223, "blake2b-280"),+      (0xb224, "blake2b-288"),+      (0xb225, "blake2b-296"),+      (0xb226, "blake2b-304"),+      (0xb227, "blake2b-312"),+      (0xb228, "blake2b-320"),+      (0xb229, "blake2b-328"),+      (0xb22a, "blake2b-336"),+      (0xb22b, "blake2b-344"),+      (0xb22c, "blake2b-352"),+      (0xb22d, "blake2b-360"),+      (0xb22e, "blake2b-368"),+      (0xb22f, "blake2b-376"),+      (0xb230, "blake2b-384"),+      (0xb231, "blake2b-392"),+      (0xb232, "blake2b-400"),+      (0xb233, "blake2b-408"),+      (0xb234, "blake2b-416"),+      (0xb235, "blake2b-424"),+      (0xb236, "blake2b-432"),+      (0xb237, "blake2b-440"),+      (0xb238, "blake2b-448"),+      (0xb239, "blake2b-456"),+      (0xb23a, "blake2b-464"),+      (0xb23b, "blake2b-472"),+      (0xb23c, "blake2b-480"),+      (0xb23d, "blake2b-488"),+      (0xb23e, "blake2b-496"),+      (0xb23f, "blake2b-504"),+      (0xb240, "blake2b-512"),+      (0xb241, "blake2s-8"),+      (0xb242, "blake2s-16"),+      (0xb243, "blake2s-24"),+      (0xb244, "blake2s-32"),+      (0xb245, "blake2s-40"),+      (0xb246, "blake2s-48"),+      (0xb247, "blake2s-56"),+      (0xb248, "blake2s-64"),+      (0xb249, "blake2s-72"),+      (0xb24a, "blake2s-80"),+      (0xb24b, "blake2s-88"),+      (0xb24c, "blake2s-96"),+      (0xb24d, "blake2s-104"),+      (0xb24e, "blake2s-112"),+      (0xb24f, "blake2s-120"),+      (0xb250, "blake2s-128"),+      (0xb251, "blake2s-136"),+      (0xb252, "blake2s-144"),+      (0xb253, "blake2s-152"),+      (0xb254, "blake2s-160"),+      (0xb255, "blake2s-168"),+      (0xb256, "blake2s-176"),+      (0xb257, "blake2s-184"),+      (0xb258, "blake2s-192"),+      (0xb259, "blake2s-200"),+      (0xb25a, "blake2s-208"),+      (0xb25b, "blake2s-216"),+      (0xb25c, "blake2s-224"),+      (0xb25d, "blake2s-232"),+      (0xb25e, "blake2s-240"),+      (0xb25f, "blake2s-248"),+      (0xb260, "blake2s-256"),+      (0xb301, "skein256-8"),+      (0xb302, "skein256-16"),+      (0xb303, "skein256-24"),+      (0xb304, "skein256-32"),+      (0xb305, "skein256-40"),+      (0xb306, "skein256-48"),+      (0xb307, "skein256-56"),+      (0xb308, "skein256-64"),+      (0xb309, "skein256-72"),+      (0xb30a, "skein256-80"),+      (0xb30b, "skein256-88"),+      (0xb30c, "skein256-96"),+      (0xb30d, "skein256-104"),+      (0xb30e, "skein256-112"),+      (0xb30f, "skein256-120"),+      (0xb310, "skein256-128"),+      (0xb311, "skein256-136"),+      (0xb312, "skein256-144"),+      (0xb313, "skein256-152"),+      (0xb314, "skein256-160"),+      (0xb315, "skein256-168"),+      (0xb316, "skein256-176"),+      (0xb317, "skein256-184"),+      (0xb318, "skein256-192"),+      (0xb319, "skein256-200"),+      (0xb31a, "skein256-208"),+      (0xb31b, "skein256-216"),+      (0xb31c, "skein256-224"),+      (0xb31d, "skein256-232"),+      (0xb31e, "skein256-240"),+      (0xb31f, "skein256-248"),+      (0xb320, "skein256-256"),+      (0xb321, "skein512-8"),+      (0xb322, "skein512-16"),+      (0xb323, "skein512-24"),+      (0xb324, "skein512-32"),+      (0xb325, "skein512-40"),+      (0xb326, "skein512-48"),+      (0xb327, "skein512-56"),+      (0xb328, "skein512-64"),+      (0xb329, "skein512-72"),+      (0xb32a, "skein512-80"),+      (0xb32b, "skein512-88"),+      (0xb32c, "skein512-96"),+      (0xb32d, "skein512-104"),+      (0xb32e, "skein512-112"),+      (0xb32f, "skein512-120"),+      (0xb330, "skein512-128"),+      (0xb331, "skein512-136"),+      (0xb332, "skein512-144"),+      (0xb333, "skein512-152"),+      (0xb334, "skein512-160"),+      (0xb335, "skein512-168"),+      (0xb336, "skein512-176"),+      (0xb337, "skein512-184"),+      (0xb338, "skein512-192"),+      (0xb339, "skein512-200"),+      (0xb33a, "skein512-208"),+      (0xb33b, "skein512-216"),+      (0xb33c, "skein512-224"),+      (0xb33d, "skein512-232"),+      (0xb33e, "skein512-240"),+      (0xb33f, "skein512-248"),+      (0xb340, "skein512-256"),+      (0xb341, "skein512-264"),+      (0xb342, "skein512-272"),+      (0xb343, "skein512-280"),+      (0xb344, "skein512-288"),+      (0xb345, "skein512-296"),+      (0xb346, "skein512-304"),+      (0xb347, "skein512-312"),+      (0xb348, "skein512-320"),+      (0xb349, "skein512-328"),+      (0xb34a, "skein512-336"),+      (0xb34b, "skein512-344"),+      (0xb34c, "skein512-352"),+      (0xb34d, "skein512-360"),+      (0xb34e, "skein512-368"),+      (0xb34f, "skein512-376"),+      (0xb350, "skein512-384"),+      (0xb351, "skein512-392"),+      (0xb352, "skein512-400"),+      (0xb353, "skein512-408"),+      (0xb354, "skein512-416"),+      (0xb355, "skein512-424"),+      (0xb356, "skein512-432"),+      (0xb357, "skein512-440"),+      (0xb358, "skein512-448"),+      (0xb359, "skein512-456"),+      (0xb35a, "skein512-464"),+      (0xb35b, "skein512-472"),+      (0xb35c, "skein512-480"),+      (0xb35d, "skein512-488"),+      (0xb35e, "skein512-496"),+      (0xb35f, "skein512-504"),+      (0xb360, "skein512-512"),+      (0xb361, "skein1024-8"),+      (0xb362, "skein1024-16"),+      (0xb363, "skein1024-24"),+      (0xb364, "skein1024-32"),+      (0xb365, "skein1024-40"),+      (0xb366, "skein1024-48"),+      (0xb367, "skein1024-56"),+      (0xb368, "skein1024-64"),+      (0xb369, "skein1024-72"),+      (0xb36a, "skein1024-80"),+      (0xb36b, "skein1024-88"),+      (0xb36c, "skein1024-96"),+      (0xb36d, "skein1024-104"),+      (0xb36e, "skein1024-112"),+      (0xb36f, "skein1024-120"),+      (0xb370, "skein1024-128"),+      (0xb371, "skein1024-136"),+      (0xb372, "skein1024-144"),+      (0xb373, "skein1024-152"),+      (0xb374, "skein1024-160"),+      (0xb375, "skein1024-168"),+      (0xb376, "skein1024-176"),+      (0xb377, "skein1024-184"),+      (0xb378, "skein1024-192"),+      (0xb379, "skein1024-200"),+      (0xb37a, "skein1024-208"),+      (0xb37b, "skein1024-216"),+      (0xb37c, "skein1024-224"),+      (0xb37d, "skein1024-232"),+      (0xb37e, "skein1024-240"),+      (0xb37f, "skein1024-248"),+      (0xb380, "skein1024-256"),+      (0xb381, "skein1024-264"),+      (0xb382, "skein1024-272"),+      (0xb383, "skein1024-280"),+      (0xb384, "skein1024-288"),+      (0xb385, "skein1024-296"),+      (0xb386, "skein1024-304"),+      (0xb387, "skein1024-312"),+      (0xb388, "skein1024-320"),+      (0xb389, "skein1024-328"),+      (0xb38a, "skein1024-336"),+      (0xb38b, "skein1024-344"),+      (0xb38c, "skein1024-352"),+      (0xb38d, "skein1024-360"),+      (0xb38e, "skein1024-368"),+      (0xb38f, "skein1024-376"),+      (0xb390, "skein1024-384"),+      (0xb391, "skein1024-392"),+      (0xb392, "skein1024-400"),+      (0xb393, "skein1024-408"),+      (0xb394, "skein1024-416"),+      (0xb395, "skein1024-424"),+      (0xb396, "skein1024-432"),+      (0xb397, "skein1024-440"),+      (0xb398, "skein1024-448"),+      (0xb399, "skein1024-456"),+      (0xb39a, "skein1024-464"),+      (0xb39b, "skein1024-472"),+      (0xb39c, "skein1024-480"),+      (0xb39d, "skein1024-488"),+      (0xb39e, "skein1024-496"),+      (0xb39f, "skein1024-504"),+      (0xb3a0, "skein1024-512"),+      (0xb3a1, "skein1024-520"),+      (0xb3a2, "skein1024-528"),+      (0xb3a3, "skein1024-536"),+      (0xb3a4, "skein1024-544"),+      (0xb3a5, "skein1024-552"),+      (0xb3a6, "skein1024-560"),+      (0xb3a7, "skein1024-568"),+      (0xb3a8, "skein1024-576"),+      (0xb3a9, "skein1024-584"),+      (0xb3aa, "skein1024-592"),+      (0xb3ab, "skein1024-600"),+      (0xb3ac, "skein1024-608"),+      (0xb3ad, "skein1024-616"),+      (0xb3ae, "skein1024-624"),+      (0xb3af, "skein1024-632"),+      (0xb3b0, "skein1024-640"),+      (0xb3b1, "skein1024-648"),+      (0xb3b2, "skein1024-656"),+      (0xb3b3, "skein1024-664"),+      (0xb3b4, "skein1024-672"),+      (0xb3b5, "skein1024-680"),+      (0xb3b6, "skein1024-688"),+      (0xb3b7, "skein1024-696"),+      (0xb3b8, "skein1024-704"),+      (0xb3b9, "skein1024-712"),+      (0xb3ba, "skein1024-720"),+      (0xb3bb, "skein1024-728"),+      (0xb3bc, "skein1024-736"),+      (0xb3bd, "skein1024-744"),+      (0xb3be, "skein1024-752"),+      (0xb3bf, "skein1024-760"),+      (0xb3c0, "skein1024-768"),+      (0xb3c1, "skein1024-776"),+      (0xb3c2, "skein1024-784"),+      (0xb3c3, "skein1024-792"),+      (0xb3c4, "skein1024-800"),+      (0xb3c5, "skein1024-808"),+      (0xb3c6, "skein1024-816"),+      (0xb3c7, "skein1024-824"),+      (0xb3c8, "skein1024-832"),+      (0xb3c9, "skein1024-840"),+      (0xb3ca, "skein1024-848"),+      (0xb3cb, "skein1024-856"),+      (0xb3cc, "skein1024-864"),+      (0xb3cd, "skein1024-872"),+      (0xb3ce, "skein1024-880"),+      (0xb3cf, "skein1024-888"),+      (0xb3d0, "skein1024-896"),+      (0xb3d1, "skein1024-904"),+      (0xb3d2, "skein1024-912"),+      (0xb3d3, "skein1024-920"),+      (0xb3d4, "skein1024-928"),+      (0xb3d5, "skein1024-936"),+      (0xb3d6, "skein1024-944"),+      (0xb3d7, "skein1024-952"),+      (0xb3d8, "skein1024-960"),+      (0xb3d9, "skein1024-968"),+      (0xb3da, "skein1024-976"),+      (0xb3db, "skein1024-984"),+      (0xb3dc, "skein1024-992"),+      (0xb3dd, "skein1024-1000"),+      (0xb3de, "skein1024-1008"),+      (0xb3df, "skein1024-1016"),+      (0xb3e0, "skein1024-1024"),+      (0xb3e1, "xxh-32"),+      (0xb3e2, "xxh-64"),+      (0xb3e3, "xxh3-64"),+      (0xb3e4, "xxh3-128"),+      (0xb401, "poseidon-bls12_381-a2-fc1"),+      (0xb402, "poseidon-bls12_381-a2-fc1-sc"),+      (0xb403, "rdfc-1"),+      (0xb501, "ssz"),+      (0xb502, "ssz-sha2-256-bmt"),+      (0xb510, "sha2-256-chunked"),+      (0xb601, "json-jcs"),+      (0xb702, "bittorrent-pieces-root"),+      (0xcc01, "iscc"),+      (0xce11, "zeroxcert-imprint-256"),+      (0xd00d, "bcrypt-pbkdf"),+      (0xd0e7, "es256k"),+      (0xd0ea, "bls12_381-g1-sig"),+      (0xd0eb, "bls12_381-g2-sig"),+      (0xd0ed, "eddsa"),+      (0xd191, "eip-191"),+      (0xeb51, "jwk_jcs-pub"),+      (0xed20, "ed2k"),+      (0xf101, "fil-commitment-unsealed"),+      (0xf102, "fil-commitment-sealed"),+      (0x511e00, "shelter-contract-manifest"),+      (0x511e01, "shelter-contract-text"),+      (0x511e02, "shelter-contract-data"),+      (0x511e03, "shelter-file-manifest"),+      (0x511e04, "shelter-file-chunk"),+      (0x706c61, "plaintextv2"),+      (0x807124, "holochain-adr-v0"),+      (0x817124, "holochain-adr-v1"),+      (0x947124, "holochain-key-v0"),+      (0x957124, "holochain-key-v1"),+      (0xa27124, "holochain-sig-v0"),+      (0xa37124, "holochain-sig-v1"),+      (0xb19910, "skynet-ns"),+      (0xb29910, "arweave-ns"),+      (0xb39910, "subspace-ns"),+      (0xb49910, "kumandra-ns"),+      (0xb59910, "massa"),+      (0xb59911, "massa-mainnet"),+      (0xb59912, "massa-buildnet"),+      (0xb59913, "massa-deweb"),+      (0xb59914, "massa-gossip"),+      (0xb59915, "massa-mns"),+      (0xb59916, "massa-sc"),+      (0xb59917, "massa-gossip-id"),+      (0xd01200, "es256"),+      (0xd01201, "es384"),+      (0xd01202, "es512"),+      (0xd01205, "rs256"),+      (0xd01300, "es256k-msig"),+      (0xd01301, "bls12_381-g1-msig"),+      (0xd01302, "bls12_381-g2-msig"),+      (0xd01303, "eddsa-msig"),+      (0xd01304, "bls12_381-g1-share-msig"),+      (0xd01305, "bls12_381-g2-share-msig"),+      (0xd01306, "lamport-msig"),+      (0xd01307, "lamport-share-msig"),+      (0xd01308, "es256-msig"),+      (0xd01309, "es384-msig"),+      (0xd0130a, "es521-msig"),+      (0xd0130b, "rs256-msig"),+      (0xd02000, "scion")+    ]

@@ -0,0 +1,104 @@+-- | Module      : MultiFormats.MultiHash+--   Description : Associates multicodec values with their hash functions.+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- Provides a lookup table to verify multicodec values as multihashes and a way+-- to resolve hash functions from multicodecs or their multicodec name. See:+-- https://github.com/multiformats/multihash+module MultiFormats.MultiHash+  ( MultiHash (MultiHash, multiHashCodec, multiHashFunction),+    resolveHashCodec,+    resolveHashName,+  )+where++import Control.Monad (join)+import Crypto.Hash (HashAlgorithm)+import Crypto.Hash qualified as HF+import Crypto.Hash.Algorithms qualified as Algo+import Data.ByteArray qualified as Memory+import Data.ByteString (ByteString)+import Data.ByteString qualified as Bytes+import Data.Function (on)+import Data.Map (Map)+import Data.Map qualified as LazyMap+import Data.Maybe (fromMaybe, mapMaybe)+import MultiFormats.MultiCodec (MultiCodec (..), resolveCodecName, resolveCodecValue)+import Text.Printf (printf)++-- | Alias for the type of function signture we want from a hash function.+type HashFunction = ByteString -> ByteString++-- | Forms the MultiHash implementaton.+data MultiHash = MultiHash+  { -- | Stores the MultiCodec associated with multiHashCodec. Used for Eq, Ord.+    multiHashCodec :: MultiCodec,+    -- | Lazy loads the hash function when called.+    multiHashFunction :: ~HashFunction+  }++instance Show MultiHash where+  show =+    printf "MultiHash(%s)"+      . fromMaybe "<invalid codec>"+      . resolveCodecName+      . multiHashCodec++instance Eq MultiHash where+  (==) = (==) `on` multiHashCodec++instance Ord MultiHash where+  compare = compare `on` multiHashCodec++-- | Resolves a MultiHash from a MultiCodec.+resolveHashCodec :: MultiCodec -> Maybe MultiHash+resolveHashCodec codec =+  MultiHash codec <$> join (LazyMap.lookup codec hashFunctionTable)++-- | Resolves a MultiHash from MultiCodec name.+resolveHashName :: String -> Maybe MultiHash+resolveHashName name = resolveHashCodec =<< resolveCodecValue name++-- Provides an implementation for the given HashAlgorithm.+hashImpl :: (HashAlgorithm a) => a -> Maybe HashFunction+hashImpl algo =+  -- This code is really slow. It copies each byte from Memory to+  -- a new ByteString. I wonder if I can take the pointer from Memory and+  -- assign it to a ByteString for O(1) conversion. Or if we can convince the+  -- compiler that that's all that needs done.+  return $ Bytes.pack . Memory.unpack . HF.hashWith algo++-- | Resolves all the String names from MultiCodec table and assigns an+-- implementation of the hash function if it exists+hashFunctionTable :: Map MultiCodec (Maybe HashFunction)+hashFunctionTable =+  -- We want a lazy map so we can skip evaluting hash functions that never get+  -- looked up, but we have to evaluate all the hash codecs that exist.+  LazyMap.fromList $+    -- This should leave the hfuncs unevaluted in the Map.+    mapMaybe+      (\(name, hfunc) -> (,hfunc) <$> resolveCodecValue name)+      [ ("identity", Just id),+        ("sha1", hashImpl Algo.SHA1),+        ("sha2-256", hashImpl Algo.SHA256),+        ("sha2-512", hashImpl Algo.SHA512),+        ("sha3-256", hashImpl Algo.SHA3_256),+        ("sha3-512", hashImpl Algo.SHA3_512),+        ("sha3-224", hashImpl Algo.SHA3_224),+        ("sha3-384", hashImpl Algo.SHA3_384),+        ("sha3-512", hashImpl Algo.SHA3_512),+        ("keccak-224", hashImpl Algo.Keccak_224),+        ("keccak-256", hashImpl Algo.Keccak_256),+        ("keccak-384", hashImpl Algo.Keccak_384),+        ("keccak-512", hashImpl Algo.Keccak_512),+        ("blake3", Nothing),+        -- Shake has HashAlgorithms in Algo, but idk how to use them+        ("shake-128", Nothing),+        ("shake-256", Nothing),+        ("md5", hashImpl Algo.MD5),+        -- This can be implemented w/ composition+        ("dbl-sha2-256", Nothing)+      ]

@@ -0,0 +1,123 @@+-- | Module      : MultiFormats.VarInt+--   Description : Implements multiformat's varints+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+--+-- Implements serialization and extraction for multiformat's unsigned binary+-- varint spec. See: https://github.com/multiformats/unsigned-varint+module MultiFormats.VarInt+  ( VarInt,+    extractVarInt,+    serializeVarInt,+    maxVarInt,+  )+where++import Data.Bits ((.&.), (.<<.), (.>>.), (.|.))+import Data.ByteString (ByteString)+import Data.ByteString qualified as Bytes+import Data.Word (Word64, Word8)+import MultiFormats.VarInt.Errors (Error (..), Okay)++-- | VarInt spec uses unsigned 64 bit integers.+type VarInt = Word64++-- | Byte with MSB=1.+msb1 :: Word8+msb1 = 1 .<<. 7++-- | Byte with LSB=1.+lsb1 :: Word8+lsb1 = 1++-- | The value w/ MSB=1 and LSB=1.+msb1lsb1 :: Word8+msb1lsb1 = msb1 .|. lsb1++-- | The value that extracts all bits but the MSB.+masklower :: Word8+masklower = msb1 - 1++-- | The maximum value the spec allows (2^63-1).+maxVarInt :: VarInt+maxVarInt = (1 .<<. 63) - 1++-- | The maximum # of bytes a VarInt can occupy when encoded.+bytesCapacity :: Int+bytesCapacity = 9++-- | Splits ByteString into it's first occurring VarInt and the remaining+-- ByteString after.+spanVarInt :: ByteString -> Maybe (ByteString, ByteString)+spanVarInt bytes =+  -- Collect the bytes with MSB=1.+  case Bytes.span isMSB1 bytes of+    -- The varint is the leading bytes with the MSB=1 and a final terminating+    -- byte with MSB=0.+    (msb1s, msb0s)+      -- Verify if a final byte exists.+      | Bytes.null msb0s -> Nothing+      -- The loop invariant ensures msb + 1 has MSB=0. Add the last byte with+      -- splitAt since it is (a lot) more efficent than append.+      | otherwise -> Just (Bytes.splitAt (Bytes.length msb1s + 1) bytes)+  where+    isMSB1 byte = (byte .&. msb1) /= 0++-- | Concats the lower 7 bits from bytes into single int value.+buildVarInt :: ByteString -> VarInt+buildVarInt = Bytes.foldr (\byte int -> advance int .|. lower byte) 0+  where+    advance int = int .<<. 7+    lower byte = fromIntegral $ byte .&. masklower++-- | Checks edge case where input is invalid from not being a minimal encoding+-- of varints, (ie, we can fit 2 bytes of 7 bits into 1 byte of 7 bits). The+-- only case of this is when a final 0x8100 should be a 0x79... I think!+nonMinimal :: ByteString -> Bool+nonMinimal bytes = Bytes.unpack (Bytes.takeEnd 2 bytes) == [msb1lsb1, 0]++-- | Checks if a VarInt encoded ByteString overflows a Word64.+aboveCapacity :: ByteString -> Bool+aboveCapacity varbytes =+  let wholelen = Bytes.length varbytes+   in not (1 <= wholelen && wholelen <= bytesCapacity)++-- | Extracts the first minimally encoded varint from a ByteString.+extractVarInt :: ByteString -> Okay (VarInt, ByteString)+extractVarInt bytes+  | Bytes.null bytes = Left EmptyBytes+  | otherwise =+      case spanVarInt bytes of+        Nothing -> Left MissingTermination+        Just (varbytes, rest)+          | aboveCapacity varbytes -> Left BytesOverflow+          | nonMinimal varbytes -> Left NotMinimal+          | otherwise -> Right (buildVarInt varbytes, rest)++-- | Puts a parsed VarInt (Word64, without MSB indicators) into a ByteString+-- with MSB indicators, and a max size of 9 bytes.+serializeVarInt :: VarInt -> Okay ByteString+serializeVarInt varint+  | varint > maxVarInt = Left AboveMaxValue+  | otherwise =+      Right+        . zeroReplaceNull+        . Bytes.unfoldr setMSBs+        . Bytes.dropWhileEnd (== 0)+        $ Bytes.pack [varintGroup i varint | i <- [1 .. bytesCapacity]]+  where+    -- Extracts Nth group of 7 bits from VarInt.+    varintGroup n var = fromIntegral (var .>>. (7 * (n - 1))) .&. masklower+    -- Sets MSB=1 for leading bytes in unfoldr.+    setMSBs bytes =+      Bytes.uncons bytes >>= \(byte, rest) ->+        if Bytes.null rest+          then Just (byte, mempty)+          else Just (byte .|. msb1, rest)+    -- Replaces a null ByteString with a single zero.+    zeroReplaceNull bytes =+      if Bytes.null bytes+        then Bytes.singleton 0+        else bytes

@@ -0,0 +1,28 @@+-- | Module      : MultiFormats.VarInt.Errors+--   Description : Implements errors for MultiFormats.VarInt+--   Copyright   : Zoey McBride (c) 2026+--   License     : AGPL-3.0-or-later+--   Maintainer  : zoeymcbride@mailbox.org+--   Stability   : experimental+module MultiFormats.VarInt.Errors+  ( Error (..),+    Okay,+  )+where++-- | Functor for dealing with VarInt Error results.+type Okay a = Either Error a++-- | Errors for VarInts.+data Error+  = -- | If the provided VarInt ByteString is empty.+    EmptyBytes+  | -- | If the VarInt's ByteString is missing the MSB=0 terminating byte.+    MissingTermination+  | -- | If the ByteString can't fit the VarInt type.+    BytesOverflow+  | -- | If the VarInt violates the minimal encoding property.+    NotMinimal+  | -- | If the encoded VarInt is larger than allowed maximum.+    AboveMaxValue+  deriving (Eq, Show)