ipfs: Access IPFS locally and remotely

[ apache, library, network ] [ Propose Tags ]

Interact with the IPFS network by shelling out to a local IPFS node or communicating via the HTTP interface of a remote IPFS node.

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Versions [RSS] [faq] 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.1.0, 1.1.1, 1.1.2, 1.1.3,,,,,,,,,, 1.3.1
Dependencies aeson, base (<5), bytestring, envy, flow, Glob, http-media, ip, lens, monad-logger, regex-compat, rio, servant, servant-client, servant-multipart, servant-server, swagger2, text, vector [details]
License Apache-2.0
Copyright © 2021 Fission Internet Software Services for Open Networks Inc.
Author Brooklyn Zelenka, Daniel Holmgren, Steven Vandevelde, James Walker
Maintainer brooklyn@fission.codes, daniel@fission.codes, steven@fission.codes, james@fission.codes
Category Network
Home page https://github.com/fission-suite/ipfs-haskell#readme
Bug tracker https://github.com/fission-suite/ipfs-haskell/issues
Source repo head: git clone https://github.com/fission-suite/ipfs-haskell
Uploaded by expede at 2021-03-11T01:43:00Z
Distributions NixOS:
Downloads 2153 total (278 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2021-03-11 [all 1 reports]


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Documentation: ipfs on hackage

A library for integrating IPFS into your haskell applications. Interact with the IPFS network by shelling out to a local IPFS node or communicating via the HTTP interface of a remote node.


Define instances for MonadLocalIPFS and/or MonadRemoteIPFS. Each requires only one function:

class Monad m => MonadRemoteIPFS m where
  runRemote :: Servant.ClientM a -> m (Either Servant.ClientError a)

class Monad m => MonadLocalIPFS m where
  runLocal ::
    -> Lazy.ByteString
    -> m (Either Process.Error Process.RawMessage)

We use RIO processes to shell out to a local IPFS node and Servant for HTTP requests to a remote node.

After that, simply add MonadLocalIPFS m as a constraint to a function and you'll be able to call IPFS within it. For instance:

import           Network.IPFS
import qualified Network.IPFS.Add        as IPFS
import           Network.IPFS.File.Types as File

add ::
  MonadLocalIPFS  m
  => File.Serialzed
  -> m ()
add (Serialized rawData) = IPFS.addRaw rawData >>= \case
  Right newCID -> 
    -- ...
  Left err ->
    -- ...

You can see example instances below:

  ( HasProcessContext cfg
  , HasLogFunc cfg
  , Has IPFS.BinPath cfg
  , Has IPFS.Timeout cfg
  => MonadLocalIPFS (RIO cfg) where
    runLocal opts arg = do
      IPFS.BinPath ipfs <- view hasLens
      IPFS.Timeout secs <- view hasLens
      let opts' = ("--timeout=" <> show secs <> "s") : opts

      runProc readProcess ipfs (byteStringInput arg) byteStringOutput opts' >>= \case
        (ExitSuccess, contents, _) ->
          return $ Right contents
        (ExitFailure _, _, stdErr)
          | Lazy.isSuffixOf "context deadline exceeded" stdErr ->
              return . Left $ Process.Timeout secs
          | otherwise ->
            return . Left $ Process.UnknownErr stdErr

  ( Has IPFS.URL     cfg
  , Has HTTP.Manager cfg
  => MonadRemoteIPFS (RIO cfg) where
    runRemote query = do
      IPFS.URL url <- view hasLens
      manager      <- view hasLens

        & mkClientEnv manager
        & runClientM query
        & liftIO