Monthly Downloads: 10
Programming language: Haskell
License: MIT License
Tags: Web     API    
Latest version: v0.1.1.2

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Haskell JSON-RPC client for PegNet daemon

Hackage License

A JSON-RPC Haskell client for the PegNet API daemon. Allows retrieval of data from PegNet dApp. Each response has special ADT(algebraic data type) that automatically converted from JSON response. Using Remote Monad pattern multiple request can be batched and executed simulatenously, following more robust approach and reducing usage of expensive RPC calls.

Choosing a batching strategy. There are two strategies:

  • Weak - a single command or a single procedure, or
  • Strong - a sequence of commands, optionally terminated by a procedure
  1. Installation
  2. Usage
  3. Contributions


You can install package from Hackage and build with Cabal, but we recommend to use Stack tool. Add to you dependencies in stack.yaml and cabal file dependency - api-rpc-pegnet.

To run and test from repository:

  1. Build with stack

    $ stack build
  2. Load REPL with stack for evaluation

    $ stack repl
  3. execute required methods


for basic daemon functionality

  1. import with
import PegNet.RPC.Api

or load in REPL.

  1. build communication session with

    weakSession (traceSendAPI "" $ clientSendAPIWithAlt endpoint)
  2. run required methods inside RPC monad


You can construct simple session with all methods available for further processings. Check following execution

main = do
  -- build communication session
  let s = weakSession $ traceSendAPI "" $ clientSendAPIWithAlt endpointRemote
  (h, i) <- send s $ do
         h <- reqGetSyncStatus
         i <- reqPegNetIssuance
         b <- reqPegNetBalances "FA38cwer93mmPw1HxjScLmK1yF9iJTu5P87T2vdkbuLovm2YXyss"
         t <- reqGetTransaction "0-e4380e6334b0c42d4d6155fbd1378050b91c02a0df93d7fdfe6656f94c61e7eb"
         r <- reqPegNetRates 213000
         s <- reqGetTransactionStatus "a33d4f334a2658c17d3f44158af75f1c32cc6b2f3de9ddc337064c93043d8db0"
         rich <- reqGetRichList (Just "PEG") 5

         -- return values as N-ary tuple
         return (h, i)
  -- process resulted values
  print h
  -- or use for special business logic

Variables h and i mapped to exact data stucture. All types available for detailed overview in Types directory.


Please, feel free to contribute, fork the repo and submit PR.

Say thanks, send a tip:

  • btc: 39oVXpsgsyW8ZgzsnX3sV7HLdtXWfT96qN
  • fct: FA38cwer93mmPw1HxjScLmK1yF9iJTu5P87T2vdkbuLovm2YXyss
  • eth: 0x9cDBA6bb44772259B3A3fb89cf233A147a720f34

*Note that all licence references and agreements mentioned in the api-rpc-pegnet README section above are relevant to that project's source code only.