web3: Web3 API for Haskell.

Versions [RSS]	0.3.2.0, 0.3.2.1, 0.3.3.0, 0.3.4.0, 0.4.0.0, 0.4.1.0, 0.5.0.0, 0.5.1.0, 0.5.2.0, 0.5.2.1, 0.5.3.0, 0.5.4.0, 0.5.5.0, 0.6.0.0, 0.7.0.0, 0.7.1.0, 0.7.2.0, 0.7.3.0, 0.8.0.0, 0.8.1.0, 0.8.2.0, 0.8.2.1, 0.8.3.0, 0.8.3.1, 0.8.3.2, 0.8.4.0, 0.9.0.0, 0.9.1.0, 1.0.0.0, 1.0.1.0
Change log	CHANGELOG.md
Dependencies	aeson (>=1.2.2.0 && <1.5), async (>=2.1.1.1 && <2.3), attoparsec (>=0.13.2.1 && <0.14), base (>4.11 && <4.14), base58string (>=0.10.0 && <0.11), basement (>=0.0.4 && <0.1), bitvec (>=1.0.0 && <2.0), bytestring (>=0.10.8.1 && <0.11), cereal (>=0.5.4.0 && <0.6), cryptonite (>=0.23 && <0.27), data-default (>=0.7.1.1 && <0.8), errors (>=2.2 && <2.4), exceptions (>=0.8.3 && <0.11), generics-sop (>=0.3.1.0 && <0.6), hspec (>=2.4 && <2.8), http-client (>=0.5.7.1 && <0.7), http-client-tls (>=0.3.5.1 && <0.4), http-media (>=0.7 && <0.8.1), http-types (>=0.12 && <0.14), machines (>=0.6.3 && <0.8), memory (>=0.14.11 && <0.16), microlens (>=0.4.8.1 && <0.5), microlens-aeson (>=2.2.0.2 && <2.4), microlens-mtl (>=0.1.11.0 && <0.3), microlens-th (>=0.4.1.1 && <0.5), mtl (>=2.2.1 && <2.3), network (>=2.6 && <3.2), OneTuple (>=0.2.1 && <0.3), parsec (>=3.1.11 && <3.2), relapse (>=1.0.0.0 && <2.0), servant (>=0.13 && <0.17), servant-client (>=0.13 && <0.17), tagged (>=0.8.5 && <0.9), tar (>=0.5 && <0.6), template-haskell (>=2.12 && <2.16), text (>=1.2.2.2 && <1.3), transformers (>=0.5.2.0 && <0.6), unordered-containers (>=0.2 && <0.3), uuid-types (>=1.0.3 && <1.1), vector (>=0.12 && <0.13), vinyl (>=0.5.3 && <0.13), websockets (>=0.11 && <0.13) [details]
License	BSD-3-Clause
Copyright	(c) Alexander Krupenkin 2016
Author	Alexander Krupenkin
Maintainer	mail@akru.me
Category	Network
Home page	https://github.com/airalab/hs-web3#readme
Bug tracker	https://github.com/airalab/hs-web3/issues
Source repo	head: git clone https://github.com/airalab/hs-web3
Uploaded	by akru at 2020-06-07T05:40:25Z
Distributions
Reverse Dependencies	2 direct, 0 indirect [details]
Downloads	15636 total (71 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
Your Rating	λ λ λ
Status	Docs uploaded by user Build status unknown [no reports yet]

Readme for web3-0.9.1.0

[back to package description]

Web3 API for Haskell

This library implements Haskell API client for popular Web3 platforms.

Install

stack install web3

Usage

{-# LANGUAGE OverloadedStrings #-}
module Main where

-- Basic imports
import           Network.Ethereum
import           Network.Web3

-- Eth API support
import qualified Network.Ethereum.Api.Eth   as Eth
import           Network.Ethereum.Api.Types

-- ENS support
import qualified Network.Ethereum.Ens       as Ens

-- Lens to simple param setting
import           Lens.Micro                 ((.~))

main :: IO ()
main = do
    -- Use default provider on http://localhost:8545
    ret <- runWeb3 $ do

        -- Get address of default account
        me <- head <$> Eth.accounts

        -- Get balance of default account on latest block
        myBalance <- Eth.getBalance me Latest

        -- Get half of balance
        let halfBalance = fromWei (myBalance / 2)

        -- Use default account
        withAccount () $ do
            -- Get Ethereum address via ENS
            alice <- Ens.resolve "alice.address.on.eth"
            bob   <- Ens.resolve "bob.address.on.eth"

            -- Send transaction with value
            withParam (value .~ halfBalance) $ do

                -- Send transaction to alice account
                withParam (to .~ alice) $ send ()

                -- Send transaction to bob account
                withParam (to .~ bob) $ send ()

        -- Return sended value
        return halfBalance

    -- Web3 error handling
    case ret of
        Left e  -> error $ show e
        Right v -> print (v :: Ether)  -- Print returned value in ethers

Read more in the documentation on ReadTheDocs.