Added Polkadot API reference docs

docs/ethereum_node_api.rst

@@ -76,7 +76,7 @@ Currently implemented the following Ethereum APIs in modules:
   ``personal_*``   `Network.Ethereum.Api.Personal <http://hackage.haskell.org/package/web3/docs/Network-Ethereum-Api-Personal.html>`_
  ===============  ================
 
-All modules use descriptive types according to official Ethereum specification. It placed at `Network.Ethereum.Api.Types <http://hackage.haskell.org/package/web3-0.8.1.0/docs/Network-Ethereum-Api-Types.html>`_.
+All modules use descriptive types according to official Ethereum specification. It placed at `Network.Ethereum.Api.Types <http://hackage.haskell.org/package/web3/docs/Network-Ethereum-Api-Types.html>`_.
 
 .. note::
    

docs/index.rst

@@ -8,6 +8,7 @@ Haskell Web3 Documentation
 
    getting_started
    ethereum_node_api
+   polkadot_node_api
    ethereum_accounts
    smart_contracts
    ipfs_client_api

docs/polkadot_node_api.rst

@@ -0,0 +1,50 @@
+Polkadot node API
+=================
+
+As same as Ethereum nodes Polkadot node exports HTTP/WebSockets `JSON-RPC` API. For connection with node **hs-web3** use internal tiny JSON-RPC client. 
+
+Lets try to call Polkadot node with ``runWeb3'`` function using ``ghci``.
+
+.. code-block:: haskell
+
+   > import Network.Web3.Provider
+   > import qualified Network.Polkadot.Api.System as System 
+   > runWeb3' (WsProvider "127.0.0.1" 9944) $ System.name
+   Right "Parity Polkadot"
+
+It can be useful to define function with Polkadot node endpoint location.
+
+.. code-block:: haskell
+
+   myNode :: Web3 a -> Either Web3Error a
+   myNode = runWeb3' (Wsprovider "127.0.0.1" 9944)
+
+API Reference
+~~~~~~~~~~~~~
+
+Currently implemented the following Polkadot APIs in modules:
+
+ ==================  ================
+  Method prefix       Implementation
+ ==================  ================
+  ``account_*``       `Network.Polkadot.Api.Account <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Account.html>`_
+  ``author_*``        `Network.Polkadot.Api.Author <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Author.html>`_
+  ``babe_*``          `Network.Polkadot.Api.Babe <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Babe.html>`_
+  ``chain_*``         `Network.Polkadot.Api.Chain <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Chain.html>`_
+  ``childstate_*``    `Network.Polkadot.Api.Childstate <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Childstate.html>`_
+  ``contracts_*``     `Network.Polkadot.Api.Contracts <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Contracts.html>`_
+  ``engine_*``        `Network.Polkadot.Api.Engine <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Engine.html>`_
+  ``grandpa_*``       `Network.Polkadot.Api.Grandpa <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Grandpa.html>`_
+  ``offchain_*``      `Network.Polkadot.Api.Offchain <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Offchain.html>`_
+  ``payment_*``       `Network.Polkadot.Api.Payment <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Payment.html>`_
+  ``rpc_*``           `Network.Polkadot.Api.Rpc <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Rpc.html>`_
+  ``state_*``         `Network.Polkadot.Api.State <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-State.html>`_
+  ``system_*``        `Network.Polkadot.Api.System <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-System.html>`_
+ ==================  ================
+
+All modules use descriptive types located at `Network.Polkadot.Api.Types <http://hackage.haskell.org/package/web3/docs/Network-Polkadot-Api-Types.html>`_.
+
+.. note::
+   
+   See classic API reference at `Hackage web3 page <http://hackage.haskell.org/package/web3>`_.
+

src/Network/Polkadot/Api/Rpc.hs

@@ -15,11 +15,11 @@
 
 module Network.Polkadot.Api.Rpc where
 
-import           Data.Text                  (Text)
+import           Data.Aeson                 (Value)
 
 import           Network.JsonRpc.TinyClient (JsonRpc (..))
 
 -- | Retrieves the list of RPC methods that are exposed by the node.
-methods :: JsonRpc m => m [Text]
+methods :: JsonRpc m => m Value
 {-# INLINE methods #-}
 methods = remote "rpc_methods"