path: root/rpc/api/net.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package api

import (
    "github.com/ethereum/go-ethereum/eth"
    "github.com/ethereum/go-ethereum/rpc/codec"
    "github.com/ethereum/go-ethereum/rpc/shared"
    "github.com/ethereum/go-ethereum/xeth"
)

const (
    NetApiVersion = "1.0"
)

var (
    // mapping between methods and handlers
    netMapping = map[string]nethandler{
        "net_peerCount": (*netApi).PeerCount,
        "net_listening": (*netApi).IsListening,
        "net_version": (*netApi).Version,
    }
)

// net callback handler
type nethandler func(*netApi, *shared.Request) (interface{}, error)

// net api provider
type netApi struct {
    xeth     *xeth.XEth
    ethereum *eth.Ethereum
    methods  map[string]nethandler
    codec    codec.ApiCoder
}

// create a new net api instance
func NewNetApi(xeth *xeth.XEth, eth *eth.Ethereum, coder codec.Codec) *netApi {
    return &netApi{
        xeth:     xeth,
        ethereum: eth,
        methods:  netMapping,
        codec:    coder.New(nil),
    }
}

// collection with supported methods
func (self *netApi) Methods() []string {
    methods := make([]string, len(self.methods))
    i := 0
    for k := range self.methods {
        methods[i] = k
        i++
    }
    return methods
}

// Execute given request
func (self *netApi) Execute(req *shared.Request) (interface{}, error) {
    if callback, ok := self.methods[req.Method]; ok {
        return callback(self, req)
    }

    return nil, shared.NewNotImplementedError(req.Method)
}

func (self *netApi) Name() string {
    return shared.NetApiName
}

func (self *netApi) ApiVersion() string {
    return NetApiVersion
}

// Number of connected peers
func (self *netApi) PeerCount(req *shared.Request) (interface{}, error) {
    return newHexNum(self.xeth.PeerCount()), nil
}

func (self *netApi) IsListening(req *shared.Request) (interface{}, error) {
    return self.xeth.IsListening(), nil
}

func (self *netApi) Version(req *shared.Request) (interface{}, error) {
    return self.xeth.NetworkVersion(), nil
}