mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 04:47:17 +00:00
92580d69d3
This commit affects p2p/discv5 "topic discovery" by running it on the same UDP port where the old discovery works. This is realized by giving an "unhandled" packet channel to the old v4 discovery packet handler where all invalid packets are sent. These packets are then processed by v5. v5 packets are always invalid when interpreted by v4 and vice versa. This is ensured by adding one to the first byte of the packet hash in v5 packets. DiscoveryV5Bootnodes is also changed to point to new bootnodes that are implementing the changed packet format with modified hash. Existing and new v5 bootnodes are both running on different ports ATM.
209 lines
7.0 KiB
Go
209 lines
7.0 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains all the wrappers from the node package to support client side node
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// management on mobile platforms.
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package geth
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import (
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"encoding/json"
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"fmt"
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"path/filepath"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/ethclient"
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"github.com/ethereum/go-ethereum/ethstats"
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"github.com/ethereum/go-ethereum/les"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/nat"
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"github.com/ethereum/go-ethereum/params"
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whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
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)
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// NodeConfig represents the collection of configuration values to fine tune the Geth
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// node embedded into a mobile process. The available values are a subset of the
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// entire API provided by go-ethereum to reduce the maintenance surface and dev
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// complexity.
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type NodeConfig struct {
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// Bootstrap nodes used to establish connectivity with the rest of the network.
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BootstrapNodes *Enodes
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// MaxPeers is the maximum number of peers that can be connected. If this is
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// set to zero, then only the configured static and trusted peers can connect.
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MaxPeers int
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// EthereumEnabled specifies whether the node should run the Ethereum protocol.
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EthereumEnabled bool
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// EthereumNetworkID is the network identifier used by the Ethereum protocol to
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// decide if remote peers should be accepted or not.
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EthereumNetworkID int64 // uint64 in truth, but Java can't handle that...
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// EthereumGenesis is the genesis JSON to use to seed the blockchain with. An
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// empty genesis state is equivalent to using the mainnet's state.
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EthereumGenesis string
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// EthereumDatabaseCache is the system memory in MB to allocate for database caching.
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// A minimum of 16MB is always reserved.
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EthereumDatabaseCache int
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// EthereumNetStats is a netstats connection string to use to report various
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// chain, transaction and node stats to a monitoring server.
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//
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// It has the form "nodename:secret@host:port"
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EthereumNetStats string
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// WhisperEnabled specifies whether the node should run the Whisper protocol.
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WhisperEnabled bool
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}
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// defaultNodeConfig contains the default node configuration values to use if all
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// or some fields are missing from the user's specified list.
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var defaultNodeConfig = &NodeConfig{
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BootstrapNodes: FoundationBootnodes(),
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MaxPeers: 25,
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EthereumEnabled: true,
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EthereumNetworkID: 1,
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EthereumDatabaseCache: 16,
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}
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// NewNodeConfig creates a new node option set, initialized to the default values.
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func NewNodeConfig() *NodeConfig {
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config := *defaultNodeConfig
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return &config
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}
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// Node represents a Geth Ethereum node instance.
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type Node struct {
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node *node.Node
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}
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// NewNode creates and configures a new Geth node.
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func NewNode(datadir string, config *NodeConfig) (stack *Node, _ error) {
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// If no or partial configurations were specified, use defaults
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if config == nil {
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config = NewNodeConfig()
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}
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if config.MaxPeers == 0 {
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config.MaxPeers = defaultNodeConfig.MaxPeers
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}
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if config.BootstrapNodes == nil || config.BootstrapNodes.Size() == 0 {
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config.BootstrapNodes = defaultNodeConfig.BootstrapNodes
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}
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// Create the empty networking stack
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nodeConf := &node.Config{
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Name: clientIdentifier,
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Version: params.Version,
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DataDir: datadir,
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KeyStoreDir: filepath.Join(datadir, "keystore"), // Mobile should never use internal keystores!
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P2P: p2p.Config{
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NoDiscovery: true,
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DiscoveryV5: true,
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BootstrapNodesV5: config.BootstrapNodes.nodes,
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ListenAddr: ":0",
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NAT: nat.Any(),
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MaxPeers: config.MaxPeers,
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},
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}
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rawStack, err := node.New(nodeConf)
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if err != nil {
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return nil, err
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}
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var genesis *core.Genesis
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if config.EthereumGenesis != "" {
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// Parse the user supplied genesis spec if not mainnet
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genesis = new(core.Genesis)
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if err := json.Unmarshal([]byte(config.EthereumGenesis), genesis); err != nil {
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return nil, fmt.Errorf("invalid genesis spec: %v", err)
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}
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// If we have the testnet, hard code the chain configs too
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if config.EthereumGenesis == TestnetGenesis() {
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genesis.Config = params.TestnetChainConfig
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if config.EthereumNetworkID == 1 {
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config.EthereumNetworkID = 3
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}
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}
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}
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// Register the Ethereum protocol if requested
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if config.EthereumEnabled {
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ethConf := eth.DefaultConfig
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ethConf.Genesis = genesis
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ethConf.SyncMode = downloader.LightSync
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ethConf.NetworkId = uint64(config.EthereumNetworkID)
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ethConf.DatabaseCache = config.EthereumDatabaseCache
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if err := rawStack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
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return les.New(ctx, ðConf)
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}); err != nil {
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return nil, fmt.Errorf("ethereum init: %v", err)
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}
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// If netstats reporting is requested, do it
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if config.EthereumNetStats != "" {
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if err := rawStack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
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var lesServ *les.LightEthereum
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ctx.Service(&lesServ)
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return ethstats.New(config.EthereumNetStats, nil, lesServ)
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}); err != nil {
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return nil, fmt.Errorf("netstats init: %v", err)
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}
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}
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}
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// Register the Whisper protocol if requested
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if config.WhisperEnabled {
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if err := rawStack.Register(func(*node.ServiceContext) (node.Service, error) {
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return whisper.New(&whisper.DefaultConfig), nil
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}); err != nil {
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return nil, fmt.Errorf("whisper init: %v", err)
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}
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}
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return &Node{rawStack}, nil
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}
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// Start creates a live P2P node and starts running it.
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func (n *Node) Start() error {
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return n.node.Start()
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}
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// Stop terminates a running node along with all it's services. In the node was
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// not started, an error is returned.
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func (n *Node) Stop() error {
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return n.node.Stop()
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}
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// GetEthereumClient retrieves a client to access the Ethereum subsystem.
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func (n *Node) GetEthereumClient() (client *EthereumClient, _ error) {
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rpc, err := n.node.Attach()
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if err != nil {
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return nil, err
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}
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return &EthereumClient{ethclient.NewClient(rpc)}, nil
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}
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// GetNodeInfo gathers and returns a collection of metadata known about the host.
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func (n *Node) GetNodeInfo() *NodeInfo {
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return &NodeInfo{n.node.Server().NodeInfo()}
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}
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// GetPeersInfo returns an array of metadata objects describing connected peers.
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func (n *Node) GetPeersInfo() *PeerInfos {
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return &PeerInfos{n.node.Server().PeersInfo()}
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}
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