github.com/phillinzzz/newBsc@v1.1.6/eth/peer.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package eth
    18  
    19  import (
    20  	"math/big"
    21  	"sync"
    22  	"time"
    23  
    24  	"github.com/phillinzzz/newBsc/eth/protocols/diff"
    25  	"github.com/phillinzzz/newBsc/eth/protocols/eth"
    26  	"github.com/phillinzzz/newBsc/eth/protocols/snap"
    27  )
    28  
    29  // ethPeerInfo represents a short summary of the `eth` sub-protocol metadata known
    30  // about a connected peer.
    31  type ethPeerInfo struct {
    32  	Version    uint     `json:"version"`    // Ethereum protocol version negotiated
    33  	Difficulty *big.Int `json:"difficulty"` // Total difficulty of the peer's blockchain
    34  	Head       string   `json:"head"`       // Hex hash of the peer's best owned block
    35  }
    36  
    37  // ethPeer is a wrapper around eth.Peer to maintain a few extra metadata.
    38  type ethPeer struct {
    39  	*eth.Peer
    40  	snapExt *snapPeer // Satellite `snap` connection
    41  	diffExt *diffPeer
    42  
    43  	syncDrop *time.Timer   // Connection dropper if `eth` sync progress isn't validated in time
    44  	snapWait chan struct{} // Notification channel for snap connections
    45  	lock     sync.RWMutex  // Mutex protecting the internal fields
    46  }
    47  
    48  // info gathers and returns some `eth` protocol metadata known about a peer.
    49  func (p *ethPeer) info() *ethPeerInfo {
    50  	hash, td := p.Head()
    51  
    52  	return &ethPeerInfo{
    53  		Version:    p.Version(),
    54  		Difficulty: td,
    55  		Head:       hash.Hex(),
    56  	}
    57  }
    58  
    59  // snapPeerInfo represents a short summary of the `snap` sub-protocol metadata known
    60  // about a connected peer.
    61  type snapPeerInfo struct {
    62  	Version uint `json:"version"` // Snapshot protocol version negotiated
    63  }
    64  
    65  // diffPeerInfo represents a short summary of the `diff` sub-protocol metadata known
    66  // about a connected peer.
    67  type diffPeerInfo struct {
    68  	Version  uint `json:"version"` // diff protocol version negotiated
    69  	DiffSync bool `json:"diff_sync"`
    70  }
    71  
    72  // snapPeer is a wrapper around snap.Peer to maintain a few extra metadata.
    73  type snapPeer struct {
    74  	*snap.Peer
    75  }
    76  
    77  // diffPeer is a wrapper around diff.Peer to maintain a few extra metadata.
    78  type diffPeer struct {
    79  	*diff.Peer
    80  }
    81  
    82  // info gathers and returns some `diff` protocol metadata known about a peer.
    83  func (p *diffPeer) info() *diffPeerInfo {
    84  	return &diffPeerInfo{
    85  		Version:  p.Version(),
    86  		DiffSync: p.DiffSync(),
    87  	}
    88  }
    89  
    90  // info gathers and returns some `snap` protocol metadata known about a peer.
    91  func (p *snapPeer) info() *snapPeerInfo {
    92  	return &snapPeerInfo{
    93  		Version: p.Version(),
    94  	}
    95  }