1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
// Copyright 2018 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 les
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
)
// lesCommons contains fields needed by both server and client.
type lesCommons struct {
config *eth.Config
chainDb ethdb.Database
protocolManager *ProtocolManager
chtIndexer, bloomTrieIndexer *core.ChainIndexer
}
// NodeInfo represents a short summary of the Ethereum sub-protocol metadata
// known about the host peer.
type NodeInfo struct {
Network uint64 `json:"network"` // Ethereum network ID (1=Frontier, 2=Morden, Ropsten=3, Rinkeby=4)
Difficulty *big.Int `json:"difficulty"` // Total difficulty of the host's blockchain
Genesis common.Hash `json:"genesis"` // SHA3 hash of the host's genesis block
Config *params.ChainConfig `json:"config"` // Chain configuration for the fork rules
Head common.Hash `json:"head"` // SHA3 hash of the host's best owned block
CHT light.TrustedCheckpoint `json:"cht"` // Trused CHT checkpoint for fast catchup
}
// makeProtocols creates protocol descriptors for the given LES versions.
func (c *lesCommons) makeProtocols(versions []uint) []p2p.Protocol {
protos := make([]p2p.Protocol, len(versions))
for i, version := range versions {
version := version
protos[i] = p2p.Protocol{
Name: "les",
Version: version,
Length: ProtocolLengths[version],
NodeInfo: c.nodeInfo,
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
return c.protocolManager.runPeer(version, p, rw)
},
PeerInfo: func(id discover.NodeID) interface{} {
if p := c.protocolManager.peers.Peer(fmt.Sprintf("%x", id[:8])); p != nil {
return p.Info()
}
return nil
},
}
}
return protos
}
// nodeInfo retrieves some protocol metadata about the running host node.
func (c *lesCommons) nodeInfo() interface{} {
var cht light.TrustedCheckpoint
sections, _, sectionHead := c.chtIndexer.Sections()
sections2, _, sectionHead2 := c.bloomTrieIndexer.Sections()
if sections2 < sections {
sections = sections2
sectionHead = sectionHead2
}
if sections > 0 {
sectionIndex := sections - 1
cht = light.TrustedCheckpoint{
SectionIdx: sectionIndex,
SectionHead: sectionHead,
CHTRoot: light.GetChtRoot(c.chainDb, sectionIndex, sectionHead),
BloomRoot: light.GetBloomTrieRoot(c.chainDb, sectionIndex, sectionHead),
}
}
chain := c.protocolManager.blockchain
head := chain.CurrentHeader()
hash := head.Hash()
return &NodeInfo{
Network: c.config.NetworkId,
Difficulty: chain.GetTd(hash, head.Number.Uint64()),
Genesis: chain.Genesis().Hash(),
Config: chain.Config(),
Head: chain.CurrentHeader().Hash(),
CHT: cht,
}
}
|
