109 lines
3.9 KiB
Go
109 lines
3.9 KiB
Go
// 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/enode"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
// lesCommons contains fields needed by both server and client.
|
|
type lesCommons struct {
|
|
config *eth.Config
|
|
iConfig *light.IndexerConfig
|
|
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 params.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 enode.ID) 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 params.TrustedCheckpoint
|
|
sections, _, _ := c.chtIndexer.Sections()
|
|
sections2, _, _ := c.bloomTrieIndexer.Sections()
|
|
|
|
if sections2 < sections {
|
|
sections = sections2
|
|
}
|
|
if sections > 0 {
|
|
sectionIndex := sections - 1
|
|
sectionHead := c.bloomTrieIndexer.SectionHead(sectionIndex)
|
|
cht = params.TrustedCheckpoint{
|
|
SectionIndex: 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,
|
|
}
|
|
}
|