plugeth/les/commons.go
Péter Szilágyi 1e556d220c
all: remove notion of trusted checkpoints in the post-merge world (#27147)
* all: remove notion of trusted checkpoints in the post-merge world

* light: remove unused function

* eth/ethconfig, les: remove unused config option

* les: make linter happy

---------

Co-authored-by: Gary Rong <garyrong0905@gmail.com>
2023-04-24 09:37:10 +03:00

100 lines
3.6 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"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/ethconfig"
"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"
)
func errResp(code errCode, format string, v ...interface{}) error {
return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
}
type chainReader interface {
CurrentHeader() *types.Header
}
// lesCommons contains fields needed by both server and client.
type lesCommons struct {
genesis common.Hash
config *ethconfig.Config
chainConfig *params.ChainConfig
iConfig *light.IndexerConfig
chainDb, lesDb ethdb.Database
chainReader chainReader
chtIndexer, bloomTrieIndexer *core.ChainIndexer
closeCh chan struct{}
wg sync.WaitGroup
}
// 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=Mainnet, Rinkeby=4, Goerli=5)
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
}
// makeProtocols creates protocol descriptors for the given LES versions.
func (c *lesCommons) makeProtocols(versions []uint, runPeer func(version uint, p *p2p.Peer, rw p2p.MsgReadWriter) error, peerInfo func(id enode.ID) interface{}, dialCandidates enode.Iterator) []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(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
return runPeer(version, peer, rw)
},
PeerInfo: peerInfo,
DialCandidates: dialCandidates,
}
}
return protos
}
// nodeInfo retrieves some protocol metadata about the running host node.
func (c *lesCommons) nodeInfo() interface{} {
head := c.chainReader.CurrentHeader()
hash := head.Hash()
return &NodeInfo{
Network: c.config.NetworkId,
Difficulty: rawdb.ReadTd(c.chainDb, hash, head.Number.Uint64()),
Genesis: c.genesis,
Config: c.chainConfig,
Head: hash,
}
}