mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-23 12:07:17 +00:00
a5d08c893d
This commit does various code refactorings: - generalizes and moves the request retrieval/timeout/resend logic out of LesOdr (will be used by a subsequent PR) - reworks the peer management logic so that all services can register with peerSet to get notified about added/dropped peers (also gets rid of the ugly getAllPeers callback in requestDistributor) - moves peerSet, LesOdr, requestDistributor and retrieveManager initialization out of ProtocolManager because I believe they do not really belong there and the whole init process was ugly and ad-hoc
95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
// Copyright 2016 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 (
|
|
"context"
|
|
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/light"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
)
|
|
|
|
// LesOdr implements light.OdrBackend
|
|
type LesOdr struct {
|
|
db ethdb.Database
|
|
stop chan struct{}
|
|
retriever *retrieveManager
|
|
}
|
|
|
|
func NewLesOdr(db ethdb.Database, retriever *retrieveManager) *LesOdr {
|
|
return &LesOdr{
|
|
db: db,
|
|
retriever: retriever,
|
|
stop: make(chan struct{}),
|
|
}
|
|
}
|
|
|
|
func (odr *LesOdr) Stop() {
|
|
close(odr.stop)
|
|
}
|
|
|
|
func (odr *LesOdr) Database() ethdb.Database {
|
|
return odr.db
|
|
}
|
|
|
|
const (
|
|
MsgBlockBodies = iota
|
|
MsgCode
|
|
MsgReceipts
|
|
MsgProofs
|
|
MsgHeaderProofs
|
|
)
|
|
|
|
// Msg encodes a LES message that delivers reply data for a request
|
|
type Msg struct {
|
|
MsgType int
|
|
ReqID uint64
|
|
Obj interface{}
|
|
}
|
|
|
|
// Retrieve tries to fetch an object from the LES network.
|
|
// If the network retrieval was successful, it stores the object in local db.
|
|
func (self *LesOdr) Retrieve(ctx context.Context, req light.OdrRequest) (err error) {
|
|
lreq := LesRequest(req)
|
|
|
|
reqID := genReqID()
|
|
rq := &distReq{
|
|
getCost: func(dp distPeer) uint64 {
|
|
return lreq.GetCost(dp.(*peer))
|
|
},
|
|
canSend: func(dp distPeer) bool {
|
|
p := dp.(*peer)
|
|
return lreq.CanSend(p)
|
|
},
|
|
request: func(dp distPeer) func() {
|
|
p := dp.(*peer)
|
|
cost := lreq.GetCost(p)
|
|
p.fcServer.QueueRequest(reqID, cost)
|
|
return func() { lreq.Request(reqID, p) }
|
|
},
|
|
}
|
|
|
|
if err = self.retriever.retrieve(ctx, reqID, rq, func(p distPeer, msg *Msg) error { return lreq.Validate(self.db, msg) }); err == nil {
|
|
// retrieved from network, store in db
|
|
req.StoreResult(self.db)
|
|
} else {
|
|
log.Debug("Failed to retrieve data from network", "err", err)
|
|
}
|
|
return
|
|
}
|