e870e61bc9
Work is now handled and carried over multiple sessions. Previously one session only was assumed, potentially resulting in invalid (outdated) work * Larger work / result queue * Full validation option
137 lines
3.1 KiB
Go
137 lines
3.1 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum 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.
|
|
//
|
|
// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package miner
|
|
|
|
import (
|
|
"math/big"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/ethash"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/logger/glog"
|
|
)
|
|
|
|
type RemoteAgent struct {
|
|
mu sync.Mutex
|
|
|
|
quit chan struct{}
|
|
workCh chan *Work
|
|
returnCh chan<- *Result
|
|
|
|
currentWork *Work
|
|
work map[common.Hash]*Work
|
|
}
|
|
|
|
func NewRemoteAgent() *RemoteAgent {
|
|
agent := &RemoteAgent{work: make(map[common.Hash]*Work)}
|
|
|
|
return agent
|
|
}
|
|
|
|
func (a *RemoteAgent) Work() chan<- *Work {
|
|
return a.workCh
|
|
}
|
|
|
|
func (a *RemoteAgent) SetReturnCh(returnCh chan<- *Result) {
|
|
a.returnCh = returnCh
|
|
}
|
|
|
|
func (a *RemoteAgent) Start() {
|
|
a.quit = make(chan struct{})
|
|
a.workCh = make(chan *Work, 1)
|
|
go a.maintainLoop()
|
|
}
|
|
|
|
func (a *RemoteAgent) Stop() {
|
|
close(a.quit)
|
|
close(a.workCh)
|
|
}
|
|
|
|
func (a *RemoteAgent) GetHashRate() int64 { return 0 }
|
|
|
|
func (a *RemoteAgent) GetWork() [3]string {
|
|
a.mu.Lock()
|
|
defer a.mu.Unlock()
|
|
|
|
var res [3]string
|
|
|
|
if a.currentWork != nil {
|
|
block := a.currentWork.Block
|
|
|
|
res[0] = block.HashNoNonce().Hex()
|
|
seedHash, _ := ethash.GetSeedHash(block.NumberU64())
|
|
res[1] = common.BytesToHash(seedHash).Hex()
|
|
// Calculate the "target" to be returned to the external miner
|
|
n := big.NewInt(1)
|
|
n.Lsh(n, 255)
|
|
n.Div(n, block.Difficulty())
|
|
n.Lsh(n, 1)
|
|
res[2] = common.BytesToHash(n.Bytes()).Hex()
|
|
|
|
a.work[block.HashNoNonce()] = a.currentWork
|
|
}
|
|
|
|
return res
|
|
}
|
|
|
|
// Returns true or false, but does not indicate if the PoW was correct
|
|
func (a *RemoteAgent) SubmitWork(nonce uint64, mixDigest, hash common.Hash) bool {
|
|
a.mu.Lock()
|
|
defer a.mu.Unlock()
|
|
|
|
// Make sure the work submitted is present
|
|
if a.work[hash] != nil {
|
|
block := a.work[hash].Block.WithMiningResult(nonce, mixDigest)
|
|
a.returnCh <- &Result{a.work[hash], block}
|
|
|
|
delete(a.work, hash)
|
|
|
|
return true
|
|
} else {
|
|
glog.V(logger.Info).Infof("Work was submitted for %x but no pending work found\n", hash)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (a *RemoteAgent) maintainLoop() {
|
|
ticker := time.Tick(5 * time.Second)
|
|
|
|
out:
|
|
for {
|
|
select {
|
|
case <-a.quit:
|
|
break out
|
|
case work := <-a.workCh:
|
|
a.mu.Lock()
|
|
a.currentWork = work
|
|
a.mu.Unlock()
|
|
case <-ticker:
|
|
// cleanup
|
|
a.mu.Lock()
|
|
for hash, work := range a.work {
|
|
if time.Since(work.createdAt) > 7*(12*time.Second) {
|
|
delete(a.work, hash)
|
|
}
|
|
}
|
|
a.mu.Unlock()
|
|
}
|
|
}
|
|
}
|