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// 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"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
type RemoteAgent struct {
work *types.Block
currentWork *types.Block
quit chan struct{}
workCh chan *types.Block
returnCh chan<- *types.Block
}
func NewRemoteAgent() *RemoteAgent {
agent := &RemoteAgent{}
return agent
}
func (a *RemoteAgent) Work() chan<- *types.Block {
return a.workCh
}
func (a *RemoteAgent) SetReturnCh(returnCh chan<- *types.Block) {
a.returnCh = returnCh
}
func (a *RemoteAgent) Start() {
a.quit = make(chan struct{})
a.workCh = make(chan *types.Block, 1)
go a.run()
}
func (a *RemoteAgent) Stop() {
close(a.quit)
close(a.workCh)
}
func (a *RemoteAgent) GetHashRate() int64 { return 0 }
func (a *RemoteAgent) run() {
out:
for {
select {
case <-a.quit:
break out
case work := <-a.workCh:
a.work = work
}
}
}
func (a *RemoteAgent) GetWork() [3]string {
var res [3]string
if a.work != nil {
a.currentWork = a.work
res[0] = a.work.HashNoNonce().Hex()
seedHash, _ := ethash.GetSeedHash(a.currentWork.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, a.work.Difficulty())
n.Lsh(n, 1)
res[2] = common.BytesToHash(n.Bytes()).Hex()
}
return res
}
func (a *RemoteAgent) SubmitWork(nonce uint64, mixDigest, seedHash common.Hash) bool {
// Return true or false, but does not indicate if the PoW was correct
// Make sure the external miner was working on the right hash
if a.currentWork != nil && a.work != nil {
a.returnCh <- a.currentWork.WithMiningResult(nonce, mixDigest)
//a.returnCh <- Work{a.currentWork.Number().Uint64(), nonce, mixDigest.Bytes(), seedHash.Bytes()}
return true
}
return false
}
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