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package miner

import (
    "math/big"

    "github.com/ethereum/ethash"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/pow"
)

var minerlogger = logger.NewLogger("MINER")

type Miner struct {
    worker *worker

    MinAcceptedGasPrice *big.Int
    Extra               string

    mining bool
    eth    core.Backend
    pow    pow.PoW
}

func New(eth core.Backend, pow pow.PoW, minerThreads int) *Miner {
    // note: minerThreads is currently ignored because
    // ethash is not thread safe.
    return &Miner{eth: eth, pow: pow}
}

func (self *Miner) Mining() bool {
    return self.mining
}

func (self *Miner) Start(coinbase common.Address) {
    self.mining = true
    self.worker = newWorker(coinbase, self.eth)
    self.worker.register(NewCpuMiner(0, self.pow))

    self.pow.(*ethash.Ethash).UpdateDAG()

    self.worker.start()
    self.worker.commitNewWork()
}

func (self *Miner) Stop() {
    self.mining = false
    self.worker.stop()

    //self.pow.(*ethash.Ethash).Stop()
}

func (self *Miner) HashRate() int64 {
    return self.worker.HashRate()
}