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path: root/rpc/miner_agest.go
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package rpc

import (
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/miner"
)

type Agent struct {
    work        *types.Block
    currentWork *types.Block

    quit     chan struct{}
    workCh   chan *types.Block
    returnCh chan<- miner.Work
}

func NewAgent() *Agent {
    agent := &Agent{}
    go agent.run()

    return agent
}

func (a *Agent) Work() chan<- *types.Block {
    return a.workCh
}

func (a *Agent) SetWorkCh(returnCh chan<- miner.Work) {
    a.returnCh = returnCh
}

func (a *Agent) Start() {
    a.quit = make(chan struct{})
    a.workCh = make(chan *types.Block, 1)
}

func (a *Agent) Stop() {
    close(a.quit)
    close(a.workCh)
}

func (a *Agent) GetHashRate() int64 { return 0 }

func (a *Agent) run() {
out:
    for {
        select {
        case <-a.quit:
            break out
        case work := <-a.workCh:
            a.work = work
        }
    }
}

func (a *Agent) GetWork() common.Hash {
    // TODO return HashNoNonce, DAGSeedHash, Difficulty

    // XXX Wait here untill work != nil ?.
    if a.work != nil {
        return a.work.HashNoNonce()
    }
    return common.Hash{}
}

func (a *Agent) SetResult(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.currentWork.Hash() == a.work.Hash() {
        a.returnCh <- miner.Work{a.currentWork.Number().Uint64(), nonce, mixDigest.Bytes(), seedHash.Bytes()}
        return true
    }

    return false
}