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consensus/ethash: refactor remote sealer (#20335)

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The original idea behind this change was to remove a use of the
deprecated CancelRequest method. Simply removing it would've been an
option, but I couldn't resist and did a bit of a refactoring instead.

All remote sealing code was contained in a single giant function. Remote
sealing is now extracted into its own object, remoteSealer.
This commit is contained in:
Felix Lange
2019-11-28 10:51:57 +01:00
committed by GitHub
parent c9f28ca8e5
commit a91b704b01
5 changed files with 291 additions and 301 deletions
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26
consensus/ethash/api.go
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@@ -28,7 +28,7 @@ var errEthashStopped = errors.New("ethash stopped")
// API exposes ethash related methods for the RPC interface.
type API struct {
ethash *Ethash // Make sure the mode of ethash is normal.
ethash *Ethash
}
// GetWork returns a work package for external miner.
@@ -39,7 +39,7 @@ type API struct {
// result[2] - 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
// result[3] - hex encoded block number
func (api *API) GetWork() ([4]string, error) {
if api.ethash.config.PowMode != ModeNormal && api.ethash.config.PowMode != ModeTest {
if api.ethash.remote == nil {
return [4]string{}, errors.New("not supported")
}
@@ -47,13 +47,11 @@ func (api *API) GetWork() ([4]string, error) {
workCh = make(chan [4]string, 1)
errc = make(chan error, 1)
)
select {
case api.ethash.fetchWorkCh <- &sealWork{errc: errc, res: workCh}:
case <-api.ethash.exitCh:
case api.ethash.remote.fetchWorkCh <- &sealWork{errc: errc, res: workCh}:
case <-api.ethash.remote.exitCh:
return [4]string{}, errEthashStopped
}
select {
case work := <-workCh:
return work, nil
@@ -66,23 +64,21 @@ func (api *API) GetWork() ([4]string, error) {
// It returns an indication if the work was accepted.
// Note either an invalid solution, a stale work a non-existent work will return false.
func (api *API) SubmitWork(nonce types.BlockNonce, hash, digest common.Hash) bool {
if api.ethash.config.PowMode != ModeNormal && api.ethash.config.PowMode != ModeTest {
if api.ethash.remote == nil {
return false
}
var errc = make(chan error, 1)
select {
case api.ethash.submitWorkCh <- &mineResult{
case api.ethash.remote.submitWorkCh <- &mineResult{
nonce: nonce,
mixDigest: digest,
hash: hash,
errc: errc,
}:
case <-api.ethash.exitCh:
case <-api.ethash.remote.exitCh:
return false
}
err := <-errc
return err == nil
}
@@ -94,21 +90,19 @@ func (api *API) SubmitWork(nonce types.BlockNonce, hash, digest common.Hash) boo
// It accepts the miner hash rate and an identifier which must be unique
// between nodes.
func (api *API) SubmitHashRate(rate hexutil.Uint64, id common.Hash) bool {
if api.ethash.config.PowMode != ModeNormal && api.ethash.config.PowMode != ModeTest {
if api.ethash.remote == nil {
return false
}
var done = make(chan struct{}, 1)
select {
case api.ethash.submitRateCh <- &hashrate{done: done, rate: uint64(rate), id: id}:
case <-api.ethash.exitCh:
case api.ethash.remote.submitRateCh <- &hashrate{done: done, rate: uint64(rate), id: id}:
case <-api.ethash.remote.exitCh:
return false
}
// Block until hash rate submitted successfully.
<-done
return true
}