|
|
|
@ -35,6 +35,11 @@ import ( |
|
|
|
"github.com/ethereum/go-ethereum/log" |
|
|
|
"github.com/ethereum/go-ethereum/log" |
|
|
|
) |
|
|
|
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
const ( |
|
|
|
|
|
|
|
// staleThreshold is the maximum depth of the acceptable stale but valid ethash solution.
|
|
|
|
|
|
|
|
staleThreshold = 7 |
|
|
|
|
|
|
|
) |
|
|
|
|
|
|
|
|
|
|
|
var ( |
|
|
|
var ( |
|
|
|
errNoMiningWork = errors.New("no mining work available yet") |
|
|
|
errNoMiningWork = errors.New("no mining work available yet") |
|
|
|
errInvalidSealResult = errors.New("invalid or stale proof-of-work solution") |
|
|
|
errInvalidSealResult = errors.New("invalid or stale proof-of-work solution") |
|
|
|
@ -42,16 +47,21 @@ var ( |
|
|
|
|
|
|
|
|
|
|
|
// Seal implements consensus.Engine, attempting to find a nonce that satisfies
|
|
|
|
// Seal implements consensus.Engine, attempting to find a nonce that satisfies
|
|
|
|
// the block's difficulty requirements.
|
|
|
|
// the block's difficulty requirements.
|
|
|
|
func (ethash *Ethash) Seal(chain consensus.ChainReader, block *types.Block, stop <-chan struct{}) (*types.Block, error) { |
|
|
|
func (ethash *Ethash) Seal(chain consensus.ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error { |
|
|
|
// If we're running a fake PoW, simply return a 0 nonce immediately
|
|
|
|
// If we're running a fake PoW, simply return a 0 nonce immediately
|
|
|
|
if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake { |
|
|
|
if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake { |
|
|
|
header := block.Header() |
|
|
|
header := block.Header() |
|
|
|
header.Nonce, header.MixDigest = types.BlockNonce{}, common.Hash{} |
|
|
|
header.Nonce, header.MixDigest = types.BlockNonce{}, common.Hash{} |
|
|
|
return block.WithSeal(header), nil |
|
|
|
select { |
|
|
|
|
|
|
|
case results <- block.WithSeal(header): |
|
|
|
|
|
|
|
default: |
|
|
|
|
|
|
|
log.Warn("Sealing result is not read by miner", "mode", "fake", "sealhash", ethash.SealHash(block.Header())) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
return nil |
|
|
|
} |
|
|
|
} |
|
|
|
// If we're running a shared PoW, delegate sealing to it
|
|
|
|
// If we're running a shared PoW, delegate sealing to it
|
|
|
|
if ethash.shared != nil { |
|
|
|
if ethash.shared != nil { |
|
|
|
return ethash.shared.Seal(chain, block, stop) |
|
|
|
return ethash.shared.Seal(chain, block, results, stop) |
|
|
|
} |
|
|
|
} |
|
|
|
// Create a runner and the multiple search threads it directs
|
|
|
|
// Create a runner and the multiple search threads it directs
|
|
|
|
abort := make(chan struct{}) |
|
|
|
abort := make(chan struct{}) |
|
|
|
@ -62,7 +72,7 @@ func (ethash *Ethash) Seal(chain consensus.ChainReader, block *types.Block, stop |
|
|
|
seed, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64)) |
|
|
|
seed, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64)) |
|
|
|
if err != nil { |
|
|
|
if err != nil { |
|
|
|
ethash.lock.Unlock() |
|
|
|
ethash.lock.Unlock() |
|
|
|
return nil, err |
|
|
|
return err |
|
|
|
} |
|
|
|
} |
|
|
|
ethash.rand = rand.New(rand.NewSource(seed.Int64())) |
|
|
|
ethash.rand = rand.New(rand.NewSource(seed.Int64())) |
|
|
|
} |
|
|
|
} |
|
|
|
@ -75,34 +85,45 @@ func (ethash *Ethash) Seal(chain consensus.ChainReader, block *types.Block, stop |
|
|
|
} |
|
|
|
} |
|
|
|
// Push new work to remote sealer
|
|
|
|
// Push new work to remote sealer
|
|
|
|
if ethash.workCh != nil { |
|
|
|
if ethash.workCh != nil { |
|
|
|
ethash.workCh <- block |
|
|
|
ethash.workCh <- &sealTask{block: block, results: results} |
|
|
|
} |
|
|
|
} |
|
|
|
var pend sync.WaitGroup |
|
|
|
var ( |
|
|
|
|
|
|
|
pend sync.WaitGroup |
|
|
|
|
|
|
|
locals = make(chan *types.Block) |
|
|
|
|
|
|
|
) |
|
|
|
for i := 0; i < threads; i++ { |
|
|
|
for i := 0; i < threads; i++ { |
|
|
|
pend.Add(1) |
|
|
|
pend.Add(1) |
|
|
|
go func(id int, nonce uint64) { |
|
|
|
go func(id int, nonce uint64) { |
|
|
|
defer pend.Done() |
|
|
|
defer pend.Done() |
|
|
|
ethash.mine(block, id, nonce, abort, ethash.resultCh) |
|
|
|
ethash.mine(block, id, nonce, abort, locals) |
|
|
|
}(i, uint64(ethash.rand.Int63())) |
|
|
|
}(i, uint64(ethash.rand.Int63())) |
|
|
|
} |
|
|
|
} |
|
|
|
// Wait until sealing is terminated or a nonce is found
|
|
|
|
// Wait until sealing is terminated or a nonce is found
|
|
|
|
var result *types.Block |
|
|
|
go func() { |
|
|
|
select { |
|
|
|
var result *types.Block |
|
|
|
case <-stop: |
|
|
|
select { |
|
|
|
// Outside abort, stop all miner threads
|
|
|
|
case <-stop: |
|
|
|
close(abort) |
|
|
|
// Outside abort, stop all miner threads
|
|
|
|
case result = <-ethash.resultCh: |
|
|
|
close(abort) |
|
|
|
// One of the threads found a block, abort all others
|
|
|
|
case result = <-locals: |
|
|
|
close(abort) |
|
|
|
// One of the threads found a block, abort all others
|
|
|
|
case <-ethash.update: |
|
|
|
select { |
|
|
|
// Thread count was changed on user request, restart
|
|
|
|
case results <- result: |
|
|
|
close(abort) |
|
|
|
default: |
|
|
|
|
|
|
|
log.Warn("Sealing result is not read by miner", "mode", "local", "sealhash", ethash.SealHash(block.Header())) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
close(abort) |
|
|
|
|
|
|
|
case <-ethash.update: |
|
|
|
|
|
|
|
// Thread count was changed on user request, restart
|
|
|
|
|
|
|
|
close(abort) |
|
|
|
|
|
|
|
if err := ethash.Seal(chain, block, results, stop); err != nil { |
|
|
|
|
|
|
|
log.Error("Failed to restart sealing after update", "err", err) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
// Wait for all miners to terminate and return the block
|
|
|
|
pend.Wait() |
|
|
|
pend.Wait() |
|
|
|
return ethash.Seal(chain, block, stop) |
|
|
|
}() |
|
|
|
} |
|
|
|
return nil |
|
|
|
// Wait for all miners to terminate and return the block
|
|
|
|
|
|
|
|
pend.Wait() |
|
|
|
|
|
|
|
return result, nil |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
// mine is the actual proof-of-work miner that searches for a nonce starting from
|
|
|
|
// mine is the actual proof-of-work miner that searches for a nonce starting from
|
|
|
|
@ -165,11 +186,12 @@ search: |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
// remote is a standalone goroutine to handle remote mining related stuff.
|
|
|
|
// remote is a standalone goroutine to handle remote mining related stuff.
|
|
|
|
func (ethash *Ethash) remote(notify []string) { |
|
|
|
func (ethash *Ethash) remote(notify []string, noverify bool) { |
|
|
|
var ( |
|
|
|
var ( |
|
|
|
works = make(map[common.Hash]*types.Block) |
|
|
|
works = make(map[common.Hash]*types.Block) |
|
|
|
rates = make(map[common.Hash]hashrate) |
|
|
|
rates = make(map[common.Hash]hashrate) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
results chan<- *types.Block |
|
|
|
currentBlock *types.Block |
|
|
|
currentBlock *types.Block |
|
|
|
currentWork [3]string |
|
|
|
currentWork [3]string |
|
|
|
|
|
|
|
|
|
|
|
@ -226,11 +248,15 @@ func (ethash *Ethash) remote(notify []string) { |
|
|
|
// submitWork verifies the submitted pow solution, returning
|
|
|
|
// submitWork verifies the submitted pow solution, returning
|
|
|
|
// whether the solution was accepted or not (not can be both a bad pow as well as
|
|
|
|
// whether the solution was accepted or not (not can be both a bad pow as well as
|
|
|
|
// any other error, like no pending work or stale mining result).
|
|
|
|
// any other error, like no pending work or stale mining result).
|
|
|
|
submitWork := func(nonce types.BlockNonce, mixDigest common.Hash, hash common.Hash) bool { |
|
|
|
submitWork := func(nonce types.BlockNonce, mixDigest common.Hash, sealhash common.Hash) bool { |
|
|
|
|
|
|
|
if currentBlock == nil { |
|
|
|
|
|
|
|
log.Error("Pending work without block", "sealhash", sealhash) |
|
|
|
|
|
|
|
return false |
|
|
|
|
|
|
|
} |
|
|
|
// Make sure the work submitted is present
|
|
|
|
// Make sure the work submitted is present
|
|
|
|
block := works[hash] |
|
|
|
block := works[sealhash] |
|
|
|
if block == nil { |
|
|
|
if block == nil { |
|
|
|
log.Info("Work submitted but none pending", "hash", hash) |
|
|
|
log.Warn("Work submitted but none pending", "sealhash", sealhash, "curnumber", currentBlock.NumberU64()) |
|
|
|
return false |
|
|
|
return false |
|
|
|
} |
|
|
|
} |
|
|
|
// Verify the correctness of submitted result.
|
|
|
|
// Verify the correctness of submitted result.
|
|
|
|
@ -239,26 +265,36 @@ func (ethash *Ethash) remote(notify []string) { |
|
|
|
header.MixDigest = mixDigest |
|
|
|
header.MixDigest = mixDigest |
|
|
|
|
|
|
|
|
|
|
|
start := time.Now() |
|
|
|
start := time.Now() |
|
|
|
if err := ethash.verifySeal(nil, header, true); err != nil { |
|
|
|
if !noverify { |
|
|
|
log.Warn("Invalid proof-of-work submitted", "hash", hash, "elapsed", time.Since(start), "err", err) |
|
|
|
if err := ethash.verifySeal(nil, header, true); err != nil { |
|
|
|
return false |
|
|
|
log.Warn("Invalid proof-of-work submitted", "sealhash", sealhash, "elapsed", time.Since(start), "err", err) |
|
|
|
|
|
|
|
return false |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
// Make sure the result channel is created.
|
|
|
|
// Make sure the result channel is assigned.
|
|
|
|
if ethash.resultCh == nil { |
|
|
|
if results == nil { |
|
|
|
log.Warn("Ethash result channel is empty, submitted mining result is rejected") |
|
|
|
log.Warn("Ethash result channel is empty, submitted mining result is rejected") |
|
|
|
return false |
|
|
|
return false |
|
|
|
} |
|
|
|
} |
|
|
|
log.Trace("Verified correct proof-of-work", "hash", hash, "elapsed", time.Since(start)) |
|
|
|
log.Trace("Verified correct proof-of-work", "sealhash", sealhash, "elapsed", time.Since(start)) |
|
|
|
|
|
|
|
|
|
|
|
// Solutions seems to be valid, return to the miner and notify acceptance.
|
|
|
|
// Solutions seems to be valid, return to the miner and notify acceptance.
|
|
|
|
select { |
|
|
|
solution := block.WithSeal(header) |
|
|
|
case ethash.resultCh <- block.WithSeal(header): |
|
|
|
|
|
|
|
delete(works, hash) |
|
|
|
// The submitted solution is within the scope of acceptance.
|
|
|
|
return true |
|
|
|
if solution.NumberU64()+staleThreshold > currentBlock.NumberU64() { |
|
|
|
default: |
|
|
|
select { |
|
|
|
log.Info("Work submitted is stale", "hash", hash) |
|
|
|
case results <- solution: |
|
|
|
return false |
|
|
|
log.Debug("Work submitted is acceptable", "number", solution.NumberU64(), "sealhash", sealhash, "hash", solution.Hash()) |
|
|
|
|
|
|
|
return true |
|
|
|
|
|
|
|
default: |
|
|
|
|
|
|
|
log.Warn("Sealing result is not read by miner", "mode", "remote", "sealhash", sealhash) |
|
|
|
|
|
|
|
return false |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
// The submitted block is too old to accept, drop it.
|
|
|
|
|
|
|
|
log.Warn("Work submitted is too old", "number", solution.NumberU64(), "sealhash", sealhash, "hash", solution.Hash()) |
|
|
|
|
|
|
|
return false |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
ticker := time.NewTicker(5 * time.Second) |
|
|
|
ticker := time.NewTicker(5 * time.Second) |
|
|
|
@ -266,14 +302,12 @@ func (ethash *Ethash) remote(notify []string) { |
|
|
|
|
|
|
|
|
|
|
|
for { |
|
|
|
for { |
|
|
|
select { |
|
|
|
select { |
|
|
|
case block := <-ethash.workCh: |
|
|
|
case work := <-ethash.workCh: |
|
|
|
if currentBlock != nil && block.ParentHash() != currentBlock.ParentHash() { |
|
|
|
|
|
|
|
// Start new round mining, throw out all previous work.
|
|
|
|
|
|
|
|
works = make(map[common.Hash]*types.Block) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
// Update current work with new received block.
|
|
|
|
// Update current work with new received block.
|
|
|
|
// Note same work can be past twice, happens when changing CPU threads.
|
|
|
|
// Note same work can be past twice, happens when changing CPU threads.
|
|
|
|
makeWork(block) |
|
|
|
results = work.results |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
makeWork(work.block) |
|
|
|
|
|
|
|
|
|
|
|
// Notify and requested URLs of the new work availability
|
|
|
|
// Notify and requested URLs of the new work availability
|
|
|
|
notifyWork() |
|
|
|
notifyWork() |
|
|
|
@ -315,6 +349,14 @@ func (ethash *Ethash) remote(notify []string) { |
|
|
|
delete(rates, id) |
|
|
|
delete(rates, id) |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
// Clear stale pending blocks
|
|
|
|
|
|
|
|
if currentBlock != nil { |
|
|
|
|
|
|
|
for hash, block := range works { |
|
|
|
|
|
|
|
if block.NumberU64()+staleThreshold <= currentBlock.NumberU64() { |
|
|
|
|
|
|
|
delete(works, hash) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
case errc := <-ethash.exitCh: |
|
|
|
case errc := <-ethash.exitCh: |
|
|
|
// Exit remote loop if ethash is closed and return relevant error.
|
|
|
|
// Exit remote loop if ethash is closed and return relevant error.
|
|
|
|
|
gary rong
6 years ago
committed by
Péter Szilágyi