consensus, core, miner, mobile: introduce sealHash interface

consensus/clique/clique.go

@@ -135,14 +135,14 @@ var (
 // backing account.
 type SignerFn func(accounts.Account, []byte) ([]byte, error)
 
-// SigHash returns the hash which is used as input for the proof-of-authority
+// sigHash returns the hash which is used as input for the proof-of-authority
 // signing. It is the hash of the entire header apart from the 65 byte signature
 // contained at the end of the extra data.
 //
 // Note, the method requires the extra data to be at least 65 bytes, otherwise it
 // panics. This is done to avoid accidentally using both forms (signature present
 // or not), which could be abused to produce different hashes for the same header.
-func SigHash(header *types.Header) (hash common.Hash) {
+func sigHash(header *types.Header) (hash common.Hash) {
 	hasher := sha3.NewKeccak256()
 
 	rlp.Encode(hasher, []interface{}{
@@ -180,7 +180,7 @@ func ecrecover(header *types.Header, sigcache *lru.ARCCache) (common.Address, er
 	signature := header.Extra[len(header.Extra)-extraSeal:]
 
 	// Recover the public key and the Ethereum address
-	pubkey, err := crypto.Ecrecover(SigHash(header).Bytes(), signature)
+	pubkey, err := crypto.Ecrecover(sigHash(header).Bytes(), signature)
 	if err != nil {
 		return common.Address{}, err
 	}
@@ -643,7 +643,7 @@ func (c *Clique) Seal(chain consensus.ChainReader, block *types.Block, stop <-ch
 	case <-time.After(delay):
 	}
 	// Sign all the things!
-	sighash, err := signFn(accounts.Account{Address: signer}, SigHash(header).Bytes())
+	sighash, err := signFn(accounts.Account{Address: signer}, sigHash(header).Bytes())
 	if err != nil {
 		return nil, err
 	}
@@ -673,6 +673,11 @@ func CalcDifficulty(snap *Snapshot, signer common.Address) *big.Int {
 	return new(big.Int).Set(diffNoTurn)
 }
 
+// SealHash returns the hash of a block prior to it being sealed.
+func (c *Clique) SealHash(header *types.Header) common.Hash {
+	return sigHash(header)
+}
+
 // Close implements consensus.Engine. It's a noop for clique as there is are no background threads.
 func (c *Clique) Close() error {
 	return nil

consensus/clique/snapshot_test.go

@@ -56,7 +56,7 @@ func (ap *testerAccountPool) sign(header *types.Header, signer string) {
 		ap.accounts[signer], _ = crypto.GenerateKey()
 	}
 	// Sign the header and embed the signature in extra data
-	sig, _ := crypto.Sign(SigHash(header).Bytes(), ap.accounts[signer])
+	sig, _ := crypto.Sign(sigHash(header).Bytes(), ap.accounts[signer])
 	copy(header.Extra[len(header.Extra)-65:], sig)
 }
 

consensus/consensus.go

@@ -90,6 +90,9 @@ type Engine interface {
 	// seal place on top.
 	Seal(chain ChainReader, block *types.Block, stop <-chan struct{}) (*types.Block, error)
 
+	// SealHash returns the hash of a block prior to it being sealed.
+	SealHash(header *types.Header) common.Hash
+
 	// CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty
 	// that a new block should have.
 	CalcDifficulty(chain ChainReader, time uint64, parent *types.Header) *big.Int

consensus/ethash/consensus.go

@@ -31,7 +31,9 @@ import (
 	"github.com/ethereum/go-ethereum/consensus/misc"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/crypto/sha3"
 	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/rlp"
 )
 
 // Ethash proof-of-work protocol constants.
@@ -495,7 +497,7 @@ func (ethash *Ethash) verifySeal(chain consensus.ChainReader, header *types.Head
 	if fulldag {
 		dataset := ethash.dataset(number, true)
 		if dataset.generated() {
-			digest, result = hashimotoFull(dataset.dataset, header.HashNoNonce().Bytes(), header.Nonce.Uint64())
+			digest, result = hashimotoFull(dataset.dataset, ethash.SealHash(header).Bytes(), header.Nonce.Uint64())
 
 			// Datasets are unmapped in a finalizer. Ensure that the dataset stays alive
 			// until after the call to hashimotoFull so it's not unmapped while being used.
@@ -513,7 +515,7 @@ func (ethash *Ethash) verifySeal(chain consensus.ChainReader, header *types.Head
 		if ethash.config.PowMode == ModeTest {
 			size = 32 * 1024
 		}
-		digest, result = hashimotoLight(size, cache.cache, header.HashNoNonce().Bytes(), header.Nonce.Uint64())
+		digest, result = hashimotoLight(size, cache.cache, ethash.SealHash(header).Bytes(), header.Nonce.Uint64())
 
 		// Caches are unmapped in a finalizer. Ensure that the cache stays alive
 		// until after the call to hashimotoLight so it's not unmapped while being used.
@@ -552,6 +554,29 @@ func (ethash *Ethash) Finalize(chain consensus.ChainReader, header *types.Header
 	return types.NewBlock(header, txs, uncles, receipts), nil
 }
 
+// SealHash returns the hash of a block prior to it being sealed.
+func (ethash *Ethash) SealHash(header *types.Header) (hash common.Hash) {
+	hasher := sha3.NewKeccak256()
+
+	rlp.Encode(hasher, []interface{}{
+		header.ParentHash,
+		header.UncleHash,
+		header.Coinbase,
+		header.Root,
+		header.TxHash,
+		header.ReceiptHash,
+		header.Bloom,
+		header.Difficulty,
+		header.Number,
+		header.GasLimit,
+		header.GasUsed,
+		header.Time,
+		header.Extra,
+	})
+	hasher.Sum(hash[:0])
+	return hash
+}
+
 // Some weird constants to avoid constant memory allocs for them.
 var (
 	big8  = big.NewInt(8)

consensus/ethash/ethash_test.go

@@ -94,6 +94,7 @@ func TestRemoteSealer(t *testing.T) {
 	}
 	header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
 	block := types.NewBlockWithHeader(header)
+	sealhash := ethash.SealHash(header)
 
 	// Push new work.
 	ethash.Seal(nil, block, nil)
@@ -102,27 +103,29 @@ func TestRemoteSealer(t *testing.T) {
 		work [3]string
 		err  error
 	)
-	if work, err = api.GetWork(); err != nil || work[0] != block.HashNoNonce().Hex() {
+	if work, err = api.GetWork(); err != nil || work[0] != sealhash.Hex() {
 		t.Error("expect to return a mining work has same hash")
 	}
 
-	if res := api.SubmitWork(types.BlockNonce{}, block.HashNoNonce(), common.Hash{}); res {
+	if res := api.SubmitWork(types.BlockNonce{}, sealhash, common.Hash{}); res {
 		t.Error("expect to return false when submit a fake solution")
 	}
 	// Push new block with same block number to replace the original one.
 	header = &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(1000)}
 	block = types.NewBlockWithHeader(header)
+	sealhash = ethash.SealHash(header)
 	ethash.Seal(nil, block, nil)
 
-	if work, err = api.GetWork(); err != nil || work[0] != block.HashNoNonce().Hex() {
+	if work, err = api.GetWork(); err != nil || work[0] != sealhash.Hex() {
 		t.Error("expect to return the latest pushed work")
 	}
 	// Push block with higher block number.
 	newHead := &types.Header{Number: big.NewInt(2), Difficulty: big.NewInt(100)}
 	newBlock := types.NewBlockWithHeader(newHead)
+	newSealhash := ethash.SealHash(newHead)
 	ethash.Seal(nil, newBlock, nil)
 
-	if res := api.SubmitWork(types.BlockNonce{}, block.HashNoNonce(), common.Hash{}); res {
+	if res := api.SubmitWork(types.BlockNonce{}, newSealhash, common.Hash{}); res {
 		t.Error("expect to return false when submit a stale solution")
 	}
 }

consensus/ethash/sealer.go

@@ -111,7 +111,7 @@ func (ethash *Ethash) mine(block *types.Block, id int, seed uint64, abort chan s
 	// Extract some data from the header
 	var (
 		header  = block.Header()
-		hash    = header.HashNoNonce().Bytes()
+		hash    = ethash.SealHash(header).Bytes()
 		target  = new(big.Int).Div(two256, header.Difficulty)
 		number  = header.Number.Uint64()
 		dataset = ethash.dataset(number, false)
@@ -213,7 +213,7 @@ func (ethash *Ethash) remote(notify []string) {
 	//   result[1], 32 bytes hex encoded seed hash used for DAG
 	//   result[2], 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
 	makeWork := func(block *types.Block) {
-		hash := block.HashNoNonce()
+		hash := ethash.SealHash(block.Header())
 
 		currentWork[0] = hash.Hex()
 		currentWork[1] = common.BytesToHash(SeedHash(block.NumberU64())).Hex()

consensus/ethash/sealer_test.go

@@ -51,7 +51,7 @@ func TestRemoteNotify(t *testing.T) {
 	ethash.Seal(nil, block, nil)
 	select {
 	case work := <-sink:
-		if want := header.HashNoNonce().Hex(); work[0] != want {
+		if want := ethash.SealHash(header).Hex(); work[0] != want {
 			t.Errorf("work packet hash mismatch: have %s, want %s", work[0], want)
 		}
 		if want := common.BytesToHash(SeedHash(header.Number.Uint64())).Hex(); work[1] != want {

core/types/block.go

@@ -102,25 +102,6 @@ func (h *Header) Hash() common.Hash {
 	return rlpHash(h)
 }
 
-// HashNoNonce returns the hash which is used as input for the proof-of-work search.
-func (h *Header) HashNoNonce() common.Hash {
-	return rlpHash([]interface{}{
-		h.ParentHash,
-		h.UncleHash,
-		h.Coinbase,
-		h.Root,
-		h.TxHash,
-		h.ReceiptHash,
-		h.Bloom,
-		h.Difficulty,
-		h.Number,
-		h.GasLimit,
-		h.GasUsed,
-		h.Time,
-		h.Extra,
-	})
-}
-
 // Size returns the approximate memory used by all internal contents. It is used
 // to approximate and limit the memory consumption of various caches.
 func (h *Header) Size() common.StorageSize {
@@ -324,10 +305,6 @@ func (b *Block) Header() *Header { return CopyHeader(b.header) }
 // Body returns the non-header content of the block.
 func (b *Block) Body() *Body { return &Body{b.transactions, b.uncles} }
 
-func (b *Block) HashNoNonce() common.Hash {
-	return b.header.HashNoNonce()
-}
-
 // Size returns the true RLP encoded storage size of the block, either by encoding
 // and returning it, or returning a previsouly cached value.
 func (b *Block) Size() common.StorageSize {

miner/worker.go

@@ -27,7 +27,6 @@ import (
 	mapset "github.com/deckarep/golang-set"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/consensus"
-	"github.com/ethereum/go-ethereum/consensus/clique"
 	"github.com/ethereum/go-ethereum/consensus/misc"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/state"
@@ -474,34 +473,27 @@ func (w *worker) seal(t *task, stop <-chan struct{}) {
 	if w.skipSealHook != nil && w.skipSealHook(t) {
 		return
 	}
-	// makeId creates an id for pending task based on consensus engine type.
-	makeId := func(block *types.Block) common.Hash {
-		hash := t.block.HashNoNonce()
-		if _, ok := w.engine.(*clique.Clique); ok {
-			hash = clique.SigHash(t.block.Header())
-		}
-		return hash
-	}
 	// The reason for caching task first is:
 	// A previous sealing action will be canceled by subsequent actions,
 	// however, remote miner may submit a result based on the cancelled task.
 	// So we should only submit the pending state corresponding to the seal result.
 	// TODO(rjl493456442) Replace the seal-wait logic structure
 	w.pendingMu.Lock()
-	w.pendingTasks[makeId(t.block)] = t
+	w.pendingTasks[w.engine.SealHash(t.block.Header())] = t
 	w.pendingMu.Unlock()
 
 	if block, err := w.engine.Seal(w.chain, t.block, stop); block != nil {
+		sealhash := w.engine.SealHash(block.Header())
 		w.pendingMu.RLock()
-		task, exist := w.pendingTasks[makeId(block)]
+		task, exist := w.pendingTasks[sealhash]
 		w.pendingMu.RUnlock()
 		if !exist {
-			log.Error("Block found but no relative pending task", "number", block.Number(), "hash", block.Hash())
+			log.Error("Block found but no relative pending task", "number", block.Number(), "sealhash", sealhash, "hash", block.Hash())
 			return
 		}
 		// Assemble sealing result
 		task.block = block
-		log.Info("Successfully sealed new block", "number", block.Number(), "hash", block.Hash(),
+		log.Info("Successfully sealed new block", "number", block.Number(), "sealhash", sealhash, "hash", block.Hash(),
 			"elapsed", common.PrettyDuration(time.Since(task.createdAt)))
 		select {
 		case w.resultCh <- task:
@@ -534,12 +526,13 @@ func (w *worker) taskLoop() {
 				w.newTaskHook(task)
 			}
 			// Reject duplicate sealing work due to resubmitting.
-			if task.block.HashNoNonce() == prev {
+			sealHash := w.engine.SealHash(task.block.Header())
+			if sealHash == prev {
 				continue
 			}
 			interrupt()
 			stopCh = make(chan struct{})
-			prev = task.block.HashNoNonce()
+			prev = sealHash
 			go w.seal(task, stopCh)
 		case <-w.exitCh:
 			interrupt()
@@ -961,8 +954,8 @@ func (w *worker) commit(uncles []*types.Header, interval func(), update bool, st
 			}
 			feesEth := new(big.Float).Quo(new(big.Float).SetInt(feesWei), new(big.Float).SetInt(big.NewInt(params.Ether)))
 
-			log.Info("Commit new mining work", "number", block.Number(), "uncles", len(uncles), "txs", w.current.tcount,
-				"gas", block.GasUsed(), "fees", feesEth, "elapsed", common.PrettyDuration(time.Since(start)))
+			log.Info("Commit new mining work", "number", block.Number(), "sealhash", w.engine.SealHash(block.Header()),
+				"uncles", len(uncles), "txs", w.current.tcount, "gas", block.GasUsed(), "fees", feesEth, "elapsed", common.PrettyDuration(time.Since(start)))
 
 		case <-w.exitCh:
 			log.Info("Worker has exited")

mobile/types.go

@@ -183,10 +183,7 @@ func (b *Block) GetTime() int64         { return b.block.Time().Int64() }
 func (b *Block) GetExtra() []byte               { return b.block.Extra() }
 func (b *Block) GetMixDigest() *Hash            { return &Hash{b.block.MixDigest()} }
 func (b *Block) GetNonce() int64                { return int64(b.block.Nonce()) }
-
 func (b *Block) GetHash() *Hash                 { return &Hash{b.block.Hash()} }
-func (b *Block) GetHashNoNonce() *Hash { return &Hash{b.block.HashNoNonce()} }
-
 func (b *Block) GetHeader() *Header             { return &Header{b.block.Header()} }
 func (b *Block) GetUncles() *Headers            { return &Headers{b.block.Uncles()} }
 func (b *Block) GetTransactions() *Transactions { return &Transactions{b.block.Transactions()} }