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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| lru "github.com/hashicorp/golang-lru" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/core/rawdb" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/log" | ||
| ) | ||
|
|
||
| const verifiedCacheSize = 256 | ||
|
|
||
| type VerifyManager struct { | ||
| bc *BlockChain | ||
| tasks map[common.Hash]*VerifyTask | ||
| peers VerifyPeers | ||
| verifiedCache *lru.Cache | ||
| allowUntrustedVerify bool | ||
| verifyCh chan common.Hash | ||
| exitCh chan struct{} | ||
| } | ||
|
|
||
| func NewVerifyManager(blockchain *BlockChain) *VerifyManager { | ||
| verifiedCache, _ := lru.New(verifiedCacheSize) | ||
| vm := &VerifyManager{ | ||
| bc: blockchain, | ||
| tasks: make(map[common.Hash]*VerifyTask), | ||
| verifiedCache: verifiedCache, | ||
| verifyCh: make(chan common.Hash), | ||
| exitCh: make(chan struct{}), | ||
| } | ||
| return vm | ||
| } | ||
|
|
||
| func (vm *VerifyManager) Start() { | ||
| //read disk store to initial verified cache | ||
| //load unverified blocks in a normalized chain and start a batch of verify task | ||
| header := vm.bc.CurrentHeader() | ||
| vm.NewBlockVerifyTask(header) | ||
| go vm.mainLoop() | ||
| } | ||
|
|
||
| func (vm *VerifyManager) Stop() { | ||
| defer close(vm.exitCh) | ||
| vm.exitCh <- struct{}{} | ||
| } | ||
|
|
||
| func (vm *VerifyManager) mainLoop() { | ||
| pruneTicker := time.NewTicker(time.Second) | ||
| for { | ||
| select { | ||
| case hash := <-vm.verifyCh: | ||
| vm.cacheBlockVerified(hash) | ||
| rawdb.WriteTrustBlockHash(vm.bc.db, hash) | ||
| delete(vm.tasks, hash) | ||
| case <-pruneTicker.C: | ||
| for hash, task := range vm.tasks { | ||
| if vm.bc.CurrentHeader().Number.Uint64()-task.blockHeader.Number.Uint64() > 15 { | ||
| task.terminalCh <- struct{}{} | ||
| delete(vm.tasks, hash) | ||
| } | ||
| } | ||
| case <-vm.exitCh: | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (vm *VerifyManager) NewBlockVerifyTask(header *types.Header) { | ||
| for i := 0; i < 11; i++ { | ||
| hash := header.Hash() | ||
| diffLayer := vm.bc.GetTrustedDiffLayer(hash) | ||
| //if this block has no diff, there is no need to verify it. | ||
| if diffLayer == nil { | ||
| continue | ||
| } | ||
| //if verified cache record that this block has been verified, skip. | ||
| if _, ok := vm.verifiedCache.Get(hash); ok { | ||
| continue | ||
| } | ||
| //if verified storage record that this block has been verified, skip. | ||
| if rawdb.ReadTrustBlockHash(vm.bc.db, hash) { | ||
| vm.cacheBlockVerified(hash) | ||
| continue | ||
| } | ||
| //if there already has a verify task for this block, skip. | ||
| if _, ok := vm.tasks[hash]; ok { | ||
| continue | ||
| } | ||
| diffHash, err := GetTrustedDiffHash(diffLayer) | ||
| if err != nil { | ||
| log.Error("failed to get diff hash", "block", hash, "number", header.Number, "error:", err) | ||
| } | ||
| verifyTask := NewVerifyTask(diffHash, header, vm.peers, vm.bc.db, vm.verifyCh, vm.allowUntrustedVerify) | ||
| vm.tasks[hash] = verifyTask | ||
| header = vm.bc.GetHeaderByHash(header.ParentHash) | ||
| } | ||
| } | ||
|
|
||
| func (vm *VerifyManager) cacheBlockVerified(hash common.Hash) { | ||
| if vm.verifiedCache.Len() >= verifiedCacheSize { | ||
| vm.verifiedCache.RemoveOldest() | ||
| } | ||
| vm.verifiedCache.Add(hash, true) | ||
| } | ||
|
|
||
| //CheckAncestorVerified function check whether head 11 of this block has been verified. | ||
| //If not, the blockchain should stop to insert new block. | ||
| func (vm *VerifyManager) CheckAncestorVerified(header *types.Header) bool { | ||
| pHeader := header | ||
| for i := 0; i < 11; i++ { | ||
| pHeader = vm.bc.GetHeaderByHash(pHeader.ParentHash) | ||
| } | ||
| hash := pHeader.Hash() | ||
| if _, ok := vm.verifiedCache.Get(hash); ok { | ||
| return true | ||
| } else { | ||
| return rawdb.ReadTrustBlockHash(vm.bc.db, hash) | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func (vm *VerifyManager) HandleRootResponse(vr *types.VerifyResult, pid string) error { | ||
| if vt, ok := vm.tasks[vr.BlockHash]; ok { | ||
| vt.messageCh <- VerifyMessage{verifyResult: vr, peerId: pid} | ||
| return nil | ||
| } | ||
| return fmt.Errorf("") | ||
| } |
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