diff options
| -rw-r--r-- | LICENSE | 619 | ||||
| -rw-r--r-- | plugin/evm/block.go | 75 | ||||
| -rw-r--r-- | plugin/evm/database.go | 66 | ||||
| -rw-r--r-- | plugin/evm/factory.go | 19 | ||||
| -rw-r--r-- | plugin/evm/service.go | 122 | ||||
| -rw-r--r-- | plugin/evm/static_service.go | 22 | ||||
| -rw-r--r-- | plugin/evm/static_service_test.go | 64 | ||||
| -rw-r--r-- | plugin/evm/vm.go | 502 | ||||
| -rw-r--r-- | plugin/evm/vm_genesis_parse_test.go | 32 | ||||
| -rw-r--r-- | plugin/main.go | 21 |
10 files changed, 1542 insertions, 0 deletions
@@ -0,0 +1,619 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2020 Ava Labs. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. 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Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. diff --git a/plugin/evm/block.go b/plugin/evm/block.go new file mode 100644 index 0000000..ec47490 --- /dev/null +++ b/plugin/evm/block.go @@ -0,0 +1,75 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "fmt" + + "github.com/ava-labs/go-ethereum/core/types" + "github.com/ava-labs/go-ethereum/rlp" + + "github.com/ava-labs/gecko/ids" + "github.com/ava-labs/gecko/snow/choices" + "github.com/ava-labs/gecko/snow/consensus/snowman" +) + +// Block implements the snowman.Block interface +type Block struct { + id ids.ID + ethBlock *types.Block + vm *VM +} + +// ID implements the snowman.Block interface +func (b *Block) ID() ids.ID { return b.id } + +// Accept implements the snowman.Block interface +func (b *Block) Accept() { + b.vm.ctx.Log.Verbo("Block %s is accepted", b.ID()) + b.vm.updateStatus(b.ID(), choices.Accepted) +} + +// Reject implements the snowman.Block interface +func (b *Block) Reject() { + b.vm.ctx.Log.Verbo("Block %s is rejected", b.ID()) + b.vm.updateStatus(b.ID(), choices.Rejected) +} + +// Status implements the snowman.Block interface +func (b *Block) Status() choices.Status { + status := b.vm.getCachedStatus(b.ID()) + if status == choices.Unknown && b.ethBlock != nil { + return choices.Processing + } + return status +} + +// Parent implements the snowman.Block interface +func (b *Block) Parent() snowman.Block { + parentID := ids.NewID(b.ethBlock.ParentHash()) + block := &Block{ + id: parentID, + ethBlock: b.vm.getCachedBlock(parentID), + vm: b.vm, + } + b.vm.ctx.Log.Verbo("Parent(%s) has status: %s", block.ID(), block.Status()) + return block +} + +// Verify implements the snowman.Block interface +func (b *Block) Verify() error { + _, err := b.vm.chain.InsertChain([]*types.Block{b.ethBlock}) + return err +} + +// Bytes implements the snowman.Block interface +func (b *Block) Bytes() []byte { + res, err := rlp.EncodeToBytes(b.ethBlock) + if err != nil { + panic(err) + } + return res +} + +func (b *Block) String() string { return fmt.Sprintf("EVM block, ID = %s", b.ID()) } diff --git a/plugin/evm/database.go b/plugin/evm/database.go new file mode 100644 index 0000000..de592e1 --- /dev/null +++ b/plugin/evm/database.go @@ -0,0 +1,66 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "errors" + + "github.com/ava-labs/go-ethereum/ethdb" + + "github.com/ava-labs/gecko/database" +) + +var ( + errOpNotSupported = errors.New("this operation is not supported") +) + +// Database implements ethdb.Database +type Database struct{ database.Database } + +// HasAncient returns an error as we don't have a backing chain freezer. +func (db Database) HasAncient(kind string, number uint64) (bool, error) { + return false, errOpNotSupported +} + +// Ancient returns an error as we don't have a backing chain freezer. +func (db Database) Ancient(kind string, number uint64) ([]byte, error) { return nil, errOpNotSupported } + +// Ancients returns an error as we don't have a backing chain freezer. +func (db Database) Ancients() (uint64, error) { return 0, errOpNotSupported } + +// AncientSize returns an error as we don't have a backing chain freezer. +func (db Database) AncientSize(kind string) (uint64, error) { return 0, errOpNotSupported } + +// AppendAncient returns an error as we don't have a backing chain freezer. +func (db Database) AppendAncient(number uint64, hash, header, body, receipts, td []byte) error { + return errOpNotSupported +} + +// TruncateAncients returns an error as we don't have a backing chain freezer. +func (db Database) TruncateAncients(items uint64) error { return errOpNotSupported } + +// Sync returns an error as we don't have a backing chain freezer. +func (db Database) Sync() error { return errOpNotSupported } + +// NewBatch implements ethdb.Database +func (db Database) NewBatch() ethdb.Batch { return Batch{db.Database.NewBatch()} } + +// NewIterator implements ethdb.Database +func (db Database) NewIterator() ethdb.Iterator { return db.Database.NewIterator() } + +// NewIteratorWithPrefix implements ethdb.Database +func (db Database) NewIteratorWithPrefix(prefix []byte) ethdb.Iterator { + return db.NewIteratorWithPrefix(prefix) +} + +// NewIteratorWithStart implements ethdb.Database +func (db Database) NewIteratorWithStart(start []byte) ethdb.Iterator { + return db.NewIteratorWithStart(start) +} + +// Batch implements ethdb.Batch +type Batch struct{ database.Batch } + +// Replay implements ethdb.Batch +func (batch Batch) Replay(w ethdb.KeyValueWriter) error { return batch.Batch.Replay(w) } diff --git a/plugin/evm/factory.go b/plugin/evm/factory.go new file mode 100644 index 0000000..a4c0eca --- /dev/null +++ b/plugin/evm/factory.go @@ -0,0 +1,19 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "github.com/ava-labs/gecko/ids" +) + +// ID this VM should be referenced by +var ( + ID = ids.NewID([32]byte{'e', 'v', 'm'}) +) + +// Factory ... +type Factory struct{} + +// New ... +func (f *Factory) New() interface{} { return &VM{} } diff --git a/plugin/evm/service.go b/plugin/evm/service.go new file mode 100644 index 0000000..70135cc --- /dev/null +++ b/plugin/evm/service.go @@ -0,0 +1,122 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "context" + "crypto/rand" + "fmt" + "math/big" + + "github.com/ava-labs/coreth" + + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/common/hexutil" + "github.com/ava-labs/go-ethereum/core/types" + "github.com/ava-labs/go-ethereum/crypto" +) + +const ( + version = "Athereum 1.0" +) + +// test constants +const ( + GenesisTestAddr = "0x751a0b96e1042bee789452ecb20253fba40dbe85" + GenesisTestKey = "0xabd71b35d559563fea757f0f5edbde286fb8c043105b15abb7cd57189306d7d1" +) + +// DebugAPI introduces helper functions for debuging +type DebugAPI struct{ vm *VM } + +// SnowmanAPI introduces snowman specific functionality to the evm +type SnowmanAPI struct{ vm *VM } + +// NetAPI offers network related API methods +type NetAPI struct{ vm *VM } + +// NewNetAPI creates a new net API instance. +func NewNetAPI(vm *VM) *NetAPI { return &NetAPI{vm} } + +// Listening returns an indication if the node is listening for network connections. +func (s *NetAPI) Listening() bool { return true } // always listening + +// PeerCount returns the number of connected peers +func (s *NetAPI) PeerCount() hexutil.Uint { return hexutil.Uint(0) } // TODO: report number of connected peers + +// Version returns the current ethereum protocol version. +func (s *NetAPI) Version() string { return fmt.Sprintf("%d", s.vm.networkID) } + +// Web3API offers helper API methods +type Web3API struct{} + +// ClientVersion returns the version of the vm running +func (s *Web3API) ClientVersion() string { return version } + +// Sha3 returns the bytes returned by hashing [input] with Keccak256 +func (s *Web3API) Sha3(input hexutil.Bytes) hexutil.Bytes { return crypto.Keccak256(input) } + +// GetAcceptedFrontReply defines the reply that will be sent from the +// GetAcceptedFront API call +type GetAcceptedFrontReply struct { + Hash common.Hash `json:"hash"` + Number *big.Int `json:"number"` +} + +// GetAcceptedFront returns the last accepted block's hash and height +func (api *SnowmanAPI) GetAcceptedFront(ctx context.Context) (*GetAcceptedFrontReply, error) { + blk := api.vm.getLastAccepted().ethBlock + return &GetAcceptedFrontReply{ + Hash: blk.Hash(), + Number: blk.Number(), + }, nil +} + +// GetGenesisBalance returns the current funds in the genesis +func (api *DebugAPI) GetGenesisBalance(ctx context.Context) (*hexutil.Big, error) { + lastAccepted := api.vm.getLastAccepted() + api.vm.ctx.Log.Verbo("Currently accepted block front: %s", lastAccepted.ethBlock.Hash().Hex()) + state, err := api.vm.chain.BlockState(lastAccepted.ethBlock) + if err != nil { + return nil, err + } + return (*hexutil.Big)(state.GetBalance(common.HexToAddress(GenesisTestAddr))), nil +} + +// SpendGenesis funds +func (api *DebugAPI) SpendGenesis(ctx context.Context, nonce uint64) error { + api.vm.ctx.Log.Info("Spending the genesis") + + value := big.NewInt(1000000000000) + gasLimit := 21000 + gasPrice := big.NewInt(1000000000) + + genPrivateKey, err := crypto.HexToECDSA(GenesisTestKey[2:]) + if err != nil { + return err + } + bob, err := coreth.NewKey(rand.Reader) + if err != nil { + return err + } + + tx := types.NewTransaction(nonce, bob.Address, value, uint64(gasLimit), gasPrice, nil) + signedTx, err := types.SignTx(tx, types.NewEIP155Signer(api.vm.chainID), genPrivateKey) + if err != nil { + return err + } + + if err := api.vm.issueRemoteTxs([]*types.Transaction{signedTx}); err != nil { + return err + } + + return nil +} + +// IssueBlock to the chain +func (api *DebugAPI) IssueBlock(ctx context.Context) error { + api.vm.ctx.Log.Info("Issuing a new block") + + return api.vm.tryBlockGen() +} diff --git a/plugin/evm/static_service.go b/plugin/evm/static_service.go new file mode 100644 index 0000000..d3870ca --- /dev/null +++ b/plugin/evm/static_service.go @@ -0,0 +1,22 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "context" + "encoding/json" + + "github.com/ava-labs/coreth/core" + "github.com/ava-labs/gecko/utils/formatting" +) + +// StaticService defines the static API services exposed by the evm +type StaticService struct{} + +// BuildGenesis returns the UTXOs such that at least one address in [args.Addresses] is +// referenced in the UTXO. +func (*StaticService) BuildGenesis(_ context.Context, args *core.Genesis) (formatting.CB58, error) { + bytes, err := json.Marshal(args) + return formatting.CB58{Bytes: bytes}, err +} diff --git a/plugin/evm/static_service_test.go b/plugin/evm/static_service_test.go new file mode 100644 index 0000000..c492798 --- /dev/null +++ b/plugin/evm/static_service_test.go @@ -0,0 +1,64 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "math/big" + "testing" + + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/params" + + "github.com/ava-labs/coreth/core" +) + +func TestBuildGenesis(t *testing.T) { + expected := "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" + + balance, success := new(big.Int).SetString("33b2e3c9fd0804000000000", 16) + if !success { + t.Fatal("Failed to initialize balance") + } + + args := core.Genesis{ + Config: ¶ms.ChainConfig{ + ChainID: big.NewInt(43110), + HomesteadBlock: big.NewInt(0), + DAOForkBlock: big.NewInt(0), + DAOForkSupport: true, + EIP150Block: big.NewInt(0), + EIP150Hash: common.HexToHash("0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0"), + EIP155Block: big.NewInt(0), + EIP158Block: big.NewInt(0), + ByzantiumBlock: big.NewInt(0), + ConstantinopleBlock: big.NewInt(0), + PetersburgBlock: big.NewInt(0), + }, + Nonce: 0, + Timestamp: 0, + ExtraData: []byte{}, + GasLimit: 100000000, + Difficulty: big.NewInt(0), + Mixhash: common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"), + Coinbase: common.HexToAddress("0x0000000000000000000000000000000000000000"), + Alloc: core.GenesisAlloc{ + common.HexToAddress("751a0b96e1042bee789452ecb20253fba40dbe85"): core.GenesisAccount{ + Balance: balance, + }, + }, + Number: 0, + GasUsed: 0, + ParentHash: common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"), + } + + ss := StaticService{} + result, err := ss.BuildGenesis(nil, &args) + if err != nil { + t.Fatal(err) + } + + if result.String() != expected { + t.Fatalf("StaticService.BuildGenesis:\nReturned: %s\nExpected: %s", result, expected) + } +} diff --git a/plugin/evm/vm.go b/plugin/evm/vm.go new file mode 100644 index 0000000..a9011ea --- /dev/null +++ b/plugin/evm/vm.go @@ -0,0 +1,502 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "crypto/rand" + "encoding/json" + "errors" + "fmt" + "math/big" + "sync" + "sync/atomic" + "time" + + "github.com/ava-labs/coreth" + "github.com/ava-labs/coreth/core" + "github.com/ava-labs/coreth/eth" + "github.com/ava-labs/coreth/node" + + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/core/types" + "github.com/ava-labs/go-ethereum/rlp" + "github.com/ava-labs/go-ethereum/rpc" + + "github.com/ava-labs/gecko/cache" + "github.com/ava-labs/gecko/database" + "github.com/ava-labs/gecko/ids" + "github.com/ava-labs/gecko/snow" + "github.com/ava-labs/gecko/snow/choices" + "github.com/ava-labs/gecko/snow/consensus/snowman" + "github.com/ava-labs/gecko/utils/timer" + + commonEng "github.com/ava-labs/gecko/snow/engine/common" +) + +const ( + lastAcceptedKey = "snowman_lastAccepted" +) + +const ( + minBlockTime = 250 * time.Millisecond + maxBlockTime = 1000 * time.Millisecond + batchSize = 250 +) + +const ( + bdTimerStateMin = iota + bdTimerStateMax + bdTimerStateLong +) + +var ( + errEmptyBlock = errors.New("empty block") + errCreateBlock = errors.New("couldn't create block") + errUnknownBlock = errors.New("unknown block") + errBlockFrequency = errors.New("too frequent block issuance") + errUnsupportedFXs = errors.New("unsupported feature extensions") +) + +func maxDuration(x, y time.Duration) time.Duration { + if x > y { + return x + } + return y +} + +// VM implements the snowman.ChainVM interface +type VM struct { + ctx *snow.Context + + chainID *big.Int + networkID uint64 + chain *coreth.ETHChain + chaindb Database + newBlockChan chan *Block + networkChan chan<- commonEng.Message + newTxPoolHeadChan chan core.NewTxPoolHeadEvent + + txPoolStabilizedHead common.Hash + txPoolStabilizedOk chan struct{} + txPoolStabilizedLock sync.Mutex + + metalock sync.Mutex + blockCache, blockStatusCache cache.LRU + lastAccepted *Block + writingMetadata uint32 + + bdlock sync.Mutex + blockDelayTimer *timer.Timer + bdTimerState int8 + bdGenWaitFlag bool + bdGenFlag bool + + genlock sync.Mutex + txSubmitChan <-chan struct{} +} + +/* + ****************************************************************************** + ********************************* Snowman API ******************************** + ****************************************************************************** + */ + +// Initialize implements the snowman.ChainVM interface +func (vm *VM) Initialize( + ctx *snow.Context, + db database.Database, + b []byte, + toEngine chan<- commonEng.Message, + fxs []*commonEng.Fx, +) error { + if len(fxs) > 0 { + return errUnsupportedFXs + } + + vm.ctx = ctx + vm.chaindb = Database{db} + g := new(core.Genesis) + err := json.Unmarshal(b, g) + if err != nil { + return err + } + + vm.chainID = g.Config.ChainID + + config := eth.DefaultConfig + config.ManualCanonical = true + config.Genesis = g + config.Miner.ManualMining = true + config.Miner.DisableUncle = true + if err := config.SetGCMode("archive"); err != nil { + panic(err) + } + nodecfg := node.Config{NoUSB: true} + chain := coreth.NewETHChain(&config, &nodecfg, nil, vm.chaindb) + vm.chain = chain + vm.networkID = config.NetworkId + chain.SetOnHeaderNew(func(header *types.Header) { + hid := make([]byte, 32) + _, err := rand.Read(hid) + if err != nil { + panic("cannot generate hid") + } + header.Extra = append(header.Extra, hid...) + }) + chain.SetOnSeal(func(block *types.Block) error { + if len(block.Transactions()) == 0 { + // this could happen due to the async logic of geth tx pool + vm.newBlockChan <- nil + return errEmptyBlock + } + return nil + }) + chain.SetOnSealFinish(func(block *types.Block) error { + vm.ctx.Log.Verbo("EVM sealed a block") + + blk := &Block{ + id: ids.NewID(block.Hash()), + ethBlock: block, + vm: vm, + } + vm.newBlockChan <- blk + vm.updateStatus(ids.NewID(block.Hash()), choices.Processing) + vm.txPoolStabilizedLock.Lock() + vm.txPoolStabilizedHead = block.Hash() + vm.txPoolStabilizedLock.Unlock() + return nil + }) + chain.SetOnQueryAcceptedBlock(func() *types.Block { + return vm.getLastAccepted().ethBlock + }) + vm.blockCache = cache.LRU{Size: 2048} + vm.blockStatusCache = cache.LRU{Size: 1024} + vm.newBlockChan = make(chan *Block) + vm.networkChan = toEngine + vm.blockDelayTimer = timer.NewTimer(func() { + vm.bdlock.Lock() + switch vm.bdTimerState { + case bdTimerStateMin: + vm.bdTimerState = bdTimerStateMax + vm.blockDelayTimer.SetTimeoutIn(maxDuration(maxBlockTime-minBlockTime, 0)) + case bdTimerStateMax: + vm.bdTimerState = bdTimerStateLong + } + tryAgain := vm.bdGenWaitFlag + vm.bdlock.Unlock() + if tryAgain { + vm.tryBlockGen() + } + }) + go ctx.Log.RecoverAndPanic(vm.blockDelayTimer.Dispatch) + + vm.bdTimerState = bdTimerStateLong + vm.bdGenWaitFlag = true + vm.newTxPoolHeadChan = make(chan core.NewTxPoolHeadEvent, 1) + vm.txPoolStabilizedOk = make(chan struct{}, 1) + chain.GetTxPool().SubscribeNewHeadEvent(vm.newTxPoolHeadChan) + // TODO: shutdown this go routine + go ctx.Log.RecoverAndPanic(func() { + for { + select { + case h := <-vm.newTxPoolHeadChan: + vm.txPoolStabilizedLock.Lock() + if vm.txPoolStabilizedHead == h.Block.Hash() { + vm.txPoolStabilizedOk <- struct{}{} + vm.txPoolStabilizedHead = common.Hash{} + } + vm.txPoolStabilizedLock.Unlock() + } + } + }) + chain.Start() + + var lastAccepted *types.Block + if b, err := vm.chaindb.Get([]byte(lastAcceptedKey)); err == nil { + var hash common.Hash + if err = rlp.DecodeBytes(b, &hash); err == nil { + if block := chain.GetBlockByHash(hash); block == nil { + vm.ctx.Log.Debug("lastAccepted block not found in chaindb") + } else { + lastAccepted = block + } + } + } + if lastAccepted == nil { + vm.ctx.Log.Debug("lastAccepted is unavailable, setting to the genesis block") + lastAccepted = chain.GetGenesisBlock() + } + vm.lastAccepted = &Block{ + id: ids.NewID(lastAccepted.Hash()), + ethBlock: lastAccepted, + vm: vm, + } + vm.ctx.Log.Info(fmt.Sprintf("lastAccepted = %s", vm.lastAccepted.ethBlock.Hash().Hex())) + + // TODO: shutdown this go routine + go vm.ctx.Log.RecoverAndPanic(func() { + vm.txSubmitChan = vm.chain.GetTxSubmitCh() + for { + select { + case <-vm.txSubmitChan: + vm.ctx.Log.Verbo("New tx detected, trying to generate a block") + vm.tryBlockGen() + case <-time.After(5 * time.Second): + vm.tryBlockGen() + } + } + }) + + return nil +} + +// Shutdown implements the snowman.ChainVM interface +func (vm *VM) Shutdown() { + if vm.ctx == nil { + return + } + + vm.writeBackMetadata() + vm.chain.Stop() +} + +// BuildBlock implements the snowman.ChainVM interface +func (vm *VM) BuildBlock() (snowman.Block, error) { + vm.chain.GenBlock() + block := <-vm.newBlockChan + if block == nil { + return nil, errCreateBlock + } + // reset the min block time timer + vm.bdlock.Lock() + vm.bdTimerState = bdTimerStateMin + vm.bdGenWaitFlag = false + vm.bdGenFlag = false + vm.blockDelayTimer.SetTimeoutIn(minBlockTime) + vm.bdlock.Unlock() + + vm.ctx.Log.Debug("built block 0x%x", block.ID().Bytes()) + // make sure Tx Pool is updated + <-vm.txPoolStabilizedOk + return block, nil +} + +// ParseBlock implements the snowman.ChainVM interface +func (vm *VM) ParseBlock(b []byte) (snowman.Block, error) { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + ethBlock := new(types.Block) + if err := rlp.DecodeBytes(b, ethBlock); err != nil { + return nil, err + } + block := &Block{ + id: ids.NewID(ethBlock.Hash()), + ethBlock: ethBlock, + vm: vm, + } + vm.blockCache.Put(block.ID(), block) + return block, nil +} + +// GetBlock implements the snowman.ChainVM interface +func (vm *VM) GetBlock(id ids.ID) (snowman.Block, error) { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + block := vm.getBlock(id) + if block == nil { + return nil, errUnknownBlock + } + return block, nil +} + +// SetPreference sets what the current tail of the chain is +func (vm *VM) SetPreference(blkID ids.ID) { + err := vm.chain.SetTail(blkID.Key()) + vm.ctx.Log.AssertNoError(err) +} + +// LastAccepted returns the ID of the block that was last accepted +func (vm *VM) LastAccepted() ids.ID { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + return vm.lastAccepted.ID() +} + +// CreateHandlers makes new http handlers that can handle API calls +func (vm *VM) CreateHandlers() map[string]*commonEng.HTTPHandler { + handler := vm.chain.NewRPCHandler() + vm.chain.AttachEthService(handler, []string{"eth", "personal", "txpool"}) + handler.RegisterName("net", &NetAPI{vm}) + handler.RegisterName("snowman", &SnowmanAPI{vm}) + handler.RegisterName("web3", &Web3API{}) + handler.RegisterName("debug", &DebugAPI{vm}) + + return map[string]*commonEng.HTTPHandler{ + "/rpc": &commonEng.HTTPHandler{LockOptions: commonEng.NoLock, Handler: handler}, + "/ws": &commonEng.HTTPHandler{LockOptions: commonEng.NoLock, Handler: handler.WebsocketHandler([]string{"*"})}, + } +} + +// CreateStaticHandlers makes new http handlers that can handle API calls +func (vm *VM) CreateStaticHandlers() map[string]*commonEng.HTTPHandler { + handler := rpc.NewServer() + handler.RegisterName("static", &StaticService{}) + return map[string]*commonEng.HTTPHandler{ + "/rpc": &commonEng.HTTPHandler{LockOptions: commonEng.NoLock, Handler: handler}, + "/ws": &commonEng.HTTPHandler{LockOptions: commonEng.NoLock, Handler: handler.WebsocketHandler([]string{"*"})}, + } +} + +/* + ****************************************************************************** + *********************************** Helpers ********************************** + ****************************************************************************** + */ + +func (vm *VM) updateStatus(blockID ids.ID, status choices.Status) { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + if status == choices.Accepted { + vm.lastAccepted = vm.getBlock(blockID) + // TODO: improve this naive implementation + if atomic.SwapUint32(&vm.writingMetadata, 1) == 0 { + go vm.ctx.Log.RecoverAndPanic(vm.writeBackMetadata) + } + } + vm.blockStatusCache.Put(blockID, status) +} + +func (vm *VM) getCachedBlock(blockID ids.ID) *types.Block { + return vm.chain.GetBlockByHash(blockID.Key()) +} + +func (vm *VM) tryBlockGen() error { + vm.bdlock.Lock() + defer vm.bdlock.Unlock() + if vm.bdGenFlag { + // skip if one call already generates a block in this round + return nil + } + vm.bdGenWaitFlag = true + + vm.genlock.Lock() + defer vm.genlock.Unlock() + // get pending size + size, err := vm.chain.PendingSize() + if err != nil { + return err + } + if size == 0 { + return nil + } + + switch vm.bdTimerState { + case bdTimerStateMin: + return nil + case bdTimerStateMax: + if size < batchSize { + return nil + } + case bdTimerStateLong: + // timeout; go ahead and generate a new block anyway + } + select { + case vm.networkChan <- commonEng.PendingTxs: + // successfully push out the notification; this round ends + vm.bdGenFlag = true + default: + return errBlockFrequency + } + return nil +} + +func (vm *VM) getCachedStatus(blockID ids.ID) choices.Status { + vm.metalock.Lock() + defer vm.metalock.Unlock() + status := choices.Processing + + if statusIntf, ok := vm.blockStatusCache.Get(blockID); ok { + status = statusIntf.(choices.Status) + } else { + blk := vm.chain.GetBlockByHash(blockID.Key()) + if blk == nil { + return choices.Unknown + } + acceptedBlk := vm.lastAccepted.ethBlock + + // TODO: There must be a better way of doing this. + // Traverse up the chain from the lower block until the indices match + highBlock := blk + lowBlock := acceptedBlk + if highBlock.Number().Cmp(lowBlock.Number()) < 0 { + highBlock, lowBlock = lowBlock, highBlock + } + for highBlock.Number().Cmp(lowBlock.Number()) > 0 { + highBlock = vm.chain.GetBlockByHash(highBlock.ParentHash()) + } + + if highBlock.Hash() == lowBlock.Hash() { // on the same branch + if blk.Number().Cmp(acceptedBlk.Number()) <= 0 { + status = choices.Accepted + } + } else { // on different branches + status = choices.Rejected + } + } + + vm.blockStatusCache.Put(blockID, status) + return status +} + +func (vm *VM) getBlock(id ids.ID) *Block { + if blockIntf, ok := vm.blockCache.Get(id); ok { + return blockIntf.(*Block) + } + ethBlock := vm.getCachedBlock(id) + if ethBlock == nil { + return nil + } + block := &Block{ + id: ids.NewID(ethBlock.Hash()), + ethBlock: ethBlock, + vm: vm, + } + vm.blockCache.Put(id, block) + return block +} + +func (vm *VM) issueRemoteTxs(txs []*types.Transaction) error { + errs := vm.chain.AddRemoteTxs(txs) + for _, err := range errs { + if err != nil { + return err + } + } + return vm.tryBlockGen() +} + +func (vm *VM) writeBackMetadata() { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + b, err := rlp.EncodeToBytes(vm.lastAccepted.ethBlock.Hash()) + if err != nil { + vm.ctx.Log.Error("snowman-eth: error while writing back metadata") + return + } + vm.ctx.Log.Debug("writing back metadata") + vm.chaindb.Put([]byte(lastAcceptedKey), b) + atomic.StoreUint32(&vm.writingMetadata, 0) +} + +func (vm *VM) getLastAccepted() *Block { + vm.metalock.Lock() + defer vm.metalock.Unlock() + + return vm.lastAccepted +} diff --git a/plugin/evm/vm_genesis_parse_test.go b/plugin/evm/vm_genesis_parse_test.go new file mode 100644 index 0000000..9a113fb --- /dev/null +++ b/plugin/evm/vm_genesis_parse_test.go @@ -0,0 +1,32 @@ +// (c) 2019-2020, Ava Labs, Inc. All rights reserved. +// See the file LICENSE for licensing terms. + +package evm + +import ( + "encoding/json" + "testing" + + "github.com/ava-labs/coreth/core" +) + +func TestParseGenesis(t *testing.T) { + genesis := []byte(`{"config":{"chainId":43110,"homesteadBlock":0,"daoForkBlock":0,"daoForkSupport":true,"eip150Block":0,"eip150Hash":"0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0","eip155Block":0,"eip158Block":0,"byzantiumBlock":0,"constantinopleBlock":0,"petersburgBlock":0},"nonce":"0x0","timestamp":"0x0","extraData":"0x00","gasLimit":"0x5f5e100","difficulty":"0x0","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","coinbase":"0x0000000000000000000000000000000000000000","alloc":{"751a0b96e1042bee789452ecb20253fba40dbe85":{"balance":"0x33b2e3c9fd0804000000000"}},"number":"0x0","gasUsed":"0x0","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000"}`) + + genesisBlock := new(core.Genesis) + err := json.Unmarshal(genesis, genesisBlock) + if err != nil { + t.Fatal(err) + } + + marshalledBytes, err := json.Marshal(genesisBlock) + if err != nil { + t.Fatal(err) + } + + secondGenesisBlock := new(core.Genesis) + err = json.Unmarshal(marshalledBytes, secondGenesisBlock) + if err != nil { + t.Fatal(err) + } +} diff --git a/plugin/main.go b/plugin/main.go new file mode 100644 index 0000000..f5c9909 --- /dev/null +++ b/plugin/main.go @@ -0,0 +1,21 @@ +package main + +import ( + "github.com/hashicorp/go-plugin" + + "github.com/ava-labs/gecko/vms/rpcchainvm" + + "github.com/ava-labs/coreth/plugin/evm" +) + +func main() { + plugin.Serve(&plugin.ServeConfig{ + HandshakeConfig: rpcchainvm.Handshake, + Plugins: map[string]plugin.Plugin{ + "vm": rpcchainvm.New(&evm.VM{}), + }, + + // A non-nil value here enables gRPC serving for this plugin... + GRPCServer: plugin.DefaultGRPCServer, + }) +} |