forked from TrueCloudLab/neoneo-go
2264 lines
75 KiB
Go
2264 lines
75 KiB
Go
package core
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import (
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"bytes"
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"errors"
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"fmt"
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"math"
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"math/big"
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"sort"
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"sync"
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"sync/atomic"
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"time"
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"github.com/nspcc-dev/neo-go/pkg/config"
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
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"github.com/nspcc-dev/neo-go/pkg/core/blockchainer/services"
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"github.com/nspcc-dev/neo-go/pkg/core/dao"
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
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"github.com/nspcc-dev/neo-go/pkg/core/interop/contract"
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"github.com/nspcc-dev/neo-go/pkg/core/mempool"
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"github.com/nspcc-dev/neo-go/pkg/core/native"
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"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/stateroot"
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"github.com/nspcc-dev/neo-go/pkg/core/statesync"
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"github.com/nspcc-dev/neo-go/pkg/core/storage"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/util/slice"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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"go.uber.org/zap"
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)
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// Tuning parameters.
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const (
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headerBatchCount = 2000
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version = "0.1.4"
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defaultInitialGAS = 52000000_00000000
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defaultMemPoolSize = 50000
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defaultP2PNotaryRequestPayloadPoolSize = 1000
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defaultMaxBlockSize = 262144
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defaultMaxBlockSystemFee = 900000000000
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defaultMaxTraceableBlocks = 2102400 // 1 year of 15s blocks
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defaultMaxTransactionsPerBlock = 512
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// HeaderVerificationGasLimit is the maximum amount of GAS for block header verification.
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HeaderVerificationGasLimit = 3_00000000 // 3 GAS
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defaultStateSyncInterval = 40000
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// maxStorageBatchSize is the number of elements in storage batch expected to fit into the
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// storage without delays and problems. Estimated size of batch in case of given number of
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// elements does not exceed 1Mb.
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maxStorageBatchSize = 10000
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)
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// stateJumpStage denotes the stage of state jump process.
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type stateJumpStage byte
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const (
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// none means that no state jump process was initiated yet.
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none stateJumpStage = 1 << iota
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// stateJumpStarted means that state jump was just initiated, but outdated storage items
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// were not yet removed.
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stateJumpStarted
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// oldStorageItemsRemoved means that outdated contract storage items were removed, but
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// new storage items were not yet saved.
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oldStorageItemsRemoved
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// newStorageItemsAdded means that contract storage items are up-to-date with the current
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// state.
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newStorageItemsAdded
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// genesisStateRemoved means that state corresponding to the genesis block was removed
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// from the storage.
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genesisStateRemoved
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)
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var (
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// ErrAlreadyExists is returned when trying to add some already existing
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// transaction into the pool (not specifying whether it exists in the
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// chain or mempool).
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ErrAlreadyExists = errors.New("already exists")
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// ErrOOM is returned when adding transaction to the memory pool because
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// it reached its full capacity.
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ErrOOM = errors.New("no space left in the memory pool")
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// ErrPolicy is returned on attempt to add transaction that doesn't
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// comply with node's configured policy into the mempool.
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ErrPolicy = errors.New("not allowed by policy")
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// ErrInvalidBlockIndex is returned when trying to add block with index
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// other than expected height of the blockchain.
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ErrInvalidBlockIndex = errors.New("invalid block index")
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// ErrHasConflicts is returned when trying to add some transaction which
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// conflicts with other transaction in the chain or pool according to
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// Conflicts attribute.
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ErrHasConflicts = errors.New("has conflicts")
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)
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var (
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persistInterval = 1 * time.Second
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)
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// Blockchain represents the blockchain. It maintans internal state representing
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// the state of the ledger that can be accessed in various ways and changed by
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// adding new blocks or headers.
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type Blockchain struct {
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config config.ProtocolConfiguration
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// The only way chain state changes is by adding blocks, so we can't
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// allow concurrent block additions. It differs from the next lock in
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// that it's only for AddBlock method itself, the chain state is
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// protected by the lock below, but holding it during all of AddBlock
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// is too expensive (because the state only changes when persisting
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// change cache).
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addLock sync.Mutex
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// This lock ensures blockchain immutability for operations that need
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// that while performing their tasks. It's mostly used as a read lock
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// with the only writer being the block addition logic.
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lock sync.RWMutex
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// Data access object for CRUD operations around storage. It's write-cached.
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dao *dao.Simple
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// persistent is the same DB as dao, but we never write to it, so all reads
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// are directly from underlying persistent store.
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persistent *dao.Simple
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// Current index/height of the highest block.
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// Read access should always be called by BlockHeight().
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// Write access should only happen in storeBlock().
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blockHeight uint32
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// Current top Block wrapped in an atomic.Value for safe access.
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topBlock atomic.Value
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// Current persisted block count.
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persistedHeight uint32
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// Number of headers stored in the chain file.
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storedHeaderCount uint32
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// Header hashes list with associated lock.
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headerHashesLock sync.RWMutex
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headerHashes []util.Uint256
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// Stop synchronization mechanisms.
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stopCh chan struct{}
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runToExitCh chan struct{}
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memPool *mempool.Pool
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// postBlock is a set of callback methods which should be run under the Blockchain lock after new block is persisted.
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// Block's transactions are passed via mempool.
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postBlock []func(blockchainer.Blockchainer, *mempool.Pool, *block.Block)
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sbCommittee keys.PublicKeys
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log *zap.Logger
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lastBatch *storage.MemBatch
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contracts native.Contracts
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extensible atomic.Value
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// defaultBlockWitness stores transaction.Witness with m out of n multisig,
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// where n = ValidatorsCount.
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defaultBlockWitness atomic.Value
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stateRoot *stateroot.Module
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// Notification subsystem.
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events chan bcEvent
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subCh chan interface{}
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unsubCh chan interface{}
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}
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// bcEvent is an internal event generated by the Blockchain and then
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// broadcasted to other parties. It joins the new block and associated
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// invocation logs, all the other events visible from outside can be produced
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// from this combination.
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type bcEvent struct {
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block *block.Block
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appExecResults []*state.AppExecResult
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}
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// transferData is used for transfer caching during storeBlock.
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type transferData struct {
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Info state.NEP17TransferInfo
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Log state.NEP17TransferLog
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}
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// NewBlockchain returns a new blockchain object the will use the
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// given Store as its underlying storage. For it to work correctly you need
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// to spawn a goroutine for its Run method after this initialization.
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func NewBlockchain(s storage.Store, cfg config.ProtocolConfiguration, log *zap.Logger) (*Blockchain, error) {
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if log == nil {
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return nil, errors.New("empty logger")
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}
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if cfg.InitialGASSupply <= 0 {
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cfg.InitialGASSupply = fixedn.Fixed8(defaultInitialGAS)
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log.Info("initial gas supply is not set or wrong, setting default value", zap.String("InitialGASSupply", cfg.InitialGASSupply.String()))
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}
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if cfg.MemPoolSize <= 0 {
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cfg.MemPoolSize = defaultMemPoolSize
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log.Info("mempool size is not set or wrong, setting default value", zap.Int("MemPoolSize", cfg.MemPoolSize))
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}
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if cfg.P2PSigExtensions && cfg.P2PNotaryRequestPayloadPoolSize <= 0 {
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cfg.P2PNotaryRequestPayloadPoolSize = defaultP2PNotaryRequestPayloadPoolSize
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log.Info("P2PNotaryRequestPayloadPool size is not set or wrong, setting default value", zap.Int("P2PNotaryRequestPayloadPoolSize", cfg.P2PNotaryRequestPayloadPoolSize))
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}
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if cfg.MaxBlockSize == 0 {
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cfg.MaxBlockSize = defaultMaxBlockSize
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log.Info("MaxBlockSize is not set or wrong, setting default value", zap.Uint32("MaxBlockSize", cfg.MaxBlockSize))
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}
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if cfg.MaxBlockSystemFee <= 0 {
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cfg.MaxBlockSystemFee = defaultMaxBlockSystemFee
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log.Info("MaxBlockSystemFee is not set or wrong, setting default value", zap.Int64("MaxBlockSystemFee", cfg.MaxBlockSystemFee))
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}
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if cfg.MaxTraceableBlocks == 0 {
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cfg.MaxTraceableBlocks = defaultMaxTraceableBlocks
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log.Info("MaxTraceableBlocks is not set or wrong, using default value", zap.Uint32("MaxTraceableBlocks", cfg.MaxTraceableBlocks))
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}
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if cfg.MaxTransactionsPerBlock == 0 {
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cfg.MaxTransactionsPerBlock = defaultMaxTransactionsPerBlock
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log.Info("MaxTransactionsPerBlock is not set or wrong, using default value",
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zap.Uint16("MaxTransactionsPerBlock", cfg.MaxTransactionsPerBlock))
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}
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if cfg.MaxValidUntilBlockIncrement == 0 {
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const secondsPerDay = int(24 * time.Hour / time.Second)
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cfg.MaxValidUntilBlockIncrement = uint32(secondsPerDay / cfg.SecondsPerBlock)
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log.Info("MaxValidUntilBlockIncrement is not set or wrong, using default value",
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zap.Uint32("MaxValidUntilBlockIncrement", cfg.MaxValidUntilBlockIncrement))
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}
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if cfg.P2PStateExchangeExtensions {
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if !cfg.StateRootInHeader {
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return nil, errors.New("P2PStatesExchangeExtensions are enabled, but StateRootInHeader is off")
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}
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if cfg.StateSyncInterval <= 0 {
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cfg.StateSyncInterval = defaultStateSyncInterval
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log.Info("StateSyncInterval is not set or wrong, using default value",
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zap.Int("StateSyncInterval", cfg.StateSyncInterval))
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}
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}
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committee, err := committeeFromConfig(cfg)
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if err != nil {
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return nil, err
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}
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if len(cfg.NativeUpdateHistories) == 0 {
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cfg.NativeUpdateHistories = map[string][]uint32{}
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log.Info("NativeActivations are not set, using default values")
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}
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bc := &Blockchain{
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config: cfg,
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dao: dao.NewSimple(s, cfg.StateRootInHeader, cfg.P2PSigExtensions),
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persistent: dao.NewSimple(s, cfg.StateRootInHeader, cfg.P2PSigExtensions),
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stopCh: make(chan struct{}),
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runToExitCh: make(chan struct{}),
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memPool: mempool.New(cfg.MemPoolSize, 0, false),
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sbCommittee: committee,
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log: log,
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events: make(chan bcEvent),
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subCh: make(chan interface{}),
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unsubCh: make(chan interface{}),
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contracts: *native.NewContracts(cfg),
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}
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bc.stateRoot = stateroot.NewModule(bc, bc.log, bc.dao.Store)
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bc.contracts.Designate.StateRootService = bc.stateRoot
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if err := bc.init(); err != nil {
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return nil, err
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}
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return bc, nil
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}
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// SetOracle sets oracle module. It doesn't protected by mutex and
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// must be called before `bc.Run()` to avoid data race.
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func (bc *Blockchain) SetOracle(mod services.Oracle) {
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orc := bc.contracts.Oracle
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md, ok := orc.GetMethod(manifest.MethodVerify, -1)
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if !ok {
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panic(fmt.Errorf("%s method not found", manifest.MethodVerify))
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}
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mod.UpdateNativeContract(orc.NEF.Script, orc.GetOracleResponseScript(),
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orc.Hash, md.MD.Offset)
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orc.Module.Store(mod)
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bc.contracts.Designate.OracleService.Store(mod)
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}
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// SetNotary sets notary module. It doesn't protected by mutex and
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// must be called before `bc.Run()` to avoid data race.
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func (bc *Blockchain) SetNotary(mod services.Notary) {
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bc.contracts.Designate.NotaryService.Store(mod)
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}
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func (bc *Blockchain) init() error {
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// If we could not find the version in the Store, we know that there is nothing stored.
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ver, err := bc.dao.GetVersion()
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if err != nil {
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bc.log.Info("no storage version found! creating genesis block")
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if err = bc.dao.PutVersion(version); err != nil {
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return err
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}
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genesisBlock, err := createGenesisBlock(bc.config)
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if err != nil {
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return err
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}
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bc.headerHashes = []util.Uint256{genesisBlock.Hash()}
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err = bc.dao.PutCurrentHeader(hashAndIndexToBytes(genesisBlock.Hash(), genesisBlock.Index))
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if err != nil {
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return err
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}
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if err := bc.stateRoot.Init(0, bc.config.KeepOnlyLatestState); err != nil {
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return fmt.Errorf("can't init MPT: %w", err)
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}
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return bc.storeBlock(genesisBlock, nil)
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}
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if ver != version {
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return fmt.Errorf("storage version mismatch betweeen %s and %s", version, ver)
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}
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// At this point there was no version found in the storage which
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// implies a creating fresh storage with the version specified
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// and the genesis block as first block.
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bc.log.Info("restoring blockchain", zap.String("version", version))
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bc.headerHashes, err = bc.dao.GetHeaderHashes()
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if err != nil {
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return err
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}
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bc.storedHeaderCount = uint32(len(bc.headerHashes))
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currHeaderHeight, currHeaderHash, err := bc.dao.GetCurrentHeaderHeight()
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if err != nil {
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return err
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}
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if bc.storedHeaderCount == 0 && currHeaderHeight == 0 {
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bc.headerHashes = append(bc.headerHashes, currHeaderHash)
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}
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// There is a high chance that the Node is stopped before the next
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// batch of 2000 headers was stored. Via the currentHeaders stored we can sync
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// that with stored blocks.
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if currHeaderHeight >= bc.storedHeaderCount {
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hash := currHeaderHash
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var targetHash util.Uint256
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if len(bc.headerHashes) > 0 {
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targetHash = bc.headerHashes[len(bc.headerHashes)-1]
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} else {
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genesisBlock, err := createGenesisBlock(bc.config)
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if err != nil {
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return err
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}
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targetHash = genesisBlock.Hash()
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bc.headerHashes = append(bc.headerHashes, targetHash)
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}
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headers := make([]*block.Header, 0)
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for hash != targetHash {
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header, err := bc.GetHeader(hash)
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if err != nil {
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return fmt.Errorf("could not get header %s: %w", hash, err)
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}
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headers = append(headers, header)
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hash = header.PrevHash
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}
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headerSliceReverse(headers)
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for _, h := range headers {
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bc.headerHashes = append(bc.headerHashes, h.Hash())
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}
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}
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// Check whether StateJump stage is in the storage and continue interrupted state jump if so.
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jumpStage, err := bc.dao.Store.Get(storage.SYSStateJumpStage.Bytes())
|
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if err == nil {
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if !(bc.GetConfig().P2PStateExchangeExtensions && bc.GetConfig().RemoveUntraceableBlocks) {
|
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return errors.New("state jump was not completed, but P2PStateExchangeExtensions are disabled or archival node capability is on. " +
|
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"To start an archival node drop the database manually and restart the node")
|
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}
|
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if len(jumpStage) != 1 {
|
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return fmt.Errorf("invalid state jump stage format")
|
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}
|
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// State jump wasn't finished yet, thus continue it.
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stateSyncPoint, err := bc.dao.GetStateSyncPoint()
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if err != nil {
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return fmt.Errorf("failed to get state sync point from the storage")
|
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}
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return bc.jumpToStateInternal(stateSyncPoint, stateJumpStage(jumpStage[0]))
|
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}
|
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|
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bHeight, err := bc.dao.GetCurrentBlockHeight()
|
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if err != nil {
|
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return err
|
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}
|
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bc.blockHeight = bHeight
|
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bc.persistedHeight = bHeight
|
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if err = bc.stateRoot.Init(bHeight, bc.config.KeepOnlyLatestState); err != nil {
|
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return fmt.Errorf("can't init MPT at height %d: %w", bHeight, err)
|
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}
|
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|
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err = bc.contracts.NEO.InitializeCache(bc, bc.dao)
|
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if err != nil {
|
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return fmt.Errorf("can't init cache for NEO native contract: %w", err)
|
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}
|
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|
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err = bc.contracts.Management.InitializeCache(bc.dao)
|
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if err != nil {
|
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return fmt.Errorf("can't init cache for Management native contract: %w", err)
|
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}
|
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|
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// Check autogenerated native contracts' manifests and NEFs against the stored ones.
|
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// Need to be done after native Management cache initialisation to be able to get
|
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// contract state from DAO via high-level bc API.
|
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for _, c := range bc.contracts.Contracts {
|
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md := c.Metadata()
|
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history := md.UpdateHistory
|
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if len(history) == 0 || history[0] > bHeight {
|
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continue
|
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}
|
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storedCS := bc.GetContractState(md.Hash)
|
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if storedCS == nil {
|
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return fmt.Errorf("native contract %s is not stored", md.Name)
|
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}
|
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storedCSBytes, err := stackitem.SerializeConvertible(storedCS)
|
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if err != nil {
|
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return fmt.Errorf("failed to check native %s state against autogenerated one: %w", md.Name, err)
|
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}
|
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autogenCS := &state.Contract{
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ContractBase: md.ContractBase,
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UpdateCounter: storedCS.UpdateCounter, // it can be restored only from the DB, so use the stored value.
|
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}
|
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autogenCSBytes, err := stackitem.SerializeConvertible(autogenCS)
|
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if err != nil {
|
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return fmt.Errorf("failed to check native %s state against autogenerated one: %w", md.Name, err)
|
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}
|
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if !bytes.Equal(storedCSBytes, autogenCSBytes) {
|
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return fmt.Errorf("native %s: version mismatch (stored contract state differs from autogenerated one), "+
|
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"try to resynchronize the node from the genesis", md.Name)
|
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}
|
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}
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|
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return bc.updateExtensibleWhitelist(bHeight)
|
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}
|
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|
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// jumpToState is an atomic operation that changes Blockchain state to the one
|
|
// specified by the state sync point p. All the data needed for the jump must be
|
|
// collected by the state sync module.
|
|
func (bc *Blockchain) jumpToState(p uint32) error {
|
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bc.lock.Lock()
|
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defer bc.lock.Unlock()
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|
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return bc.jumpToStateInternal(p, none)
|
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}
|
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|
|
// jumpToStateInternal is an internal representation of jumpToState callback that
|
|
// changes Blockchain state to the one specified by state sync point p and state
|
|
// jump stage. All the data needed for the jump must be in the DB, otherwise an
|
|
// error is returned. It is not protected by mutex.
|
|
func (bc *Blockchain) jumpToStateInternal(p uint32, stage stateJumpStage) error {
|
|
if p+1 >= uint32(len(bc.headerHashes)) {
|
|
return fmt.Errorf("invalid state sync point %d: headerHeignt is %d", p, len(bc.headerHashes))
|
|
}
|
|
|
|
bc.log.Info("jumping to state sync point", zap.Uint32("state sync point", p))
|
|
|
|
writeBuf := io.NewBufBinWriter()
|
|
jumpStageKey := storage.SYSStateJumpStage.Bytes()
|
|
switch stage {
|
|
case none:
|
|
err := bc.dao.Store.Put(jumpStageKey, []byte{byte(stateJumpStarted)})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store state jump stage: %w", err)
|
|
}
|
|
fallthrough
|
|
case stateJumpStarted:
|
|
// Replace old storage items by new ones, it should be done step-by step.
|
|
// Firstly, remove all old genesis-related items.
|
|
b := bc.dao.Store.Batch()
|
|
bc.dao.Store.Seek([]byte{byte(storage.STStorage)}, func(k, _ []byte) {
|
|
// Must copy here, #1468.
|
|
key := slice.Copy(k)
|
|
b.Delete(key)
|
|
})
|
|
b.Put(jumpStageKey, []byte{byte(oldStorageItemsRemoved)})
|
|
err := bc.dao.Store.PutBatch(b)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store state jump stage: %w", err)
|
|
}
|
|
fallthrough
|
|
case oldStorageItemsRemoved:
|
|
// Then change STTempStorage prefix to STStorage. Each replace operation is atomic.
|
|
for {
|
|
count := 0
|
|
b := bc.dao.Store.Batch()
|
|
bc.dao.Store.Seek([]byte{byte(storage.STTempStorage)}, func(k, v []byte) {
|
|
if count >= maxStorageBatchSize {
|
|
return
|
|
}
|
|
// Must copy here, #1468.
|
|
oldKey := slice.Copy(k)
|
|
b.Delete(oldKey)
|
|
key := make([]byte, len(k))
|
|
key[0] = byte(storage.STStorage)
|
|
copy(key[1:], k[1:])
|
|
value := slice.Copy(v)
|
|
b.Put(key, value)
|
|
count += 2
|
|
})
|
|
if count > 0 {
|
|
err := bc.dao.Store.PutBatch(b)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to replace outdated contract storage items with the fresh ones: %w", err)
|
|
}
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
err := bc.dao.Store.Put(jumpStageKey, []byte{byte(newStorageItemsAdded)})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store state jump stage: %w", err)
|
|
}
|
|
fallthrough
|
|
case newStorageItemsAdded:
|
|
// After current state is updated, we need to remove outdated state-related data if so.
|
|
// The only outdated data we might have is genesis-related data, so check it.
|
|
if p-bc.config.MaxTraceableBlocks > 0 {
|
|
cache := bc.dao.GetWrapped()
|
|
writeBuf.Reset()
|
|
err := cache.DeleteBlock(bc.headerHashes[0], writeBuf)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to remove outdated state data for the genesis block: %w", err)
|
|
}
|
|
// TODO: remove NEP17 transfers and NEP17 transfer info for genesis block, #2096 related.
|
|
_, err = cache.Persist()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to drop genesis block state: %w", err)
|
|
}
|
|
}
|
|
err := bc.dao.Store.Put(jumpStageKey, []byte{byte(genesisStateRemoved)})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store state jump stage: %w", err)
|
|
}
|
|
case genesisStateRemoved:
|
|
// there's nothing to do after that, so just continue with common operations
|
|
// and remove state jump stage in the end.
|
|
default:
|
|
return errors.New("unknown state jump stage")
|
|
}
|
|
|
|
block, err := bc.dao.GetBlock(bc.headerHashes[p])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get current block: %w", err)
|
|
}
|
|
writeBuf.Reset()
|
|
err = bc.dao.StoreAsCurrentBlock(block, writeBuf)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store current block: %w", err)
|
|
}
|
|
bc.topBlock.Store(block)
|
|
atomic.StoreUint32(&bc.blockHeight, p)
|
|
atomic.StoreUint32(&bc.persistedHeight, p)
|
|
|
|
block, err = bc.dao.GetBlock(bc.headerHashes[p+1])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get block to init MPT: %w", err)
|
|
}
|
|
if err = bc.stateRoot.JumpToState(&state.MPTRoot{
|
|
Index: p,
|
|
Root: block.PrevStateRoot,
|
|
}, bc.config.KeepOnlyLatestState); err != nil {
|
|
return fmt.Errorf("can't perform MPT jump to height %d: %w", p, err)
|
|
}
|
|
|
|
err = bc.contracts.NEO.InitializeCache(bc, bc.dao)
|
|
if err != nil {
|
|
return fmt.Errorf("can't init cache for NEO native contract: %w", err)
|
|
}
|
|
err = bc.contracts.Management.InitializeCache(bc.dao)
|
|
if err != nil {
|
|
return fmt.Errorf("can't init cache for Management native contract: %w", err)
|
|
}
|
|
bc.contracts.Designate.InitializeCache()
|
|
|
|
if err := bc.updateExtensibleWhitelist(p); err != nil {
|
|
return fmt.Errorf("failed to update extensible whitelist: %w", err)
|
|
}
|
|
|
|
updateBlockHeightMetric(p)
|
|
|
|
err = bc.dao.Store.Delete(jumpStageKey)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to remove outdated state jump stage: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Run runs chain loop, it needs to be run as goroutine and executing it is
|
|
// critical for correct Blockchain operation.
|
|
func (bc *Blockchain) Run() {
|
|
persistTimer := time.NewTimer(persistInterval)
|
|
defer func() {
|
|
persistTimer.Stop()
|
|
if _, err := bc.persist(); err != nil {
|
|
bc.log.Warn("failed to persist", zap.Error(err))
|
|
}
|
|
if err := bc.dao.Store.Close(); err != nil {
|
|
bc.log.Warn("failed to close db", zap.Error(err))
|
|
}
|
|
close(bc.runToExitCh)
|
|
}()
|
|
go bc.notificationDispatcher()
|
|
for {
|
|
select {
|
|
case <-bc.stopCh:
|
|
return
|
|
case <-persistTimer.C:
|
|
dur, err := bc.persist()
|
|
if err != nil {
|
|
bc.log.Warn("failed to persist blockchain", zap.Error(err))
|
|
}
|
|
interval := persistInterval - dur
|
|
if interval <= 0 {
|
|
interval = time.Microsecond // Reset doesn't work with zero value
|
|
}
|
|
persistTimer.Reset(interval)
|
|
}
|
|
}
|
|
}
|
|
|
|
// notificationDispatcher manages subscription to events and broadcasts new events.
|
|
func (bc *Blockchain) notificationDispatcher() {
|
|
var (
|
|
// These are just sets of subscribers, though modelled as maps
|
|
// for ease of management (not a lot of subscriptions is really
|
|
// expected, but maps are convenient for adding/deleting elements).
|
|
blockFeed = make(map[chan<- *block.Block]bool)
|
|
txFeed = make(map[chan<- *transaction.Transaction]bool)
|
|
notificationFeed = make(map[chan<- *state.NotificationEvent]bool)
|
|
executionFeed = make(map[chan<- *state.AppExecResult]bool)
|
|
)
|
|
for {
|
|
select {
|
|
case <-bc.stopCh:
|
|
return
|
|
case sub := <-bc.subCh:
|
|
switch ch := sub.(type) {
|
|
case chan<- *block.Block:
|
|
blockFeed[ch] = true
|
|
case chan<- *transaction.Transaction:
|
|
txFeed[ch] = true
|
|
case chan<- *state.NotificationEvent:
|
|
notificationFeed[ch] = true
|
|
case chan<- *state.AppExecResult:
|
|
executionFeed[ch] = true
|
|
default:
|
|
panic(fmt.Sprintf("bad subscription: %T", sub))
|
|
}
|
|
case unsub := <-bc.unsubCh:
|
|
switch ch := unsub.(type) {
|
|
case chan<- *block.Block:
|
|
delete(blockFeed, ch)
|
|
case chan<- *transaction.Transaction:
|
|
delete(txFeed, ch)
|
|
case chan<- *state.NotificationEvent:
|
|
delete(notificationFeed, ch)
|
|
case chan<- *state.AppExecResult:
|
|
delete(executionFeed, ch)
|
|
default:
|
|
panic(fmt.Sprintf("bad unsubscription: %T", unsub))
|
|
}
|
|
case event := <-bc.events:
|
|
// We don't want to waste time looping through transactions when there are no
|
|
// subscribers.
|
|
if len(txFeed) != 0 || len(notificationFeed) != 0 || len(executionFeed) != 0 {
|
|
aer := event.appExecResults[0]
|
|
if !aer.Container.Equals(event.block.Hash()) {
|
|
panic("inconsistent application execution results")
|
|
}
|
|
for ch := range executionFeed {
|
|
ch <- aer
|
|
}
|
|
for i := range aer.Events {
|
|
for ch := range notificationFeed {
|
|
ch <- &aer.Events[i]
|
|
}
|
|
}
|
|
|
|
aerIdx := 1
|
|
for _, tx := range event.block.Transactions {
|
|
aer := event.appExecResults[aerIdx]
|
|
if !aer.Container.Equals(tx.Hash()) {
|
|
panic("inconsistent application execution results")
|
|
}
|
|
aerIdx++
|
|
for ch := range executionFeed {
|
|
ch <- aer
|
|
}
|
|
if aer.VMState == vm.HaltState {
|
|
for i := range aer.Events {
|
|
for ch := range notificationFeed {
|
|
ch <- &aer.Events[i]
|
|
}
|
|
}
|
|
}
|
|
for ch := range txFeed {
|
|
ch <- tx
|
|
}
|
|
}
|
|
|
|
aer = event.appExecResults[aerIdx]
|
|
if !aer.Container.Equals(event.block.Hash()) {
|
|
panic("inconsistent application execution results")
|
|
}
|
|
for ch := range executionFeed {
|
|
ch <- aer
|
|
}
|
|
for i := range aer.Events {
|
|
for ch := range notificationFeed {
|
|
ch <- &aer.Events[i]
|
|
}
|
|
}
|
|
}
|
|
for ch := range blockFeed {
|
|
ch <- event.block
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Close stops Blockchain's internal loop, syncs changes to persistent storage
|
|
// and closes it. The Blockchain is no longer functional after the call to Close.
|
|
func (bc *Blockchain) Close() {
|
|
// If there is a block addition in progress, wait for it to finish and
|
|
// don't allow new ones.
|
|
bc.addLock.Lock()
|
|
close(bc.stopCh)
|
|
<-bc.runToExitCh
|
|
bc.addLock.Unlock()
|
|
}
|
|
|
|
// AddBlock accepts successive block for the Blockchain, verifies it and
|
|
// stores internally. Eventually it will be persisted to the backing storage.
|
|
func (bc *Blockchain) AddBlock(block *block.Block) error {
|
|
bc.addLock.Lock()
|
|
defer bc.addLock.Unlock()
|
|
|
|
var mp *mempool.Pool
|
|
expectedHeight := bc.BlockHeight() + 1
|
|
if expectedHeight != block.Index {
|
|
return fmt.Errorf("expected %d, got %d: %w", expectedHeight, block.Index, ErrInvalidBlockIndex)
|
|
}
|
|
if bc.config.StateRootInHeader != block.StateRootEnabled {
|
|
return fmt.Errorf("%w: %v != %v",
|
|
ErrHdrStateRootSetting, bc.config.StateRootInHeader, block.StateRootEnabled)
|
|
}
|
|
|
|
if block.Index == bc.HeaderHeight()+1 {
|
|
err := bc.addHeaders(bc.config.VerifyBlocks, &block.Header)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if bc.config.VerifyBlocks {
|
|
merkle := block.ComputeMerkleRoot()
|
|
if !block.MerkleRoot.Equals(merkle) {
|
|
return errors.New("invalid block: MerkleRoot mismatch")
|
|
}
|
|
mp = mempool.New(len(block.Transactions), 0, false)
|
|
for _, tx := range block.Transactions {
|
|
var err error
|
|
// Transactions are verified before adding them
|
|
// into the pool, so there is no point in doing
|
|
// it again even if we're verifying in-block transactions.
|
|
if bc.memPool.ContainsKey(tx.Hash()) {
|
|
err = mp.Add(tx, bc)
|
|
if err == nil {
|
|
continue
|
|
}
|
|
} else {
|
|
err = bc.verifyAndPoolTx(tx, mp, bc)
|
|
}
|
|
if err != nil && bc.config.VerifyTransactions {
|
|
return fmt.Errorf("transaction %s failed to verify: %w", tx.Hash().StringLE(), err)
|
|
}
|
|
}
|
|
}
|
|
return bc.storeBlock(block, mp)
|
|
}
|
|
|
|
// AddHeaders processes the given headers and add them to the
|
|
// HeaderHashList. It expects headers to be sorted by index.
|
|
func (bc *Blockchain) AddHeaders(headers ...*block.Header) error {
|
|
return bc.addHeaders(bc.config.VerifyBlocks, headers...)
|
|
}
|
|
|
|
// addHeaders is an internal implementation of AddHeaders (`verify` parameter
|
|
// tells it to verify or not verify given headers).
|
|
func (bc *Blockchain) addHeaders(verify bool, headers ...*block.Header) error {
|
|
var (
|
|
start = time.Now()
|
|
batch = bc.dao.Store.Batch()
|
|
err error
|
|
)
|
|
|
|
if len(headers) > 0 {
|
|
var i int
|
|
curHeight := bc.HeaderHeight()
|
|
for i = range headers {
|
|
if headers[i].Index > curHeight {
|
|
break
|
|
}
|
|
}
|
|
headers = headers[i:]
|
|
}
|
|
|
|
if len(headers) == 0 {
|
|
return nil
|
|
} else if verify {
|
|
// Verify that the chain of the headers is consistent.
|
|
var lastHeader *block.Header
|
|
if lastHeader, err = bc.GetHeader(headers[0].PrevHash); err != nil {
|
|
return fmt.Errorf("previous header was not found: %w", err)
|
|
}
|
|
for _, h := range headers {
|
|
if err = bc.verifyHeader(h, lastHeader); err != nil {
|
|
return err
|
|
}
|
|
lastHeader = h
|
|
}
|
|
}
|
|
|
|
buf := io.NewBufBinWriter()
|
|
bc.headerHashesLock.Lock()
|
|
defer bc.headerHashesLock.Unlock()
|
|
oldlen := len(bc.headerHashes)
|
|
var lastHeader *block.Header
|
|
for _, h := range headers {
|
|
if int(h.Index) != len(bc.headerHashes) {
|
|
continue
|
|
}
|
|
bc.headerHashes = append(bc.headerHashes, h.Hash())
|
|
h.EncodeBinary(buf.BinWriter)
|
|
buf.BinWriter.WriteB(0)
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
|
|
key := storage.AppendPrefix(storage.DataBlock, h.Hash().BytesBE())
|
|
batch.Put(key, buf.Bytes())
|
|
buf.Reset()
|
|
lastHeader = h
|
|
}
|
|
|
|
if oldlen != len(bc.headerHashes) {
|
|
for int(lastHeader.Index)-headerBatchCount >= int(bc.storedHeaderCount) {
|
|
buf.WriteArray(bc.headerHashes[bc.storedHeaderCount : bc.storedHeaderCount+headerBatchCount])
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
|
|
key := storage.AppendPrefixInt(storage.IXHeaderHashList, int(bc.storedHeaderCount))
|
|
batch.Put(key, buf.Bytes())
|
|
bc.storedHeaderCount += headerBatchCount
|
|
}
|
|
|
|
batch.Put(storage.SYSCurrentHeader.Bytes(), hashAndIndexToBytes(lastHeader.Hash(), lastHeader.Index))
|
|
updateHeaderHeightMetric(len(bc.headerHashes) - 1)
|
|
if err = bc.dao.Store.PutBatch(batch); err != nil {
|
|
return err
|
|
}
|
|
bc.log.Debug("done processing headers",
|
|
zap.Int("headerIndex", len(bc.headerHashes)-1),
|
|
zap.Uint32("blockHeight", bc.BlockHeight()),
|
|
zap.Duration("took", time.Since(start)))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetStateModule returns state root service instance.
|
|
func (bc *Blockchain) GetStateModule() blockchainer.StateRoot {
|
|
return bc.stateRoot
|
|
}
|
|
|
|
// GetStateSyncModule returns new state sync service instance.
|
|
func (bc *Blockchain) GetStateSyncModule() blockchainer.StateSync {
|
|
return statesync.NewModule(bc, bc.log, bc.dao, bc.jumpToState)
|
|
}
|
|
|
|
// storeBlock performs chain update using the block given, it executes all
|
|
// transactions with all appropriate side-effects and updates Blockchain state.
|
|
// This is the only way to change Blockchain state.
|
|
func (bc *Blockchain) storeBlock(block *block.Block, txpool *mempool.Pool) error {
|
|
var (
|
|
cache = bc.dao.GetWrapped()
|
|
appExecResults = make([]*state.AppExecResult, 0, 2+len(block.Transactions))
|
|
aerchan = make(chan *state.AppExecResult, len(block.Transactions)/8) // Tested 8 and 4 with no practical difference, but feel free to test more and tune.
|
|
aerdone = make(chan error)
|
|
blockdone = make(chan error)
|
|
)
|
|
go func() {
|
|
var (
|
|
kvcache = cache.GetWrapped()
|
|
writeBuf = io.NewBufBinWriter()
|
|
)
|
|
if err := kvcache.StoreAsBlock(block, writeBuf); err != nil {
|
|
blockdone <- err
|
|
return
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
if err := kvcache.StoreAsCurrentBlock(block, writeBuf); err != nil {
|
|
blockdone <- err
|
|
return
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
for _, tx := range block.Transactions {
|
|
if err := kvcache.StoreAsTransaction(tx, block.Index, writeBuf); err != nil {
|
|
blockdone <- err
|
|
return
|
|
}
|
|
|
|
writeBuf.Reset()
|
|
}
|
|
if bc.config.RemoveUntraceableBlocks {
|
|
var start, stop uint32
|
|
if bc.config.P2PStateExchangeExtensions {
|
|
// remove batch of old blocks starting from P2-MaxTraceableBlocks-StateSyncInterval up to P2-MaxTraceableBlocks
|
|
if block.Index >= 2*uint32(bc.config.StateSyncInterval) &&
|
|
block.Index >= uint32(bc.config.StateSyncInterval)+bc.config.MaxTraceableBlocks && // check this in case if MaxTraceableBlocks>StateSyncInterval
|
|
int(block.Index)%bc.config.StateSyncInterval == 0 {
|
|
stop = block.Index - uint32(bc.config.StateSyncInterval) - bc.config.MaxTraceableBlocks
|
|
if stop > uint32(bc.config.StateSyncInterval) {
|
|
start = stop - uint32(bc.config.StateSyncInterval)
|
|
}
|
|
}
|
|
} else if block.Index > bc.config.MaxTraceableBlocks {
|
|
start = block.Index - bc.config.MaxTraceableBlocks // is at least 1
|
|
stop = start + 1
|
|
}
|
|
for index := start; index < stop; index++ {
|
|
err := kvcache.DeleteBlock(bc.headerHashes[index], writeBuf)
|
|
if err != nil {
|
|
bc.log.Warn("error while removing old block",
|
|
zap.Uint32("index", index),
|
|
zap.Error(err))
|
|
}
|
|
writeBuf.Reset()
|
|
}
|
|
}
|
|
_, err := kvcache.Persist()
|
|
if err != nil {
|
|
blockdone <- err
|
|
}
|
|
close(blockdone)
|
|
}()
|
|
go func() {
|
|
var (
|
|
kvcache = cache.GetWrapped()
|
|
writeBuf = io.NewBufBinWriter()
|
|
err error
|
|
appendBlock bool
|
|
transCache = make(map[util.Uint160]transferData)
|
|
)
|
|
for aer := range aerchan {
|
|
if aer.Container == block.Hash() && appendBlock {
|
|
err = kvcache.AppendAppExecResult(aer, writeBuf)
|
|
} else {
|
|
err = kvcache.PutAppExecResult(aer, writeBuf)
|
|
if aer.Container == block.Hash() {
|
|
appendBlock = true
|
|
}
|
|
}
|
|
if err != nil {
|
|
err = fmt.Errorf("failed to store exec result: %w", err)
|
|
break
|
|
}
|
|
if aer.Execution.VMState == vm.HaltState {
|
|
for j := range aer.Execution.Events {
|
|
bc.handleNotification(&aer.Execution.Events[j], kvcache, transCache, block, aer.Container)
|
|
}
|
|
}
|
|
writeBuf.Reset()
|
|
}
|
|
if err != nil {
|
|
aerdone <- err
|
|
return
|
|
}
|
|
for acc, trData := range transCache {
|
|
err = kvcache.PutNEP17TransferInfo(acc, &trData.Info)
|
|
if err != nil {
|
|
aerdone <- err
|
|
return
|
|
}
|
|
err = kvcache.PutNEP17TransferLog(acc, trData.Info.NextTransferBatch, &trData.Log)
|
|
if err != nil {
|
|
aerdone <- err
|
|
return
|
|
}
|
|
}
|
|
|
|
_, err = kvcache.Persist()
|
|
if err != nil {
|
|
aerdone <- err
|
|
}
|
|
close(aerdone)
|
|
}()
|
|
aer, err := bc.runPersist(bc.contracts.GetPersistScript(), block, cache, trigger.OnPersist)
|
|
if err != nil {
|
|
// Release goroutines, don't care about errors, we already have one.
|
|
close(aerchan)
|
|
<-blockdone
|
|
<-aerdone
|
|
return fmt.Errorf("onPersist failed: %w", err)
|
|
}
|
|
appExecResults = append(appExecResults, aer)
|
|
aerchan <- aer
|
|
|
|
for _, tx := range block.Transactions {
|
|
systemInterop := bc.newInteropContext(trigger.Application, cache, block, tx)
|
|
v := systemInterop.SpawnVM()
|
|
v.LoadScriptWithFlags(tx.Script, callflag.All)
|
|
v.SetPriceGetter(systemInterop.GetPrice)
|
|
v.LoadToken = contract.LoadToken(systemInterop)
|
|
v.GasLimit = tx.SystemFee
|
|
|
|
err := v.Run()
|
|
var faultException string
|
|
if !v.HasFailed() {
|
|
_, err := systemInterop.DAO.Persist()
|
|
if err != nil {
|
|
// Release goroutines, don't care about errors, we already have one.
|
|
close(aerchan)
|
|
<-blockdone
|
|
<-aerdone
|
|
return fmt.Errorf("failed to persist invocation results: %w", err)
|
|
}
|
|
} else {
|
|
bc.log.Warn("contract invocation failed",
|
|
zap.String("tx", tx.Hash().StringLE()),
|
|
zap.Uint32("block", block.Index),
|
|
zap.Error(err))
|
|
faultException = err.Error()
|
|
}
|
|
aer := &state.AppExecResult{
|
|
Container: tx.Hash(),
|
|
Execution: state.Execution{
|
|
Trigger: trigger.Application,
|
|
VMState: v.State(),
|
|
GasConsumed: v.GasConsumed(),
|
|
Stack: v.Estack().ToArray(),
|
|
Events: systemInterop.Notifications,
|
|
FaultException: faultException,
|
|
},
|
|
}
|
|
appExecResults = append(appExecResults, aer)
|
|
aerchan <- aer
|
|
}
|
|
|
|
aer, err = bc.runPersist(bc.contracts.GetPostPersistScript(), block, cache, trigger.PostPersist)
|
|
if err != nil {
|
|
// Release goroutines, don't care about errors, we already have one.
|
|
close(aerchan)
|
|
<-blockdone
|
|
<-aerdone
|
|
return fmt.Errorf("postPersist failed: %w", err)
|
|
}
|
|
appExecResults = append(appExecResults, aer)
|
|
aerchan <- aer
|
|
close(aerchan)
|
|
d := cache.(*dao.Simple)
|
|
b := d.GetMPTBatch()
|
|
mpt, sr, err := bc.stateRoot.AddMPTBatch(block.Index, b, d.Store)
|
|
if err != nil {
|
|
// Release goroutines, don't care about errors, we already have one.
|
|
<-blockdone
|
|
<-aerdone
|
|
// Here MPT can be left in a half-applied state.
|
|
// However if this error occurs, this is a bug somewhere in code
|
|
// because changes applied are the ones from HALTed transactions.
|
|
return fmt.Errorf("error while trying to apply MPT changes: %w", err)
|
|
}
|
|
if bc.config.StateRootInHeader && bc.HeaderHeight() > sr.Index {
|
|
h, err := bc.GetHeader(bc.GetHeaderHash(int(sr.Index) + 1))
|
|
if err != nil {
|
|
err = fmt.Errorf("failed to get next header: %w", err)
|
|
} else if h.PrevStateRoot != sr.Root {
|
|
err = fmt.Errorf("local stateroot and next header's PrevStateRoot mismatch: %s vs %s", sr.Root.StringBE(), h.PrevStateRoot.StringBE())
|
|
}
|
|
if err != nil {
|
|
// Release goroutines, don't care about errors, we already have one.
|
|
<-blockdone
|
|
<-aerdone
|
|
return err
|
|
}
|
|
}
|
|
|
|
if bc.config.SaveStorageBatch {
|
|
bc.lastBatch = d.GetBatch()
|
|
}
|
|
// Every persist cycle we also compact our in-memory MPT. It's flushed
|
|
// already in AddMPTBatch, so collapsing it is safe.
|
|
persistedHeight := atomic.LoadUint32(&bc.persistedHeight)
|
|
if persistedHeight == block.Index-1 {
|
|
// 10 is good and roughly estimated to fit remaining trie into 1M of memory.
|
|
mpt.Collapse(10)
|
|
}
|
|
|
|
// Wait for _both_ goroutines to finish.
|
|
blockerr := <-blockdone
|
|
aererr := <-aerdone
|
|
if blockerr != nil {
|
|
return blockerr
|
|
}
|
|
if aererr != nil {
|
|
return aererr
|
|
}
|
|
|
|
bc.lock.Lock()
|
|
_, err = cache.Persist()
|
|
if err != nil {
|
|
bc.lock.Unlock()
|
|
return err
|
|
}
|
|
|
|
mpt.Store = bc.dao.Store
|
|
bc.stateRoot.UpdateCurrentLocal(mpt, sr)
|
|
bc.topBlock.Store(block)
|
|
atomic.StoreUint32(&bc.blockHeight, block.Index)
|
|
bc.memPool.RemoveStale(func(tx *transaction.Transaction) bool { return bc.IsTxStillRelevant(tx, txpool, false) }, bc)
|
|
for _, f := range bc.postBlock {
|
|
f(bc, txpool, block)
|
|
}
|
|
if err := bc.updateExtensibleWhitelist(block.Index); err != nil {
|
|
bc.lock.Unlock()
|
|
return err
|
|
}
|
|
bc.lock.Unlock()
|
|
|
|
updateBlockHeightMetric(block.Index)
|
|
// Genesis block is stored when Blockchain is not yet running, so there
|
|
// is no one to read this event. And it doesn't make much sense as event
|
|
// anyway.
|
|
if block.Index != 0 {
|
|
bc.events <- bcEvent{block, appExecResults}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (bc *Blockchain) updateExtensibleWhitelist(height uint32) error {
|
|
updateCommittee := native.ShouldUpdateCommittee(height, bc)
|
|
stateVals, sh, err := bc.contracts.Designate.GetDesignatedByRole(bc.dao, noderoles.StateValidator, height)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if bc.extensible.Load() != nil && !updateCommittee && sh != height {
|
|
return nil
|
|
}
|
|
|
|
newList := []util.Uint160{bc.contracts.NEO.GetCommitteeAddress()}
|
|
nextVals := bc.contracts.NEO.GetNextBlockValidatorsInternal()
|
|
script, err := smartcontract.CreateDefaultMultiSigRedeemScript(nextVals)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
newList = append(newList, hash.Hash160(script))
|
|
bc.updateExtensibleList(&newList, bc.contracts.NEO.GetNextBlockValidatorsInternal())
|
|
|
|
if len(stateVals) > 0 {
|
|
h, err := bc.contracts.Designate.GetLastDesignatedHash(bc.dao, noderoles.StateValidator)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
newList = append(newList, h)
|
|
bc.updateExtensibleList(&newList, stateVals)
|
|
}
|
|
|
|
sort.Slice(newList, func(i, j int) bool {
|
|
return newList[i].Less(newList[j])
|
|
})
|
|
bc.extensible.Store(newList)
|
|
return nil
|
|
}
|
|
|
|
func (bc *Blockchain) updateExtensibleList(s *[]util.Uint160, pubs keys.PublicKeys) {
|
|
for _, pub := range pubs {
|
|
*s = append(*s, pub.GetScriptHash())
|
|
}
|
|
}
|
|
|
|
// IsExtensibleAllowed determines if script hash is allowed to send extensible payloads.
|
|
func (bc *Blockchain) IsExtensibleAllowed(u util.Uint160) bool {
|
|
us := bc.extensible.Load().([]util.Uint160)
|
|
n := sort.Search(len(us), func(i int) bool { return !us[i].Less(u) })
|
|
return n < len(us)
|
|
}
|
|
|
|
func (bc *Blockchain) runPersist(script []byte, block *block.Block, cache dao.DAO, trig trigger.Type) (*state.AppExecResult, error) {
|
|
systemInterop := bc.newInteropContext(trig, cache, block, nil)
|
|
v := systemInterop.SpawnVM()
|
|
v.LoadScriptWithFlags(script, callflag.All)
|
|
v.SetPriceGetter(systemInterop.GetPrice)
|
|
if err := v.Run(); err != nil {
|
|
return nil, fmt.Errorf("VM has failed: %w", err)
|
|
} else if _, err := systemInterop.DAO.Persist(); err != nil {
|
|
return nil, fmt.Errorf("can't save changes: %w", err)
|
|
}
|
|
return &state.AppExecResult{
|
|
Container: block.Hash(), // application logs can be retrieved by block hash
|
|
Execution: state.Execution{
|
|
Trigger: trig,
|
|
VMState: v.State(),
|
|
GasConsumed: v.GasConsumed(),
|
|
Stack: v.Estack().ToArray(),
|
|
Events: systemInterop.Notifications,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
func (bc *Blockchain) handleNotification(note *state.NotificationEvent, d dao.DAO,
|
|
transCache map[util.Uint160]transferData, b *block.Block, h util.Uint256) {
|
|
if note.Name != "Transfer" {
|
|
return
|
|
}
|
|
arr, ok := note.Item.Value().([]stackitem.Item)
|
|
if !ok || len(arr) != 3 {
|
|
return
|
|
}
|
|
from, err := parseUint160(arr[0])
|
|
if err != nil {
|
|
return
|
|
}
|
|
to, err := parseUint160(arr[1])
|
|
if err != nil {
|
|
return
|
|
}
|
|
amount, err := arr[2].TryInteger()
|
|
if err != nil {
|
|
return
|
|
}
|
|
bc.processNEP17Transfer(d, transCache, h, b, note.ScriptHash, from, to, amount)
|
|
}
|
|
|
|
func parseUint160(itm stackitem.Item) (util.Uint160, error) {
|
|
_, ok := itm.(stackitem.Null) // Minting or burning.
|
|
if ok {
|
|
return util.Uint160{}, nil
|
|
}
|
|
bytes, err := itm.TryBytes()
|
|
if err != nil {
|
|
return util.Uint160{}, err
|
|
}
|
|
return util.Uint160DecodeBytesBE(bytes)
|
|
}
|
|
|
|
func (bc *Blockchain) processNEP17Transfer(cache dao.DAO, transCache map[util.Uint160]transferData,
|
|
h util.Uint256, b *block.Block, sc util.Uint160, from util.Uint160, to util.Uint160, amount *big.Int) {
|
|
var id int32
|
|
nativeContract := bc.contracts.ByHash(sc)
|
|
if nativeContract != nil {
|
|
id = nativeContract.Metadata().ID
|
|
} else {
|
|
assetContract, err := bc.contracts.Management.GetContract(cache, sc)
|
|
if err != nil {
|
|
return
|
|
}
|
|
id = assetContract.ID
|
|
}
|
|
transfer := &state.NEP17Transfer{
|
|
Asset: id,
|
|
From: from,
|
|
To: to,
|
|
Block: b.Index,
|
|
Timestamp: b.Timestamp,
|
|
Tx: h,
|
|
}
|
|
if !from.Equals(util.Uint160{}) {
|
|
_ = transfer.Amount.Neg(amount) // We already have the Int.
|
|
if appendNEP17Transfer(cache, transCache, from, transfer) != nil {
|
|
return
|
|
}
|
|
}
|
|
if !to.Equals(util.Uint160{}) {
|
|
_ = transfer.Amount.Set(amount) // We already have the Int.
|
|
_ = appendNEP17Transfer(cache, transCache, to, transfer) // Nothing useful we can do.
|
|
}
|
|
}
|
|
|
|
func appendNEP17Transfer(cache dao.DAO, transCache map[util.Uint160]transferData, addr util.Uint160, transfer *state.NEP17Transfer) error {
|
|
transferData, ok := transCache[addr]
|
|
if !ok {
|
|
balances, err := cache.GetNEP17TransferInfo(addr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !balances.NewBatch {
|
|
trLog, err := cache.GetNEP17TransferLog(addr, balances.NextTransferBatch)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
transferData.Log = *trLog
|
|
}
|
|
transferData.Info = *balances
|
|
}
|
|
err := transferData.Log.Append(transfer)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
transferData.Info.LastUpdated[transfer.Asset] = transfer.Block
|
|
transferData.Info.NewBatch = transferData.Log.Size() >= state.NEP17TransferBatchSize
|
|
if transferData.Info.NewBatch {
|
|
err = cache.PutNEP17TransferLog(addr, transferData.Info.NextTransferBatch, &transferData.Log)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
transferData.Info.NextTransferBatch++
|
|
transferData.Log = state.NEP17TransferLog{}
|
|
}
|
|
transCache[addr] = transferData
|
|
return nil
|
|
}
|
|
|
|
// ForEachNEP17Transfer executes f for each nep17 transfer in log.
|
|
func (bc *Blockchain) ForEachNEP17Transfer(acc util.Uint160, f func(*state.NEP17Transfer) (bool, error)) error {
|
|
balances, err := bc.dao.GetNEP17TransferInfo(acc)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
for i := int(balances.NextTransferBatch); i >= 0; i-- {
|
|
lg, err := bc.dao.GetNEP17TransferLog(acc, uint32(i))
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
cont, err := lg.ForEach(f)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !cont {
|
|
break
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetNEP17Contracts returns the list of deployed NEP17 contracts.
|
|
func (bc *Blockchain) GetNEP17Contracts() []util.Uint160 {
|
|
return bc.contracts.Management.GetNEP17Contracts()
|
|
}
|
|
|
|
// GetNEP17LastUpdated returns a set of contract ids with the corresponding last updated
|
|
// block indexes. In case of an empty account, latest stored state synchronisation point
|
|
// is returned under Math.MinInt32 key.
|
|
func (bc *Blockchain) GetNEP17LastUpdated(acc util.Uint160) (map[int32]uint32, error) {
|
|
info, err := bc.dao.GetNEP17TransferInfo(acc)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if bc.config.P2PStateExchangeExtensions && bc.config.RemoveUntraceableBlocks {
|
|
if _, ok := info.LastUpdated[bc.contracts.NEO.ID]; !ok {
|
|
nBalance, lub := bc.contracts.NEO.BalanceOf(bc.dao, acc)
|
|
if nBalance.Sign() != 0 {
|
|
info.LastUpdated[bc.contracts.NEO.ID] = lub
|
|
}
|
|
}
|
|
}
|
|
stateSyncPoint, err := bc.dao.GetStateSyncPoint()
|
|
if err == nil {
|
|
info.LastUpdated[math.MinInt32] = stateSyncPoint
|
|
}
|
|
return info.LastUpdated, nil
|
|
}
|
|
|
|
// GetUtilityTokenBalance returns utility token (GAS) balance for the acc.
|
|
func (bc *Blockchain) GetUtilityTokenBalance(acc util.Uint160) *big.Int {
|
|
bs := bc.contracts.GAS.BalanceOf(bc.dao, acc)
|
|
if bs == nil {
|
|
return big.NewInt(0)
|
|
}
|
|
return bs
|
|
}
|
|
|
|
// GetGoverningTokenBalance returns governing token (NEO) balance and the height
|
|
// of the last balance change for the account.
|
|
func (bc *Blockchain) GetGoverningTokenBalance(acc util.Uint160) (*big.Int, uint32) {
|
|
return bc.contracts.NEO.BalanceOf(bc.dao, acc)
|
|
}
|
|
|
|
// GetNotaryBalance returns Notary deposit amount for the specified account.
|
|
func (bc *Blockchain) GetNotaryBalance(acc util.Uint160) *big.Int {
|
|
return bc.contracts.Notary.BalanceOf(bc.dao, acc)
|
|
}
|
|
|
|
// GetNotaryContractScriptHash returns Notary native contract hash.
|
|
func (bc *Blockchain) GetNotaryContractScriptHash() util.Uint160 {
|
|
if bc.P2PSigExtensionsEnabled() {
|
|
return bc.contracts.Notary.Hash
|
|
}
|
|
return util.Uint160{}
|
|
}
|
|
|
|
// GetNotaryDepositExpiration returns Notary deposit expiration height for the specified account.
|
|
func (bc *Blockchain) GetNotaryDepositExpiration(acc util.Uint160) uint32 {
|
|
return bc.contracts.Notary.ExpirationOf(bc.dao, acc)
|
|
}
|
|
|
|
// LastBatch returns last persisted storage batch.
|
|
func (bc *Blockchain) LastBatch() *storage.MemBatch {
|
|
return bc.lastBatch
|
|
}
|
|
|
|
// persist flushes current in-memory Store contents to the persistent storage.
|
|
func (bc *Blockchain) persist() (time.Duration, error) {
|
|
var (
|
|
start = time.Now()
|
|
duration time.Duration
|
|
persisted int
|
|
err error
|
|
)
|
|
|
|
persisted, err = bc.dao.Persist()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if persisted > 0 {
|
|
bHeight, err := bc.persistent.GetCurrentBlockHeight()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
oldHeight := atomic.SwapUint32(&bc.persistedHeight, bHeight)
|
|
diff := bHeight - oldHeight
|
|
|
|
storedHeaderHeight, _, err := bc.persistent.GetCurrentHeaderHeight()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
duration = time.Since(start)
|
|
bc.log.Info("persisted to disk",
|
|
zap.Uint32("blocks", diff),
|
|
zap.Int("keys", persisted),
|
|
zap.Uint32("headerHeight", storedHeaderHeight),
|
|
zap.Uint32("blockHeight", bHeight),
|
|
zap.Duration("took", duration))
|
|
|
|
// update monitoring metrics.
|
|
updatePersistedHeightMetric(bHeight)
|
|
}
|
|
|
|
return duration, nil
|
|
}
|
|
|
|
// GetTransaction returns a TX and its height by the given hash. The height is MaxUint32 if tx is in the mempool.
|
|
func (bc *Blockchain) GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error) {
|
|
if tx, ok := bc.memPool.TryGetValue(hash); ok {
|
|
return tx, math.MaxUint32, nil // the height is not actually defined for memPool transaction.
|
|
}
|
|
return bc.dao.GetTransaction(hash)
|
|
}
|
|
|
|
// GetAppExecResults returns application execution results with the specified trigger by the given
|
|
// tx hash or block hash.
|
|
func (bc *Blockchain) GetAppExecResults(hash util.Uint256, trig trigger.Type) ([]state.AppExecResult, error) {
|
|
return bc.dao.GetAppExecResults(hash, trig)
|
|
}
|
|
|
|
// GetStorageItem returns an item from storage.
|
|
func (bc *Blockchain) GetStorageItem(id int32, key []byte) state.StorageItem {
|
|
return bc.dao.GetStorageItem(id, key)
|
|
}
|
|
|
|
// GetStorageItems returns all storage items for a given contract id.
|
|
func (bc *Blockchain) GetStorageItems(id int32) (map[string]state.StorageItem, error) {
|
|
return bc.dao.GetStorageItems(id)
|
|
}
|
|
|
|
// GetBlock returns a Block by the given hash.
|
|
func (bc *Blockchain) GetBlock(hash util.Uint256) (*block.Block, error) {
|
|
topBlock := bc.topBlock.Load()
|
|
if topBlock != nil {
|
|
tb := topBlock.(*block.Block)
|
|
if tb.Hash().Equals(hash) {
|
|
return tb, nil
|
|
}
|
|
}
|
|
|
|
block, err := bc.dao.GetBlock(hash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !block.MerkleRoot.Equals(util.Uint256{}) && len(block.Transactions) == 0 {
|
|
return nil, errors.New("only header is found")
|
|
}
|
|
for _, tx := range block.Transactions {
|
|
stx, _, err := bc.dao.GetTransaction(tx.Hash())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
*tx = *stx
|
|
}
|
|
return block, nil
|
|
}
|
|
|
|
// GetHeader returns data block header identified with the given hash value.
|
|
func (bc *Blockchain) GetHeader(hash util.Uint256) (*block.Header, error) {
|
|
topBlock := bc.topBlock.Load()
|
|
if topBlock != nil {
|
|
tb := topBlock.(*block.Block)
|
|
if tb.Hash().Equals(hash) {
|
|
return &tb.Header, nil
|
|
}
|
|
}
|
|
block, err := bc.dao.GetBlock(hash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &block.Header, nil
|
|
}
|
|
|
|
// HasTransaction returns true if the blockchain contains he given
|
|
// transaction hash.
|
|
func (bc *Blockchain) HasTransaction(hash util.Uint256) bool {
|
|
if bc.memPool.ContainsKey(hash) {
|
|
return true
|
|
}
|
|
return bc.dao.HasTransaction(hash) == dao.ErrAlreadyExists
|
|
}
|
|
|
|
// HasBlock returns true if the blockchain contains the given
|
|
// block hash.
|
|
func (bc *Blockchain) HasBlock(hash util.Uint256) bool {
|
|
if header, err := bc.GetHeader(hash); err == nil {
|
|
return header.Index <= bc.BlockHeight()
|
|
}
|
|
return false
|
|
}
|
|
|
|
// CurrentBlockHash returns the highest processed block hash.
|
|
func (bc *Blockchain) CurrentBlockHash() util.Uint256 {
|
|
topBlock := bc.topBlock.Load()
|
|
if topBlock != nil {
|
|
tb := topBlock.(*block.Block)
|
|
return tb.Hash()
|
|
}
|
|
return bc.GetHeaderHash(int(bc.BlockHeight()))
|
|
}
|
|
|
|
// CurrentHeaderHash returns the hash of the latest known header.
|
|
func (bc *Blockchain) CurrentHeaderHash() util.Uint256 {
|
|
bc.headerHashesLock.RLock()
|
|
hash := bc.headerHashes[len(bc.headerHashes)-1]
|
|
bc.headerHashesLock.RUnlock()
|
|
return hash
|
|
}
|
|
|
|
// GetHeaderHash returns hash of the header/block with specified index, if
|
|
// Blockchain doesn't have a hash for this height, zero Uint256 value is returned.
|
|
func (bc *Blockchain) GetHeaderHash(i int) util.Uint256 {
|
|
bc.headerHashesLock.RLock()
|
|
defer bc.headerHashesLock.RUnlock()
|
|
|
|
hashesLen := len(bc.headerHashes)
|
|
if hashesLen <= i {
|
|
return util.Uint256{}
|
|
}
|
|
return bc.headerHashes[i]
|
|
}
|
|
|
|
// BlockHeight returns the height/index of the highest block.
|
|
func (bc *Blockchain) BlockHeight() uint32 {
|
|
return atomic.LoadUint32(&bc.blockHeight)
|
|
}
|
|
|
|
// HeaderHeight returns the index/height of the highest header.
|
|
func (bc *Blockchain) HeaderHeight() uint32 {
|
|
bc.headerHashesLock.RLock()
|
|
n := len(bc.headerHashes)
|
|
bc.headerHashesLock.RUnlock()
|
|
return uint32(n - 1)
|
|
}
|
|
|
|
// GetContractState returns contract by its script hash.
|
|
func (bc *Blockchain) GetContractState(hash util.Uint160) *state.Contract {
|
|
contract, err := bc.contracts.Management.GetContract(bc.dao, hash)
|
|
if contract == nil && err != storage.ErrKeyNotFound {
|
|
bc.log.Warn("failed to get contract state", zap.Error(err))
|
|
}
|
|
return contract
|
|
}
|
|
|
|
// GetContractScriptHash returns contract script hash by its ID.
|
|
func (bc *Blockchain) GetContractScriptHash(id int32) (util.Uint160, error) {
|
|
return bc.dao.GetContractScriptHash(id)
|
|
}
|
|
|
|
// GetNativeContractScriptHash returns native contract script hash by its name.
|
|
func (bc *Blockchain) GetNativeContractScriptHash(name string) (util.Uint160, error) {
|
|
c := bc.contracts.ByName(name)
|
|
if c != nil {
|
|
return c.Metadata().Hash, nil
|
|
}
|
|
return util.Uint160{}, errors.New("Unknown native contract")
|
|
}
|
|
|
|
// GetNatives returns list of native contracts.
|
|
func (bc *Blockchain) GetNatives() []state.NativeContract {
|
|
res := make([]state.NativeContract, 0, len(bc.contracts.Contracts))
|
|
for _, c := range bc.contracts.Contracts {
|
|
res = append(res, c.Metadata().NativeContract)
|
|
}
|
|
return res
|
|
}
|
|
|
|
// GetConfig returns the config stored in the blockchain.
|
|
func (bc *Blockchain) GetConfig() config.ProtocolConfiguration {
|
|
return bc.config
|
|
}
|
|
|
|
// SubscribeForBlocks adds given channel to new block event broadcasting, so when
|
|
// there is a new block added to the chain you'll receive it via this channel.
|
|
// Make sure it's read from regularly as not reading these events might affect
|
|
// other Blockchain functions.
|
|
func (bc *Blockchain) SubscribeForBlocks(ch chan<- *block.Block) {
|
|
bc.subCh <- ch
|
|
}
|
|
|
|
// SubscribeForTransactions adds given channel to new transaction event
|
|
// broadcasting, so when there is a new transaction added to the chain (in a
|
|
// block) you'll receive it via this channel. Make sure it's read from regularly
|
|
// as not reading these events might affect other Blockchain functions.
|
|
func (bc *Blockchain) SubscribeForTransactions(ch chan<- *transaction.Transaction) {
|
|
bc.subCh <- ch
|
|
}
|
|
|
|
// SubscribeForNotifications adds given channel to new notifications event
|
|
// broadcasting, so when an in-block transaction execution generates a
|
|
// notification you'll receive it via this channel. Only notifications from
|
|
// successful transactions are broadcasted, if you're interested in failed
|
|
// transactions use SubscribeForExecutions instead. Make sure this channel is
|
|
// read from regularly as not reading these events might affect other Blockchain
|
|
// functions.
|
|
func (bc *Blockchain) SubscribeForNotifications(ch chan<- *state.NotificationEvent) {
|
|
bc.subCh <- ch
|
|
}
|
|
|
|
// SubscribeForExecutions adds given channel to new transaction execution event
|
|
// broadcasting, so when an in-block transaction execution happens you'll receive
|
|
// the result of it via this channel. Make sure it's read from regularly as not
|
|
// reading these events might affect other Blockchain functions.
|
|
func (bc *Blockchain) SubscribeForExecutions(ch chan<- *state.AppExecResult) {
|
|
bc.subCh <- ch
|
|
}
|
|
|
|
// UnsubscribeFromBlocks unsubscribes given channel from new block notifications,
|
|
// you can close it afterwards. Passing non-subscribed channel is a no-op.
|
|
func (bc *Blockchain) UnsubscribeFromBlocks(ch chan<- *block.Block) {
|
|
bc.unsubCh <- ch
|
|
}
|
|
|
|
// UnsubscribeFromTransactions unsubscribes given channel from new transaction
|
|
// notifications, you can close it afterwards. Passing non-subscribed channel is
|
|
// a no-op.
|
|
func (bc *Blockchain) UnsubscribeFromTransactions(ch chan<- *transaction.Transaction) {
|
|
bc.unsubCh <- ch
|
|
}
|
|
|
|
// UnsubscribeFromNotifications unsubscribes given channel from new
|
|
// execution-generated notifications, you can close it afterwards. Passing
|
|
// non-subscribed channel is a no-op.
|
|
func (bc *Blockchain) UnsubscribeFromNotifications(ch chan<- *state.NotificationEvent) {
|
|
bc.unsubCh <- ch
|
|
}
|
|
|
|
// UnsubscribeFromExecutions unsubscribes given channel from new execution
|
|
// notifications, you can close it afterwards. Passing non-subscribed channel is
|
|
// a no-op.
|
|
func (bc *Blockchain) UnsubscribeFromExecutions(ch chan<- *state.AppExecResult) {
|
|
bc.unsubCh <- ch
|
|
}
|
|
|
|
// CalculateClaimable calculates the amount of GAS generated by owning specified
|
|
// amount of NEO between specified blocks.
|
|
func (bc *Blockchain) CalculateClaimable(acc util.Uint160, endHeight uint32) (*big.Int, error) {
|
|
return bc.contracts.NEO.CalculateBonus(bc.dao, acc, endHeight)
|
|
}
|
|
|
|
// FeePerByte returns transaction network fee per byte.
|
|
func (bc *Blockchain) FeePerByte() int64 {
|
|
return bc.contracts.Policy.GetFeePerByteInternal(bc.dao)
|
|
}
|
|
|
|
// GetMemPool returns the memory pool of the blockchain.
|
|
func (bc *Blockchain) GetMemPool() *mempool.Pool {
|
|
return bc.memPool
|
|
}
|
|
|
|
// ApplyPolicyToTxSet applies configured policies to given transaction set. It
|
|
// expects slice to be ordered by fee and returns a subslice of it.
|
|
func (bc *Blockchain) ApplyPolicyToTxSet(txes []*transaction.Transaction) []*transaction.Transaction {
|
|
maxTx := bc.config.MaxTransactionsPerBlock
|
|
if maxTx != 0 && len(txes) > int(maxTx) {
|
|
txes = txes[:maxTx]
|
|
}
|
|
maxBlockSize := bc.config.MaxBlockSize
|
|
maxBlockSysFee := bc.config.MaxBlockSystemFee
|
|
defaultWitness := bc.defaultBlockWitness.Load()
|
|
if defaultWitness == nil {
|
|
m := smartcontract.GetDefaultHonestNodeCount(bc.config.ValidatorsCount)
|
|
verification, _ := smartcontract.CreateDefaultMultiSigRedeemScript(bc.contracts.NEO.GetNextBlockValidatorsInternal())
|
|
defaultWitness = transaction.Witness{
|
|
InvocationScript: make([]byte, 66*m),
|
|
VerificationScript: verification,
|
|
}
|
|
bc.defaultBlockWitness.Store(defaultWitness)
|
|
}
|
|
var (
|
|
b = &block.Block{Header: block.Header{Script: defaultWitness.(transaction.Witness)}}
|
|
blockSize = uint32(b.GetExpectedBlockSizeWithoutTransactions(len(txes)))
|
|
blockSysFee int64
|
|
)
|
|
for i, tx := range txes {
|
|
blockSize += uint32(tx.Size())
|
|
blockSysFee += tx.SystemFee
|
|
if blockSize > maxBlockSize || blockSysFee > maxBlockSysFee {
|
|
txes = txes[:i]
|
|
break
|
|
}
|
|
}
|
|
return txes
|
|
}
|
|
|
|
// Various errors that could be returns upon header verification.
|
|
var (
|
|
ErrHdrHashMismatch = errors.New("previous header hash doesn't match")
|
|
ErrHdrIndexMismatch = errors.New("previous header index doesn't match")
|
|
ErrHdrInvalidTimestamp = errors.New("block is not newer than the previous one")
|
|
ErrHdrStateRootSetting = errors.New("state root setting mismatch")
|
|
ErrHdrInvalidStateRoot = errors.New("state root for previous block is invalid")
|
|
)
|
|
|
|
func (bc *Blockchain) verifyHeader(currHeader, prevHeader *block.Header) error {
|
|
if bc.config.StateRootInHeader {
|
|
if bc.stateRoot.CurrentLocalHeight() == prevHeader.Index {
|
|
if sr := bc.stateRoot.CurrentLocalStateRoot(); currHeader.PrevStateRoot != sr {
|
|
return fmt.Errorf("%w: %s != %s",
|
|
ErrHdrInvalidStateRoot, currHeader.PrevStateRoot.StringLE(), sr.StringLE())
|
|
}
|
|
}
|
|
}
|
|
if prevHeader.Hash() != currHeader.PrevHash {
|
|
return ErrHdrHashMismatch
|
|
}
|
|
if prevHeader.Index+1 != currHeader.Index {
|
|
return ErrHdrIndexMismatch
|
|
}
|
|
if prevHeader.Timestamp >= currHeader.Timestamp {
|
|
return ErrHdrInvalidTimestamp
|
|
}
|
|
return bc.verifyHeaderWitnesses(currHeader, prevHeader)
|
|
}
|
|
|
|
// Various errors that could be returned upon verification.
|
|
var (
|
|
ErrTxExpired = errors.New("transaction has expired")
|
|
ErrInsufficientFunds = errors.New("insufficient funds")
|
|
ErrTxSmallNetworkFee = errors.New("too small network fee")
|
|
ErrTxTooBig = errors.New("too big transaction")
|
|
ErrMemPoolConflict = errors.New("invalid transaction due to conflicts with the memory pool")
|
|
ErrInvalidScript = errors.New("invalid script")
|
|
ErrInvalidAttribute = errors.New("invalid attribute")
|
|
)
|
|
|
|
// verifyAndPoolTx verifies whether a transaction is bonafide or not and tries
|
|
// to add it to the mempool given.
|
|
func (bc *Blockchain) verifyAndPoolTx(t *transaction.Transaction, pool *mempool.Pool, feer mempool.Feer, data ...interface{}) error {
|
|
// This code can technically be moved out of here, because it doesn't
|
|
// really require a chain lock.
|
|
err := vm.IsScriptCorrect(t.Script, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("%w: %v", ErrInvalidScript, err)
|
|
}
|
|
|
|
height := bc.BlockHeight()
|
|
isPartialTx := data != nil
|
|
if t.ValidUntilBlock <= height || !isPartialTx && t.ValidUntilBlock > height+bc.config.MaxValidUntilBlockIncrement {
|
|
return fmt.Errorf("%w: ValidUntilBlock = %d, current height = %d", ErrTxExpired, t.ValidUntilBlock, height)
|
|
}
|
|
// Policying.
|
|
if err := bc.contracts.Policy.CheckPolicy(bc.dao, t); err != nil {
|
|
// Only one %w can be used.
|
|
return fmt.Errorf("%w: %v", ErrPolicy, err)
|
|
}
|
|
size := t.Size()
|
|
if size > transaction.MaxTransactionSize {
|
|
return fmt.Errorf("%w: (%d > MaxTransactionSize %d)", ErrTxTooBig, size, transaction.MaxTransactionSize)
|
|
}
|
|
needNetworkFee := int64(size) * bc.FeePerByte()
|
|
if bc.P2PSigExtensionsEnabled() {
|
|
attrs := t.GetAttributes(transaction.NotaryAssistedT)
|
|
if len(attrs) != 0 {
|
|
na := attrs[0].Value.(*transaction.NotaryAssisted)
|
|
needNetworkFee += (int64(na.NKeys) + 1) * transaction.NotaryServiceFeePerKey
|
|
}
|
|
}
|
|
netFee := t.NetworkFee - needNetworkFee
|
|
if netFee < 0 {
|
|
return fmt.Errorf("%w: net fee is %v, need %v", ErrTxSmallNetworkFee, t.NetworkFee, needNetworkFee)
|
|
}
|
|
// check that current tx wasn't included in the conflicts attributes of some other transaction which is already in the chain
|
|
if err := bc.dao.HasTransaction(t.Hash()); err != nil {
|
|
switch {
|
|
case errors.Is(err, dao.ErrAlreadyExists):
|
|
return fmt.Errorf("blockchain: %w", ErrAlreadyExists)
|
|
case errors.Is(err, dao.ErrHasConflicts):
|
|
return fmt.Errorf("blockchain: %w", ErrHasConflicts)
|
|
default:
|
|
return err
|
|
}
|
|
}
|
|
err = bc.verifyTxWitnesses(t, nil, isPartialTx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := bc.verifyTxAttributes(t, isPartialTx); err != nil {
|
|
return err
|
|
}
|
|
err = pool.Add(t, feer, data...)
|
|
if err != nil {
|
|
switch {
|
|
case errors.Is(err, mempool.ErrConflict):
|
|
return ErrMemPoolConflict
|
|
case errors.Is(err, mempool.ErrDup):
|
|
return fmt.Errorf("mempool: %w", ErrAlreadyExists)
|
|
case errors.Is(err, mempool.ErrInsufficientFunds):
|
|
return ErrInsufficientFunds
|
|
case errors.Is(err, mempool.ErrOOM):
|
|
return ErrOOM
|
|
case errors.Is(err, mempool.ErrConflictsAttribute):
|
|
return fmt.Errorf("mempool: %w: %s", ErrHasConflicts, err)
|
|
default:
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (bc *Blockchain) verifyTxAttributes(tx *transaction.Transaction, isPartialTx bool) error {
|
|
for i := range tx.Attributes {
|
|
switch attrType := tx.Attributes[i].Type; attrType {
|
|
case transaction.HighPriority:
|
|
h := bc.contracts.NEO.GetCommitteeAddress()
|
|
if !tx.HasSigner(h) {
|
|
return fmt.Errorf("%w: high priority tx is not signed by committee", ErrInvalidAttribute)
|
|
}
|
|
case transaction.OracleResponseT:
|
|
h, err := bc.contracts.Oracle.GetScriptHash(bc.dao)
|
|
if err != nil || h.Equals(util.Uint160{}) {
|
|
return fmt.Errorf("%w: %v", ErrInvalidAttribute, err)
|
|
}
|
|
hasOracle := false
|
|
for i := range tx.Signers {
|
|
if tx.Signers[i].Scopes != transaction.None {
|
|
return fmt.Errorf("%w: oracle tx has invalid signer scope", ErrInvalidAttribute)
|
|
}
|
|
if tx.Signers[i].Account.Equals(h) {
|
|
hasOracle = true
|
|
}
|
|
}
|
|
if !hasOracle {
|
|
return fmt.Errorf("%w: oracle tx is not signed by oracle nodes", ErrInvalidAttribute)
|
|
}
|
|
if !bytes.Equal(tx.Script, bc.contracts.Oracle.GetOracleResponseScript()) {
|
|
return fmt.Errorf("%w: oracle tx has invalid script", ErrInvalidAttribute)
|
|
}
|
|
resp := tx.Attributes[i].Value.(*transaction.OracleResponse)
|
|
req, err := bc.contracts.Oracle.GetRequestInternal(bc.dao, resp.ID)
|
|
if err != nil {
|
|
return fmt.Errorf("%w: oracle tx points to invalid request: %v", ErrInvalidAttribute, err)
|
|
}
|
|
if uint64(tx.NetworkFee+tx.SystemFee) < req.GasForResponse {
|
|
return fmt.Errorf("%w: oracle tx has insufficient gas", ErrInvalidAttribute)
|
|
}
|
|
case transaction.NotValidBeforeT:
|
|
if !bc.config.P2PSigExtensions {
|
|
return fmt.Errorf("%w: NotValidBefore attribute was found, but P2PSigExtensions are disabled", ErrInvalidAttribute)
|
|
}
|
|
nvb := tx.Attributes[i].Value.(*transaction.NotValidBefore).Height
|
|
if isPartialTx {
|
|
maxNVBDelta := bc.contracts.Notary.GetMaxNotValidBeforeDelta(bc.dao)
|
|
if bc.BlockHeight()+maxNVBDelta < nvb {
|
|
return fmt.Errorf("%w: partially-filled transaction should become valid not less then %d blocks after current chain's height %d", ErrInvalidAttribute, maxNVBDelta, bc.BlockHeight())
|
|
}
|
|
if nvb+maxNVBDelta < tx.ValidUntilBlock {
|
|
return fmt.Errorf("%w: partially-filled transaction should be valid during less than %d blocks", ErrInvalidAttribute, maxNVBDelta)
|
|
}
|
|
} else {
|
|
if height := bc.BlockHeight(); height < nvb {
|
|
return fmt.Errorf("%w: transaction is not yet valid: NotValidBefore = %d, current height = %d", ErrInvalidAttribute, nvb, height)
|
|
}
|
|
}
|
|
case transaction.ConflictsT:
|
|
if !bc.config.P2PSigExtensions {
|
|
return fmt.Errorf("%w: Conflicts attribute was found, but P2PSigExtensions are disabled", ErrInvalidAttribute)
|
|
}
|
|
conflicts := tx.Attributes[i].Value.(*transaction.Conflicts)
|
|
if err := bc.dao.HasTransaction(conflicts.Hash); errors.Is(err, dao.ErrAlreadyExists) {
|
|
return fmt.Errorf("%w: conflicting transaction %s is already on chain", ErrInvalidAttribute, conflicts.Hash.StringLE())
|
|
}
|
|
case transaction.NotaryAssistedT:
|
|
if !bc.config.P2PSigExtensions {
|
|
return fmt.Errorf("%w: NotaryAssisted attribute was found, but P2PSigExtensions are disabled", ErrInvalidAttribute)
|
|
}
|
|
if !tx.HasSigner(bc.contracts.Notary.Hash) {
|
|
return fmt.Errorf("%w: NotaryAssisted attribute was found, but transaction is not signed by the Notary native contract", ErrInvalidAttribute)
|
|
}
|
|
default:
|
|
if !bc.config.ReservedAttributes && attrType >= transaction.ReservedLowerBound && attrType <= transaction.ReservedUpperBound {
|
|
return fmt.Errorf("%w: attribute of reserved type was found, but ReservedAttributes are disabled", ErrInvalidAttribute)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// IsTxStillRelevant is a callback for mempool transaction filtering after the
|
|
// new block addition. It returns false for transactions added by the new block
|
|
// (passed via txpool) and does witness reverification for non-standard
|
|
// contracts. It operates under the assumption that full transaction verification
|
|
// was already done so we don't need to check basic things like size, input/output
|
|
// correctness, presence in blocks before the new one, etc.
|
|
func (bc *Blockchain) IsTxStillRelevant(t *transaction.Transaction, txpool *mempool.Pool, isPartialTx bool) bool {
|
|
var recheckWitness bool
|
|
var curheight = bc.BlockHeight()
|
|
|
|
if t.ValidUntilBlock <= curheight {
|
|
return false
|
|
}
|
|
if txpool == nil {
|
|
if bc.dao.HasTransaction(t.Hash()) != nil {
|
|
return false
|
|
}
|
|
} else if txpool.HasConflicts(t, bc) {
|
|
return false
|
|
}
|
|
if err := bc.verifyTxAttributes(t, isPartialTx); err != nil {
|
|
return false
|
|
}
|
|
for i := range t.Scripts {
|
|
if !vm.IsStandardContract(t.Scripts[i].VerificationScript) {
|
|
recheckWitness = true
|
|
break
|
|
}
|
|
}
|
|
if recheckWitness {
|
|
return bc.verifyTxWitnesses(t, nil, isPartialTx) == nil
|
|
}
|
|
return true
|
|
}
|
|
|
|
// VerifyTx verifies whether transaction is bonafide or not relative to the
|
|
// current blockchain state. Note that this verification is completely isolated
|
|
// from the main node's mempool.
|
|
func (bc *Blockchain) VerifyTx(t *transaction.Transaction) error {
|
|
var mp = mempool.New(1, 0, false)
|
|
bc.lock.RLock()
|
|
defer bc.lock.RUnlock()
|
|
return bc.verifyAndPoolTx(t, mp, bc)
|
|
}
|
|
|
|
// PoolTx verifies and tries to add given transaction into the mempool. If not
|
|
// given, the default mempool is used. Passing multiple pools is not supported.
|
|
func (bc *Blockchain) PoolTx(t *transaction.Transaction, pools ...*mempool.Pool) error {
|
|
var pool = bc.memPool
|
|
|
|
bc.lock.RLock()
|
|
defer bc.lock.RUnlock()
|
|
// Programmer error.
|
|
if len(pools) > 1 {
|
|
panic("too many pools given")
|
|
}
|
|
if len(pools) == 1 {
|
|
pool = pools[0]
|
|
}
|
|
return bc.verifyAndPoolTx(t, pool, bc)
|
|
}
|
|
|
|
// PoolTxWithData verifies and tries to add given transaction with additional data into the mempool.
|
|
func (bc *Blockchain) PoolTxWithData(t *transaction.Transaction, data interface{}, mp *mempool.Pool, feer mempool.Feer, verificationFunction func(bc blockchainer.Blockchainer, tx *transaction.Transaction, data interface{}) error) error {
|
|
bc.lock.RLock()
|
|
defer bc.lock.RUnlock()
|
|
|
|
if verificationFunction != nil {
|
|
err := verificationFunction(bc, t, data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return bc.verifyAndPoolTx(t, mp, feer, data)
|
|
}
|
|
|
|
//GetStandByValidators returns validators from the configuration.
|
|
func (bc *Blockchain) GetStandByValidators() keys.PublicKeys {
|
|
return bc.sbCommittee[:bc.config.ValidatorsCount].Copy()
|
|
}
|
|
|
|
// GetStandByCommittee returns standby committee from the configuration.
|
|
func (bc *Blockchain) GetStandByCommittee() keys.PublicKeys {
|
|
return bc.sbCommittee.Copy()
|
|
}
|
|
|
|
// GetCommittee returns the sorted list of public keys of nodes in committee.
|
|
func (bc *Blockchain) GetCommittee() (keys.PublicKeys, error) {
|
|
pubs := bc.contracts.NEO.GetCommitteeMembers()
|
|
sort.Sort(pubs)
|
|
return pubs, nil
|
|
}
|
|
|
|
// GetValidators returns current validators.
|
|
func (bc *Blockchain) GetValidators() ([]*keys.PublicKey, error) {
|
|
return bc.contracts.NEO.ComputeNextBlockValidators(bc, bc.dao)
|
|
}
|
|
|
|
// GetNextBlockValidators returns next block validators.
|
|
func (bc *Blockchain) GetNextBlockValidators() ([]*keys.PublicKey, error) {
|
|
return bc.contracts.NEO.GetNextBlockValidatorsInternal(), nil
|
|
}
|
|
|
|
// GetEnrollments returns all registered validators.
|
|
func (bc *Blockchain) GetEnrollments() ([]state.Validator, error) {
|
|
return bc.contracts.NEO.GetCandidates(bc.dao)
|
|
}
|
|
|
|
// GetTestVM returns a VM and a Store setup for a test run of some sort of code.
|
|
func (bc *Blockchain) GetTestVM(t trigger.Type, tx *transaction.Transaction, b *block.Block) *vm.VM {
|
|
d := bc.dao.GetWrapped().(*dao.Simple)
|
|
systemInterop := bc.newInteropContext(t, d, b, tx)
|
|
vm := systemInterop.SpawnVM()
|
|
vm.SetPriceGetter(systemInterop.GetPrice)
|
|
vm.LoadToken = contract.LoadToken(systemInterop)
|
|
return vm
|
|
}
|
|
|
|
// Various witness verification errors.
|
|
var (
|
|
ErrWitnessHashMismatch = errors.New("witness hash mismatch")
|
|
ErrNativeContractWitness = errors.New("native contract witness must have empty verification script")
|
|
ErrVerificationFailed = errors.New("signature check failed")
|
|
ErrInvalidInvocation = errors.New("invalid invocation script")
|
|
ErrInvalidSignature = fmt.Errorf("%w: invalid signature", ErrVerificationFailed)
|
|
ErrInvalidVerification = errors.New("invalid verification script")
|
|
ErrUnknownVerificationContract = errors.New("unknown verification contract")
|
|
ErrInvalidVerificationContract = errors.New("verification contract is missing `verify` method")
|
|
)
|
|
|
|
// InitVerificationVM initializes VM for witness check.
|
|
func (bc *Blockchain) InitVerificationVM(v *vm.VM, getContract func(util.Uint160) (*state.Contract, error), hash util.Uint160, witness *transaction.Witness) error {
|
|
if len(witness.VerificationScript) != 0 {
|
|
if witness.ScriptHash() != hash {
|
|
return ErrWitnessHashMismatch
|
|
}
|
|
if bc.contracts.ByHash(hash) != nil {
|
|
return ErrNativeContractWitness
|
|
}
|
|
err := vm.IsScriptCorrect(witness.VerificationScript, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("%w: %v", ErrInvalidVerification, err)
|
|
}
|
|
v.LoadScriptWithHash(witness.VerificationScript, hash, callflag.ReadOnly)
|
|
} else {
|
|
cs, err := getContract(hash)
|
|
if err != nil {
|
|
return ErrUnknownVerificationContract
|
|
}
|
|
md := cs.Manifest.ABI.GetMethod(manifest.MethodVerify, -1)
|
|
if md == nil || md.ReturnType != smartcontract.BoolType {
|
|
return ErrInvalidVerificationContract
|
|
}
|
|
initMD := cs.Manifest.ABI.GetMethod(manifest.MethodInit, 0)
|
|
v.LoadScriptWithHash(cs.NEF.Script, hash, callflag.ReadOnly)
|
|
v.Context().NEF = &cs.NEF
|
|
v.Jump(v.Context(), md.Offset)
|
|
|
|
if initMD != nil {
|
|
v.Call(v.Context(), initMD.Offset)
|
|
}
|
|
}
|
|
if len(witness.InvocationScript) != 0 {
|
|
err := vm.IsScriptCorrect(witness.InvocationScript, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("%w: %v", ErrInvalidInvocation, err)
|
|
}
|
|
v.LoadScript(witness.InvocationScript)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// VerifyWitness checks that w is a correct witness for c signed by h.
|
|
func (bc *Blockchain) VerifyWitness(h util.Uint160, c hash.Hashable, w *transaction.Witness, gas int64) error {
|
|
ic := bc.newInteropContext(trigger.Verification, bc.dao, nil, nil)
|
|
ic.Container = c
|
|
_, err := bc.verifyHashAgainstScript(h, w, ic, gas)
|
|
return err
|
|
}
|
|
|
|
// verifyHashAgainstScript verifies given hash against the given witness and returns the amount of GAS consumed.
|
|
func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transaction.Witness, interopCtx *interop.Context, gas int64) (int64, error) {
|
|
gasPolicy := bc.contracts.Policy.GetMaxVerificationGas(interopCtx.DAO)
|
|
if gas > gasPolicy {
|
|
gas = gasPolicy
|
|
}
|
|
|
|
vm := interopCtx.SpawnVM()
|
|
vm.SetPriceGetter(interopCtx.GetPrice)
|
|
vm.LoadToken = contract.LoadToken(interopCtx)
|
|
vm.GasLimit = gas
|
|
if err := bc.InitVerificationVM(vm, interopCtx.GetContract, hash, witness); err != nil {
|
|
return 0, err
|
|
}
|
|
err := vm.Run()
|
|
if vm.HasFailed() {
|
|
return 0, fmt.Errorf("%w: vm execution has failed: %v", ErrVerificationFailed, err)
|
|
}
|
|
estack := vm.Estack()
|
|
if estack.Len() > 0 {
|
|
resEl := estack.Pop()
|
|
res, err := resEl.Item().TryBool()
|
|
if err != nil {
|
|
return 0, fmt.Errorf("%w: invalid return value", ErrVerificationFailed)
|
|
}
|
|
if vm.Estack().Len() != 0 {
|
|
return 0, fmt.Errorf("%w: expected exactly one returned value", ErrVerificationFailed)
|
|
}
|
|
if !res {
|
|
return vm.GasConsumed(), ErrInvalidSignature
|
|
}
|
|
} else {
|
|
return 0, fmt.Errorf("%w: no result returned from the script", ErrVerificationFailed)
|
|
}
|
|
return vm.GasConsumed(), nil
|
|
}
|
|
|
|
// verifyTxWitnesses verifies the scripts (witnesses) that come with a given
|
|
// transaction. It can reorder them by ScriptHash, because that's required to
|
|
// match a slice of script hashes from the Blockchain. Block parameter
|
|
// is used for easy interop access and can be omitted for transactions that are
|
|
// not yet added into any block.
|
|
// Golang implementation of VerifyWitnesses method in C# (https://github.com/neo-project/neo/blob/master/neo/SmartContract/Helper.cs#L87).
|
|
func (bc *Blockchain) verifyTxWitnesses(t *transaction.Transaction, block *block.Block, isPartialTx bool) error {
|
|
interopCtx := bc.newInteropContext(trigger.Verification, bc.dao, block, t)
|
|
gasLimit := t.NetworkFee - int64(t.Size())*bc.FeePerByte()
|
|
if bc.P2PSigExtensionsEnabled() {
|
|
attrs := t.GetAttributes(transaction.NotaryAssistedT)
|
|
if len(attrs) != 0 {
|
|
na := attrs[0].Value.(*transaction.NotaryAssisted)
|
|
gasLimit -= (int64(na.NKeys) + 1) * transaction.NotaryServiceFeePerKey
|
|
}
|
|
}
|
|
for i := range t.Signers {
|
|
gasConsumed, err := bc.verifyHashAgainstScript(t.Signers[i].Account, &t.Scripts[i], interopCtx, gasLimit)
|
|
if err != nil &&
|
|
!(i == 0 && isPartialTx && errors.Is(err, ErrInvalidSignature)) { // it's OK for partially-filled transaction with dummy first witness.
|
|
return fmt.Errorf("witness #%d: %w", i, err)
|
|
}
|
|
gasLimit -= gasConsumed
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// verifyHeaderWitnesses is a block-specific implementation of VerifyWitnesses logic.
|
|
func (bc *Blockchain) verifyHeaderWitnesses(currHeader, prevHeader *block.Header) error {
|
|
var hash util.Uint160
|
|
if prevHeader == nil && currHeader.PrevHash.Equals(util.Uint256{}) {
|
|
hash = currHeader.Script.ScriptHash()
|
|
} else {
|
|
hash = prevHeader.NextConsensus
|
|
}
|
|
return bc.VerifyWitness(hash, currHeader, &currHeader.Script, HeaderVerificationGasLimit)
|
|
}
|
|
|
|
// GoverningTokenHash returns the governing token (NEO) native contract hash.
|
|
func (bc *Blockchain) GoverningTokenHash() util.Uint160 {
|
|
return bc.contracts.NEO.Hash
|
|
}
|
|
|
|
// UtilityTokenHash returns the utility token (GAS) native contract hash.
|
|
func (bc *Blockchain) UtilityTokenHash() util.Uint160 {
|
|
return bc.contracts.GAS.Hash
|
|
}
|
|
|
|
// ManagementContractHash returns management contract's hash.
|
|
func (bc *Blockchain) ManagementContractHash() util.Uint160 {
|
|
return bc.contracts.Management.Hash
|
|
}
|
|
|
|
func hashAndIndexToBytes(h util.Uint256, index uint32) []byte {
|
|
buf := io.NewBufBinWriter()
|
|
buf.WriteBytes(h.BytesLE())
|
|
buf.WriteU32LE(index)
|
|
return buf.Bytes()
|
|
}
|
|
|
|
func (bc *Blockchain) newInteropContext(trigger trigger.Type, d dao.DAO, block *block.Block, tx *transaction.Transaction) *interop.Context {
|
|
ic := interop.NewContext(trigger, bc, d, bc.contracts.Management.GetContract, bc.contracts.Contracts, block, tx, bc.log)
|
|
ic.Functions = systemInterops
|
|
switch {
|
|
case tx != nil:
|
|
ic.Container = tx
|
|
case block != nil:
|
|
ic.Container = block
|
|
}
|
|
ic.InitNonceData()
|
|
return ic
|
|
}
|
|
|
|
// P2PSigExtensionsEnabled defines whether P2P signature extensions are enabled.
|
|
func (bc *Blockchain) P2PSigExtensionsEnabled() bool {
|
|
return bc.config.P2PSigExtensions
|
|
}
|
|
|
|
// RegisterPostBlock appends provided function to the list of functions which should be run after new block
|
|
// is stored.
|
|
func (bc *Blockchain) RegisterPostBlock(f func(blockchainer.Blockchainer, *mempool.Pool, *block.Block)) {
|
|
bc.postBlock = append(bc.postBlock, f)
|
|
}
|
|
|
|
// -- start Policer.
|
|
|
|
// GetPolicer provides access to policy values via Policer interface.
|
|
func (bc *Blockchain) GetPolicer() blockchainer.Policer {
|
|
return bc
|
|
}
|
|
|
|
// GetBaseExecFee return execution price for `NOP`.
|
|
func (bc *Blockchain) GetBaseExecFee() int64 {
|
|
return bc.contracts.Policy.GetExecFeeFactorInternal(bc.dao)
|
|
}
|
|
|
|
// GetMaxVerificationGAS returns maximum verification GAS Policy limit.
|
|
func (bc *Blockchain) GetMaxVerificationGAS() int64 {
|
|
return bc.contracts.Policy.GetMaxVerificationGas(bc.dao)
|
|
}
|
|
|
|
// GetStoragePrice returns current storage price.
|
|
func (bc *Blockchain) GetStoragePrice() int64 {
|
|
if bc.BlockHeight() == 0 {
|
|
return native.DefaultStoragePrice
|
|
}
|
|
return bc.contracts.Policy.GetStoragePriceInternal(bc.dao)
|
|
}
|
|
|
|
// -- end Policer.
|