9673a04009
Problem: with StateRootInHeader setting on only one header of height N+1 can be added to the chain of height N, because we need local stateroot to verify headers (which is calculated for the last stored block N). Thus, adding chunk of headers starting from the current chain's heigh is impossible and (*Blockchain).AddHeaders doesn't have much sense. Solution: verify header.PrevStateRoot only for header N+1. Rest of the headers should be added without PrevStateRoot verification.
1950 lines
64 KiB
Go
1950 lines
64 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/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/bigint"
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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/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 = "0.1.0"
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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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verificationGasLimit = 100000000 // 1 GAS
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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 error = 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.
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dao *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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// 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.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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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),
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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.P2PSigExtensions, cfg.NativeUpdateHistories),
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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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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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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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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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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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// 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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w := io.NewBufBinWriter()
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storedCS.EncodeBinary(w.BinWriter)
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if w.Err != nil {
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return fmt.Errorf("failed to check native %s state against autogenerated one: %w", md.Name, w.Err)
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}
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buff := w.Bytes()
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storedCSBytes := make([]byte, len(buff))
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copy(storedCSBytes, buff)
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w.Reset()
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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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autogenCS.EncodeBinary(w.BinWriter)
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if w.Err != nil {
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return fmt.Errorf("failed to check native %s state against autogenerated one: %w", md.Name, w.Err)
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}
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autogenCSBytes := w.Bytes()
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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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return bc.updateExtensibleWhitelist(bHeight)
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}
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// Run runs chain loop, it needs to be run as goroutine and executing it is
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// critical for correct Blockchain operation.
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func (bc *Blockchain) Run() {
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persistTimer := time.NewTimer(persistInterval)
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defer func() {
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persistTimer.Stop()
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if err := bc.persist(); err != nil {
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bc.log.Warn("failed to persist", zap.Error(err))
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}
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if err := bc.dao.Store.Close(); err != nil {
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bc.log.Warn("failed to close db", zap.Error(err))
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}
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close(bc.runToExitCh)
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}()
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go bc.notificationDispatcher()
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for {
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select {
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case <-bc.stopCh:
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return
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case <-persistTimer.C:
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go func() {
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err := bc.persist()
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if err != nil {
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bc.log.Warn("failed to persist blockchain", zap.Error(err))
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}
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persistTimer.Reset(persistInterval)
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}()
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}
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}
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}
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// notificationDispatcher manages subscription to events and broadcasts new events.
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func (bc *Blockchain) notificationDispatcher() {
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var (
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// These are just sets of subscribers, though modelled as maps
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// for ease of management (not a lot of subscriptions is really
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// expected, but maps are convenient for adding/deleting elements).
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blockFeed = make(map[chan<- *block.Block]bool)
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txFeed = make(map[chan<- *transaction.Transaction]bool)
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notificationFeed = make(map[chan<- *state.NotificationEvent]bool)
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executionFeed = make(map[chan<- *state.AppExecResult]bool)
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)
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for {
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select {
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case <-bc.stopCh:
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return
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case sub := <-bc.subCh:
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switch ch := sub.(type) {
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case chan<- *block.Block:
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blockFeed[ch] = true
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case chan<- *transaction.Transaction:
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txFeed[ch] = true
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case chan<- *state.NotificationEvent:
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notificationFeed[ch] = true
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case chan<- *state.AppExecResult:
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executionFeed[ch] = true
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default:
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panic(fmt.Sprintf("bad subscription: %T", sub))
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}
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case unsub := <-bc.unsubCh:
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switch ch := unsub.(type) {
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case chan<- *block.Block:
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delete(blockFeed, ch)
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case chan<- *transaction.Transaction:
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delete(txFeed, ch)
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case chan<- *state.NotificationEvent:
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delete(notificationFeed, ch)
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case chan<- *state.AppExecResult:
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delete(executionFeed, ch)
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default:
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panic(fmt.Sprintf("bad unsubscription: %T", unsub))
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}
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case event := <-bc.events:
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// We don't want to waste time looping through transactions when there are no
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// subscribers.
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if len(txFeed) != 0 || len(notificationFeed) != 0 || len(executionFeed) != 0 {
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aer := event.appExecResults[0]
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if !aer.Container.Equals(event.block.Hash()) {
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panic("inconsistent application execution results")
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}
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for ch := range executionFeed {
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ch <- aer
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}
|
|
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
|
|
}
|
|
|
|
// 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 {
|
|
cache := dao.NewCached(bc.dao)
|
|
writeBuf := io.NewBufBinWriter()
|
|
appExecResults := make([]*state.AppExecResult, 0, 2+len(block.Transactions))
|
|
if err := cache.StoreAsBlock(block, writeBuf); err != nil {
|
|
return err
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
if err := cache.StoreAsCurrentBlock(block, writeBuf); err != nil {
|
|
return err
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
aer, err := bc.runPersist(bc.contracts.GetPersistScript(), block, cache, trigger.OnPersist)
|
|
if err != nil {
|
|
return fmt.Errorf("onPersist failed: %w", err)
|
|
}
|
|
appExecResults = append(appExecResults, aer)
|
|
err = cache.PutAppExecResult(aer, writeBuf)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store onPersist exec result: %w", err)
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
for _, tx := range block.Transactions {
|
|
if err := cache.StoreAsTransaction(tx, block.Index, writeBuf); err != nil {
|
|
return err
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
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 {
|
|
return fmt.Errorf("failed to persist invocation results: %w", err)
|
|
}
|
|
for j := range systemInterop.Notifications {
|
|
bc.handleNotification(&systemInterop.Notifications[j], cache, block, tx.Hash())
|
|
}
|
|
} 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)
|
|
err = cache.PutAppExecResult(aer, writeBuf)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store tx exec result: %w", err)
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
if bc.config.P2PSigExtensions {
|
|
for _, attr := range tx.GetAttributes(transaction.ConflictsT) {
|
|
hash := attr.Value.(*transaction.Conflicts).Hash
|
|
dummyTx := transaction.NewTrimmedTX(hash)
|
|
dummyTx.Version = transaction.DummyVersion
|
|
if err = cache.StoreAsTransaction(dummyTx, block.Index, writeBuf); err != nil {
|
|
return fmt.Errorf("failed to store conflicting transaction %s for transaction %s: %w", hash.StringLE(), tx.Hash().StringLE(), err)
|
|
}
|
|
writeBuf.Reset()
|
|
}
|
|
}
|
|
}
|
|
|
|
aer, err = bc.runPersist(bc.contracts.GetPostPersistScript(), block, cache, trigger.PostPersist)
|
|
if err != nil {
|
|
return fmt.Errorf("postPersist failed: %w", err)
|
|
}
|
|
appExecResults = append(appExecResults, aer)
|
|
err = cache.AppendAppExecResult(aer, writeBuf)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to store postPersist exec result: %w", err)
|
|
}
|
|
writeBuf.Reset()
|
|
|
|
d := cache.DAO.(*dao.Simple)
|
|
b := d.GetMPTBatch()
|
|
mpt, sr, err := bc.stateRoot.AddMPTBatch(block.Index, b, d.Store)
|
|
if err != nil {
|
|
// 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 {
|
|
return fmt.Errorf("failed to get next header: %w", err)
|
|
}
|
|
if h.PrevStateRoot != sr.Root {
|
|
return fmt.Errorf("local stateroot and next header's PrevStateRoot mismatch: %s vs %s", sr.Root.StringBE(), h.PrevStateRoot.StringBE())
|
|
}
|
|
}
|
|
|
|
if bc.config.SaveStorageBatch {
|
|
bc.lastBatch = cache.DAO.GetBatch()
|
|
}
|
|
if bc.config.RemoveUntraceableBlocks {
|
|
if block.Index > bc.config.MaxTraceableBlocks {
|
|
index := block.Index - bc.config.MaxTraceableBlocks // is at least 1
|
|
err := cache.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()
|
|
}
|
|
}
|
|
// 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)
|
|
}
|
|
|
|
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.Cached, 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)
|
|
}
|
|
for i := range systemInterop.Notifications {
|
|
bc.handleNotification(&systemInterop.Notifications[i], cache, block, block.Hash())
|
|
}
|
|
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.Cached, b *block.Block, h util.Uint256) {
|
|
if note.Name != "Transfer" {
|
|
return
|
|
}
|
|
arr, ok := note.Item.Value().([]stackitem.Item)
|
|
if !ok || len(arr) != 3 {
|
|
return
|
|
}
|
|
var from []byte
|
|
fromValue := arr[0].Value()
|
|
// we don't have `from` set when we are minting tokens
|
|
if fromValue != nil {
|
|
from, ok = fromValue.([]byte)
|
|
if !ok {
|
|
return
|
|
}
|
|
}
|
|
var to []byte
|
|
toValue := arr[1].Value()
|
|
// we don't have `to` set when we are burning tokens
|
|
if toValue != nil {
|
|
to, ok = toValue.([]byte)
|
|
if !ok {
|
|
return
|
|
}
|
|
}
|
|
amount, ok := arr[2].Value().(*big.Int)
|
|
if !ok {
|
|
bs, ok := arr[2].Value().([]byte)
|
|
if !ok {
|
|
return
|
|
}
|
|
if len(bs) > bigint.MaxBytesLen {
|
|
return // Not a proper number.
|
|
}
|
|
amount = bigint.FromBytes(bs)
|
|
}
|
|
bc.processNEP17Transfer(d, h, b, note.ScriptHash, from, to, amount)
|
|
}
|
|
|
|
func parseUint160(addr []byte) util.Uint160 {
|
|
if u, err := util.Uint160DecodeBytesBE(addr); err == nil {
|
|
return u
|
|
}
|
|
return util.Uint160{}
|
|
}
|
|
|
|
func (bc *Blockchain) processNEP17Transfer(cache *dao.Cached, h util.Uint256, b *block.Block, sc util.Uint160, from, to []byte, amount *big.Int) {
|
|
toAddr := parseUint160(to)
|
|
fromAddr := parseUint160(from)
|
|
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: fromAddr,
|
|
To: toAddr,
|
|
Block: b.Index,
|
|
Timestamp: b.Timestamp,
|
|
Tx: h,
|
|
}
|
|
if !fromAddr.Equals(util.Uint160{}) {
|
|
balances, err := cache.GetNEP17Balances(fromAddr)
|
|
if err != nil {
|
|
return
|
|
}
|
|
bs := balances.Trackers[id]
|
|
bs.Balance = *new(big.Int).Sub(&bs.Balance, amount)
|
|
bs.LastUpdatedBlock = b.Index
|
|
balances.Trackers[id] = bs
|
|
transfer.Amount = *new(big.Int).Sub(&transfer.Amount, amount)
|
|
balances.NewBatch, err = cache.AppendNEP17Transfer(fromAddr,
|
|
balances.NextTransferBatch, balances.NewBatch, transfer)
|
|
if err != nil {
|
|
return
|
|
}
|
|
if balances.NewBatch {
|
|
balances.NextTransferBatch++
|
|
}
|
|
if err := cache.PutNEP17Balances(fromAddr, balances); err != nil {
|
|
return
|
|
}
|
|
}
|
|
if !toAddr.Equals(util.Uint160{}) {
|
|
balances, err := cache.GetNEP17Balances(toAddr)
|
|
if err != nil {
|
|
return
|
|
}
|
|
bs := balances.Trackers[id]
|
|
bs.Balance = *new(big.Int).Add(&bs.Balance, amount)
|
|
bs.LastUpdatedBlock = b.Index
|
|
balances.Trackers[id] = bs
|
|
|
|
transfer.Amount = *amount
|
|
balances.NewBatch, err = cache.AppendNEP17Transfer(toAddr,
|
|
balances.NextTransferBatch, balances.NewBatch, transfer)
|
|
if err != nil {
|
|
return
|
|
}
|
|
if balances.NewBatch {
|
|
balances.NextTransferBatch++
|
|
}
|
|
if err := cache.PutNEP17Balances(toAddr, balances); err != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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.GetNEP17Balances(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
|
|
}
|
|
|
|
// GetNEP17Balances returns NEP17 balances for the acc.
|
|
func (bc *Blockchain) GetNEP17Balances(acc util.Uint160) *state.NEP17Balances {
|
|
bs, err := bc.dao.GetNEP17Balances(acc)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
return bs
|
|
}
|
|
|
|
// GetUtilityTokenBalance returns utility token (GAS) balance for the acc.
|
|
func (bc *Blockchain) GetUtilityTokenBalance(acc util.Uint160) *big.Int {
|
|
bs, err := bc.dao.GetNEP17Balances(acc)
|
|
if err != nil {
|
|
return big.NewInt(0)
|
|
}
|
|
balance := bs.Trackers[bc.contracts.GAS.ID].Balance
|
|
return &balance
|
|
}
|
|
|
|
// 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) {
|
|
bs, err := bc.dao.GetNEP17Balances(acc)
|
|
if err != nil {
|
|
return big.NewInt(0), 0
|
|
}
|
|
neo := bs.Trackers[bc.contracts.NEO.ID]
|
|
return &neo.Balance, neo.LastUpdatedBlock
|
|
}
|
|
|
|
// 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() error {
|
|
var (
|
|
start = time.Now()
|
|
persisted int
|
|
err error
|
|
)
|
|
|
|
persisted, err = bc.dao.Persist()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if persisted > 0 {
|
|
bHeight, err := bc.dao.GetCurrentBlockHeight()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
oldHeight := atomic.SwapUint32(&bc.persistedHeight, bHeight)
|
|
diff := bHeight - oldHeight
|
|
|
|
storedHeaderHeight, _, err := bc.dao.GetCurrentHeaderHeight()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
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", time.Since(start)))
|
|
|
|
// update monitoring metrics.
|
|
updatePersistedHeightMetric(bHeight)
|
|
}
|
|
|
|
return 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.GetConfig().MaxBlockSize
|
|
maxBlockSysFee := bc.GetConfig().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.LoadScriptWithFlags(witness.VerificationScript, 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)
|
|
}
|
|
resEl := vm.Estack().Pop()
|
|
if resEl != nil {
|
|
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, verificationGasLimit)
|
|
}
|
|
|
|
// 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
|
|
}
|
|
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.
|