model

Documentation

Index

• Variables
• type AcceptanceDataStore
• type BlockBuilder
• type BlockHeaderStore
• type BlockHeap
• type BlockIterator
• type BlockParentBuilder
• type BlockProcessor
• type BlockRelationStore
• type BlockRelations
  • func (br *BlockRelations) Clone() *BlockRelations
  • func (br *BlockRelations) Equal(other *BlockRelations) bool
• type BlockStatusStore
• type BlockStore
• type BlockValidator
• type BlocksWithTrustedDataDAAWindowStore
• type CoinbaseManager
• type ConsensusStateManager
• type ConsensusStateStore
• type DAABlocksStore
• type DAGTopologyManager
• type DAGTraversalManager
• type DBBucket
• type DBCursor
• type DBKey
• type DBManager
• type DBReader
• type DBTransaction
• type DBWriter
• type DifficultyManager
• type FinalityManager
• type FinalityStore
• type FutureCoveringTreeNodeSet
  • func (fctns FutureCoveringTreeNodeSet) Clone() FutureCoveringTreeNodeSet
  • func (fctns FutureCoveringTreeNodeSet) Equal(other FutureCoveringTreeNodeSet) bool
• type GHOSTDAGDataStore
• type GHOSTDAGManager
• type HeaderSelectedTipStore
• type HeadersSelectedChainStore
• type HeadersSelectedTipManager
• type MergeDepthManager
• type MergeDepthRootStore
• type Multiset
• type MultisetStore
• type MutableReachabilityData
• type ParentsManager
• type PastMedianTimeManager
• type PruningManager
• type PruningProofManager
• type PruningStore
• type ReachabilityData
• type ReachabilityDataStore
• type ReachabilityInterval
  • func (ri *ReachabilityInterval) Clone() *ReachabilityInterval
  • func (ri *ReachabilityInterval) Equal(other *ReachabilityInterval) bool
  • func (ri *ReachabilityInterval) String() string
• type ReachabilityManager
• type StagingArea
  • func NewStagingArea() *StagingArea
  • func (sa *StagingArea) Commit(dbTx DBTransaction) error
  • func (sa *StagingArea) GetOrCreateShard(shardID StagingShardID, createFunc func() StagingShard) StagingShard
• type StagingShard
• type StagingShardID
• type Store
• type SubDAG
• type SubDAGBlock
• type SyncManager
• type TransactionValidator
• type UTXODiffReversalData
• type UTXODiffStore
• type WindowHeapSliceStore

Variables

var ErrBlockNotInSelectedParentChain = errors.New("Block is not in selected parent chain")

ErrBlockNotInSelectedParentChain is returned from CreateHeadersSelectedChainBlockLocator if one of the parameters passed to it are not in the headers selected parent chain

var ErrReachedMaxTraversalAllowed = errors.New("Traversal searching for anticone passed the maxTraversalAllowed limit")

ErrReachedMaxTraversalAllowed is returned from AnticoneFromBlocks if `maxTraversalAllowed` was specified and the traversal passed it

var VirtualBlockHash = externalapi.NewDomainHashFromByteArray(&[externalapi.DomainHashSize]byte{
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
})

VirtualBlockHash is a marker hash for the virtual block

var VirtualGenesisBlockHash = externalapi.NewDomainHashFromByteArray(&[externalapi.DomainHashSize]byte{
	0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe,
	0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe,
	0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe,
	0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe,
})

VirtualGenesisBlockHash is a marker hash for the virtual genesis block

Types

type AcceptanceDataStore

type AcceptanceDataStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, acceptanceData externalapi.AcceptanceData)
	IsStaged(stagingArea *StagingArea) bool
	Get(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.AcceptanceData, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
}

AcceptanceDataStore represents a store of AcceptanceData

type BlockBuilder

type BlockBuilder interface {
	BuildBlock(coinbaseData *externalapi.DomainCoinbaseData,
		transactions []*externalapi.DomainTransaction) (block *externalapi.DomainBlock, coinbaseHasRedReward bool, err error)
}

BlockBuilder is responsible for creating blocks from the current state

type BlockHeaderStore

type BlockHeaderStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, blockHeader externalapi.BlockHeader)
	IsStaged(stagingArea *StagingArea) bool
	BlockHeader(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.BlockHeader, error)
	HasBlockHeader(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	BlockHeaders(dbContext DBReader, stagingArea *StagingArea, blockHashes []*externalapi.DomainHash) ([]externalapi.BlockHeader, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
	Count(stagingArea *StagingArea) uint64
}

BlockHeaderStore represents a store of block headers

type BlockHeap

type BlockHeap interface {
	Push(blockHash *externalapi.DomainHash) error
	PushSlice(blockHash []*externalapi.DomainHash) error
	Pop() *externalapi.DomainHash
	Len() int
	ToSlice() []*externalapi.DomainHash
}

BlockHeap represents a heap of block hashes, providing a priority-queue functionality

type BlockIterator

type BlockIterator interface {
	First() bool
	Next() bool
	Get() (*externalapi.DomainHash, error)
	Close() error
}

BlockIterator is an iterator over blocks according to some order.

type BlockParentBuilder

type BlockParentBuilder interface {
	BuildParents(stagingArea *StagingArea,
		daaScore uint64,
		directParentHashes []*externalapi.DomainHash) ([]externalapi.BlockLevelParents, error)
}

BlockParentBuilder exposes a method to build super-block parents for a given set of direct parents

type BlockProcessor

type BlockProcessor interface {
	ValidateAndInsertBlock(block *externalapi.DomainBlock, shouldValidateAgainstUTXO bool) (*externalapi.VirtualChangeSet, externalapi.BlockStatus, error)
	ValidateAndInsertImportedPruningPoint(newPruningPoint *externalapi.DomainHash) error
	ValidateAndInsertBlockWithTrustedData(block *externalapi.BlockWithTrustedData, validateUTXO bool) (*externalapi.VirtualChangeSet, externalapi.BlockStatus, error)
}

BlockProcessor is responsible for processing incoming blocks

type BlockRelationStore

type BlockRelationStore interface {
	Store
	StageBlockRelation(stagingArea *StagingArea, blockHash *externalapi.DomainHash, blockRelations *BlockRelations)
	IsStaged(stagingArea *StagingArea) bool
	BlockRelation(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*BlockRelations, error)
	Has(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	UnstageAll(stagingArea *StagingArea)
}

BlockRelationStore represents a store of BlockRelations

type BlockRelations

type BlockRelations struct {
	Parents  []*externalapi.DomainHash
	Children []*externalapi.DomainHash
}

BlockRelations represents a block's parent/child relations

func (*BlockRelations) Clone

func (br *BlockRelations) Clone() *BlockRelations

Clone returns a clone of BlockRelations

func (*BlockRelations) Equal

func (br *BlockRelations) Equal(other *BlockRelations) bool

Equal returns whether br equals to other

type BlockStatusStore

type BlockStatusStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, blockStatus externalapi.BlockStatus)
	IsStaged(stagingArea *StagingArea) bool
	Get(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.BlockStatus, error)
	Exists(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
}

BlockStatusStore represents a store of BlockStatuses

type BlockStore

type BlockStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, block *externalapi.DomainBlock)
	IsStaged(stagingArea *StagingArea) bool
	Block(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.DomainBlock, error)
	HasBlock(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	Blocks(dbContext DBReader, stagingArea *StagingArea, blockHashes []*externalapi.DomainHash) ([]*externalapi.DomainBlock, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
	Count(stagingArea *StagingArea) uint64
	AllBlockHashesIterator(dbContext DBReader) (BlockIterator, error)
}

BlockStore represents a store of blocks

type BlockValidator

type BlockValidator interface {
	ValidateHeaderInIsolation(stagingArea *StagingArea, blockHash *externalapi.DomainHash) error
	ValidateBodyInIsolation(stagingArea *StagingArea, blockHash *externalapi.DomainHash) error
	ValidateHeaderInContext(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) error
	ValidateBodyInContext(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) error
	ValidatePruningPointViolationAndProofOfWorkAndDifficulty(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) error
}

BlockValidator exposes a set of validation classes, after which it's possible to determine whether a block is valid

type BlocksWithTrustedDataDAAWindowStore

type BlocksWithTrustedDataDAAWindowStore interface {
	Store
	IsStaged(stagingArea *StagingArea) bool
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, index uint64, ghostdagData *externalapi.BlockGHOSTDAGDataHashPair)
	DAAWindowBlock(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash, index uint64) (*externalapi.BlockGHOSTDAGDataHashPair, error)
}

BlocksWithTrustedDataDAAWindowStore stores the DAA window of blocks with trusted data

type CoinbaseManager

type CoinbaseManager interface {
	ExpectedCoinbaseTransaction(stagingArea *StagingArea, blockHash *externalapi.DomainHash,
		coinbaseData *externalapi.DomainCoinbaseData) (expectedTransaction *externalapi.DomainTransaction, hasRedReward bool, err error)
	CalcBlockSubsidy(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (uint64, error)
	ExtractCoinbaseDataBlueScoreAndSubsidy(coinbaseTx *externalapi.DomainTransaction) (blueScore uint64, coinbaseData *externalapi.DomainCoinbaseData, subsidy uint64, err error)
}

CoinbaseManager exposes methods for handling blocks' coinbase transactions

type ConsensusStateManager

type ConsensusStateManager interface {
	AddBlock(stagingArea *StagingArea, blockHash *externalapi.DomainHash, updateVirtual bool) (*externalapi.SelectedChainPath, externalapi.UTXODiff, *UTXODiffReversalData, error)
	PopulateTransactionWithUTXOEntries(stagingArea *StagingArea, transaction *externalapi.DomainTransaction) error
	ImportPruningPointUTXOSet(stagingArea *StagingArea, newPruningPoint *externalapi.DomainHash) error
	ImportPruningPoints(stagingArea *StagingArea, pruningPoints []externalapi.BlockHeader) error
	RestorePastUTXOSetIterator(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.ReadOnlyUTXOSetIterator, error)
	CalculatePastUTXOAndAcceptanceData(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.UTXODiff, externalapi.AcceptanceData, Multiset, error)
	GetVirtualSelectedParentChainFromBlock(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.SelectedChainPath, error)
	RecoverUTXOIfRequired() error
	ReverseUTXODiffs(tipHash *externalapi.DomainHash, reversalData *UTXODiffReversalData) error
	ResolveVirtual(maxBlocksToResolve uint64) (*externalapi.VirtualChangeSet, bool, error)
}

ConsensusStateManager manages the node's consensus state

type ConsensusStateStore

type ConsensusStateStore interface {
	Store
	IsStaged(stagingArea *StagingArea) bool

	StageVirtualUTXODiff(stagingArea *StagingArea, virtualUTXODiff externalapi.UTXODiff)
	UTXOByOutpoint(dbContext DBReader, stagingArea *StagingArea, outpoint *externalapi.DomainOutpoint) (externalapi.UTXOEntry, error)
	HasUTXOByOutpoint(dbContext DBReader, stagingArea *StagingArea, outpoint *externalapi.DomainOutpoint) (bool, error)
	VirtualUTXOSetIterator(dbContext DBReader, stagingArea *StagingArea) (externalapi.ReadOnlyUTXOSetIterator, error)
	VirtualUTXOs(dbContext DBReader, fromOutpoint *externalapi.DomainOutpoint, limit int) ([]*externalapi.OutpointAndUTXOEntryPair, error)

	StageTips(stagingArea *StagingArea, tipHashes []*externalapi.DomainHash)
	Tips(stagingArea *StagingArea, dbContext DBReader) ([]*externalapi.DomainHash, error)

	StartImportingPruningPointUTXOSet(dbContext DBWriter) error
	HadStartedImportingPruningPointUTXOSet(dbContext DBWriter) (bool, error)
	ImportPruningPointUTXOSetIntoVirtualUTXOSet(dbContext DBWriter, pruningPointUTXOSetIterator externalapi.ReadOnlyUTXOSetIterator) error
	FinishImportingPruningPointUTXOSet(dbContext DBWriter) error
}

ConsensusStateStore represents a store for the current consensus state

type DAABlocksStore

type DAABlocksStore interface {
	Store
	StageDAAScore(stagingArea *StagingArea, blockHash *externalapi.DomainHash, daaScore uint64)
	StageBlockDAAAddedBlocks(stagingArea *StagingArea, blockHash *externalapi.DomainHash, addedBlocks []*externalapi.DomainHash)
	IsStaged(stagingArea *StagingArea) bool
	DAAAddedBlocks(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	DAAScore(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (uint64, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
}

DAABlocksStore represents a store of ???

type DAGTopologyManager

type DAGTopologyManager interface {
	Parents(stagingArea *StagingArea, blockHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	Children(stagingArea *StagingArea, blockHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	IsParentOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	IsChildOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	IsAncestorOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	IsAncestorOfAny(stagingArea *StagingArea, blockHash *externalapi.DomainHash, potentialDescendants []*externalapi.DomainHash) (bool, error)
	IsAnyAncestorOf(stagingArea *StagingArea, potentialAncestors []*externalapi.DomainHash, blockHash *externalapi.DomainHash) (bool, error)
	IsInSelectedParentChainOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	ChildInSelectedParentChainOf(stagingArea *StagingArea, lowHash, highHash *externalapi.DomainHash) (*externalapi.DomainHash, error)

	SetParents(stagingArea *StagingArea, blockHash *externalapi.DomainHash, parentHashes []*externalapi.DomainHash) error
}

DAGTopologyManager exposes methods for querying relationships between blocks in the DAG

type DAGTraversalManager

type DAGTraversalManager interface {
	LowestChainBlockAboveOrEqualToBlueScore(stagingArea *StagingArea, highHash *externalapi.DomainHash, blueScore uint64) (*externalapi.DomainHash, error)
	// SelectedChildIterator should return a BlockIterator that iterates
	// from lowHash (exclusive) to highHash (inclusive) over highHash's selected parent chain
	SelectedChildIterator(stagingArea *StagingArea, highHash, lowHash *externalapi.DomainHash, includeLowHash bool) (BlockIterator, error)
	SelectedChild(stagingArea *StagingArea, highHash, lowHash *externalapi.DomainHash) (*externalapi.DomainHash, error)
	AnticoneFromBlocks(stagingArea *StagingArea, tips []*externalapi.DomainHash, blockHash *externalapi.DomainHash, maxTraversalAllowed uint64) ([]*externalapi.DomainHash, error)
	AnticoneFromVirtualPOV(stagingArea *StagingArea, blockHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	BlockWindow(stagingArea *StagingArea, highHash *externalapi.DomainHash, windowSize int) ([]*externalapi.DomainHash, error)
	DAABlockWindow(stagingArea *StagingArea, highHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	NewDownHeap(stagingArea *StagingArea) BlockHeap
	NewUpHeap(stagingArea *StagingArea) BlockHeap
	CalculateChainPath(stagingArea *StagingArea, fromBlockHash, toBlockHash *externalapi.DomainHash) (
		*externalapi.SelectedChainPath, error)
}

DAGTraversalManager exposes methods for traversing blocks in the DAG

type DBBucket

type DBBucket interface {
	Bucket(bucketBytes []byte) DBBucket
	Key(suffix []byte) DBKey
	Path() []byte
}

DBBucket is an interface for a database bucket

type DBCursor

type DBCursor interface {
	// Next moves the iterator to the next key/value pair. It returns whether the
	// iterator is exhausted. Panics if the cursor is closed.
	Next() bool

	// First moves the iterator to the first key/value pair. It returns false if
	// such a pair does not exist. Panics if the cursor is closed.
	First() bool

	// Seek moves the iterator to the first key/value pair whose key is greater
	// than or equal to the given key. It returns ErrNotFound if such pair does not
	// exist.
	Seek(key DBKey) error

	// Key returns the key of the current key/value pair, or ErrNotFound if done.
	// The caller should not modify the contents of the returned key, and
	// its contents may change on the next call to Next.
	Key() (DBKey, error)

	// Value returns the value of the current key/value pair, or ErrNotFound if done.
	// The caller should not modify the contents of the returned slice, and its
	// contents may change on the next call to Next.
	Value() ([]byte, error)

	// Close releases associated resources.
	Close() error
}

DBCursor iterates over database entries given some bucket.

type DBKey

type DBKey interface {
	Bytes() []byte
	Bucket() DBBucket
	Suffix() []byte
}

DBKey is an interface for a database key

type DBManager

type DBManager interface {
	DBWriter

	// Begin begins a new database transaction.
	Begin() (DBTransaction, error)
}

DBManager defines the interface of a database that can begin transactions and read data.

type DBReader

type DBReader interface {
	// Get gets the value for the given key. It returns
	// ErrNotFound if the given key does not exist.
	Get(key DBKey) ([]byte, error)

	// Has returns true if the database does contains the
	// given key.
	Has(key DBKey) (bool, error)

	// Cursor begins a new cursor over the given bucket.
	Cursor(bucket DBBucket) (DBCursor, error)
}

DBReader defines a proxy over domain data access

type DBTransaction

type DBTransaction interface {
	DBWriter

	// Rollback rolls back whatever changes were made to the
	// database within this transaction.
	Rollback() error

	// Commit commits whatever changes were made to the database
	// within this transaction.
	Commit() error

	// RollbackUnlessClosed rolls back changes that were made to
	// the database within the transaction, unless the transaction
	// had already been closed using either Rollback or Commit.
	RollbackUnlessClosed() error
}

DBTransaction is a proxy over domain data access that requires an open database transaction

type DBWriter

type DBWriter interface {
	DBReader

	// Put sets the value for the given key. It overwrites
	// any previous value for that key.
	Put(key DBKey, value []byte) error

	// Delete deletes the value for the given key. Will not
	// return an error if the key doesn't exist.
	Delete(key DBKey) error
}

DBWriter is an interface to write to the database

type DifficultyManager

type DifficultyManager interface {
	StageDAADataAndReturnRequiredDifficulty(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) (uint32, error)
	RequiredDifficulty(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (uint32, error)
	EstimateNetworkHashesPerSecond(startHash *externalapi.DomainHash, windowSize int) (uint64, error)
}

DifficultyManager provides a method to resolve the difficulty value of a block

type FinalityManager

type FinalityManager interface {
	VirtualFinalityPoint(stagingArea *StagingArea) (*externalapi.DomainHash, error)
	FinalityPoint(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) (*externalapi.DomainHash, error)
}

FinalityManager provides method to validate that a block does not violate finality

type FinalityStore

type FinalityStore interface {
	Store
	IsStaged(stagingArea *StagingArea) bool
	StageFinalityPoint(stagingArea *StagingArea, blockHash *externalapi.DomainHash, finalityPointHash *externalapi.DomainHash)
	FinalityPoint(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.DomainHash, error)
}

FinalityStore represents a store for finality data

type FutureCoveringTreeNodeSet

type FutureCoveringTreeNodeSet []*externalapi.DomainHash

FutureCoveringTreeNodeSet represents a collection of blocks in the future of a certain block. Once a block B is added to the DAG, every block A_i in B's selected parent anticone must register B in its FutureCoveringTreeNodeSet. This allows to relatively quickly (O(log(|FutureCoveringTreeNodeSet|))) query whether B is a descendent (is in the "future") of any block that previously registered it.

Note that FutureCoveringTreeNodeSet is meant to be queried only if B is not a reachability tree descendant of the block in question, as reachability tree queries are always O(1).

See insertNode, hasAncestorOf, and isInPast for further details.

func (FutureCoveringTreeNodeSet) Clone

func (fctns FutureCoveringTreeNodeSet) Clone() FutureCoveringTreeNodeSet

Clone returns a clone of FutureCoveringTreeNodeSet

func (FutureCoveringTreeNodeSet) Equal

func (fctns FutureCoveringTreeNodeSet) Equal(other FutureCoveringTreeNodeSet) bool

Equal returns whether fctns equals to other

type GHOSTDAGDataStore

type GHOSTDAGDataStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, blockGHOSTDAGData *externalapi.BlockGHOSTDAGData, isTrustedData bool)
	IsStaged(stagingArea *StagingArea) bool
	Get(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash, isTrustedData bool) (*externalapi.BlockGHOSTDAGData, error)
	UnstageAll(stagingArea *StagingArea)
}

GHOSTDAGDataStore represents a store of BlockGHOSTDAGData

type GHOSTDAGManager

type GHOSTDAGManager interface {
	GHOSTDAG(stagingArea *StagingArea, blockHash *externalapi.DomainHash) error
	ChooseSelectedParent(stagingArea *StagingArea, blockHashes ...*externalapi.DomainHash) (*externalapi.DomainHash, error)
	Less(blockHashA *externalapi.DomainHash, ghostdagDataA *externalapi.BlockGHOSTDAGData,
		blockHashB *externalapi.DomainHash, ghostdagDataB *externalapi.BlockGHOSTDAGData) bool
	GetSortedMergeSet(stagingArea *StagingArea, current *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
}

GHOSTDAGManager resolves and manages GHOSTDAG block data

type HeaderSelectedTipStore

type HeaderSelectedTipStore interface {
	Store
	Stage(stagingArea *StagingArea, selectedTip *externalapi.DomainHash)
	IsStaged(stagingArea *StagingArea) bool
	HeadersSelectedTip(dbContext DBReader, stagingArea *StagingArea) (*externalapi.DomainHash, error)
	Has(dbContext DBReader, stagingArea *StagingArea) (bool, error)
}

HeaderSelectedTipStore represents a store of the headers selected tip

type HeadersSelectedChainStore

type HeadersSelectedChainStore interface {
	Store
	Stage(dbContext DBReader, stagingArea *StagingArea, chainChanges *externalapi.SelectedChainPath) error
	IsStaged(stagingArea *StagingArea) bool
	GetIndexByHash(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (uint64, error)
	GetHashByIndex(dbContext DBReader, stagingArea *StagingArea, index uint64) (*externalapi.DomainHash, error)
}

HeadersSelectedChainStore represents a store of the headers selected chain

type HeadersSelectedTipManager

type HeadersSelectedTipManager interface {
	AddHeaderTip(stagingArea *StagingArea, hash *externalapi.DomainHash) error
}

HeadersSelectedTipManager manages the state of the headers selected tip

type MergeDepthManager

type MergeDepthManager interface {
	CheckBoundedMergeDepth(stagingArea *StagingArea, blockHash *externalapi.DomainHash, isBlockWithTrustedData bool) error
	NonBoundedMergeDepthViolatingBlues(stagingArea *StagingArea, blockHash, mergeDepthRoot *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	VirtualMergeDepthRoot(stagingArea *StagingArea) (*externalapi.DomainHash, error)
}

MergeDepthManager is used to validate mergeDepth for blocks

type MergeDepthRootStore

type MergeDepthRootStore interface {
	Store
	IsStaged(stagingArea *StagingArea) bool
	StageMergeDepthRoot(stagingArea *StagingArea, blockHash *externalapi.DomainHash, root *externalapi.DomainHash)
	MergeDepthRoot(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.DomainHash, error)
}

MergeDepthRootStore represents a store for merge depth roots

type Multiset

type Multiset interface {
	Add(data []byte)
	Remove(data []byte)
	Hash() *externalapi.DomainHash
	Serialize() []byte
	Clone() Multiset
}

Multiset represents a secp256k1 multiset

type MultisetStore

type MultisetStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, multiset Multiset)
	IsStaged(stagingArea *StagingArea) bool
	Get(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (Multiset, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
}

MultisetStore represents a store of Multisets

type MutableReachabilityData

type MutableReachabilityData interface {
	ReachabilityData

	AddChild(child *externalapi.DomainHash)
	SetParent(parent *externalapi.DomainHash)
	SetInterval(interval *ReachabilityInterval)
	SetFutureCoveringSet(futureCoveringSet FutureCoveringTreeNodeSet)
}

MutableReachabilityData represents a block's MutableReachabilityData, with ability to edit it

type ParentsManager

type ParentsManager interface {
	ParentsAtLevel(blockHeader externalapi.BlockHeader, level int) externalapi.BlockLevelParents
	Parents(blockHeader externalapi.BlockHeader) []externalapi.BlockLevelParents
}

ParentsManager lets is a wrapper above header parents that replaces empty parents with genesis when needed.

type PastMedianTimeManager

type PastMedianTimeManager interface {
	PastMedianTime(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (int64, error)
	InvalidateVirtualPastMedianTimeCache()
}

PastMedianTimeManager provides a method to resolve the past median time of a block

type PruningManager

type PruningManager interface {
	UpdatePruningPointByVirtual(stagingArea *StagingArea) error
	IsValidPruningPoint(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	ArePruningPointsViolatingFinality(stagingArea *StagingArea, pruningPoints []externalapi.BlockHeader) (bool, error)
	ArePruningPointsInValidChain(stagingArea *StagingArea) (bool, error)
	ClearImportedPruningPointData() error
	AppendImportedPruningPointUTXOs(outpointAndUTXOEntryPairs []*externalapi.OutpointAndUTXOEntryPair) error
	UpdatePruningPointIfRequired() error
	PruneAllBlocksBelow(stagingArea *StagingArea, pruningPointHash *externalapi.DomainHash) error
	PruningPointAndItsAnticone() ([]*externalapi.DomainHash, error)
	ExpectedHeaderPruningPoint(stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.DomainHash, error)
	TrustedBlockAssociatedGHOSTDAGDataBlockHashes(stagingArea *StagingArea, blockHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
}

PruningManager resolves and manages the current pruning point

type PruningProofManager

type PruningProofManager interface {
	BuildPruningPointProof(stagingArea *StagingArea) (*externalapi.PruningPointProof, error)
	ValidatePruningPointProof(pruningPointProof *externalapi.PruningPointProof) error
	ApplyPruningPointProof(pruningPointProof *externalapi.PruningPointProof) error
}

PruningProofManager builds, validates and applies pruning proofs.

type PruningStore

type PruningStore interface {
	Store
	StagePruningPoint(dbContext DBWriter, stagingArea *StagingArea, pruningPointBlockHash *externalapi.DomainHash) error
	StagePruningPointByIndex(dbContext DBReader, stagingArea *StagingArea,
		pruningPointBlockHash *externalapi.DomainHash, index uint64) error
	StagePruningPointCandidate(stagingArea *StagingArea, candidate *externalapi.DomainHash)
	IsStaged(stagingArea *StagingArea) bool
	PruningPointCandidate(dbContext DBReader, stagingArea *StagingArea) (*externalapi.DomainHash, error)
	HasPruningPointCandidate(dbContext DBReader, stagingArea *StagingArea) (bool, error)
	PruningPoint(dbContext DBReader, stagingArea *StagingArea) (*externalapi.DomainHash, error)
	HasPruningPoint(dbContext DBReader, stagingArea *StagingArea) (bool, error)
	CurrentPruningPointIndex(dbContext DBReader, stagingArea *StagingArea) (uint64, error)
	PruningPointByIndex(dbContext DBReader, stagingArea *StagingArea, index uint64) (*externalapi.DomainHash, error)

	StageStartUpdatingPruningPointUTXOSet(stagingArea *StagingArea)
	HadStartedUpdatingPruningPointUTXOSet(dbContext DBWriter) (bool, error)
	FinishUpdatingPruningPointUTXOSet(dbContext DBWriter) error
	UpdatePruningPointUTXOSet(dbContext DBWriter, diff externalapi.UTXODiff) error

	ClearImportedPruningPointUTXOs(dbContext DBWriter) error
	AppendImportedPruningPointUTXOs(dbTx DBTransaction, outpointAndUTXOEntryPairs []*externalapi.OutpointAndUTXOEntryPair) error
	ImportedPruningPointUTXOIterator(dbContext DBReader) (externalapi.ReadOnlyUTXOSetIterator, error)
	ClearImportedPruningPointMultiset(dbContext DBWriter) error
	ImportedPruningPointMultiset(dbContext DBReader) (Multiset, error)
	UpdateImportedPruningPointMultiset(dbTx DBTransaction, multiset Multiset) error
	CommitImportedPruningPointUTXOSet(dbContext DBWriter) error
	PruningPointUTXOs(dbContext DBReader, fromOutpoint *externalapi.DomainOutpoint, limit int) ([]*externalapi.OutpointAndUTXOEntryPair, error)
	PruningPointUTXOIterator(dbContext DBReader) (externalapi.ReadOnlyUTXOSetIterator, error)
}

PruningStore represents a store for the current pruning state

type ReachabilityData

type ReachabilityData interface {
	Children() []*externalapi.DomainHash
	Parent() *externalapi.DomainHash
	Interval() *ReachabilityInterval
	FutureCoveringSet() FutureCoveringTreeNodeSet
	CloneMutable() MutableReachabilityData
	Equal(other ReachabilityData) bool
}

ReachabilityData is a read-only version of a block's MutableReachabilityData Use CloneWritable to edit the MutableReachabilityData.

type ReachabilityDataStore

type ReachabilityDataStore interface {
	Store
	StageReachabilityData(stagingArea *StagingArea, blockHash *externalapi.DomainHash, reachabilityData ReachabilityData)
	StageReachabilityReindexRoot(stagingArea *StagingArea, reachabilityReindexRoot *externalapi.DomainHash)
	IsStaged(stagingArea *StagingArea) bool
	ReachabilityData(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (ReachabilityData, error)
	HasReachabilityData(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	ReachabilityReindexRoot(dbContext DBReader, stagingArea *StagingArea) (*externalapi.DomainHash, error)
	Delete(dbContext DBWriter) error
}

ReachabilityDataStore represents a store of ReachabilityData

type ReachabilityInterval

type ReachabilityInterval struct {
	Start uint64
	End   uint64
}

ReachabilityInterval represents an interval to be used within the tree reachability algorithm. See ReachabilityTreeNode for further details.

func (*ReachabilityInterval) Clone

func (ri *ReachabilityInterval) Clone() *ReachabilityInterval

Clone returns a clone of ReachabilityInterval

func (*ReachabilityInterval) Equal

func (ri *ReachabilityInterval) Equal(other *ReachabilityInterval) bool

Equal returns whether ri equals to other

func (*ReachabilityInterval) String

func (ri *ReachabilityInterval) String() string

type ReachabilityManager

type ReachabilityManager interface {
	Init(stagingArea *StagingArea) error
	AddBlock(stagingArea *StagingArea, blockHash *externalapi.DomainHash) error
	IsReachabilityTreeAncestorOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	IsDAGAncestorOf(stagingArea *StagingArea, blockHashA *externalapi.DomainHash, blockHashB *externalapi.DomainHash) (bool, error)
	UpdateReindexRoot(stagingArea *StagingArea, selectedTip *externalapi.DomainHash) error
	FindNextAncestor(stagingArea *StagingArea, descendant, ancestor *externalapi.DomainHash) (*externalapi.DomainHash, error)
}

ReachabilityManager maintains a structure that allows to answer reachability queries in sub-linear time

type StagingArea

type StagingArea struct {
	// contains filtered or unexported fields
}

StagingArea is single changeset inside the consensus database, similar to a transaction in a classic database. Each StagingArea consists of multiple StagingShards, one for each dataStore that has any changes within it. To enable maximum flexibility for all stores, each has to define it's own Commit method, and pass it to the StagingArea through the relevant StagingShard.

When the StagingArea is being Committed, it goes over all it's shards, and commits those one-by-one. Since Commit happens in a DatabaseTransaction, a StagingArea is atomic.

func NewStagingArea

func NewStagingArea() *StagingArea

NewStagingArea creates a new, empty staging area.

func (*StagingArea) Commit

func (sa *StagingArea) Commit(dbTx DBTransaction) error

Commit goes over all the Shards in the StagingArea and commits them, inside the provided database transaction. Note: the transaction itself is not committed, this is the callers responsibility to commit it.

func (*StagingArea) GetOrCreateShard

func (sa *StagingArea) GetOrCreateShard(shardID StagingShardID, createFunc func() StagingShard) StagingShard

GetOrCreateShard attempts to retrieve a shard with the given name. If it does not exist - a new shard is created using `createFunc`.

type StagingShard

type StagingShard interface {
	Commit(dbTx DBTransaction) error
}

StagingShard is an interface that enables every store to have it's own Commit logic See StagingArea for more details

type StagingShardID

type StagingShardID uint64

StagingShardID is used to identify each of the store's staging shards

type Store

type Store interface {
}

Store is a common interface for data stores

type SubDAG

type SubDAG struct {
	RootHashes []*externalapi.DomainHash
	TipHashes  []*externalapi.DomainHash
	Blocks     map[externalapi.DomainHash]*SubDAGBlock
}

SubDAG represents a context-free representation of a partial DAG

type SubDAGBlock

type SubDAGBlock struct {
	BlockHash    *externalapi.DomainHash
	ParentHashes []*externalapi.DomainHash
	ChildHashes  []*externalapi.DomainHash
}

SubDAGBlock represents a block in a SubDAG

type SyncManager

type SyncManager interface {
	GetHashesBetween(stagingArea *StagingArea, lowHash, highHash *externalapi.DomainHash, maxBlocks uint64) (
		hashes []*externalapi.DomainHash, actualHighHash *externalapi.DomainHash, err error)
	GetAnticone(stagingArea *StagingArea, blockHash, contextHash *externalapi.DomainHash, maxBlocks uint64) (hashes []*externalapi.DomainHash, err error)
	GetMissingBlockBodyHashes(stagingArea *StagingArea, highHash *externalapi.DomainHash) ([]*externalapi.DomainHash, error)
	CreateBlockLocator(stagingArea *StagingArea, lowHash, highHash *externalapi.DomainHash, limit uint32) (
		externalapi.BlockLocator, error)
	CreateHeadersSelectedChainBlockLocator(stagingArea *StagingArea, lowHash, highHash *externalapi.DomainHash) (
		externalapi.BlockLocator, error)
	GetSyncInfo(stagingArea *StagingArea) (*externalapi.SyncInfo, error)
}

SyncManager exposes functions to support sync between nexelliad nodes

type TransactionValidator

type TransactionValidator interface {
	ValidateTransactionInIsolation(transaction *externalapi.DomainTransaction, povDAAScore uint64) error
	ValidateTransactionInContextIgnoringUTXO(stagingArea *StagingArea, tx *externalapi.DomainTransaction,
		povBlockHash *externalapi.DomainHash, povBlockPastMedianTime int64) error
	ValidateTransactionInContextAndPopulateFee(stagingArea *StagingArea,
		tx *externalapi.DomainTransaction, povBlockHash *externalapi.DomainHash) error
	PopulateMass(transaction *externalapi.DomainTransaction)
}

TransactionValidator exposes a set of validation classes, after which it's possible to determine whether a transaction is valid

type UTXODiffReversalData

type UTXODiffReversalData struct {
	SelectedParentHash     *externalapi.DomainHash
	SelectedParentUTXODiff externalapi.UTXODiff
}

UTXODiffReversalData is used by ConsensusStateManager to reverse the UTXODiffs during a re-org

type UTXODiffStore

type UTXODiffStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, utxoDiff externalapi.UTXODiff, utxoDiffChild *externalapi.DomainHash)
	IsStaged(stagingArea *StagingArea) bool
	UTXODiff(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (externalapi.UTXODiff, error)
	UTXODiffChild(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (*externalapi.DomainHash, error)
	HasUTXODiffChild(dbContext DBReader, stagingArea *StagingArea, blockHash *externalapi.DomainHash) (bool, error)
	Delete(stagingArea *StagingArea, blockHash *externalapi.DomainHash)
}

UTXODiffStore represents a store of UTXODiffs

type WindowHeapSliceStore

type WindowHeapSliceStore interface {
	Store
	Stage(stagingArea *StagingArea, blockHash *externalapi.DomainHash, windowSize int, pairs []*externalapi.BlockGHOSTDAGDataHashPair)
	IsStaged(stagingArea *StagingArea) bool
	Get(stagingArea *StagingArea, blockHash *externalapi.DomainHash, windowSize int) ([]*externalapi.BlockGHOSTDAGDataHashPair, error)
}

WindowHeapSliceStore caches the slices that are needed for the heap implementation of DAGTraversalManager.BlockWindow