forkdb

func (*DB) Commit ¶

func (db *DB) Commit(id common.BlockID)

Commit sets the block pointed by id as irreversible. It peals off all other branches, sets id as the start block. It should be regularly called when a block is commited to save ram.

func (*DB) Empty ¶

func (db *DB) Empty() bool

Empty returns true if DB contains no block

func (*DB) FetchBlock ¶

func (db *DB) FetchBlock(id common.BlockID) (common.ISignedBlock, error)

FetchBlock fetches a block corresponding to id

func (*DB) FetchBlockByNum ¶

func (db *DB) FetchBlockByNum(num uint64) []common.ISignedBlock

FetchBlockByNum fetches a block corresponding to the block num

func (*DB) FetchBlockFromMainBranch ¶

func (db *DB) FetchBlockFromMainBranch(num uint64) (common.ISignedBlock, error)

FetchBlockFromMainBranch returns the num'th block on main branch

func (*DB) FetchBlocksFromMainBranch ¶ added in v1.0.2

func (db *DB) FetchBlocksFromMainBranch(num uint64) ([]common.ISignedBlock, error)

FetchBlocksFromMainBranch fetches blocks from [num, head]

func (*DB) FetchBlocksSince ¶

func (db *DB) FetchBlocksSince(id common.BlockID) ([]common.ISignedBlock, []common.BlockID, error)

FetchBlocksSince fetches the main branch starting from id.next

func (*DB) FetchBranch ¶

func (db *DB) FetchBranch(id1, id2 common.BlockID) ([2][]common.BlockID, error)

FetchBranch finds the nearest ancestor of id1 and id2, then returns the 2 branches

func (*DB) FetchUnlinkBlockTail ¶ added in v1.0.2

func (db *DB) FetchUnlinkBlockTail() (*common.BlockID, error)

func (*DB) Head ¶

func (db *DB) Head() common.ISignedBlock

Head returns the head block of the longest chain, returns nil if the db is empty

func (*DB) Illegal ¶

func (db *DB) Illegal(id common.BlockID) bool

Illegal determines if the block has illegal transactions

func (*DB) LastCommitted ¶

func (db *DB) LastCommitted() common.BlockID

LastCommitted...

func (*DB) LoadSnapshot ¶

func (db *DB) LoadSnapshot(avatar reflect.Type, dir string, blog *blocklog.BLog)

LoadSnapshot...

func (*DB) MarkAsIllegal ¶

func (db *DB) MarkAsIllegal(id common.BlockID)

MarkAsIllegal put the block in a blacklist to prevent DDoS attack

func (*DB) Pop ¶

func (db *DB) Pop() common.ISignedBlock

Pop pops the head block NOTE: The only scenarios Pop should be called are when:

 1.a fork switch occurs, hence the main branch and the fork
	  branch has a common ancestor that should NEVER be popped,
   which also means the main branch cannot be popped empty
 2.the newly appended block contains illegal transactions

Popping an empty db results in undefined behaviour

func (*DB) PurgeBranch ¶ added in v1.0.2

func (db *DB) PurgeBranch()

func (*DB) PushBlock ¶

func (db *DB) PushBlock(b common.ISignedBlock) RetCode

PushBlock adds a block. If any of the forkchain has more than defaultSize blocks, purge will be triggered.

func (*DB) Reset ¶ added in v1.0.2

func (db *DB) Reset()

func (*DB) ResetHead ¶

func (db *DB) ResetHead(head common.BlockID)

ResetHead... WARNING: DO NOT call this method unless you know what you are doing

func (*DB) RewindBranch ¶ added in v1.0.3

func (db *DB) RewindBranch(to common.BlockID) *Rewind

func (*DB) Snapshot ¶

func (db *DB) Snapshot(dir string)

Snapshot...

func (*DB) TotalBlockNum ¶

func (db *DB) TotalBlockNum() int

TotalBlockNum returns the total number of blocks contained in the DB

func (*Rewind) ApplyBlock ¶ added in v1.0.3

func (r *Rewind) ApplyBlock(id common.BlockID)

func (*Rewind) Done ¶ added in v1.0.3

func (r *Rewind) Done()

func (*Rewind) Undo ¶ added in v1.0.3

func (r *Rewind) Undo()