blockchain

Documentation

Index

• Constants
• type BlockPool
  • func NewBlockPool(start int64, requestsCh chan<- BlockRequest, timeoutsCh chan<- p2p.ID) *BlockPool
  • func (pool *BlockPool) AddBlock(peerID p2p.ID, block *types.Block, blockSize int)
  • func (pool *BlockPool) GetStatus() (height int64, numPending int32, lenRequesters int)
  • func (pool *BlockPool) IsCaughtUp() bool
  • func (pool *BlockPool) MaxPeerHeight() int64
  • func (pool *BlockPool) OnStart() error
  • func (pool *BlockPool) OnStop()
  • func (pool *BlockPool) PeekTwoBlocks() (first *types.Block, second *types.Block)
  • func (pool *BlockPool) PopRequest()
  • func (pool *BlockPool) RedoRequest(height int64) p2p.ID
  • func (pool *BlockPool) RemovePeer(peerID p2p.ID)
  • func (pool *BlockPool) SetPeerHeight(peerID p2p.ID, height int64)
• type BlockRequest
• type BlockStore
  • func NewBlockStore(db dbm.DB) *BlockStore
  • func (bs *BlockStore) GetReader(key []byte) io.Reader
  • func (bs *BlockStore) Height() int64
  • func (bs *BlockStore) LoadBlock(height int64) *types.Block
  • func (bs *BlockStore) LoadBlockCommit(height int64) *types.Commit
  • func (bs *BlockStore) LoadBlockMeta(height int64) *types.BlockMeta
  • func (bs *BlockStore) LoadBlockPart(height int64, index int) *types.Part
  • func (bs *BlockStore) LoadSeenCommit(height int64) *types.Commit
  • func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit)
• type BlockStoreStateJSON
  • func LoadBlockStoreStateJSON(db dbm.DB) BlockStoreStateJSON
  • func (bsj BlockStoreStateJSON) Save(db dbm.DB)
• type BlockchainMessage
  • func DecodeMessage(bz []byte, maxSize int) (msgType byte, msg BlockchainMessage, err error)
• type BlockchainReactor
  • func NewBlockchainReactor(state sm.State, blockExec *sm.BlockExecutor, store *BlockStore, fastSync bool) *BlockchainReactor
  • func (bcR *BlockchainReactor) AddPeer(peer p2p.Peer)
  • func (bcR *BlockchainReactor) BroadcastStatusRequest() error
  • func (bcR *BlockchainReactor) GetChannels() []*p2p.ChannelDescriptor
  • func (bcR *BlockchainReactor) OnStart() error
  • func (bcR *BlockchainReactor) OnStop()
  • func (bcR *BlockchainReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte)
  • func (bcR *BlockchainReactor) RemovePeer(peer p2p.Peer, reason interface{})
  • func (bcR *BlockchainReactor) SetLogger(l log.Logger)

Constants

const (
	// BlockchainChannel is a channel for blocks and status updates (`BlockStore` height)
	BlockchainChannel = byte(0x40)
)

Types

type BlockPool

type BlockPool struct {
	cmn.BaseService
	// contains filtered or unexported fields
}

func NewBlockPool

func NewBlockPool(start int64, requestsCh chan<- BlockRequest, timeoutsCh chan<- p2p.ID) *BlockPool

func (*BlockPool) AddBlock

func (pool *BlockPool) AddBlock(peerID p2p.ID, block *types.Block, blockSize int)

TODO: ensure that blocks come in order for each peer.

func (*BlockPool) GetStatus

func (pool *BlockPool) GetStatus() (height int64, numPending int32, lenRequesters int)

func (*BlockPool) IsCaughtUp

func (pool *BlockPool) IsCaughtUp() bool

TODO: relax conditions, prevent abuse.

func (*BlockPool) MaxPeerHeight

func (pool *BlockPool) MaxPeerHeight() int64

MaxPeerHeight returns the highest height reported by a peer.

func (*BlockPool) OnStart

func (pool *BlockPool) OnStart() error

func (*BlockPool) OnStop

func (pool *BlockPool) OnStop()

func (*BlockPool) PeekTwoBlocks

func (pool *BlockPool) PeekTwoBlocks() (first *types.Block, second *types.Block)

We need to see the second block's Commit to validate the first block. So we peek two blocks at a time. The caller will verify the commit.

func (*BlockPool) PopRequest

func (pool *BlockPool) PopRequest()

Pop the first block at pool.height It must have been validated by 'second'.Commit from PeekTwoBlocks().

func (*BlockPool) RedoRequest

func (pool *BlockPool) RedoRequest(height int64) p2p.ID

Invalidates the block at pool.height, Remove the peer and redo request from others. Returns the ID of the removed peer.

func (*BlockPool) RemovePeer

func (pool *BlockPool) RemovePeer(peerID p2p.ID)

func (*BlockPool) SetPeerHeight

func (pool *BlockPool) SetPeerHeight(peerID p2p.ID, height int64)

Sets the peer's alleged blockchain height.

type BlockRequest

type BlockRequest struct {
	Height int64
	PeerID p2p.ID
}

type BlockStore

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

BlockStore is a simple low level store for blocks.

There are three types of information stored:

• BlockMeta: Meta information about each block
• Block part: Parts of each block, aggregated w/ PartSet
• Commit: The commit part of each block, for gossiping precommit votes

Currently the precommit signatures are duplicated in the Block parts as well as the Commit. In the future this may change, perhaps by moving the Commit data outside the Block. (TODO)

// NOTE: BlockStore methods will panic if they encounter errors // deserializing loaded data, indicating probable corruption on disk.

func NewBlockStore

func NewBlockStore(db dbm.DB) *BlockStore

NewBlockStore returns a new BlockStore with the given DB, initialized to the last height that was committed to the DB.

func (*BlockStore) GetReader

func (bs *BlockStore) GetReader(key []byte) io.Reader

GetReader returns the value associated with the given key wrapped in an io.Reader. If no value is found, it returns nil. It's mainly for use with wire.ReadBinary.

func (*BlockStore) Height

func (bs *BlockStore) Height() int64

Height returns the last known contiguous block height.

func (*BlockStore) LoadBlock

func (bs *BlockStore) LoadBlock(height int64) *types.Block

LoadBlock returns the block with the given height. If no block is found for that height, it returns nil.

func (*BlockStore) LoadBlockCommit

func (bs *BlockStore) LoadBlockCommit(height int64) *types.Commit

LoadBlockCommit returns the Commit for the given height. This commit consists of the +2/3 and other Precommit-votes for block at `height`, and it comes from the block.LastCommit for `height+1`. If no commit is found for the given height, it returns nil.

func (*BlockStore) LoadBlockMeta

func (bs *BlockStore) LoadBlockMeta(height int64) *types.BlockMeta

LoadBlockMeta returns the BlockMeta for the given height. If no block is found for the given height, it returns nil.

func (*BlockStore) LoadBlockPart

func (bs *BlockStore) LoadBlockPart(height int64, index int) *types.Part

LoadBlockPart returns the Part at the given index from the block at the given height. If no part is found for the given height and index, it returns nil.

func (*BlockStore) LoadSeenCommit

func (bs *BlockStore) LoadSeenCommit(height int64) *types.Commit

LoadSeenCommit returns the locally seen Commit for the given height. This is useful when we've seen a commit, but there has not yet been a new block at `height + 1` that includes this commit in its block.LastCommit.

func (*BlockStore) SaveBlock

func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit)

SaveBlock persists the given block, blockParts, and seenCommit to the underlying db. blockParts: Must be parts of the block seenCommit: The +2/3 precommits that were seen which committed at height.

If all the nodes restart after committing a block,
we need this to reload the precommits to catch-up nodes to the
most recent height.  Otherwise they'd stall at H-1.

type BlockStoreStateJSON

type BlockStoreStateJSON struct {
	Height int64
}

func LoadBlockStoreStateJSON

func LoadBlockStoreStateJSON(db dbm.DB) BlockStoreStateJSON

LoadBlockStoreStateJSON returns the BlockStoreStateJSON as loaded from disk. If no BlockStoreStateJSON was previously persisted, it returns the zero value.

func (BlockStoreStateJSON) Save

func (bsj BlockStoreStateJSON) Save(db dbm.DB)

Save persists the blockStore state to the database as JSON.

type BlockchainMessage

type BlockchainMessage interface{}

BlockchainMessage is a generic message for this reactor.

func DecodeMessage

func DecodeMessage(bz []byte, maxSize int) (msgType byte, msg BlockchainMessage, err error)

DecodeMessage decodes BlockchainMessage. TODO: ensure that bz is completely read.

type BlockchainReactor

type BlockchainReactor struct {
	p2p.BaseReactor
	// contains filtered or unexported fields
}

BlockchainReactor handles long-term catchup syncing.

func NewBlockchainReactor

func NewBlockchainReactor(state sm.State, blockExec *sm.BlockExecutor, store *BlockStore,
	fastSync bool) *BlockchainReactor

NewBlockchainReactor returns new reactor instance.

func (*BlockchainReactor) AddPeer

func (bcR *BlockchainReactor) AddPeer(peer p2p.Peer)

AddPeer implements Reactor by sending our state to peer.

func (*BlockchainReactor) BroadcastStatusRequest

func (bcR *BlockchainReactor) BroadcastStatusRequest() error

BroadcastStatusRequest broadcasts `BlockStore` height.

func (*BlockchainReactor) GetChannels

func (bcR *BlockchainReactor) GetChannels() []*p2p.ChannelDescriptor

GetChannels implements Reactor

func (*BlockchainReactor) OnStart

func (bcR *BlockchainReactor) OnStart() error

OnStart implements cmn.Service.

func (*BlockchainReactor) OnStop

func (bcR *BlockchainReactor) OnStop()

OnStop implements cmn.Service.

func (*BlockchainReactor) Receive

func (bcR *BlockchainReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte)

Receive implements Reactor by handling 4 types of messages (look below).

func (*BlockchainReactor) RemovePeer

func (bcR *BlockchainReactor) RemovePeer(peer p2p.Peer, reason interface{})

RemovePeer implements Reactor by removing peer from the pool.

func (*BlockchainReactor) SetLogger

func (bcR *BlockchainReactor) SetLogger(l log.Logger)

SetLogger implements cmn.Service by setting the logger on reactor and pool.