consensus

package
v0.0.0-...-2c813a9 Latest Latest
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 Go to latest Published: Jan 12, 2021 License: MIT Imports: 17 Imported by: 0

Documentation

Index

Constants

View Source 
const DefaultBlockIntervalSec = int64(10)

DefaultBlockIntervalSec is the default block generation interval in seconds.

Variables

View Source 
var (
	// BlockIntervalSec is the block genration interval in seconds.
	BlockIntervalSec = DefaultBlockIntervalSec

	// BlockInterval is the maximum block generation time limit.
	BlockInterval = time.Second * time.Duration(DefaultBlockIntervalSec)
)
View Source 
var (
	WalEntryType_name = map[EntryType]string{
		0: "EntryBlock",
		1: "EntryEmpty",
		2: "EntryConfChange",
	}

	ErrInvalidMemberID        = errors.New("member id of conf change doesn't match")
	ErrEmptySnapData          = errors.New("failed to decode snapshot data. encoded data is empty")
	ErrInvalidMemberAttr      = errors.New("invalid member attribute")
	ErrorMembershipChangeSkip = errors.New("node is not raft leader, so skip membership change request")
)
View Source 
var ConsensusName = []string{"dpos", "raft", "sbp"}
View Source 
var ConsensusTypes = map[string]ConsensusType{"dpos": ConsensusDPOS, "raft": ConsensusRAFT, "sbp": ConsensusSBP}
View Source 
var (
	ErrNotSupportedMethod = errors.New("not supported metehod in this consensus")
)
View Source 
var IllegalArgumentError = errors.New("illegal argument")

Functions

func ConfStateToString 

func ConfStateToString(conf *raftpb.ConfState) string

func InitBlockInterval 

func InitBlockInterval(blockIntervalSec int64)

InitBlockInterval initializes block interval parameters.

func IsDposName 

func IsDposName(consensus string) bool

func IsRaftName 

func IsRaftName(consensus string) bool

func SetCurConsensus 

func SetCurConsensus(consensus string)

func SnapToString 

func SnapToString(snap *raftpb.Snapshot, snapd *SnapshotData) string

func Start 

func Start(c Consensus)

Start run a selected consesus service.

func Stop 

func Stop(c Consensus)

Stop shutdown consensus service.

func UseDpos 

func UseDpos() bool

func UseRaft 

func UseRaft() bool

Types

type BlockFactory 

type BlockFactory interface {
	Start()
	JobQueue() chan<- interface{}
}

BlockFactory is an interface for a block factory implementation.

type ChainConsensus 

type ChainConsensus interface {
	ChainConsensusCluster

	GetType() ConsensusType
	IsTransactionValid(tx *types.Tx) bool
	VerifyTimestamp(block *types.Block) bool
	VerifySign(block *types.Block) error
	IsBlockValid(block *types.Block, bestBlock *types.Block) error
	Update(block *types.Block)
	Save(tx TxWriter) error
	NeedReorganization(rootNo types.BlockNo) bool
	NeedNotify() bool
	HasWAL() bool // if consensus has WAL, block has already written in db
	IsConnectedBlock(block *types.Block) bool
	IsForkEnable() bool
	Info() string
}

ChainConsensus includes chainstatus and validation API.

type ChainConsensusCluster 

type ChainConsensusCluster interface {
	MakeConfChangeProposal(req *types.MembershipChange) (*ConfChangePropose, error)
}

type ChainDB 

type ChainDB interface {
	GetBestBlock() (*types.Block, error)
	GetBlockByNo(blockNo types.BlockNo) (*types.Block, error)
	GetHashByNo(blockNo types.BlockNo) ([]byte, error)
	GetBlock(hash []byte) (*types.Block, error)
	GetGenesisInfo() *types.Genesis
	Get(key []byte) []byte
	NewTx() db.Transaction
}

ChainDB is a reader interface for the ChainDB.

type ChainSnapshot 

type ChainSnapshot struct {
	No   types.BlockNo `json:"no"`
	Hash []byte        `json:"hash"`
}

func NewChainSnapshot 

func NewChainSnapshot(block *types.Block) *ChainSnapshot

func (*ChainSnapshot) Equal 

func (csnap *ChainSnapshot) Equal(other *ChainSnapshot) bool

func (*ChainSnapshot) ToString 

func (csnap *ChainSnapshot) ToString() string

type ChainWAL 

type ChainWAL interface {
	ChainDB

	ClearWAL()
	ResetWAL(hardStateInfo *types.HardStateInfo) error
	WriteRaftEntry([]*WalEntry, []*types.Block, []*raftpb.ConfChange) error
	GetRaftEntry(idx uint64) (*WalEntry, error)
	HasWal(identity RaftIdentity) (bool, error)
	GetRaftEntryOfBlock(hash []byte) (*WalEntry, error)
	GetRaftEntryLastIdx() (uint64, error)
	GetRaftEntryIndexOfBlock(hash []byte) (uint64, error)
	GetHardState() (*raftpb.HardState, error)
	WriteHardState(hardstate *raftpb.HardState) error
	WriteSnapshot(snap *raftpb.Snapshot) error
	GetSnapshot() (*raftpb.Snapshot, error)
	WriteIdentity(id *RaftIdentity) error
	GetIdentity() (*RaftIdentity, error)
	WriteConfChangeProgress(id uint64, progress *types.ConfChangeProgress) error
	GetConfChangeProgress(id uint64) (*types.ConfChangeProgress, error)
}

type ConfChangePropose 

type ConfChangePropose struct {
	Ctx context.Context
	Cc  *raftpb.ConfChange

	ReplyC chan *ConfChangeReply
}

type ConfChangeReply 

type ConfChangeReply struct {
	Member *Member
	Err    error
}

type Consensus 

type Consensus interface {
	ChainConsensus
	ConsensusAccessor
	Ticker() *time.Ticker
	QueueJob(now time.Time, jq chan<- interface{})
	BlockFactory() BlockFactory
	QuitChan() chan interface{}
}

Consensus is an interface for a consensus implementation.

type ConsensusAccessor 

type ConsensusAccessor interface {
	ConsensusInfo() *types.ConsensusInfo
	ClusterInfo([]byte) *types.GetClusterInfoResponse
	ConfChange(req *types.MembershipChange) (*Member, error)
	ConfChangeInfo(requestID uint64) (*types.ConfChangeProgress, error)
	// RaftAccessor returns MeyCoinRaftAccessor. It is only valid if chain is raft consensus
	RaftAccessor() MeyCoinRaftAccessor
}

type ConsensusType 

type ConsensusType int
const (
	ConsensusDPOS ConsensusType = iota
	ConsensusRAFT
	ConsensusSBP
)
var CurConsensusType ConsensusType

type Constructor 

type Constructor func() (Consensus, error)

Constructor represents a function returning the Consensus interfactor for each implementation.

type DummyRaftAccessor 

type DummyRaftAccessor struct {
}

DummyRaftAccessor returns error if process request comes, or silently ignore raft message.

func (DummyRaftAccessor) GetMemberByID 

func (DummyRaftAccessor) GetMemberByID(id uint64) *Member

func (DummyRaftAccessor) GetMemberByPeerID 

func (DummyRaftAccessor) GetMemberByPeerID(peerID types.PeerID) *Member

func (DummyRaftAccessor) IsIDRemoved 

func (DummyRaftAccessor) IsIDRemoved(peerID types.PeerID) bool

func (DummyRaftAccessor) Process 

func (DummyRaftAccessor) Process(ctx context.Context, peerID types.PeerID, m raftpb.Message) error

func (DummyRaftAccessor) ReportSnapshot 

func (DummyRaftAccessor) ReportSnapshot(peerID types.PeerID, status raft.SnapshotStatus)

func (DummyRaftAccessor) ReportUnreachable 

func (DummyRaftAccessor) ReportUnreachable(peerID types.PeerID)

func (DummyRaftAccessor) SaveFromRemote 

func (DummyRaftAccessor) SaveFromRemote(r io.Reader, id uint64, msg raftpb.Message) (int64, error)

type EntryType 

type EntryType int8
const (
	EntryBlock EntryType = iota
	EntryEmpty           // it is generated when node becomes leader
	EntryConfChange
	InvalidMemberID = 0
)

type ErrorConsensus 

type ErrorConsensus struct {
	Msg string
	Err error
}

ErrorConsensus is a basic error struct for consensus modules.

func (ErrorConsensus) Error 

func (e ErrorConsensus) Error() string

type Info 

type Info struct {
	Type   string
	Status *json.RawMessage `json:",omitempty"`
}

Info represents an information for a consensus implementation.

func NewInfo 

func NewInfo(name string) *Info

NewInfo returns a new Info with name.

func (*Info) AsJSON 

func (i *Info) AsJSON() string

AsJSON() returns i as a JSON string

type Member 

type Member struct {
	types.MemberAttr
}

func NewMember 

func NewMember(name string, address string, peerID types.PeerID, chainID []byte, when int64) *Member

func (*Member) CalculateMemberID 

func (m *Member) CalculateMemberID(chainID []byte, curTimestamp int64)

func (*Member) Clone 

func (m *Member) Clone() *Member

func (*Member) Equal 

func (m *Member) Equal(other *Member) bool

func (*Member) GetPeerID 

func (m *Member) GetPeerID() types.PeerID

func (*Member) HasDuplicatedAttr 

func (m *Member) HasDuplicatedAttr(x *Member) bool

func (*Member) IsCompatible 

func (m *Member) IsCompatible(other *Member) bool

IsCompatible checks if name, url and peerid of this member are the same with other member

func (*Member) IsValid 

func (m *Member) IsValid() bool

func (*Member) SetAttr 

func (m *Member) SetAttr(attr *types.MemberAttr)

func (*Member) SetMemberID 

func (m *Member) SetMemberID(id uint64)

func (*Member) ToString 

func (m *Member) ToString() string

type MembersByName 

type MembersByName []*Member

func (MembersByName) Len 

func (mbrs MembersByName) Len() int

func (MembersByName) Less 

func (mbrs MembersByName) Less(i, j int) bool

func (MembersByName) Swap 

func (mbrs MembersByName) Swap(i, j int)

type MeyCoinRaftAccessor 

type MeyCoinRaftAccessor interface {
	Process(ctx context.Context, peerID types.PeerID, m raftpb.Message) error
	IsIDRemoved(peerID types.PeerID) bool
	ReportUnreachable(peerID types.PeerID)
	ReportSnapshot(peerID types.PeerID, status raft.SnapshotStatus)

	SaveFromRemote(r io.Reader, id uint64, msg raftpb.Message) (int64, error)

	GetMemberByID(id uint64) *Member
	GetMemberByPeerID(peerID types.PeerID) *Member
}

MeyCoinRaftAccessor is interface to access raft messaging. It is wrapping raft message with meycoin internal types

type RaftIdentity 

type RaftIdentity struct {
	ClusterID uint64
	ID        uint64
	Name      string
	PeerID    string // base58 encoded format
}

func (*RaftIdentity) ToString 

func (rid *RaftIdentity) ToString() string

type SnapshotData 

type SnapshotData struct {
	Chain          ChainSnapshot `json:"chain"`
	Members        []*Member     `json:"members"`
	RemovedMembers []*Member
}

func NewSnapshotData 

func NewSnapshotData(members []*Member, rmMembers []*Member, block *types.Block) *SnapshotData

func (*SnapshotData) Decode 

func (snapd *SnapshotData) Decode(data []byte) error

func (*SnapshotData) Encode 

func (snapd *SnapshotData) Encode() ([]byte, error)

func (*SnapshotData) Equal 

func (snapd *SnapshotData) Equal(t *SnapshotData) bool

func (*SnapshotData) ToString 

func (snapd *SnapshotData) ToString() string

type TxWriter 

type TxWriter interface {
	Set(key, value []byte)
}

type WalEntry 

type WalEntry struct {
	Type  EntryType
	Term  uint64
	Index uint64
	Data  []byte // hash is set if Type is EntryBlock
}

func (*WalEntry) ToBytes 

func (we *WalEntry) ToBytes() ([]byte, error)

func (*WalEntry) ToString 

func (we *WalEntry) ToString() string

Source Files

View all Source files

Directories

Path Synopsis
dpos
dpos/bp
dpos/slot
raftv2
sbp

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