staking

package
v1.8.1-rc1 Latest Latest
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 Go to latest Published: Jun 14, 2022 License: Apache-2.0 Imports: 27 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// StakingCandidatesNamespace is a namespace to store candidates with epoch start height
	StakingCandidatesNamespace = "stakingCandidates"
	// StakingBucketsNamespace is a namespace to store vote buckets with epoch start height
	StakingBucketsNamespace = "stakingBuckets"
	// StakingMetaNamespace is a namespace to store metadata
	StakingMetaNamespace = "stakingMeta"
)
View Source 
const (
	HandleCreateStake       = "createStake"
	HandleUnstake           = "unstake"
	HandleWithdrawStake     = "withdrawStake"
	HandleChangeCandidate   = "changeCandidate"
	HandleTransferStake     = "transferStake"
	HandleDepositToStake    = "depositToStake"
	HandleRestake           = "restake"
	HandleCandidateRegister = "candidateRegister"
	HandleCandidateUpdate   = "candidateUpdate"
)

constants

View Source 
const (

	// StakingNameSpace is the bucket name for staking state
	StakingNameSpace = "Staking"

	// CandidateNameSpace is the bucket name for candidate state
	CandidateNameSpace = "Candidate"
)

Variables

View Source 
var (
	ErrWithdrawnBucket = errors.New("the bucket is already withdrawn")
	TotalBucketKey     = append([]byte{_const}, []byte("totalBucket")...)
)

Errors

View Source 
var (
	ErrInvalidAmount       = errors.New("invalid staking amount")
	ErrInvalidCanName      = errors.New("invalid candidate name")
	ErrInvalidOwner        = errors.New("invalid owner address")
	ErrInvalidOperator     = errors.New("invalid operator address")
	ErrInvalidReward       = errors.New("invalid reward address")
	ErrInvalidSelfStkIndex = errors.New("invalid self-staking bucket index")
	ErrMissingField        = errors.New("missing data field")
	ErrTypeAssertion       = errors.New("failed type assertion")
)

Errors

View Source 
var (
	ErrNilParameters = errors.New("parameter is nil")
)

Errors and vars

Functions

func AddrKeyWithPrefix added in v1.8.1 

func AddrKeyWithPrefix(addr address.Address, prefix byte) []byte

AddrKeyWithPrefix returns address key with prefix

func BucketIndexFromReceiptLog added in v1.0.0 

func BucketIndexFromReceiptLog(log *iotextypes.Log) (uint64, bool)

BucketIndexFromReceiptLog extracts bucket index from log

func ProtocolAddr added in v1.7.1 

func ProtocolAddr() address.Address

ProtocolAddr returns the address generated from protocol id

Types

type BucketGet added in v1.8.0 

type BucketGet interface {
	BucketGetByIndex
	// contains filtered or unexported methods
}

BucketGet related to obtaining bucket

type BucketGetByIndex added in v1.8.0 

type BucketGetByIndex interface {
	// contains filtered or unexported methods
}

BucketGetByIndex related to obtaining bucket by index

type BucketIndices 

type BucketIndices []uint64

BucketIndices defines the array of bucket index for a

func (*BucketIndices) Deserialize 

func (bis *BucketIndices) Deserialize(data []byte) error

Deserialize deserializes bytes into bucket indices

func (*BucketIndices) LoadProto 

func (bis *BucketIndices) LoadProto(bucketIndicesPb *stakingpb.BucketIndices) error

LoadProto converts protobuf to bucket indices

func (*BucketIndices) Proto 

func (bis *BucketIndices) Proto() *stakingpb.BucketIndices

Proto converts bucket indices to protobuf

func (*BucketIndices) Serialize 

func (bis *BucketIndices) Serialize() ([]byte, error)

Serialize serializes bucket indices into bytes

type BucketPool added in v1.1.0 

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

BucketPool implements the bucket pool

func (*BucketPool) Commit added in v1.1.0 

func (bp *BucketPool) Commit(sr protocol.StateReader) error

Commit is called upon workingset commit

func (*BucketPool) Copy added in v1.1.0 

func (bp *BucketPool) Copy(enableSMStorage bool) *BucketPool

Copy returns a copy of the bucket pool

func (*BucketPool) Count added in v1.1.0 

func (bp *BucketPool) Count() uint64

Count returns the total number of buckets in bucket pool

func (*BucketPool) CreditPool added in v1.1.0 

func (bp *BucketPool) CreditPool(sm protocol.StateManager, amount *big.Int) error

CreditPool subtracts staked amount out of the pool

func (*BucketPool) DebitPool added in v1.1.0 

func (bp *BucketPool) DebitPool(sm protocol.StateManager, amount *big.Int, newBucket bool) error

DebitPool adds staked amount into the pool

func (*BucketPool) Sync added in v1.1.0 

func (bp *BucketPool) Sync(sm protocol.StateManager) error

Sync syncs the data from state manager

func (*BucketPool) Total added in v1.1.0 

func (bp *BucketPool) Total() *big.Int

Total returns the total amount staked in bucket pool

type BucketSet added in v1.8.0 

type BucketSet interface {
	// contains filtered or unexported methods
}

BucketSet related to setting bucket

type Candidate 

type Candidate struct {
	Owner              address.Address
	Operator           address.Address
	Reward             address.Address
	Name               string
	Votes              *big.Int
	SelfStakeBucketIdx uint64
	SelfStake          *big.Int
}

Candidate represents the candidate

func (*Candidate) AddSelfStake 

func (d *Candidate) AddSelfStake(amount *big.Int) error

AddSelfStake adds self stake

func (*Candidate) AddVote 

func (d *Candidate) AddVote(amount *big.Int) error

AddVote adds vote

func (*Candidate) Clone 

func (d *Candidate) Clone() *Candidate

Clone returns a copy

func (*Candidate) Collision added in v1.0.0 

func (d *Candidate) Collision(c *Candidate) error

Collision checks collsion of 2 candidates

func (*Candidate) Deserialize 

func (d *Candidate) Deserialize(buf []byte) error

Deserialize deserializes bytes to candidate

func (*Candidate) Equal added in v1.0.0 

func (d *Candidate) Equal(c *Candidate) bool

Equal tests equality of 2 candidates

func (*Candidate) Serialize 

func (d *Candidate) Serialize() ([]byte, error)

Serialize serializes candidate to bytes

func (*Candidate) SubSelfStake 

func (d *Candidate) SubSelfStake(amount *big.Int) error

SubSelfStake subtracts self stake

func (*Candidate) SubVote 

func (d *Candidate) SubVote(amount *big.Int) error

SubVote subtracts vote

func (*Candidate) Validate added in v1.0.0 

func (d *Candidate) Validate() error

Validate does the sanity check

type CandidateCenter 

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

CandidateCenter is a struct to manage the candidates

func NewCandidateCenter 

func NewCandidateCenter(all CandidateList) (*CandidateCenter, error)

NewCandidateCenter creates an instance of CandidateCenter

func (*CandidateCenter) All 

func (m *CandidateCenter) All() CandidateList

All returns all candidates in candidate center

func (CandidateCenter) Base added in v1.0.0 

func (m CandidateCenter) Base() *CandidateCenter

Base returns the confirmed base state

func (*CandidateCenter) Commit added in v1.0.0 

func (m *CandidateCenter) Commit() error

Commit writes the change into base

func (*CandidateCenter) ContainsName 

func (m *CandidateCenter) ContainsName(name string) bool

ContainsName returns true if the map contains the candidate by name

func (*CandidateCenter) ContainsOperator 

func (m *CandidateCenter) ContainsOperator(operator address.Address) bool

ContainsOperator returns true if the map contains the candidate by operator

func (*CandidateCenter) ContainsOwner 

func (m *CandidateCenter) ContainsOwner(owner address.Address) bool

ContainsOwner returns true if the map contains the candidate by owner

func (*CandidateCenter) ContainsSelfStakingBucket 

func (m *CandidateCenter) ContainsSelfStakingBucket(index uint64) bool

ContainsSelfStakingBucket returns true if the map contains the self staking bucket index

func (*CandidateCenter) Delta added in v1.0.0 

func (m *CandidateCenter) Delta() CandidateList

Delta exports the pending changes

func (*CandidateCenter) GetByName 

func (m *CandidateCenter) GetByName(name string) *Candidate

GetByName returns the candidate by name

func (*CandidateCenter) GetByOwner 

func (m *CandidateCenter) GetByOwner(owner address.Address) *Candidate

GetByOwner returns the candidate by owner

func (*CandidateCenter) GetBySelfStakingIndex 

func (m *CandidateCenter) GetBySelfStakingIndex(index uint64) *Candidate

GetBySelfStakingIndex returns the candidate by self-staking index

func (*CandidateCenter) SetDelta added in v1.0.0 

func (m *CandidateCenter) SetDelta(l CandidateList) error

SetDelta sets the delta

func (*CandidateCenter) Size 

func (m *CandidateCenter) Size() int

Size returns number of candidates

func (*CandidateCenter) Sync added in v1.1.0 

func (m *CandidateCenter) Sync(sm protocol.StateManager) error

Sync syncs the data from state manager

func (*CandidateCenter) Upsert 

func (m *CandidateCenter) Upsert(d *Candidate) error

Upsert adds a candidate into map, overwrites if already exist

type CandidateGet added in v1.8.0 

type CandidateGet interface {
	// contains filtered or unexported methods
}

CandidateGet related to obtaining Candidate

type CandidateList 

type CandidateList []*Candidate

CandidateList is a list of candidates which is sortable

func (*CandidateList) Deserialize 

func (l *CandidateList) Deserialize(buf []byte) error

Deserialize deserializes bytes to list of candidates

func (CandidateList) Len 

func (l CandidateList) Len() int

func (CandidateList) Less 

func (l CandidateList) Less(i, j int) bool

func (CandidateList) Serialize added in v1.0.0 

func (l CandidateList) Serialize() ([]byte, error)

Serialize serializes candidate to bytes

func (CandidateList) Swap 

func (l CandidateList) Swap(i, j int)

type CandidateSet added in v1.8.0 

type CandidateSet interface {
	// contains filtered or unexported methods
}

CandidateSet related to setting candidates

type CandidateStateManager added in v1.0.0 

type CandidateStateManager interface {
	BucketSet
	BucketGetByIndex
	CandidateSet
	// candidate and bucket pool related
	DirtyView() *ViewData
	ContainsName(string) bool
	ContainsOwner(address.Address) bool
	ContainsOperator(address.Address) bool
	ContainsSelfStakingBucket(uint64) bool
	GetByName(string) *Candidate
	GetByOwner(address.Address) *Candidate
	GetBySelfStakingIndex(uint64) *Candidate
	Upsert(*Candidate) error
	CreditBucketPool(*big.Int) error
	DebitBucketPool(*big.Int, bool) error
	Commit() error
	SM() protocol.StateManager
}

CandidateStateManager is candidate state manager on top of StateManager

func NewCandidateStateManager added in v1.0.0 

func NewCandidateStateManager(sm protocol.StateManager, enableSMStorage bool) (CandidateStateManager, error)

NewCandidateStateManager returns a new CandidateStateManager instance

type CandidateStateReader added in v1.1.0 

type CandidateStateReader interface {
	BucketGet
	CandidateGet
	ReadState
	Height() uint64
	SR() protocol.StateReader
	BaseView() *ViewData
	NewBucketPool(enableSMStorage bool) (*BucketPool, error)
	GetCandidateByName(string) *Candidate
	GetCandidateByOwner(address.Address) *Candidate
	AllCandidates() CandidateList
	TotalStakedAmount() *big.Int
	ActiveBucketsCount() uint64
}

CandidateStateReader contains candidate center and bucket pool

func ConstructBaseView added in v1.1.0 

func ConstructBaseView(sr protocol.StateReader) (CandidateStateReader, error)

ConstructBaseView returns a candidate state reader that reflects the base view it will be used read-only

func GetStakingStateReader added in v1.1.0 

func GetStakingStateReader(sr protocol.StateReader) (CandidateStateReader, error)

GetStakingStateReader returns a candidate state reader that reflects the base view

type CandidatesBucketsIndexer added in v1.1.0 

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

CandidatesBucketsIndexer is an indexer to store candidates by given height

func NewStakingCandidatesBucketsIndexer added in v1.1.0 

func NewStakingCandidatesBucketsIndexer(kv db.KVStoreForRangeIndex) (*CandidatesBucketsIndexer, error)

NewStakingCandidatesBucketsIndexer creates a new StakingCandidatesIndexer

func (*CandidatesBucketsIndexer) GetBuckets added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) GetBuckets(height uint64, offset, limit uint32) ([]byte, uint64, error)

GetBuckets gets vote buckets from indexer given epoch start height

func (*CandidatesBucketsIndexer) GetCandidates added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) GetCandidates(height uint64, offset, limit uint32) ([]byte, uint64, error)

GetCandidates gets candidates from indexer given epoch start height

func (*CandidatesBucketsIndexer) PutBuckets added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) PutBuckets(height uint64, buckets *iotextypes.VoteBucketList) error

PutBuckets puts vote buckets into indexer

func (*CandidatesBucketsIndexer) PutCandidates added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) PutCandidates(height uint64, candidates *iotextypes.CandidateListV2) error

PutCandidates puts candidates into indexer

func (*CandidatesBucketsIndexer) Start added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) Start(ctx context.Context) error

Start starts the indexer

func (*CandidatesBucketsIndexer) Stop added in v1.1.0 

func (cbi *CandidatesBucketsIndexer) Stop(ctx context.Context) error

Stop stops the indexer

type Configuration 

type Configuration struct {
	VoteWeightCalConsts   genesis.VoteWeightCalConsts
	RegistrationConsts    RegistrationConsts
	WithdrawWaitingPeriod time.Duration
	MinStakeAmount        *big.Int
	BootstrapCandidates   []genesis.BootstrapCandidate
}

Configuration is the staking protocol configuration.

type DepositGas 

type DepositGas func(ctx context.Context, sm protocol.StateManager, amount *big.Int) (*action.TransactionLog, error)

DepositGas deposits gas to some pool

type Protocol 

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

Protocol defines the protocol of handling staking

func FindProtocol added in v1.8.0 

func FindProtocol(registry *protocol.Registry) *Protocol

FindProtocol return a registered protocol from registry

func NewProtocol 

func NewProtocol(depositGas DepositGas, cfg genesis.Staking, candBucketsIndexer *CandidatesBucketsIndexer, reviseHeights ...uint64) (*Protocol, error)

NewProtocol instantiates the protocol of staking

func (*Protocol) ActiveCandidates 

func (p *Protocol) ActiveCandidates(ctx context.Context, sr protocol.StateReader, height uint64) (state.CandidateList, error)

ActiveCandidates returns all active candidates in candidate center

func (*Protocol) Commit added in v1.0.0 

func (p *Protocol) Commit(ctx context.Context, sm protocol.StateManager) error

Commit commits the last change

func (*Protocol) CreateGenesisStates 

func (p *Protocol) CreateGenesisStates(
	ctx context.Context,
	sm protocol.StateManager,
) error

CreateGenesisStates is used to setup BootstrapCandidates from genesis config.

func (*Protocol) CreatePreStates added in v1.1.0 

func (p *Protocol) CreatePreStates(ctx context.Context, sm protocol.StateManager) error

CreatePreStates updates state manager

func (*Protocol) ForceRegister 

func (p *Protocol) ForceRegister(r *protocol.Registry) error

ForceRegister registers the protocol with a unique ID and force replacing the previous protocol if it exists

func (*Protocol) Handle 

func (p *Protocol) Handle(ctx context.Context, act action.Action, sm protocol.StateManager) (*action.Receipt, error)

Handle handles a staking message

func (*Protocol) Name added in v1.0.0 

func (p *Protocol) Name() string

Name returns the name of protocol

func (*Protocol) ReadState 

func (p *Protocol) ReadState(ctx context.Context, sr protocol.StateReader, method []byte, args ...[]byte) ([]byte, uint64, error)

ReadState read the state on blockchain via protocol

func (*Protocol) Register 

func (p *Protocol) Register(r *protocol.Registry) error

Register registers the protocol with a unique ID

func (*Protocol) Start 

func (p *Protocol) Start(ctx context.Context, sr protocol.StateReader) (interface{}, error)

Start starts the protocol

func (*Protocol) Validate 

func (p *Protocol) Validate(ctx context.Context, act action.Action, sr protocol.StateReader) error

Validate validates a staking message

type ReadState added in v1.8.0 

type ReadState interface {
	// contains filtered or unexported methods
}

ReadState related to read bucket and candidate by request

type ReceiptError added in v1.0.0 

type ReceiptError interface {
	Error() string
	ReceiptStatus() uint64
}

ReceiptError indicates a non-critical error with corresponding receipt status

type RegistrationConsts 

type RegistrationConsts struct {
	Fee          *big.Int
	MinSelfStake *big.Int
}

RegistrationConsts are the registration fee and min self stake

type ViewData added in v1.1.0 

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

ViewData is the data that need to be stored in protocol's view

func CreateBaseView added in v1.1.0 

func CreateBaseView(sr protocol.StateReader, enableSMStorage bool) (*ViewData, uint64, error)

CreateBaseView creates the base view from state reader

type VoteBucket 

type VoteBucket struct {
	Index            uint64
	Candidate        address.Address
	Owner            address.Address
	StakedAmount     *big.Int
	StakedDuration   time.Duration
	CreateTime       time.Time
	StakeStartTime   time.Time
	UnstakeStartTime time.Time
	AutoStake        bool
}

VoteBucket represents a vote

func NewVoteBucket 

func NewVoteBucket(cand, owner address.Address, amount *big.Int, duration uint32, ctime time.Time, autoStake bool) *VoteBucket

NewVoteBucket creates a new vote bucket

func (*VoteBucket) Deserialize 

func (vb *VoteBucket) Deserialize(buf []byte) error

Deserialize deserializes bytes into bucket

func (*VoteBucket) Serialize 

func (vb *VoteBucket) Serialize() ([]byte, error)

Serialize serializes bucket into bytes

type VoteReviser added in v1.1.0 

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

VoteReviser is used to recalculate candidate votes.

func NewVoteReviser added in v1.1.0 

func NewVoteReviser(c genesis.VoteWeightCalConsts, reviseHeights ...uint64) *VoteReviser

NewVoteReviser creates a VoteReviser.

func (*VoteReviser) NeedRevise added in v1.1.0 

func (vr *VoteReviser) NeedRevise(height uint64) bool

NeedRevise returns true if height needs revise

func (*VoteReviser) Revise added in v1.1.0 

func (vr *VoteReviser) Revise(csm CandidateStateManager, height uint64) error

Revise recalculate candidate votes on preset revising height.

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