validators

Documentation

Index

• Variables
• type Connector
• type GetValidatorOutput
• type Manager
  • func NewManager() Manager
• type ManagerCallbackListener
• type SetCallbackListener
  • func NewLogger(log logging.Logger, subnetID ids.ID, nodeIDs ...ids.NodeID) SetCallbackListener
• type State
  • func NewLockedState(lock sync.Locker, s State) State
  • func NewNoValidatorsState(state State) State
  • func Trace(s State, name string, tracer trace.Tracer) State
• type Validator

Variables

var (
	ErrZeroWeight        = errors.New("weight must be non-zero")
	ErrMissingValidators = errors.New("missing validators")
)

Types

type Connector

type Connector interface {
	Connected(
		ctx context.Context,
		nodeID ids.NodeID,
		nodeVersion *version.Application,
	) error
	Disconnected(ctx context.Context, nodeID ids.NodeID) error
}

Connector represents a handler that is called when a connection is marked as connected or disconnected

type GetValidatorOutput

type GetValidatorOutput struct {
	NodeID    ids.NodeID
	PublicKey *bls.PublicKey
	Weight    uint64
}

GetValidatorOutput is a struct that contains the publicly relevant values of a validator of the Avalanche Network for the output of GetValidator.

type Manager

type Manager interface {
	fmt.Stringer

	// Add a new staker to the subnet.
	// Returns an error if:
	// - [weight] is 0
	// - [nodeID] is already in the validator set
	// If an error is returned, the set will be unmodified.
	AddStaker(subnetID ids.ID, nodeID ids.NodeID, pk *bls.PublicKey, txID ids.ID, weight uint64) error

	// AddWeight to an existing staker to the subnet.
	// Returns an error if:
	// - [weight] is 0
	// - [nodeID] is not already in the validator set
	// If an error is returned, the set will be unmodified.
	// AddWeight can result in a total weight that overflows uint64.
	// In this case no error will be returned for this call.
	// However, the next TotalWeight call will return an error.
	AddWeight(subnetID ids.ID, nodeID ids.NodeID, weight uint64) error

	// GetWeight retrieves the validator weight from the subnet.
	GetWeight(subnetID ids.ID, nodeID ids.NodeID) uint64

	// GetValidator returns the validator tied to the specified ID in subnet.
	// If the validator doesn't exist, returns false.
	GetValidator(subnetID ids.ID, nodeID ids.NodeID) (*Validator, bool)

	// GetValidatorIDs returns the validator IDs in the subnet.
	GetValidatorIDs(subnetID ids.ID) []ids.NodeID

	// SubsetWeight returns the sum of the weights of the validators in the subnet.
	// Returns err if subset weight overflows uint64.
	SubsetWeight(subnetID ids.ID, validatorIDs set.Set[ids.NodeID]) (uint64, error)

	// RemoveWeight from a staker in the subnet. If the staker's weight becomes 0, the staker
	// will be removed from the subnet set.
	// Returns an error if:
	// - [weight] is 0
	// - [nodeID] is not already in the subnet set
	// - the weight of the validator would become negative
	// If an error is returned, the set will be unmodified.
	RemoveWeight(subnetID ids.ID, nodeID ids.NodeID, weight uint64) error

	// NumSubnets returns the number of subnets with non-zero weight.
	NumSubnets() int

	// NumValidators returns the number of validators currently in the subnet.
	NumValidators(subnetID ids.ID) int

	// TotalWeight returns the cumulative weight of all validators in the subnet.
	// Returns err if total weight overflows uint64.
	TotalWeight(subnetID ids.ID) (uint64, error)

	// Sample returns a collection of validatorIDs in the subnet, potentially with duplicates.
	// If sampling the requested size isn't possible, an error will be returned.
	Sample(subnetID ids.ID, size int) ([]ids.NodeID, error)

	// Map of the validators in this subnet
	GetMap(subnetID ids.ID) map[ids.NodeID]*GetValidatorOutput

	// When a validator is added, removed, or its weight changes, the listener
	// will be notified of the event.
	RegisterCallbackListener(listener ManagerCallbackListener)

	// When a validator is added, removed, or its weight changes on [subnetID],
	// the listener will be notified of the event.
	RegisterSetCallbackListener(subnetID ids.ID, listener SetCallbackListener)
}

Manager holds the validator set of each subnet

func NewManager

func NewManager() Manager

NewManager returns a new, empty manager

type ManagerCallbackListener

type ManagerCallbackListener interface {
	OnValidatorAdded(subnetID ids.ID, nodeID ids.NodeID, pk *bls.PublicKey, txID ids.ID, weight uint64)
	OnValidatorRemoved(subnetID ids.ID, nodeID ids.NodeID, weight uint64)
	OnValidatorWeightChanged(subnetID ids.ID, nodeID ids.NodeID, oldWeight, newWeight uint64)
}

type SetCallbackListener

type SetCallbackListener interface {
	OnValidatorAdded(nodeID ids.NodeID, pk *bls.PublicKey, txID ids.ID, weight uint64)
	OnValidatorRemoved(nodeID ids.NodeID, weight uint64)
	OnValidatorWeightChanged(nodeID ids.NodeID, oldWeight, newWeight uint64)
}

func NewLogger

func NewLogger(
	log logging.Logger,
	subnetID ids.ID,
	nodeIDs ...ids.NodeID,
) SetCallbackListener

NewLogger returns a callback listener that will log validator set changes for the specified validators

type State

type State interface {
	// GetMinimumHeight returns the minimum height of the block still in the
	// proposal window.
	GetMinimumHeight(context.Context) (uint64, error)
	// GetCurrentHeight returns the current height of the P-chain.
	GetCurrentHeight(context.Context) (uint64, error)

	// GetSubnetID returns the subnetID of the provided chain.
	GetSubnetID(ctx context.Context, chainID ids.ID) (ids.ID, error)

	// GetValidatorSet returns the validators of the provided subnet at the
	// requested P-chain height.
	// The returned map should not be modified.
	GetValidatorSet(
		ctx context.Context,
		height uint64,
		subnetID ids.ID,
	) (map[ids.NodeID]*GetValidatorOutput, error)
}

State allows the lookup of validator sets on specified subnets at the requested P-chain height.

func NewLockedState

func NewLockedState(lock sync.Locker, s State) State

func NewNoValidatorsState

func NewNoValidatorsState(state State) State

func Trace

func Trace(s State, name string, tracer trace.Tracer) State

type Validator

type Validator struct {
	NodeID    ids.NodeID
	PublicKey *bls.PublicKey
	TxID      ids.ID
	Weight    uint64
	// contains filtered or unexported fields
}

Validator is a struct that contains the base values representing a validator of the Avalanche Network.