forked from ava-labs/avalanchego
/
manager.go
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/
manager.go
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// Copyright (C) 2019-2022, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package validators
import (
"fmt"
"strings"
"sync"
"github.com/dim4egster/qmallgo/ids"
)
var _ Manager = &manager{}
// Manager holds the validator set of each subnet
type Manager interface {
fmt.Stringer
// Set a subnet's validator set
Set(ids.ID, Set) error
// AddWeight adds weight to a given validator on the given subnet
AddWeight(ids.ID, ids.NodeID, uint64) error
// RemoveWeight removes weight from a given validator on a given subnet
RemoveWeight(ids.ID, ids.NodeID, uint64) error
// GetValidators returns the validator set for the given subnet
// Returns false if the subnet doesn't exist
GetValidators(ids.ID) (Set, bool)
// MaskValidator hides the named validator from future samplings
MaskValidator(ids.NodeID) error
// RevealValidator ensures the named validator is not hidden from future
// samplings
RevealValidator(ids.NodeID) error
// Contains returns true if there is a validator with the specified ID
// currently in the set.
Contains(ids.ID, ids.NodeID) bool
}
// NewManager returns a new, empty manager
func NewManager() Manager {
return &manager{
subnetToVdrs: make(map[ids.ID]Set),
}
}
type manager struct {
lock sync.RWMutex
// Key: Subnet ID
// Value: The validators that validate the subnet
subnetToVdrs map[ids.ID]Set
maskedVdrs ids.NodeIDSet
}
func (m *manager) Set(subnetID ids.ID, newSet Set) error {
m.lock.Lock()
defer m.lock.Unlock()
oldSet, exists := m.subnetToVdrs[subnetID]
if !exists {
m.subnetToVdrs[subnetID] = newSet
return nil
}
return oldSet.Set(newSet.List())
}
func (m *manager) AddWeight(subnetID ids.ID, vdrID ids.NodeID, weight uint64) error {
m.lock.Lock()
defer m.lock.Unlock()
vdrs, ok := m.subnetToVdrs[subnetID]
if !ok {
vdrs = NewSet()
for _, maskedVdrID := range m.maskedVdrs.List() {
if err := vdrs.MaskValidator(maskedVdrID); err != nil {
return err
}
}
m.subnetToVdrs[subnetID] = vdrs
}
return vdrs.AddWeight(vdrID, weight)
}
func (m *manager) RemoveWeight(subnetID ids.ID, vdrID ids.NodeID, weight uint64) error {
m.lock.Lock()
defer m.lock.Unlock()
if vdrs, ok := m.subnetToVdrs[subnetID]; ok {
return vdrs.RemoveWeight(vdrID, weight)
}
return nil
}
func (m *manager) GetValidators(subnetID ids.ID) (Set, bool) {
m.lock.RLock()
defer m.lock.RUnlock()
vdrs, ok := m.subnetToVdrs[subnetID]
return vdrs, ok
}
func (m *manager) MaskValidator(vdrID ids.NodeID) error {
m.lock.Lock()
defer m.lock.Unlock()
if m.maskedVdrs.Contains(vdrID) {
return nil
}
m.maskedVdrs.Add(vdrID)
for _, vdrs := range m.subnetToVdrs {
if err := vdrs.MaskValidator(vdrID); err != nil {
return err
}
}
return nil
}
func (m *manager) RevealValidator(vdrID ids.NodeID) error {
m.lock.Lock()
defer m.lock.Unlock()
if !m.maskedVdrs.Contains(vdrID) {
return nil
}
m.maskedVdrs.Remove(vdrID)
for _, vdrs := range m.subnetToVdrs {
if err := vdrs.RevealValidator(vdrID); err != nil {
return err
}
}
return nil
}
func (m *manager) Contains(subnetID ids.ID, vdrID ids.NodeID) bool {
m.lock.RLock()
defer m.lock.RUnlock()
vdrs, ok := m.subnetToVdrs[subnetID]
if ok {
return vdrs.Contains(vdrID)
}
return false
}
func (m *manager) String() string {
m.lock.RLock()
defer m.lock.RUnlock()
subnets := make([]ids.ID, 0, len(m.subnetToVdrs))
for subnetID := range m.subnetToVdrs {
subnets = append(subnets, subnetID)
}
ids.SortIDs(subnets)
sb := strings.Builder{}
sb.WriteString(fmt.Sprintf("Validator Manager: (Size = %d)",
len(subnets),
))
for _, subnetID := range subnets {
vdrs := m.subnetToVdrs[subnetID]
sb.WriteString(fmt.Sprintf(
"\n Subnet[%s]: %s",
subnetID,
vdrs.PrefixedString(" "),
))
}
return sb.String()
}