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validatormanager.go
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validatormanager.go
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package iiss
import (
"container/list"
"fmt"
"github.com/icon-project/goloop/common/errors"
"github.com/icon-project/goloop/common/log"
"github.com/icon-project/goloop/icon/iiss/icstate"
"github.com/icon-project/goloop/icon/iiss/icutils"
"github.com/icon-project/goloop/module"
"github.com/icon-project/goloop/service/state"
)
type ValidatorItemIterator interface {
Has() bool
Next() error
Get() (*ValidatorItem, error)
}
type ValidatorItem struct {
v module.Validator
added bool
}
func (vi *ValidatorItem) Address() module.Address {
return vi.v.Address()
}
func (vi *ValidatorItem) IsAdded() bool {
return vi.added
}
func (vi *ValidatorItem) ResetFlags() {
vi.added = false
}
func validatorFromAddress(a module.Address, added bool) (*ValidatorItem, error) {
if a == nil {
return nil, errors.ErrIllegalArgument
}
if a.IsContract() {
return nil, errors.ErrIllegalArgument
}
v, err := state.ValidatorFromAddress(a)
if err != nil {
return nil, err
}
return &ValidatorItem{
added: added,
v: v,
}, nil
}
type ValidatorManager struct {
icutils.Immutable
updated bool
pssIdx int // The index of next validator candidate in term
vlist *list.List
vmap map[string]*list.Element
}
func (vm *ValidatorManager) Hash() []byte {
return nil
}
func (vm *ValidatorManager) Bytes() []byte {
return nil
}
func (vm *ValidatorManager) Flush() error {
return nil
}
func (vm *ValidatorManager) IndexOf(address module.Address) int {
i := 0
for e := vm.vlist.Front(); e != nil; e = e.Next() {
vi := e.Value.(*ValidatorItem)
if address.Equal(vi.Address()) {
return i
}
i++
}
return -1
}
func (vm *ValidatorManager) Len() int {
return vm.vlist.Len()
}
func (vm *ValidatorManager) PRepSnapshotIndex() int {
return vm.pssIdx
}
func (vm *ValidatorManager) SetPRepSnapshotIndex(idx int) {
vm.pssIdx = idx
}
func (vm *ValidatorManager) Get(idx int) (*ValidatorItem, bool) {
size := vm.Len()
if idx < 0 || idx > size {
return nil, false
}
e := vm.vlist.Front()
for i := 0; i < idx; i++ {
e = e.Next()
}
return e.Value.(*ValidatorItem), true
}
func (vm *ValidatorManager) IsUpdated() bool {
return vm.updated
}
func (vm *ValidatorManager) SetUpdated(on bool) {
vm.updated = on
}
func (vm *ValidatorManager) ResetUpdated() {
vm.updated = false
}
func (vm *ValidatorManager) Add(node module.Address) error {
return vm.add(node, true)
}
func (vm *ValidatorManager) add(node module.Address, added bool) error {
if err := vm.checkWritable(); err != nil {
return err
}
if node == nil {
return errors.Errorf("Node address is nil")
}
key := icutils.ToKey(node)
if _, ok := vm.vmap[key]; ok {
return nil
}
v, err := validatorFromAddress(node, added)
if err != nil {
return err
}
e := vm.vlist.PushBack(v)
vm.vmap[key] = e
if added {
vm.updated = true
}
return nil
}
// Replace is used for node address change
func (vm *ValidatorManager) Replace(oldNode, newNode module.Address) error {
key := icutils.ToKey(oldNode)
e, ok := vm.vmap[key]
if !ok {
return errors.Errorf("Node not found: %s", oldNode)
}
_, ok = vm.vmap[icutils.ToKey(newNode)]
if ok {
return errors.Errorf("Node already in use: %s", newNode)
}
v, err := validatorFromAddress(newNode, false)
if err != nil {
return err
}
e.Value = v
vm.updated = true
return nil
}
func (vm *ValidatorManager) Remove(node module.Address) error {
if err := vm.checkWritable(); err != nil {
return err
}
key := icutils.ToKey(node)
e, ok := vm.vmap[key]
if !ok {
return errors.Errorf("Node not found: %s", node)
}
vm.vlist.Remove(e)
delete(vm.vmap, key)
vm.updated = true
return nil
}
func (vm *ValidatorManager) Clear() error {
if vm.Len() > 0 {
vm.pssIdx = 0
vm.vlist = vm.vlist.Init()
vm.vmap = make(map[string]*list.Element)
vm.updated = false
}
return nil
}
func (vm *ValidatorManager) GetValidators() ([]module.Validator, error) {
size := vm.Len()
vs := make([]module.Validator, size, size)
e := vm.vlist.Front()
for i := 0; i < size; i++ {
vs[i] = e.Value.(*ValidatorItem).v
e = e.Next()
}
return vs, nil
}
func (vm *ValidatorManager) Init(pm *PRepManager, term *icstate.Term) error {
if vm.Len() > 0 {
return errors.Errorf("ValidatorManager is not empty")
}
return vm.load(pm, term, false)
}
func (vm *ValidatorManager) Load(pm *PRepManager, term *icstate.Term) error {
return vm.load(pm, term, true)
}
func (vm *ValidatorManager) load(pm *PRepManager, term *icstate.Term, added bool) error {
if err := vm.checkWritable(); err != nil {
return err
}
mainPReps := pm.GetPRepSize(icstate.Main)
vLen := vm.Len()
if vLen == mainPReps {
return nil
}
if vLen > mainPReps {
return errors.Errorf("Invalid validators: validators(%d) > mainPReps(%d)", vLen, mainPReps)
}
pssCount := term.GetPRepSnapshotCount()
for i := vm.pssIdx; i < pssCount; i++ {
pss := term.GetPRepSnapshotByIndex(i)
prep := pm.GetPRepByOwner(pss.Owner())
if prep == nil {
log.Infof("PRep not found in ValidatorManager: %s", pss.Owner())
continue
}
if prep.Grade() == icstate.Main {
if err := vm.add(prep.GetNode(), added); err != nil {
return err
}
if vm.Len() == mainPReps {
vm.pssIdx = i + 1
break
}
}
}
if vm.Len() != mainPReps {
return errors.Errorf("Invalid validators: validators(%d) != mainPReps(%d)", vLen, mainPReps)
}
return nil
}
func (vm *ValidatorManager) checkWritable() error {
if vm.IsReadonly() {
return errors.Errorf("Writing is not allowed: %v", vm)
}
return nil
}
func (vm *ValidatorManager) String() string {
return fmt.Sprintf("ValidatorManager: size=%d", vm.Len())
}
type viIterator struct {
e *list.Element
}
func (vii *viIterator) Has() bool {
return vii.e != nil
}
func (vii *viIterator) Next() error {
vii.e = vii.e.Next()
if vii.e == nil {
return errors.Errorf("Stop iteration")
}
return nil
}
func (vii *viIterator) Get() (*ValidatorItem, error) {
if vii.e == nil {
return nil, errors.Errorf("Invalid value")
}
return vii.e.Value.(*ValidatorItem), nil
}
func (vm *ValidatorManager) Iterator() *viIterator {
return &viIterator{
e: vm.vlist.Front(),
}
}
func NewValidatorManager() *ValidatorManager {
return &ValidatorManager{
vlist: list.New(),
vmap: make(map[string]*list.Element),
}
}