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prep.go
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prep.go
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package icstate
import (
"bytes"
"math/big"
"sort"
"github.com/icon-project/goloop/common/errors"
"github.com/icon-project/goloop/icon/icmodule"
"github.com/icon-project/goloop/icon/iiss/icutils"
"github.com/icon-project/goloop/module"
)
type PRep struct {
owner module.Address
state *State
pb *PRepBaseState
*PRepStatusState
}
func (p *PRep) Owner() module.Address {
return p.owner
}
func (p *PRep) IRep() *big.Int {
pb := p.getPRepBaseState()
if pb == nil {
return new(big.Int)
}
return pb.IRep()
}
func (p *PRep) ToJSON(blockHeight int64, bondRequirement int64) map[string]interface{} {
pb := p.getPRepBaseState()
jso := icutils.MergeMaps(pb.ToJSON(p.owner), p.PRepStatusState.ToJSON(blockHeight, bondRequirement))
jso["address"] = p.owner
return jso
}
func (p *PRep) init() error {
ps := p.state.GetPRepStatusByOwner(p.owner, false)
if ps == nil {
return errors.Errorf("PRepStatus not found: %s", p.owner)
}
p.PRepStatusState = ps
return nil
}
func (p *PRep) getPRepBaseState() *PRepBaseState {
if p.pb == nil {
p.pb = p.state.GetPRepBaseByOwner(p.owner, false)
}
return p.pb
}
func (p *PRep) info() *PRepInfo {
pb := p.getPRepBaseState()
if pb == nil {
return nil
}
return pb.info()
}
func NewPRep(owner module.Address, state *State) *PRep {
prep := &PRep{owner: owner, state: state}
if err := prep.init(); err != nil {
return nil
}
return prep
}
// ===============================================================
type PRepSet interface {
OnTermEnd(revision, mainPRepCount, subPRepCount, extraMainPRepCount, limit int, br int64) error
GetPRepSize(grade Grade) int
Size() int
TotalBonded() *big.Int
TotalDelegated() *big.Int
GetTotalPower(br int64) *big.Int
GetPRepByIndex(i int) *PRep
ToPRepSnapshots(electedPRepCount int, br int64) PRepSnapshots
}
type prepsBase struct {
totalBonded *big.Int
totalDelegated *big.Int // total delegated amount of all active P-Reps
mainPReps int
subPReps int
orderedPReps []*PRep
}
// OnTermEnd initializes all prep status including grade on term end
func (p *prepsBase) OnTermEnd(revision, mainPRepCount, subPRepCount, extraMainPRepCount, limit int, br int64) error {
mainPReps := 0
subPReps := 0
electedPRepCount := mainPRepCount + subPRepCount
var newGrade Grade
for i, prep := range p.orderedPReps {
if i < mainPRepCount {
newGrade = GradeMain
mainPReps++
} else if i < mainPRepCount+extraMainPRepCount && prep.GetPower(br).Sign() > 0 {
// Prevent a prep with 0 power from being an extra main prep
newGrade = GradeMain
mainPReps++
} else if i < electedPRepCount {
newGrade = GradeSub
subPReps++
} else {
newGrade = GradeCandidate
}
if err := prep.OnTermEnd(newGrade, limit); err != nil {
return err
}
if revision == icmodule.RevisionResetPenaltyMask {
prep.ResetVPenaltyMask()
}
}
p.mainPReps = mainPReps
p.subPReps = subPReps
return nil
}
func (p *prepsBase) GetPRepSize(grade Grade) int {
switch grade {
case GradeMain:
return p.mainPReps
case GradeSub:
return p.subPReps
case GradeCandidate:
return p.Size() - p.mainPReps - p.subPReps
default:
panic(errors.Errorf("Invalid grade: %d", grade))
}
}
func (p *prepsBase) Size() int {
return len(p.orderedPReps)
}
func (p *prepsBase) TotalBonded() *big.Int {
return p.totalBonded
}
func (p *prepsBase) TotalDelegated() *big.Int {
return p.totalDelegated
}
func (p *prepsBase) GetTotalPower(br int64) *big.Int {
totalPower := new(big.Int)
for _, prep := range p.orderedPReps {
totalPower.Add(totalPower, prep.GetPower(br))
}
return totalPower
}
func (p *prepsBase) GetPRepByIndex(i int) *PRep {
if i < 0 || i >= len(p.orderedPReps) {
return nil
}
return p.orderedPReps[i]
}
func (p *prepsBase) ToPRepSnapshots(electedPRepCount int, br int64) PRepSnapshots {
size := icutils.Min(len(p.orderedPReps), electedPRepCount)
if size == 0 {
return nil
}
ret := make(PRepSnapshots, size)
for i := 0; i < size; i++ {
prep := p.orderedPReps[i]
ret[i] = NewPRepSnapshot(prep.Owner(), prep.GetPower(br))
}
return ret
}
func (p *prepsBase) appendPRep(prep *PRep) {
if prep.PRepStatusState.Status() == Active {
p.orderedPReps = append(p.orderedPReps, prep)
p.totalBonded.Add(p.totalBonded, prep.Bonded())
p.totalDelegated.Add(p.totalDelegated, prep.Delegated())
p.adjustPRepSize(prep.Grade(), true)
}
}
func (p *prepsBase) adjustPRepSize(grade Grade, increment bool) {
delta := 1
if !increment {
delta = -1
}
switch grade {
case GradeMain:
p.mainPReps += delta
case GradeSub:
p.subPReps += delta
case GradeCandidate:
// Nothing to do
default:
panic(errors.Errorf("Invalid grade: %d", grade))
}
}
func (p *prepsBase) sortByPower(br int64) {
sort.Slice(p.orderedPReps, func(i, j int) bool {
p0, p1 := p.orderedPReps[i], p.orderedPReps[j]
return lessByPower(p0, p1, br)
})
}
func lessByPower(p0, p1 *PRep, br int64) bool {
ret := p0.GetPower(br).Cmp(p1.GetPower(br))
if ret > 0 {
return true
} else if ret < 0 {
return false
}
ret = p0.Delegated().Cmp(p1.Delegated())
if ret > 0 {
return true
} else if ret < 0 {
return false
}
return bytes.Compare(p0.Owner().Bytes(), p1.Owner().Bytes()) > 0
}
// ======================================================================
func NewPRepsOrderedByPower(prepList []*PRep, br int64) PRepSet {
preps := &prepsBase{
totalDelegated: new(big.Int),
totalBonded: new(big.Int),
}
for _, prep := range prepList {
preps.appendPRep(prep)
}
preps.sortByPower(br)
return preps
}
// ================================================================
type prepsIncludingExtraMainPRep struct {
prepsBase
}
func (p *prepsIncludingExtraMainPRep) sort(
mainPRepCount, subPRepCount, extraMainPRepCount int, br int64) {
p.sortByPower(br)
p.sortForExtraMainPRep(mainPRepCount, subPRepCount, extraMainPRepCount, br)
}
func (p *prepsIncludingExtraMainPRep) sortForExtraMainPRep(
mainPRepCount, subPRepCount, extraMainPRepCount int, br int64) {
// All counts are configuration values; Default: 22, 78, 3
size := len(p.orderedPReps)
if size <= mainPRepCount || extraMainPRepCount == 0 {
// Not enough number of active preps to be extra main preps
return
}
electedPRepCount := mainPRepCount + subPRepCount
if electedPRepCount > size {
electedPRepCount = size
}
// extraMainPRepCount MUST be larger than zero
subPRepCount = size - mainPRepCount
if subPRepCount < extraMainPRepCount {
extraMainPRepCount = subPRepCount
}
// Copy sub preps from orderedPReps to subPReps
subPReps := p.orderedPReps[mainPRepCount:electedPRepCount]
dupSubPReps := make([]*PRep, len(subPReps))
copy(dupSubPReps, subPReps)
// Sort subPReps by LRU logic
sortByLRU(subPReps, br)
// Add extra main preps to map
extraMainPReps := make(map[string]*PRep)
for _, prep := range subPReps {
if prep.GetPower(br).Sign() > 0 {
// Prevent the prep whose power is 0 from being an extra main prep
extraMainPReps[icutils.ToKey(prep.Owner())] = prep
if len(extraMainPReps) == extraMainPRepCount {
// All extra main preps are selected
break
}
}
}
// Append remaining sub preps excluding extra main preps
i := len(extraMainPReps)
for _, prep := range dupSubPReps {
// If prep is not an extra main prep
if _, ok := extraMainPReps[icutils.ToKey(prep.Owner())]; !ok {
subPReps[i] = prep
i++
}
}
}
func sortByLRU(preps []*PRep, br int64) {
sort.Slice(preps, func(i, j int) bool {
return lessByLRU(preps[i], preps[j], br)
})
}
func lessByLRU(p0, p1 *PRep, br int64) bool {
// Sort by lastState
if p0.LastState() == None {
if p1.LastState() != None {
return true
}
} else {
if p1.LastState() == None {
return false
}
}
// p0 and p1 have the same last states at this moment
// Sort by lastHeight
if p0.LastState() == None && p0.LastHeight() != p1.LastHeight() {
return p0.LastHeight() < p1.LastHeight()
}
// Sort by power
cmp := p0.GetPower(br).Cmp(p1.GetPower(br))
if cmp == 0 {
// Sort by address
return bytes.Compare(p0.Owner().Bytes(), p1.Owner().Bytes()) > 0
}
return cmp > 0
}
// mainPRepCount does not include extraMainPRepCount
// Example: mainPRepCount: 22, subPRepCount: 78, extraMainPRepCount: 3
func NewPRepsIncludingExtraMainPRep(
prepList []*PRep, mainPRepCount, subPRepCount, extraMainPRepCount int, br int64) PRepSet {
preps := &prepsIncludingExtraMainPRep{
prepsBase: prepsBase{
totalDelegated: new(big.Int),
totalBonded: new(big.Int),
},
}
for _, prep := range prepList {
preps.appendPRep(prep)
}
preps.sort(mainPRepCount, subPRepCount, extraMainPRepCount, br)
return preps
}