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bakers.go
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bakers.go
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package services
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"sort"
"github.com/everstake/teztracker/models"
"github.com/shopspring/decimal"
)
const (
PreservedCycles = 5
XTZ = 1000000
GranadaBlockSecurityDeposit = 640 * XTZ
FlorenceBlockSecurityDeposit = 512 * XTZ
GranadaEndorsementSecurityDeposit = 2.5 * XTZ
FlorenceEndorsementSecurityDeposit = 64 * XTZ
GranadaBlockReward = 20 * XTZ
FlorenceBlockReward = 40 * XTZ
BabylonBlockReward = 24 * XTZ
GradanaLowPriorityBlockReward = 3 * XTZ
FlorenceLowPriorityBlockReward = 6 * XTZ
GranadaEndorsementReward = 0.078125 * XTZ
FlorenceEndorsementReward = 1.25 * XTZ
BabylonEndorsementRewards = 1.75 * XTZ
CarthageCycle = 208
GranadaCycle = 388
GranadaBlockEndorsers = 256
FlorenceBlockEndorsers = 32
TokensPerRoll = 8000
TotalLocked = (GranadaBlockSecurityDeposit + GranadaEndorsementSecurityDeposit*GranadaBlockEndorsers) * BlocksInMainnetCycle * (PreservedCycles + 1)
BlockLockEstimate = GranadaBlockReward + GranadaBlockSecurityDeposit + GranadaBlockEndorsers*(GranadaEndorsementReward+GranadaEndorsementSecurityDeposit)
bakerMediaSource = "https://api.tzkt.io/v1/accounts/%s?metadata=true"
holdingPointStorageKey = "holding_points"
)
// BakerList retrives up to limit of bakers after the specified id.
func (t *TezTracker) PublicBakerList(limits Limiter, favorites []string) (publicBakers []models.PublicBaker, count int64, err error) {
r := t.repoProvider.GetBaker()
count, err = r.PublicBakersCount()
if err != nil {
return nil, 0, err
}
bakers, err := r.PublicBakersList(limits.Limit(), limits.Offset(), favorites)
if err != nil {
return nil, 0, err
}
block, err := t.repoProvider.GetBlock().Last()
if err != nil {
return nil, 0, err
}
//Get last snapshot
_, snap, err := t.repoProvider.GetSnapshots().Find(block.MetaCycle - PreservedCycles)
if err != nil {
return nil, 0, err
}
for i := range bakers {
bakers[i].StakingCapacity = t.calcBakerCapacity(bakers[i], snap.Rolls)
}
// insert bakers changes
var changes map[string]models.BakerChanges
isFound, err := t.repoProvider.GetStorage().Get(models.BakersChangesStorageKey, &changes)
if err != nil {
return nil, 0, fmt.Errorf("GetStorage: Get: %s", err.Error())
}
if !isFound {
return nil, 0, fmt.Errorf("Baker changes not found")
}
publicBakers = make([]models.PublicBaker, len(bakers))
for i, baker := range bakers {
pb := models.PublicBaker{
Baker: baker,
}
change, ok := changes[baker.AccountID]
if ok {
pb.StakeChange = change.Balance
pb.DelegatorsChange = change.Delegators
}
publicBakers[i] = pb
}
return publicBakers, count, nil
}
func (t *TezTracker) PublicBakersSearchList() (list []models.PublicBakerSearch, err error) {
list, err = t.repoProvider.GetBaker().PublicBakersSearchList()
if err != nil {
return nil, err
}
return list, nil
}
func (t *TezTracker) BakerList(limits Limiter, favorites []string) (bakers []models.Baker, count int64, err error) {
r := t.repoProvider.GetBaker()
count, err = r.Count()
if err != nil {
return nil, 0, err
}
bakers, err = r.List(limits.Limit(), limits.Offset(), favorites)
return bakers, count, err
}
//Used BakingBad capacity formula
func (t *TezTracker) calcBakerCapacity(bi models.Baker, totalRolls int64) int64 {
bakerBalanceF := float64(bi.Balance - bi.FrozenEndorsementRewards - bi.FrozenBakingRewards)
totalRollsF := float64(totalRolls)
bakerShare := bakerBalanceF / float64(TotalLocked)
bakerRollsCapacity := totalRollsF * bakerShare
return int64(bakerRollsCapacity * float64(TokensPerRoll) * float64(XTZ))
}
func (t *TezTracker) GetCurrentCycle() (int64, error) {
r := t.repoProvider.GetBlock()
lastBlock, err := r.Last()
if err != nil {
return 0, err
}
return lastBlock.MetaCycle, nil
}
func getFirstPreservedBlock(currentCycle, blocksInCycle int64) (fpb int64) {
fpc := currentCycle - PreservedCycles
if fpc > 0 {
fpb = (GranadaCycle)*blocksInCycle/2 + (fpc-GranadaCycle)*blocksInCycle + 1
}
return fpb
}
//TODO change this method
func (t *TezTracker) GetBakerInfo(accountID string) (bi *models.Baker, err error) {
r := t.repoProvider.GetBaker()
found, baker, err := r.Find(accountID)
if err != nil {
return bi, err
}
if !found {
return nil, nil
}
err = t.calcDepositRewards(&baker.BakerStats, baker.AccountID)
if err != nil {
return bi, err
}
block, err := t.repoProvider.GetBlock().Last()
if err != nil {
return nil, err
}
//Get last snapshot
_, snap, err := t.repoProvider.GetSnapshots().Find(block.MetaCycle - PreservedCycles - 2)
if err != nil {
return nil, err
}
baker.StakingCapacity = t.calcBakerCapacity(baker, snap.Rolls)
return &baker, nil
}
func (t *TezTracker) calcDepositRewards(bi *models.BakerStats, accountID string) (err error) {
bi.BakingDeposits = bi.BakingCount * GranadaBlockSecurityDeposit
bi.BakingRewards = bi.FrozenBakingRewards
bi.EndorsementDeposits = bi.EndorsementCount * GranadaBlockSecurityDeposit
bi.EndorsementRewards = bi.FrozenEndorsementRewards
return nil
}
func (t *TezTracker) getLockedBalance() (int64, error) {
blockR := t.repoProvider.GetBlock()
lastBlock, err := blockR.Last()
if err != nil {
return 0, err
}
curCycle := lastBlock.MetaCycle
fpb := getFirstPreservedBlock(curCycle, t.BlocksInCycle())
lockedBlocks := lastBlock.Level.Int64 - fpb
lockedBalanceEstimate := lockedBlocks * BlockLockEstimate
return lockedBalanceEstimate, nil
}
// GetStakingRatio calculates the rough ratio of staked balance to the total supply.
func (t *TezTracker) GetStakingRatio() (float64, error) {
lockedBalanceEstimate, err := t.getLockedBalance()
if err != nil {
return 0, err
}
ar := t.repoProvider.GetAccount()
liquidBalance, err := ar.TotalBalance()
if err != nil {
return 0, err
}
br := t.repoProvider.GetBaker()
stakedBalance, err := br.TotalStakingBalance()
if err != nil {
return 0, err
}
supply := liquidBalance + lockedBalanceEstimate
if supply == 0 {
return 0, nil
}
lastBlock, err := t.repoProvider.GetBlock().Last()
if err != nil {
return 0, nil
}
bakingRewards, err := br.TotalBakingRewards("", lastBlock.MetaCycle-PreservedCycles, lastBlock.MetaCycle)
if err != nil {
return 0, nil
}
endorsementRewards, err := br.TotalEndorsementRewards("", lastBlock.MetaCycle-PreservedCycles, lastBlock.MetaCycle)
if err != nil {
return 0, nil
}
stakedBalance = stakedBalance - bakingRewards - endorsementRewards
ratio := float64(stakedBalance) / float64(supply)
return ratio, nil
}
func (t *TezTracker) GetThirdPartyBakers() (bakers []models.ThirdPartyBakerAgg, err error) {
tpbRepo := t.repoProvider.GetThirdPartyBakers()
return tpbRepo.GetAggregatedBakers()
}
func (t *TezTracker) UpdateBakersSocialMedia() error {
bakersRepo := t.repoProvider.GetBaker()
bakers, err := bakersRepo.PublicBakersList(10000, 0, nil)
if err != nil {
return fmt.Errorf("bakersRepo.PublicBakersList: %s", err.Error())
}
for _, baker := range bakers {
media, err := getBakerMediaData(baker.AccountID)
if err != nil {
return fmt.Errorf("getBakerMediaData: %s", err.Error())
}
baker.Media = string(media)
err = bakersRepo.UpdateBaker(baker)
if err != nil {
return fmt.Errorf("bakersRepo.UpdateBaker: %s", err.Error())
}
}
return nil
}
type bakerInfo struct {
Metadata struct {
Site string `json:"site,omitempty"`
Twitter string `json:"twitter,omitempty"`
Telegram string `json:"telegram,omitempty"`
Reddit string `json:"reddit,omitempty"`
} `json:"metadata"`
}
func getBakerMediaData(address string) (media []byte, err error) {
resp, err := http.Get(fmt.Sprintf(bakerMediaSource, address))
if err != nil {
return media, fmt.Errorf("http.Get: %s", err.Error())
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return media, fmt.Errorf("ioutil.ReadAll: %s", err.Error())
}
if resp.StatusCode != http.StatusOK {
return media, fmt.Errorf("bad request status: %d", resp.StatusCode)
}
var info bakerInfo
err = json.Unmarshal(data, &info)
if err != nil {
return media, fmt.Errorf("json.Unmarshal: %s", err.Error())
}
media, _ = json.Marshal(info.Metadata)
return media, nil
}
func (t *TezTracker) GetNumberOfDelegators() (items []models.BakerDelegators, err error) {
block, err := t.repoProvider.GetBlock().Last()
if err != nil {
return nil, fmt.Errorf("get LastBlock: %s", err.Error())
}
items, err = t.repoProvider.GetBaker().NumberOfDelegators(uint64(block.MetaCycle))
if err != nil {
return nil, fmt.Errorf("NumberOfDelegators: %s", err.Error())
}
return items, nil
}
func (t *TezTracker) GetBakersStakeChange() (items []models.BakerDelegators, err error) {
block, err := t.repoProvider.GetBlock().Last()
if err != nil {
return nil, fmt.Errorf("get LastBlock: %s", err.Error())
}
prevStakes, err := t.repoProvider.GetBaker().GetBakersStake(uint64(block.MetaCycle - 1))
if err != nil {
return nil, fmt.Errorf("BakersStake: %s", err.Error())
}
prevStakesMap := make(map[string]int64)
for _, stake := range prevStakes {
prevStakesMap[stake.Address] = stake.Value
}
lastStakes, err := t.repoProvider.GetBaker().GetBakersStake(uint64(block.MetaCycle))
if err != nil {
return nil, fmt.Errorf("BakersStake: %s", err.Error())
}
items = make([]models.BakerDelegators, len(lastStakes))
for i := range lastStakes {
var diff int64
p, ok := prevStakesMap[lastStakes[i].Address]
if ok {
diff = lastStakes[i].Value - p
}
items[i] = models.BakerDelegators{
Baker: lastStakes[i].Baker,
Address: lastStakes[i].Address,
Value: diff,
}
}
return items, nil
}
func (t *TezTracker) GetBakersVoting() (voting models.BakersVoting, err error) {
bakers, err := t.repoProvider.GetBaker().GetBakersVoting()
if err != nil {
return voting, fmt.Errorf("GetBakersVoting: %s", err.Error())
}
count, err := t.repoProvider.GetVotingPeriod().ProposalsCount()
if err != nil {
return voting, fmt.Errorf("ProposalsCount: %s", err.Error())
}
return models.BakersVoting{
ProposalsCount: count,
Bakers: bakers,
}, nil
}
func (t *TezTracker) SaveHoldingPoints() error {
points := []float64{0.05, 0.33, 0.51, 0.8}
bakers, err := t.repoProvider.GetBaker().List(100000, 0, nil)
if err != nil {
return fmt.Errorf("repoProvider.Baker: List: %s", err.Error())
}
sort.Slice(bakers, func(i, j int) bool {
return bakers[i].StakingBalance > bakers[j].StakingBalance
})
var total int64
for _, baker := range bakers {
total += baker.StakingBalance
}
var holdingPoints []models.HoldingPoint
for _, point := range points {
var amount int64
var count int64
for _, baker := range bakers {
amount += baker.StakingBalance
count++
p, _ := decimal.NewFromInt(amount).Div(decimal.NewFromInt(total)).Float64()
if p >= point {
break
}
}
holdingPoints = append(holdingPoints, models.HoldingPoint{
Percent: point,
Amount: amount,
Count: count,
})
}
err = t.repoProvider.GetStorage().Set(holdingPointStorageKey, holdingPoints)
if err != nil {
return fmt.Errorf("GetStorage: Set: %s", err.Error())
}
return nil
}
func (t *TezTracker) GetHoldingPoints() (items []models.HoldingPoint, err error) {
_, err = t.repoProvider.GetStorage().Get(holdingPointStorageKey, &items)
return items, err
}