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unlocker.go
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unlocker.go
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package payouts
import (
"fmt"
"log"
"math/big"
"strconv"
"strings"
"time"
"github.com/ethereum/go-ethereum/common/math"
"github.com/PoolNode/open-etc-pool/rpc"
"github.com/PoolNode/open-etc-pool/storage"
"github.com/PoolNode/open-etc-pool/util"
)
type UnlockerConfig struct {
Enabled bool `json:"enabled"`
PoolFee float64 `json:"poolFee"`
PoolFeeAddress string `json:"poolFeeAddress"`
Donate bool `json:"donate"`
Depth int64 `json:"depth"`
ImmatureDepth int64 `json:"immatureDepth"`
KeepTxFees bool `json:"keepTxFees"`
Interval string `json:"interval"`
Daemon string `json:"daemon"`
Timeout string `json:"timeout"`
Ecip1017FBlock int64 `json:"ecip1017FBlock"`
Ecip1017EraRounds *big.Int `json:"ecip1017EraRounds"`
ByzantiumFBlock *big.Int `json:"byzantiumFBlock"`
ConstantinopleFBlock *big.Int `json:"constantinopleFBlock"`
Network string `json:"network"`
}
const minDepth = 16
// params for etchash
var homesteadReward = math.MustParseBig256("5000000000000000000")
var disinflationRateQuotient = big.NewInt(4) // Disinflation rate quotient for ECIP1017
var disinflationRateDivisor = big.NewInt(5) // Disinflation rate divisor for ECIP1017
// params for ethash
var frontierBlockReward = big.NewInt(5e+18)
var byzantiumBlockReward = big.NewInt(3e+18)
var constantinopleBlockReward = big.NewInt(2e+18)
// params for ubqhash
var ubiqStartReward = big.NewInt(8e+18)
// misc consts
var big32 = big.NewInt(32)
var big8 = big.NewInt(8)
var big2 = big.NewInt(2)
type BlockUnlocker struct {
config *UnlockerConfig
backend *storage.RedisClient
rpc *rpc.RPCClient
halt bool
lastFail error
}
func NewBlockUnlocker(cfg *UnlockerConfig, backend *storage.RedisClient, network string) *BlockUnlocker {
// determine which monetary policy to use based on network
// configure any reward params if needed.
if network == "classic" {
cfg.Ecip1017FBlock = 5000000
cfg.Ecip1017EraRounds = big.NewInt(5000000)
} else if network == "mordor" {
cfg.Ecip1017FBlock = 0
cfg.Ecip1017EraRounds = big.NewInt(2000000)
} else if network == "ethereum" {
cfg.ByzantiumFBlock = big.NewInt(4370000)
cfg.ConstantinopleFBlock = big.NewInt(7280000)
} else if network == "ropsten" {
cfg.ByzantiumFBlock = big.NewInt(1700000)
cfg.ConstantinopleFBlock = big.NewInt(4230000)
} else if network == "ubiq" {
// nothing needs configuring here, simply proceed.
} else {
log.Fatalln("Invalid network set", network)
}
cfg.Network = network
if len(cfg.PoolFeeAddress) != 0 && !util.IsValidHexAddress(cfg.PoolFeeAddress) {
log.Fatalln("Invalid poolFeeAddress", cfg.PoolFeeAddress)
}
if cfg.Depth < minDepth*2 {
log.Fatalf("Block maturity depth can't be < %v, your depth is %v", minDepth*2, cfg.Depth)
}
if cfg.ImmatureDepth < minDepth {
log.Fatalf("Immature depth can't be < %v, your depth is %v", minDepth, cfg.ImmatureDepth)
}
u := &BlockUnlocker{config: cfg, backend: backend}
u.rpc = rpc.NewRPCClient("BlockUnlocker", cfg.Daemon, cfg.Timeout)
return u
}
func (u *BlockUnlocker) Start() {
log.Println("Starting block unlocker")
intv := util.MustParseDuration(u.config.Interval)
timer := time.NewTimer(intv)
log.Printf("Set block unlock interval to %v", intv)
// Immediately unlock after start
u.unlockPendingBlocks()
u.unlockAndCreditMiners()
timer.Reset(intv)
go func() {
for {
select {
case <-timer.C:
u.unlockPendingBlocks()
u.unlockAndCreditMiners()
timer.Reset(intv)
}
}
}()
}
type UnlockResult struct {
maturedBlocks []*storage.BlockData
orphanedBlocks []*storage.BlockData
orphans int
uncles int
blocks int
}
/* Geth does not provide consistent state when you need both new height and new job,
* so in redis I am logging just what I have in a pool state on the moment when block found.
* Having very likely incorrect height in database results in a weird block unlocking scheme,
* when I have to check what the hell we actually found and traversing all the blocks with height-N and height+N
* to make sure we will find it. We can't rely on round height here, it's just a reference point.
* ISSUE: https://github.com/ethereum/go-ethereum/issues/2333
*/
func (u *BlockUnlocker) unlockCandidates(candidates []*storage.BlockData) (*UnlockResult, error) {
result := &UnlockResult{}
// Data row is: "height:nonce:powHash:mixDigest:timestamp:diff:totalShares"
for _, candidate := range candidates {
orphan := true
/* Search for a normal block with wrong height here by traversing 16 blocks back and forward.
* Also we are searching for a block that can include this one as uncle.
*/
if candidate.Height < minDepth {
orphan = false
// avoid scanning the first 16 blocks
continue
}
for i := int64(minDepth * -1); i < minDepth; i++ {
height := candidate.Height + i
if height < 0 {
continue
}
block, err := u.rpc.GetBlockByHeight(height)
if err != nil {
log.Printf("Error while retrieving block %v from node: %v", height, err)
return nil, err
}
if block == nil {
return nil, fmt.Errorf("Error while retrieving block %v from node, wrong node height", height)
}
if matchCandidate(block, candidate) {
orphan = false
result.blocks++
err = u.handleBlock(block, candidate)
if err != nil {
u.halt = true
u.lastFail = err
return nil, err
}
result.maturedBlocks = append(result.maturedBlocks, candidate)
log.Printf("Mature block %v with %v tx, hash: %v", candidate.Height, len(block.Transactions), candidate.Hash[0:10])
break
}
if len(block.Uncles) == 0 {
continue
}
// Trying to find uncle in current block during our forward check
for uncleIndex, uncleHash := range block.Uncles {
uncle, err := u.rpc.GetUncleByBlockNumberAndIndex(height, uncleIndex)
if err != nil {
return nil, fmt.Errorf("Error while retrieving uncle of block %v from node: %v", uncleHash, err)
}
if uncle == nil {
return nil, fmt.Errorf("Error while retrieving uncle of block %v from node", height)
}
// Found uncle
if matchCandidate(uncle, candidate) {
orphan = false
result.uncles++
err := handleUncle(height, uncle, candidate, u.config)
if err != nil {
u.halt = true
u.lastFail = err
return nil, err
}
result.maturedBlocks = append(result.maturedBlocks, candidate)
log.Printf("Mature uncle %v/%v of reward %v with hash: %v", candidate.Height, candidate.UncleHeight,
util.FormatReward(candidate.Reward), uncle.Hash[0:10])
break
}
}
// Found block or uncle
if !orphan {
break
}
}
// Block is lost, we didn't find any valid block or uncle matching our data in a blockchain
if orphan {
result.orphans++
candidate.Orphan = true
result.orphanedBlocks = append(result.orphanedBlocks, candidate)
log.Printf("Orphaned block %v:%v", candidate.RoundHeight, candidate.Nonce)
}
}
return result, nil
}
func matchCandidate(block *rpc.GetBlockReply, candidate *storage.BlockData) bool {
// Just compare hash if block is unlocked as immature
if len(candidate.Hash) > 0 && strings.EqualFold(candidate.Hash, block.Hash) {
return true
}
// Geth-style candidate matching
if len(block.Nonce) > 0 {
return strings.EqualFold(block.Nonce, candidate.Nonce)
}
// Parity's EIP: https://github.com/ethereum/EIPs/issues/95
if len(block.SealFields) == 2 {
return strings.EqualFold(candidate.Nonce, block.SealFields[1])
}
return false
}
func (u *BlockUnlocker) handleBlock(block *rpc.GetBlockReply, candidate *storage.BlockData) error {
correctHeight, err := strconv.ParseInt(strings.Replace(block.Number, "0x", "", -1), 16, 64)
if err != nil {
return err
}
candidate.Height = correctHeight
var reward *big.Int = big.NewInt(0)
if u.config.Network == "classic" || u.config.Network == "mordor" {
era := GetBlockEra(big.NewInt(candidate.Height), u.config.Ecip1017EraRounds)
reward = getConstReward(era)
// Add reward for including uncles
uncleReward := getRewardForUncle(reward)
rewardForUncles := big.NewInt(0).Mul(uncleReward, big.NewInt(int64(len(block.Uncles))))
reward.Add(reward, rewardForUncles)
} else if u.config.Network == "ubiq" {
reward = getConstRewardUbiq(candidate.Height)
// Add reward for including uncles
uncleReward := new(big.Int).Div(reward, big32)
rewardForUncles := big.NewInt(0).Mul(uncleReward, big.NewInt(int64(len(block.Uncles))))
reward.Add(reward, rewardForUncles)
} else if u.config.Network == "ethereum" || u.config.Network == "ropsten" {
reward = getConstRewardEthereum(candidate.Height, u.config)
// Add reward for including uncles
uncleReward := new(big.Int).Div(reward, big32)
rewardForUncles := big.NewInt(0).Mul(uncleReward, big.NewInt(int64(len(block.Uncles))))
reward.Add(reward, rewardForUncles)
} else {
log.Fatalln("Invalid network set", u.config.Network)
}
// Add TX fees
extraTxReward, err := u.getExtraRewardForTx(block)
if err != nil {
return fmt.Errorf("Error while fetching TX receipt: %v", err)
}
if u.config.KeepTxFees {
candidate.ExtraReward = extraTxReward
} else {
reward.Add(reward, extraTxReward)
}
candidate.Orphan = false
candidate.Hash = block.Hash
candidate.Reward = reward
return nil
}
func handleUncle(height int64, uncle *rpc.GetBlockReply, candidate *storage.BlockData, cfg *UnlockerConfig) error {
uncleHeight, err := strconv.ParseInt(strings.Replace(uncle.Number, "0x", "", -1), 16, 64)
if err != nil {
return err
}
var reward *big.Int = big.NewInt(0)
if cfg.Network == "classic" || cfg.Network == "mordor" {
era := GetBlockEra(big.NewInt(height), cfg.Ecip1017EraRounds)
reward = getUncleReward(new(big.Int).SetInt64(uncleHeight), new(big.Int).SetInt64(height), era, getConstReward(era))
} else if cfg.Network == "ubiq" {
reward = getUncleRewardUbiq(new(big.Int).SetInt64(uncleHeight), new(big.Int).SetInt64(height), getConstRewardUbiq(height))
} else if cfg.Network == "ethereum" || cfg.Network == "ropsten" {
reward = getUncleRewardEthereum(new(big.Int).SetInt64(uncleHeight), new(big.Int).SetInt64(height), getConstRewardUbiq(height))
}
candidate.Height = height
candidate.UncleHeight = uncleHeight
candidate.Orphan = false
candidate.Hash = uncle.Hash
candidate.Reward = reward
return nil
}
func (u *BlockUnlocker) unlockPendingBlocks() {
if u.halt {
log.Println("Unlocking suspended due to last critical error:", u.lastFail)
return
}
current, err := u.rpc.GetPendingBlock()
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Unable to get current blockchain height from node: %v", err)
return
}
currentHeight, err := strconv.ParseInt(strings.Replace(current.Number, "0x", "", -1), 16, 64)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Can't parse pending block number: %v", err)
return
}
candidates, err := u.backend.GetCandidates(currentHeight - u.config.ImmatureDepth)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to get block candidates from backend: %v", err)
return
}
if len(candidates) == 0 {
log.Println("No block candidates to unlock")
return
}
result, err := u.unlockCandidates(candidates)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to unlock blocks: %v", err)
return
}
log.Printf("Immature %v blocks, %v uncles, %v orphans", result.blocks, result.uncles, result.orphans)
err = u.backend.WritePendingOrphans(result.orphanedBlocks)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to insert orphaned blocks into backend: %v", err)
return
} else {
log.Printf("Inserted %v orphaned blocks to backend", result.orphans)
}
totalRevenue := new(big.Rat)
totalMinersProfit := new(big.Rat)
totalPoolProfit := new(big.Rat)
for _, block := range result.maturedBlocks {
revenue, minersProfit, poolProfit, roundRewards, err := u.calculateRewards(block)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to calculate rewards for round %v: %v", block.RoundKey(), err)
return
}
err = u.backend.WriteImmatureBlock(block, roundRewards)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to credit rewards for round %v: %v", block.RoundKey(), err)
return
}
totalRevenue.Add(totalRevenue, revenue)
totalMinersProfit.Add(totalMinersProfit, minersProfit)
totalPoolProfit.Add(totalPoolProfit, poolProfit)
logEntry := fmt.Sprintf(
"IMMATURE %v: revenue %v, miners profit %v, pool profit: %v",
block.RoundKey(),
util.FormatRatReward(revenue),
util.FormatRatReward(minersProfit),
util.FormatRatReward(poolProfit),
)
entries := []string{logEntry}
for login, reward := range roundRewards {
entries = append(entries, fmt.Sprintf("\tREWARD %v: %v: %v Shannon", block.RoundKey(), login, reward))
}
log.Println(strings.Join(entries, "\n"))
}
log.Printf(
"IMMATURE SESSION: revenue %v, miners profit %v, pool profit: %v",
util.FormatRatReward(totalRevenue),
util.FormatRatReward(totalMinersProfit),
util.FormatRatReward(totalPoolProfit),
)
}
func (u *BlockUnlocker) unlockAndCreditMiners() {
if u.halt {
log.Println("Unlocking suspended due to last critical error:", u.lastFail)
return
}
current, err := u.rpc.GetPendingBlock()
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Unable to get current blockchain height from node: %v", err)
return
}
currentHeight, err := strconv.ParseInt(strings.Replace(current.Number, "0x", "", -1), 16, 64)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Can't parse pending block number: %v", err)
return
}
immature, err := u.backend.GetImmatureBlocks(currentHeight - u.config.Depth)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to get block candidates from backend: %v", err)
return
}
if len(immature) == 0 {
log.Println("No immature blocks to credit miners")
return
}
result, err := u.unlockCandidates(immature)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to unlock blocks: %v", err)
return
}
log.Printf("Unlocked %v blocks, %v uncles, %v orphans", result.blocks, result.uncles, result.orphans)
for _, block := range result.orphanedBlocks {
err = u.backend.WriteOrphan(block)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to insert orphaned block into backend: %v", err)
return
}
}
log.Printf("Inserted %v orphaned blocks to backend", result.orphans)
totalRevenue := new(big.Rat)
totalMinersProfit := new(big.Rat)
totalPoolProfit := new(big.Rat)
for _, block := range result.maturedBlocks {
revenue, minersProfit, poolProfit, roundRewards, err := u.calculateRewards(block)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to calculate rewards for round %v: %v", block.RoundKey(), err)
return
}
err = u.backend.WriteMaturedBlock(block, roundRewards)
if err != nil {
u.halt = true
u.lastFail = err
log.Printf("Failed to credit rewards for round %v: %v", block.RoundKey(), err)
return
}
totalRevenue.Add(totalRevenue, revenue)
totalMinersProfit.Add(totalMinersProfit, minersProfit)
totalPoolProfit.Add(totalPoolProfit, poolProfit)
logEntry := fmt.Sprintf(
"MATURED %v: revenue %v, miners profit %v, pool profit: %v",
block.RoundKey(),
util.FormatRatReward(revenue),
util.FormatRatReward(minersProfit),
util.FormatRatReward(poolProfit),
)
entries := []string{logEntry}
for login, reward := range roundRewards {
entries = append(entries, fmt.Sprintf("\tREWARD %v: %v: %v Shannon", block.RoundKey(), login, reward))
}
log.Println(strings.Join(entries, "\n"))
}
log.Printf(
"MATURE SESSION: revenue %v, miners profit %v, pool profit: %v",
util.FormatRatReward(totalRevenue),
util.FormatRatReward(totalMinersProfit),
util.FormatRatReward(totalPoolProfit),
)
}
func (u *BlockUnlocker) calculateRewards(block *storage.BlockData) (*big.Rat, *big.Rat, *big.Rat, map[string]int64, error) {
revenue := new(big.Rat).SetInt(block.Reward)
minersProfit, poolProfit := chargeFee(revenue, u.config.PoolFee)
shares, err := u.backend.GetRoundShares(block.RoundHeight, block.Nonce)
if err != nil {
return nil, nil, nil, nil, err
}
rewards := calculateRewardsForShares(shares, block.TotalShares, minersProfit)
if block.ExtraReward != nil {
extraReward := new(big.Rat).SetInt(block.ExtraReward)
poolProfit.Add(poolProfit, extraReward)
revenue.Add(revenue, extraReward)
}
if len(u.config.PoolFeeAddress) != 0 {
address := strings.ToLower(u.config.PoolFeeAddress)
rewards[address] += weiToShannonInt64(poolProfit)
}
return revenue, minersProfit, poolProfit, rewards, nil
}
func calculateRewardsForShares(shares map[string]int64, total int64, reward *big.Rat) map[string]int64 {
rewards := make(map[string]int64)
for login, n := range shares {
percent := big.NewRat(n, total)
workerReward := new(big.Rat).Mul(reward, percent)
rewards[login] += weiToShannonInt64(workerReward)
}
return rewards
}
// Returns new value after fee deduction and fee value.
func chargeFee(value *big.Rat, fee float64) (*big.Rat, *big.Rat) {
feePercent := new(big.Rat).SetFloat64(fee / 100)
feeValue := new(big.Rat).Mul(value, feePercent)
return new(big.Rat).Sub(value, feeValue), feeValue
}
func weiToShannonInt64(wei *big.Rat) int64 {
shannon := new(big.Rat).SetInt(util.Shannon)
inShannon := new(big.Rat).Quo(wei, shannon)
value, _ := strconv.ParseInt(inShannon.FloatString(0), 10, 64)
return value
}
// GetRewardByEra gets a block reward at disinflation rate.
// Constants MaxBlockReward, DisinflationRateQuotient, and DisinflationRateDivisor assumed.
func GetBlockWinnerRewardByEra(era *big.Int, blockReward *big.Int) *big.Int {
if era.Cmp(big.NewInt(0)) == 0 {
return new(big.Int).Set(blockReward)
}
// MaxBlockReward _r_ * (4/5)**era == MaxBlockReward * (4**era) / (5**era)
// since (q/d)**n == q**n / d**n
// qed
var q, d, r *big.Int = new(big.Int), new(big.Int), new(big.Int)
q.Exp(disinflationRateQuotient, era, nil)
d.Exp(disinflationRateDivisor, era, nil)
r.Mul(blockReward, q)
r.Div(r, d)
return r
}
// GetBlockEra gets which "Era" a given block is within, given an era length (ecip-1017 has era=5,000,000 blocks)
// Returns a zero-index era number, so "Era 1": 0, "Era 2": 1, "Era 3": 2 ...
func GetBlockEra(blockNum, eraLength *big.Int) *big.Int {
// If genesis block or impossible negative-numbered block, return zero-val.
if blockNum.Sign() < 1 {
return new(big.Int)
}
remainder := big.NewInt(0).Mod(big.NewInt(0).Sub(blockNum, big.NewInt(1)), eraLength)
base := big.NewInt(0).Sub(blockNum, remainder)
d := big.NewInt(0).Div(base, eraLength)
dremainder := big.NewInt(0).Mod(d, big.NewInt(1))
return new(big.Int).Sub(d, dremainder)
}
// etchash
func getConstReward(era *big.Int) *big.Int {
var blockReward = homesteadReward
wr := GetBlockWinnerRewardByEra(era, blockReward)
return wr
}
//etchash
func getRewardForUncle(blockReward *big.Int) *big.Int {
return new(big.Int).Div(blockReward, big32) //return new(big.Int).Div(reward, new(big.Int).SetInt64(32))
}
// etchash
func getUncleReward(uHeight *big.Int, height *big.Int, era *big.Int, reward *big.Int) *big.Int {
// Era 1 (index 0):
// An extra reward to the winning miner for including uncles as part of the block, in the form of an extra 1/32 (0.15625ETC) per uncle included, up to a maximum of two (2) uncles.
if era.Cmp(big.NewInt(0)) == 0 {
r := new(big.Int)
r.Add(uHeight, big8) // 2,534,998 + 8 = 2,535,006
r.Sub(r, height) // 2,535,006 - 2,534,999 = 7
r.Mul(r, reward) // 7 * 5e+18 = 35e+18
r.Div(r, big8) // 35e+18 / 8 = 7/8 * 5e+18
return r
}
return getRewardForUncle(reward)
}
// ubqhash
func getConstRewardUbiq(height int64) *big.Int {
// Rewards
reward := new(big.Int).Set(ubiqStartReward)
headerNumber := big.NewInt(height)
if headerNumber.Cmp(big.NewInt(358363)) > 0 {
reward = big.NewInt(7e+18)
// Year 1
}
if headerNumber.Cmp(big.NewInt(716727)) > 0 {
reward = big.NewInt(6e+18)
// Year 2
}
if headerNumber.Cmp(big.NewInt(1075090)) > 0 {
reward = big.NewInt(5e+18)
// Year 3
}
if headerNumber.Cmp(big.NewInt(1433454)) > 0 {
reward = big.NewInt(4e+18)
// Year 4
}
if headerNumber.Cmp(big.NewInt(1791818)) > 0 {
reward = big.NewInt(3e+18)
// Year 5
}
if headerNumber.Cmp(big.NewInt(2150181)) > 0 {
reward = big.NewInt(2e+18)
// Year 6
}
if headerNumber.Cmp(big.NewInt(2508545)) > 0 {
reward = big.NewInt(1e+18)
// Year 7
}
return reward
}
// ubqhash
func getUncleRewardUbiq(uHeight *big.Int, height *big.Int, reward *big.Int) *big.Int {
r := new(big.Int)
r.Add(uHeight, big2)
r.Sub(r, height)
r.Mul(r, reward)
r.Div(r, big2)
if r.Cmp(big.NewInt(0)) < 0 {
// blocks older than the previous block are not rewarded
r = big.NewInt(0)
}
return r
}
// ethash
func getConstRewardEthereum(height int64, cfg *UnlockerConfig) *big.Int {
// Select the correct block reward based on chain progression
blockReward := frontierBlockReward
headerNumber := big.NewInt(height)
if cfg.ByzantiumFBlock.Cmp(headerNumber) <= 0 {
blockReward = byzantiumBlockReward
}
if cfg.ConstantinopleFBlock.Cmp(headerNumber) <= 0 {
blockReward = constantinopleBlockReward
}
// Accumulate the rewards for the miner and any included uncles
reward := new(big.Int).Set(blockReward)
return reward
}
// ethash
func getUncleRewardEthereum(uHeight *big.Int, height *big.Int, reward *big.Int) *big.Int {
r := new(big.Int)
r.Add(uHeight, big8)
r.Sub(r, height)
r.Mul(r, reward)
r.Div(r, big8)
if r.Cmp(big.NewInt(0)) < 0 {
r = big.NewInt(0)
}
return r
}
// ethash, etchash, ubqhash
func (u *BlockUnlocker) getExtraRewardForTx(block *rpc.GetBlockReply) (*big.Int, error) {
amount := new(big.Int)
for _, tx := range block.Transactions {
receipt, err := u.rpc.GetTxReceipt(tx.Hash)
if err != nil {
return nil, err
}
if receipt != nil {
gasUsed := util.String2Big(receipt.GasUsed)
gasPrice := util.String2Big(tx.GasPrice)
fee := new(big.Int).Mul(gasUsed, gasPrice)
amount.Add(amount, fee)
}
}
return amount, nil
}