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engine_v2_hooks.go
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engine_v2_hooks.go
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package hooks
import (
"errors"
"fmt"
"math/big"
"time"
"github.com/XinFinOrg/XDPoSChain/common"
"github.com/XinFinOrg/XDPoSChain/consensus"
"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS"
"github.com/XinFinOrg/XDPoSChain/contracts"
"github.com/XinFinOrg/XDPoSChain/core"
"github.com/XinFinOrg/XDPoSChain/core/state"
"github.com/XinFinOrg/XDPoSChain/core/types"
"github.com/XinFinOrg/XDPoSChain/eth/util"
"github.com/XinFinOrg/XDPoSChain/log"
"github.com/XinFinOrg/XDPoSChain/params"
)
func AttachConsensusV2Hooks(adaptor *XDPoS.XDPoS, bc *core.BlockChain, chainConfig *params.ChainConfig) {
// Hook scans for bad masternodes and decide to penalty them
adaptor.EngineV2.HookPenalty = func(chain consensus.ChainReader, number *big.Int, currentHash common.Hash, candidates []common.Address) ([]common.Address, error) {
start := time.Now()
listBlockHash := []common.Hash{}
// get list block hash & stats total created block
statMiners := make(map[common.Address]int)
listBlockHash = append(listBlockHash, currentHash)
parentNumber := number.Uint64() - 1
parentHash := currentHash
// check and wait the latest block is already in the disk
// sometimes blocks are yet inserted into block
for timeout := 0; ; timeout++ {
parentHeader := chain.GetHeader(parentHash, parentNumber)
if parentHeader != nil { // found the latest block in the disk
break
}
log.Info("[V2 Hook Penalty] parentHeader is nil, wait block to be writen in disk", "parentNumber", parentNumber)
time.Sleep(200 * time.Millisecond) // 0.2s
if timeout > 50 { // wait over 10s
log.Error("[V2 Hook Penalty] parentHeader is nil, wait too long not writen in to disk", "parentNumber", parentNumber)
return []common.Address{}, fmt.Errorf("parentHeader is nil")
}
}
for i := uint64(1); ; i++ {
parentHeader := chain.GetHeader(parentHash, parentNumber)
isEpochSwitch, _, err := adaptor.EngineV2.IsEpochSwitch(parentHeader)
if err != nil {
log.Error("[HookPenalty] isEpochSwitch", "err", err)
return []common.Address{}, err
}
if isEpochSwitch {
break
}
miner := parentHeader.Coinbase // we can directly use coinbase, since it's verified
_, exist := statMiners[miner]
if exist {
statMiners[miner]++
} else {
statMiners[miner] = 1
}
parentNumber--
parentHash = parentHeader.ParentHash
listBlockHash = append(listBlockHash, parentHash)
log.Debug("[HookPenalty] listBlockHash", "i", i, "len", len(listBlockHash), "parentHash", parentHash, "parentNumber", parentNumber)
}
// add list not miner to penalties
preMasternodes := adaptor.EngineV2.GetMasternodesByHash(chain, currentHash)
penalties := []common.Address{}
for miner, total := range statMiners {
if total < common.MinimunMinerBlockPerEpoch {
log.Info("[HookPenalty] Find a node does not create enough block", "addr", miner.Hex(), "total", total, "require", common.MinimunMinerBlockPerEpoch)
penalties = append(penalties, miner)
}
}
for _, addr := range preMasternodes {
if _, exist := statMiners[addr]; !exist {
log.Info("[HookPenalty] Find a node do not create any block", "addr", addr.Hex())
penalties = append(penalties, addr)
}
}
// get list check penalties signing block & list master nodes wil comeback
// start to calc comeback at v2 block + limitPenaltyEpochV2 to avoid reading v1 blocks
comebackHeight := (common.LimitPenaltyEpochV2+1)*chain.Config().XDPoS.Epoch + chain.Config().XDPoS.V2.SwitchBlock.Uint64()
penComebacks := []common.Address{}
if number.Uint64() > comebackHeight {
pens := adaptor.EngineV2.GetPreviousPenaltyByHash(chain, currentHash, common.LimitPenaltyEpochV2)
for _, p := range pens {
for _, addr := range candidates {
if p == addr {
log.Info("[HookPenalty] get previous penalty node and add into comeback list", "addr", addr)
penComebacks = append(penComebacks, p)
break
}
}
}
}
// Loop for each block to check missing sign. with comeback nodes
mapBlockHash := map[common.Hash]bool{}
startRange := common.RangeReturnSigner - 1
// to prevent visiting outside index of listBlockHash
if startRange >= len(listBlockHash) {
startRange = len(listBlockHash) - 1
}
for i := startRange; i >= 0; i-- {
if len(penComebacks) == 0 {
break
}
blockNumber := number.Uint64() - uint64(i) - 1
bhash := listBlockHash[i]
if blockNumber%common.MergeSignRange == 0 {
mapBlockHash[bhash] = true
}
signData, ok := adaptor.GetCachedSigningTxs(bhash)
if !ok {
block := chain.GetBlock(bhash, blockNumber)
txs := block.Transactions()
signData = adaptor.CacheSigningTxs(bhash, txs)
}
txs := signData.([]*types.Transaction)
// Check signer signed?
for _, tx := range txs {
blkHash := common.BytesToHash(tx.Data()[len(tx.Data())-32:])
from := *tx.From()
if mapBlockHash[blkHash] {
for j, addr := range penComebacks {
if from == addr {
// Remove it from dupSigners.
penComebacks = append(penComebacks[:j], penComebacks[j+1:]...)
break
}
}
}
}
}
for _, comeback := range penComebacks {
ok := true
for _, p := range penalties {
if p == comeback {
ok = false
break
}
}
if ok {
penalties = append(penalties, comeback)
}
}
for i, p := range penalties {
log.Info("[HookPenalty] Final penalty list", "index", i, "addr", p)
}
log.Info("[HookPenalty] Time Calculated HookPenaltyV2 ", "block", number, "time", common.PrettyDuration(time.Since(start)))
return penalties, nil
}
// Hook calculates reward for masternodes
adaptor.EngineV2.HookReward = func(chain consensus.ChainReader, stateBlock *state.StateDB, parentState *state.StateDB, header *types.Header) (map[string]interface{}, error) {
number := header.Number.Uint64()
foundationWalletAddr := chain.Config().XDPoS.FoudationWalletAddr
if foundationWalletAddr == (common.Address{}) {
log.Error("Foundation Wallet Address is empty", "error", foundationWalletAddr)
return nil, errors.New("foundation wallet address is empty")
}
rewards := make(map[string]interface{})
// skip hook reward if this is the first v2
if number == chain.Config().XDPoS.V2.SwitchBlock.Uint64()+1 {
return rewards, nil
}
start := time.Now()
// Get reward inflation.
chainReward := new(big.Int).Mul(new(big.Int).SetUint64(chain.Config().XDPoS.Reward), new(big.Int).SetUint64(params.Ether))
chainReward = util.RewardInflation(chain, chainReward, number, common.BlocksPerYear)
// Get signers/signing tx count
totalSigner := new(uint64)
signers, err := GetSigningTxCount(adaptor, chain, header, totalSigner)
log.Debug("Time Get Signers", "block", header.Number.Uint64(), "time", common.PrettyDuration(time.Since(start)))
if err != nil {
log.Error("[HookReward] Fail to get signers count for reward checkpoint", "error", err)
return nil, err
}
rewards["signers"] = signers
rewardSigners, err := contracts.CalculateRewardForSigner(chainReward, signers, *totalSigner)
if err != nil {
log.Error("[HookReward] Fail to calculate reward for signers", "error", err)
return nil, err
}
// Add reward for coin holders.
voterResults := make(map[common.Address]interface{})
if len(signers) > 0 {
for signer, calcReward := range rewardSigners {
err, rewards := contracts.CalculateRewardForHolders(foundationWalletAddr, parentState, signer, calcReward, number)
if err != nil {
log.Error("[HookReward] Fail to calculate reward for holders.", "error", err)
return nil, err
}
if len(rewards) > 0 {
for holder, reward := range rewards {
stateBlock.AddBalance(holder, reward)
}
}
voterResults[signer] = rewards
}
}
rewards["rewards"] = voterResults
log.Debug("Time Calculated HookReward ", "block", header.Number.Uint64(), "time", common.PrettyDuration(time.Since(start)))
return rewards, nil
}
}
// get signing transaction sender count
func GetSigningTxCount(c *XDPoS.XDPoS, chain consensus.ChainReader, header *types.Header, totalSigner *uint64) (map[common.Address]*contracts.RewardLog, error) {
// header should be a new epoch switch block
number := header.Number.Uint64()
rewardEpochCount := 2
signEpochCount := 1
signers := make(map[common.Address]*contracts.RewardLog)
mapBlkHash := map[uint64]common.Hash{}
data := make(map[common.Hash][]common.Address)
epochCount := 0
var masternodes []common.Address
var startBlockNumber, endBlockNumber uint64
for i := number - 1; ; i-- {
header = chain.GetHeader(header.ParentHash, i)
isEpochSwitch, _, err := c.IsEpochSwitch(header)
if err != nil {
return nil, err
}
if isEpochSwitch && i != chain.Config().XDPoS.V2.SwitchBlock.Uint64()+1 {
epochCount += 1
if epochCount == signEpochCount {
endBlockNumber = header.Number.Uint64() - 1
}
if epochCount == rewardEpochCount {
startBlockNumber = header.Number.Uint64() + 1
masternodes = c.GetMasternodesFromCheckpointHeader(header)
break
}
}
mapBlkHash[i] = header.Hash()
signData, ok := c.GetCachedSigningTxs(header.Hash())
if !ok {
log.Debug("Failed get from cached", "hash", header.Hash().String(), "number", i)
block := chain.GetBlock(header.Hash(), i)
txs := block.Transactions()
signData = c.CacheSigningTxs(header.Hash(), txs)
}
txs := signData.([]*types.Transaction)
for _, tx := range txs {
blkHash := common.BytesToHash(tx.Data()[len(tx.Data())-32:])
from := *tx.From()
data[blkHash] = append(data[blkHash], from)
}
}
for i := startBlockNumber; i <= endBlockNumber; i++ {
if i%common.MergeSignRange == 0 {
addrs := data[mapBlkHash[i]]
// Filter duplicate address.
if len(addrs) > 0 {
addrSigners := make(map[common.Address]bool)
for _, masternode := range masternodes {
for _, addr := range addrs {
if addr == masternode {
if _, ok := addrSigners[addr]; !ok {
addrSigners[addr] = true
}
break
}
}
}
for addr := range addrSigners {
_, exist := signers[addr]
if exist {
signers[addr].Sign++
} else {
signers[addr] = &contracts.RewardLog{Sign: 1, Reward: new(big.Int)}
}
*totalSigner++
}
}
}
}
log.Info("Calculate reward at checkpoint", "startBlock", startBlockNumber, "endBlock", endBlockNumber)
return signers, nil
}