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package api
import (
"database/sql"
"fmt"
"math"
"math/big"
"net/http"
"time"
"github.com/gin-gonic/gin"
"github.com/hermeznetwork/hermez-node/apitypes"
"github.com/hermeznetwork/hermez-node/common"
"github.com/hermeznetwork/hermez-node/db/historydb"
"github.com/hermeznetwork/tracerr"
)
// Network define status of the network
type Network struct {
LastEthBlock int64 `json:"lastEthereumBlock"`
LastSyncBlock int64 `json:"lastSynchedBlock"`
LastBatch *historydb.BatchAPI `json:"lastBatch"`
CurrentSlot int64 `json:"currentSlot"`
NextForgers []NextForger `json:"nextForgers"`
}
// NodeConfig is the configuration of the node that is exposed via API
type NodeConfig struct {
// ForgeDelay in seconds
ForgeDelay float64 `json:"forgeDelay"`
}
// NextForger is a representation of the information of a coordinator and the period will forge
type NextForger struct {
Coordinator historydb.CoordinatorAPI `json:"coordinator"`
Period Period `json:"period"`
}
// Period is a representation of a period
type Period struct {
SlotNum int64 `json:"slotNum"`
FromBlock int64 `json:"fromBlock"`
ToBlock int64 `json:"toBlock"`
FromTimestamp time.Time `json:"fromTimestamp"`
ToTimestamp time.Time `json:"toTimestamp"`
}
func (a *API) getState(c *gin.Context) {
// TODO: There are no events for the buckets information, so now this information will be 0
a.status.RLock()
status := a.status //nolint
a.status.RUnlock()
c.JSON(http.StatusOK, status) //nolint
}
// SC Vars
// SetRollupVariables set Status.Rollup variables
func (a *API) SetRollupVariables(rollupVariables common.RollupVariables) {
a.status.Lock()
var rollupVAPI historydb.RollupVariablesAPI
rollupVAPI.EthBlockNum = rollupVariables.EthBlockNum
rollupVAPI.FeeAddToken = apitypes.NewBigIntStr(rollupVariables.FeeAddToken)
rollupVAPI.ForgeL1L2BatchTimeout = rollupVariables.ForgeL1L2BatchTimeout
rollupVAPI.WithdrawalDelay = rollupVariables.WithdrawalDelay
for i, bucket := range rollupVariables.Buckets {
var apiBucket historydb.BucketParamsAPI
apiBucket.CeilUSD = apitypes.NewBigIntStr(bucket.CeilUSD)
apiBucket.Withdrawals = apitypes.NewBigIntStr(bucket.Withdrawals)
apiBucket.BlockWithdrawalRate = apitypes.NewBigIntStr(bucket.BlockWithdrawalRate)
apiBucket.MaxWithdrawals = apitypes.NewBigIntStr(bucket.MaxWithdrawals)
rollupVAPI.Buckets[i] = apiBucket
}
rollupVAPI.SafeMode = rollupVariables.SafeMode
a.status.Rollup = rollupVAPI
a.status.Unlock()
}
// SetWDelayerVariables set Status.WithdrawalDelayer variables
func (a *API) SetWDelayerVariables(wDelayerVariables common.WDelayerVariables) {
a.status.Lock()
a.status.WithdrawalDelayer = wDelayerVariables
a.status.Unlock()
}
// SetAuctionVariables set Status.Auction variables
func (a *API) SetAuctionVariables(auctionVariables common.AuctionVariables) {
a.status.Lock()
var auctionAPI historydb.AuctionVariablesAPI
auctionAPI.EthBlockNum = auctionVariables.EthBlockNum
auctionAPI.DonationAddress = auctionVariables.DonationAddress
auctionAPI.BootCoordinator = auctionVariables.BootCoordinator
auctionAPI.BootCoordinatorURL = auctionVariables.BootCoordinatorURL
auctionAPI.DefaultSlotSetBidSlotNum = auctionVariables.DefaultSlotSetBidSlotNum
auctionAPI.ClosedAuctionSlots = auctionVariables.ClosedAuctionSlots
auctionAPI.OpenAuctionSlots = auctionVariables.OpenAuctionSlots
auctionAPI.Outbidding = auctionVariables.Outbidding
auctionAPI.SlotDeadline = auctionVariables.SlotDeadline
for i, slot := range auctionVariables.DefaultSlotSetBid {
auctionAPI.DefaultSlotSetBid[i] = apitypes.NewBigIntStr(slot)
}
for i, ratio := range auctionVariables.AllocationRatio {
auctionAPI.AllocationRatio[i] = ratio
}
a.status.Auction = auctionAPI
a.status.Unlock()
}
// Network
// UpdateNetworkInfoBlock update Status.Network block related information
func (a *API) UpdateNetworkInfoBlock(
lastEthBlock, lastSyncBlock common.Block,
) {
a.status.Network.LastSyncBlock = lastSyncBlock.Num
a.status.Network.LastEthBlock = lastEthBlock.Num
}
// UpdateNetworkInfo update Status.Network information
func (a *API) UpdateNetworkInfo(
lastEthBlock, lastSyncBlock common.Block,
lastBatchNum common.BatchNum, currentSlot int64,
) error {
lastBatch, err := a.h.GetBatchAPI(lastBatchNum)
if tracerr.Unwrap(err) == sql.ErrNoRows {
lastBatch = nil
} else if err != nil {
return tracerr.Wrap(err)
}
lastClosedSlot := currentSlot + int64(a.status.Auction.ClosedAuctionSlots)
nextForgers, err := a.getNextForgers(lastSyncBlock, currentSlot, lastClosedSlot)
if tracerr.Unwrap(err) == sql.ErrNoRows {
nextForgers = nil
} else if err != nil {
return tracerr.Wrap(err)
}
a.status.Lock()
a.status.Network.LastSyncBlock = lastSyncBlock.Num
a.status.Network.LastEthBlock = lastEthBlock.Num
a.status.Network.LastBatch = lastBatch
a.status.Network.CurrentSlot = currentSlot
a.status.Network.NextForgers = nextForgers
// Update buckets withdrawals
bucketsUpdate, err := a.h.GetBucketUpdatesAPI()
if tracerr.Unwrap(err) == sql.ErrNoRows {
bucketsUpdate = nil
} else if err != nil {
return tracerr.Wrap(err)
}
for i, bucketParams := range a.status.Rollup.Buckets {
for _, bucketUpdate := range bucketsUpdate {
if bucketUpdate.NumBucket == i {
bucketParams.Withdrawals = bucketUpdate.Withdrawals
a.status.Rollup.Buckets[i] = bucketParams
break
}
}
}
a.status.Unlock()
return nil
}
// apiSlotToBigInts converts from [6]*apitypes.BigIntStr to [6]*big.Int
func apiSlotToBigInts(defaultSlotSetBid [6]*apitypes.BigIntStr) ([6]*big.Int, error) {
var slots [6]*big.Int
for i, slot := range defaultSlotSetBid {
bigInt, ok := new(big.Int).SetString(string(*slot), 10)
if !ok {
return slots, tracerr.Wrap(fmt.Errorf("can't convert %T into big.Int", slot))
}
slots[i] = bigInt
}
return slots, nil
}
// getNextForgers returns next forgers
func (a *API) getNextForgers(lastBlock common.Block, currentSlot, lastClosedSlot int64) ([]NextForger, error) {
secondsPerBlock := int64(15) //nolint:gomnd
// currentSlot and lastClosedSlot included
limit := uint(lastClosedSlot - currentSlot + 1)
bids, _, err := a.h.GetBestBidsAPI(&currentSlot, &lastClosedSlot, nil, &limit, "ASC")
if err != nil && tracerr.Unwrap(err) != sql.ErrNoRows {
return nil, tracerr.Wrap(err)
}
nextForgers := []NextForger{}
// Get min bid info
var minBidInfo []historydb.MinBidInfo
if currentSlot >= a.status.Auction.DefaultSlotSetBidSlotNum {
// All min bids can be calculated with the last update of AuctionVariables
bigIntSlots, err := apiSlotToBigInts(a.status.Auction.DefaultSlotSetBid)
if err != nil {
return nil, tracerr.Wrap(err)
}
minBidInfo = []historydb.MinBidInfo{{
DefaultSlotSetBid: bigIntSlots,
DefaultSlotSetBidSlotNum: a.status.Auction.DefaultSlotSetBidSlotNum,
}}
} else {
// Get all the relevant updates from the DB
minBidInfo, err = a.h.GetAuctionVarsUntilSetSlotNumAPI(lastClosedSlot, int(lastClosedSlot-currentSlot)+1)
if err != nil {
return nil, tracerr.Wrap(err)
}
}
// Create nextForger for each slot
for i := currentSlot; i <= lastClosedSlot; i++ {
fromBlock := i*int64(a.cg.AuctionConstants.BlocksPerSlot) + a.cg.AuctionConstants.GenesisBlockNum
toBlock := (i+1)*int64(a.cg.AuctionConstants.BlocksPerSlot) + a.cg.AuctionConstants.GenesisBlockNum - 1
nextForger := NextForger{
Period: Period{
SlotNum: i,
FromBlock: fromBlock,
ToBlock: toBlock,
FromTimestamp: lastBlock.Timestamp.Add(time.Second * time.Duration(secondsPerBlock*(fromBlock-lastBlock.Num))),
ToTimestamp: lastBlock.Timestamp.Add(time.Second * time.Duration(secondsPerBlock*(toBlock-lastBlock.Num))),
},
}
foundForger := false
// If there is a bid for a slot, get forger (coordinator)
for j := range bids {
slotNum := bids[j].SlotNum
if slotNum == i {
// There's a bid for the slot
// Check if the bid is greater than the minimum required
for i := 0; i < len(minBidInfo); i++ {
// Find the most recent update
if slotNum >= minBidInfo[i].DefaultSlotSetBidSlotNum {
// Get min bid
minBidSelector := slotNum % int64(len(a.status.Auction.DefaultSlotSetBid))
minBid := minBidInfo[i].DefaultSlotSetBid[minBidSelector]
// Check if the bid has beaten the minimum
bid, ok := new(big.Int).SetString(string(bids[j].BidValue), 10)
if !ok {
return nil, tracerr.New("Wrong bid value, error parsing it as big.Int")
}
if minBid.Cmp(bid) == 1 {
// Min bid is greater than bid, the slot will be forged by boot coordinator
break
}
foundForger = true
break
}
}
if !foundForger { // There is no bid or it's smaller than the minimum
break
}
coordinator, err := a.h.GetCoordinatorAPI(bids[j].Bidder)
if err != nil {
return nil, tracerr.Wrap(err)
}
nextForger.Coordinator = *coordinator
break
}
}
// If there is no bid, the coordinator that will forge is boot coordinator
if !foundForger {
nextForger.Coordinator = historydb.CoordinatorAPI{
Forger: a.status.Auction.BootCoordinator,
URL: a.status.Auction.BootCoordinatorURL,
}
}
nextForgers = append(nextForgers, nextForger)
}
return nextForgers, nil
}
// Metrics
// UpdateMetrics update Status.Metrics information
func (a *API) UpdateMetrics() error {
a.status.RLock()
if a.status.Network.LastBatch == nil {
a.status.RUnlock()
return nil
}
batchNum := a.status.Network.LastBatch.BatchNum
a.status.RUnlock()
metrics, err := a.h.GetMetricsAPI(batchNum)
if err != nil {
return tracerr.Wrap(err)
}
a.status.Lock()
a.status.Metrics = *metrics
a.status.Unlock()
return nil
}
// Recommended fee
// UpdateRecommendedFee update Status.RecommendedFee information
func (a *API) UpdateRecommendedFee() error {
feeExistingAccount, err := a.h.GetAvgTxFeeAPI()
if err != nil {
return tracerr.Wrap(err)
}
var minFeeUSD float64
if a.l2 != nil {
minFeeUSD = a.l2.MinFeeUSD()
}
a.status.Lock()
a.status.RecommendedFee.ExistingAccount =
math.Max(feeExistingAccount, minFeeUSD)
a.status.RecommendedFee.CreatesAccount =
math.Max(createAccountExtraFeePercentage*feeExistingAccount, minFeeUSD)
a.status.RecommendedFee.CreatesAccountAndRegister =
math.Max(createAccountInternalExtraFeePercentage*feeExistingAccount, minFeeUSD)
a.status.Unlock()
return nil
}