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package api
import (
"database/sql"
"net/http"
"time"
ethCommon "github.com/ethereum/go-ethereum/common"
"github.com/gin-gonic/gin"
"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"`
}
// 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"`
}
var bootCoordinator historydb.CoordinatorAPI = historydb.CoordinatorAPI{
ItemID: 0,
Bidder: ethCommon.HexToAddress("0x111111111111111111111111111111111111111"),
Forger: ethCommon.HexToAddress("0x111111111111111111111111111111111111111"),
URL: "https://bootCoordinator",
}
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()
a.status.Rollup = rollupVariables
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()
a.status.Auction = auctionVariables
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
a.status.Unlock()
return 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 {
return nil, tracerr.Wrap(err)
}
nextForgers := []NextForger{}
// 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))),
},
}
foundBid := false
// If there is a bid for a slot, get forger (coordinator)
for j := range bids {
if bids[j].SlotNum == i {
foundBid = true
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 !foundBid {
nextForger.Coordinator = bootCoordinator
}
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.GetMetrics(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.GetAvgTxFee()
if err != nil {
return tracerr.Wrap(err)
}
a.status.Lock()
a.status.RecommendedFee.ExistingAccount = feeExistingAccount
a.status.RecommendedFee.CreatesAccount = createAccountExtraFeePercentage * feeExistingAccount
a.status.RecommendedFee.CreatesAccountAndRegister = createAccountInternalExtraFeePercentage * feeExistingAccount
a.status.Unlock()
return nil
}