Merge pull request #614 from hermeznetwork/feature/forger-config-options

Add the option to forge batch at the slot deadline

cli/node/cfg.buidler.toml

@@ -86,6 +86,8 @@ SyncRetryInterval = "1s"
 ForgeDelay = "10s"
 ForgeNoTxsDelay = "0s"
 PurgeByExtDelInterval = "1m"
+MustForgeAtSlotDeadline = true
+IgnoreSlotCommitment = false
 
 [Coordinator.FeeAccount]
 Address = "0x56232B1c5B10038125Bc7345664B4AFD745bcF8E"

config/config.go

@@ -102,6 +102,14 @@ type Coordinator struct {
 	// to 0s, the coordinator will continuously forge even if the batches
 	// are empty.
 	ForgeNoTxsDelay Duration `validate:"-"`
+	// MustForgeAtSlotDeadline enables the coordinator to forge slots if
+	// the empty slots reach the slot deadline.
+	MustForgeAtSlotDeadline bool
+	// IgnoreSlotCommitment IgnoreSlotCommitment disables forcing the
+	// coordinator to forge a slot immediately when the slot is not
+	// committed. If set to false, the coordinator will immediately forge
+	// a batch at the beginning of a slot if it's the slot winner.
+	IgnoreSlotCommitment bool
 	// SyncRetryInterval is the waiting interval between calls to the main
 	// handler of a synced block after an error
 	SyncRetryInterval Duration `validate:"required"`

coordinator/coordinator.go

@@ -84,6 +84,14 @@ type Config struct {
 	// to 0s, the coordinator will continuously forge even if the batches
 	// are empty.
 	ForgeNoTxsDelay time.Duration
+	// MustForgeAtSlotDeadline enables the coordinator to forge slots if
+	// the empty slots reach the slot deadline.
+	MustForgeAtSlotDeadline bool
+	// IgnoreSlotCommitment disables forcing the coordinator to forge a
+	// slot immediately when the slot is not committed. If set to false,
+	// the coordinator will immediately forge a batch at the beginning of
+	// a slot if it's the slot winner.
+	IgnoreSlotCommitment bool
 	// SyncRetryInterval is the waiting interval between calls to the main
 	// handler of a synced block after an error
 	SyncRetryInterval time.Duration
@@ -318,7 +326,8 @@ func (c *Coordinator) syncSCVars(vars synchronizer.SCVariablesPtr) {
 }
 
 func canForge(auctionConstants *common.AuctionConstants, auctionVars *common.AuctionVariables,
-	currentSlot *common.Slot, nextSlot *common.Slot, addr ethCommon.Address, blockNum int64) bool {
+	currentSlot *common.Slot, nextSlot *common.Slot, addr ethCommon.Address, blockNum int64,
+	mustForgeAtDeadline bool) bool {
 	if blockNum < auctionConstants.GenesisBlockNum {
 		log.Infow("canForge: requested blockNum is < genesis", "blockNum", blockNum,
 			"genesis", auctionConstants.GenesisBlockNum)
@@ -343,7 +352,7 @@ func canForge(auctionConstants *common.AuctionConstants, auctionVars *common.Auc
 			"block", blockNum)
 		anyoneForge = true
 	}
-	if slot.Forger == addr || anyoneForge {
+	if slot.Forger == addr || (anyoneForge && mustForgeAtDeadline) {
 		return true
 	}
 	log.Debugw("canForge: can't forge", "slot.Forger", slot.Forger)
@@ -353,14 +362,14 @@ func canForge(auctionConstants *common.AuctionConstants, auctionVars *common.Auc
 func (c *Coordinator) canForgeAt(blockNum int64) bool {
 	return canForge(&c.consts.Auction, &c.vars.Auction,
 		&c.stats.Sync.Auction.CurrentSlot, &c.stats.Sync.Auction.NextSlot,
-		c.cfg.ForgerAddress, blockNum)
+		c.cfg.ForgerAddress, blockNum, c.cfg.MustForgeAtSlotDeadline)
 }
 
 func (c *Coordinator) canForge() bool {
 	blockNum := c.stats.Eth.LastBlock.Num + 1
 	return canForge(&c.consts.Auction, &c.vars.Auction,
 		&c.stats.Sync.Auction.CurrentSlot, &c.stats.Sync.Auction.NextSlot,
-		c.cfg.ForgerAddress, blockNum)
+		c.cfg.ForgerAddress, blockNum, c.cfg.MustForgeAtSlotDeadline)
 }
 
 func (c *Coordinator) syncStats(ctx context.Context, stats *synchronizer.Stats) error {

coordinator/coordinator_test.go

@@ -167,6 +167,7 @@ func newTestCoordinator(t *testing.T, forgerAddr ethCommon.Address, ethClient *t
 		EthClientAttemptsDelay:  100 * time.Millisecond,
 		TxManagerCheckInterval:  300 * time.Millisecond,
 		DebugBatchPath:          debugBatchPath,
+		MustForgeAtSlotDeadline: true,
 		Purger: PurgerCfg{
 			PurgeBatchDelay:      10,
 			PurgeBlockDelay:      10,
@@ -391,6 +392,10 @@ func TestCoordCanForge(t *testing.T) {
 	assert.Equal(t, true, coord.canForge())
 	assert.Equal(t, true, bootCoord.canForge())
 
+	// Anyone can forge but the node MustForgeAtSlotDeadline as set as false
+	coord.cfg.MustForgeAtSlotDeadline = false
+	assert.Equal(t, false, coord.canForge())
+
 	// Slot 3. coordinator bid, so the winner is the coordinator
 	stats.Eth.LastBlock.Num = ethClientSetup.AuctionConstants.GenesisBlockNum +
 		3*int64(ethClientSetup.AuctionConstants.BlocksPerSlot)

coordinator/pipeline.go

@@ -414,7 +414,7 @@ func (p *Pipeline) forgeBatch(batchNum common.BatchNum) (batchInfo *BatchInfo, e
 	var coordIdxs []common.Idx
 
 	// Check if the slot is not yet fulfilled
-	slotCommitted := false
+	slotCommitted := p.cfg.IgnoreSlotCommitment
 	if p.stats.Sync.Auction.CurrentSlot.ForgerCommitment ||
 		p.stats.Sync.Auction.CurrentSlot.SlotNum == p.state.lastSlotForged {
 		slotCommitted = true

coordinator/txmanager.go

@@ -608,7 +608,7 @@ func (t *TxManager) removeBadBatchInfos(ctx context.Context) error {
 func (t *TxManager) canForgeAt(blockNum int64) bool {
 	return canForge(&t.consts.Auction, &t.vars.Auction,
 		&t.stats.Sync.Auction.CurrentSlot, &t.stats.Sync.Auction.NextSlot,
-		t.cfg.ForgerAddress, blockNum)
+		t.cfg.ForgerAddress, blockNum, t.cfg.MustForgeAtSlotDeadline)
 }
 
 func (t *TxManager) mustL1L2Batch(blockNum int64) bool {

node/node.go

@@ -339,6 +339,8 @@ func NewNode(mode Mode, cfg *config.Node) (*Node, error) {
 				L1BatchTimeoutPerc:      cfg.Coordinator.L1BatchTimeoutPerc,
 				ForgeRetryInterval:      cfg.Coordinator.ForgeRetryInterval.Duration,
 				ForgeDelay:              cfg.Coordinator.ForgeDelay.Duration,
+				MustForgeAtSlotDeadline: cfg.Coordinator.MustForgeAtSlotDeadline,
+				IgnoreSlotCommitment:    cfg.Coordinator.IgnoreSlotCommitment,
 				ForgeNoTxsDelay:         cfg.Coordinator.ForgeNoTxsDelay.Duration,
 				SyncRetryInterval:       cfg.Coordinator.SyncRetryInterval.Duration,
 				PurgeByExtDelInterval:   cfg.Coordinator.PurgeByExtDelInterval.Duration,