Redo coordinator structure, connect API to node

- API:
	- Modify the constructor so that hardcoded rollup constants don't need
	  to be passed (introduce a `Config` and use `configAPI` internally)
- Common:
	- Update rollup constants with proper *big.Int when required
	- Add BidCoordinator and Slot structs used by the HistoryDB and
	  Synchronizer.
	- Add helper methods to AuctionConstants
	- AuctionVariables: Add column `DefaultSlotSetBidSlotNum` (in the SQL
	  table: `default_slot_set_bid_slot_num`), which indicates at which
	  slotNum does the `DefaultSlotSetBid` specified starts applying.
- Config:
	- Move coordinator exclusive configuration from the node config to the
	  coordinator config
- Coordinator:
	- Reorganize the code towards having the goroutines started and stopped
	  from the coordinator itself instead of the node.
	- Remove all stop and stopped channels, and use context.Context and
	  sync.WaitGroup instead.
	- Remove BatchInfo setters and assing variables directly
	- In ServerProof and ServerProofPool use context instead stop channel.
	- Use message passing to notify the coordinator about sync updates and
	  reorgs
	- Introduce the Pipeline, which can be started and stopped by the
	  Coordinator
	- Introduce the TxManager, which manages ethereum transactions (the
	  TxManager is also in charge of making the forge call to the rollup
	  smart contract).  The TxManager keeps ethereum transactions and:
	  	1. Waits for the transaction to be accepted
		2. Waits for the transaction to be confirmed for N blocks
	- In forge logic, first prepare a batch and then wait for an available
	  server proof to have all work ready once the proof server is ready.
	- Remove the `isForgeSequence` method which was querying the smart
	  contract, and instead use notifications sent by the Synchronizer to
	  figure out if it's forging time.
	- Update test (which is a minimal test to manually see if the
	  coordinator starts)
- HistoryDB:
	- Add method to get the number of batches in a slot (used to detect when
	  a slot has passed the bid winner forging deadline)
	- Add method to get the best bid and associated coordinator of a slot
	  (used to detect the forgerAddress that can forge the slot)
- General:
	- Rename some instances of `currentBlock` to `lastBlock` to be more
	  clear.
- Node:
	- Connect the API to the node and call the methods to update cached
	  state when the sync advances blocks.
	- Call methods to update Coordinator state when the sync advances blocks
	  and finds reorgs.
- Synchronizer:
	- Add Auction field in the Stats, which contain the current slot with
	  info about highest bidder and other related info required to know who
	  can forge in the current block.
	- Better organization of cached state:
		- On Sync, update the internal cached state
		- On Init or Reorg, load the state from HistoryDB into the
		  internal cached state.

api/api.go

@@ -42,7 +42,7 @@ func NewAPI(
 	hdb *historydb.HistoryDB,
 	sdb *statedb.StateDB,
 	l2db *l2db.L2DB,
-	config *configAPI,
+	config *Config,
 ) (*API, error) {
 	// Check input
 	// TODO: is stateDB only needed for explorer endpoints or for both?
@@ -54,8 +54,12 @@ func NewAPI(
 	}
 
 	a := &API{
-		h:  hdb,
-		cg: config,
+		h: hdb,
+		cg: &configAPI{
+			RollupConstants:   *newRollupConstants(config.RollupConstants),
+			AuctionConstants:  config.AuctionConstants,
+			WDelayerConstants: config.WDelayerConstants,
+		},
 		s:  sdb,
 		l2: l2db,
 	}

api/api_test.go

@@ -219,7 +219,12 @@ func TestMain(m *testing.M) {
 	test.WipeDB(l2DB.DB()) // this will clean HistoryDB and L2DB
 
 	// Config (smart contract constants)
-	config = getConfigTest()
+	_config := getConfigTest()
+	config = configAPI{
+		RollupConstants:   *newRollupConstants(_config.RollupConstants),
+		AuctionConstants:  _config.AuctionConstants,
+		WDelayerConstants: _config.WDelayerConstants,
+	}
 
 	// API
 	apiGin := gin.Default()
@@ -230,7 +235,7 @@ func TestMain(m *testing.M) {
 		hdb,
 		sdb,
 		l2DB,
-		&config,
+		&_config,
 	)
 	if err != nil {
 		panic(err)
@@ -295,7 +300,8 @@ func TestMain(m *testing.M) {
 	}
 	for _, block := range blocksData {
 		// Insert block into HistoryDB
-		if err := api.h.AddBlockSCData(&block); err != nil { //nolint:gosec block is used as read only in the function
+		// nolint reason: block is used as read only in the function
+		if err := api.h.AddBlockSCData(&block); err != nil { //nolint:gosec
 			panic(err)
 		}
 		// Extract data

api/config.go

@@ -26,6 +26,33 @@ type rollupConstants struct {
 	ExchangeMultiplier      int                    `json:"exchangeMultiplier"`
 }
 
+func newRollupConstants(publicConstants common.RollupConstants) *rollupConstants {
+	return &rollupConstants{
+		PublicConstants:         publicConstants,
+		MaxFeeIdxCoordinator:    common.RollupConstMaxFeeIdxCoordinator,
+		ReservedIdx:             common.RollupConstReservedIDx,
+		ExitIdx:                 common.RollupConstExitIDx,
+		LimitLoadAmount:         common.RollupConstLimitLoadAmount,
+		LimitL2TransferAmount:   common.RollupConstLimitL2TransferAmount,
+		LimitTokens:             common.RollupConstLimitTokens,
+		L1CoordinatorTotalBytes: common.RollupConstL1CoordinatorTotalBytes,
+		L1UserTotalBytes:        common.RollupConstL1UserTotalBytes,
+		MaxL1UserTx:             common.RollupConstMaxL1UserTx,
+		MaxL1Tx:                 common.RollupConstMaxL1Tx,
+		InputSHAConstantBytes:   common.RollupConstInputSHAConstantBytes,
+		NumBuckets:              common.RollupConstNumBuckets,
+		MaxWithdrawalDelay:      common.RollupConstMaxWithdrawalDelay,
+		ExchangeMultiplier:      common.RollupConstExchangeMultiplier,
+	}
+}
+
+// Config of the API
+type Config struct {
+	RollupConstants   common.RollupConstants
+	AuctionConstants  common.AuctionConstants
+	WDelayerConstants common.WDelayerConstants
+}
+
 type configAPI struct {
 	RollupConstants   rollupConstants          `json:"hermez"`
 	AuctionConstants  common.AuctionConstants  `json:"auction"`

api/config_test.go

@@ -9,22 +9,9 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func getConfigTest() configAPI {
-	var config configAPI
+func getConfigTest() Config {
+	var config Config
 
-	config.RollupConstants.ExchangeMultiplier = common.RollupConstExchangeMultiplier
-	config.RollupConstants.ExitIdx = common.RollupConstExitIDx
-	config.RollupConstants.ReservedIdx = common.RollupConstReservedIDx
-	config.RollupConstants.LimitLoadAmount, _ = new(big.Int).SetString("340282366920938463463374607431768211456", 10)
-	config.RollupConstants.LimitL2TransferAmount, _ = new(big.Int).SetString("6277101735386680763835789423207666416102355444464034512896", 10)
-	config.RollupConstants.LimitTokens = common.RollupConstLimitTokens
-	config.RollupConstants.L1CoordinatorTotalBytes = common.RollupConstL1CoordinatorTotalBytes
-	config.RollupConstants.L1UserTotalBytes = common.RollupConstL1UserTotalBytes
-	config.RollupConstants.MaxL1UserTx = common.RollupConstMaxL1UserTx
-	config.RollupConstants.MaxL1Tx = common.RollupConstMaxL1Tx
-	config.RollupConstants.InputSHAConstantBytes = common.RollupConstInputSHAConstantBytes
-	config.RollupConstants.NumBuckets = common.RollupConstNumBuckets
-	config.RollupConstants.MaxWithdrawalDelay = common.RollupConstMaxWithdrawalDelay
 	var rollupPublicConstants common.RollupConstants
 	rollupPublicConstants.AbsoluteMaxL1L2BatchTimeout = 240
 	rollupPublicConstants.HermezAuctionContract = ethCommon.HexToAddress("0x500D1d6A4c7D8Ae28240b47c8FCde034D827fD5e")
@@ -50,7 +37,7 @@ func getConfigTest() configAPI {
 	wdelayerConstants.MaxEmergencyModeTime = uint64(1000000)
 	wdelayerConstants.MaxWithdrawalDelay = uint64(10000000)
 
-	config.RollupConstants.PublicConstants = rollupPublicConstants
+	config.RollupConstants = rollupPublicConstants
 	config.AuctionConstants = auctionConstants
 	config.WDelayerConstants = wdelayerConstants
 

api/parsers.go

@@ -51,17 +51,20 @@ func parsePagination(c querier) (fromItem *uint, order string, limit *uint, err
 	return fromItem, order, limit, nil
 }
 
-func parseQueryUint(name string, dflt *uint, min, max uint, c querier) (*uint, error) { //nolint:SA4009 res may be not overwriten
+// nolint reason: res may be not overwriten
+func parseQueryUint(name string, dflt *uint, min, max uint, c querier) (*uint, error) { //nolint:SA4009
 	str := c.Query(name)
 	return stringToUint(str, name, dflt, min, max)
 }
 
-func parseQueryInt64(name string, dflt *int64, min, max int64, c querier) (*int64, error) { //nolint:SA4009 res may be not overwriten
+// nolint reason: res may be not overwriten
+func parseQueryInt64(name string, dflt *int64, min, max int64, c querier) (*int64, error) { //nolint:SA4009
 	str := c.Query(name)
 	return stringToInt64(str, name, dflt, min, max)
 }
 
-func parseQueryBool(name string, dflt *bool, c querier) (*bool, error) { //nolint:SA4009 res may be not overwriten
+// nolint reason: res may be not overwriten
+func parseQueryBool(name string, dflt *bool, c querier) (*bool, error) { //nolint:SA4009
 	str := c.Query(name)
 	if str == "" {
 		return dflt, nil
@@ -296,12 +299,14 @@ func parseParamIdx(c paramer) (*common.Idx, error) {
 	return stringToIdx(idxStr, name)
 }
 
-func parseParamUint(name string, dflt *uint, min, max uint, c paramer) (*uint, error) { //nolint:SA4009 res may be not overwriten
+// nolint reason: res may be not overwriten
+func parseParamUint(name string, dflt *uint, min, max uint, c paramer) (*uint, error) { //nolint:SA4009
 	str := c.Param(name)
 	return stringToUint(str, name, dflt, min, max)
 }
 
-func parseParamInt64(name string, dflt *int64, min, max int64, c paramer) (*int64, error) { //nolint:SA4009 res may be not overwriten
+// nolint reason: res may be not overwriten
+func parseParamInt64(name string, dflt *int64, min, max int64, c paramer) (*int64, error) { //nolint:SA4009
 	str := c.Param(name)
 	return stringToInt64(str, name, dflt, min, max)
 }