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.

eth/wdelayer_test.go

@@ -41,7 +41,7 @@ func TestWDelayerSetHermezGovernanceDAOAddress(t *testing.T) {
 	auxAddress, err := wdelayerClientTest.WDelayerGetHermezGovernanceDAOAddress()
 	require.Nil(t, err)
 	assert.Equal(t, &auxAddressConst, auxAddress)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.NewHermezGovernanceDAOAddress[0].NewHermezGovernanceDAOAddress)
 	wdelayerClientAux, err := NewWDelayerClient(ethereumClientAux, wdelayerTestAddressConst)
@@ -64,7 +64,7 @@ func TestWDelayerSetHermezKeeperAddress(t *testing.T) {
 	auxAddress, err := wdelayerClientTest.WDelayerGetHermezKeeperAddress()
 	require.Nil(t, err)
 	assert.Equal(t, &auxAddressConst, auxAddress)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.NewHermezKeeperAddress[0].NewHermezKeeperAddress)
 	wdelayerClientAux, err := NewWDelayerClient(ethereumClientAux, wdelayerTestAddressConst)
@@ -87,7 +87,7 @@ func TestWDelayerSetWhiteHackGroupAddress(t *testing.T) {
 	auxAddress, err := wdelayerClientTest.WDelayerGetWhiteHackGroupAddress()
 	require.Nil(t, err)
 	assert.Equal(t, &auxAddressConst, auxAddress)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.NewWhiteHackGroupAddress[0].NewWhiteHackGroupAddress)
 	wdelayerClientAux, err := NewWDelayerClient(ethereumClientAux, wdelayerTestAddressConst)
@@ -116,7 +116,7 @@ func TestWDelayerChangeWithdrawalDelay(t *testing.T) {
 	withdrawalDelay, err := wdelayerClientTest.WDelayerGetWithdrawalDelay()
 	require.Nil(t, err)
 	assert.Equal(t, newWithdrawalDelay, withdrawalDelay)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, newWithdrawalDelay.Uint64(), wdelayerEvents.NewWithdrawalDelay[0].WithdrawalDelay)
 }
@@ -128,7 +128,7 @@ func TestWDelayerDeposit(t *testing.T) {
 	require.Nil(t, err)
 	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Deposit[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Deposit[0].Owner)
@@ -152,7 +152,7 @@ func TestWDelayerWithdrawal(t *testing.T) {
 	addBlock(ethClientDialURL)
 	_, err = wdelayerClientTest.WDelayerWithdrawal(auxAddressConst, tokenHEZAddressConst)
 	require.Nil(t, err)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Withdraw[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Withdraw[0].Owner)
@@ -166,7 +166,7 @@ func TestWDelayerSecondDeposit(t *testing.T) {
 	require.Nil(t, err)
 	_, err = wdelayerClientHermez.WDelayerDeposit(auxAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, amount, wdelayerEvents.Deposit[0].Amount)
 	assert.Equal(t, auxAddressConst, wdelayerEvents.Deposit[0].Owner)
@@ -181,7 +181,7 @@ func TestWDelayerEnableEmergencyMode(t *testing.T) {
 	emergencyMode, err := wdelayerClientTest.WDelayerIsEmergencyMode()
 	require.Nil(t, err)
 	assert.Equal(t, true, emergencyMode)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	auxEvent := new(WDelayerEventEmergencyModeEnabled)
 	assert.Equal(t, auxEvent, &wdelayerEvents.EmergencyModeEnabled[0])
@@ -208,7 +208,7 @@ func TestWDelayerEscapeHatchWithdrawal(t *testing.T) {
 	addTime(seconds, ethClientDialURL)
 	_, err = wdelayerClientWhite.WDelayerEscapeHatchWithdrawal(governanceAddressConst, tokenHEZAddressConst, amount)
 	require.Nil(t, err)
-	currentBlockNum, _ := wdelayerClientTest.client.EthCurrentBlock()
+	currentBlockNum, _ := wdelayerClientTest.client.EthLastBlock()
 	wdelayerEvents, _, _ := wdelayerClientTest.WDelayerEventsByBlock(currentBlockNum)
 	assert.Equal(t, tokenHEZAddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].Token)
 	assert.Equal(t, governanceAddressConst, wdelayerEvents.EscapeHatchWithdrawal[0].To)