bridge events

indexer/processor/l1_processor.go

 package processor
 
 import (
+	"bytes"
 	"context"
 	"encoding/hex"
 	"errors"
@@ -22,6 +23,10 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 )
 
+var (
+	ethAddress = common.HexToAddress("0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000")
+)
+
 type L1Contracts struct {
 	OptimismPortal         common.Address
 	L2OutputOracle         common.Address
@@ -122,10 +127,10 @@ func l1ProcessFn(processLog log.Logger, ethClient node.EthClient, l1Contracts L1
 			headerMap[header.Hash()] = header
 		}
 
-		/** Watch for Contract Events **/
+		/** Watch for all Optimism Contract Events **/
 
 		logFilter := ethereum.FilterQuery{FromBlock: headers[0].Number, ToBlock: headers[numHeaders-1].Number, Addresses: contractAddrs}
-		logs, err := rawEthClient.FilterLogs(context.Background(), logFilter)
+		logs, err := rawEthClient.FilterLogs(context.Background(), logFilter) // []types.Log
 		if err != nil {
 			return err
 		}
@@ -135,7 +140,10 @@ func l1ProcessFn(processLog log.Logger, ethClient node.EthClient, l1Contracts L1
 		legacyStateBatches := []*database.LegacyStateBatch{}
 
 		numLogs := len(logs)
+		logsByIndex := make(map[uint]*types.Log, numLogs)
+
 		l1ContractEvents := make([]*database.L1ContractEvent, numLogs)
+		l1ContractEventLogs := make(map[uuid.UUID]*types.Log)
 		l1HeadersOfInterest := make(map[common.Hash]bool)
 		for i, log := range logs {
 			header, ok := headerMap[log.BlockHash]
@@ -144,16 +152,8 @@ func l1ProcessFn(processLog log.Logger, ethClient node.EthClient, l1Contracts L1
 				return errors.New("parsed log with a block hash not in this batch")
 			}
 
-			contractEvent := &database.L1ContractEvent{
-				ContractEvent: database.ContractEvent{
-					GUID:            uuid.New(),
-					BlockHash:       log.BlockHash,
-					TransactionHash: log.TxHash,
-					EventSignature:  log.Topics[0],
-					LogIndex:        uint64(log.Index),
-					Timestamp:       header.Time,
-				},
-			}
+			logsByIndex[log.Index] = &logs[i]
+			contractEvent := &database.L1ContractEvent{ContractEvent: database.ContractEventFromLog(&log, header.Time)}
 
 			l1ContractEvents[i] = contractEvent
 			l1HeadersOfInterest[log.BlockHash] = true
@@ -194,33 +194,25 @@ func l1ProcessFn(processLog log.Logger, ethClient node.EthClient, l1Contracts L1
 
 		// we iterate on the original array to maintain ordering. probably can find a more efficient
 		// way to iterate over the `l1HeadersOfInterest` map while maintaining ordering
-		l1Headers := []*database.L1BlockHeader{}
+		indexedL1Headers := []*database.L1BlockHeader{}
 		for _, header := range headers {
-			blockHash := header.Hash()
-			if _, hasLogs := l1HeadersOfInterest[blockHash]; !hasLogs {
+			_, hasLogs := l1HeadersOfInterest[header.Hash()]
+			if !hasLogs {
 				continue
 			}
 
-			l1Headers = append(l1Headers, &database.L1BlockHeader{
-				BlockHeader: database.BlockHeader{
-					Hash:       blockHash,
-					ParentHash: header.ParentHash,
-					Number:     database.U256{Int: header.Number},
-					Timestamp:  header.Time,
-				},
-			})
+			indexedL1Headers = append(
+				indexedL1Headers,
+				&database.L1BlockHeader{BlockHeader: database.BlockHeaderFromHeader(header)},
+			)
 		}
 
 		/** Update Database **/
 
-		numL1Headers := len(l1Headers)
-		if numL1Headers == 0 {
-			processLog.Info("no l1 blocks of interest")
-			return nil
-		}
-
-		processLog.Info("saving l1 blocks of interest", "size", numL1Headers, "batch_size", numHeaders)
-		err = db.Blocks.StoreL1BlockHeaders(l1Headers)
+		numIndexedL1Headers := len(indexedL1Headers)
+		if numIndexedL1Headers > 0 {
+			processLog.Info("saved l1 blocks of interest within batch", "num", numIndexedL1Headers, "batchSize", numHeaders)
+			err = db.Blocks.StoreL1BlockHeaders(indexedL1Headers)
 			if err != nil {
 				return err
 			}
@@ -250,7 +242,116 @@ func l1ProcessFn(processLog log.Logger, ethClient node.EthClient, l1Contracts L1
 				}
 			}
 
+			// forward along contract events to the bridge processor
+			err = l1BridgeProcessContractEvents(processLog, db, l1ContractEvents, l1ContractEventLogs, logsByIndex)
+			if err != nil {
+				return err
+			}
+		} else {
+			processLog.Info("no l1 blocks of interest within batch")
+		}
+
 		// a-ok!
 		return nil
 	}
 }
+
+func l1BridgeProcessContractEvents(
+	processLog log.Logger,
+	db *database.DB,
+	events []*database.L1ContractEvent,
+	eventLogs map[uuid.UUID]*types.Log,
+	logsByIndex map[uint]*types.Log,
+) error {
+	l1StandardBridgeABI, err := bindings.L1StandardBridgeMetaData.GetAbi()
+	if err != nil {
+		return err
+	}
+
+	l1CrossDomainMessengerABI, err := bindings.L1CrossDomainMessengerMetaData.GetAbi()
+	if err != nil {
+		return err
+	}
+
+	type MessageData struct {
+		Sender       common.Address
+		Message      []byte
+		MessageNonce *big.Int
+		GasLimit     *big.Int
+	}
+
+	type BridgeData struct {
+		From      common.Address
+		To        common.Address
+		Amount    *big.Int
+		ExtraData []byte
+	}
+
+	l1StandardBridgeDeposits := []*database.Deposit{}
+	ethBridgeInitiatedEventSig := l1StandardBridgeABI.Events["ETHBridgeInitiated"].ID
+	sentMessageEventSig := l1CrossDomainMessengerABI.Events["SentMessage"].ID
+	for _, contractEvent := range events {
+		eventSig := contractEvent.EventSignature
+		log := eventLogs[contractEvent.GUID]
+		if eventSig == ethBridgeInitiatedEventSig {
+			// (1) Deconstruct the bridge event
+			var bridgeData BridgeData
+			err = l1StandardBridgeABI.UnpackIntoInterface(&bridgeData, "ETHBridgeInitiated", log.Data)
+			if err != nil || len(log.Topics) != 3 {
+				processLog.Crit("unexpected ETHDepositInitiated log format", "tx", log.TxHash, "err", err)
+				return err
+			}
+
+			// from/to are indexed event fields (not present in the log data)
+			bridgeData.From = common.BytesToAddress(log.Topics[1].Bytes())
+			bridgeData.To = common.BytesToAddress(log.Topics[2].Bytes())
+
+			// (2) Look for the sent message event to extract the associated messager nonce
+			//       - The `SentMessage` event is the second after the bridge initiated event. BridgeInitiated -> Portal#DepositTransaction -> SentMesage ...
+			sentMsgLog := logsByIndex[log.Index+2]
+			if sentMsgLog.Topics[0] != sentMessageEventSig {
+				processLog.Crit("expected CrossDomainMessenger#SentMessage to follow StandardBridge#EthBridgeInitiated event", "event_sig", sentMsgLog.Topics[0], "sent_message_sig", sentMessageEventSig)
+				return errors.New("unexpected bridge event ordering")
+			}
+
+			expectedMsg, err := l1StandardBridgeABI.Pack("finalizeBridgeETH", bridgeData.From, bridgeData.To, bridgeData.Amount, bridgeData.ExtraData)
+			if err != nil {
+				processLog.Crit("unable to create bridge message")
+				return err
+			}
+
+			var sentMsgData MessageData
+			err = l1CrossDomainMessengerABI.UnpackIntoInterface(&sentMsgData, "SentMessage", sentMsgLog.Data)
+			if err != nil {
+				processLog.Crit("unexpected SentMessage log format", "tx", log.TxHash, "err", err)
+				return err
+			} else if !bytes.Equal(sentMsgData.Message, expectedMsg) {
+				processLog.Crit("SentMessage message mismatch", "expected_bridge_msg", hex.EncodeToString(expectedMsg), "event_msg", hex.EncodeToString(sentMsgData.Message))
+				return errors.New("bridge message mismatch")
+			}
+
+			// (3) Record the deposit
+			l1StandardBridgeDeposits = append(l1StandardBridgeDeposits, &database.Deposit{
+				GUID:                 uuid.New(),
+				InitiatedL1EventGUID: contractEvent.GUID,
+				SentMessageNonce:     database.U256{Int: sentMsgData.MessageNonce},
+				TokenPair:            database.TokenPair{L1TokenAddress: ethAddress, L2TokenAddress: ethAddress},
+				Tx: database.Transaction{
+					FromAddress: common.BytesToAddress(log.Topics[1].Bytes()),
+					ToAddress:   common.BytesToAddress(log.Topics[2].Bytes()),
+					Amount:      database.U256{Int: bridgeData.Amount},
+					Data:        bridgeData.ExtraData,
+					Timestamp:   contractEvent.Timestamp,
+				},
+			})
+		}
+	}
+
+	if len(l1StandardBridgeDeposits) > 0 {
+		processLog.Info("detected L1StandardBridge deposits", "num", len(l1StandardBridgeDeposits))
+		return db.Bridge.StoreDeposits(l1StandardBridgeDeposits)
+	}
+
+	// no-op
+	return nil
+}

indexer/processor/l2_processor.go

 package processor
 
 import (
+	"bytes"
 	"context"
 	"errors"
+	"math/big"
 	"reflect"
 
 	"github.com/ethereum-optimism/optimism/indexer/database"
 	"github.com/ethereum-optimism/optimism/indexer/node"
+	"github.com/ethereum-optimism/optimism/op-bindings/bindings"
 	"github.com/google/uuid"
 
 	"github.com/ethereum/go-ethereum"
@@ -125,7 +128,10 @@ func l2ProcessFn(processLog log.Logger, ethClient node.EthClient, l2Contracts L2
 		}
 
 		numLogs := len(logs)
+		logsByIndex := make(map[uint]*types.Log, numLogs)
+
 		l2ContractEvents := make([]*database.L2ContractEvent, numLogs)
+		l2ContractEventLogs := make(map[uuid.UUID]*types.Log)
 		for i, log := range logs {
 			header, ok := l2HeaderMap[log.BlockHash]
 			if !ok {
@@ -133,16 +139,11 @@ func l2ProcessFn(processLog log.Logger, ethClient node.EthClient, l2Contracts L2
 				return errors.New("parsed log with a block hash not in this batch")
 			}
 
-			l2ContractEvents[i] = &database.L2ContractEvent{
-				ContractEvent: database.ContractEvent{
-					GUID:            uuid.New(),
-					BlockHash:       log.BlockHash,
-					TransactionHash: log.TxHash,
-					EventSignature:  log.Topics[0],
-					LogIndex:        uint64(log.Index),
-					Timestamp:       header.Time,
-				},
-			}
+			logsByIndex[log.Index] = &logs[i]
+			contractEvent := &database.L2ContractEvent{ContractEvent: database.ContractEventFromLog(&log, header.Time)}
+
+			l2ContractEvents[i] = contractEvent
+			l2ContractEventLogs[contractEvent.GUID] = &logs[i]
 		}
 
 		/** Update Database **/
@@ -159,9 +160,125 @@ func l2ProcessFn(processLog log.Logger, ethClient node.EthClient, l2Contracts L2
 			if err != nil {
 				return err
 			}
+
+			// forward along contract events to the bridge processor
+			err = l2BridgeProcessContractEvents(processLog, db, ethClient, l2ContractEvents, l2ContractEventLogs, logsByIndex)
+			if err != nil {
+				return err
+			}
 		}
 
 		// a-ok!
 		return nil
 	}
 }
+
+func l2BridgeProcessContractEvents(
+	processLog log.Logger,
+	db *database.DB,
+	ethClient node.EthClient,
+	events []*database.L2ContractEvent,
+	eventLogs map[uuid.UUID]*types.Log,
+	logsByIndex map[uint]*types.Log,
+) error {
+	rawEthClient := ethclient.NewClient(ethClient.RawRpcClient())
+
+	l2StandardBridgeABI, err := bindings.L2StandardBridgeMetaData.GetAbi()
+	if err != nil {
+		return err
+	}
+
+	l2CrossDomainMessengerABI, err := bindings.L2CrossDomainMessengerMetaData.GetAbi()
+	if err != nil {
+		return err
+	}
+
+	type BridgeData struct {
+		From      common.Address
+		To        common.Address
+		Amount    *big.Int
+		ExtraData []byte
+	}
+
+	numFinalizedDeposits := 0
+	ethBridgeFinalizedEventSig := l2StandardBridgeABI.Events["ETHBridgeFinalized"].ID
+	relayedMessageEventSig := l2CrossDomainMessengerABI.Events["RelayedMessage"].ID
+	relayMessageMethod := l2CrossDomainMessengerABI.Methods["relayMessage"]
+	for _, contractEvent := range events {
+		eventSig := contractEvent.EventSignature
+		log := eventLogs[contractEvent.GUID]
+		if eventSig == ethBridgeFinalizedEventSig {
+			// (1) Ensure the RelayedMessage follows the log right after the bridge event
+			relayedMsgLog := logsByIndex[log.Index+1]
+			if relayedMsgLog.Topics[0] != relayedMessageEventSig {
+				processLog.Crit("expected CrossDomainMessenger#RelayedMessage following StandardBridge#EthBridgeFinalized event", "event_sig", relayedMsgLog.Topics[0], "relayed_message_sig", relayedMessageEventSig)
+				return errors.New("unexpected bridge event ordering")
+			}
+
+			// unfortunately there's no way to extract the nonce on the relayed message event. we can
+			// extract the nonce by unpacking the transaction input for the `relayMessage` transaction
+			tx, isPending, err := rawEthClient.TransactionByHash(context.Background(), relayedMsgLog.TxHash)
+			if err != nil || isPending {
+				processLog.Crit("CrossDomainMessager#relayeMessage transaction query err or found pending", err, "err", "isPending", isPending)
+				return errors.New("unable to query relayMessage tx")
+			}
+
+			txData := tx.Data()
+			fnSelector := txData[:4]
+			if !bytes.Equal(fnSelector, relayMessageMethod.ID) {
+				processLog.Crit("expected relayMessage function selector")
+				return errors.New("RelayMessage log does not match relayMessage transaction")
+			}
+
+			fnData := txData[4:]
+			inputsMap := make(map[string]interface{})
+			err = relayMessageMethod.Inputs.UnpackIntoMap(inputsMap, fnData)
+			if err != nil {
+				processLog.Crit("unable to unpack CrossDomainMessenger#relayMessage function data", "err", err)
+				return err
+			}
+
+			nonce, ok := inputsMap["_nonce"].(*big.Int)
+			if !ok {
+				processLog.Crit("unable to extract _nonce from CrossDomainMessenger#relayMessage function call")
+				return errors.New("unable to extract relayMessage nonce")
+			}
+
+			// (2) Mark initiated L1 deposit as finalized
+			deposit, err := db.Bridge.DepositByMessageNonce(nonce)
+			if err != nil {
+				processLog.Error("error querying initiated deposit messsage using nonce", "nonce", nonce)
+				return err
+			} else if deposit == nil {
+				latestNonce, err := db.Bridge.LatestDepositMessageNonce()
+				if err != nil {
+					return err
+				}
+
+				// check if the the L1Processor is behind or really has missed an event
+				if latestNonce == nil || nonce.Cmp(latestNonce) > 0 {
+					processLog.Warn("behind on indexed L1 deposits", "deposit_message_nonce", nonce, "latest_deposit_message_nonce", latestNonce)
+					return errors.New("waiting for L1Processor to catch up")
+				} else {
+					processLog.Crit("missing indexed deposit for this finalization event", "deposit_message_nonce", nonce, "tx_hash", log.TxHash, "log_index", log.Index)
+					return errors.New("missing deposit message")
+				}
+			}
+
+			err = db.Bridge.MarkFinalizedDepositEvent(deposit.GUID, contractEvent.GUID)
+			if err != nil {
+				processLog.Error("error finalizing deposit", "err", err)
+				return err
+			}
+
+			numFinalizedDeposits++
+		}
+	}
+
+	// a-ok!
+	if numFinalizedDeposits > 0 {
+		processLog.Info("finalized deposits", "num", numFinalizedDeposits)
+	}
+
+	return nil
+}