Store mapping from hashes for Ethereum transactions to Filecoin Message Cids

.circleci/config.yml

@@ -740,6 +740,11 @@ workflows:
           suite: itest-eth_filter
           target: "./itests/eth_filter_test.go"
       
+      - test:
+          name: test-itest-eth_hash_lookup
+          suite: itest-eth_hash_lookup
+          target: "./itests/eth_hash_lookup_test.go"
+      
       - test:
           name: test-itest-eth_transactions
           suite: itest-eth_transactions

api/api_full.go

@@ -778,6 +778,7 @@ type FullNode interface {
 	EthGetBlockByHash(ctx context.Context, blkHash ethtypes.EthHash, fullTxInfo bool) (ethtypes.EthBlock, error)                               //perm:read
 	EthGetBlockByNumber(ctx context.Context, blkNum string, fullTxInfo bool) (ethtypes.EthBlock, error)                                        //perm:read
 	EthGetTransactionByHash(ctx context.Context, txHash *ethtypes.EthHash) (*ethtypes.EthTx, error)                                            //perm:read
+	EthGetTransactionHashByCid(ctx context.Context, cid cid.Cid) (*ethtypes.EthHash, error)                                                    //perm:read
 	EthGetTransactionCount(ctx context.Context, sender ethtypes.EthAddress, blkOpt string) (ethtypes.EthUint64, error)                         //perm:read
 	EthGetTransactionReceipt(ctx context.Context, txHash ethtypes.EthHash) (*EthTxReceipt, error)                                              //perm:read
 	EthGetTransactionByBlockHashAndIndex(ctx context.Context, blkHash ethtypes.EthHash, txIndex ethtypes.EthUint64) (ethtypes.EthTx, error)    //perm:read

api/mocks/mock_full.go

@@ -1252,6 +1252,21 @@ func (mr *MockFullNodeMockRecorder) EthGetTransactionCount(arg0, arg1, arg2 inte
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "EthGetTransactionCount", reflect.TypeOf((*MockFullNode)(nil).EthGetTransactionCount), arg0, arg1, arg2)
 }
 
+// EthGetTransactionHashByCid mocks base method.
+func (m *MockFullNode) EthGetTransactionHashByCid(arg0 context.Context, arg1 cid.Cid) (*ethtypes.EthHash, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "EthGetTransactionHashByCid", arg0, arg1)
+	ret0, _ := ret[0].(*ethtypes.EthHash)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// EthGetTransactionHashByCid indicates an expected call of EthGetTransactionHashByCid.
+func (mr *MockFullNodeMockRecorder) EthGetTransactionHashByCid(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "EthGetTransactionHashByCid", reflect.TypeOf((*MockFullNode)(nil).EthGetTransactionHashByCid), arg0, arg1)
+}
+
 // EthGetTransactionReceipt mocks base method.
 func (m *MockFullNode) EthGetTransactionReceipt(arg0 context.Context, arg1 ethtypes.EthHash) (*api.EthTxReceipt, error) {
 	m.ctrl.T.Helper()

api/proxy_gen.go

@@ -263,6 +263,8 @@ type FullNodeStruct struct {
 
 		EthGetTransactionCount func(p0 context.Context, p1 ethtypes.EthAddress, p2 string) (ethtypes.EthUint64, error) `perm:"read"`
 
+		EthGetTransactionHashByCid func(p0 context.Context, p1 cid.Cid) (*ethtypes.EthHash, error) `perm:"read"`
+
 		EthGetTransactionReceipt func(p0 context.Context, p1 ethtypes.EthHash) (*EthTxReceipt, error) `perm:"read"`
 
 		EthMaxPriorityFeePerGas func(p0 context.Context) (ethtypes.EthBigInt, error) `perm:"read"`
@@ -2172,6 +2174,17 @@ func (s *FullNodeStub) EthGetTransactionCount(p0 context.Context, p1 ethtypes.Et
 	return *new(ethtypes.EthUint64), ErrNotSupported
 }
 
+func (s *FullNodeStruct) EthGetTransactionHashByCid(p0 context.Context, p1 cid.Cid) (*ethtypes.EthHash, error) {
+	if s.Internal.EthGetTransactionHashByCid == nil {
+		return nil, ErrNotSupported
+	}
+	return s.Internal.EthGetTransactionHashByCid(p0, p1)
+}
+
+func (s *FullNodeStub) EthGetTransactionHashByCid(p0 context.Context, p1 cid.Cid) (*ethtypes.EthHash, error) {
+	return nil, ErrNotSupported
+}
+
 func (s *FullNodeStruct) EthGetTransactionReceipt(p0 context.Context, p1 ethtypes.EthHash) (*EthTxReceipt, error) {
 	if s.Internal.EthGetTransactionReceipt == nil {
 		return nil, ErrNotSupported

chain/eth_transaction_hash_lookup.go

@@ -0,0 +1,162 @@
+package chain
+
+import (
+	"database/sql"
+	"math"
+
+	"github.com/ipfs/go-cid"
+	_ "github.com/mattn/go-sqlite3"
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-state-types/abi"
+
+	"github.com/filecoin-project/lotus/chain/types/ethtypes"
+)
+
+var pragmas = []string{
+	"PRAGMA synchronous = normal",
+	"PRAGMA temp_store = memory",
+	"PRAGMA mmap_size = 30000000000",
+	"PRAGMA page_size = 32768",
+	"PRAGMA auto_vacuum = NONE",
+	"PRAGMA automatic_index = OFF",
+	"PRAGMA journal_mode = WAL",
+	"PRAGMA read_uncommitted = ON",
+}
+
+var ddls = []string{
+	`CREATE TABLE IF NOT EXISTS tx_hash_lookup (
+		hash TEXT PRIMARY KEY,
+		cid TEXT NOT NULL,
+		epoch INT NOT NULL
+	)`,
+
+	// metadata containing version of schema
+	`CREATE TABLE IF NOT EXISTS _meta (
+    	version UINT64 NOT NULL UNIQUE
+	)`,
+
+	// version 1.
+	`INSERT OR IGNORE INTO _meta (version) VALUES (1)`,
+}
+
+const schemaVersion = 1
+const MemPoolEpoch = math.MaxInt64
+
+const (
+	insertTxHash = `INSERT INTO tx_hash_lookup
+	(hash, cid, epoch)
+	VALUES(?, ?, ?)
+	ON CONFLICT (hash) DO UPDATE SET epoch = EXCLUDED.epoch
+	WHERE epoch > EXCLUDED.epoch`
+)
+
+type TransactionHashLookup struct {
+	db *sql.DB
+}
+
+func (ei *TransactionHashLookup) InsertTxHash(txHash ethtypes.EthHash, c cid.Cid, epoch int64) error {
+	hashEntry, err := ei.db.Prepare(insertTxHash)
+	if err != nil {
+		return xerrors.Errorf("prepare insert event: %w", err)
+	}
+
+	_, err = hashEntry.Exec(txHash.String(), c.String(), epoch)
+	return err
+}
+
+func (ei *TransactionHashLookup) LookupCidFromTxHash(txHash ethtypes.EthHash) (cid.Cid, error) {
+	q, err := ei.db.Query("SELECT cid FROM tx_hash_lookup WHERE hash = :hash;", sql.Named("hash", txHash.String()))
+	if err != nil {
+		return cid.Undef, err
+	}
+
+	var c string
+	if !q.Next() {
+		return cid.Undef, xerrors.Errorf("transaction hash %s not found", txHash.String())
+	}
+	err = q.Scan(&c)
+	if err != nil {
+		return cid.Undef, err
+	}
+	return cid.Decode(c)
+}
+
+func (ei *TransactionHashLookup) LookupTxHashFromCid(c cid.Cid) (ethtypes.EthHash, error) {
+	q, err := ei.db.Query("SELECT hash FROM tx_hash_lookup WHERE cid = :cid;", sql.Named("cid", c.String()))
+	if err != nil {
+		return ethtypes.EmptyEthHash, err
+	}
+
+	var hashString string
+	if !q.Next() {
+		return ethtypes.EmptyEthHash, xerrors.Errorf("transaction hash %s not found", c.String())
+	}
+	err = q.Scan(&hashString)
+	if err != nil {
+		return ethtypes.EmptyEthHash, err
+	}
+	return ethtypes.ParseEthHash(hashString)
+}
+
+func (ei *TransactionHashLookup) RemoveEntriesOlderThan(epoch abi.ChainEpoch) (int64, error) {
+	res, err := ei.db.Exec("DELETE FROM tx_hash_lookup WHERE epoch < :epoch;", sql.Named("epoch", epoch))
+	if err != nil {
+		return 0, err
+	}
+
+	return res.RowsAffected()
+}
+
+func NewTransactionHashLookup(path string) (*TransactionHashLookup, error) {
+	db, err := sql.Open("sqlite3", path+"?mode=rwc")
+	if err != nil {
+		return nil, xerrors.Errorf("open sqlite3 database: %w", err)
+	}
+
+	for _, pragma := range pragmas {
+		if _, err := db.Exec(pragma); err != nil {
+			_ = db.Close()
+			return nil, xerrors.Errorf("exec pragma %q: %w", pragma, err)
+		}
+	}
+
+	q, err := db.Query("SELECT name FROM sqlite_master WHERE type='table' AND name='_meta';")
+	if err == sql.ErrNoRows || !q.Next() {
+		// empty database, create the schema
+		for _, ddl := range ddls {
+			if _, err := db.Exec(ddl); err != nil {
+				_ = db.Close()
+				return nil, xerrors.Errorf("exec ddl %q: %w", ddl, err)
+			}
+		}
+	} else if err != nil {
+		_ = db.Close()
+		return nil, xerrors.Errorf("looking for _meta table: %w", err)
+	} else {
+		// Ensure we don't open a database from a different schema version
+
+		row := db.QueryRow("SELECT max(version) FROM _meta")
+		var version int
+		err := row.Scan(&version)
+		if err != nil {
+			_ = db.Close()
+			return nil, xerrors.Errorf("invalid database version: no version found")
+		}
+		if version != schemaVersion {
+			_ = db.Close()
+			return nil, xerrors.Errorf("invalid database version: got %d, expected %d", version, schemaVersion)
+		}
+	}
+
+	return &TransactionHashLookup{
+		db: db,
+	}, nil
+}
+
+func (ei *TransactionHashLookup) Close() error {
+	if ei.db == nil {
+		return nil
+	}
+	return ei.db.Close()
+}

chain/events/filter/mempool.go

@@ -5,7 +5,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/ipfs/go-cid"
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/lotus/api"
@@ -18,7 +17,7 @@ type MemPoolFilter struct {
 	ch         chan<- interface{}
 
 	mu        sync.Mutex
-	collected []cid.Cid
+	collected []*types.SignedMessage
 	lastTaken time.Time
 }
 
@@ -55,10 +54,10 @@ func (f *MemPoolFilter) CollectMessage(ctx context.Context, msg *types.SignedMes
 		copy(f.collected, f.collected[1:])
 		f.collected = f.collected[:len(f.collected)-1]
 	}
-	f.collected = append(f.collected, msg.Cid())
+	f.collected = append(f.collected, msg)
 }
 
-func (f *MemPoolFilter) TakeCollectedMessages(context.Context) []cid.Cid {
+func (f *MemPoolFilter) TakeCollectedMessages(context.Context) []*types.SignedMessage {
 	f.mu.Lock()
 	collected := f.collected
 	f.collected = nil

chain/types/ethtypes/eth_transactions.go

@@ -231,6 +231,36 @@ func (tx *EthTxArgs) ToRlpUnsignedMsg() ([]byte, error) {
 	return append([]byte{0x02}, encoded...), nil
 }
 
+func (tx *EthTx) ToEthTxArgs() EthTxArgs {
+	return EthTxArgs{
+		ChainID:              int(tx.ChainID),
+		Nonce:                int(tx.Nonce),
+		To:                   tx.To,
+		Value:                big.Int(tx.Value),
+		MaxFeePerGas:         big.Int(tx.MaxFeePerGas),
+		MaxPriorityFeePerGas: big.Int(tx.MaxPriorityFeePerGas),
+		GasLimit:             int(tx.Gas),
+		Input:                tx.Input,
+		V:                    big.Int(tx.V),
+		R:                    big.Int(tx.R),
+		S:                    big.Int(tx.S),
+	}
+}
+
+func (tx *EthTx) TxHash() (EthHash, error) {
+	ethTxArgs := tx.ToEthTxArgs()
+	return (&ethTxArgs).TxHash()
+}
+
+func (tx *EthTxArgs) TxHash() (EthHash, error) {
+	rlp, err := tx.ToRlpSignedMsg()
+	if err != nil {
+		return EmptyEthHash, err
+	}
+
+	return EthHashFromTxBytes(rlp), nil
+}
+
 func (tx *EthTxArgs) ToRlpSignedMsg() ([]byte, error) {
 	packed1, err := tx.packTxFields()
 	if err != nil {

chain/types/ethtypes/eth_types.go

@@ -392,10 +392,21 @@ func ParseEthHash(s string) (EthHash, error) {
 	return h, nil
 }
 
+func EthHashFromTxBytes(b []byte) EthHash {
+	hasher := sha3.NewLegacyKeccak256()
+	hasher.Write(b)
+	hash := hasher.Sum(nil)
+
+	var ethHash EthHash
+	copy(ethHash[:], hash)
+	return ethHash
+}
+
 func (h EthHash) String() string {
 	return "0x" + hex.EncodeToString(h[:])
 }
 
+// Should ONLY be used for blocks and Filecoin messages. Eth transactions expect a different hashing scheme.
 func (h EthHash) ToCid() cid.Cid {
 	// err is always nil
 	mh, _ := multihash.EncodeName(h[:], "blake2b-256")
@@ -556,7 +567,7 @@ type EthLog struct {
 	// The index corresponds to the sequence of messages produced by ChainGetParentMessages
 	TransactionIndex EthUint64 `json:"transactionIndex"`
 
-	// TransactionHash is the cid of the message that produced the event log.
+	// TransactionHash is the hash of the RLP message that produced the event log.
 	TransactionHash EthHash `json:"transactionHash"`
 
 	// BlockHash is the hash of the tipset containing the message that produced the log.

documentation/en/api-v1-unstable-methods.md

@@ -88,6 +88,7 @@
   * [EthGetTransactionByBlockNumberAndIndex](#EthGetTransactionByBlockNumberAndIndex)
   * [EthGetTransactionByHash](#EthGetTransactionByHash)
   * [EthGetTransactionCount](#EthGetTransactionCount)
+  * [EthGetTransactionHashByCid](#EthGetTransactionHashByCid)
   * [EthGetTransactionReceipt](#EthGetTransactionReceipt)
   * [EthMaxPriorityFeePerGas](#EthMaxPriorityFeePerGas)
   * [EthNewBlockFilter](#EthNewBlockFilter)
@@ -2778,6 +2779,22 @@ Inputs:
 
 Response: `"0x5"`
 
+### EthGetTransactionHashByCid
+
+
+Perms: read
+
+Inputs:
+```json
+[
+  {
+    "/": "bafy2bzacea3wsdh6y3a36tb3skempjoxqpuyompjbmfeyf34fi3uy6uue42v4"
+  }
+]
+```
+
+Response: `"0x37690cfec6c1bf4c3b9288c7a5d783e98731e90b0a4c177c2a374c7a9427355e"`
+
 ### EthGetTransactionReceipt
 
 

documentation/en/default-lotus-config.toml

@@ -343,3 +343,11 @@
   #ActorEventDatabasePath = ""
 
 
+[EthTxHashConfig]
+  # EnableEthHashToFilecoinCidMapping enables storing a mapping of eth transaction hashes to filecoin message Cids
+  #
+  # type: bool
+  # env var: LOTUS_ETHTXHASHCONFIG_ENABLEETHHASHTOFILECOINCIDMAPPING
+  #EnableEthHashToFilecoinCidMapping = true
+
+

extern/filecoin-ffi

@@ -1 +1 @@
-Subproject commit 86eac2161f442945bffee3fbfe7d094c20b48dd3
+Subproject commit c4adeb4532719acf7b1c182cb98a3cca7b955a14

itests/eth_deploy_test.go

@@ -41,6 +41,7 @@ func TestDeployment(t *testing.T) {
 			cfg.ActorEvent.EnableRealTimeFilterAPI = true
 			return nil
 		}),
+		kit.EthTxHashLookup(),
 	)
 	ens.InterconnectAll().BeginMining(blockTime)
 

itests/eth_filter_test.go

@@ -204,7 +204,7 @@ func TestEthNewFilterCatchAll(t *testing.T) {
 	kit.QuietMiningLogs()
 
 	blockTime := 100 * time.Millisecond
-	client, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(), kit.ThroughRPC(), kit.RealTimeFilterAPI())
+	client, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(), kit.ThroughRPC(), kit.RealTimeFilterAPI(), kit.EthTxHashLookup())
 	ens.InterconnectAll().BeginMining(blockTime)
 
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
@@ -289,9 +289,9 @@ func TestEthNewFilterCatchAll(t *testing.T) {
 
 	received := make(map[ethtypes.EthHash]msgInTipset)
 	for m := range msgChan {
-		eh, err := ethtypes.EthHashFromCid(m.msg.Cid)
+		eh, err := client.EthGetTransactionHashByCid(ctx, m.msg.Cid)
 		require.NoError(err)
-		received[eh] = m
+		received[*eh] = m
 	}
 	require.Equal(iterations, len(received), "all messages on chain")
 

itests/eth_hash_lookup_test.go

@@ -0,0 +1,340 @@
+package itests
+
+import (
+	"context"
+	"encoding/hex"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/filecoin-project/go-state-types/big"
+
+	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/chain/types/ethtypes"
+	"github.com/filecoin-project/lotus/itests/kit"
+	"github.com/filecoin-project/lotus/node/config"
+)
+
+// TestTransactionHashLookup tests to see if lotus correctly stores a mapping from ethereum transaction hash to
+// Filecoin Message Cid
+func TestTransactionHashLookup(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	blocktime := 1 * time.Second
+	client, _, ens := kit.EnsembleMinimal(
+		t,
+		kit.MockProofs(),
+		kit.ThroughRPC(),
+		kit.EthTxHashLookup(),
+	)
+	ens.InterconnectAll().BeginMining(blocktime)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	// install contract
+	contractHex, err := os.ReadFile("./contracts/SimpleCoin.bin")
+	require.NoError(t, err)
+
+	contract, err := hex.DecodeString(string(contractHex))
+	require.NoError(t, err)
+
+	// create a new Ethereum account
+	key, ethAddr, deployer := client.EVM().NewAccount()
+
+	// send some funds to the f410 address
+	kit.SendFunds(ctx, t, client, deployer, types.FromFil(10))
+
+	gaslimit, err := client.EthEstimateGas(ctx, ethtypes.EthCall{
+		From: &ethAddr,
+		Data: contract,
+	})
+	require.NoError(t, err)
+
+	maxPriorityFeePerGas, err := client.EthMaxPriorityFeePerGas(ctx)
+	require.NoError(t, err)
+
+	// now deploy a contract from the embryo, and validate it went well
+	tx := ethtypes.EthTxArgs{
+		ChainID:              build.Eip155ChainId,
+		Value:                big.Zero(),
+		Nonce:                0,
+		MaxFeePerGas:         types.NanoFil,
+		MaxPriorityFeePerGas: big.Int(maxPriorityFeePerGas),
+		GasLimit:             int(gaslimit),
+		Input:                contract,
+		V:                    big.Zero(),
+		R:                    big.Zero(),
+		S:                    big.Zero(),
+	}
+
+	client.EVM().SignTransaction(&tx, key.PrivateKey)
+
+	rawTxHash, err := tx.TxHash()
+	require.NoError(t, err)
+
+	hash := client.EVM().SubmitTransaction(ctx, &tx)
+	require.Equal(t, rawTxHash, hash)
+
+	mpoolTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, mpoolTx.Hash)
+
+	// Wait for message to land on chain
+	var receipt *api.EthTxReceipt
+	for i := 0; i < 20; i++ {
+		receipt, err = client.EthGetTransactionReceipt(ctx, hash)
+		if err != nil || receipt == nil {
+			time.Sleep(blocktime)
+			continue
+		}
+		break
+	}
+	require.NoError(t, err)
+	require.NotNil(t, receipt)
+
+	// Verify that the chain transaction now has new fields set.
+	chainTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, chainTx.Hash)
+
+	// require that the hashes are identical
+	require.Equal(t, hash, chainTx.Hash)
+	require.NotNil(t, chainTx.BlockNumber)
+	require.Greater(t, uint64(*chainTx.BlockNumber), uint64(0))
+	require.NotNil(t, chainTx.BlockHash)
+	require.NotEmpty(t, *chainTx.BlockHash)
+	require.NotNil(t, chainTx.TransactionIndex)
+	require.Equal(t, uint64(*chainTx.TransactionIndex), uint64(0)) // only transaction
+}
+
+// TestTransactionHashLookupNoDb tests to see if looking up eth transactions by hash breaks without the lookup table
+func TestTransactionHashLookupNoDb(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	blocktime := 1 * time.Second
+	client, _, ens := kit.EnsembleMinimal(
+		t,
+		kit.MockProofs(),
+		kit.ThroughRPC(),
+		kit.WithCfgOpt(func(cfg *config.FullNode) error {
+			cfg.EthTxHashConfig.EnableEthHashToFilecoinCidMapping = false
+			return nil
+		}),
+	)
+	ens.InterconnectAll().BeginMining(blocktime)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	// install contract
+	contractHex, err := os.ReadFile("./contracts/SimpleCoin.bin")
+	require.NoError(t, err)
+
+	contract, err := hex.DecodeString(string(contractHex))
+	require.NoError(t, err)
+
+	// create a new Ethereum account
+	key, ethAddr, deployer := client.EVM().NewAccount()
+
+	// send some funds to the f410 address
+	kit.SendFunds(ctx, t, client, deployer, types.FromFil(10))
+
+	gaslimit, err := client.EthEstimateGas(ctx, ethtypes.EthCall{
+		From: &ethAddr,
+		Data: contract,
+	})
+	require.NoError(t, err)
+
+	maxPriorityFeePerGas, err := client.EthMaxPriorityFeePerGas(ctx)
+	require.NoError(t, err)
+
+	// now deploy a contract from the embryo, and validate it went well
+	tx := ethtypes.EthTxArgs{
+		ChainID:              build.Eip155ChainId,
+		Value:                big.Zero(),
+		Nonce:                0,
+		MaxFeePerGas:         types.NanoFil,
+		MaxPriorityFeePerGas: big.Int(maxPriorityFeePerGas),
+		GasLimit:             int(gaslimit),
+		Input:                contract,
+		V:                    big.Zero(),
+		R:                    big.Zero(),
+		S:                    big.Zero(),
+	}
+
+	client.EVM().SignTransaction(&tx, key.PrivateKey)
+
+	rawTxHash, err := tx.TxHash()
+	require.NoError(t, err)
+
+	hash := client.EVM().SubmitTransaction(ctx, &tx)
+	require.Equal(t, rawTxHash, hash)
+
+	// We shouldn't be able to find the tx
+	mpoolTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Nil(t, mpoolTx)
+
+	// Wait for message to land on chain, we can't know exactly when because we can't find it.
+	time.Sleep(20 * blocktime)
+	receipt, err := client.EthGetTransactionReceipt(ctx, hash)
+	require.NoError(t, err)
+	require.Nil(t, receipt)
+
+	// We still shouldn't be able to find the tx
+	chainTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Nil(t, chainTx)
+}
+
+// TestTransactionHashLookupBlsFilecoinMessage tests to see if lotus can find a BLS Filecoin Message using the transaction hash
+func TestTransactionHashLookupBlsFilecoinMessage(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	blocktime := 1 * time.Second
+	client, _, ens := kit.EnsembleMinimal(
+		t,
+		kit.MockProofs(),
+		kit.ThroughRPC(),
+		kit.EthTxHashLookup(),
+	)
+	ens.InterconnectAll().BeginMining(blocktime)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	// get the existing balance from the default wallet to then split it.
+	bal, err := client.WalletBalance(ctx, client.DefaultKey.Address)
+	require.NoError(t, err)
+
+	// create a new address where to send funds.
+	addr, err := client.WalletNew(ctx, types.KTBLS)
+	require.NoError(t, err)
+
+	toSend := big.Div(bal, big.NewInt(2))
+	msg := &types.Message{
+		From:  client.DefaultKey.Address,
+		To:    addr,
+		Value: toSend,
+	}
+
+	sm, err := client.MpoolPushMessage(ctx, msg, nil)
+	require.NoError(t, err)
+
+	hash, err := ethtypes.EthHashFromCid(sm.Message.Cid())
+	require.NoError(t, err)
+
+	mpoolTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, mpoolTx.Hash)
+
+	// Wait for message to land on chain
+	var receipt *api.EthTxReceipt
+	for i := 0; i < 20; i++ {
+		receipt, err = client.EthGetTransactionReceipt(ctx, hash)
+		if err != nil || receipt == nil {
+			time.Sleep(blocktime)
+			continue
+		}
+		break
+	}
+	require.NoError(t, err)
+	require.NotNil(t, receipt)
+	require.Equal(t, hash, receipt.TransactionHash)
+
+	// Verify that the chain transaction now has new fields set.
+	chainTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, chainTx.Hash)
+
+	// require that the hashes are identical
+	require.Equal(t, hash, chainTx.Hash)
+	require.NotNil(t, chainTx.BlockNumber)
+	require.Greater(t, uint64(*chainTx.BlockNumber), uint64(0))
+	require.NotNil(t, chainTx.BlockHash)
+	require.NotEmpty(t, *chainTx.BlockHash)
+	require.NotNil(t, chainTx.TransactionIndex)
+	require.Equal(t, uint64(*chainTx.TransactionIndex), uint64(0)) // only transaction
+}
+
+// TestTransactionHashLookupSecpFilecoinMessage tests to see if lotus can find a Secp Filecoin Message using the transaction hash
+func TestTransactionHashLookupSecpFilecoinMessage(t *testing.T) {
+	kit.QuietMiningLogs()
+
+	blocktime := 1 * time.Second
+	client, _, ens := kit.EnsembleMinimal(
+		t,
+		kit.MockProofs(),
+		kit.ThroughRPC(),
+		kit.EthTxHashLookup(),
+	)
+	ens.InterconnectAll().BeginMining(blocktime)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	// get the existing balance from the default wallet to then split it.
+	bal, err := client.WalletBalance(ctx, client.DefaultKey.Address)
+	require.NoError(t, err)
+
+	// create a new address where to send funds.
+	addr, err := client.WalletNew(ctx, types.KTSecp256k1)
+	require.NoError(t, err)
+
+	toSend := big.Div(bal, big.NewInt(2))
+	setupMsg := &types.Message{
+		From:  client.DefaultKey.Address,
+		To:    addr,
+		Value: toSend,
+	}
+
+	setupSmsg, err := client.MpoolPushMessage(ctx, setupMsg, nil)
+	require.NoError(t, err)
+
+	_, err = client.StateWaitMsg(ctx, setupSmsg.Cid(), 3, api.LookbackNoLimit, true)
+	require.NoError(t, err)
+
+	// Send message for secp account
+	secpMsg := &types.Message{
+		From:  addr,
+		To:    client.DefaultKey.Address,
+		Value: big.Div(toSend, big.NewInt(2)),
+	}
+
+	secpSmsg, err := client.MpoolPushMessage(ctx, secpMsg, nil)
+	require.NoError(t, err)
+
+	hash, err := ethtypes.EthHashFromCid(secpSmsg.Cid())
+	require.NoError(t, err)
+
+	mpoolTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, mpoolTx.Hash)
+
+	_, err = client.StateWaitMsg(ctx, secpSmsg.Cid(), 3, api.LookbackNoLimit, true)
+	require.NoError(t, err)
+
+	receipt, err := client.EthGetTransactionReceipt(ctx, hash)
+	require.NoError(t, err)
+	require.NotNil(t, receipt)
+	require.Equal(t, hash, receipt.TransactionHash)
+
+	// Verify that the chain transaction now has new fields set.
+	chainTx, err := client.EthGetTransactionByHash(ctx, &hash)
+	require.NoError(t, err)
+	require.Equal(t, hash, chainTx.Hash)
+
+	// require that the hashes are identical
+	require.Equal(t, hash, chainTx.Hash)
+	require.NotNil(t, chainTx.BlockNumber)
+	require.Greater(t, uint64(*chainTx.BlockNumber), uint64(0))
+	require.NotNil(t, chainTx.BlockHash)
+	require.NotEmpty(t, *chainTx.BlockHash)
+	require.NotNil(t, chainTx.TransactionIndex)
+	require.Equal(t, uint64(*chainTx.TransactionIndex), uint64(0)) // only transaction
+}

itests/kit/node_opts.go

@@ -296,3 +296,10 @@ func HistoricFilterAPI(dbpath string) NodeOpt {
 		return nil
 	})
 }
+
+func EthTxHashLookup() NodeOpt {
+	return WithCfgOpt(func(cfg *config.FullNode) error {
+		cfg.EthTxHashConfig.EnableEthHashToFilecoinCidMapping = true
+		return nil
+	})
+}

node/builder_chain.go

@@ -161,7 +161,6 @@ var ChainNode = Options(
 		Override(new(messagepool.Provider), messagepool.NewProvider),
 		Override(new(messagepool.MpoolNonceAPI), From(new(*messagepool.MessagePool))),
 		Override(new(full.ChainModuleAPI), From(new(full.ChainModule))),
-		Override(new(full.EthModuleAPI), From(new(full.EthModule))),
 		Override(new(full.GasModuleAPI), From(new(full.GasModule))),
 		Override(new(full.MpoolModuleAPI), From(new(full.MpoolModule))),
 		Override(new(full.StateModuleAPI), From(new(full.StateModule))),
@@ -261,6 +260,8 @@ func ConfigFullNode(c interface{}) Option {
 		Override(new(events.EventAPI), From(new(modules.EventAPI))),
 		// in lite-mode Eth event api is provided by gateway
 		ApplyIf(isFullNode, Override(new(full.EthEventAPI), modules.EthEventAPI(cfg.ActorEvent))),
+
+		Override(new(full.EthModuleAPI), modules.EthModuleAPI(cfg.EthTxHashConfig)),
 	)
 }
 

node/config/def.go

@@ -107,6 +107,9 @@ func DefaultFullNode() *FullNode {
 			MaxFilterResults:        10000,
 			MaxFilterHeightRange:    2880, // conservative limit of one day
 		},
+		EthTxHashConfig: EthTxHashConfig{
+			EnableEthHashToFilecoinCidMapping: true,
+		},
 	}
 }
 

node/config/doc_gen.go

@@ -391,6 +391,14 @@ see https://lotus.filecoin.io/storage-providers/advanced-configurations/market/#
 			Comment: ``,
 		},
 	},
+	"EthTxHashConfig": []DocField{
+		{
+			Name: "EnableEthHashToFilecoinCidMapping",
+			Type: "bool",
+
+			Comment: `EnableEthHashToFilecoinCidMapping enables storing a mapping of eth transaction hashes to filecoin message Cids`,
+		},
+	},
 	"FeeConfig": []DocField{
 		{
 			Name: "DefaultMaxFee",
@@ -434,6 +442,12 @@ see https://lotus.filecoin.io/storage-providers/advanced-configurations/market/#
 			Name: "ActorEvent",
 			Type: "ActorEventConfig",
 
+			Comment: ``,
+		},
+		{
+			Name: "EthTxHashConfig",
+			Type: "EthTxHashConfig",
+
 			Comment: ``,
 		},
 	},

node/config/types.go

@@ -28,6 +28,7 @@ type FullNode struct {
 	Chainstore      Chainstore
 	Cluster         UserRaftConfig
 	ActorEvent      ActorEventConfig
+	EthTxHashConfig EthTxHashConfig
 }
 
 // // Common
@@ -692,3 +693,8 @@ type ActorEventConfig struct {
 	// Set a timeout for subscription clients
 	// Set upper bound on index size
 }
+
+type EthTxHashConfig struct {
+	// EnableEthHashToFilecoinCidMapping enables storing a mapping of eth transaction hashes to filecoin message Cids
+	EnableEthHashToFilecoinCidMapping bool
+}

node/impl/full/eth.go

@@ -21,9 +21,11 @@ import (
 	builtintypes "github.com/filecoin-project/go-state-types/builtin"
 	"github.com/filecoin-project/go-state-types/builtin/v10/eam"
 	"github.com/filecoin-project/go-state-types/builtin/v10/evm"
+	"github.com/filecoin-project/go-state-types/crypto"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain"
 	"github.com/filecoin-project/lotus/chain/actors"
 	builtinactors "github.com/filecoin-project/lotus/chain/actors/builtin"
 	"github.com/filecoin-project/lotus/chain/events/filter"
@@ -43,6 +45,7 @@ type EthModuleAPI interface {
 	EthGetBlockByHash(ctx context.Context, blkHash ethtypes.EthHash, fullTxInfo bool) (ethtypes.EthBlock, error)
 	EthGetBlockByNumber(ctx context.Context, blkNum string, fullTxInfo bool) (ethtypes.EthBlock, error)
 	EthGetTransactionByHash(ctx context.Context, txHash *ethtypes.EthHash) (*ethtypes.EthTx, error)
+	EthGetTransactionHashByCid(ctx context.Context, cid cid.Cid) (*ethtypes.EthHash, error)
 	EthGetTransactionCount(ctx context.Context, sender ethtypes.EthAddress, blkOpt string) (ethtypes.EthUint64, error)
 	EthGetTransactionReceipt(ctx context.Context, txHash ethtypes.EthHash) (*api.EthTxReceipt, error)
 	EthGetTransactionByBlockHashAndIndex(ctx context.Context, blkHash ethtypes.EthHash, txIndex ethtypes.EthUint64) (ethtypes.EthTx, error)
@@ -107,11 +110,10 @@ var (
 // accepts as the best parent tipset, based on the blocks it is accumulating
 // within the HEAD tipset.
 type EthModule struct {
-	fx.In
-
 	Chain            *store.ChainStore
 	Mpool            *messagepool.MessagePool
 	StateManager     *stmgr.StateManager
+	EthTxHashManager *EthTxHashManager
 
 	ChainAPI
 	MpoolAPI
@@ -254,10 +256,21 @@ func (a *EthModule) EthGetTransactionByHash(ctx context.Context, txHash *ethtype
 		return nil, nil
 	}
 
-	cid := txHash.ToCid()
+	c := cid.Undef
+	if a.EthTxHashManager != nil {
+		var err error
+		c, err = a.EthTxHashManager.TransactionHashLookup.LookupCidFromTxHash(*txHash)
+		if err != nil {
+			log.Debug("could not find transaction hash %s in lookup table", txHash.String())
+		}
+	}
+	// This isn't an eth transaction we have the mapping for, so let's look it up as a filecoin message
+	if c == cid.Undef {
+		c = txHash.ToCid()
+	}
 
 	// first, try to get the cid from mined transactions
-	msgLookup, err := a.StateAPI.StateSearchMsg(ctx, types.EmptyTSK, cid, api.LookbackNoLimit, true)
+	msgLookup, err := a.StateAPI.StateSearchMsg(ctx, types.EmptyTSK, c, api.LookbackNoLimit, true)
 	if err == nil {
 		tx, err := newEthTxFromFilecoinMessageLookup(ctx, msgLookup, -1, a.Chain, a.StateAPI)
 		if err == nil {
@@ -274,8 +287,8 @@ func (a *EthModule) EthGetTransactionByHash(ctx context.Context, txHash *ethtype
 	}
 
 	for _, p := range pending {
-		if p.Cid() == cid {
-			tx, err := newEthTxFromFilecoinMessage(ctx, p, a.StateAPI)
+		if p.Cid() == c {
+			tx, err := NewEthTxFromFilecoinMessage(ctx, p, a.StateAPI)
 			if err != nil {
 				return nil, fmt.Errorf("could not convert Filecoin message into tx: %s", err)
 			}
@@ -286,6 +299,11 @@ func (a *EthModule) EthGetTransactionByHash(ctx context.Context, txHash *ethtype
 	return nil, nil
 }
 
+func (a *EthModule) EthGetTransactionHashByCid(ctx context.Context, cid cid.Cid) (*ethtypes.EthHash, error) {
+	hash, err := EthTxHashFromFilecoinMessageCid(ctx, cid, a.StateAPI)
+	return &hash, err
+}
+
 func (a *EthModule) EthGetTransactionCount(ctx context.Context, sender ethtypes.EthAddress, blkParam string) (ethtypes.EthUint64, error) {
 	addr, err := sender.ToFilecoinAddress()
 	if err != nil {
@@ -305,19 +323,30 @@ func (a *EthModule) EthGetTransactionCount(ctx context.Context, sender ethtypes.
 }
 
 func (a *EthModule) EthGetTransactionReceipt(ctx context.Context, txHash ethtypes.EthHash) (*api.EthTxReceipt, error) {
-	cid := txHash.ToCid()
-
-	msgLookup, err := a.StateAPI.StateSearchMsg(ctx, types.EmptyTSK, cid, api.LookbackNoLimit, true)
+	c := cid.Undef
+	if a.EthTxHashManager != nil {
+		var err error
+		c, err = a.EthTxHashManager.TransactionHashLookup.LookupCidFromTxHash(txHash)
 		if err != nil {
+			log.Debug("could not find transaction hash %s in lookup table", txHash.String())
+		}
+	}
+	// This isn't an eth transaction we have the mapping for, so let's look it up as a filecoin message
+	if c == cid.Undef {
+		c = txHash.ToCid()
+	}
+
+	msgLookup, err := a.StateAPI.StateSearchMsg(ctx, types.EmptyTSK, c, api.LookbackNoLimit, true)
+	if err != nil || msgLookup == nil {
 		return nil, nil
 	}
 
 	tx, err := newEthTxFromFilecoinMessageLookup(ctx, msgLookup, -1, a.Chain, a.StateAPI)
-	if err != nil {
+	if err != nil && tx.Hash == ethtypes.EmptyEthHash {
 		return nil, nil
 	}
 
-	replay, err := a.StateAPI.StateReplay(ctx, types.EmptyTSK, cid)
+	replay, err := a.StateAPI.StateReplay(ctx, types.EmptyTSK, c)
 	if err != nil {
 		return nil, nil
 	}
@@ -640,11 +669,12 @@ func (a *EthModule) EthSendRawTransaction(ctx context.Context, rawTx ethtypes.Et
 		smsg.Message.Method = builtinactors.MethodSend
 	}
 
-	cid, err := a.MpoolAPI.MpoolPush(ctx, smsg)
+	_, err = a.MpoolAPI.MpoolPush(ctx, smsg)
 	if err != nil {
 		return ethtypes.EmptyEthHash, err
 	}
-	return ethtypes.EthHashFromCid(cid)
+
+	return ethtypes.EthHashFromTxBytes(rawTx), nil
 }
 
 func (a *EthModule) ethCallToFilecoinMessage(ctx context.Context, tx ethtypes.EthCall) (*types.Message, error) {
@@ -791,7 +821,7 @@ func (e *EthEvent) EthGetLogs(ctx context.Context, filterSpec *ethtypes.EthFilte
 
 	_ = e.uninstallFilter(ctx, f)
 
-	return ethFilterResultFromEvents(ces)
+	return ethFilterResultFromEvents(ces, e.SubManager.StateAPI)
 }
 
 func (e *EthEvent) EthGetFilterChanges(ctx context.Context, id ethtypes.EthFilterID) (*ethtypes.EthFilterResult, error) {
@@ -806,11 +836,11 @@ func (e *EthEvent) EthGetFilterChanges(ctx context.Context, id ethtypes.EthFilte
 
 	switch fc := f.(type) {
 	case filterEventCollector:
-		return ethFilterResultFromEvents(fc.TakeCollectedEvents(ctx))
+		return ethFilterResultFromEvents(fc.TakeCollectedEvents(ctx), e.SubManager.StateAPI)
 	case filterTipSetCollector:
 		return ethFilterResultFromTipSets(fc.TakeCollectedTipSets(ctx))
 	case filterMessageCollector:
-		return ethFilterResultFromMessages(fc.TakeCollectedMessages(ctx))
+		return ethFilterResultFromMessages(fc.TakeCollectedMessages(ctx), e.SubManager.StateAPI)
 	}
 
 	return nil, xerrors.Errorf("unknown filter type")
@@ -828,7 +858,7 @@ func (e *EthEvent) EthGetFilterLogs(ctx context.Context, id ethtypes.EthFilterID
 
 	switch fc := f.(type) {
 	case filterEventCollector:
-		return ethFilterResultFromEvents(fc.TakeCollectedEvents(ctx))
+		return ethFilterResultFromEvents(fc.TakeCollectedEvents(ctx), e.SubManager.StateAPI)
 	}
 
 	return nil, xerrors.Errorf("wrong filter type")
@@ -1141,14 +1171,14 @@ type filterEventCollector interface {
 }
 
 type filterMessageCollector interface {
-	TakeCollectedMessages(context.Context) []cid.Cid
+	TakeCollectedMessages(context.Context) []*types.SignedMessage
 }
 
 type filterTipSetCollector interface {
 	TakeCollectedTipSets(context.Context) []types.TipSetKey
 }
 
-func ethFilterResultFromEvents(evs []*filter.CollectedEvent) (*ethtypes.EthFilterResult, error) {
+func ethFilterResultFromEvents(evs []*filter.CollectedEvent, sa StateAPI) (*ethtypes.EthFilterResult, error) {
 	res := &ethtypes.EthFilterResult{}
 	for _, ev := range evs {
 		log := ethtypes.EthLog{
@@ -1174,11 +1204,10 @@ func ethFilterResultFromEvents(evs []*filter.CollectedEvent) (*ethtypes.EthFilte
 			return nil, err
 		}
 
-		log.TransactionHash, err = ethtypes.EthHashFromCid(ev.MsgCid)
+		log.TransactionHash, err = EthTxHashFromFilecoinMessageCid(context.TODO(), ev.MsgCid, sa)
 		if err != nil {
 			return nil, err
 		}
-
 		c, err := ev.TipSetKey.Cid()
 		if err != nil {
 			return nil, err
@@ -1213,11 +1242,11 @@ func ethFilterResultFromTipSets(tsks []types.TipSetKey) (*ethtypes.EthFilterResu
 	return res, nil
 }
 
-func ethFilterResultFromMessages(cs []cid.Cid) (*ethtypes.EthFilterResult, error) {
+func ethFilterResultFromMessages(cs []*types.SignedMessage, sa StateAPI) (*ethtypes.EthFilterResult, error) {
 	res := &ethtypes.EthFilterResult{}
 
 	for _, c := range cs {
-		hash, err := ethtypes.EthHashFromCid(c)
+		hash, err := EthTxHashFromSignedFilecoinMessage(context.TODO(), c, sa)
 		if err != nil {
 			return nil, err
 		}
@@ -1316,7 +1345,7 @@ func (e *ethSubscription) start(ctx context.Context) {
 			var err error
 			switch vt := v.(type) {
 			case *filter.CollectedEvent:
-				resp.Result, err = ethFilterResultFromEvents([]*filter.CollectedEvent{vt})
+				resp.Result, err = ethFilterResultFromEvents([]*filter.CollectedEvent{vt}, e.StateAPI)
 			case *types.TipSet:
 				eb, err := newEthBlockFromFilecoinTipSet(ctx, vt, true, e.Chain, e.ChainAPI, e.StateAPI)
 				if err != nil {
@@ -1391,18 +1420,15 @@ func newEthBlockFromFilecoinTipSet(ctx context.Context, ts *types.TipSet, fullTx
 		}
 		gasUsed += msgLookup.Receipt.GasUsed
 
-		if fullTxInfo {
 		tx, err := newEthTxFromFilecoinMessageLookup(ctx, msgLookup, txIdx, cs, sa)
 		if err != nil {
 			return ethtypes.EthBlock{}, nil
 		}
+
+		if fullTxInfo {
 			block.Transactions = append(block.Transactions, tx)
 		} else {
-			hash, err := ethtypes.EthHashFromCid(msg.Cid())
-			if err != nil {
-				return ethtypes.EthBlock{}, err
-			}
-			block.Transactions = append(block.Transactions, hash.String())
+			block.Transactions = append(block.Transactions, tx.Hash.String())
 		}
 	}
 
@@ -1454,19 +1480,35 @@ func lookupEthAddress(ctx context.Context, addr address.Address, sa StateAPI) (e
 	return ethtypes.EthAddressFromFilecoinAddress(idAddr)
 }
 
-func newEthTxFromFilecoinMessage(ctx context.Context, smsg *types.SignedMessage, sa StateAPI) (ethtypes.EthTx, error) {
-	fromEthAddr, err := lookupEthAddress(ctx, smsg.Message.From, sa)
-	if err != nil {
-		return ethtypes.EthTx{}, err
+func EthTxHashFromFilecoinMessageCid(ctx context.Context, c cid.Cid, sa StateAPI) (ethtypes.EthHash, error) {
+	smsg, err := sa.Chain.GetSignedMessage(ctx, c)
+	if err == nil {
+		return EthTxHashFromSignedFilecoinMessage(ctx, smsg, sa)
 	}
 
-	toEthAddr, err := lookupEthAddress(ctx, smsg.Message.To, sa)
+	return ethtypes.EthHashFromCid(c)
+}
+
+func EthTxHashFromSignedFilecoinMessage(ctx context.Context, smsg *types.SignedMessage, sa StateAPI) (ethtypes.EthHash, error) {
+	if smsg.Signature.Type == crypto.SigTypeDelegated {
+		ethTx, err := NewEthTxFromFilecoinMessage(ctx, smsg, sa)
 		if err != nil {
-		return ethtypes.EthTx{}, err
+			return ethtypes.EmptyEthHash, err
 		}
+		return ethTx.Hash, nil
+	}
+
+	return ethtypes.EthHashFromCid(smsg.Cid())
+}
+
+func NewEthTxFromFilecoinMessage(ctx context.Context, smsg *types.SignedMessage, sa StateAPI) (ethtypes.EthTx, error) {
+	// Ignore errors here so we can still parse non-eth messages
+	fromEthAddr, _ := lookupEthAddress(ctx, smsg.Message.From, sa)
+	toEthAddr, _ := lookupEthAddress(ctx, smsg.Message.To, sa)
 
 	toAddr := &toEthAddr
 	input := smsg.Message.Params
+	var err error
 	// Check to see if we need to decode as contract deployment.
 	// We don't need to resolve the to address, because there's only one form (an ID).
 	if smsg.Message.To == builtintypes.EthereumAddressManagerActorAddr {
@@ -1505,26 +1547,38 @@ func newEthTxFromFilecoinMessage(ctx context.Context, smsg *types.SignedMessage,
 		r, s, v = ethtypes.EthBigIntZero, ethtypes.EthBigIntZero, ethtypes.EthBigIntZero
 	}
 
-	hash, err := ethtypes.EthHashFromCid(smsg.Cid())
-	if err != nil {
-		return ethtypes.EthTx{}, err
-	}
-
 	tx := ethtypes.EthTx{
-		Hash:                 hash,
 		Nonce:                ethtypes.EthUint64(smsg.Message.Nonce),
 		ChainID:              ethtypes.EthUint64(build.Eip155ChainId),
 		From:                 fromEthAddr,
 		To:                   toAddr,
 		Value:                ethtypes.EthBigInt(smsg.Message.Value),
 		Type:                 ethtypes.EthUint64(2),
+		Input:                input,
 		Gas:                  ethtypes.EthUint64(smsg.Message.GasLimit),
 		MaxFeePerGas:         ethtypes.EthBigInt(smsg.Message.GasFeeCap),
 		MaxPriorityFeePerGas: ethtypes.EthBigInt(smsg.Message.GasPremium),
 		V:                    v,
 		R:                    r,
 		S:                    s,
-		Input:                input,
+	}
+
+	// This is an eth tx
+	if smsg.Signature.Type == crypto.SigTypeDelegated {
+		tx.Hash, err = tx.TxHash()
+		if err != nil {
+			return tx, err
+		}
+	} else if smsg.Signature.Type == crypto.SigTypeUnknown { // BLS Filecoin message
+		tx.Hash, err = ethtypes.EthHashFromCid(smsg.Message.Cid())
+		if err != nil {
+			return tx, err
+		}
+	} else { // Secp Filecoin Message
+		tx.Hash, err = ethtypes.EthHashFromCid(smsg.Cid())
+		if err != nil {
+			return tx, err
+		}
 	}
 
 	return tx, nil
@@ -1537,11 +1591,6 @@ func newEthTxFromFilecoinMessageLookup(ctx context.Context, msgLookup *api.MsgLo
 	if msgLookup == nil {
 		return ethtypes.EthTx{}, fmt.Errorf("msg does not exist")
 	}
-	cid := msgLookup.Message
-	txHash, err := ethtypes.EthHashFromCid(cid)
-	if err != nil {
-		return ethtypes.EthTx{}, err
-	}
 
 	ts, err := cs.LoadTipSet(ctx, msgLookup.TipSet)
 	if err != nil {
@@ -1582,11 +1631,22 @@ func newEthTxFromFilecoinMessageLookup(ctx context.Context, msgLookup *api.MsgLo
 	}
 
 	smsg, err := cs.GetSignedMessage(ctx, msgLookup.Message)
+	if err != nil {
+		// We couldn't find the signed message, it might be a BLS message, so search for a regular message.
+		msg, err := cs.GetMessage(ctx, msgLookup.Message)
 		if err != nil {
 			return ethtypes.EthTx{}, err
 		}
+		smsg = &types.SignedMessage{
+			Message: *msg,
+			Signature: crypto.Signature{
+				Type: crypto.SigTypeUnknown,
+				Data: nil,
+			},
+		}
+	}
 
-	tx, err := newEthTxFromFilecoinMessage(ctx, smsg, sa)
+	tx, err := NewEthTxFromFilecoinMessage(ctx, smsg, sa)
 	if err != nil {
 		return ethtypes.EthTx{}, err
 	}
@@ -1597,7 +1657,6 @@ func newEthTxFromFilecoinMessageLookup(ctx context.Context, msgLookup *api.MsgLo
 	)
 
 	tx.ChainID = ethtypes.EthUint64(build.Eip155ChainId)
-	tx.Hash = txHash
 	tx.BlockHash = &blkHash
 	tx.BlockNumber = &bn
 	tx.TransactionIndex = &ti
@@ -1701,6 +1760,68 @@ func newEthTxReceipt(ctx context.Context, tx ethtypes.EthTx, lookup *api.MsgLook
 	return receipt, nil
 }
 
+func (m EthTxHashManager) Apply(ctx context.Context, from, to *types.TipSet) error {
+	for _, blk := range to.Blocks() {
+		_, smsgs, err := m.StateAPI.Chain.MessagesForBlock(ctx, blk)
+		if err != nil {
+			return err
+		}
+
+		for _, smsg := range smsgs {
+			if smsg.Signature.Type != crypto.SigTypeDelegated {
+				continue
+			}
+
+			hash, err := EthTxHashFromSignedFilecoinMessage(ctx, smsg, m.StateAPI)
+			if err != nil {
+				return err
+			}
+
+			err = m.TransactionHashLookup.InsertTxHash(hash, smsg.Cid(), int64(to.Height()))
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+type EthTxHashManager struct {
+	StateAPI              StateAPI
+	TransactionHashLookup *chain.TransactionHashLookup
+}
+
+func (m EthTxHashManager) Revert(ctx context.Context, from, to *types.TipSet) error {
+	return nil
+}
+
+func WaitForMpoolUpdates(ctx context.Context, ch <-chan api.MpoolUpdate, manager *EthTxHashManager) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case u := <-ch:
+			if u.Type != api.MpoolAdd {
+				continue
+			}
+			if u.Message.Signature.Type != crypto.SigTypeDelegated {
+				continue
+			}
+
+			ethTx, err := NewEthTxFromFilecoinMessage(ctx, u.Message, manager.StateAPI)
+			if err != nil {
+				log.Errorf("error converting filecoin message to eth tx: %s", err)
+			}
+
+			err = manager.TransactionHashLookup.InsertTxHash(ethTx.Hash, u.Message.Cid(), chain.MemPoolEpoch)
+			if err != nil {
+				log.Errorf("error inserting tx mapping to db: %s", err)
+			}
+		}
+	}
+}
+
 // decodeLogBytes decodes a CBOR-serialized array into its original form.
 //
 // This function swallows errors and returns the original array if it failed

node/modules/ethmodule.go

@@ -0,0 +1,84 @@
+package modules
+
+import (
+	"context"
+	"path/filepath"
+
+	"go.uber.org/fx"
+
+	"github.com/filecoin-project/lotus/chain"
+	"github.com/filecoin-project/lotus/chain/events"
+	"github.com/filecoin-project/lotus/chain/messagepool"
+	"github.com/filecoin-project/lotus/chain/stmgr"
+	"github.com/filecoin-project/lotus/chain/store"
+	"github.com/filecoin-project/lotus/node/config"
+	"github.com/filecoin-project/lotus/node/impl/full"
+	"github.com/filecoin-project/lotus/node/modules/helpers"
+	"github.com/filecoin-project/lotus/node/repo"
+)
+
+func EthModuleAPI(cfg config.EthTxHashConfig) func(helpers.MetricsCtx, repo.LockedRepo, fx.Lifecycle, *store.ChainStore, *stmgr.StateManager, EventAPI, *messagepool.MessagePool, full.StateAPI, full.ChainAPI, full.MpoolAPI) (*full.EthModule, error) {
+	return func(mctx helpers.MetricsCtx, r repo.LockedRepo, lc fx.Lifecycle, cs *store.ChainStore, sm *stmgr.StateManager, evapi EventAPI, mp *messagepool.MessagePool, stateapi full.StateAPI, chainapi full.ChainAPI, mpoolapi full.MpoolAPI) (*full.EthModule, error) {
+		em := &full.EthModule{
+			Chain:        cs,
+			Mpool:        mp,
+			StateManager: sm,
+			ChainAPI:     chainapi,
+			MpoolAPI:     mpoolapi,
+			StateAPI:     stateapi,
+		}
+
+		if !cfg.EnableEthHashToFilecoinCidMapping {
+			// mapping functionality disabled. Nothing to do here
+			return em, nil
+		}
+
+		dbPath, err := r.SqlitePath()
+		if err != nil {
+			return nil, err
+		}
+
+		transactionHashLookup, err := chain.NewTransactionHashLookup(filepath.Join(dbPath + "txHash.db"))
+		if err != nil {
+			return nil, err
+		}
+
+		lc.Append(fx.Hook{
+			OnStop: func(ctx context.Context) error {
+				return transactionHashLookup.Close()
+			},
+		})
+
+		ethTxHashManager := full.EthTxHashManager{
+			StateAPI:              stateapi,
+			TransactionHashLookup: transactionHashLookup,
+		}
+
+		em.EthTxHashManager = &ethTxHashManager
+
+		const ChainHeadConfidence = 1
+
+		ctx := helpers.LifecycleCtx(mctx, lc)
+		lc.Append(fx.Hook{
+			OnStart: func(context.Context) error {
+				ev, err := events.NewEventsWithConfidence(ctx, &evapi, ChainHeadConfidence)
+				if err != nil {
+					return err
+				}
+
+				// Tipset listener
+				_ = ev.Observe(&ethTxHashManager)
+
+				ch, err := mp.Updates(ctx)
+				if err != nil {
+					return err
+				}
+				go full.WaitForMpoolUpdates(ctx, ch, &ethTxHashManager)
+
+				return nil
+			},
+		})
+
+		return em, nil
+	}
+}

node/repo/fsrepo.go

@@ -37,6 +37,7 @@ const (
 	fsDatastore     = "datastore"
 	fsLock          = "repo.lock"
 	fsKeystore      = "keystore"
+	fsSqlite        = "sqlite"
 )
 
 func NewRepoTypeFromString(t string) RepoType {
@@ -411,6 +412,10 @@ type fsLockedRepo struct {
 	ssErr  error
 	ssOnce sync.Once
 
+	sqlPath string
+	sqlErr  error
+	sqlOnce sync.Once
+
 	storageLk sync.Mutex
 	configLk  sync.Mutex
 }
@@ -515,6 +520,21 @@ func (fsr *fsLockedRepo) SplitstorePath() (string, error) {
 	return fsr.ssPath, fsr.ssErr
 }
 
+func (fsr *fsLockedRepo) SqlitePath() (string, error) {
+	fsr.sqlOnce.Do(func() {
+		path := fsr.join(fsSqlite)
+
+		if err := os.MkdirAll(path, 0755); err != nil {
+			fsr.sqlErr = err
+			return
+		}
+
+		fsr.sqlPath = path
+	})
+
+	return fsr.sqlPath, fsr.sqlErr
+}
+
 // join joins path elements with fsr.path
 func (fsr *fsLockedRepo) join(paths ...string) string {
 	return filepath.Join(append([]string{fsr.path}, paths...)...)

node/repo/interface.go

@@ -69,6 +69,9 @@ type LockedRepo interface {
 	// SplitstorePath returns the path for the SplitStore
 	SplitstorePath() (string, error)
 
+	// SqlitePath returns the path for the Sqlite database
+	SqlitePath() (string, error)
+
 	// Returns config in this repo
 	Config() (interface{}, error)
 	SetConfig(func(interface{})) error

node/repo/memrepo.go

@@ -277,6 +277,14 @@ func (lmem *lockedMemRepo) SplitstorePath() (string, error) {
 	return splitstorePath, nil
 }
 
+func (lmem *lockedMemRepo) SqlitePath() (string, error) {
+	sqlitePath := filepath.Join(lmem.Path(), "sqlite")
+	if err := os.MkdirAll(sqlitePath, 0755); err != nil {
+		return "", err
+	}
+	return sqlitePath, nil
+}
+
 func (lmem *lockedMemRepo) ListDatastores(ns string) ([]int64, error) {
 	return nil, nil
 }