feat: modify rpc methods to include synthetic txs

changelog.md

@@ -15,6 +15,7 @@
 * [2152](https://github.com/zeta-chain/node/pull/2152) - custom priority nonce mempool
 * [2113](https://github.com/zeta-chain/node/pull/2113) - add zetaclientd-supervisor process
 * [2154](https://github.com/zeta-chain/node/pull/2154) - add `ibccrosschain` module
+* [2282](https://github.com/zeta-chain/node/pull/2282) - modify rpc methods to support synthetic txs
 * [2258](https://github.com/zeta-chain/node/pull/2258) - add Optimism and Base in static chain information
 * [2287](https://github.com/zeta-chain/node/pull/2287) - implement `MsgUpdateChainInfo` message
 * [2279](https://github.com/zeta-chain/node/pull/2279) - add a CCTXGateway field to chain static data

go.mod

@@ -59,11 +59,13 @@ require (
 	cosmossdk.io/tools/rosetta v0.2.1
 	github.com/binance-chain/tss-lib v0.0.0-20201118045712-70b2cb4bf916
 	github.com/btcsuite/btcd/btcutil v1.1.3
+	github.com/cockroachdb/errors v1.10.0
 	github.com/cometbft/cometbft v0.37.4
 	github.com/cometbft/cometbft-db v0.8.0
+	github.com/golang/mock v1.6.0
+	github.com/huandu/skiplist v1.2.0
 	github.com/nanmu42/etherscan-api v1.10.0
 	github.com/onrik/ethrpc v1.2.0
-	github.com/tendermint/tendermint v0.34.12
 	go.nhat.io/grpcmock v0.25.0
 )
 
@@ -77,7 +79,6 @@ require (
 	github.com/agl/ed25519 v0.0.0-20200225211852-fd4d107ace12 // indirect
 	github.com/bool64/shared v0.1.5 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
-	github.com/cockroachdb/errors v1.10.0 // indirect
 	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
 	github.com/cockroachdb/pebble v0.0.0-20220817183557-09c6e030a677 // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
@@ -95,10 +96,8 @@ require (
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/googleapis v1.4.1 // indirect
 	github.com/golang/glog v1.1.2 // indirect
-	github.com/golang/mock v1.6.0 // indirect
 	github.com/google/pprof v0.0.0-20230602150820-91b7bce49751 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect
-	github.com/huandu/skiplist v1.2.0 // indirect
 	github.com/iancoleman/orderedmap v0.3.0 // indirect
 	github.com/ipfs/boxo v0.10.0 // indirect
 	github.com/jmhodges/levigo v1.0.0 // indirect
@@ -216,7 +215,7 @@ require (
 	github.com/gtank/ristretto255 v0.1.2 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-getter v1.7.4 // indirect
+	github.com/hashicorp/go-getter v1.7.4
 	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
 	github.com/hashicorp/go-safetemp v1.0.0 // indirect
 	github.com/hashicorp/go-version v1.6.0 // indirect
@@ -321,7 +320,7 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.24.0 // indirect
 	golang.org/x/crypto v0.17.0
-	golang.org/x/exp v0.0.0-20230711153332-06a737ee72cb // indirect
+	golang.org/x/exp v0.0.0-20230711153332-06a737ee72cb
 	golang.org/x/mod v0.11.0 // indirect
 	golang.org/x/net v0.19.0
 	golang.org/x/oauth2 v0.15.0 // indirect
@@ -354,4 +353,4 @@ replace (
 
 replace github.com/cometbft/cometbft-db => github.com/notional-labs/cometbft-db v0.0.0-20230321185329-6dc7c0ca6345
 
-replace github.com/evmos/ethermint => github.com/zeta-chain/ethermint v0.0.0-20240429123701-35f3f79bf83f
+replace github.com/evmos/ethermint => github.com/zeta-chain/ethermint v0.0.0-20240531172701-61d040058c94

go.sum

@@ -1639,7 +1639,6 @@ github.com/tendermint/tendermint v0.34.0-rc6/go.mod h1:ugzyZO5foutZImv0Iyx/gOFCX
 github.com/tendermint/tendermint v0.34.0/go.mod h1:Aj3PIipBFSNO21r+Lq3TtzQ+uKESxkbA3yo/INM4QwQ=
 github.com/tendermint/tendermint v0.34.10/go.mod h1:aeHL7alPh4uTBIJQ8mgFEE8VwJLXI1VD3rVOmH2Mcy0=
 github.com/tendermint/tendermint v0.34.11/go.mod h1:aeHL7alPh4uTBIJQ8mgFEE8VwJLXI1VD3rVOmH2Mcy0=
-github.com/tendermint/tendermint v0.34.12 h1:m+kUYNhONedhJfHmHG8lqsdZvbR5t6vmhaok1yXjpKg=
 github.com/tendermint/tendermint v0.34.12/go.mod h1:aeHL7alPh4uTBIJQ8mgFEE8VwJLXI1VD3rVOmH2Mcy0=
 github.com/tendermint/tm-db v0.6.2/go.mod h1:GYtQ67SUvATOcoY8/+x6ylk8Qo02BQyLrAs+yAcLvGI=
 github.com/tendermint/tm-db v0.6.3/go.mod h1:lfA1dL9/Y/Y8wwyPp2NMLyn5P5Ptr/gvDFNWtrCWSf8=
@@ -1733,8 +1732,8 @@ github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/zeta-chain/ethermint v0.0.0-20240429123701-35f3f79bf83f h1:joafCsPgohPEn93VCbNXi9IAl6kNvKy8u+kv5amEvUk=
-github.com/zeta-chain/ethermint v0.0.0-20240429123701-35f3f79bf83f/go.mod h1:s1zA6OpXv3Tb5I0M6M6j5fo/AssaZL/pgkc7G0W2kN8=
+github.com/zeta-chain/ethermint v0.0.0-20240531172701-61d040058c94 h1:M54ljayJvy+WlEVdUmX8pgo1nA+XguB3mLhm3wi2z9o=
+github.com/zeta-chain/ethermint v0.0.0-20240531172701-61d040058c94/go.mod h1:s1zA6OpXv3Tb5I0M6M6j5fo/AssaZL/pgkc7G0W2kN8=
 github.com/zeta-chain/go-tss v0.1.1-0.20240430111318-1785e48eb127 h1:AGQepvsMIVHAHPlplzNcSCyMoGBY1DfO4WHG/QHUSIU=
 github.com/zeta-chain/go-tss v0.1.1-0.20240430111318-1785e48eb127/go.mod h1:bVpAoSlRYYCY/R34horVU3cheeHqhSVxygelc++emIU=
 github.com/zeta-chain/keystone/keys v0.0.0-20231105174229-903bc9405da2 h1:gd2uE0X+ZbdFJ8DubxNqLbOVlCB12EgWdzSNRAR82tM=

rpc/backend/blocks.go

@@ -22,8 +22,10 @@ import (
 	"math/big"
 	"strconv"
 
+	abci "github.com/cometbft/cometbft/abci/types"
 	tmrpcclient "github.com/cometbft/cometbft/rpc/client"
 	tmrpctypes "github.com/cometbft/cometbft/rpc/core/types"
+	tmtypes "github.com/cometbft/cometbft/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	grpctypes "github.com/cosmos/cosmos-sdk/types/grpc"
 	"github.com/ethereum/go-ethereum/common"
@@ -272,14 +274,14 @@ func (b *Backend) BlockNumberFromTendermintByHash(blockHash common.Hash) (*big.I
 	return big.NewInt(resBlock.Block.Height), nil
 }
 
-// EthMsgsFromTendermintBlock returns all real MsgEthereumTxs from a
+// EthMsgsFromTendermintBlock returns all real and synthetic MsgEthereumTxs from a
 // Tendermint block. It also ensures consistency over the correct txs indexes
 // across RPC endpoints
 func (b *Backend) EthMsgsFromTendermintBlock(
 	resBlock *tmrpctypes.ResultBlock,
 	blockRes *tmrpctypes.ResultBlockResults,
 ) ([]*evmtypes.MsgEthereumTx, []*rpctypes.TxResultAdditionalFields) {
-	var result []*evmtypes.MsgEthereumTx
+	var ethMsgs []*evmtypes.MsgEthereumTx
 	var txsAdditional []*rpctypes.TxResultAdditionalFields
 	block := resBlock.Block
 
@@ -294,30 +296,78 @@ func (b *Backend) EthMsgsFromTendermintBlock(
 		}
 
 		tx, err := b.clientCtx.TxConfig.TxDecoder()(tx)
-		if err != nil {
+		// assumption is that if regular ethermint msg is found in tx
+		// there should not be synthetic one as well
+		shouldCheckForSyntheticTx := true
+		// if tx can be decoded, try to find MsgEthereumTx inside
+		if err == nil {
+			for _, msg := range tx.GetMsgs() {
+				ethMsg, ok := msg.(*evmtypes.MsgEthereumTx)
+				if ok {
+					shouldCheckForSyntheticTx = false
+					ethMsg.Hash = ethMsg.AsTransaction().Hash().Hex()
+					ethMsgs = append(ethMsgs, ethMsg)
+					txsAdditional = append(txsAdditional, nil)
+				}
+			}
+		} else {
 			b.logger.Debug("failed to decode transaction in block", "height", block.Height, "error", err.Error())
-			continue
 		}
-		for _, msg := range tx.GetMsgs() {
-			ethMsg, ok := msg.(*evmtypes.MsgEthereumTx)
-			if !ok {
-				res, additional, err := rpctypes.ParseTxBlockResult(txResults[i], tx, i, block.Height)
-				if err != nil || additional == nil || res == nil {
-					continue
-				}
-				ethMsg = &evmtypes.MsgEthereumTx{
-					From: additional.Sender.Hex(),
-					Hash: additional.Hash.Hex(),
-				}
+
+		// if tx can not be decoded or MsgEthereumTx was not found, try to parse it from block results
+		if shouldCheckForSyntheticTx {
+			ethMsg, additional := b.parseSyntheticTxFromBlockResults(txResults, i, tx, block)
+			if ethMsg != nil {
+				ethMsgs = append(ethMsgs, ethMsg)
 				txsAdditional = append(txsAdditional, additional)
-			} else {
-				ethMsg.Hash = ethMsg.AsTransaction().Hash().Hex()
-				txsAdditional = append(txsAdditional, nil)
 			}
-			result = append(result, ethMsg)
 		}
 	}
-	return result, txsAdditional
+	return ethMsgs, txsAdditional
+}
+
+func (b *Backend) parseSyntheticTxFromBlockResults(
+	txResults []*abci.ResponseDeliverTx,
+	i int,
+	tx sdk.Tx,
+	block *tmtypes.Block,
+) (*evmtypes.MsgEthereumTx, *rpctypes.TxResultAdditionalFields) {
+	res, additional, err := rpctypes.ParseTxBlockResult(txResults[i], tx, i, block.Height)
+	// just skip tx if it can not be parsed, so remaining txs from the block are parsed
+	if err != nil {
+		b.logger.Error(err.Error())
+		return nil, nil
+	}
+	if additional == nil || res == nil {
+		return nil, nil
+	}
+	return b.parseSyntethicTxFromAdditionalFields(additional), additional
+}
+
+func (b *Backend) parseSyntethicTxFromAdditionalFields(
+	additional *rpctypes.TxResultAdditionalFields,
+) *evmtypes.MsgEthereumTx {
+	recipient := additional.Recipient
+	t := ethtypes.NewTx(&ethtypes.LegacyTx{
+		Nonce:    additional.Nonce,
+		Data:     additional.Data,
+		Gas:      additional.GasUsed,
+		To:       &recipient,
+		GasPrice: nil,
+		Value:    additional.Value,
+		V:        big.NewInt(0),
+		R:        big.NewInt(0),
+		S:        big.NewInt(0),
+	})
+	ethMsg := &evmtypes.MsgEthereumTx{}
+	err := ethMsg.FromEthereumTx(t)
+	if err != nil {
+		b.logger.Error("can not create eth msg", err.Error())
+		return nil
+	}
+	ethMsg.Hash = additional.Hash.Hex()
+	ethMsg.From = additional.Sender.Hex()
+	return ethMsg
 }
 
 // HeaderByNumber returns the block header identified by height.

rpc/backend/tracing.go

@@ -22,7 +22,6 @@ import (
 	tmrpctypes "github.com/cometbft/cometbft/rpc/core/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/hexutil"
 	evmtypes "github.com/evmos/ethermint/x/evm/types"
 	"github.com/pkg/errors"
 
@@ -50,62 +49,28 @@ func (b *Backend) TraceTransaction(hash common.Hash, config *evmtypes.TraceConfi
 		return nil, err
 	}
 
-	// check tx index is not out of bound
-	// #nosec G701 txs number in block is always less than MaxUint32
-	if uint32(len(blk.Block.Txs)) < transaction.TxIndex {
-		b.logger.Debug(
-			"tx index out of bounds",
-			"index",
-			transaction.TxIndex,
-			"hash",
-			hash.String(),
-			"height",
-			blk.Block.Height,
-		)
-		return nil, fmt.Errorf("transaction not included in block %v", blk.Block.Height)
-	}
-
-	var predecessors []*evmtypes.MsgEthereumTx
-	for _, txBz := range blk.Block.Txs[:transaction.TxIndex] {
-		tx, err := b.clientCtx.TxConfig.TxDecoder()(txBz)
-		if err != nil {
-			b.logger.Debug("failed to decode transaction in block", "height", blk.Block.Height, "error", err.Error())
-			continue
-		}
-		for _, msg := range tx.GetMsgs() {
-			ethMsg, ok := msg.(*evmtypes.MsgEthereumTx)
-			if !ok {
-				continue
-			}
-
-			predecessors = append(predecessors, ethMsg)
-		}
-	}
-
-	tx, err := b.clientCtx.TxConfig.TxDecoder()(blk.Block.Txs[transaction.TxIndex])
+	blockResult, err := b.TendermintBlockResultByNumber(&blk.Block.Height)
 	if err != nil {
-		b.logger.Debug("tx not found", "hash", hash)
-		return nil, err
+		return nil, fmt.Errorf("block result not found for height %d", blk.Block.Height)
 	}
 
-	// add predecessor messages in current cosmos tx
-	// #nosec G701 always in range
-	for i := 0; i < int(transaction.MsgIndex); i++ {
-		ethMsg, ok := tx.GetMsgs()[i].(*evmtypes.MsgEthereumTx)
-		if !ok {
-			continue
+	predecessors := []*evmtypes.MsgEthereumTx{}
+	msgs, _ := b.EthMsgsFromTendermintBlock(blk, blockResult)
+	var ethMsg *evmtypes.MsgEthereumTx
+	for _, m := range msgs {
+		if m.Hash == hash.Hex() {
+			ethMsg = m
+			break
 		}
-		predecessors = append(predecessors, ethMsg)
+		predecessors = append(predecessors, m)
 	}
 
-	ethMessage, ok := tx.GetMsgs()[transaction.MsgIndex].(*evmtypes.MsgEthereumTx)
-	if !ok {
-		b.logger.Debug("invalid transaction type", "type", fmt.Sprintf("%T", tx))
-		return nil, fmt.Errorf("invalid transaction type %T", tx)
+	if ethMsg == nil {
+		return nil, fmt.Errorf("tx not found in block %d", blk.Block.Height)
 	}
 
 	traceTxRequest := evmtypes.QueryTraceTxRequest{
-		Msg:             ethMessage,
+		Msg:             ethMsg,
 		Predecessors:    predecessors,
 		BlockNumber:     blk.Block.Height,
 		BlockTime:       blk.Block.Time,
@@ -160,31 +125,7 @@ func (b *Backend) TraceBlock(height rpctypes.BlockNumber,
 		b.logger.Debug("block result not found", "height", block.Block.Height, "error", err.Error())
 		return nil, nil
 	}
-
-	txDecoder := b.clientCtx.TxConfig.TxDecoder()
-
-	var txsMessages []*evmtypes.MsgEthereumTx
-	for i, tx := range txs {
-		if !rpctypes.TxSuccessOrExceedsBlockGasLimit(blockRes.TxsResults[i]) {
-			b.logger.Debug("invalid tx result code", "cosmos-hash", hexutil.Encode(tx.Hash()))
-			continue
-		}
-
-		decodedTx, err := txDecoder(tx)
-		if err != nil {
-			b.logger.Error("failed to decode transaction", "hash", txs[i].Hash(), "error", err.Error())
-			continue
-		}
-
-		for _, msg := range decodedTx.GetMsgs() {
-			ethMessage, ok := msg.(*evmtypes.MsgEthereumTx)
-			if !ok {
-				// Just considers Ethereum transactions
-				continue
-			}
-			txsMessages = append(txsMessages, ethMessage)
-		}
-	}
+	msgs, _ := b.EthMsgsFromTendermintBlock(block, blockRes)
 
 	// minus one to get the context at the beginning of the block
 	contextHeight := height - 1
@@ -195,7 +136,7 @@ func (b *Backend) TraceBlock(height rpctypes.BlockNumber,
 	ctxWithHeight := rpctypes.ContextWithHeight(int64(contextHeight))
 
 	traceBlockRequest := &evmtypes.QueryTraceBlockRequest{
-		Txs:             txsMessages,
+		Txs:             msgs,
 		TraceConfig:     config,
 		BlockNumber:     block.Block.Height,
 		BlockTime:       block.Block.Time,