feat: add MevSimulateBundle iface

KyberNetwork · Mar 14, 2024 · 4d85830 · 4d85830
1 parent 5d62f89
commit 4d85830
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Showing 3 changed files with 55 additions and 0 deletions.
diff --git a/pkg/mev/blxr_bundle_sender.go b/pkg/mev/blxr_bundle_sender.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/flashbots/mev-share-node/mevshare"
 )
 
 type BlxrBuilder string
@@ -31,6 +32,10 @@ type BloxrouteClient struct {
 	enabledBuilders []BlxrBuilder
 }
 
+func (s *BloxrouteClient) MevSimulateBundle(_ uint64, _ common.Hash, _ *types.Transaction) (*mevshare.SimMevBundleResponse, error) {
+	return nil, fmt.Errorf("method not support")
+}
+
 // NewBloxrouteClient set flashbotKey to nil if you don't want to send to flashbot builders
 // With BuilderAll still need to add the flashbot key & the flashbot builder separately
 // https://docs.bloxroute.com/apis/mev-solution/bundle-submission

diff --git a/pkg/mev/bundle_sender.go b/pkg/mev/bundle_sender.go
@@ -106,18 +106,62 @@ func (s *Client) flashbotBackrunSendBundle(
 	}
 	inclusion := mevshare.MevBundleInclusion{
 		BlockNumber: hexutil.Uint64(blockNumber),
+		MaxBlock:    hexutil.Uint64(blockNumber + MaxBlockFromTarget),
 	}
 
 	// Make the bundle
 	req := mevshare.SendMevBundleArgs{
 		Body:      txs,
 		Inclusion: inclusion,
+		// share bundle data in increase chance of inclusion
+		// https://docs.flashbots.net/flashbots-mev-share/searchers/sending-bundles#share-bundle-data
+		Privacy: &mevshare.MevBundlePrivacy{
+			Hints: mevshare.HintTxHash,
+		},
 	}
 	// Send bundle
 	res, err := s.mevShareClient.SendBundle(req)
 	return res, err
 }
 
+func (s *Client) MevSimulateBundle(
+	blockNumber uint64,
+	pendingTxHash common.Hash,
+	tx *types.Transaction,
+) (*mevshare.SimMevBundleResponse, error) {
+	if s.mevShareClient == nil {
+		return nil, fmt.Errorf("mev share client is nil")
+	}
+
+	encodedTx := "0x" + txToRlp(tx)
+	txBytes := hexutil.Bytes(encodedTx)
+	// Define the bundle transactions
+	txs := []mevshare.MevBundleBody{
+		{
+			Hash: &pendingTxHash,
+		},
+		{
+			Tx: &txBytes,
+		},
+	}
+	inclusion := mevshare.MevBundleInclusion{
+		BlockNumber: hexutil.Uint64(blockNumber),
+		MaxBlock:    hexutil.Uint64(blockNumber + MaxBlockFromTarget),
+	}
+
+	// Make the bundle
+	req := mevshare.SendMevBundleArgs{
+		Body:      txs,
+		Inclusion: inclusion,
+		Privacy: &mevshare.MevBundlePrivacy{
+			Hints: mevshare.HintTxHash,
+		},
+	}
+	// Send bundle
+	res, err := s.mevShareClient.SimBundle(req, mevshare.SimMevBundleAuxArgs{})
+	return res, err
+}
+
 func (s *Client) ethBackrunSendBundle(
 	ctx context.Context,
 	uuid *string,

diff --git a/pkg/mev/pkg.go b/pkg/mev/pkg.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/flashbots/mev-share-node/mevshare"
 )
 
 type BundleSenderType int
@@ -33,6 +34,7 @@ const (
 	EthCallBundleMethod             = "eth_callBundle"
 	ETHCancelBundleMethod           = "eth_cancelBundle"
 	MevSendBundleMethod             = "mev_sendBundle"
+	MaxBlockFromTarget              = 3
 )
 
 type IBundleSender interface {
@@ -53,6 +55,10 @@ type IBundleSender interface {
 		ctx context.Context, bundleUUID string,
 	) error
 	SimulateBundle(ctx context.Context, blockNumber uint64, txs ...*types.Transaction) (SendBundleResponse, error)
+	MevSimulateBundle(
+		blockNumber uint64,
+		pendingTxHash common.Hash,
+		tx *types.Transaction) (*mevshare.SimMevBundleResponse, error)
 	GetSenderType() BundleSenderType
 }