diff --git a/ethstorage/miner/l1_mining_api.go b/ethstorage/miner/l1_mining_api.go
index 5bea0d10..fd6601e5 100644
--- a/ethstorage/miner/l1_mining_api.go
+++ b/ethstorage/miner/l1_mining_api.go
@@ -85,65 +85,22 @@ func (m *l1MiningAPI) GetDataHashes(ctx context.Context, contract common.Address
 
 func (m *l1MiningAPI) SubmitMinedResult(ctx context.Context, contract common.Address, rst result, cfg Config) (common.Hash, error) {
 	m.lg.Debug("Submit mined result", "shard", rst.startShardId, "block", rst.blockNumber, "nonce", rst.nonce)
-	headerRlp, err := m.getRandaoProof(ctx, rst.blockNumber)
+	calldata, err := m.composeCalldata(ctx, rst)
 	if err != nil {
-		m.lg.Error("Failed to get randao proof", "error", err)
+		m.lg.Error("Failed to compose calldata", "error", err)
 		return common.Hash{}, err
 	}
-	uint256Type, _ := abi.NewType("uint256", "", nil)
-	uint256Array, _ := abi.NewType("uint256[]", "", nil)
-	addrType, _ := abi.NewType("address", "", nil)
-	bytes32Array, _ := abi.NewType("bytes32[]", "", nil)
-	bytesArray, _ := abi.NewType("bytes[]", "", nil)
-	bytesType, _ := abi.NewType("bytes", "", nil)
-	dataField, _ := abi.Arguments{
-		{Type: uint256Type},
-		{Type: uint256Type},
-		{Type: addrType},
-		{Type: uint256Type},
-		{Type: bytes32Array},
-		{Type: uint256Array},
-		{Type: bytesType},
-		{Type: bytesArray},
-		{Type: bytesArray},
-	}.Pack(
-		rst.blockNumber,
-		new(big.Int).SetUint64(rst.startShardId),
-		rst.miner,
-		new(big.Int).SetUint64(rst.nonce),
-		rst.encodedData,
-		rst.masks,
-		headerRlp,
-		rst.inclusiveProofs,
-		rst.decodeProof,
-	)
-	calldata := append(mineSig[0:4], dataField...)
-	m.lg.Debug("Submit mined result", "calldata", common.Bytes2Hex(calldata))
-	gasPrice := cfg.GasPrice
-	if gasPrice == nil || gasPrice.Cmp(common.Big0) == 0 {
-		suggested, err := m.SuggestGasPrice(ctx)
-		if err != nil {
-			m.lg.Error("Query gas price failed", "error", err.Error())
-			return common.Hash{}, err
-		}
-		gasPrice = suggested
-		m.lg.Info("Query gas price done", "gasPrice", gasPrice)
-	}
-	tip := cfg.PriorityGasPrice
-	if tip == nil || tip.Cmp(common.Big0) == 0 {
-		suggested, err := m.SuggestGasTipCap(ctx)
-		if err != nil {
-			m.lg.Error("Query gas tip cap failed", "error", err.Error())
-			suggested = common.Big0
-		}
-		tip = suggested
-		m.lg.Info("Query gas tip cap done", "gasTipGap", tip)
+
+	tip, gasFeeCap, useConfig, err := m.suggestGasPrices(ctx, cfg)
+	if err != nil {
+		m.lg.Error("Failed to suggest gas prices", "error", err)
+		return common.Hash{}, err
 	}
 	estimatedGas, err := m.EstimateGas(ctx, ethereum.CallMsg{
 		From:      cfg.SignerAddr,
 		To:        &contract,
 		GasTipCap: tip,
-		GasFeeCap: gasPrice,
+		GasFeeCap: gasFeeCap,
 		Value:     common.Big0,
 		Data:      calldata,
 	})
@@ -152,21 +109,23 @@ func (m *l1MiningAPI) SubmitMinedResult(ctx context.Context, contract common.Add
 		return common.Hash{}, fmt.Errorf("failed to estimate gas: %w", err)
 	}
 	m.lg.Info("Estimated gas done", "gas", estimatedGas)
-	cost := new(big.Int).Mul(new(big.Int).SetUint64(estimatedGas), gasPrice)
+
 	reward, err := m.GetMiningReward(rst.startShardId, rst.blockNumber.Int64())
 	if err != nil {
 		m.lg.Error("Query mining reward failed", "error", err.Error())
 		return common.Hash{}, err
 	}
-	profit := new(big.Int).Sub(reward, cost)
-	m.lg.Info("Estimated reward and cost (in ether)", "reward", weiToEther(reward), "cost", weiToEther(cost), "profit", weiToEther(profit))
-	if profit.Cmp(cfg.MinimumProfit) == -1 {
-		m.lg.Warn("Will drop the tx: the profit will not meet expectation",
-			"profitEstimated", weiToEther(profit),
-			"minimumProfit", weiToEther(cfg.MinimumProfit),
-		)
+	profitableGasFeeCap := new(big.Int).Div(new(big.Int).Sub(reward, cfg.MinimumProfit), new(big.Int).SetUint64(estimatedGas))
+	m.lg.Info("Minimum profitable gas fee cap", "gasFeeCap", profitableGasFeeCap)
+	if gasFeeCap.Cmp(profitableGasFeeCap) == 1 {
+		profit := new(big.Int).Sub(reward, new(big.Int).Mul(new(big.Int).SetUint64(estimatedGas), gasFeeCap))
+		m.lg.Warn("Mining tx dropped: the profit will not meet expectation", "estimatedProfit", fmtEth(profit), "minimumProfit", fmtEth(cfg.MinimumProfit))
 		return common.Hash{}, errDropped
 	}
+	if !useConfig {
+		gasFeeCap = profitableGasFeeCap
+		m.lg.Info("Using profitable gas fee cap", "gasFeeCap", gasFeeCap)
+	}
 	sign := cfg.SignerFnFactory(m.NetworkID)
 	nonce, err := m.NonceAt(ctx, cfg.SignerAddr, big.NewInt(rpc.LatestBlockNumber.Int64()))
 	if err != nil {
@@ -179,7 +138,7 @@ func (m *l1MiningAPI) SubmitMinedResult(ctx context.Context, contract common.Add
 		ChainID:   m.NetworkID,
 		Nonce:     nonce,
 		GasTipCap: tip,
-		GasFeeCap: gasPrice,
+		GasFeeCap: gasFeeCap,
 		Gas:       gas,
 		To:        &contract,
 		Value:     common.Big0,
@@ -192,7 +151,7 @@ func (m *l1MiningAPI) SubmitMinedResult(ctx context.Context, contract common.Add
 	}
 	err = m.SendTransaction(ctx, signedTx)
 	if err != nil {
-		m.lg.Error("Send tx failed", "txNonce", nonce, "gasPrice", gasPrice, "error", err)
+		m.lg.Error("Send tx failed", "txNonce", nonce, "gasFeeCap", gasFeeCap, "error", err)
 		return common.Hash{}, err
 	}
 	m.lg.Info("Submit mined result done", "shard", rst.startShardId, "block", rst.blockNumber,
@@ -221,3 +180,67 @@ func (m *l1MiningAPI) getRandaoProof(ctx context.Context, blockNumber *big.Int)
 	}
 	return headerRlp, nil
 }
+
+func (m *l1MiningAPI) composeCalldata(ctx context.Context, rst result) ([]byte, error) {
+	headerRlp, err := m.getRandaoProof(ctx, rst.blockNumber)
+	if err != nil {
+		m.lg.Error("Failed to get randao proof", "error", err)
+		return nil, err
+	}
+	uint256Type, _ := abi.NewType("uint256", "", nil)
+	uint256Array, _ := abi.NewType("uint256[]", "", nil)
+	addrType, _ := abi.NewType("address", "", nil)
+	bytes32Array, _ := abi.NewType("bytes32[]", "", nil)
+	bytesArray, _ := abi.NewType("bytes[]", "", nil)
+	bytesType, _ := abi.NewType("bytes", "", nil)
+	dataField, _ := abi.Arguments{
+		{Type: uint256Type},
+		{Type: uint256Type},
+		{Type: addrType},
+		{Type: uint256Type},
+		{Type: bytes32Array},
+		{Type: uint256Array},
+		{Type: bytesType},
+		{Type: bytesArray},
+		{Type: bytesArray},
+	}.Pack(
+		rst.blockNumber,
+		new(big.Int).SetUint64(rst.startShardId),
+		rst.miner,
+		new(big.Int).SetUint64(rst.nonce),
+		rst.encodedData,
+		rst.masks,
+		headerRlp,
+		rst.inclusiveProofs,
+		rst.decodeProof,
+	)
+	calldata := append(mineSig[0:4], dataField...)
+	return calldata, nil
+}
+
+func (m *l1MiningAPI) suggestGasPrices(ctx context.Context, cfg Config) (*big.Int, *big.Int, bool, error) {
+	gasFeeCap := cfg.GasPrice
+	tip := cfg.PriorityGasPrice
+	useConfig := true
+	if gasFeeCap == nil || gasFeeCap.Cmp(common.Big0) == 0 {
+		useConfig = false
+		blockHeader, err := m.HeaderByNumber(ctx, nil)
+		if err != nil {
+			m.lg.Error("Failed to get block header", "error", err)
+			return nil, nil, false, err
+		}
+		m.lg.Info("Query baseFee done", "baseFee", blockHeader.BaseFee)
+		if tip == nil || tip.Cmp(common.Big0) == 0 {
+			suggested, err := m.SuggestGasTipCap(ctx)
+			if err != nil {
+				m.lg.Error("Query gas tip cap failed", "error", err.Error())
+				suggested = common.Big0
+			}
+			tip = suggested
+			m.lg.Info("Query gas tip cap done", "gasTipGap", tip)
+		}
+		gasFeeCap = new(big.Int).Add(blockHeader.BaseFee, tip)
+		m.lg.Info("Suggested gas fee cap", "gasFeeCap", gasFeeCap)
+	}
+	return tip, gasFeeCap, useConfig, nil
+}
diff --git a/ethstorage/miner/worker.go b/ethstorage/miner/worker.go
index b2c239f7..55e55b6f 100644
--- a/ethstorage/miner/worker.go
+++ b/ethstorage/miner/worker.go
@@ -487,9 +487,9 @@ func (w *worker) checkTxStatus(txHash common.Hash, miner common.Address) {
 		}
 		if reward != nil {
 			log.Info("Mining transaction accounting (in ether)",
-				"reward", weiToEther(reward),
-				"cost", weiToEther(cost),
-				"profit", weiToEther(new(big.Int).Sub(reward, cost)),
+				"reward", fmtEth(reward),
+				"cost", fmtEth(cost),
+				"profit", fmtEth(new(big.Int).Sub(reward, cost)),
 			)
 		}
 	} else if receipt.Status == 0 {
@@ -511,6 +511,11 @@ func weiToEther(wei *big.Int) *big.Float {
 	return f.Quo(fWei.SetInt(wei), big.NewFloat(params.Ether))
 }
 
+func fmtEth(wei *big.Int) string {
+	f := weiToEther(wei)
+	return fmt.Sprintf("%.9f", f)
+}
+
 // mineTask actually executes a mining task
 func (w *worker) mineTask(t *taskItem) (bool, error) {
 	startTime := time.Now()
diff --git a/integration_tests/node_mine_test.go b/integration_tests/node_mine_test.go
index 23c60a5c..cab2dd4e 100644
--- a/integration_tests/node_mine_test.go
+++ b/integration_tests/node_mine_test.go
@@ -432,7 +432,7 @@ func initMiningConfig(t *testing.T, client *eth.PollingClient) *miner.Config {
 	miningConfig.ZKProverMode = 2
 	miningConfig.ZKProverImpl = 2
 	miningConfig.ThreadsPerShard = 2
-	miningConfig.MinimumProfit = new(big.Int).SetInt64(-1e18)
+	miningConfig.MinimumProfit = new(big.Int).SetInt64(-500000000000)
 	return miningConfig
 }