diff --git a/internal/fsm/fsmtron/fsm_test.go b/internal/fsm/fsmtron/fsm_test.go
index aedcdf5..7723e11 100644
--- a/internal/fsm/fsmtron/fsm_test.go
+++ b/internal/fsm/fsmtron/fsm_test.go
@@ -86,7 +86,7 @@ func TestFSM(t *testing.T) {
 	bc, err := blockchains.New(context.Background(), conf.Blockchain, sdk)
 	require.NoError(t, err)
 
-	sysSvc := system.New(st, "sysVersion", "sysCommit")
+	sysSvc := system.New(l, st, "sysVersion", "sysCommit")
 	bs, err := baseservices.New(appCtx, l, conf, st, explorerProxySvc, bc, sysSvc, dispatcher.New(), nil, sdk)
 	require.NoError(t, err)
 
diff --git a/pkg/walletsdk/evm/estimate.go b/pkg/walletsdk/evm/estimate.go
index ebad7f0..1d54d1c 100644
--- a/pkg/walletsdk/evm/estimate.go
+++ b/pkg/walletsdk/evm/estimate.go
@@ -32,7 +32,7 @@ func (s *EVM) EstimateTransfer(ctx context.Context, fromAddress, toAddress, asse
 		return nil, fmt.Errorf("failed to estimate fee: %w", err)
 	}
 
-	if assetIdentifier == s.config.Blockchain.GetAssetIdentifier() { //nolint:nestif
+	if assetIdentifier == s.config.Blockchain.GetAssetIdentifier() {
 		estimatedGas, err := s.node.EstimateGas(ctx, ethereum.CallMsg{
 			From:  common.HexToAddress(fromAddress),
 			To:    utils.Pointer(common.HexToAddress(toAddress)),
@@ -44,12 +44,7 @@ func (s *EVM) EstimateTransfer(ctx context.Context, fromAddress, toAddress, asse
 
 		gasAmount = decimal.NewFromUint64(estimatedGas)
 		gasTipCap = estimate.SuggestGasTipCap
-
-		if gasTipCap.GreaterThan(estimate.MaxFeePerGas) {
-			gasTipCap = estimate.MaxFeePerGas
-		}
-
-		totalGasPrice = estimate.MaxFeePerGas.Add(gasTipCap)
+		totalGasPrice = estimate.MaxFeePerGas
 		totalFeeAmount = totalGasPrice.Mul(gasAmount)
 	} else {
 		amount = amount.Mul(decimal.NewFromInt(1).Mul(decimal.NewFromInt(10).Pow(decimal.NewFromInt(decimals))))
@@ -70,12 +65,7 @@ func (s *EVM) EstimateTransfer(ctx context.Context, fromAddress, toAddress, asse
 
 		gasAmount = decimal.NewFromUint64(estimatedGas)
 		gasTipCap = estimate.SuggestGasTipCap
-
-		if gasTipCap.GreaterThan(estimate.MaxFeePerGas) {
-			gasTipCap = estimate.MaxFeePerGas
-		}
-
-		totalGasPrice = estimate.MaxFeePerGas.Add(gasTipCap)
+		totalGasPrice = estimate.MaxFeePerGas
 		totalFeeAmount = totalGasPrice.Mul(gasAmount)
 	}
 
@@ -137,19 +127,36 @@ func (s *EVM) EstimateFee(ctx context.Context) (*EstimateFeeResult, error) {
 		SuggestGasPrice:  suggestGasPrice,
 	}
 
-	if s.config.Blockchain == wconstants.BlockchainTypeEthereum {
-		fee.SuggestGasTipCap = UnitMap[EtherUnitGWei]
+	// Apply blockchain-specific minimum gas tip caps
+	minGasTipCap := getMinGasTipCapByBlockchain(s.config.Blockchain)
+	if fee.SuggestGasTipCap.LessThan(minGasTipCap) {
+		fee.SuggestGasTipCap = minGasTipCap
 	}
 
-	if fee.SuggestGasTipCap.LessThan(UnitMap[EtherUnitGWei]) {
-		fee.SuggestGasTipCap = UnitMap[EtherUnitGWei]
-	}
-
-	fee.MaxFeePerGas = GetBaseFeeMultiplier(fee.SuggestGasPrice)
+	fee.MaxFeePerGas = GetBaseFeeMultiplier(fee.SuggestGasPrice).Add(fee.SuggestGasTipCap)
 
 	return fee, nil
 }
 
+// getMinGasTipCapByBlockchain returns the minimum gas tip cap for a given blockchain in Wei.
+func getMinGasTipCapByBlockchain(blockchain wconstants.BlockchainType) decimal.Decimal {
+	switch blockchain {
+	case wconstants.BlockchainTypeBinanceSmartChain:
+		return UnitMap[EtherUnitGWei].Div(decimal.NewFromInt(10))
+	case wconstants.BlockchainTypeEthereum:
+		return UnitMap[EtherUnitGWei]
+	case wconstants.BlockchainTypePolygon:
+		return decimal.NewFromInt(30).Mul(UnitMap[EtherUnitGWei])
+	case wconstants.BlockchainTypeArbitrum,
+		wconstants.BlockchainTypeOptimism,
+		wconstants.BlockchainTypeLinea:
+		return UnitMap[EtherUnitGWei].Div(decimal.NewFromInt(100))
+	default:
+		// Default: 1 Gwei
+		return UnitMap[EtherUnitGWei]
+	}
+}
+
 func GetBaseFeeMultiplier(baseFeeWei decimal.Decimal) decimal.Decimal {
 	items := []struct {
 		threshold  int64
diff --git a/pkg/walletsdk/tron/resources.go b/pkg/walletsdk/tron/resources.go
index 3c6563b..8c7b36b 100644
--- a/pkg/walletsdk/tron/resources.go
+++ b/pkg/walletsdk/tron/resources.go
@@ -278,7 +278,7 @@ func (t *Tron) AvailableForDelegateResources(ctx context.Context, addr string) (
 	resources := &Resources{
 		Energy:         t.AvailableEnergy(accountResources),
 		TotalEnergy:    t.TotalEnergyLimit(accountResources),
-		Bandwidth:      t.AvailableBandwidth(accountResources),
+		Bandwidth:      t.AvailableBandwidthWithoutFree(accountResources),
 		TotalBandwidth: t.TotalBandwidthLimit(accountResources),
 	}
 	if stackedEnergy.LessThan(resources.Energy) {