From eca3d0d62e13cf4bc9cbc7ecb7072cb11ec13d0a Mon Sep 17 00:00:00 2001
From: Stephan D <sdeshevikh@yandex.ru>
Date: Fri, 26 Dec 2025 00:53:25 +0100
Subject: [PATCH] replaced evm function for tron

---
 .../gateway/driver/evm/estimate_gas_test.go   | 31 +++++++++
 .../service/gateway/driver/evm/evm.go         | 66 +++++++++++++++++--
 2 files changed, 93 insertions(+), 4 deletions(-)
 create mode 100644 api/gateway/chain/internal/service/gateway/driver/evm/estimate_gas_test.go

diff --git a/api/gateway/chain/internal/service/gateway/driver/evm/estimate_gas_test.go b/api/gateway/chain/internal/service/gateway/driver/evm/estimate_gas_test.go
new file mode 100644
index 0000000..ebef980
--- /dev/null
+++ b/api/gateway/chain/internal/service/gateway/driver/evm/estimate_gas_test.go
@@ -0,0 +1,31 @@
+package evm
+
+import (
+	"math/big"
+	"strings"
+	"testing"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/stretchr/testify/require"
+)
+
+func TestTronEstimateCallUsesData(t *testing.T) {
+	from := common.HexToAddress("0xfa89b4d534bdeb2713d4ffd893e79d6535fb58f8")
+	to := common.HexToAddress("0xa614f803b6fd780986a42c78ec9c7f77e6ded13c")
+	callMsg := ethereum.CallMsg{
+		From:     from,
+		To:       &to,
+		GasPrice: big.NewInt(100),
+		Data:     []byte{0xa9, 0x05, 0x9c, 0xbb},
+	}
+
+	call := tronEstimateCall(callMsg)
+
+	require.Equal(t, strings.ToLower(from.Hex()), call["from"])
+	require.Equal(t, strings.ToLower(to.Hex()), call["to"])
+	require.Equal(t, "0x64", call["gasPrice"])
+	require.Equal(t, "0xa9059cbb", call["data"])
+	_, hasInput := call["input"]
+	require.False(t, hasInput)
+}
diff --git a/api/gateway/chain/internal/service/gateway/driver/evm/evm.go b/api/gateway/chain/internal/service/gateway/driver/evm/evm.go
index cfa913a..94016c2 100644
--- a/api/gateway/chain/internal/service/gateway/driver/evm/evm.go
+++ b/api/gateway/chain/internal/service/gateway/driver/evm/evm.go
@@ -10,6 +10,7 @@ import (
 	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/shopspring/decimal"
@@ -296,7 +297,7 @@ func EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network,
 			GasPrice: gasPrice,
 			Value:    amountBase,
 		}
-		gasLimit, err := client.EstimateGas(timeoutCtx, callMsg)
+		gasLimit, err := estimateGas(timeoutCtx, network, client, rpcClient, callMsg)
 		if err != nil {
 			logger.Warn("Failed to estimate gas", zap.Error(err), zap.Any("call_mesasge", callMsg))
 			return nil, merrors.Internal("failed to estimate gas: " + err.Error())
@@ -344,7 +345,7 @@ func EstimateFee(ctx context.Context, deps driver.Deps, network shared.Network,
 		GasPrice: gasPrice,
 		Data:     input,
 	}
-	gasLimit, err := client.EstimateGas(timeoutCtx, callMsg)
+	gasLimit, err := estimateGas(timeoutCtx, network, client, rpcClient, callMsg)
 	if err != nil {
 		logger.Warn("Failed to estimate gas", zap.Error(err), zap.Any("call_message", callMsg))
 		return nil, merrors.Internal("failed to estimate gas: " + err.Error())
@@ -457,7 +458,7 @@ func SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Networ
 			GasPrice: gasPrice,
 			Value:    amountInt,
 		}
-		gasLimit, err := client.EstimateGas(ctx, callMsg)
+		gasLimit, err := estimateGas(ctx, network, client, rpcClient, callMsg)
 		if err != nil {
 			logger.Warn("Failed to estimate gas", zap.Error(err),
 				zap.String("transfer_ref", transfer.TransferRef),
@@ -507,7 +508,7 @@ func SubmitTransfer(ctx context.Context, deps driver.Deps, network shared.Networ
 			GasPrice: gasPrice,
 			Data:     input,
 		}
-		gasLimit, err := client.EstimateGas(ctx, callMsg)
+		gasLimit, err := estimateGas(ctx, network, client, rpcClient, callMsg)
 		if err != nil {
 			logger.Warn("Failed to estimate gas", zap.Error(err),
 				zap.String("transfer_ref", transfer.TransferRef),
@@ -661,6 +662,63 @@ func erc20Decimals(ctx context.Context, client *rpc.Client, token common.Address
 	return val, nil
 }
 
+type gasEstimator interface {
+	EstimateGas(ctx context.Context, msg ethereum.CallMsg) (uint64, error)
+}
+
+func estimateGas(ctx context.Context, network shared.Network, client gasEstimator, rpcClient *rpc.Client, callMsg ethereum.CallMsg) (uint64, error) {
+	if isTronNetwork(network) {
+		if rpcClient == nil {
+			return 0, merrors.Internal("rpc client not initialised")
+		}
+		return estimateGasTron(ctx, rpcClient, callMsg)
+	}
+	return client.EstimateGas(ctx, callMsg)
+}
+
+func estimateGasTron(ctx context.Context, rpcClient *rpc.Client, callMsg ethereum.CallMsg) (uint64, error) {
+	call := tronEstimateCall(callMsg)
+	var hexResp string
+	if err := rpcClient.CallContext(ctx, &hexResp, "eth_estimateGas", call); err != nil {
+		return 0, err
+	}
+	val, err := shared.DecodeHexBig(hexResp)
+	if err != nil {
+		return 0, err
+	}
+	if val == nil {
+		return 0, merrors.Internal("failed to decode gas estimate")
+	}
+	return val.Uint64(), nil
+}
+
+func tronEstimateCall(callMsg ethereum.CallMsg) map[string]string {
+	call := make(map[string]string)
+	if callMsg.From != (common.Address{}) {
+		call["from"] = strings.ToLower(callMsg.From.Hex())
+	}
+	if callMsg.To != nil {
+		call["to"] = strings.ToLower(callMsg.To.Hex())
+	}
+	if callMsg.Gas > 0 {
+		call["gas"] = hexutil.EncodeUint64(callMsg.Gas)
+	}
+	if callMsg.GasPrice != nil {
+		call["gasPrice"] = hexutil.EncodeBig(callMsg.GasPrice)
+	}
+	if callMsg.Value != nil {
+		call["value"] = hexutil.EncodeBig(callMsg.Value)
+	}
+	if len(callMsg.Data) > 0 {
+		call["data"] = hexutil.Encode(callMsg.Data)
+	}
+	return call
+}
+
+func isTronNetwork(network shared.Network) bool {
+	return strings.HasPrefix(strings.ToLower(strings.TrimSpace(network.Name)), "tron")
+}
+
 func toBaseUnits(amount string, decimals uint8) (*big.Int, error) {
 	value, err := decimal.NewFromString(strings.TrimSpace(amount))
 	if err != nil {