From 2294a19e2361a90dd857fc14190b62c91b68da0a Mon Sep 17 00:00:00 2001
From: KamiD <44460798+KamiD@users.noreply.github.com>
Date: Tue, 16 Mar 2021 01:17:52 +0800
Subject: [PATCH] fix gas fee calcuation error (#798)

Co-authored-by: Daniel Choi <13338103+araskachoi@users.noreply.github.com>
---
 CHANGELOG.md    | 1 +
 app/ante/eth.go | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d8f1b9f..0c78b3a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,6 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (evm) [\#799](https://github.com/cosmos/ethermint/issues/799) Fix wrong precision in calculation of gas fee.
 * (evm) [\#760](https://github.com/cosmos/ethermint/issues/760) Fix Failed to call function EstimateGas.
 * (evm) [\#767](https://github.com/cosmos/ethermint/issues/767) Fix error of timeout when using Truffle to deploy contract.
 * (evm) [\#751](https://github.com/cosmos/ethermint/issues/751) Fix misused method to calculate block hash in evm related function.
diff --git a/app/ante/eth.go b/app/ante/eth.go
index 59005e4f..7e642481 100644
--- a/app/ante/eth.go
+++ b/app/ante/eth.go
@@ -99,7 +99,7 @@ func (emfd EthMempoolFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simula
 	evmDenom := emfd.evmKeeper.GetParams(ctx).EvmDenom
 
 	// fee = gas price * gas limit
-	fee := sdk.NewDecCoin(evmDenom, sdk.NewIntFromBigInt(msgEthTx.Fee()))
+	fee := sdk.NewDecCoinFromDec(evmDenom, sdk.NewDecFromBigIntWithPrec(msgEthTx.Fee(), sdk.Precision))
 
 	minGasPrices := ctx.MinGasPrices()
 	minFees := minGasPrices.AmountOf(evmDenom).MulInt64(int64(msgEthTx.Data.GasLimit))