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fix: use EffectiveGasPrice in ante handler for dynamic fee tx (#817)

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* Use effectiveGasPrice in ante handler for dynamic fee tx

Closes: #814

Solution:
- use effectiveGasPrice when check minimal-gas-prices, and deduct fee in ante handler
- implement an EthMempoolFeeDecorator

* add effectiveGasPrice to tx receipt

* changelog

* fix unit test

* fix comments

* add comments

* Apply suggestions from code review

Co-authored-by: Thomas Nguy <81727899+thomas-nguy@users.noreply.github.com>

* review suggestions

Co-authored-by: Thomas Nguy <81727899+thomas-nguy@users.noreply.github.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
This commit is contained in:
yihuang
2021-12-15 02:17:03 +00:00
committed by GitHub
co-authored by Thomas Nguy Federico Kunze Küllmer
parent 50e463725e
commit ccc6f5b53d
12 changed files with 145 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
x/evm/keeper/utils.go
+5 -11
View File
@@ -9,7 +9,6 @@ import (
evmtypes "github.com/tharsis/ethermint/x/evm/types"
cmath "github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core"
ethtypes "github.com/ethereum/go-ethereum/core/types"
)
@@ -54,24 +53,19 @@ func (k Keeper) DeductTxCostsFromUserBalance(
)
}
// calculate the fees paid to validators based on the effective tip and price
effectiveTip := txData.GetGasPrice()
var feeAmt *big.Int
feeMktParams := k.feeMarketKeeper.GetParams(ctx)
if london && !feeMktParams.NoBaseFee && txData.TxType() == ethtypes.DynamicFeeTxType {
baseFee := k.feeMarketKeeper.GetBaseFee(ctx)
gasFeeGap := new(big.Int).Sub(txData.GetGasFeeCap(), baseFee)
if gasFeeGap.Sign() == -1 {
if txData.GetGasFeeCap().Cmp(baseFee) < 0 {
return nil, sdkerrors.Wrapf(sdkerrors.ErrInsufficientFee, "the tx gasfeecap is lower than the tx baseFee: %s (gasfeecap), %s (basefee) ", txData.GetGasFeeCap(), baseFee)
}
effectiveTip = cmath.BigMin(txData.GetGasTipCap(), gasFeeGap)
feeAmt = txData.EffectiveFee(baseFee)
} else {
feeAmt = txData.Fee()
}
gasUsed := new(big.Int).SetUint64(txData.GetGas())
feeAmt := new(big.Int).Mul(gasUsed, effectiveTip)
fees := sdk.Coins{sdk.NewCoin(denom, sdk.NewIntFromBigInt(feeAmt))}
// deduct the full gas cost from the user balance
x/evm/keeper/utils_test.go
+8 -11
View File
@@ -5,7 +5,6 @@ import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/common"
cmath "github.com/ethereum/go-ethereum/common/math"
ethtypes "github.com/ethereum/go-ethereum/core/types"
ethparams "github.com/ethereum/go-ethereum/params"
evmkeeper "github.com/tharsis/ethermint/x/evm/keeper"
@@ -257,7 +256,9 @@ func (suite *KeeperTestSuite) TestDeductTxCostsFromUserBalance() {
oneInt := sdk.NewInt(1)
fiveInt := sdk.NewInt(5)
fiftyInt := sdk.NewInt(50)
hundredBaseFeeInt := sdk.NewInt(ethparams.InitialBaseFee * 100)
// should be enough to cover all test cases
initBalance := sdk.NewInt((ethparams.InitialBaseFee + 10) * 105)
testCases := []struct {
name string
@@ -331,15 +332,14 @@ func (suite *KeeperTestSuite) TestDeductTxCostsFromUserBalance() {
expectPass: false,
dynamicTxFee: true,
},
// TODO: is this case valid?
{
name: "empty fee failed to deduct",
name: "empty tip fee is valid to deduct",
gasLimit: 10,
gasFeeCap: big.NewInt(ethparams.InitialBaseFee),
gasTipCap: big.NewInt(1),
cost: &oneInt,
accessList: &ethtypes.AccessList{},
expectPass: false,
expectPass: true,
dynamicTxFee: true,
},
{
@@ -382,9 +382,9 @@ func (suite *KeeperTestSuite) TestDeductTxCostsFromUserBalance() {
} else {
gasTipCap = tc.gasTipCap
}
suite.app.EvmKeeper.AddBalance(suite.address, hundredBaseFeeInt.BigInt())
suite.app.EvmKeeper.AddBalance(suite.address, initBalance.BigInt())
balance := suite.app.EvmKeeper.GetBalance(suite.address)
suite.Require().Equal(balance, hundredBaseFeeInt.BigInt())
suite.Require().Equal(balance, initBalance.BigInt())
} else {
if tc.gasPrice != nil {
gasPrice = tc.gasPrice.BigInt()
@@ -414,13 +414,10 @@ func (suite *KeeperTestSuite) TestDeductTxCostsFromUserBalance() {
suite.Require().NoError(err, "valid test %d failed", i)
if tc.dynamicTxFee {
baseFee := suite.app.FeeMarketKeeper.GetBaseFee(suite.ctx)
gasFeeGap := new(big.Int).Sub(txData.GetGasFeeCap(), baseFee)
effectiveTip := cmath.BigMin(txData.GetGasTipCap(), gasFeeGap)
suite.Require().Equal(
fees,
sdk.NewCoins(
sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewIntFromBigInt(effectiveTip).Mul(sdk.NewIntFromUint64(tc.gasLimit))),
sdk.NewCoin(evmtypes.DefaultEVMDenom, sdk.NewIntFromBigInt(txData.EffectiveFee(baseFee))),
),
"valid test %d failed, fee value is wrong ", i,
)