98 lines
2.9 KiB
Go
98 lines
2.9 KiB
Go
|
package keeper
|
||
|
|
|
||
|
|
import (
|
||
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
||
|
|
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
|
||
|
|
authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
|
||
|
|
"github.com/palantir/stacktrace"
|
||
|
|
|
||
|
|
evmtypes "github.com/tharsis/ethermint/x/evm/types"
|
||
|
|
|
||
|
|
"github.com/ethereum/go-ethereum/core"
|
||
|
|
ethtypes "github.com/ethereum/go-ethereum/core/types"
|
||
|
|
)
|
||
|
|
|
||
|
|
// AccountKeeper defines an expected keeper interface for the auth module's AccountKeeper
|
||
|
|
// DeductTxCostsFromUserBalance it calculates the tx costs and deducts the fees
|
||
|
|
func DeductTxCostsFromUserBalance(
|
||
|
|
ctx sdk.Context,
|
||
|
|
bankKeeper evmtypes.BankKeeper,
|
||
|
|
accountKeeper evmtypes.AccountKeeper,
|
||
|
|
msgEthTx evmtypes.MsgEthereumTx,
|
||
|
|
txData evmtypes.TxData,
|
||
|
|
denom string,
|
||
|
|
homestead bool,
|
||
|
|
istanbul bool,
|
||
|
|
) (sdk.Coins, error) {
|
||
|
|
isContractCreation := txData.GetTo() == nil
|
||
|
|
|
||
|
|
// fetch sender account from signature
|
||
|
|
signerAcc, err := authante.GetSignerAcc(ctx, accountKeeper, msgEthTx.GetFrom())
|
||
|
|
if err != nil {
|
||
|
|
return nil, stacktrace.Propagate(err, "account not found for sender %s", msgEthTx.From)
|
||
|
|
}
|
||
|
|
|
||
|
|
gasLimit := txData.GetGas()
|
||
|
|
|
||
|
|
var accessList ethtypes.AccessList
|
||
|
|
if txData.GetAccessList() != nil {
|
||
|
|
accessList = txData.GetAccessList()
|
||
|
|
}
|
||
|
|
|
||
|
|
intrinsicGas, err := core.IntrinsicGas(txData.GetData(), accessList, isContractCreation, homestead, istanbul)
|
||
|
|
if err != nil {
|
||
|
|
return nil, stacktrace.Propagate(sdkerrors.Wrap(
|
||
|
|
err,
|
||
|
|
"failed to compute intrinsic gas cost"), "failed to retrieve intrinsic gas, contract creation = %t; homestead = %t, istanbul = %t",
|
||
|
|
isContractCreation, homestead, istanbul,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
// intrinsic gas verification during CheckTx
|
||
|
|
if ctx.IsCheckTx() && gasLimit < intrinsicGas {
|
||
|
|
return nil, sdkerrors.Wrapf(
|
||
|
|
sdkerrors.ErrOutOfGas,
|
||
|
|
"gas limit too low: %d (gas limit) < %d (intrinsic gas)", gasLimit, intrinsicGas,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
// calculate the fees paid to validators based on gas limit and price
|
||
|
|
feeAmt := txData.Fee() // fee = gas limit * gas price
|
||
|
|
|
||
|
|
fees := sdk.Coins{sdk.NewCoin(denom, sdk.NewIntFromBigInt(feeAmt))}
|
||
|
|
|
||
|
|
// deduct the full gas cost from the user balance
|
||
|
|
if err := authante.DeductFees(bankKeeper, ctx, signerAcc, fees); err != nil {
|
||
|
|
return nil, stacktrace.Propagate(
|
||
|
|
err,
|
||
|
|
"failed to deduct full gas cost %s from the user %s balance",
|
||
|
|
fees, msgEthTx.From,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
return fees, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// CheckSenderBalance validates sender has enough funds to pay for tx cost
|
||
|
|
func CheckSenderBalance(
|
||
|
|
ctx sdk.Context,
|
||
|
|
bankKeeper evmtypes.BankKeeper,
|
||
|
|
sender sdk.AccAddress,
|
||
|
|
txData evmtypes.TxData,
|
||
|
|
denom string,
|
||
|
|
) error {
|
||
|
|
balance := bankKeeper.GetBalance(ctx, sender, denom)
|
||
|
|
cost := txData.Cost()
|
||
|
|
|
||
|
|
if balance.Amount.BigInt().Cmp(cost) < 0 {
|
||
|
|
return stacktrace.Propagate(
|
||
|
|
sdkerrors.Wrapf(
|
||
|
|
sdkerrors.ErrInsufficientFunds,
|
||
|
|
"sender balance < tx cost (%s < %s%s)", balance, txData.Cost(), denom,
|
||
|
|
),
|
||
|
|
"sender should have had enough funds to pay for tx cost = fee + amount (%s = %s + %s)",
|
||
|
|
cost, txData.Fee(), txData.GetValue(),
|
||
|
|
)
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|