Fix fee check for simulate mode

baseapp/abci.go

@@ -58,6 +58,7 @@ func (app *BaseApp) InitChain(ctx context.Context, req *abci.RequestInitChain) (
 		app.StoreConsensusParams(app.deliverState.ctx, req.ConsensusParams)
 		app.StoreConsensusParams(app.prepareProposalState.ctx, req.ConsensusParams)
 		app.StoreConsensusParams(app.processProposalState.ctx, req.ConsensusParams)
+		app.StoreConsensusParams(app.checkState.ctx, req.ConsensusParams)
 	}
 
 	app.SetDeliverStateToCommit()

baseapp/baseapp.go

@@ -1120,3 +1120,7 @@ func (app *BaseApp) ReloadDB() error {
 	}
 	return nil
 }
+
+func (app *BaseApp) GetCheckCtx() sdk.Context {
+	return app.checkState.ctx
+}

x/auth/ante/fee.go

@@ -13,7 +13,7 @@ import (
 
 // TxFeeChecker check if the provided fee is enough and returns the effective fee and tx priority,
 // the effective fee should be deducted later, and the priority should be returned in abci response.
-type TxFeeChecker func(ctx sdk.Context, tx sdk.Tx) (sdk.Coins, int64, error)
+type TxFeeChecker func(ctx sdk.Context, tx sdk.Tx, simulate bool) (sdk.Coins, int64, error)
 
 // DeductFeeDecorator deducts fees from the first signer of the tx
 // If the first signer does not have the funds to pay for the fees, return with InsufficientFunds error
@@ -79,7 +79,7 @@ func (d DeductFeeDecorator) AnteDeps(txDeps []sdkacltypes.AccessOperation, tx sd
 }
 
 func (dfd DeductFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
-	fee, priority, err := dfd.txFeeChecker(ctx, tx)
+	fee, priority, err := dfd.txFeeChecker(ctx, tx, simulate)
 	if err != nil {
 		return ctx, err
 	}

x/auth/ante/validator_tx_fee.go

@@ -9,7 +9,7 @@ import (
 
 // checkTxFeeWithValidatorMinGasPrices implements the default fee logic, where the minimum price per
 // unit of gas is fixed and set by each validator, can the tx priority is computed from the gas price.
-func CheckTxFeeWithValidatorMinGasPrices(ctx sdk.Context, tx sdk.Tx) (sdk.Coins, int64, error) {
+func CheckTxFeeWithValidatorMinGasPrices(ctx sdk.Context, tx sdk.Tx, simulate bool) (sdk.Coins, int64, error) {
 	feeTx, ok := tx.(sdk.FeeTx)
 	if !ok {
 		return nil, 0, sdkerrors.Wrap(sdkerrors.ErrTxDecode, "Tx must be a FeeTx")
@@ -21,7 +21,7 @@ func CheckTxFeeWithValidatorMinGasPrices(ctx sdk.Context, tx sdk.Tx) (sdk.Coins,
 	// Ensure that the provided fees meet a minimum threshold for the validator,
 	// if this is a CheckTx. This is only for local mempool purposes, and thus
 	// is only ran on check tx.
-	if ctx.IsCheckTx() {
+	if ctx.IsCheckTx() && !simulate {
 		minGasPrices := ctx.MinGasPrices()
 		if !minGasPrices.IsZero() {
 			requiredFees := make(sdk.Coins, len(minGasPrices))