feat: prepare ante handler with wasm decorators

app/ante.go

@@ -0,0 +1,67 @@
+package app
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
+	"github.com/cosmos/cosmos-sdk/x/auth/ante"
+	ibcante "github.com/cosmos/ibc-go/v3/modules/core/ante"
+	"github.com/cosmos/ibc-go/v3/modules/core/keeper"
+
+	wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
+	wasmTypes "github.com/CosmWasm/wasmd/x/wasm/types"
+)
+
+// HandlerOptions extend the SDK's AnteHandler options by requiring the IBC
+// channel keeper.
+type HandlerOptions struct {
+	ante.HandlerOptions
+
+	IBCKeeper         *keeper.Keeper
+	WasmConfig        *wasmTypes.WasmConfig
+	TXCounterStoreKey sdk.StoreKey
+}
+
+func NewAnteHandler(options HandlerOptions) (sdk.AnteHandler, error) {
+	if options.AccountKeeper == nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "account keeper is required for AnteHandler")
+	}
+	if options.BankKeeper == nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "bank keeper is required for AnteHandler")
+	}
+	if options.SignModeHandler == nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "sign mode handler is required for ante builder")
+	}
+	if options.WasmConfig == nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "wasm config is required for ante builder")
+	}
+	if options.TXCounterStoreKey == nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrLogic, "tx counter key is required for ante builder")
+	}
+
+	sigGasConsumer := options.SigGasConsumer
+	if sigGasConsumer == nil {
+		sigGasConsumer = ante.DefaultSigVerificationGasConsumer
+	}
+
+	anteDecorators := []sdk.AnteDecorator{
+		ante.NewSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
+		wasmkeeper.NewLimitSimulationGasDecorator(options.WasmConfig.SimulationGasLimit), // after setup context to enforce limits early
+		wasmkeeper.NewCountTXDecorator(options.TXCounterStoreKey),
+		ante.NewRejectExtensionOptionsDecorator(),
+		ante.NewMempoolFeeDecorator(),
+		ante.NewValidateBasicDecorator(),
+		ante.NewTxTimeoutHeightDecorator(),
+		ante.NewValidateMemoDecorator(options.AccountKeeper),
+		ante.NewConsumeGasForTxSizeDecorator(options.AccountKeeper),
+		ante.NewDeductFeeDecorator(options.AccountKeeper, options.BankKeeper, options.FeegrantKeeper),
+		// SetPubKeyDecorator must be called before all signature verification decorators
+		ante.NewSetPubKeyDecorator(options.AccountKeeper),
+		ante.NewValidateSigCountDecorator(options.AccountKeeper),
+		ante.NewSigGasConsumeDecorator(options.AccountKeeper, sigGasConsumer),
+		ante.NewSigVerificationDecorator(options.AccountKeeper, options.SignModeHandler),
+		ante.NewIncrementSequenceDecorator(options.AccountKeeper),
+		ibcante.NewAnteDecorator(options.IBCKeeper),
+	}
+
+	return sdk.ChainAnteDecorators(anteDecorators...), nil
+}