go-cyber/app/ante.go

package app

import (
	errorsmod "cosmossdk.io/errors"
	wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
	wasmtypes "github.com/CosmWasm/wasmd/x/wasm/types"
	storetypes "github.com/cosmos/cosmos-sdk/store/types"
	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/v7/modules/core/ante"
	ibckeeper "github.com/cosmos/ibc-go/v7/modules/core/keeper"
)

// HandlerOptions extend the SDK's AnteHandler options by requiring the IBC
// channel keeper.
type HandlerOptions struct {
	ante.HandlerOptions

	IBCKeeper         *ibckeeper.Keeper
	WasmConfig        *wasmtypes.WasmConfig
	WasmKeeper        *wasmkeeper.Keeper
	TXCounterStoreKey storetypes.StoreKey

	TxEncoder sdk.TxEncoder

	// ProofExemptContracts is a list of CosmWasm contract addresses
	// whose "submit_proof" execute messages are exempt from gas fees.
	// This allows miners to submit PoW proofs without holding tokens.
	ProofExemptContracts []string
}

func NewAnteHandler(options HandlerOptions) (sdk.AnteHandler, error) {
	if options.AccountKeeper == nil {
		return nil, errorsmod.Wrap(sdkerrors.ErrLogic, "account keeper is required for AnteHandler")
	}

	if options.BankKeeper == nil {
		return nil, errorsmod.Wrap(sdkerrors.ErrLogic, "bank keeper is required for AnteHandler")
	}

	if options.SignModeHandler == nil {
		return nil, errorsmod.Wrap(sdkerrors.ErrLogic, "sign mode handler is required for ante builder")
	}

	if options.WasmConfig == nil {
		return nil, errorsmod.Wrap(sdkerrors.ErrLogic, "wasm config is required for ante builder")
	}

	if options.TXCounterStoreKey == nil {
		return nil, errorsmod.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),
		wasmkeeper.NewGasRegisterDecorator(options.WasmKeeper.GetGasRegister()),
		ante.NewExtensionOptionsDecorator(options.ExtensionOptionChecker),
		ante.NewValidateBasicDecorator(),
		ante.NewTxTimeoutHeightDecorator(),
		ante.NewValidateMemoDecorator(options.AccountKeeper),
		ante.NewConsumeGasForTxSizeDecorator(options.AccountKeeper),
		NewProofExemptDecorator(options.HandlerOptions, options.ProofExemptContracts),
		ante.NewSetPubKeyDecorator(options.AccountKeeper), // SetPubKeyDecorator must be called before all signature verification decorators
		ante.NewValidateSigCountDecorator(options.AccountKeeper),
		ante.NewSigGasConsumeDecorator(options.AccountKeeper, sigGasConsumer),
		ante.NewSigVerificationDecorator(options.AccountKeeper, options.SignModeHandler),
		ante.NewIncrementSequenceDecorator(options.AccountKeeper),
		ibcante.NewRedundantRelayDecorator(options.IBCKeeper),
	}

	return sdk.ChainAnteDecorators(anteDecorators...), nil
}