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bug: use custom ante handler to reject redundant transactions in sima…
…pp (cosmos#884) * add custom ante handler * add godoc and changelog entry Co-authored-by: Carlos Rodriguez <[email protected]>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,56 @@ | ||
package simapp | ||
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import ( | ||
sdk "github.com/cosmos/cosmos-sdk/types" | ||
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" | ||
"github.com/cosmos/cosmos-sdk/x/auth/ante" | ||
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channelkeeper "github.com/cosmos/ibc-go/v3/modules/core/04-channel/keeper" | ||
ibcante "github.com/cosmos/ibc-go/v3/modules/core/ante" | ||
) | ||
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// HandlerOptions extend the SDK's AnteHandler options by requiring the IBC | ||
// channel keeper. | ||
type HandlerOptions struct { | ||
ante.HandlerOptions | ||
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IBCChannelkeeper channelkeeper.Keeper | ||
} | ||
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// NewAnteHandler creates a new ante handler | ||
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") | ||
} | ||
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var sigGasConsumer = options.SigGasConsumer | ||
if sigGasConsumer == nil { | ||
sigGasConsumer = ante.DefaultSigVerificationGasConsumer | ||
} | ||
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anteDecorators := []sdk.AnteDecorator{ | ||
ante.NewSetUpContextDecorator(), | ||
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.IBCChannelkeeper), | ||
} | ||
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return sdk.ChainAnteDecorators(anteDecorators...), nil | ||
} |
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