ante

package
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 Go to latest Published: Apr 16, 2021 License: Apache-2.0 Imports: 16 Imported by: 1

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ConsumeMultisignatureVerificationGas 

func ConsumeMultisignatureVerificationGas(
	meter sdk.GasMeter, sig *signing.MultiSignatureData, pubkey multisig.PubKey,
	params types.Params, accSeq uint64,
) error

ConsumeMultisignatureVerificationGas consumes gas from a GasMeter for verifying a multisig pubkey signature

func CountSubKeys 

func CountSubKeys(pub cryptotypes.PubKey) int

CountSubKeys counts the total number of keys for a multi-sig public key.

func DeductFees 

func DeductFees(bankKeeper types.BankKeeper, ctx sdk.Context, acc types.AccountI, fees sdk.Coins) error

DeductFees deducts fees from the given account.

func DefaultSigVerificationGasConsumer 

func DefaultSigVerificationGasConsumer(
	meter sdk.GasMeter, sig signing.SignatureV2, params types.Params,
) error

DefaultSigVerificationGasConsumer is the default implementation of SignatureVerificationGasConsumer. It consumes gas for signature verification based upon the public key type. The cost is fetched from the given params and is matched by the concrete type.

func GetSignerAcc 

func GetSignerAcc(ctx sdk.Context, ak AccountKeeper, addr sdk.AccAddress) (types.AccountI, error)

GetSignerAcc returns an account for a given address that is expected to sign a transaction.

func NewAnteHandler 

func NewAnteHandler(
	ak AccountKeeper, bankKeeper types.BankKeeper,
	sigGasConsumer SignatureVerificationGasConsumer,
	signModeHandler signing.SignModeHandler,
) sdk.AnteHandler

NewAnteHandler returns an AnteHandler that checks and increments sequence numbers, checks signatures & account numbers, and deducts fees from the first signer.

func OnlyLegacyAminoSigners 

func OnlyLegacyAminoSigners(sigData signing.SignatureData) bool

OnlyLegacyAminoSigners checks SignatureData to see if all signers are using SIGN_MODE_LEGACY_AMINO_JSON. If this is the case then the corresponding SignatureV2 struct will not have account sequence explicitly set, and we should skip the explicit verification of sig.Sequence in the SigVerificationDecorator's AnteHandler function.

func SetGasMeter 

func SetGasMeter(simulate bool, ctx sdk.Context, gasLimit uint64) sdk.Context

SetGasMeter returns a new context with a gas meter set from a given context.

Types

type AccountKeeper 

type AccountKeeper interface {
	GetParams(ctx sdk.Context) (params types.Params)
	GetAccount(ctx sdk.Context, addr sdk.AccAddress) types.AccountI
	SetAccount(ctx sdk.Context, acc types.AccountI)
	GetModuleAddress(moduleName string) sdk.AccAddress
}

AccountKeeper defines the contract needed for AccountKeeper related APIs. Interface provides support to use non-sdk AccountKeeper for AnteHandler's decorators.

type ConsumeTxSizeGasDecorator 

type ConsumeTxSizeGasDecorator struct {
	// contains filtered or unexported fields
}

ConsumeTxSizeGasDecorator will take in parameters and consume gas proportional to the size of tx before calling next AnteHandler. Note, the gas costs will be slightly over estimated due to the fact that any given signing account may need to be retrieved from state.

CONTRACT: If simulate=true, then signatures must either be completely filled in or empty. CONTRACT: To use this decorator, signatures of transaction must be represented as legacytx.StdSignature otherwise simulate mode will incorrectly estimate gas cost.

func NewConsumeGasForTxSizeDecorator 

func NewConsumeGasForTxSizeDecorator(ak AccountKeeper) ConsumeTxSizeGasDecorator

func (ConsumeTxSizeGasDecorator) AnteHandle 

func (cgts ConsumeTxSizeGasDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

type DeductFeeDecorator 

type DeductFeeDecorator struct {
	// contains filtered or unexported fields
}

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 Call next AnteHandler if fees successfully deducted CONTRACT: Tx must implement FeeTx interface to use DeductFeeDecorator

func NewDeductFeeDecorator 

func NewDeductFeeDecorator(ak AccountKeeper, bk types.BankKeeper) DeductFeeDecorator

func (DeductFeeDecorator) AnteHandle 

func (dfd DeductFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error)

type GasTx 

type GasTx interface {
	sdk.Tx
	GetGas() uint64
}

GasTx defines a Tx with a GetGas() method which is needed to use SetUpContextDecorator

type HasExtensionOptionsTx 

type HasExtensionOptionsTx interface {
	GetExtensionOptions() []*codectypes.Any
	GetNonCriticalExtensionOptions() []*codectypes.Any
}

type IncrementSequenceDecorator 

type IncrementSequenceDecorator struct {
	// contains filtered or unexported fields
}

IncrementSequenceDecorator handles incrementing sequences of all signers. Use the IncrementSequenceDecorator decorator to prevent replay attacks. Note, there is no need to execute IncrementSequenceDecorator on RecheckTX since CheckTx would already bump the sequence number.

NOTE: Since CheckTx and DeliverTx state are managed separately, subsequent and sequential txs orginating from the same account cannot be handled correctly in a reliable way unless sequence numbers are managed and tracked manually by a client. It is recommended to instead use multiple messages in a tx.

func NewIncrementSequenceDecorator 

func NewIncrementSequenceDecorator(ak AccountKeeper) IncrementSequenceDecorator

func (IncrementSequenceDecorator) AnteHandle 

func (isd IncrementSequenceDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

type MempoolFeeDecorator 

type MempoolFeeDecorator struct{}

MempoolFeeDecorator will check if the transaction's fee is at least as large as the local validator's minimum gasFee (defined in validator config). If fee is too low, decorator returns error and tx is rejected from mempool. Note this only applies when ctx.CheckTx = true If fee is high enough or not CheckTx, then call next AnteHandler CONTRACT: Tx must implement FeeTx to use MempoolFeeDecorator

func NewMempoolFeeDecorator 

func NewMempoolFeeDecorator() MempoolFeeDecorator

func (MempoolFeeDecorator) AnteHandle 

func (mfd MempoolFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error)

type RejectExtensionOptionsDecorator 

type RejectExtensionOptionsDecorator struct{}

RejectExtensionOptionsDecorator is an AnteDecorator that rejects all extension options which can optionally be included in protobuf transactions. Users that need extension options should create a custom AnteHandler chain that handles needed extension options properly and rejects unknown ones.

func NewRejectExtensionOptionsDecorator 

func NewRejectExtensionOptionsDecorator() RejectExtensionOptionsDecorator

NewRejectExtensionOptionsDecorator creates a new RejectExtensionOptionsDecorator

func (RejectExtensionOptionsDecorator) AnteHandle 

func (r RejectExtensionOptionsDecorator) AnteHandle(ctx types.Context, tx types.Tx, simulate bool, next types.AnteHandler) (newCtx types.Context, err error)

AnteHandle implements the AnteDecorator.AnteHandle method

type RejectFeeGranterDecorator 

type RejectFeeGranterDecorator struct{}

RejectFeeGranterDecorator is an AnteDecorator which rejects transactions which have the Fee.granter field set. It is to be used by chains which do not support fee grants.

func NewRejectFeeGranterDecorator 

func NewRejectFeeGranterDecorator() RejectFeeGranterDecorator

NewRejectFeeGranterDecorator returns a new RejectFeeGranterDecorator.

func (RejectFeeGranterDecorator) AnteHandle 

func (d RejectFeeGranterDecorator) AnteHandle(ctx types.Context, tx types.Tx, simulate bool, next types.AnteHandler) (newCtx types.Context, err error)

type SetPubKeyDecorator 

type SetPubKeyDecorator struct {
	// contains filtered or unexported fields
}

SetPubKeyDecorator sets PubKeys in context for any signer which does not already have pubkey set PubKeys must be set in context for all signers before any other sigverify decorators run CONTRACT: Tx must implement SigVerifiableTx interface

func NewSetPubKeyDecorator 

func NewSetPubKeyDecorator(ak AccountKeeper) SetPubKeyDecorator

func (SetPubKeyDecorator) AnteHandle 

func (spkd SetPubKeyDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

type SetUpContextDecorator 

type SetUpContextDecorator struct{}

SetUpContextDecorator sets the GasMeter in the Context and wraps the next AnteHandler with a defer clause to recover from any downstream OutOfGas panics in the AnteHandler chain to return an error with information on gas provided and gas used. CONTRACT: Must be first decorator in the chain CONTRACT: Tx must implement GasTx interface

func NewSetUpContextDecorator 

func NewSetUpContextDecorator() SetUpContextDecorator

func (SetUpContextDecorator) AnteHandle 

func (sud SetUpContextDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error)

type SigGasConsumeDecorator 

type SigGasConsumeDecorator struct {
	// contains filtered or unexported fields
}

Consume parameter-defined amount of gas for each signature according to the passed-in SignatureVerificationGasConsumer function before calling the next AnteHandler CONTRACT: Pubkeys are set in context for all signers before this decorator runs CONTRACT: Tx must implement SigVerifiableTx interface

func NewSigGasConsumeDecorator 

func NewSigGasConsumeDecorator(ak AccountKeeper, sigGasConsumer SignatureVerificationGasConsumer) SigGasConsumeDecorator

func (SigGasConsumeDecorator) AnteHandle 

func (sgcd SigGasConsumeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error)

type SigVerificationDecorator 

type SigVerificationDecorator struct {
	// contains filtered or unexported fields
}

Verify all signatures for a tx and return an error if any are invalid. Note, the SigVerificationDecorator decorator will not get executed on ReCheck.

CONTRACT: Pubkeys are set in context for all signers before this decorator runs CONTRACT: Tx must implement SigVerifiableTx interface

func NewSigVerificationDecorator 

func NewSigVerificationDecorator(ak AccountKeeper, signModeHandler authsigning.SignModeHandler) SigVerificationDecorator

func (SigVerificationDecorator) AnteHandle 

func (svd SigVerificationDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error)

type SignatureVerificationGasConsumer 

type SignatureVerificationGasConsumer = func(meter sdk.GasMeter, sig signing.SignatureV2, params types.Params) error

SignatureVerificationGasConsumer is the type of function that is used to both consume gas when verifying signatures and also to accept or reject different types of pubkeys This is where apps can define their own PubKey

type TxTimeoutHeightDecorator 

type TxTimeoutHeightDecorator struct{}

TxTimeoutHeightDecorator defines an AnteHandler decorator that checks for a tx height timeout.

func (TxTimeoutHeightDecorator) AnteHandle 

func (txh TxTimeoutHeightDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

AnteHandle implements an AnteHandler decorator for the TxHeightTimeoutDecorator type where the current block height is checked against the tx's height timeout. If a height timeout is provided (non-zero) and is less than the current block height, then an error is returned.

type TxWithTimeoutHeight 

type TxWithTimeoutHeight interface {
	sdk.Tx

	GetTimeoutHeight() uint64
}

TxWithTimeoutHeight defines the interface a tx must implement in order for TxHeightTimeoutDecorator to process the tx.

type ValidateBasicDecorator 

type ValidateBasicDecorator struct{}

ValidateBasicDecorator will call tx.ValidateBasic and return any non-nil error. If ValidateBasic passes, decorator calls next AnteHandler in chain. Note, ValidateBasicDecorator decorator will not get executed on ReCheckTx since it is not dependent on application state.

func NewValidateBasicDecorator 

func NewValidateBasicDecorator() ValidateBasicDecorator

func (ValidateBasicDecorator) AnteHandle 

func (vbd ValidateBasicDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

type ValidateMemoDecorator 

type ValidateMemoDecorator struct {
	// contains filtered or unexported fields
}

ValidateMemoDecorator will validate memo given the parameters passed in If memo is too large decorator returns with error, otherwise call next AnteHandler CONTRACT: Tx must implement TxWithMemo interface

func NewValidateMemoDecorator 

func NewValidateMemoDecorator(ak AccountKeeper) ValidateMemoDecorator

func (ValidateMemoDecorator) AnteHandle 

func (vmd ValidateMemoDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

type ValidateSigCountDecorator 

type ValidateSigCountDecorator struct {
	// contains filtered or unexported fields
}

ValidateSigCountDecorator takes in Params and returns errors if there are too many signatures in the tx for the given params otherwise it calls next AnteHandler Use this decorator to set parameterized limit on number of signatures in tx CONTRACT: Tx must implement SigVerifiableTx interface

func NewValidateSigCountDecorator 

func NewValidateSigCountDecorator(ak AccountKeeper) ValidateSigCountDecorator

func (ValidateSigCountDecorator) AnteHandle 

func (vscd ValidateSigCountDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error)

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