Documentation ¶
Index ¶
- Constants
- Variables
- func AddTestAddrs(app *BabylonApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress
- func AddTestAddrsFromPubKeys(app *BabylonApp, ctx sdk.Context, pubKeys []cryptotypes.PubKey, ...)
- func AddTestAddrsIncremental(app *BabylonApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress
- func BlockedAddresses() map[string]bool
- func CheckBalance(t *testing.T, app *BabylonApp, addr sdk.AccAddress, balances sdk.Coins)
- func ConvertAddrsToValAddrs(addrs []sdk.AccAddress) []sdk.ValAddress
- func CreateClientConfig(chainID string, backend string, homePath string) (*config.ClientConfig, error)
- func CreateTestPubKeys(numPubKeys int) []cryptotypes.PubKey
- func FundAccount(bankKeeper bankkeeper.Keeper, ctx sdk.Context, addr sdk.AccAddress, ...) error
- func FundModuleAccount(bankKeeper bankkeeper.Keeper, ctx sdk.Context, recipientMod string, ...) error
- func GenSequenceOfTxs(txGen client.TxConfig, msgs []sdk.Msg, accNums []uint64, initSeqNums []uint64, ...) ([]sdk.Tx, error)
- func GetEncodingConfig() appparams.EncodingConfig
- func GetMaccPerms() map[string][]string
- func GetWasmEnabledProposals() []wasm.ProposalType
- func NewPubKeyFromHex(pk string) (res cryptotypes.PubKey)
- func SignCheckDeliver(t *testing.T, txCfg client.TxConfig, app *bam.BaseApp, header tmproto.Header, ...) (sdk.GasInfo, *sdk.Result, error)
- func TestAddr(addr string, bech string) (sdk.AccAddress, error)
- type App
- type BabylonApp
- func NewBabyblonAppWithCustomOptions(t *testing.T, isCheckTx bool, privSigner *PrivSigner, options SetupOptions) *BabylonApp
- func NewBabylonApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool, ...) *BabylonApp
- func Setup(t *testing.T, isCheckTx bool) *BabylonApp
- func SetupWithGenesisAccounts(genAccs []authtypes.GenesisAccount, balances ...banktypes.Balance) *BabylonApp
- func SetupWithGenesisValSet(t *testing.T, valSet *tmtypes.ValidatorSet, genAccs []authtypes.GenesisAccount, ...) *BabylonApp
- func (app *BabylonApp) AppCodec() codec.Codec
- func (app *BabylonApp) BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock) abci.ResponseBeginBlock
- func (a *BabylonApp) DefaultGenesis() map[string]json.RawMessage
- func (app *BabylonApp) EndBlocker(ctx sdk.Context, req abci.RequestEndBlock) abci.ResponseEndBlock
- func (app *BabylonApp) ExportAppStateAndValidators(forZeroHeight bool, jailAllowedAddrs []string, modulesToExport []string) (servertypes.ExportedApp, error)
- func (app *BabylonApp) GetBaseApp() *baseapp.BaseApp
- func (app *BabylonApp) GetIBCKeeper() *ibckeeper.Keeper
- func (app *BabylonApp) GetKey(storeKey string) *storetypes.KVStoreKey
- func (app *BabylonApp) GetMemKey(storeKey string) *storetypes.MemoryStoreKey
- func (app *BabylonApp) GetScopedIBCKeeper() capabilitykeeper.ScopedKeeper
- func (app *BabylonApp) GetStakingKeeper() ibctestingtypes.StakingKeeper
- func (app *BabylonApp) GetSubspace(moduleName string) paramstypes.Subspace
- func (app *BabylonApp) GetTKey(storeKey string) *storetypes.TransientStoreKey
- func (app *BabylonApp) GetTxConfig() client.TxConfig
- func (app *BabylonApp) InitChainer(ctx sdk.Context, req abci.RequestInitChain) abci.ResponseInitChain
- func (app *BabylonApp) InterfaceRegistry() types.InterfaceRegistry
- func (app *BabylonApp) LegacyAmino() *codec.LegacyAmino
- func (app *BabylonApp) LoadHeight(height int64) error
- func (app *BabylonApp) ModuleAccountAddrs() map[string]bool
- func (app *BabylonApp) ModuleManager() *module.Manager
- func (app *BabylonApp) Name() string
- func (app *BabylonApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig)
- func (app *BabylonApp) RegisterNodeService(clientCtx client.Context)
- func (app *BabylonApp) RegisterTendermintService(clientCtx client.Context)
- func (app *BabylonApp) RegisterTxService(clientCtx client.Context)
- func (app *BabylonApp) SimulationManager() *module.SimulationManager
- func (app *BabylonApp) TxConfig() client.TxConfig
- type BtcValidationDecorator
- type EmptyAppOptions
- type GenerateAccountStrategy
- type GenesisState
- type PrivSigner
- type SetupOptions
- type WrappedAnteHandler
Constants ¶
const ( // Custom prefix for application enviromental variables. // From cosmos version 0.46 is is possible to have custom prefix for application // enviromental variables - https://github.com/cosmos/cosmos-sdk/pull/10950 BabylonAppEnvPrefix = "" // According to https://github.com/CosmWasm/wasmd#genesis-configuration chains // using smart contracts should configure proper gas limits per block. // https://medium.com/cosmwasm/cosmwasm-for-ctos-iv-native-integrations-713140bf75fc // suggests 50M as reasonable limits. Me may want to adjust it later. DefaultGasLimit int64 = 50000000 )
Variables ¶
var ( // DefaultNodeHome default home directories for the application daemon DefaultNodeHome string // ModuleBasics defines the module BasicManager is in charge of setting up basic, // non-dependant module elements, such as codec registration // and genesis verification. ModuleBasics = module.NewBasicManager( auth.AppModuleBasic{}, genutil.NewAppModuleBasic(genutiltypes.DefaultMessageValidator), bank.AppModuleBasic{}, capability.AppModuleBasic{}, staking.AppModuleBasic{}, mint.AppModuleBasic{}, distr.AppModuleBasic{}, gov.NewAppModuleBasic( []govclient.ProposalHandler{ paramsclient.ProposalHandler, upgradeclient.LegacyProposalHandler, upgradeclient.LegacyCancelProposalHandler, ibcclientclient.UpdateClientProposalHandler, ibcclientclient.UpgradeProposalHandler, }, ), params.AppModuleBasic{}, consensus.AppModuleBasic{}, crisis.AppModuleBasic{}, slashing.AppModuleBasic{}, feegrantmodule.AppModuleBasic{}, upgrade.AppModuleBasic{}, evidence.AppModuleBasic{}, authzmodule.AppModuleBasic{}, vesting.AppModuleBasic{}, wasm.AppModuleBasic{}, epoching.AppModuleBasic{}, btclightclient.AppModuleBasic{}, btccheckpoint.AppModuleBasic{}, checkpointing.AppModuleBasic{}, monitor.AppModuleBasic{}, ibc.AppModuleBasic{}, ibctm.AppModuleBasic{}, transfer.AppModuleBasic{}, zoneconcierge.AppModuleBasic{}, ) )
var ( // WasmProposalsEnabled enables all x/wasm proposals when its value is "true" // and EnableSpecificWasmProposals is empty. Otherwise, all x/wasm proposals // are disabled. WasmProposalsEnabled = "true" // EnableSpecificWasmProposals, if set, must be comma-separated list of values // that are all a subset of "EnableAllProposals", which takes precedence over // WasmProposalsEnabled. // // See: https://github.com/CosmWasm/wasmd/blob/02a54d33ff2c064f3539ae12d75d027d9c665f05/x/wasm/internal/types/proposal.go#L28-L34 EnableSpecificWasmProposals = "" // EmptyWasmOpts defines a type alias for a list of wasm options. EmptyWasmOpts []wasm.Option )
Wasm related variables
Functions ¶
func AddTestAddrs ¶
func AddTestAddrs(app *BabylonApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress
AddTestAddrs constructs and returns accNum amount of accounts with an initial balance of accAmt in random order
func AddTestAddrsFromPubKeys ¶
func AddTestAddrsFromPubKeys(app *BabylonApp, ctx sdk.Context, pubKeys []cryptotypes.PubKey, accAmt math.Int)
AddTestAddrsFromPubKeys adds the addresses into the BabylonApp providing only the public keys.
func AddTestAddrsIncremental ¶
func AddTestAddrsIncremental(app *BabylonApp, ctx sdk.Context, accNum int, accAmt math.Int) []sdk.AccAddress
AddTestAddrs constructs and returns accNum amount of accounts with an initial balance of accAmt in random order
func BlockedAddresses ¶ added in v0.6.0
BlockedAddresses returns all the app's blocked account addresses.
func CheckBalance ¶
func CheckBalance(t *testing.T, app *BabylonApp, addr sdk.AccAddress, balances sdk.Coins)
CheckBalance checks the balance of an account.
func ConvertAddrsToValAddrs ¶
func ConvertAddrsToValAddrs(addrs []sdk.AccAddress) []sdk.ValAddress
ConvertAddrsToValAddrs converts the provided addresses to ValAddress.
func CreateClientConfig ¶
func CreateTestPubKeys ¶
func CreateTestPubKeys(numPubKeys int) []cryptotypes.PubKey
CreateTestPubKeys returns a total of numPubKeys public keys in ascending order.
func FundAccount ¶
func FundAccount(bankKeeper bankkeeper.Keeper, ctx sdk.Context, addr sdk.AccAddress, amounts sdk.Coins) error
FundAccount is a utility function that funds an account by minting and sending the coins to the address. This should be used for testing purposes only!
TODO: Instead of using the mint module account, which has the permission of minting, create a "faucet" account. (@fdymylja)
func FundModuleAccount ¶
func FundModuleAccount(bankKeeper bankkeeper.Keeper, ctx sdk.Context, recipientMod string, amounts sdk.Coins) error
FundModuleAccount is a utility function that funds a module account by minting and sending the coins to the address. This should be used for testing purposes only!
TODO: Instead of using the mint module account, which has the permission of minting, create a "faucet" account. (@fdymylja)
func GenSequenceOfTxs ¶
func GenSequenceOfTxs(txGen client.TxConfig, msgs []sdk.Msg, accNums []uint64, initSeqNums []uint64, numToGenerate int, priv ...cryptotypes.PrivKey) ([]sdk.Tx, error)
GenSequenceOfTxs generates a set of signed transactions of messages, such that they differ only by having the sequence numbers incremented between every transaction.
func GetEncodingConfig ¶ added in v0.6.0
func GetEncodingConfig() appparams.EncodingConfig
func GetMaccPerms ¶
GetMaccPerms returns a copy of the module account permissions
func GetWasmEnabledProposals ¶ added in v0.6.0
func GetWasmEnabledProposals() []wasm.ProposalType
GetWasmEnabledProposals parses the WasmProposalsEnabled and EnableSpecificWasmProposals values to produce a list of enabled proposals to pass into the application.
func NewPubKeyFromHex ¶
func NewPubKeyFromHex(pk string) (res cryptotypes.PubKey)
NewPubKeyFromHex returns a PubKey from a hex string.
func SignCheckDeliver ¶
func SignCheckDeliver( t *testing.T, txCfg client.TxConfig, app *bam.BaseApp, header tmproto.Header, msgs []sdk.Msg, chainID string, accNums, accSeqs []uint64, expSimPass, expPass bool, priv ...cryptotypes.PrivKey, ) (sdk.GasInfo, *sdk.Result, error)
SignCheckDeliver checks a generated signed transaction and simulates a block commitment with the given transaction. A test assertion is made using the parameter 'expPass' against the result. A corresponding result is returned.
Types ¶
type App ¶
type App interface { // The assigned name of the app. Name() string // The application types codec. // NOTE: This shoult be sealed before being returned. LegacyAmino() *codec.LegacyAmino // Application updates every begin block. BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock) abci.ResponseBeginBlock // Application updates every end block. EndBlocker(ctx sdk.Context, req abci.RequestEndBlock) abci.ResponseEndBlock // Application update at chain (i.e app) initialization. InitChainer(ctx sdk.Context, req abci.RequestInitChain) abci.ResponseInitChain // Loads the app at a given height. LoadHeight(height int64) error // Exports the state of the application for a genesis file. ExportAppStateAndValidators( forZeroHeight bool, jailAllowedAddrs []string, modulesToExport []string, ) (types.ExportedApp, error) // All the registered module account addreses. ModuleAccountAddrs() map[string]bool // Helper for the simulation framework. SimulationManager() *module.SimulationManager }
App implements the common methods for a Cosmos SDK-based application specific blockchain.
type BabylonApp ¶
type BabylonApp struct { *baseapp.BaseApp // keepers AccountKeeper authkeeper.AccountKeeper BankKeeper bankkeeper.Keeper CapabilityKeeper *capabilitykeeper.Keeper StakingKeeper *stakingkeeper.Keeper SlashingKeeper slashingkeeper.Keeper MintKeeper mintkeeper.Keeper DistrKeeper distrkeeper.Keeper GovKeeper govkeeper.Keeper CrisisKeeper *crisiskeeper.Keeper UpgradeKeeper *upgradekeeper.Keeper ParamsKeeper paramskeeper.Keeper AuthzKeeper authzkeeper.Keeper EvidenceKeeper evidencekeeper.Keeper FeeGrantKeeper feegrantkeeper.Keeper ConsensusParamsKeeper consensusparamkeeper.Keeper // Babylon modules EpochingKeeper epochingkeeper.Keeper BTCLightClientKeeper btclightclientkeeper.Keeper BtcCheckpointKeeper btccheckpointkeeper.Keeper CheckpointingKeeper checkpointingkeeper.Keeper MonitorKeeper monitorkeeper.Keeper // IBC-related modules IBCKeeper *ibckeeper.Keeper // IBC Keeper must be a pointer in the app, so we can SetRouter on it correctly TransferKeeper ibctransferkeeper.Keeper // for cross-chain fungible token transfers ZoneConciergeKeeper zckeeper.Keeper // for cross-chain fungible token transfers WasmKeeper wasm.Keeper // make scoped keepers public for test purposes ScopedIBCKeeper capabilitykeeper.ScopedKeeper ScopedTransferKeeper capabilitykeeper.ScopedKeeper ScopedZoneConciergeKeeper capabilitykeeper.ScopedKeeper ScopedWasmKeeper capabilitykeeper.ScopedKeeper // contains filtered or unexported fields }
BabylonApp extends an ABCI application, but with most of its parameters exported. They are exported for convenience in creating helper functions, as object capabilities aren't needed for testing.
func NewBabyblonAppWithCustomOptions ¶
func NewBabyblonAppWithCustomOptions(t *testing.T, isCheckTx bool, privSigner *PrivSigner, options SetupOptions) *BabylonApp
NewBabyblonAppWithCustomOptions initializes a new BabylonApp with custom options. Created Babylon application will have one validator with hardoced amout of tokens. This is necessary as from cosmos-sdk 0.46 it is required that there is at least one validator in validator set during InitGenesis abci call - https://github.com/cosmos/cosmos-sdk/pull/9697
func NewBabylonApp ¶
func NewBabylonApp( logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool, skipUpgradeHeights map[int64]bool, homePath string, invCheckPeriod uint, encodingConfig appparams.EncodingConfig, privSigner *PrivSigner, appOpts servertypes.AppOptions, wasmEnabledProposals []wasm.ProposalType, wasmOpts []wasm.Option, baseAppOptions ...func(*baseapp.BaseApp), ) *BabylonApp
NewBabylonApp returns a reference to an initialized BabylonApp.
func Setup ¶
func Setup(t *testing.T, isCheckTx bool) *BabylonApp
Setup initializes a new BabylonApp. A Nop logger is set in BabylonApp. Created Babylon application will have one validator with hardoced amout of tokens. This is necessary as from cosmos-sdk 0.46 it is required that there is at least one validator in validator set during InitGenesis abci call - https://github.com/cosmos/cosmos-sdk/pull/9697
func SetupWithGenesisAccounts ¶
func SetupWithGenesisAccounts(genAccs []authtypes.GenesisAccount, balances ...banktypes.Balance) *BabylonApp
SetupWithGenesisAccounts initializes a new BabylonApp with the provided genesis accounts and possible balances.
func SetupWithGenesisValSet ¶
func SetupWithGenesisValSet(t *testing.T, valSet *tmtypes.ValidatorSet, genAccs []authtypes.GenesisAccount, balances ...banktypes.Balance) *BabylonApp
SetupWithGenesisValSet initializes a new BabylonApp with a validator set and genesis accounts that also act as delegators. For simplicity, each validator is bonded with a delegation of one consensus engine unit (10^6) in the default token of the babylon app from first genesis account. A Nop logger is set in BabylonApp.
func (*BabylonApp) AppCodec ¶
func (app *BabylonApp) AppCodec() codec.Codec
AppCodec returns BabylonApp's app codec.
NOTE: This is solely to be used for testing purposes as it may be desirable for modules to register their own custom testing types.
func (*BabylonApp) BeginBlocker ¶
func (app *BabylonApp) BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock) abci.ResponseBeginBlock
BeginBlocker application updates every begin block
func (*BabylonApp) DefaultGenesis ¶ added in v0.6.0
func (a *BabylonApp) DefaultGenesis() map[string]json.RawMessage
DefaultGenesis returns a default genesis from the registered AppModuleBasic's.
func (*BabylonApp) EndBlocker ¶
func (app *BabylonApp) EndBlocker(ctx sdk.Context, req abci.RequestEndBlock) abci.ResponseEndBlock
EndBlocker application updates every end block
func (*BabylonApp) ExportAppStateAndValidators ¶
func (app *BabylonApp) ExportAppStateAndValidators( forZeroHeight bool, jailAllowedAddrs []string, modulesToExport []string) (servertypes.ExportedApp, error)
ExportAppStateAndValidators exports the state of the application for a genesis file.
func (*BabylonApp) GetBaseApp ¶
func (app *BabylonApp) GetBaseApp() *baseapp.BaseApp
GetBaseApp returns the BaseApp of BabylonApp required by ibctesting
func (*BabylonApp) GetIBCKeeper ¶
func (app *BabylonApp) GetIBCKeeper() *ibckeeper.Keeper
func (*BabylonApp) GetKey ¶
func (app *BabylonApp) GetKey(storeKey string) *storetypes.KVStoreKey
GetKey returns the KVStoreKey for the provided store key.
NOTE: This is solely to be used for testing purposes.
func (*BabylonApp) GetMemKey ¶
func (app *BabylonApp) GetMemKey(storeKey string) *storetypes.MemoryStoreKey
GetMemKey returns the MemStoreKey for the provided mem key.
NOTE: This is solely used for testing purposes.
func (*BabylonApp) GetScopedIBCKeeper ¶
func (app *BabylonApp) GetScopedIBCKeeper() capabilitykeeper.ScopedKeeper
func (*BabylonApp) GetStakingKeeper ¶
func (app *BabylonApp) GetStakingKeeper() ibctestingtypes.StakingKeeper
func (*BabylonApp) GetSubspace ¶
func (app *BabylonApp) GetSubspace(moduleName string) paramstypes.Subspace
GetSubspace returns a param subspace for a given module name.
NOTE: This is solely to be used for testing purposes.
func (*BabylonApp) GetTKey ¶
func (app *BabylonApp) GetTKey(storeKey string) *storetypes.TransientStoreKey
GetTKey returns the TransientStoreKey for the provided store key.
NOTE: This is solely to be used for testing purposes.
func (*BabylonApp) GetTxConfig ¶
func (app *BabylonApp) GetTxConfig() client.TxConfig
func (*BabylonApp) InitChainer ¶
func (app *BabylonApp) InitChainer(ctx sdk.Context, req abci.RequestInitChain) abci.ResponseInitChain
InitChainer application update at chain initialization
func (*BabylonApp) InterfaceRegistry ¶
func (app *BabylonApp) InterfaceRegistry() types.InterfaceRegistry
InterfaceRegistry returns babylonApp's InterfaceRegistry
func (*BabylonApp) LegacyAmino ¶
func (app *BabylonApp) LegacyAmino() *codec.LegacyAmino
LegacyAmino returns BabylonApp's amino codec.
NOTE: This is solely to be used for testing purposes as it may be desirable for modules to register their own custom testing types.
func (*BabylonApp) LoadHeight ¶
func (app *BabylonApp) LoadHeight(height int64) error
LoadHeight loads a particular height
func (*BabylonApp) ModuleAccountAddrs ¶
func (app *BabylonApp) ModuleAccountAddrs() map[string]bool
ModuleAccountAddrs returns all the app's module account addresses.
func (*BabylonApp) ModuleManager ¶
func (app *BabylonApp) ModuleManager() *module.Manager
func (*BabylonApp) RegisterAPIRoutes ¶
func (app *BabylonApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig)
RegisterAPIRoutes registers all application module routes with the provided API server.
func (*BabylonApp) RegisterNodeService ¶ added in v0.6.0
func (app *BabylonApp) RegisterNodeService(clientCtx client.Context)
func (*BabylonApp) RegisterTendermintService ¶
func (app *BabylonApp) RegisterTendermintService(clientCtx client.Context)
RegisterTendermintService implements the Application.RegisterTendermintService method.
func (*BabylonApp) RegisterTxService ¶
func (app *BabylonApp) RegisterTxService(clientCtx client.Context)
RegisterTxService implements the Application.RegisterTxService method.
func (*BabylonApp) SimulationManager ¶
func (app *BabylonApp) SimulationManager() *module.SimulationManager
SimulationManager implements the SimulationApp interface
func (*BabylonApp) TxConfig ¶ added in v0.6.0
func (app *BabylonApp) TxConfig() client.TxConfig
type BtcValidationDecorator ¶
type BtcValidationDecorator struct { BtcCfg bbn.BtcConfig // contains filtered or unexported fields }
func NewBtcValidationDecorator ¶
func NewBtcValidationDecorator( cfg bbn.BtcConfig, k *btccheckpointkeeper.Keeper, ) BtcValidationDecorator
func (BtcValidationDecorator) AnteHandle ¶
type EmptyAppOptions ¶
type EmptyAppOptions struct{}
EmptyAppOptions is a stub implementing AppOptions
func (EmptyAppOptions) Get ¶
func (ao EmptyAppOptions) Get(o string) interface{}
Get implements AppOptions
type GenerateAccountStrategy ¶
type GenerateAccountStrategy func(int) []sdk.AccAddress
type GenesisState ¶
type GenesisState map[string]json.RawMessage
GenesisState of the blockchain is represented here as a map of raw json messages key'd by a identifier string. The identifier is used to determine which module genesis information belongs to so it may be appropriately routed during init chain. Within this application default genesis information is retrieved from the ModuleBasicManager which populates json from each BasicModule object provided to it during init.
func NewDefaultGenesisState ¶
func NewDefaultGenesisState(cdc codec.JSONCodec) GenesisState
NewDefaultGenesisState generates the default state for the application.
type PrivSigner ¶
type PrivSigner struct { WrappedPV *privval.WrappedFilePV ClientCtx client.Context }
func InitPrivSigner ¶
func InitPrivSigner(clientCtx client.Context, nodeDir string, kr keyring.Keyring, feePayer string, encodingCfg appparams.EncodingConfig) (*PrivSigner, error)
func SetupPrivSigner ¶
func SetupPrivSigner() (*PrivSigner, error)
SetupPrivSigner sets up a PrivSigner for testing
type SetupOptions ¶
type SetupOptions struct { Logger log.Logger DB *dbm.MemDB InvCheckPeriod uint HomePath string SkipUpgradeHeights map[int64]bool EncConfig params.EncodingConfig AppOpts types.AppOptions }
SetupOptions defines arguments that are passed into `Simapp` constructor.
type WrappedAnteHandler ¶
type WrappedAnteHandler struct {
// contains filtered or unexported fields
}
WrappedAnteHandler is the wrapped AnteHandler that implements the `AnteDecorator` interface, which has a single function `AnteHandle`. It allows us to chain an existing AnteHandler with other decorators by using `sdk.ChainAnteDecorators`.
func NewWrappedAnteHandler ¶
func NewWrappedAnteHandler(ah sdk.AnteHandler) WrappedAnteHandler
NewWrappedAnteHandler creates a new WrappedAnteHandler for a given AnteHandler.