simapp

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 Go to latest Published: Oct 20, 2023 License: MIT Imports: 138 Imported by: 49

README

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simapp

simapp is an application built using the Cosmos SDK for testing and educational purposes.

Running testnets with simd

If you want to spin up a quick testnet with your friends, you can follow these steps. Unless otherwise noted, every step must be done by everyone who wants to participate in this testnet.

  1. $ make build. This will build the simd binary and install it in your Cosmos SDK repo, inside a new build directory. The following instructions are run from inside that directory.

  2. If you've run simd before, you may need to reset your database before starting a new testnet: $ ./simd unsafe-reset-all

  3. $ ./simd init [moniker]. This will initialize a new working directory, by default at ~/.simapp. You need a provide a "moniker," but it doesn't matter what it is.

  4. $ ./simd keys add [key_name]. This will create a new key, with a name of your choosing. Save the output of this command somewhere; you'll need the address generated here later.

  5. $ ./simd add-genesis-account $(simd keys show [key_name] -a) [amount], where key_name is the same key name as before; and amount is something like 10000000000000000000000000stake.

  6. $ ./simd gentx [key_name] [amount] --chain-id [chain-id]. This will create the genesis transaction for your new chain.

  7. Now, one person needs to create the genesis file genesis.json using the genesis transactions from every participant, by gathering all the genesis transactions under config/gentx and then calling ./simd collect-gentxs. This will create a new genesis.json file that includes data from all the validators (we sometimes call it the "super genesis file" to distinguish it from single-validator genesis files).

  8. Once you've received the super genesis file, overwrite your original genesis.json file with the new super genesis.json.

  9. Modify your config/config.toml (in the simapp working directory) to include the other participants as persistent peers:

    # Comma separated list of nodes to keep persistent connections to
persistent_peers = "[validator address]@[ip address]:[port],[validator address]@[ip address]:[port]"

    You can find validator address by running ./simd tendermint show-node-id. (It will be hex-encoded.) By default, port is 26656.

  10. Now you can start your nodes: $ ./simd start.

Now you have a small testnet that you can use to try out changes to the Cosmos SDK or Tendermint!

NOTE: Sometimes creating the network through the collect-gentxs will fail, and validators will start in a funny state (and then panic). If this happens, you can try to create and start the network first with a single validator and then add additional validators using a create-validator transaction.

Documentation

Index

Constants

View Source 
const (
	MockFeePort string = ibcmock.ModuleName + ibcfeetypes.ModuleName
)

IBC application testing ports

Variables

View Source 
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,
			},
		),
		groupmodule.AppModuleBasic{},
		params.AppModuleBasic{},
		crisis.AppModuleBasic{},
		slashing.AppModuleBasic{},
		ibc.AppModuleBasic{},
		ibctm.AppModuleBasic{},
		solomachine.AppModuleBasic{},
		feegrantmodule.AppModuleBasic{},
		upgrade.AppModuleBasic{},
		evidence.AppModuleBasic{},
		transfer.AppModuleBasic{},
		ibcmock.AppModuleBasic{},
		ica.AppModuleBasic{},
		authzmodule.AppModuleBasic{},
		vesting.AppModuleBasic{},
		ibcfee.AppModuleBasic{},
		consensus.AppModuleBasic{},
	)
)
View Source 
var (
	FlagGenesisFileValue        string
	FlagParamsFileValue         string
	FlagExportParamsPathValue   string
	FlagExportParamsHeightValue int
	FlagExportStatePathValue    string
	FlagExportStatsPathValue    string
	FlagSeedValue               int64
	FlagInitialBlockHeightValue int
	FlagNumBlocksValue          int
	FlagBlockSizeValue          int
	FlagLeanValue               bool
	FlagCommitValue             bool
	FlagOnOperationValue        bool // TODO: Remove in favor of binary search for invariant violation
	FlagAllInvariantsValue      bool

	FlagEnabledValue     bool
	FlagVerboseValue     bool
	FlagPeriodValue      uint
	FlagGenesisTimeValue int64
)

List of available flags for the simulator

View Source 
var DefaultConsensusParams = &tmproto.ConsensusParams{
	Block: &tmproto.BlockParams{
		MaxBytes: 200000,
		MaxGas:   2000000,
	},
	Evidence: &tmproto.EvidenceParams{
		MaxAgeNumBlocks: 302400,
		MaxAgeDuration:  504 * time.Hour,
		MaxBytes:        10000,
	},
	Validator: &tmproto.ValidatorParams{
		PubKeyTypes: []string{
			tmtypes.ABCIPubKeyTypeEd25519,
		},
	},
}

DefaultConsensusParams defines the default Tendermint consensus params used in SimApp testing.

Functions

func AppStateFn 

func AppStateFn(cdc codec.JSONCodec, simManager *module.SimulationManager) simtypes.AppStateFn

AppStateFn returns the initial application state using a genesis or the simulation parameters. It panics if the user provides files for both of them. If a file is not given for the genesis or the sim params, it creates a randomized one.

func AppStateFromGenesisFileFn 

func AppStateFromGenesisFileFn(r io.Reader, cdc codec.JSONCodec, genesisFile string) (tmtypes.GenesisDoc, []simtypes.Account)

AppStateFromGenesisFileFn util function to generate the genesis AppState from a genesis.json file.

func AppStateRandomizedFn 

func AppStateRandomizedFn(
	simManager *module.SimulationManager, r *rand.Rand, cdc codec.JSONCodec,
	accs []simtypes.Account, genesisTimestamp time.Time, appParams simtypes.AppParams,
) (json.RawMessage, []simtypes.Account)

AppStateRandomizedFn creates calls each module's GenesisState generator function and creates the simulation params

func BlockedAddresses 

func BlockedAddresses() map[string]bool

func CheckExportSimulation 

func CheckExportSimulation(
	app App, config simtypes.Config, params simtypes.Params,
) error

CheckExportSimulation exports the app state and simulation parameters to JSON if the export paths are defined.

func GetMaccPerms 

func GetMaccPerms() map[string][]string

GetMaccPerms returns a copy of the module account permissions

func GetSimulationLog 

func GetSimulationLog(storeName string, sdr sdk.StoreDecoderRegistry, kvAs, kvBs []kv.Pair) (log string)

GetSimulationLog unmarshals the KVPair's Value to the corresponding type based on the each's module store key and the prefix bytes of the KVPair's key.

func GetSimulatorFlags 

func GetSimulatorFlags()

GetSimulatorFlags gets the values of all the available simulation flags

func MakeTestEncodingConfig 

func MakeTestEncodingConfig() simappparams.EncodingConfig

MakeTestEncodingConfig creates an EncodingConfig for testing. This function should be used only in tests or when creating a new app instance (NewApp*()). App user shouldn't create new codecs - use the app.AppCodec instead. [DEPRECATED]

func ModuleAccountAddrsLegacy 

func ModuleAccountAddrsLegacy() map[string]bool

ModuleAccountAddrsLegacy returns all the app's module account addresses.

func NewAnteHandler 

func NewAnteHandler(options HandlerOptions) (sdk.AnteHandler, error)

NewAnteHandler creates a new ante handler

func NewConfigFromFlags 

func NewConfigFromFlags() simulation.Config

NewConfigFromFlags creates a simulation from the retrieved values of the flags.

func PrintStats 

func PrintStats(db dbm.DB)

PrintStats prints the corresponding statistics from the app DB.

func RegisterSwaggerAPI 

func RegisterSwaggerAPI(ctx client.Context, rtr *mux.Router)

RegisterSwaggerAPI registers swagger route with API Server

func SetupSimulation 

func SetupSimulation(dirPrefix, dbName string) (simtypes.Config, dbm.DB, string, log.Logger, bool, error)

SetupSimulation creates the config, db (levelDB), temporary directory and logger for the simulation tests. If `FlagEnabledValue` is false it skips the current test. Returns error on an invalid db intantiation or temp dir creation.

func SignAndDeliver 

func SignAndDeliver(
	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)

SignAndDeliver signs and delivers a transaction. No simulation occurs as the ibc testing package causes checkState and deliverState to diverge in block time.

CONTRACT: BeginBlock must be called before this function.

func SimulationOperations 

func SimulationOperations(app App, cdc codec.JSONCodec, config simtypes.Config) []simtypes.WeightedOperation

SimulationOperations retrieves the simulation params from the provided file path and returns all the modules weighted operations

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,
	) (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 GenesisState 

type GenesisState map[string]json.RawMessage

The genesis state 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 HandlerOptions 

type HandlerOptions struct {
	ante.HandlerOptions

	IBCKeeper *keeper.Keeper
}

HandlerOptions extend the SDK's AnteHandler options by requiring the IBC keeper.

type SimApp 

type SimApp 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
	GroupKeeper           groupkeeper.Keeper
	CrisisKeeper          *crisiskeeper.Keeper
	UpgradeKeeper         *upgradekeeper.Keeper
	ParamsKeeper          paramskeeper.Keeper
	AuthzKeeper           authzkeeper.Keeper
	IBCKeeper             *ibckeeper.Keeper // IBC Keeper must be a pointer in the app, so we can SetRouter on it correctly
	IBCFeeKeeper          ibcfeekeeper.Keeper
	ICAControllerKeeper   icacontrollerkeeper.Keeper
	ICAHostKeeper         icahostkeeper.Keeper
	EvidenceKeeper        evidencekeeper.Keeper
	TransferKeeper        ibctransferkeeper.Keeper
	FeeGrantKeeper        feegrantkeeper.Keeper
	ConsensusParamsKeeper consensusparamkeeper.Keeper

	// make scoped keepers public for test purposes
	ScopedIBCKeeper           capabilitykeeper.ScopedKeeper
	ScopedTransferKeeper      capabilitykeeper.ScopedKeeper
	ScopedFeeMockKeeper       capabilitykeeper.ScopedKeeper
	ScopedICAControllerKeeper capabilitykeeper.ScopedKeeper
	ScopedICAHostKeeper       capabilitykeeper.ScopedKeeper
	ScopedIBCMockKeeper       capabilitykeeper.ScopedKeeper
	ScopedICAMockKeeper       capabilitykeeper.ScopedKeeper

	// make IBC modules public for test purposes
	// these modules are never directly routed to by the IBC Router
	ICAAuthModule ibcmock.IBCModule
	FeeMockModule ibcmock.IBCModule
	// contains filtered or unexported fields
}

SimApp 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 NewSimApp 

func NewSimApp(
	logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool, skipUpgradeHeights map[int64]bool,
	homePath string, invCheckPeriod uint, encodingConfig simappparams.EncodingConfig,
	appOpts servertypes.AppOptions, baseAppOptions ...func(*baseapp.BaseApp),
) *SimApp

NewSimApp returns a reference to an initialized SimApp.

func Setup 

func Setup(isCheckTx bool) *SimApp

Setup initializes a new SimApp. A Nop logger is set in SimApp.

func SetupWithGenesisAccounts 

func SetupWithGenesisAccounts(genAccs []authtypes.GenesisAccount, balances ...banktypes.Balance) *SimApp

SetupWithGenesisAccounts initializes a new SimApp with the provided genesis accounts and possible balances.

func SetupWithGenesisValSet 

func SetupWithGenesisValSet(valSet *tmtypes.ValidatorSet, genAccs []authtypes.GenesisAccount, balances ...banktypes.Balance) *SimApp

SetupWithGenesisValSet initializes a new SimApp 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 in the default token of the simapp from first genesis account. A Nop logger is set in SimApp.

func (*SimApp) AppCodec 

func (app *SimApp) AppCodec() codec.Codec

AppCodec returns SimApp'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 (*SimApp) BeginBlocker 

func (app *SimApp) BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock) abci.ResponseBeginBlock

BeginBlocker application updates every begin block

func (*SimApp) EndBlocker 

func (app *SimApp) EndBlocker(ctx sdk.Context, req abci.RequestEndBlock) abci.ResponseEndBlock

EndBlocker application updates every end block

func (*SimApp) ExportAppStateAndValidators 

func (app *SimApp) ExportAppStateAndValidators(
	forZeroHeight bool, jailAllowedAddrs []string,
) (servertypes.ExportedApp, error)

ExportAppStateAndValidators exports the state of the application for a genesis file.

func (*SimApp) GetBaseApp 

func (app *SimApp) GetBaseApp() *baseapp.BaseApp

GetBaseApp implements the TestingApp interface.

func (*SimApp) GetIBCKeeper 

func (app *SimApp) GetIBCKeeper() *ibckeeper.Keeper

GetIBCKeeper implements the TestingApp interface.

func (*SimApp) GetKey 

func (app *SimApp) 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 (*SimApp) GetMemKey 

func (app *SimApp) GetMemKey(storeKey string) *storetypes.MemoryStoreKey

GetMemKey returns the MemStoreKey for the provided mem key.

NOTE: This is solely used for testing purposes.

func (*SimApp) GetModuleManager 

func (app *SimApp) GetModuleManager() *module.Manager

GetModuleManager returns the app module manager NOTE: used for testing purposes

func (*SimApp) GetScopedIBCKeeper 

func (app *SimApp) GetScopedIBCKeeper() capabilitykeeper.ScopedKeeper

GetScopedIBCKeeper implements the TestingApp interface.

func (*SimApp) GetStakingKeeper 

func (app *SimApp) GetStakingKeeper() ibctestingtypes.StakingKeeper

GetStakingKeeper implements the TestingApp interface.

func (*SimApp) GetSubspace 

func (app *SimApp) 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 (*SimApp) GetTKey 

func (app *SimApp) 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 (*SimApp) GetTxConfig 

func (app *SimApp) GetTxConfig() client.TxConfig

GetTxConfig implements the TestingApp interface.

func (*SimApp) InitChainer 

func (app *SimApp) InitChainer(ctx sdk.Context, req abci.RequestInitChain) abci.ResponseInitChain

InitChainer application update at chain initialization

func (*SimApp) InterfaceRegistry 

func (app *SimApp) InterfaceRegistry() types.InterfaceRegistry

InterfaceRegistry returns SimApp's InterfaceRegistry

func (*SimApp) LegacyAmino 

func (app *SimApp) LegacyAmino() *codec.LegacyAmino

LegacyAmino returns SimApp'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 (*SimApp) LoadHeight 

func (app *SimApp) LoadHeight(height int64) error

LoadHeight loads a particular height

func (*SimApp) ModuleAccountAddrs 

func (app *SimApp) ModuleAccountAddrs() map[string]bool

ModuleAccountAddrs returns all the app's module account addresses.

func (*SimApp) Name 

func (app *SimApp) Name() string

Name returns the name of the App

func (*SimApp) RegisterAPIRoutes 

func (app *SimApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig)

RegisterAPIRoutes registers all application module routes with the provided API server.

func (*SimApp) RegisterNodeService 

func (app *SimApp) RegisterNodeService(clientCtx client.Context)

func (*SimApp) RegisterTendermintService 

func (app *SimApp) RegisterTendermintService(clientCtx client.Context)

RegisterTendermintService implements the Application.RegisterTendermintService method.

func (*SimApp) RegisterTxService 

func (app *SimApp) RegisterTxService(clientCtx client.Context)

RegisterTxService implements the Application.RegisterTxService method.

func (*SimApp) SimulationManager 

func (app *SimApp) SimulationManager() *module.SimulationManager

SimulationManager implements the SimulationApp interface

type SimGenesisAccount 

type SimGenesisAccount struct {
	*authtypes.BaseAccount

	// vesting account fields
	OriginalVesting  sdk.Coins `json:"original_vesting" yaml:"original_vesting"`   // total vesting coins upon initialization
	DelegatedFree    sdk.Coins `json:"delegated_free" yaml:"delegated_free"`       // delegated vested coins at time of delegation
	DelegatedVesting sdk.Coins `json:"delegated_vesting" yaml:"delegated_vesting"` // delegated vesting coins at time of delegation
	StartTime        int64     `json:"start_time" yaml:"start_time"`               // vesting start time (UNIX Epoch time)
	EndTime          int64     `json:"end_time" yaml:"end_time"`                   // vesting end time (UNIX Epoch time)

	// module account fields
	ModuleName        string   `json:"module_name" yaml:"module_name"`               // name of the module account
	ModulePermissions []string `json:"module_permissions" yaml:"module_permissions"` // permissions of module account
}

SimGenesisAccount defines a type that implements the GenesisAccount interface to be used for simulation accounts in the genesis state.

func (SimGenesisAccount) Validate 

func (sga SimGenesisAccount) Validate() error

Validate checks for errors on the vesting and module account parameters

Source Files

View all Source files

Directories

Path Synopsis
Package params defines the simulation parameters in the simapp.
 Package params defines the simulation parameters in the simapp.
cmd

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