simapp

package module
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 Go to latest Published: Nov 5, 2024 License: MIT Imports: 122 Imported by: 0

README

SimApp

SimApp is a CLI application built using the Cosmos SDK for testing and educational purposes.

Running Testnets with simd

Want to spin up a quick testnet with your friends? Follow these steps. Unless stated otherwise, all participants in the testnet must follow through with each step.

1. Download and Setup

Download IBC-go and unzip it. You can do this manually (via the GitHub UI) or with the git clone command:

git clone github.com/cosmos/ibc-go.git

Next, run this command to build the simd binary in the build directory:

make build

Use the following command and skip all the next steps to configure your SimApp node:

make init-simapp

If you've run simd in the past, you may need to reset your database before starting up a new testnet. You can do that with this command:

# you need to provide the moniker and chain ID
$ ./simd init [moniker] --chain-id [chain-id]

The command should initialize a new working directory at the ~simapp location. The moniker and chain-id can be anything, but you must use the same chain-id subsequently.

2. Create a New Key

Execute this command to create a new key:

 ./simd keys add [key_name]

⚠️ The command will create a new key with your chosen name. Save the output somewhere safe; you'll need the address later.

3. Add Genesis Account

Add a genesis account to your testnet blockchain:

./simd genesis add-genesis-account [key_name] [amount]

Where key_name is the same key name as before, and the amount is something like 10000000000000000000000000stake.

4. Add the Genesis Transaction

This creates the genesis transaction for your testnet chain:

./simd genesis gentx [key_name] [amount] --chain-id [chain-id]

The amount should be at least 1000000000stake. Providing too much or too little may result in errors when you start your node.

5. Create the Genesis File

A participant must create the genesis file genesis.json with every participant's transaction. You can do this by gathering all the Genesis transactions under config/gentx and then executing this command:

./simd genesis collect-gentxs

The command will create a new genesis.json file that includes data from all the validators. We sometimes call this the "super genesis file" to distinguish it from single-validator genesis files.

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

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 executing:

./simd comet show-node-id

The output will be the hex-encoded validator_address. The default port is 26656.

6. Start the Nodes

Finally, execute this command to start your nodes:

./simd start

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

⚠️ 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

This section is empty.

Variables

View Source 
var (
	// DefaultNodeHome default home directories for the application daemon
	DefaultNodeHome string
)

Functions

func BlockedAddresses 

func BlockedAddresses() map[string]bool

BlockedAddresses returns all the app's blocked account addresses.

func GetMaccPerms 

func GetMaccPerms() map[string][]string

GetMaccPerms returns a copy of the module account permissions

NOTE: This is solely to be used for testing purposes.

func NewAnteHandler 

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

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

Types

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.

type HandlerOptions 

type HandlerOptions struct {
	ante.HandlerOptions
	CircuitKeeper circuitante.CircuitBreaker
	IBCKeeper     *keeper.Keeper
}

HandlerOptions are the options required for constructing a default SDK AnteHandler.

type SimApp 

type SimApp struct {
	*baseapp.BaseApp

	// keepers
	AccountKeeper         authkeeper.AccountKeeper
	BankKeeper            bankkeeper.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
	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
	GroupKeeper           groupkeeper.Keeper
	ConsensusParamsKeeper consensusparamkeeper.Keeper
	CircuitKeeper         circuitkeeper.Keeper

	// the module manager
	ModuleManager      *module.Manager
	BasicModuleManager module.BasicManager
	// 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.

func NewSimApp 

func NewSimApp(
	logger log.Logger,
	db dbm.DB,
	traceStore io.Writer,
	loadLatest bool,
	appOpts servertypes.AppOptions,
	baseAppOptions ...func(*baseapp.BaseApp),
) *SimApp

NewSimApp returns a reference to an initialized 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) AutoCliOpts 

func (app *SimApp) AutoCliOpts() autocli.AppOptions

AutoCliOpts returns the autocli options for the app.

func (*SimApp) BeginBlocker 

func (app *SimApp) BeginBlocker(ctx sdk.Context) (sdk.BeginBlock, error)

BeginBlocker application updates every begin block

func (*SimApp) Configurator 

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

Configurator returns the configurator for the app

func (*SimApp) DefaultGenesis 

func (app *SimApp) DefaultGenesis() map[string]json.RawMessage

DefaultGenesis returns a default genesis from the registered AppModuleBasic's.

func (*SimApp) EndBlocker 

func (app *SimApp) EndBlocker(ctx sdk.Context) (sdk.EndBlock, error)

EndBlocker application updates every end block

func (*SimApp) ExportAppStateAndValidators 

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

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

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) GetStoreKeys 

func (app *SimApp) GetStoreKeys() []storetypes.StoreKey

GetStoreKeys returns all the stored store keys.

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) InitChainer 

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

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) Name 

func (app *SimApp) Name() string

Name returns the name of the App

func (*SimApp) PreBlocker 

func (app *SimApp) PreBlocker(ctx sdk.Context, _ *abci.RequestFinalizeBlock) (*sdk.ResponsePreBlock, error)

PreBlocker application updates every pre block

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, cfg config.Config)

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

func (*SimApp) TxConfig 

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

TxConfig returns SimApp's TxConfig

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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