interchainquery

package
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 Go to latest Published: Dec 3, 2022 License: Apache-2.0, Apache-2.0 Imports: 16 Imported by: 0

README

Interchain Query

Abstract

Stride uses interchain queries and interchain accounts to perform multichain liquid staking. The interchainquery module creates a framework that allows other modules to query other appchains using IBC. The interchainquery module is used to make bank balance ICQ queries to withdrawal account every N. The callback triggers ICA bank sends for 90% of the rewards to the delegation account and 10% to the stride hostzone revenue account. The ICA bank send logic is in x/stakeibc/keeper/callbacks.go.

Contents

  1. Concepts
  2. State
  3. Events
  4. Keeper
  5. Msgs

Concepts

Nearly all of Stride's functionality is built using interchain accounts (ICAs), which are a new functionality in Cosmos, and a critical component of IBC. ICAs allow accounts on Zone A to be controlled by Zone B. ICAs communicate with one another using Interchain Queries (ICQs), which involve Zone A querying Zone B for relevant information.

Two Zones communicate via a connection and channel. All communications between the Controller Zone (the chain that is querying) and the Host Zone (the chain that is being queried) is done through a dedicated IBC channel between the two chains, which is opened the first time the two chains interact.

For context, ICS standards define that each channel is associated with a particular connection, and a connection may have any number of associated channels.

State

The interchainquery module keeps Query objects and modifies the information from query to query, as defined in proto/interchainquery/v1/genesis.proto

InterchainQuery information type

Query has information types that pertain to the query itself. Query keeps the following:

  1. id keeps the query identification string.
  2. connection_id keeps the id of the channel or connection between the controller and host chain.
  3. chain_id keeps the id of the queried chain.
  4. query_type keeps the type of interchain query
  5. request keeps an bytecode encoded version of the interchain query
  6. period TODO
  7. last_height keeps the blockheight of the last block before the query was made
  8. callback_id keeps the function that will be called by the interchain query
  9. ttl TODO
  10. height keeps the height at which the ICQ query should execute on the host zone. This is often 0, meaning the query should execute at the latest height on the host zone.

DataPoint has information types that pertain to the data that is queried. DataPoint keeps the following:

  1. id keeps the identification string of the datapoint
  2. remote_height keeps the block height of the queried chain
  3. local_height keeps the block height of the querying chain
  4. value keeps the bytecode value of the data retrieved by the Query

Events

The interchainquery module emits an event at the end of every 3 stride_epochs (e.g. 15 minutes on local testnet).

The purpose of this event is to send interchainqueries that query data about staking rewards, which Stride uses to reinvest (aka autocompound) staking rewards.

			event := sdk.NewEvent(
				sdk.EventTypeMessage,
				sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
				sdk.NewAttribute(sdk.AttributeKeyAction, types.AttributeValueQuery),
				sdk.NewAttribute(types.AttributeKeyQueryId, queryInfo.Id),
				sdk.NewAttribute(types.AttributeKeyChainId, queryInfo.ChainId),
				sdk.NewAttribute(types.AttributeKeyConnectionId, queryInfo.ConnectionId),
				sdk.NewAttribute(types.AttributeKeyType, queryInfo.QueryType),
				// TODO: add height to request type
				sdk.NewAttribute(types.AttributeKeyHeight, "0"),
				sdk.NewAttribute(types.AttributeKeyRequest, hex.EncodeToString(queryInfo.Request)),
			)

Keeper

Keeper Functions

interchainquery/keeper/ module provides utility functions to manage ICQs

// GetQuery returns query
GetQuery(ctx sdk.Context, id string) (types.Query, bool)
// SetQuery set query info
SetQuery(ctx sdk.Context, query types.Query)
// DeleteQuery delete query info
DeleteQuery(ctx sdk.Context, id string)
// IterateQueries iterate through queries
IterateQueries(ctx sdk.Context, fn func(index int64, queryInfo types.Query) (stop bool))
// AllQueries returns every queryInfo in the store
AllQueries(ctx sdk.Context) []types.Query

Msgs

interchainquery has a Msg service that passes messages between chains.

service Msg {
  // SubmitQueryResponse defines a method for submiting query responses.
  rpc SubmitQueryResponse(MsgSubmitQueryResponse) returns (MsgSubmitQueryResponseResponse)
}

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ExportGenesis 

func ExportGenesis(ctx sdk.Context, k keeper.Keeper) *types.GenesisState

ExportGenesis returns the capability module's exported genesis.

func InitGenesis 

func InitGenesis(ctx sdk.Context, k keeper.Keeper, genState types.GenesisState)

InitGenesis initializes the capability module's state from a provided genesis state.

func NewHandler 

func NewHandler(k keeper.Keeper) sdk.Handler

NewHandler returns a handler for interchainquery module messages

Types

type AppModule 

type AppModule struct {
	AppModuleBasic
	// contains filtered or unexported fields
}

AppModule implements the AppModule interface for the capability module.

func NewAppModule 

func NewAppModule(cdc codec.Codec, keeper keeper.Keeper) AppModule

NewAppModule return a new AppModule

func (AppModule) BeginBlock 

func (am AppModule) BeginBlock(ctx sdk.Context, _ abci.RequestBeginBlock)

BeginBlock executes all ABCI BeginBlock logic respective to the capability module.

func (AppModule) ConsensusVersion 

func (AppModule) ConsensusVersion() uint64

ConsensusVersion implements AppModule/ConsensusVersion.

func (AppModule) EndBlock 

func (am AppModule) EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate

EndBlock executes all ABCI EndBlock logic respective to the capability module. It returns no validator updates.

func (AppModule) ExportGenesis 

func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage

ExportGenesis returns the capability module's exported genesis state as raw JSON bytes.

func (AppModule) GenerateGenesisState 

func (AppModule) GenerateGenesisState(simState *module.SimulationState)

GenerateGenesisState creates a randomized GenState of the pool-incentives module.

func (AppModule) InitGenesis 

func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, gs json.RawMessage) []abci.ValidatorUpdate

InitGenesis performs the capability module's genesis initialization It returns no validator updates.

func (AppModule) LegacyQuerierHandler 

func (am AppModule) LegacyQuerierHandler(legacyQuerierCdc *codec.LegacyAmino) sdk.Querier

LegacyQuerierHandler returns the capability module's Querier.

func (AppModule) Name 

func (am AppModule) Name() string

Name returns the capability module's name.

func (AppModule) ProposalContents 

func (AppModule) ProposalContents(simState module.SimulationState) []simtypes.WeightedProposalContent

ProposalContents doesn't return any content functions for governance proposals.

func (AppModule) QuerierRoute 

func (AppModule) QuerierRoute() string

QuerierRoute returns the capability module's query routing key.

func (AppModule) RandomizedParams 

func (AppModule) RandomizedParams(r *rand.Rand) []simtypes.ParamChange

RandomizedParams creates randomized pool-incentives param changes for the simulator.

func (AppModule) RegisterInvariants 

func (am AppModule) RegisterInvariants(_ sdk.InvariantRegistry)

RegisterInvariants registers the capability module's invariants.

func (AppModule) RegisterServices 

func (am AppModule) RegisterServices(cfg module.Configurator)

RegisterServices registers a GRPC query service to respond to the module-specific GRPC queries.

func (AppModule) RegisterStoreDecoder 

func (am AppModule) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry)

RegisterStoreDecoder registers a decoder for supply module's types

func (AppModule) Route 

func (am AppModule) Route() sdk.Route

Route returns the capability module's message routing key.

func (AppModule) WeightedOperations 

func (am AppModule) WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation

WeightedOperations returns the all the gov module operations with their respective weights.

type AppModuleBasic 

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

AppModuleBasic implements the AppModuleBasic interface for the capability module.

func NewAppModuleBasic 

func NewAppModuleBasic(cdc codec.Codec) AppModuleBasic

NewAppModuleBasic return a new AppModuleBasic

func (AppModuleBasic) DefaultGenesis 

func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage

DefaultGenesis returns the capability module's default genesis state.

func (AppModuleBasic) GetQueryCmd 

func (AppModuleBasic) GetQueryCmd() *cobra.Command

GetQueryCmd returns the capability module's root query command.

func (AppModuleBasic) GetTxCmd 

func (a AppModuleBasic) GetTxCmd() *cobra.Command

GetTxCmd returns the capability module's root tx command.

func (AppModuleBasic) Name 

func (AppModuleBasic) Name() string

Name returns the capability module's name.

func (AppModuleBasic) RegisterCodec 

func (AppModuleBasic) RegisterCodec(cdc *codec.LegacyAmino)

RegisterCodec registers a legacy amino codec

func (AppModuleBasic) RegisterGRPCGatewayRoutes 

func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux)

RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the module.

func (AppModuleBasic) RegisterInterfaces 

func (a AppModuleBasic) RegisterInterfaces(reg cdctypes.InterfaceRegistry)

RegisterInterfaces registers the module's interface types

func (AppModuleBasic) RegisterLegacyAminoCodec 

func (AppModuleBasic) RegisterLegacyAminoCodec(cdc *codec.LegacyAmino)

RegisterLegacyAminoCodec registers a legacy amino codec

func (AppModuleBasic) RegisterRESTRoutes 

func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Router)

RegisterRESTRoutes registers the capability module's REST service handlers.

func (AppModuleBasic) ValidateGenesis 

func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, config client.TxEncodingConfig, bz json.RawMessage) error

ValidateGenesis performs genesis state validation for the capability module.

Source Files

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Directories

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