evidence

Documentation

Overview

Package evidence implements a Cosmos SDK module, per ADR 009, that allows for the submission and handling of arbitrary evidence of misbehavior.

All concrete evidence types must implement the Evidence interface contract. Submitted evidence is first routed through the evidence module's Router in which it attempts to find a corresponding Handler for that specific evidence type. Each evidence type must have a Handler registered with the evidence module's keeper in order for it to be successfully executed.

Each corresponding handler must also fulfill the Handler interface contract. The Handler for a given Evidence type can perform any arbitrary state transitions such as slashing, jailing, and tombstoning. This provides developers with great flexibility in designing evidence handling.

A full setup of the evidence module may look something as follows:

ModuleBasics = module.NewBasicManager(
  // ...,
  evidence.AppModuleBasic{},
)

// First, create the keeper's subspace for parameters and the keeper itself.
evidenceParamspace := app.ParamsKeeper.Subspace(evidence.ModuleName)
evidenceKeeper := evidence.NewKeeper(
  app.cdc, keys[evidence.StoreKey], evidenceParamspace, evidence.DefaultCodespace,
)

// Second, create the evidence Handler and register all desired routes.
evidenceRouter := evidence.NewRouter().
  AddRoute(evidenceRoute, evidenceHandler).
  AddRoute(..., ...)

evidenceKeeper.SetRouter(evidenceRouter)

app.mm = module.NewManager(
  // ...
  evidence.NewAppModule(evidenceKeeper),
)

// Remaining application bootstrapping...

Index

• func BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock, k keeper.Keeper)
• func ExportGenesis(ctx sdk.Context, k keeper.Keeper) types.GenesisState
• func InitGenesis(ctx sdk.Context, k keeper.Keeper, gs types.GenesisState)
• func NewHandler(k keeper.Keeper) sdk.Handler
• type AppModule
  • func NewAppModule(keeper keeper.Keeper) AppModule
  • func (am AppModule) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock)
  • func (am AppModule) EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate
  • func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONMarshaler) json.RawMessage
  • func (AppModule) GenerateGenesisState(simState *module.SimulationState)
  • func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONMarshaler, bz json.RawMessage) []abci.ValidatorUpdate
  • func (am AppModule) LegacyQuerierHandler(codec.JSONMarshaler) sdk.Querier
  • func (am AppModule) Name() string
  • func (am AppModule) ProposalContents(simState module.SimulationState) []simtypes.WeightedProposalContent
  • func (AppModule) QuerierRoute() string
  • func (AppModule) RandomizedParams(r *rand.Rand) []simtypes.ParamChange
  • func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry)
  • func (am AppModule) RegisterQueryService(grpc.Server)
  • func (am AppModule) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry)
  • func (am AppModule) Route() sdk.Route
  • func (am AppModule) WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation
• type AppModuleBasic
  • func NewAppModuleBasic(evidenceHandlers ...eviclient.EvidenceHandler) AppModuleBasic
  • func (AppModuleBasic) DefaultGenesis(cdc codec.JSONMarshaler) json.RawMessage
  • func (AppModuleBasic) GetQueryCmd() *cobra.Command
  • func (a AppModuleBasic) GetTxCmd() *cobra.Command
  • func (AppModuleBasic) Name() string
  • func (AppModuleBasic) RegisterCodec(cdc *codec.Codec)
  • func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry)
  • func (a AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Router)
  • func (AppModuleBasic) ValidateGenesis(cdc codec.JSONMarshaler, bz json.RawMessage) error

Functions

func BeginBlocker

func BeginBlocker(ctx sdk.Context, req abci.RequestBeginBlock, k keeper.Keeper)

BeginBlocker iterates through and handles any newly discovered evidence of misbehavior submitted by Tendermint. Currently, only equivocation is handled.

func ExportGenesis

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

ExportGenesis returns the evidence module's exported genesis.

func InitGenesis

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

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

func NewHandler

func NewHandler(k keeper.Keeper) sdk.Handler

Types

type AppModule

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

AppModule implements the AppModule interface for the evidence module.

func NewAppModule

func NewAppModule(keeper keeper.Keeper) AppModule

func (AppModule) BeginBlock

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

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

func (AppModule) EndBlock

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

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

func (AppModule) ExportGenesis

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

ExportGenesis returns the evidence 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 evidence module.

func (AppModule) InitGenesis

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

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

func (AppModule) LegacyQuerierHandler

func (am AppModule) LegacyQuerierHandler(codec.JSONMarshaler) sdk.Querier

LegacyQuerierHandler returns the evidence module's Querier.

func (AppModule) Name

func (am AppModule) Name() string

Name returns the evidence module's name.

func (AppModule) ProposalContents

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

ProposalContents returns all the evidence content functions used to simulate governance proposals.

func (AppModule) QuerierRoute

func (AppModule) QuerierRoute() string

QuerierRoute returns the evidence module's query routing key.

func (AppModule) RandomizedParams

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

RandomizedParams creates randomized evidence param changes for the simulator.

func (AppModule) RegisterInvariants

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

RegisterInvariants registers the evidence module's invariants.

func (AppModule) RegisterQueryService

func (am AppModule) RegisterQueryService(grpc.Server)

RegisterQueryService 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 evidence module's types

func (AppModule) Route

func (am AppModule) Route() sdk.Route

Route returns the evidence 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 evidence module.

func NewAppModuleBasic

func NewAppModuleBasic(evidenceHandlers ...eviclient.EvidenceHandler) AppModuleBasic

NewAppModuleBasic crates a AppModuleBasic without the codec.

func (AppModuleBasic) DefaultGenesis

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

DefaultGenesis returns the evidence module's default genesis state.

func (AppModuleBasic) GetQueryCmd

func (AppModuleBasic) GetQueryCmd() *cobra.Command

GetQueryCmd returns the evidence module's root query command.

func (AppModuleBasic) GetTxCmd

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

GetTxCmd returns the evidence module's root tx command.

func (AppModuleBasic) Name

func (AppModuleBasic) Name() string

Name returns the evidence module's name.

func (AppModuleBasic) RegisterCodec

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

RegisterCodec registers the evidence module's types to the provided codec.

func (AppModuleBasic) RegisterInterfaces

func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry)

func (AppModuleBasic) RegisterRESTRoutes

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

RegisterRESTRoutes registers the evidence module's REST service handlers.

func (AppModuleBasic) ValidateGenesis

func (AppModuleBasic) ValidateGenesis(cdc codec.JSONMarshaler, bz json.RawMessage) error

ValidateGenesis performs genesis state validation for the evidence module.