codec: Rename codec and marshaler interfaces (#9226)
* codec: Rename codec and marshaler interfaces, ref: 8413 * codec: remove BinaryBare * changelog update * Update comments and documentation * adding doc string comments * Update CHANGELOG.md Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * Update codec/codec.go Co-authored-by: Marko <marbar3778@yahoo.com> Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com> Co-authored-by: Marko <marbar3778@yahoo.com>
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co-authored by
Federico Kunze
Marko
Amaury
parent
c94e9eb1bb
commit
be4a965599
@@ -40,7 +40,7 @@ Let us go through the different parameters:
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- An expected `keeper` is a `keeper` external to a module that is required by the internal `keeper` of said module. External `keeper`s are listed in the internal `keeper`'s type definition as interfaces. These interfaces are themselves defined in a `types/expected_keepers.go` file within the module's folder. In this context, interfaces are used to reduce the number of dependencies, as well as to facilitate the maintenance of the module itself.
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- `storeKey`s grant access to the store(s) of the [multistore](../core/store.md) managed by the module. They should always remain unexposed to external modules.
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- A [codec `cdc`](../core/encoding.md), used to marshall and unmarshall struct to/from `[]byte`, that can be any of `codec.BinaryMarshaler`,`codec.JSONMarshaler` or `codec.Marshaler` based on your requirements. It can be either a proto or amino codec as long as they implement these interfaces.
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- A [codec `cdc`](../core/encoding.md), used to marshall and unmarshall struct to/from `[]byte`, that can be any of `codec.BinaryCodec`,`codec.JSONCodec` or `codec.Codec` based on your requirements. It can be either a proto or amino codec as long as they implement these interfaces.
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Of course, it is possible to define different types of internal `keeper`s for the same module (e.g. a read-only `keeper`). Each type of `keeper` comes with its own constructor function, which is called from the [application's constructor function](../basics/app-anatomy.md). This is where `keeper`s are instantiated, and where developers make sure to pass correct instances of modules' `keeper`s to other modules that require it.
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@@ -36,8 +36,8 @@ Let us go through the methods:
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- `Name()`: Returns the name of the module as a `string`.
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- `RegisterLegacyAminoCodec(*codec.LegacyAmino)`: Registers the `amino` codec for the module, which is used to marshal and unmarshal structs to/from `[]byte` in order to persist them in the module's `KVStore`.
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- `RegisterInterfaces(codectypes.InterfaceRegistry)`: Registers a module's interface types and their concrete implementations as `proto.Message`.
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- `DefaultGenesis(codec.JSONMarshaler)`: Returns a default [`GenesisState`](./genesis.md#genesisstate) for the module, marshalled to `json.RawMessage`. The default `GenesisState` need to be defined by the module developer and is primarily used for testing.
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- `ValidateGenesis(codec.JSONMarshaler, client.TxEncodingConfig, json.RawMessage)`: Used to validate the `GenesisState` defined by a module, given in its `json.RawMessage` form. It will usually unmarshall the `json` before running a custom [`ValidateGenesis`](./genesis.md#validategenesis) function defined by the module developer.
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- `DefaultGenesis(codec.JSONCodec)`: Returns a default [`GenesisState`](./genesis.md#genesisstate) for the module, marshalled to `json.RawMessage`. The default `GenesisState` need to be defined by the module developer and is primarily used for testing.
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- `ValidateGenesis(codec.JSONCodec, client.TxEncodingConfig, json.RawMessage)`: Used to validate the `GenesisState` defined by a module, given in its `json.RawMessage` form. It will usually unmarshall the `json` before running a custom [`ValidateGenesis`](./genesis.md#validategenesis) function defined by the module developer.
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- `RegisterRESTRoutes(client.Context, *mux.Router)`: Registers the REST routes for the module. These routes will be used to map REST request to the module in order to process them. See [../interfaces/rest.md] for more.
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- `RegisterGRPCGatewayRoutes(client.Context, *runtime.ServeMux)`: Registers gRPC routes for the module.
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- `GetTxCmd()`: Returns the root [`Tx` command](./module-interfaces.md#tx) for the module. The subcommands of this root command are used by end-users to generate new transactions containing [`message`s](./messages-and-queries.md#queries) defined in the module.
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@@ -53,10 +53,10 @@ The `AppModuleGenesis` interface is a simple embedding of the `AppModuleBasic` i
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Let us go through the two added methods:
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- `InitGenesis(sdk.Context, codec.JSONMarshaler, json.RawMessage)`: Initializes the subset of the state managed by the module. It is called at genesis (i.e. when the chain is first started).
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- `ExportGenesis(sdk.Context, codec.JSONMarshaler)`: Exports the latest subset of the state managed by the module to be used in a new genesis file. `ExportGenesis` is called for each module when a new chain is started from the state of an existing chain.
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- `InitGenesis(sdk.Context, codec.JSONCodec, json.RawMessage)`: Initializes the subset of the state managed by the module. It is called at genesis (i.e. when the chain is first started).
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- `ExportGenesis(sdk.Context, codec.JSONCodec)`: Exports the latest subset of the state managed by the module to be used in a new genesis file. `ExportGenesis` is called for each module when a new chain is started from the state of an existing chain.
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It does not have its own manager, and exists separately from [`AppModule`](#appmodule) only for modules that exist only to implement genesis functionalities, so that they can be managed without having to implement all of `AppModule`'s methods. If the module is not only used during genesis, `InitGenesis(sdk.Context, codec.JSONMarshaler, json.RawMessage)` and `ExportGenesis(sdk.Context, codec.JSONMarshaler)` will generally be defined as methods of the concrete type implementing hte `AppModule` interface.
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It does not have its own manager, and exists separately from [`AppModule`](#appmodule) only for modules that exist only to implement genesis functionalities, so that they can be managed without having to implement all of `AppModule`'s methods. If the module is not only used during genesis, `InitGenesis(sdk.Context, codec.JSONCodec, json.RawMessage)` and `ExportGenesis(sdk.Context, codec.JSONCodec)` will generally be defined as methods of the concrete type implementing hte `AppModule` interface.
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### `AppModule`
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@@ -114,8 +114,8 @@ It implements the following methods:
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- `NewBasicManager(modules ...AppModuleBasic)`: Constructor function. It takes a list of the application's `AppModuleBasic` and builds a new `BasicManager`. This function is generally called in the `init()` function of [`app.go`](../basics/app-anatomy.md#core-application-file) to quickly initialize the independent elements of the application's modules (click [here](https://github.com/cosmos/gaia/blob/master/app/app.go#L59-L74) to see an example).
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- `RegisterLegacyAminoCodec(cdc *codec.LegacyAmino)`: Registers the [`codec.LegacyAmino`s](../core/encoding.md#amino) of each of the application's `AppModuleBasic`. This function is usually called early on in the [application's construction](../basics/app-anatomy.md#constructor).
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- `RegisterInterfaces(registry codectypes.InterfaceRegistry)`: Registers interface types and implementations of each of the application's `AppModuleBasic`.
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- `DefaultGenesis(cdc codec.JSONMarshaler)`: Provides default genesis information for modules in the application by calling the [`DefaultGenesis(cdc codec.JSONMarshaler)`](./genesis.md#defaultgenesis) function of each module. It is used to construct a default genesis file for the application.
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- `ValidateGenesis(cdc codec.JSONMarshaler, txEncCfg client.TxEncodingConfig, genesis map[string]json.RawMessage)`: Validates the genesis information modules by calling the [`ValidateGenesis(codec.JSONMarshaler, client.TxEncodingConfig, json.RawMessage)`](./genesis.md#validategenesis) function of each module.
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- `DefaultGenesis(cdc codec.JSONCodec)`: Provides default genesis information for modules in the application by calling the [`DefaultGenesis(cdc codec.JSONCodec)`](./genesis.md#defaultgenesis) function of each module. It is used to construct a default genesis file for the application.
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- `ValidateGenesis(cdc codec.JSONCodec, txEncCfg client.TxEncodingConfig, genesis map[string]json.RawMessage)`: Validates the genesis information modules by calling the [`ValidateGenesis(codec.JSONCodec, client.TxEncodingConfig, json.RawMessage)`](./genesis.md#validategenesis) function of each module.
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- `RegisterRESTRoutes(ctx client.Context, rtr *mux.Router)`: Registers REST routes for modules by calling the [`RegisterRESTRoutes`](./module-interfaces.md#register-routes) function of each module. This function is usually called function from the `main.go` function of the [application's command-line interface](../interfaces/cli.md).
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- `RegisterGRPCGatewayRoutes(clientCtx client.Context, rtr *runtime.ServeMux)`: Registers gRPC routes for modules.
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- `AddTxCommands(rootTxCmd *cobra.Command)`: Adds modules' transaction commands to the application's [`rootTxCommand`](../interfaces/cli.md#transaction-commands). This function is usually called function from the `main.go` function of the [application's command-line interface](../interfaces/cli.md).
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@@ -137,8 +137,8 @@ The module manager is used throughout the application whenever an action on a co
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- `RegisterInvariants(ir sdk.InvariantRegistry)`: Registers the [invariants](./invariants.md) of each module.
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- `RegisterRoutes(router sdk.Router, queryRouter sdk.QueryRouter, legacyQuerierCdc *codec.LegacyAmino)`: Registers legacy [`Msg`](./messages-and-queries.md#messages) and [`querier`](./query-services.md#legacy-queriers) routes.
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- `RegisterServices(cfg Configurator)`: Registers all module services.
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- `InitGenesis(ctx sdk.Context, cdc codec.JSONMarshaler, genesisData map[string]json.RawMessage)`: Calls the [`InitGenesis`](./genesis.md#initgenesis) function of each module when the application is first started, in the order defined in `OrderInitGenesis`. Returns an `abci.ResponseInitChain` to the underlying consensus engine, which can contain validator updates.
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- `ExportGenesis(ctx sdk.Context, cdc codec.JSONMarshaler)`: Calls the [`ExportGenesis`](./genesis.md#exportgenesis) function of each module, in the order defined in `OrderExportGenesis`. The export constructs a genesis file from a previously existing state, and is mainly used when a hard-fork upgrade of the chain is required.
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- `InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, genesisData map[string]json.RawMessage)`: Calls the [`InitGenesis`](./genesis.md#initgenesis) function of each module when the application is first started, in the order defined in `OrderInitGenesis`. Returns an `abci.ResponseInitChain` to the underlying consensus engine, which can contain validator updates.
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- `ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec)`: Calls the [`ExportGenesis`](./genesis.md#exportgenesis) function of each module, in the order defined in `OrderExportGenesis`. The export constructs a genesis file from a previously existing state, and is mainly used when a hard-fork upgrade of the chain is required.
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- `BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock)`: At the beginning of each block, this function is called from [`BaseApp`](../core/baseapp.md#beginblock) and, in turn, calls the [`BeginBlock`](./beginblock-endblock.md) function of each module, in the order defined in `OrderBeginBlockers`. It creates a child [context](../core/context.md) with an event manager to aggregate [events](../core/events.md) emitted from all modules. The function returns an `abci.ResponseBeginBlock` which contains the aforementioned events.
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- `EndBlock(ctx sdk.Context, req abci.RequestEndBlock)`: At the end of each block, this function is called from [`BaseApp`](../core/baseapp.md#endblock) and, in turn, calls the [`EndBlock`](./beginblock-endblock.md) function of each module, in the order defined in `OrderEndBlockers`. It creates a child [context](../core/context.md) with an event manager to aggregate [events](../core/events.md) emitted from all modules. The function returns an `abci.ResponseEndBlock` which contains the aforementioned events, as well as validator set updates (if any).
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