ic-use-actor
v0.1.0
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React Hook and context provider to make interacting with Internet Computer canisters more fun!
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ic-use-actor
A React context provider for managing Internet Computer (IC) actors with enhanced features like type safety and request/response interceptors. ic-use-actor
makes interacting with Internet Computer canisters more fun!
Features
- Shared Actor Context: Allows the same actor to be used across multiple components.
- Typescript Support: Makes full use of the canister service definitions to provide type safety for requests and responses.
- Interceptors:
onRequest
,onResponse
,onRequestError
, andonResponseError
callbacks allow for intercepting and processing requests and responses.
Table of Contents
Pre-requisites
ic-use-actor
needs an Internet Computer (IC) identity to work. The examples below uses ic-use-siwe-identity
as an identity provider. You can use any other identity provider as long as it returns a valid IC identity.
Installation
npm install ic-use-actor @dfinity/agent @dfinity/candid
Usage
To use ic-use-actor
in your React application, follow these steps:
1. Setting Up the Actor Context and Hook
First, create an actor context and a corresponding hook for each IC canister you would like to access. Export the hook to be able to use it in your components. The hook returned by createUseActorHook
can be named anything you want. If using ic-use-actor
with multiple canisters, you might want to name the hook after the canister to make it easier to identify which hook is for which canister - for example, useMyCanister
, useMyOtherCanister
, etc.
import {
createActorContext,
createUseActorHook,
} from "ic-use-actor";
import { _SERVICE } from "path-to/your-service.did";
const actorContext = createActorContext<_SERVICE>();
export const useActor = createUseActorHook<_SERVICE>(actorContext);
2. Creating an Actor Provider Component
Create one or more ActorProvider components to provide access to your canisters. ActorProviders can be nested to provide access to multiple canisters.
// Actors.tsx
import { ReactNode } from "react";
import {
ActorProvider,
createActorContext,
createUseActorHook,
} from "ic-use-actor";
import {
canisterId,
idlFactory,
} from "path-to/your-service/index";
import { _SERVICE } from "path-to/your-service.did";
import { useSiweIdentity } from "ic-use-siwe-identity";
const actorContext = createActorContext<_SERVICE>();
export const useActor = createUseActorHook<_SERVICE>(actorContext);
export default function Actors({ children }: { children: ReactNode }) {
const { identity } = useSiweIdentity();
return (
<ActorProvider<_SERVICE>
canisterId={canisterId}
context={actorContext}
identity={identity}
idlFactory={idlFactory}
>
{children}
</ActorProvider>
);
}
3. Wrapping Your Application
Wrap your application root component with the ActorProvider component(s) you created in the previous step to provide access to your canisters.
// App.tsx
import Actors from "./Actors";
function App() {
return (
<Actors>
<MyApplication />
</Actors>
);
}
4. Accessing the Actor in Components
In your components, use the useActor hook to access the actor:
// AnyComponent.tsx
import { useActor } from "path-to/useActor";
function AnyComponent() {
const { actor } = useActor();
// Use the actor for calling methods on your canister
React.useEffect(() => {
actor
.my_method()
.then((result) => {
// Do something with the result
})
.catch((error) => {
// Handle the error
});
}, []);
}
Advanced Usage
Setting up interceptors
Interceptors can be used to intercept requests and responses. You can use them to modify requests, log requests and responses, or perform other actions.
export default function Actor({ children }: { children: ReactNode }) {
const { identity } = useSiweIdentity();
const handleRequest = (data: InterceptorRequestData) => {
// Do something
// data: { args: unknown[], methodName: string }
return data.args;
};
const handleResponse = (data: InterceptorResponseData) => {
// Do something
// data: { args: unknown[], methodName: string, response: unknown }
return data.response;
};
const handleError = (data: InterceptorErrorData) => {
// Do something
// data: { args: unknown[], methodName: string, error: unknown }
return data.error;
};
return (
<ActorProvider<_SERVICE>
canisterId={canisterId}
context={actorContext}
identity={identity}
idlFactory={idlFactory}
onRequest={handleRequest}
onRequestError={handleError}
onResponse={handleResponse}
onResponseError={handleError}
>
{children}
</ActorProvider>
);
}
Updates
See the CHANGELOG for details on updates.
Author
- [email protected]
- Twitter: @kristoferlund
- Discord: kristoferkristofer
- Telegram: @kristoferkristofer
Contributing
Contributions are welcome. Please submit your pull requests or open issues to propose changes or report bugs.
License
This project is licensed under the MIT License. See the LICENSE file for more details.