@ucanto/client

@ucanto/client provides the tools necessary to create, sign, and send UCAN-based RPC invocations. It enables secure communication with UCAN-compliant services while ensuring proper authorization and delegation handling.

What It Provides

• UCAN Invocation Handling: Creates and signs capability invocations.
• Batch Invocation Support: Enables multiple invocations in a single request.
• Secure Communication: Ensures interactions are cryptographically signed and verified.

How It Fits with Other Modules

• @ucanto/core: Defines capability structures and execution logic.
• @ucanto/server: Processes invocations received from the client.
• @ucanto/interface: Provides shared types for request and response handling.
• @ucanto/principal: Manages cryptographic signing for invocations.
• @ucanto/transport: Handles encoding and sending of requests.

For an overview and detailed usage information, refer to the main ucanto README.

Installation

npm install @ucanto/client

Example Usage

import * as Client from '@ucanto/client';
import { ed25519 } from '@ucanto/principal';

const service = ed25519.Verifier.parse(process.env.SERVICE_ID);
const issuer = ed25519.Signer.parse(process.env.CLIENT_KEYPAIR);

const invocation = await Client.invoke({
  issuer,
  audience: service,
  capability: {
    can: 'file/read',
    with: 'file://example.txt'
  }
});

const response = await client.execute(invocation);
if (response.error) {
  console.error('Invocation failed:', response.error);
} else {
  console.log('Invocation succeeded:', response.result);
}

For more details, see the ucanto documentation.