@dcspark/adalib

Adalib

Cardano friendly API

Adalib implements a Connector interface that complies with WalletConnect's standards.

It attempts to closely emulate the CIP-30 standard within the connectors. A dapp developer can use these connectors to retrieve the enabled CIP-30 API, and benefit from the included typings this library provides.

You will need a Walletconnect Project ID to use this library. You can get one by signing up and registering a dapp at https://walletconnect.com/.

For an examples, see App.tsx and Home.tsx in example project in this repo.

For further docs, see docs.

API

• Connect Wallet:
  • Flint
  • WalletConnect
  • Injected Connector

Init

The init function needs to be called to prepare adalib to be able to call all the functions in its API.

import { 
  init, 
  cardanoMainnetWalletConnect,
  FlintConnector, 
  WalletConnectConnector 
} from 'adalib'

init(
  {
    // The different connector methodologies that will be used.
    // FlintConnector will interact with injected Flint Wallet using browser
    // extension, while WalletConnectConnector can be used to interact with all
    // wallets that support the WalletConnect protocol.
    connectors: [
      new FlintConnector(),
      new WalletConnectConnector({
        relayerRegion: 'wss://relay.walletconnect.com',
        metadata: {
          description: 'Test app for adalib',
          name: 'Test Adalib dApp',
          icons: ['https://avatars.githubusercontent.com/u/37784886'],
          url: 'http://localhost:3000'
        },
        autoconnect: true,
        qrcode: true
      })
    ],
    // Name of the connector to be used.
    // The connector needs to be registered in the connectors field above.
    // This can be switched later using `switchConnector` function.
    connectorName: WalletConnectConnector.connectorName(),
    // The name of the chain and network to use.
    // Here, `mainnet` refers to the cardano mainnet network.
    chosenChain: cardanoMainnetWalletConnect()
  },
  WALLETCONNECT_PROJECT_ID
)

Connect Wallet

The connect function can be used to connect a wallet to a dApp. The wallet chosen needs to be configured in the init function above.

With the WalletConnect connector, if the user closes the QR modal without scanning the QR code, the connect function will throw an error. It is important to catch this error and handle it appropriately to ensure your application does not hang.

import { connect, getActiveConnector } from 'adalib'

const address = await connect()

// OR

getActiveConnector()
      .enable()
      .then(api => {
        console.log('CIP-30 API Created', { api });
        // Store the enabled CIP-30 api in state and make subsequent calls to it
        setEnabledAPI(api);
      });

Watch Address

Instead of retrieving the address once on the connect function, one can globally watch address changes using the watchAddress API.

import { watchAddress, connect } from 'adalib'

watchAddress(address => {
  console.log({ address })
})

// calls `enable` on the active connector
connect()

Switch Connector

import { switchConnector, FlintConnector, connect } from 'adalib'

switchConnector(FlintConnector.connectorName)

const flintWalletAPI = await connect()

Note: Sometimes the connection will die and you will need to reconnect. The connectors have an isConnected(timeout) function that can be used to check if the connection is still alive. If it is not, you can call the connect function again. The timeout is in milliseconds. The default is 10,000ms.

The walletconnect connector will ping the connected wallet. If there is no response before the timeout, it will assume the connection is dead and will return false.

The injected connector will check the network ID. If there is no response before the timeout, it will assume the connection is dead and will return false.

import { getActiveConnector } from 'adalib'

const connector = getActiveConnector()
const isStillConnected = await connector.isConnected(1000)
if (!isStillConnected) {
  await connector.enable()
}

Example

Example app written in react, for testing in the adalib-example folder.