Connect a WebLN wallet¶

WebLNWallet connects your browser app to the user's WebLN wallet. It uses the same Wallet interface as Nostr Wallet Connect. The user needs a wallet extension or browser with WebLN support.

Connect¶

Check availability:

WebLNWallet wallet = new WebLNWallet();
wallet.isAvailable().then(available -> {
    System.out.println(available ? "Browser wallet found" : "No browser wallet");
    return null;
});

isAvailable() checks for a provider without requesting permissions. waitForReady() initializes the wallet connection and requests access, which may require approval in the wallet:

wallet.waitForReady().then(ready -> {
    System.out.println("Wallet ready: " + ready);
    return null;
}).catchException(error -> {
    System.err.println("Wallet connection failed: " + error);
});

Offer supported wallet actions¶

Check isMethodSupported(Wallet.Methods.payInvoice) or the relevant method before offering an action.

Wallet amounts use millisatoshis (1,000 millisatoshis = 1 satoshi). WebLN uses satoshis, so the adapter requires amounts that convert to whole satoshis.