btcpayserver/BTCPayServer/Views/UIStores/ImportWallet/Scan.cshtml

@model WalletSetupViewModel
@{
    Layout = "_LayoutWalletSetup";
    ViewData.SetActivePage(StoreNavPages.OnchainSettings, "Scan QR code", Context.GetStoreData().Id);
}

@section Navbar {
    <a asp-controller="UIStores" asp-action="ImportWallet" asp-route-storeId="@Model.StoreId" asp-route-cryptoCode="@Model.CryptoCode" asp-route-method="">
        <vc:icon symbol="back" />
    </a>
}

<header class="text-center">
    <h1>@ViewData["Title"]</h1>
    <p class="lead text-secondary mt-3">Scan the extended public key, also called "xpub", shown on your wallet's display.</p>
</header>

@if (!ViewContext.ModelState.IsValid)
{
    <div asp-validation-summary="All" class="text-danger"></div>
}

<div class="my-5">
    <partial name="CameraScanner"/>
    <form id="qr-import-form" method="post">
        <input asp-for="WalletFileContent" type="hidden" />
    </form>
</div>

<p class="mt-5">
    Generate a QR code of the extended public key in your wallet (see instructions for supported wallets below).
    Allow the browser access to your camera and hold the code to the camera when the scan prompt appears.
</p>

<table class="table table-hover">
    <thead>
    <tr>
        <th>Wallet</th>
        <th>Instructions</th>
    </tr>
    </thead>
    <tbody>
    <tr>
        <td>BlueWallet</td>
        <td>Open Wallet Settings ❯ Show Wallet XPUB</td>
    </tr>
    <tr>
        <td class="text-nowrap">Cobo Vault</td>
        <td>Open Wallet Settings ❯ Show/Export XPUB</td>
    </tr>
    <tr>
        <td class="text-nowrap">Keystone Vault</td>
        <td>Open Wallet Settings ❯ Show/Export XPUB</td>
    </tr>
    <tr>
        <td>Passport</td>
        <td>Pair Wallet ❯ BTCPay ❯ QR Code</td>
    </tr>
    <tr>
        <td>Specter DIY</td>
        <td>Master public keys ❯ Select key</td>
    </tr>
    <tr>
        <td>SeedSigner</td>
        <td>Seeds ❯ Select seed ❯ Export XPUB ❯ BlueWallet</td>
    </tr>
    </tbody>
</table>

@section PageHeadContent {
    <link href="~/vendor/vue-qrcode-reader/vue-qrcode-reader.css" rel="stylesheet" asp-append-version="true"/>
}

@section PageFootContent {
    <partial name="_ValidationScriptsPartial"/>
    <script src="~/vendor/vuejs/vue.min.js" asp-append-version="true"></script>
    <script src="~/vendor/vue-qrcode/vue-qrcode.min.js" asp-append-version="true"></script>
    <script src="~/vendor/ur-registry/urlib.min.js" asp-append-version="true"></script>
    <script src="~/vendor/vue-qrcode-reader/VueQrcodeReader.umd.min.js" asp-append-version="true"></script>

    <script>
        window.coinName = "@Model.Network.DisplayName.ToLowerInvariant()";
        document.addEventListener("DOMContentLoaded", function () {
            initCameraScanningApp("Scan wallet QR", data => {
                let xpub = "";
                if (typeof(data) === "object") {
                    if (data.type === "crypto-account") {
                        const account = window.URlib.CryptoAccount.fromCBOR(data.cbor);
                        const [descriptor] = account.getOutputDescriptors();
                        xpub = descriptor.getHDKey().getBip32Key();
                    } else {
                        console.error('Unexpected UR type', data.type)
                    }
                } else if (typeof(data) === 'string') {
                    xpub = data;
                }
                // remove potentially leading derivation path
                xpub = xpub.replace(/^\[.*?\]/, '');
                // submit
                document.getElementById("WalletFileContent").value = xpub;
                document.getElementById("qr-import-form").submit();
            });
        });
    </script>
}