WebView

import android.webkit.PermissionRequest
import android.webkit.WebChromeClient
import android.webkit.WebView
import android.webkit.WebViewClient

fun loadVirtualAccountsSession(webView: WebView, sessionKey: String) {
    webView.settings.apply {
        javaScriptEnabled = true
        domStorageEnabled = true          // localStorage
        allowFileAccess = true
        mediaPlaybackRequiresUserGesture = false
    }

    // Persist cookies across sessions
    android.webkit.CookieManager.getInstance().setAcceptCookie(true)
    android.webkit.CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true)

    webView.webViewClient = WebViewClient()

    // Required to grant camera access for photo ID capture and selfie
    webView.webChromeClient = object : WebChromeClient() {
        override fun onPermissionRequest(request: PermissionRequest) {
            request.grant(request.resources)
        }
    }

    webView.loadUrl("https://va.meridianpay.com?sessionKey=$sessionKey")
}

import WebKit

class VirtualAccountsViewController: UIViewController, WKUIDelegate {

    var webView: WKWebView!

    override func loadView() {
        let config = WKWebViewConfiguration()
        config.allowsInlineMediaPlayback = true
        config.mediaTypesRequiringUserActionForPlayback = []

        // Enable camera access for photo ID capture and selfie
        config.preferences.javaScriptEnabled = true
        config.websiteDataStore = WKWebsiteDataStore.default() // persistent cookies & localStorage

        webView = WKWebView(frame: .zero, configuration: config)
        webView.uiDelegate = self
        view = webView
    }

    func loadSession(sessionKey: String) {
        let url = URL(string: "https://va.meridianpay.com?sessionKey=\(sessionKey)")!
        webView.load(URLRequest(url: url))
    }

    // Required to allow camera permission prompts inside the WebView
    func webView(_ webView: WKWebView,
                 requestMediaCapturePermissionFor origin: WKSecurityOrigin,
                 initiatedByFrame frame: WKFrameInfo,
                 type: WKMediaCaptureType,
                 decisionHandler: @escaping (WKPermissionDecision) -> Void) {
        decisionHandler(.grant)
    }
}