diff --git a/Package.swift b/Package.swift
index 8bfc77d..92775f3 100644
--- a/Package.swift
+++ b/Package.swift
@@ -10,13 +10,8 @@ let package = Package(
     products: [
         .library(name: "Ramp", targets: ["Ramp"])
     ],
-    dependencies: [
-        .package(name: "Passbase",
-                 url: "https://github.com/passbase/passbase-sp.git",
-                 from: "2.8.0"),
-    ],
     targets: [
-        .target(name: "Ramp", dependencies: ["Passbase"]),
+        .target(name: "Ramp"),
         .testTarget(name: "RampTests", dependencies: ["Ramp"])
     ]
 )
diff --git a/Ramp.podspec b/Ramp.podspec
index 53aa822..f06b77a 100644
--- a/Ramp.podspec
+++ b/Ramp.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
     spec.name = 'Ramp'
-    spec.version = '3.0.0'
+    spec.version = '4.0.0'
     spec.license = 'proprietary'
     spec.summary = 'Ramp SDK for iOS'
     spec.homepage = 'https://ramp.network/'
@@ -9,5 +9,4 @@ Pod::Spec.new do |spec|
     spec.ios.deployment_target  = '11.0'
     spec.source_files = 'Sources/Ramp/*.swift'
     spec.resource_bundles = { 'Ramp' => 'Sources/Ramp/Resources/*' }
-    spec.dependency 'Passbase', '~> 2.8'
 end
diff --git a/Sources/Ramp/Configuration.swift b/Sources/Ramp/Configuration.swift
index 83351d5..f218f35 100644
--- a/Sources/Ramp/Configuration.swift
+++ b/Sources/Ramp/Configuration.swift
@@ -21,6 +21,8 @@ public struct Configuration: Decodable {
     public var offrampAsset: String?
     public var offrampWebhookV3Url: String?
     public var selectedCountryCode: String?
+    public var sdkType: String { Constants.sdkType }
+    public var sdkVersion: String { Constants.sdkVersion }
     public var swapAmount: String?
     public var swapAsset: String?
     public var userAddress: String?
@@ -56,6 +58,8 @@ extension Configuration {
         urlComponents.appendQueryItem(name: "offrampAsset", value: offrampAsset)
         urlComponents.appendQueryItem(name: "offrampWebhookV3Url", value: offrampWebhookV3Url)
         urlComponents.appendQueryItem(name: "selectedCountryCode", value: selectedCountryCode)
+        urlComponents.appendQueryItem(name: "sdkType", value: sdkType)
+        urlComponents.appendQueryItem(name: "sdkVersion", value: sdkVersion)
         urlComponents.appendQueryItem(name: "swapAmount", value: swapAmount)
         urlComponents.appendQueryItem(name: "swapAsset", value: swapAsset)
         urlComponents.appendQueryItem(name: "userAddress", value: userAddress)
diff --git a/Sources/Ramp/Constants.swift b/Sources/Ramp/Constants.swift
index 34d695a..3311721 100644
--- a/Sources/Ramp/Constants.swift
+++ b/Sources/Ramp/Constants.swift
@@ -5,6 +5,8 @@ struct Constants {
     static let defaultUrl: String = "https://buy.ramp.network"
     static let scriptMessageHandlerName: String = "RampInstantMobile"
     static let sendCryptoVersion: Int = 1
+    static let sdkType: String = "IOS"
+    static let sdkVersion: String = "4.0.0"
     
     static func postMessageScript(_ message: String) -> String {
         return "window.postMessage(" + message + ");"
diff --git a/Sources/Ramp/IncomingEvent.swift b/Sources/Ramp/IncomingEvent.swift
index 1cb0726..895fb19 100644
--- a/Sources/Ramp/IncomingEvent.swift
+++ b/Sources/Ramp/IncomingEvent.swift
@@ -1,7 +1,6 @@
 import Foundation
 
 enum IncomingEvent {
-    case kycInit(KycInitPayload)
     case onrampPurchaseCreated(OnrampPurchaseCreatedPayload)
     case widgetClose(WidgetClosePayload)
     case sendCrypto(SendCryptoPayload)
@@ -19,11 +18,6 @@ extension IncomingEvent: DictionaryDecodable {
         
         switch type {
             
-        case EventTypes.kycInit:
-            guard let payload else { throw Error.missingPayload(type) }
-            let decoded: KycInitPayload = try decoder.decode(payload)
-            self = .kycInit(decoded)
-            
         case EventTypes.onrampPurchaseCreated:
             guard let payload else { throw Error.missingPayload(type) }
             let decoded: OnrampPurchaseCreatedPayload = try decoder.decode(payload)
@@ -60,7 +54,6 @@ extension IncomingEvent: DictionaryDecodable {
 
 extension IncomingEvent {
     struct EventTypes {
-        static let kycInit = "KYC_INIT"
         static let onrampPurchaseCreated = "PURCHASE_CREATED"
         static let widgetClose = "WIDGET_CLOSE"
         static let sendCrypto = "SEND_CRYPTO"
@@ -81,15 +74,6 @@ extension IncomingEvent {
 
 // MARK: - Payloads
 
-struct KycInitPayload: Decodable {
-    let email: String
-    let countryCode: String
-    let verificationId: Int
-    let provider: String
-    let apiKey: String
-    let metaData: String?
-}
-
 struct OnrampPurchaseCreatedPayload: Decodable {
     let apiUrl: URL
     let purchase: OnrampPurchase
diff --git a/Sources/Ramp/Localizable.swift b/Sources/Ramp/Localizable.swift
index 64bfa59..c2be3c1 100644
--- a/Sources/Ramp/Localizable.swift
+++ b/Sources/Ramp/Localizable.swift
@@ -1,8 +1,18 @@
 import Foundation
 
+// use
+// genstrings -o Sources/Ramp/Resources/en.lproj Sources/Ramp/*.swift
+// to regenerate Localizable.strings
+
 struct Localizable {
-    static var closeAlertTitle: String { NSLocalizedString("Do you really want to close Ramp?", comment: "Alert title for closing Ramp") }
-    static var closeAlertMessage: String { NSLocalizedString("You will loose all progress and will have to start over", comment: "Alert message for closing Ramp") }
+    static var closeAlertTitle: String {
+        NSLocalizedString("Do you really want to close Ramp?",
+                          comment: "Alert title for closing Ramp")
+    }
+    static var closeAlertMessage: String {
+        NSLocalizedString("You will loose all progress and will have to start over",
+                          comment: "Alert message for closing Ramp")
+    }
     static var yes: String { NSLocalizedString("Yes", comment: "Yes") }
     static var no: String { NSLocalizedString("No", comment: "No") }
 }
diff --git a/Sources/Ramp/Logger.swift b/Sources/Ramp/Logger.swift
new file mode 100644
index 0000000..9e2981b
--- /dev/null
+++ b/Sources/Ramp/Logger.swift
@@ -0,0 +1,15 @@
+import Foundation
+
+struct Logger {
+    static func debug(_ message: String) {
+        #if DEBUG
+        print("[debug]", message)
+        #endif
+    }
+    
+    static func error(_ error: Error) {
+        #if DEBUG
+        print("[error]", String(describing: error))
+        #endif
+    }
+}
diff --git a/Sources/Ramp/OnrampPurchase.swift b/Sources/Ramp/OnrampPurchase.swift
index 5f6d737..657e755 100644
--- a/Sources/Ramp/OnrampPurchase.swift
+++ b/Sources/Ramp/OnrampPurchase.swift
@@ -1,24 +1,24 @@
 import Foundation
 
 public struct OnrampPurchase: Codable {
-    public let id: String
-    public let endTime: String
+    public let appliedFee: Double
     public let asset: AssetInfo
-    public let receiverAddress: String
+    public let assetExchangeRate: Double
+    public let baseRampFee: Double
+    public let createdAt: String
     public let cryptoAmount: String
+    public let endTime: String?
+    public let escrowAddress: String?
+    public let escrowDetailsHash: String?
     public let fiatCurrency: String
     public let fiatValue: Double
-    public let assetExchangeRate: Double
-    public let baseRampFee: Double
+    public let finalTxHash: String?
+    public let id: String
     public let networkFee: Double
-    public let appliedFee: Double
     public let paymentMethodType: String
-    public let finalTxHash: String?
-    public let createdAt: String
-    public let updatedAt: String
+    public let receiverAddress: String
     public let status: String
-    public let escrowAddress: String?
-    public let escrowDetailsHash: String?
+    public let updatedAt: String
     
     public struct AssetInfo: Codable {
         public let address: String?
diff --git a/Sources/Ramp/OutgoingEvent.swift b/Sources/Ramp/OutgoingEvent.swift
index efc785a..5ee2e8f 100644
--- a/Sources/Ramp/OutgoingEvent.swift
+++ b/Sources/Ramp/OutgoingEvent.swift
@@ -1,11 +1,6 @@
 import Foundation
 
 enum OutgoingEvent {
-    case kycStarted(KycStartedPayload)
-    case kycSubmitted(KycSubmittedPayload)
-    case kycSuccess(KycSuccessPayload)
-    case kycAborted(KycAbortedPayload)
-    case kycError(KycErrorPayload)
     case backButtonPressed
     case sendCryptoResult(SendCryptoResultPayload)
 }
@@ -19,31 +14,6 @@ extension OutgoingEvent: MessageEventEncodable {
         
         switch self {
             
-        case .kycStarted(let payload):
-            type = EventType.kycStarted
-            version = nil
-            payloadData = try encoder.encode(payload)
-            
-        case .kycSubmitted(let payload):
-            type = EventType.kycSubmitted
-            version = nil
-            payloadData = try encoder.encode(payload)
-            
-        case .kycSuccess(let payload):
-            type = EventType.kycSuccess
-            version = nil
-            payloadData = try encoder.encode(payload)
-            
-        case .kycAborted(let payload):
-            type = EventType.kycAborted
-            version = nil
-            payloadData = try encoder.encode(payload)
-            
-        case .kycError(let payload):
-            type = EventType.kycError
-            version = nil
-            payloadData = try encoder.encode(payload)
-            
         case .backButtonPressed:
             type = EventType.backButtonPressed
             version = nil
@@ -83,11 +53,6 @@ extension OutgoingEvent: MessageEventEncodable {
 
 extension OutgoingEvent {
     struct EventType {
-        static let kycStarted = "KYC_STARTED"
-        static let kycSubmitted = "KYC_SUBMITTED"
-        static let kycSuccess = "KYC_SUCCESS"
-        static let kycAborted = "KYC_ABORTED"
-        static let kycError = "KYC_ERROR"
         static let backButtonPressed = "BACK_BUTTON_PRESSED"
         static let sendCryptoResult = "SEND_CRYPTO_RESULT"
     }
@@ -103,28 +68,6 @@ extension OutgoingEvent {
 
 // MARK: - Payloads
 
-struct KycStartedPayload: Encodable {
-    let verificationId: Int
-}
-
-struct KycSubmittedPayload: Encodable {
-    let verificationId: Int
-    let identityAccessKey: String
-}
-
-struct KycSuccessPayload: Encodable {
-    let verificationId: Int
-    let identityAccessKey: String
-}
-
-struct KycAbortedPayload: Encodable {
-    let verificationId: Int
-}
-
-struct KycErrorPayload: Encodable {
-    let verificationId: Int
-}
-
 public struct SendCryptoResultPayload: Encodable {
     let txHash: String?
     
diff --git a/Sources/Ramp/PassbaseError.swift b/Sources/Ramp/PassbaseError.swift
deleted file mode 100644
index 53759e4..0000000
--- a/Sources/Ramp/PassbaseError.swift
+++ /dev/null
@@ -1,6 +0,0 @@
-import Foundation
-
-enum PassbaseError: String {
-    case cancelledByUser = "CANCELLED_BY_USER"
-    case biometricAuthenticationFailed = "BIOMETRIC_AUTHENTICATION_FAILED"
-}
diff --git a/Sources/Ramp/RampDelegate.swift b/Sources/Ramp/RampDelegate.swift
index 6932fb1..f0247d8 100644
--- a/Sources/Ramp/RampDelegate.swift
+++ b/Sources/Ramp/RampDelegate.swift
@@ -1,8 +1,16 @@
 import Foundation
 
 public protocol RampDelegate: AnyObject {
-    func ramp(_ rampViewController: RampViewController, didCreateOnrampPurchase purchase: OnrampPurchase, _ purchaseViewToken: String, _ apiUrl: URL)
-    func ramp(_ rampViewController: RampViewController, didRequestSendCrypto payload: SendCryptoPayload, responseHandler: @escaping (SendCryptoResultPayload) -> Void)
-    func ramp(_ rampViewController: RampViewController, didCreateOfframpSale sale: OfframpSale, _ saleViewToken: String, _ apiUrl: URL)
+    func ramp(_ rampViewController: RampViewController,
+              didCreateOnrampPurchase purchase: OnrampPurchase,
+              _ purchaseViewToken: String,
+              _ apiUrl: URL)
+    func ramp(_ rampViewController: RampViewController,
+              didRequestSendCrypto payload: SendCryptoPayload,
+              responseHandler: @escaping (SendCryptoResultPayload) -> Void)
+    func ramp(_ rampViewController: RampViewController,
+              didCreateOfframpSale sale: OfframpSale,
+              _ saleViewToken: String,
+              _ apiUrl: URL)
     func rampDidClose(_ rampViewController: RampViewController)
 }
diff --git a/Sources/Ramp/RampViewController.swift b/Sources/Ramp/RampViewController.swift
index 41ea729..2d6532a 100644
--- a/Sources/Ramp/RampViewController.swift
+++ b/Sources/Ramp/RampViewController.swift
@@ -1,6 +1,5 @@
 import UIKit
 import WebKit
-import Passbase
 
 public final class RampViewController: UIViewController {
     private let url: URL
@@ -28,6 +27,7 @@ public final class RampViewController: UIViewController {
         self.stackView = stackView
         
         let configuration = WKWebViewConfiguration()
+        configuration.allowsInlineMediaPlayback = true
         let webView = WKWebView(frame: .zero, configuration: configuration)
         webView.scrollView.showsVerticalScrollIndicator = false
         webView.uiDelegate = self
@@ -39,6 +39,7 @@ public final class RampViewController: UIViewController {
         super.viewDidLoad()
         subscribeMessageHandler()
         setupSwipeBackGesture()
+        Logger.debug("Loading URL: \(url.absoluteString)")
         let request = URLRequest(url: url)
         webView.load(request)
     }
@@ -95,23 +96,31 @@ public final class RampViewController: UIViewController {
     }
     
     private func sendOutgoingEvent(_ event: OutgoingEvent) {
-        let message = try? event.messagePayload()
-        guard let message else { return }
+        let message: String
+        do {
+            message = try event.messagePayload()
+        } catch {
+            Logger.error(error)
+            return
+        }
         let script = Constants.postMessageScript(message)
         webView.evaluateJavaScript(script) { _, _ in }
     }
     
     private func handleIncomingEvent(_ event: IncomingEvent) {
         switch event {
-        case .kycInit(let payload): startPassbaseFlow(payload)
-        case .onrampPurchaseCreated(let payload): delegate?.ramp(self, didCreateOnrampPurchase: payload.purchase, payload.purchaseViewToken, payload.apiUrl)
-        case .widgetClose(let payload): handleCloseRampEvent(payload)
+        case .onrampPurchaseCreated(let payload): handleOnrampPurchaseCreatedEvent(payload)
+        case .widgetClose(let payload): handleWidgetCloseEvent(payload)
         case .sendCrypto(let payload): handleSendCryptoEvent(payload)
-        case .offrampSaleCreated(let payload): delegate?.ramp(self, didCreateOfframpSale: payload.sale, payload.saleViewToken, payload.apiUrl)
+        case .offrampSaleCreated(let payload): handleOfframpSaleCreatedEvent(payload)
         }
     }
     
-    private func handleCloseRampEvent(_ payload: WidgetClosePayload) {
+    private func handleOnrampPurchaseCreatedEvent(_ payload: OnrampPurchaseCreatedPayload) {
+        delegate?.ramp(self, didCreateOnrampPurchase: payload.purchase, payload.purchaseViewToken, payload.apiUrl)
+    }
+    
+    private func handleWidgetCloseEvent(_ payload: WidgetClosePayload) {
         if payload.showAlert { showCloseAlert() }
         else { closeRamp() }
     }
@@ -123,59 +132,8 @@ public final class RampViewController: UIViewController {
         }
     }
     
-    // MARK: Passbase actions
-    
-    private var verificationId: Int?
-    
-    private func startPassbaseFlow(_ payload: KycInitPayload) {
-        verificationId = payload.verificationId
-        
-        PassbaseSDK.initialize(publishableApiKey: payload.apiKey)
-        PassbaseSDK.prefillUserEmail = payload.email
-        PassbaseSDK.prefillCountry = payload.countryCode
-        PassbaseSDK.metaData = payload.metaData
-        PassbaseSDK.delegate = self
-        
-        DispatchQueue.main.async {
-            try? PassbaseSDK.startVerification(from: self)
-        }
-    }
-    
-    // MARK: Passbase outgoing events
-    
-    private func handlePassbaseStarted() {
-        guard let verificationId else { return }
-        let payload = KycStartedPayload(verificationId: verificationId)
-        let event: OutgoingEvent = .kycStarted(payload)
-        sendOutgoingEvent(event)
-    }
-    
-    private func handlePassbaseSubmitted(identityAccessKey: String) {
-        guard let verificationId else { return }
-        let payload = KycSubmittedPayload(verificationId: verificationId, identityAccessKey: identityAccessKey)
-        let event: OutgoingEvent = .kycSubmitted(payload)
-        sendOutgoingEvent(event)
-    }
-    
-    private func handlePassbaseSuccess(identityAccessKey: String) {
-        guard let verificationId else { return }
-        let payload = KycSuccessPayload(verificationId: verificationId, identityAccessKey: identityAccessKey)
-        let event: OutgoingEvent = .kycSuccess(payload)
-        sendOutgoingEvent(event)
-    }
-    
-    private func handlePassbaseAborted() {
-        guard let verificationId else { return }
-        let payload = KycAbortedPayload(verificationId: verificationId)
-        let event: OutgoingEvent = .kycAborted(payload)
-        sendOutgoingEvent(event)
-    }
-    
-    private func handlePassbaseError() {
-        guard let verificationId else { return }
-        let payload = KycErrorPayload(verificationId: verificationId)
-        let event: OutgoingEvent = .kycError(payload)
-        sendOutgoingEvent(event)
+    private func handleOfframpSaleCreatedEvent(_ payload: OfframpSaleCreatedPayload) {
+        delegate?.ramp(self, didCreateOfframpSale: payload.sale, payload.saleViewToken, payload.apiUrl)
     }
 }
 
@@ -193,49 +151,16 @@ extension RampViewController: WKUIDelegate {
     }
 }
 
-extension RampViewController {
-    public enum Error: Swift.Error {
-        case closeRampFailed
-        case serializeOutgoingEventFailed
-        case missingKycVerificationId
-        case unableToOpenUrl
-        case deserializeIncomingEventFailed
-        case messaveEventReceiveFailed
-        case unknownPassbaseError
-    }
-}
-
 extension RampViewController: ScriptMessageDelegate {
     func handler(_ scriptMessageHandler: ScriptMessageHandler, didReceiveMessage body: [String : Any]) {
-        let event = try? IncomingEvent(dictionary: body)
-        guard let event else { return }
-        handleIncomingEvent(event)
-    }
-}
-
-// MARK: - Passbase delegate
-
-/// Documentation: https://docs.passbase.com/ios#4-handling-verifications
-extension RampViewController: PassbaseDelegate {
-    public func onStart() {
-        handlePassbaseStarted()
-    }
-    
-    public func onSubmitted(identityAccessKey: String) {
-        handlePassbaseSubmitted(identityAccessKey: identityAccessKey)
-    }
-    
-    public func onFinish(identityAccessKey: String) {
-        handlePassbaseSuccess(identityAccessKey: identityAccessKey)
-    }
-    
-    public func onError(errorCode: String) {
-        let error = PassbaseError(rawValue: errorCode)
-        guard let error else { return }
-        switch error {
-        case .cancelledByUser: handlePassbaseAborted()
-        case .biometricAuthenticationFailed: handlePassbaseError()
+        let event: IncomingEvent
+        do {
+            event = try IncomingEvent(dictionary: body)
+        } catch {
+            Logger.error(error)
+            return
         }
+        handleIncomingEvent(event)
     }
 }
 
diff --git a/Sources/Ramp/Resources/en.lproj/Localizable.strings b/Sources/Ramp/Resources/en.lproj/Localizable.strings
index ac25000..34ad5e3 100644
Binary files a/Sources/Ramp/Resources/en.lproj/Localizable.strings and b/Sources/Ramp/Resources/en.lproj/Localizable.strings differ
diff --git a/Sources/Ramp/ScriptMessageHandler.swift b/Sources/Ramp/ScriptMessageHandler.swift
index 427b952..a067936 100644
--- a/Sources/Ramp/ScriptMessageHandler.swift
+++ b/Sources/Ramp/ScriptMessageHandler.swift
@@ -10,8 +10,11 @@ class ScriptMessageHandler: NSObject {
 
 extension ScriptMessageHandler: WKScriptMessageHandler {
     func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
-        let body = message.body as? [String: Any]
-        guard let body else { return }
+        guard let body = message.body as? [String: Any]
+        else {
+            Logger.debug("JS message has no body")
+            return
+        }
         delegate?.handler(self, didReceiveMessage: body)
     }
 }
diff --git a/Tests/RampTests/ConfigurationTests.swift b/Tests/RampTests/ConfigurationTests.swift
index 8b87ba7..9769cf5 100644
--- a/Tests/RampTests/ConfigurationTests.swift
+++ b/Tests/RampTests/ConfigurationTests.swift
@@ -4,7 +4,7 @@ import XCTest
 class ConfigurationTests: XCTestCase {
     
     struct Constants {
-        static let defaultUrl = "https://buy.ramp.network/?variant=sdk-mobile"
+        static let defaultUrl = "https://buy.ramp.network/?sdkType=IOS&sdkVersion=4.0.0&variant=sdk-mobile"
     }
     
     func testEmptyConfiguration() throws {
diff --git a/Tests/RampTests/OutgoingEventTests.swift b/Tests/RampTests/OutgoingEventTests.swift
index 202af2e..c39d40a 100644
--- a/Tests/RampTests/OutgoingEventTests.swift
+++ b/Tests/RampTests/OutgoingEventTests.swift
@@ -18,13 +18,4 @@ class OutgoingEventTests: XCTestCase {
         let template = #"{"type":"BACK_BUTTON_PRESSED"}"#
         XCTAssertEqual(message, template)
     }
-    
-    func testCorrectKycStarted() throws {
-        let verificationId = Int.random(in: 666...777)
-        let payload = KycStartedPayload(verificationId: verificationId)
-        let event = OutgoingEvent.kycStarted(payload)
-        let message = try event.messagePayload()
-        let template = #"{"payload":{"verificationId":"# + String(verificationId) + #"},"type":"KYC_STARTED"}"#
-        XCTAssertEqual(message, template)
-    }
 }