Integrating ScratchCard Pro into Your App: Step-by-Step Guide

Introduction

ScratchCard Pro is a versatile SDK that adds interactive scratch-card experiences to mobile and web applications. Whether you want to run promotional campaigns, reward engagement, or gamify retention, ScratchCard Pro simplifies the UX and backend verification. This guide walks you through a complete integration flow: prerequisites, installation, client setup, server-side validation, analytics, testing, and go-live best practices. Examples cover iOS, Android, and cross-platform frameworks.

1. Prerequisites and planning

- Account and API keys: Sign up for a ScratchCard Pro developer account and obtain your public client key (for embedding) and private server key (for backend verification).

- Platform targets: Decide which platforms you’ll support (iOS, Android, Web, React Native, Flutter).

- UX design: Sketch where scratch cards appear (full-screen modal, in-feed card, post-purchase reward) and decide rules (win rates, reveal thresholds, multiple attempts).

- Security model: Plan server-side verification to avoid fraud. Never rely solely on client decisions to award prizes.

2. Installation

iOS (Swift, CocoaPods / SPM)

- CocoaPods: Add to Podfile

pod 'ScratchCardPro'

then run pod install.

- Swift Package Manager: Add repository URL in Xcode -> Swift Packages and select the latest release.

Android (Kotlin/Gradle)

- Add Maven repo and dependency:

implementation 'com.scratchcard:pro:1.2.3'

- Sync Gradle.

Web (npm)

- Install:

npm install scratchcard-pro --save

- Or use CDN script tag if preferred.

React Native / Flutter

- React Native: Install the package and run native linking steps (or use autolinking for RN 0.60+).

- Flutter: Add scratchcard_pro to pubspec.yaml and run flutter pub get. Follow platform-specific setup for iOS/Android.

3. Initialize the SDK

- Always initialize with your public client key. Example pseudo-code:

iOS (Swift)

let config = ScratchConfig(clientKey: "pk_live_XXXX", environment: .production)

ScratchCardPro.initialize(config: config)

Android (Kotlin)

ScratchCardPro.init(applicationContext, "pk_live_XXXX", Environment.PRODUCTION)

Web (JavaScript)

ScratchCardPro.init({ clientKey: 'pk_live_XXXX', environment: 'production' })

Use environment flags to switch between sandbox and production keys during development.

4. Displaying a scratch card

- Core components: overlay layer (scratchable surface), underlying prize view, progress tracking (percentage scratched), and reveal animation.

- Example flow:

1. Create a ScratchCard object with prize metadata (id, type, display text).

2. Present the ScratchCard view in your UI.

3. Listen for progress callbacks and for the “revealed” event when threshold (e.g., 70% scratched) is reached.

Sample usage (generic)

let card = ScratchCard(id: "promo_2026_05", prizeText: "Free Coffee")

card.onProgress = { percent in /* update UI */ }

card.onReveal = { result in /* call server to validate */ }

present(card.view)

5. Handling events and callbacks

- onProgress(percent): provide feedback, update progress bars or sound effects.

- onReveal(localResult): optional instant feedback, but do not finalize awarding without server validation.

- onError(error): handle missing assets, network failures, or license issues.

- onClose: cleanup and record metrics.

6. Server-side verification and awarding

- Security principle: verify prize eligibility and award transactions on your backend using the private server key. The client should send a verification request after a reveal including cardId, userId, obfuscated scratch data, and client-side signature if provided by the SDK.

- Example verification API (server):

Endpoint: POST https://api.your-backend.com/v1/scratch/verify

Body: { cardId, userId, clientSignature, scratchSnapshot }

On server:

1. Call ScratchCard Pro verify endpoint with your server key and client payload.

2. ScratchCard Pro returns a signed verification response (valid/invalid and prize details).

3. If valid, record awarding in your database, send notifications, and deduct inventory if needed.

- Always log transaction IDs and signatures for auditing and dispute resolution.

7. Reward delivery and inventory

- Atomic operations: when awarding limited prizes, use atomic DB operations or transactional inventory service to avoid overselling.

- Idempotency: ensure repeated verification calls with the same client payload don’t double-award. Use a unique nonce or transaction ID for idempotency keys.

- Fulfillment: deliver digital rewards instantly (credits, coupons) and trigger downstream processes for physical goods.

8. Analytics and A/B testing

- Track key events: card_shown, card_scratched_percent, card_revealed, verify_requested, verify_succeeded, prize_redeemed.

- Integrate with your analytics stack (Mixpanel, Firebase, Segment). Send events both from client (for UX metrics) and from server (for validation and conversion metrics).

- A/B testing: vary win rates, prize types, overlay designs, and thresholds. Use controlled experiments to optimize conversion and LTV.

9. Accessibility and UX best practices

- Provide an alternative for non-touch users and screen readers: a keyboard/voice option to “scratch” or reveal.

- Announce prize outcome via accessibility APIs (VoiceOver, TalkBack).

- Respect motion preferences: provide a non-animated reveal for users who prefer reduced motion.

10. Performance and asset management

- Lazy-load heavy assets (high-res overlays) only when card is shown.

- Use vector or low-size PNG assets where possible. Cache assets locally with proper expiry.

- Monitor memory usage on low-end devices. Dispose of scratch views after close.

11. Testing and QA

- Sandbox environment: use sandbox client and server keys to run full end-to-end tests without affecting production inventory.

- Manual tests: various gestures, partial scratch and re-open flows, network loss mid-scratch.

- Automated tests: unit tests for verification logic and integration tests for server endpoints.

- Fraud scenarios: simulate replayed requests, modified client payloads, and invalid signatures to ensure server rejects tampered data.

12. Release checklist

- Replace sandbox keys with production keys.

- Confirm HTTPS and certificate pinning if used.

- Verify the server validation logic uses the private key and rejects client-only decisions.

- Confirm analytics instrumentation and rate-limiting rules are in place.

- Prepare customer support flows and refund/appeal processes for prize disputes.

13. Troubleshooting common issues

- “Card doesn’t appear”: Check initialization order and that client key is valid for the environment.

- “Reveal event never fires”: Confirm progress threshold is set correctly and touch handlers are attached.

- “Server verification fails”: Verify your server is sending the right headers (Authorization: Bearer ) and payload format matches the SDK docs.

- “Duplicate awards”: Implement idempotency keys and atomic database writes.

Conclusion

Integrating ScratchCard Pro adds an engaging mechanic to your product that can boost retention and conversions if implemented securely and thoughtfully. The keys to success are: clear UX design, robust server-side verification, thorough testing, and sensible analytics. Follow the steps above to get started, then iterate on rewards, placement, and presentation based on real user behavior.

If you need platform-specific code snippets for your stack (SwiftUI sample, Kotlin Activity example, React Native component, or a Node.js server verification snippet), tell me which platform and I’ll provide focused examples.

Integrating ScratchCard Pro into Your App: Step-by-Step Guide Introduction ScratchCard Pro is a versatile SDK that adds interactive scratch-card experiences to mobile and web applications. Whether you want to run promotional campaigns, reward engagement, or gamify retention, ScratchCard Pro simplifies the UX and backend verification. This guide walks you through a complete integration flow: prerequisites, installation, client setup, server-side validation, analytics, testing, and go-live best practices. Examples cover iOS, Android, and cross-platform frameworks. 1. Prerequisites and planning - Account and API keys: Sign up for a ScratchCard Pro developer account and obtain your public client key (for embedding) and private server key (for backend verification). - Platform targets: Decide which platforms you’ll support (iOS, Android, Web, React Native, Flutter). - UX design: Sketch where scratch cards appear (full-screen modal, in-feed card, post-purchase reward) and decide rules (win rates, reveal thresholds, multiple attempts). - Security model: Plan server-side verification to avoid fraud. Never rely solely on client decisions to award prizes. 2. Installation iOS (Swift, CocoaPods / SPM) - CocoaPods: Add to Podfile pod 'ScratchCardPro' then run pod install. - Swift Package Manager: Add repository URL in Xcode -> Swift Packages and select the latest release. Android (Kotlin/Gradle) - Add Maven repo and dependency: implementation 'com.scratchcard:pro:1.2.3' - Sync Gradle. Web (npm) - Install: npm install scratchcard-pro --save - Or use CDN script tag if preferred. React Native / Flutter - React Native: Install the package and run native linking steps (or use autolinking for RN 0.60+). - Flutter: Add scratchcard_pro to pubspec.yaml and run flutter pub get. Follow platform-specific setup for iOS/Android. 3. Initialize the SDK - Always initialize with your public client key. Example pseudo-code: iOS (Swift) let config = ScratchConfig(clientKey: "pk_live_XXXX", environment: .production) ScratchCardPro.initialize(config: config) Android (Kotlin) ScratchCardPro.init(applicationContext, "pk_live_XXXX", Environment.PRODUCTION) Web (JavaScript) ScratchCardPro.init({ clientKey: 'pk_live_XXXX', environment: 'production' }) Use environment flags to switch between sandbox and production keys during development. 4. Displaying a scratch card - Core components: overlay layer (scratchable surface), underlying prize view, progress tracking (percentage scratched), and reveal animation. - Example flow: 1. Create a ScratchCard object with prize metadata (id, type, display text). 2. Present the ScratchCard view in your UI. 3. Listen for progress callbacks and for the “revealed” event when threshold (e.g., 70% scratched) is reached. Sample usage (generic) let card = ScratchCard(id: "promo_2026_05", prizeText: "Free Coffee") card.onProgress = { percent in /* update UI */ } card.onReveal = { result in /* call server to validate */ } present(card.view) 5. Handling events and callbacks - onProgress(percent): provide feedback, update progress bars or sound effects. - onReveal(localResult): optional instant feedback, but do not finalize awarding without server validation. - onError(error): handle missing assets, network failures, or license issues. - onClose: cleanup and record metrics. 6. Server-side verification and awarding - Security principle: verify prize eligibility and award transactions on your backend using the private server key. The client should send a verification request after a reveal including cardId, userId, obfuscated scratch data, and client-side signature if provided by the SDK. - Example verification API (server): Endpoint: POST https://api.your-backend.com/v1/scratch/verify Body: { cardId, userId, clientSignature, scratchSnapshot } On server: 1. Call ScratchCard Pro verify endpoint with your server key and client payload. 2. ScratchCard Pro returns a signed verification response (valid/invalid and prize details). 3. If valid, record awarding in your database, send notifications, and deduct inventory if needed. - Always log transaction IDs and signatures for auditing and dispute resolution. 7. Reward delivery and inventory - Atomic operations: when awarding limited prizes, use atomic DB operations or transactional inventory service to avoid overselling. - Idempotency: ensure repeated verification calls with the same client payload don’t double-award. Use a unique nonce or transaction ID for idempotency keys. - Fulfillment: deliver digital rewards instantly (credits, coupons) and trigger downstream processes for physical goods. 8. Analytics and A/B testing - Track key events: card_shown, card_scratched_percent, card_revealed, verify_requested, verify_succeeded, prize_redeemed. - Integrate with your analytics stack (Mixpanel, Firebase, Segment). Send events both from client (for UX metrics) and from server (for validation and conversion metrics). - A/B testing: vary win rates, prize types, overlay designs, and thresholds. Use controlled experiments to optimize conversion and LTV. 9. Accessibility and UX best practices - Provide an alternative for non-touch users and screen readers: a keyboard/voice option to “scratch” or reveal. - Announce prize outcome via accessibility APIs (VoiceOver, TalkBack). - Respect motion preferences: provide a non-animated reveal for users who prefer reduced motion. 10. Performance and asset management - Lazy-load heavy assets (high-res overlays) only when card is shown. - Use vector or low-size PNG assets where possible. Cache assets locally with proper expiry. - Monitor memory usage on low-end devices. Dispose of scratch views after close. 11. Testing and QA - Sandbox environment: use sandbox client and server keys to run full end-to-end tests without affecting production inventory. - Manual tests: various gestures, partial scratch and re-open flows, network loss mid-scratch. - Automated tests: unit tests for verification logic and integration tests for server endpoints. - Fraud scenarios: simulate replayed requests, modified client payloads, and invalid signatures to ensure server rejects tampered data. 12. Release checklist - Replace sandbox keys with production keys. - Confirm HTTPS and certificate pinning if used. - Verify the server validation logic uses the private key and rejects client-only decisions. - Confirm analytics instrumentation and rate-limiting rules are in place. - Prepare customer support flows and refund/appeal processes for prize disputes. 13. Troubleshooting common issues - “Card doesn’t appear”: Check initialization order and that client key is valid for the environment. - “Reveal event never fires”: Confirm progress threshold is set correctly and touch handlers are attached. - “Server verification fails”: Verify your server is sending the right headers (Authorization: Bearer ) and payload format matches the SDK docs. - “Duplicate awards”: Implement idempotency keys and atomic database writes. Conclusion Integrating ScratchCard Pro adds an engaging mechanic to your product that can boost retention and conversions if implemented securely and thoughtfully. The keys to success are: clear UX design, robust server-side verification, thorough testing, and sensible analytics. Follow the steps above to get started, then iterate on rewards, placement, and presentation based on real user behavior. If you need platform-specific code snippets for your stack (SwiftUI sample, Kotlin Activity example, React Native component, or a Node.js server verification snippet), tell me which platform and I’ll provide focused examples.

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