In your game

SDK

The Yes SDK runs inside your game. Submit scores, show ads, trigger haptics, and spend platform coins — all from a single global yes object.

Getting Started

No installation needed

The SDK is automatically injected into your game when it runs on the Yes platform. Just use the global yes object.

Quick Start

// Submit a score (fire and forget)
if (typeof yes !== 'undefined') {
  yes.submitScore(score);
}


// Reward the player with an ad
const ad = await yes.showRewardedAd();
if (ad.rewarded) givePlayerCoins(100);


// Trigger haptic feedback
yes.haptic('success');

Local Development

When running outside the Yes platform (e.g., local development), the SDK operates in standalone mode and returns mock data. This lets you develop and test without being connected to the platform.

API Reference

Scores

Boost player retention

Leaderboards drive competition and keep players coming back. Games with score systems see significantly higher retention rates as players compete to climb the ranks.
yes.submitScore()#
yes.submitScore(score: number): void

Submit a score to the leaderboard. Just call it — no need to await.

Parameters
NameTypeDescription
scorenumberThe score to submit (must be a positive number)
Example
// Fire and forget — just call it
if (typeof yes !== 'undefined') {
  yes.submitScore(gameState.score);
}

Ads

Two ad formats

Rewarded ads are opt-in — the player chooses to watch in exchange for a reward. Interstitial ads play between natural moments (e.g., between levels) and are rate-limited by the SDK so players aren't overwhelmed.
yes.showRewardedAd()#
yes.showRewardedAd(): Promise<RewardedAdResult>

Display a rewarded video ad to the player. The player can earn rewards by watching the full ad.

Returns

Promise<RewardedAdResult>Object containing rewarded (boolean), and optionally errorCode and errorMessage if failed

Example
const result = await yes.showRewardedAd();


if (result.rewarded) {
  // Player completed the ad - give reward!
  player.coins += 100;
  showMessage('You earned 100 coins!');
} else {
  // Ad was skipped or failed
  if (result.errorCode === 'USER_DISMISSED') {
    showMessage('Watch the full ad to earn rewards');
  } else if (result.errorCode === 'NOT_LOADED') {
    showMessage('No ad available right now');
  }
}
yes.isRewardedAdReady()#
yes.isRewardedAdReady(): Promise<AdReadyStatus>

Check if a rewarded ad is available to show. Use this to conditionally display 'Watch Ad' buttons.

Returns

Promise<AdReadyStatus>Object containing ready (boolean)

Example
// Check before showing the "Watch Ad" button
const { ready } = await yes.isRewardedAdReady();


const watchAdButton = document.getElementById('watchAdBtn');
watchAdButton.style.display = ready ? 'block' : 'none';
yes.showInterstitialAd()#
yes.showInterstitialAd(): Promise<InterstitialAdResult>

Show an interstitial ad between natural game moments (e.g., between levels). Rate-limited by the SDK — if called too frequently, it resolves immediately without showing an ad. Times out after 60 seconds.

Returns

Promise<InterstitialAdResult>Object containing shown (boolean) indicating whether the ad was displayed

Example
// Between levels
async function onLevelComplete() {
  await yes.showInterstitialAd();
  loadNextLevel();
}
yes.isInterstitialAdReady()#
yes.isInterstitialAdReady(): Promise<AdReadyStatus>

Check if an interstitial ad is available and not rate-limited. Returns false if the cooldown period hasn't elapsed since the last interstitial.

Returns

Promise<AdReadyStatus>Object containing ready (boolean)

Example
const { ready } = await yes.isInterstitialAdReady();
if (ready) {
  await yes.showInterstitialAd();
}

Haptic

yes.haptic()#
yes.haptic(style?: HapticStyle): void

Trigger haptic feedback on the player's device. Fire-and-forget — no need to await. Falls back silently on devices without haptic support.

Parameters
NameTypeDescription
style?'light' | 'medium' | 'heavy' | 'success' | 'warning' | 'error' | 'selection'The haptic feedback style. Defaults to 'medium'
Example
yes.haptic();          // default medium tap
yes.haptic('success'); // positive feedback
yes.haptic('error');   // negative feedback

Coins

Platform-controlled pricing

Coin costs are defined by the platform using fixed tiers — your game never sets prices directly. This keeps the economy consistent across all games and ensures players always know what to expect.
yes.purchase()#
yes.purchase(tierId: PurchaseTierId, options?: PurchaseOptions): Promise<PurchaseResult>

Prompt the player to spend coins from their wallet. The platform shows a native confirmation modal with the tier cost and optional label. Always check result.success before granting in-game content.

Parameters
NameTypeDescription
tierId'tier_1' | 'tier_2' | 'tier_3' | 'tier_4'The coin tier to charge. Throws synchronously if the tier ID is invalid.
options.label?stringLabel shown in the confirmation modal (e.g. 'Unlock Level Pack'). Helps players understand what they're purchasing.
Returns

Promise<PurchaseResult>{ success, tierId?, coinsSpent? } on success — { success: false, reason } on failure. reason is 'cancelled' | 'insufficient_funds' | 'error'

Example
const result = await yes.purchase('tier_2', { label: 'Extra Lives' });


if (result.success) {
  // Coins deducted — grant the in-game item
  grantExtraLives();
} else if (result.reason === 'insufficient_funds') {
  showMessage('Not enough coins!');
} else if (result.reason === 'cancelled') {
  // Player tapped cancel — do nothing
}
Coin Tiers
Tier IDCoins
tier_150
tier_2150
tier_3500
tier_41000

Language

Match the app's language

Players set their language in the Yes app. Use getLanguage() to read it and localize your game's UI so everything feels native to them.
yes.getLanguage()#
yes.getLanguage(): string

Returns the app's current language code. Synchronous — no await needed. Use this at game init to set your UI language.

Returns

stringLanguage code: 'en' (English) or 'tr' (Turkish). Defaults to 'en' if not set.

Example
const lang = yes.getLanguage();


if (lang === 'tr') {
  setUILanguage('turkish');
} else {
  setUILanguage('english');
}

Full Example

A complete game.js that uses every SDK feature:

game.js
let player = null;
let score = 0;


// Initialize when SDK is ready
yes.onReady(async () => {
  player = await yes.getPlayer();
  document.getElementById('playerName').textContent = player.username;


  // Localize the UI to match the app's language
  const lang = yes.getLanguage();
  setUILanguage(lang); // 'en' or 'tr'
});


// Called when player completes a level
async function onLevelComplete(levelScore) {
  score += levelScore;


  // Submit score (fire and forget)
  yes.submitScore(score);
  yes.haptic('success');


  // Show an interstitial between levels
  await yes.showInterstitialAd();
  loadNextLevel();
}


// Rewarded ad for extra lives
async function watchAdForLife() {
  const result = await yes.showRewardedAd();
  if (result.rewarded) {
    player.lives++;
    showMessage('Extra life earned!');
  }
}


// In-game coin purchase
async function unlockLevelPack() {
  const result = await yes.purchase('tier_2', { label: 'Level Pack' });
  if (result.success) {
    grantLevelPack();
    yes.haptic('success');
  } else if (result.reason === 'insufficient_funds') {
    showMessage('Not enough coins!');
  }
}

Best Practices

Safety check

Guard against the SDK not being loaded, and always check ad results before granting rewards:

if (typeof yes !== 'undefined') {
  yes.submitScore(score);
}


const ad = await yes.showRewardedAd();
if (ad.rewarded) {
  giveReward();
}

Score submission timing

Submit scores at natural game moments — end of level, game over, or achievement completion. Avoid spamming submissions during gameplay.

Testing locally

The SDK returns mock data in standalone mode, so you can develop and test without uploading to Yes. All API calls resolve with sample responses.