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606x 606x 606x 606x 7x 7x 7x 6x 6x 6x 6x 6x 1x 1x 1x 1x 499x 1x 1x 1x 1x 1x 101x 1x 7x 7x 7x 7x 7x 7x 7x 7x 7x 1x 7x 1x 1x 15x 17x 17x 17x 17x 17x 3x 14x 13x 13x 13x 13x 13x 13x 13x 2x 11x 11x 11x 11x 2x 9x 9x 4x 2x 2x 2x 9x 9x 9x 9x 1x 1x 15x 34x 34x 34x 34x 34x 2x 32x 32x 32x 32x 31x 1x 1x 30x 30x 9x 9x 5x 4x 2x 2x 3x 3x 21x 21x 27x 27x 27x 27x 27x 27x 27x 27x 11x 11x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 16x 16x 16x 14x 14x 14x 14x 14x 14x 14x 1x 13x 13x 2x 11x 11x 11x 11x 11x 3x 1x 1x 2x 2x 11x 11x 11x 1x 1x 15x 6x 6x 6x 6x 6x 6x 6x 6x 2x 4x 4x 4x 2x 2x 2x 1x 5x 2x 3x 2x 1x 1x 1x 1x 1x 1x 15x 5x 5x 5x 4x 4x 4x 3x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 15x 7x 7x 6x 6x 6x 6x 3x 3x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 15x 12x 12x 12x 11x 9x 9x 1x 1x 15x 5x 5x 5x 5x 5x 4x 1x 4x 4x 13x 4x 1x 1x 15x 4x 4x 4x 1x 3x 3x 2x 1x 1x 15x 16x 16x 16x 15x 7x 2x 5x 6x 5x 1x 1x 15x 13x 13x 12x 12x 11x 1x 10x 10x 10x 10x 10x 10x 1x 1x 15x 297x 297x 15x | /**
* Economy routes — daily rewards, gacha, gift sending, bean redemption, purchases.
*
* All operations use Firestore as the sole database.
*
* POST /api/economy/daily-reward → Claim daily login reward
* POST /api/economy/gacha → Pull gacha (1, 10, or 100)
* POST /api/economy/gift → Send gift from backpack
* POST /api/economy/gift-direct → Buy and send gift directly
* POST /api/economy/gift-batch → Send gifts to multiple recipients
* POST /api/economy/backpack-send → Send entire backpack
* POST /api/economy/redeem-beans → Redeem beans for coins
* POST /api/economy/purchase → Validate in-app purchase
* POST /api/economy/trial-claim → Claim Super Shy trial
* POST /api/economy/trial-activate → Activate Super Shy trial
* POST /api/economy/test-coins → Add test coins (dev)
* GET /api/economy/balance → Get coin/bean balance
* GET /api/economy/transactions → Get transaction history
* GET /api/users/:uniqueId/backpack → Get user's backpack
* GET /api/users/:uniqueId/gift-wall → Get user's gift wall
* GET /api/users/:uniqueId/gift-wall/:giftId/senders → Get gift wall senders
*/
const crypto = require('node:crypto');
const router = require('express').Router();
const { db, FieldValue } = require('../utils/firebase');
const { generateId, now, todayStr, yesterdayStr } = require('../utils/helpers');
const { requireAdmin, isLiveAdmin } = require('../middleware/auth');
const { requireSameCohort } = require('../middleware/sameCohort');
const { effectiveCohort, cohortFromClaim } = require('../utils/firebase-claims');
const { filterListByCohort } = require('../utils/cohort-filter');
const log = require('../utils/log');
const { verifyProductPurchase, verifySubscription } = require('../utils/playStore');
const { verifyApplePurchase } = require('../utils/appleStore');
const { SUBSCRIPTION_TIERS } = require('../utils/subscriptionTiers');
const { viewerIsBlocked, checkBlockRelationship } = require('../utils/block-check');
// ─── Constants ────────────────────────────────────────────────────
const DEFAULT_ECONOMY_CONFIG = {
beanConversionRate: 0.6,
beanRedeemBonusThreshold: 2000,
beanRedeemBonusMultiplier: 1.1,
pullCosts: { 1: 10, 10: 100, 100: 1000 },
broadcastSendThreshold: 0,
broadcastWinThreshold: 5000,
dropRateExponent: 1.5,
pitySoftStart: 80,
pityHardLimit: 120,
pitySoftMaxShift: 0.15,
pityHighValueThreshold: 5000,
dailyBase: 50,
milestoneRewards: { 7: 100, 14: 200, 30: 500, 60: 1000, 90: 2000 },
};
// ─── Helpers ──────────────────────────────────────────────────────
// In-memory cache for economy config (avoids re-reading Firestore on every request)
let cachedEconomyConfig = null;
let economyConfigCachedAt = 0;
const ECONOMY_CONFIG_TTL = 60_000; // 1 minute
async function loadEconomyConfig() {
const currentTime = Date.now();
if (cachedEconomyConfig && currentTime - economyConfigCachedAt < ECONOMY_CONFIG_TTL) {
return cachedEconomyConfig;
}
const snap = await db.doc('config/economy').get();
if (snap.exists) {
cachedEconomyConfig = { ...DEFAULT_ECONOMY_CONFIG, ...snap.data() };
} else {
// Doc doesn't exist — write defaults so the Android SDK can read it
await db.doc('config/economy').set(DEFAULT_ECONOMY_CONFIG);
cachedEconomyConfig = { ...DEFAULT_ECONOMY_CONFIG };
}
economyConfigCachedAt = currentTime;
return cachedEconomyConfig;
}
/**
* Helper to read a user field with camelCase (new) or snake_case (legacy) fallback.
*/
function userField(user, camel, snake) {
return user[camel] ?? user[snake] ?? null;
}
/**
* Add a broadcast entry and trim to last 50.
*/
async function addBroadcast(data) {
const broadcastId = generateId();
await db.doc(`broadcasts/${broadcastId}`).set({
id: broadcastId,
type: data.type,
senderName: data.senderName,
senderPhotoUrl: data.senderPhotoUrl || null,
recipientName: data.recipientName || '',
giftName: data.giftName,
giftIconUrl: data.giftIconUrl || '',
giftCoinValue: data.giftCoinValue,
quantity: data.quantity || 1,
timestamp: now(),
});
// Trim old broadcasts (keep last 50). Pre-fix used
// `offset(50).limit(100)` which charges Firestore reads for ALL
// 50 SKIPPED documents on every call — at high gift volume this
// burns the Spark free-tier 50K-reads/day quota fast (50 reads
// per broadcast × 1000 broadcasts/day = 50K reads just from
// trim alone).
//
// New strategy:
// 1. count() aggregate → ~1 billable read regardless of size
// 2. If count <= 50: skip the trim entirely (no extra cost)
// 3. If count > 50: read+delete only the OVERFLOW docs (typically 1)
//
// Steady-state cost per broadcast: 1 set + 1 count + 1 read + 1
// delete = 4 ops, down from 51+. Audit H5 (Phase 2A).
const countSnap = await db.collection('broadcasts').count().get();
const totalCount = countSnap.data().count;
const KEEP_LAST = 50;
if (totalCount <= KEEP_LAST) return;
const overflow = totalCount - KEEP_LAST;
const oldSnap = await db
.collection('broadcasts')
.orderBy('timestamp', 'asc')
.limit(overflow)
.get();
Iif (oldSnap.empty) return;
// Chunk deletes into batches of 500 (Firestore batch limit).
const docs = oldSnap.docs;
for (let i = 0; i < docs.length; i += 500) {
const batch = db.batch();
const chunk = docs.slice(i, i + 500);
for (const doc of chunk) {
batch.delete(doc.ref);
}
await batch.commit();
}
}
/**
* Write a gift to a user's gift wall (upsert receivedCount, update senders).
*
* Audit M6 (Phase 2A): receivedCount updates use FieldValue.increment
* for atomicity. Pre-fix used (read currentCount) → (write current+qty)
* which lost concurrent updates: two simultaneous gifts to the same
* recipient/giftId both read receivedCount=5, both wrote 6, true count
* was 7. Under a room burst-gift scenario this lost gift counts visibly
* (rankings, profile display).
*
* Sender list update is best-effort: it's NOT atomic against itself
* because senders is an array that needs in-place mutation (find + sort
* + trim). Two concurrent updates can each lose the OTHER's sender
* entry. This is documented as known partial-failure for the senders
* field — the receivedCount remains accurate, which is the
* primary-display value.
*/
async function updateGiftWall(recipientId, giftId, senderId, quantity, senderCohort) {
const wallRef = db.doc(`users/${recipientId}/giftWall/${giftId}`);
const wallSnap = await wallRef.get();
const wallDoc = wallSnap.exists ? wallSnap.data() : null;
const senders = wallDoc?.senders || [];
// Update or add sender (best-effort — see function header). PR 10:
// stamp the sender's cohort on the entry so the read path can apply
// the inner-list filter without a per-entry live lookup. Existing
// pre-PR-10 entries that lack `cohort` are also backfilled on next
// send — the legacy-fallback in cohort-filter.js handles the rest.
const existingSender = senders.find((s) => s.senderId === senderId);
if (existingSender) {
existingSender.sendCount = (existingSender.sendCount || 0) + quantity;
existingSender.lastSentAt = now();
Eif (senderCohort && !existingSender.cohort) {
existingSender.cohort = senderCohort;
}
} else {
const entry = { senderId, sendCount: quantity, lastSentAt: now() };
Eif (senderCohort) entry.cohort = senderCohort;
senders.push(entry);
}
// Sort senders by count descending, keep top 50
senders.sort((a, b) => (b.sendCount || 0) - (a.sendCount || 0));
const trimmedSenders = senders.slice(0, 50);
if (wallSnap.exists) {
// Atomic-increment for the count + overwrite for the senders.
// The senders update is read-modify-write so it's NOT race-safe
// against itself (documented above), but the count IS race-safe
// because increment is server-side atomic.
await wallRef.update({
giftId,
receivedCount: FieldValue.increment(quantity),
senders: trimmedSenders,
});
} else {
// Create path — set is fine here, count starts at quantity.
await wallRef.set({
giftId,
receivedCount: quantity,
senders: trimmedSenders,
});
}
}
/**
* Write a transaction record.
*/
async function writeTransaction(userId, txId, data) {
await db.doc(`users/${userId}/transactions/${txId}`).set({
id: txId,
...data,
timestamp: data.timestamp || now(),
});
}
/**
* Write a room gift message to Firestore.
*/
async function writeRoomGiftMessage(roomId, senderId, senderName, text, giftId, giftIconUrl) {
const msgId = generateId();
await db.doc(`rooms/${roomId}/messages/${msgId}`).set({
id: msgId,
roomId,
senderId,
senderName,
text,
type: 'GIFT',
giftId: giftId || null,
giftIconUrl: giftIconUrl || '',
createdAt: now(),
});
}
/**
* Incrementally update gift rankings when a gift is sent.
* Replaces the old hourly cron job with real-time updates.
*
* Audit M6 (Phase 2A): totalSent uses FieldValue.increment for atomic
* server-side increment. The rankings array still has the same partial-
* failure window as updateGiftWall.senders — read-modify-write under
* concurrent updates can drop entries — but the totalSent counter
* remains accurate.
*/
async function updateGiftRankings(recipientId, giftId, quantity, recipientCohort) {
try {
const rankRef = db.doc(`giftRankings/${giftId}`);
const rankSnap = await rankRef.get();
const rankDoc = rankSnap.exists ? rankSnap.data() : {};
const rankings = rankDoc.rankings || [];
// Find or add recipient in rankings. PR 10: stamp the recipient's
// cohort so the read path can filter cross-cohort entries without
// a per-entry live lookup. Pre-PR-10 entries lacking `cohort` are
// backfilled on next send; legacy-fallback in cohort-filter.js
// handles unrewritten rows.
const existing = rankings.find((r) => r.userId === recipientId);
if (existing) {
existing.count = (existing.count || 0) + quantity;
Eif (recipientCohort && !existing.cohort) {
existing.cohort = recipientCohort;
}
} else {
// Get recipient display info
const userSnap = await db.doc(`users/${recipientId}`).get();
const user = userSnap.exists ? userSnap.data() : {};
const entry = {
userId: recipientId,
count: quantity,
displayName: userField(user, 'displayName', 'display_name') || '',
profilePhotoUrl: userField(user, 'profilePhotoUrl', 'profile_photo_url') || '',
};
Eif (recipientCohort) entry.cohort = recipientCohort;
rankings.push(entry);
}
// Sort by count descending, keep top 100
rankings.sort((a, b) => (b.count || 0) - (a.count || 0));
const trimmed = rankings.slice(0, 100);
// Re-assign ranks
trimmed.forEach((r, i) => {
r.rank = i + 1;
});
if (rankSnap.exists) {
await rankRef.update({
rankings: trimmed,
totalSent: FieldValue.increment(quantity),
lastUpdated: now(),
});
} else {
await rankRef.set({
rankings: trimmed,
totalSent: quantity,
lastUpdated: now(),
});
}
} catch (err) {
log.error('economy', 'Failed to update gift rankings', { error: err.message });
}
}
// ─── Shared gift helpers ─────────────────────────────────────────
// (block-check helpers live in ../utils/block-check — imported above)
/** Compute daily reward from config and streak. */
function computeDailyReward(config, newStreak, isSuperShy) {
const milestoneRewards = config.milestoneRewards || {};
const rawReward = milestoneRewards[String(newStreak)];
const isMilestone = String(newStreak) in milestoneRewards;
if (rawReward && typeof rawReward === 'object' && rawReward.type === 'gift') {
return {
coinReward: 0,
giftReward: { giftId: rawReward.giftId, quantity: rawReward.quantity || 1 },
isMilestone,
};
}
let coinReward;
Iif (typeof rawReward === 'number') {
coinReward = rawReward;
} else if (rawReward?.amount) {
coinReward = rawReward.amount;
} else {
coinReward = config.dailyBase;
}
if (isSuperShy) coinReward = Math.ceil(coinReward * 1.1);
return { coinReward, giftReward: null, isMilestone };
}
// ─── Routes ───────────────────────────────────────────────────────
// ── Daily reward ──
router.post('/economy/daily-reward', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const config = await loadEconomyConfig();
const today = todayStr();
const yesterday = yesterdayStr();
// Atomic claim per audit H6 — wraps user-read + already-claimed
// check + user-update + backpack-merge in a Firestore transaction.
// Pattern matches PRs #485-#488. Sentinel errors caught after.
const userRef = db.doc(`users/${uniqueId}`);
const ERR_USER_NOT_FOUND = 'User not found';
const ERR_ALREADY_CLAIMED = 'Already claimed today';
let txResult;
try {
txResult = await db.runTransaction(async (t) => {
const userSnap = await t.get(userRef);
if (!userSnap.exists) {
throw new Error(ERR_USER_NOT_FOUND);
}
const user = userSnap.data();
const shyCoins = userField(user, 'shyCoins', 'shy_coins') || 0;
const isSuperShy = userField(user, 'isSuperShy', 'is_super_shy') || false;
const loginStreak = userField(user, 'loginStreak', 'login_streak') || 0;
const lastLoginDate = userField(user, 'lastLoginDate', 'last_login_date');
const lastLoginRewardDate = userField(
user,
'lastLoginRewardDate',
'last_login_reward_date',
);
if (lastLoginRewardDate === today) {
throw new Error(ERR_ALREADY_CLAIMED);
}
const newStreak = lastLoginDate === yesterday ? loginStreak + 1 : 1;
const reward = computeDailyReward(config, newStreak, isSuperShy);
const newBalance = shyCoins + reward.coinReward;
const userUpdates = {
loginStreak: newStreak,
lastLoginDate: today,
lastLoginRewardDate: today,
};
if (reward.coinReward > 0) userUpdates.shyCoins = newBalance;
t.update(userRef, userUpdates);
if (reward.giftReward) {
const bpRef = db.doc(`users/${uniqueId}/backpack/${reward.giftReward.giftId}`);
const bpSnap = await t.get(bpRef);
const currentQty = bpSnap.exists ? bpSnap.data().quantity || 0 : 0;
t.set(bpRef, {
giftId: reward.giftReward.giftId,
quantity: currentQty + reward.giftReward.quantity,
lastAcquired: now(),
});
}
return {
coinReward: reward.coinReward,
giftReward: reward.giftReward,
isMilestone: reward.isMilestone,
newBalance,
newStreak,
};
});
} catch (txErr) {
if (txErr.message === ERR_USER_NOT_FOUND) {
return res.status(404).json({ error: ERR_USER_NOT_FOUND });
}
Eif (txErr.message === ERR_ALREADY_CLAIMED) {
return res.status(409).json({ error: ERR_ALREADY_CLAIMED });
}
throw txErr;
}
const { coinReward, giftReward, isMilestone, newBalance, newStreak } = txResult;
// Transaction record
const txId = generateId();
const milestoneSuffix = isMilestone ? ' (milestone)' : '';
const details = giftReward
? `Day ${newStreak} (milestone) — ${giftReward.quantity}x ${giftReward.giftId}`
: `Day ${newStreak}${milestoneSuffix}`;
await writeTransaction(uniqueId, txId, {
type: 'DAILY_REWARD',
amount: giftReward ? giftReward.quantity : coinReward,
currency: giftReward ? 'GIFT' : 'COINS',
balanceAfter: newBalance,
details,
});
const result = { coinsAwarded: coinReward, newStreak, isMilestone, newBalance };
if (giftReward) {
result.giftId = giftReward.giftId;
result.giftQuantity = giftReward.quantity;
}
log.info('economy', 'Daily reward claimed', {
userId: uniqueId,
coinReward,
streak: newStreak,
});
res.json(result);
} catch (err) {
log.error('economy', 'POST /economy/daily-reward failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ─── Gacha helpers ───────────────────────────────────────────────
/** Apply hard or soft pity adjustments to weights. Returns true if hard pity was triggered. */
function applyPitySystem(weights, pity, config, winnableGifts, highValueThreshold) {
if (pity >= config.pityHardLimit) {
// Hard pity: zero out low-value gifts
for (let j = 0; j < winnableGifts.length; j++) {
if (winnableGifts[j].coinValue < highValueThreshold) weights[j] = 0;
}
if (weights.every((w) => w === 0)) {
// Guarantee the most expensive gift
let bestIdx = 0;
for (let j = 1; j < winnableGifts.length; j++) {
Eif (winnableGifts[j].coinValue > winnableGifts[bestIdx].coinValue) bestIdx = j;
}
for (let j = 0; j < weights.length; j++) weights[j] = j === bestIdx ? 1 : 0;
}
return true;
}
if (pity >= config.pitySoftStart) {
const progress = (pity - config.pitySoftStart) / (config.pityHardLimit - config.pitySoftStart);
const shift = config.pitySoftMaxShift * progress;
let lowTotal = 0,
highTotal = 0;
for (let j = 0; j < winnableGifts.length; j++) {
if (winnableGifts[j].coinValue >= highValueThreshold) highTotal += weights[j];
else lowTotal += weights[j];
}
if (lowTotal > 0 && highTotal > 0) {
const totalWeight = lowTotal + highTotal;
const shiftAmount = shift * totalWeight;
for (let j = 0; j < winnableGifts.length; j++) {
if (winnableGifts[j].coinValue >= highValueThreshold) {
weights[j] += shiftAmount * (weights[j] / highTotal);
} else {
weights[j] -= shiftAmount * (weights[j] / lowTotal);
Iif (weights[j] < 0) weights[j] = 0;
}
}
}
}
return false;
}
/** Apply luck-based weight adjustments (shift weight from cheapest to others). */
function applyLuckBoost(weights, luck, winnableGifts) {
const luckBoost = (luck / 100) * 0.05;
if (luckBoost <= 0) return;
const totalWeight = weights.reduce((s, w) => s + w, 0);
const shiftAmount = luckBoost * totalWeight;
const minValue = Math.min(...winnableGifts.map((g) => g.coinValue));
let cheapTotal = 0,
expensiveTotal = 0;
for (let j = 0; j < winnableGifts.length; j++) {
if (winnableGifts[j].coinValue === minValue) cheapTotal += weights[j];
else expensiveTotal += weights[j];
}
Iif (cheapTotal <= shiftAmount || expensiveTotal <= 0) return;
for (let j = 0; j < winnableGifts.length; j++) {
if (winnableGifts[j].coinValue === minValue) {
weights[j] -= shiftAmount * (weights[j] / cheapTotal);
} else {
weights[j] += shiftAmount * (weights[j] / expensiveTotal);
}
}
}
/** Roll a weighted random selection from the gift pool. Returns { gift, fallback }. */
function rollWeightedGift(weights, winnableGifts) {
const total = weights.reduce((s, w) => s + w, 0);
Iif (total <= 0) return { gift: winnableGifts[0], fallback: true };
const roll = (require('crypto').randomInt(1_000_000) / 1_000_000) * total;
let cumulative = 0,
selectedIndex = 0;
for (let j = 0; j < weights.length; j++) {
cumulative += weights[j];
if (roll <= cumulative) {
selectedIndex = j;
break;
}
}
return { gift: winnableGifts[selectedIndex], fallback: false };
}
// ── Gacha ──
router.post('/economy/gacha', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const pullCount = body?.pullCount;
const expectedCost = body?.expectedCost;
if (![1, 10, 100].includes(pullCount)) {
return res.status(400).json({ error: 'pullCount must be 1, 10, or 100' });
}
const config = await loadEconomyConfig();
const pullCosts = config.pullCosts || { 1: 10, 10: 100, 100: 1000 };
// Audit M3 (Phase 2A): drop the unnecessary `String(pullCount)`
// coercion. JS object keys are always strings under the hood
// (numeric literals like `{1: 10}` are stored as `{'1': 10}`),
// so `pullCosts[pullCount]` resolves identically to
// `pullCosts[String(pullCount)]`. The audit raised a theoretical
// "Firestore numeric-key" concern, but Firestore Admin SDK
// returns plain JS objects with string-only keys regardless of
// how the doc was originally written. Simpler is better.
const cost = pullCosts[pullCount];
Iif (!cost) return res.status(400).json({ error: 'Invalid pull count' });
// Price validation
if (expectedCost !== null && expectedCost !== undefined && expectedCost !== cost) {
return res.json({
priceChanged: true,
currentPullCosts: pullCosts,
gifts: [],
coinsSpent: 0,
newBalance: 0,
newPityCounter: 0,
newLuckScore: 0,
});
}
const userSnap = await db.doc(`users/${uniqueId}`).get();
if (!userSnap.exists) return res.status(404).json({ error: 'User not found' });
const user = userSnap.data();
const shyCoins = userField(user, 'shyCoins', 'shy_coins') || 0;
if (shyCoins < cost) return res.status(402).json({ error: 'Insufficient coins' });
// Load winnable gifts
const giftsSnap = await db
.collection('gifts')
.where('showOnWheel', '==', true)
.orderBy('order')
.limit(16)
.get();
const allGifts = giftsSnap.docs.map((d) => ({ id: d.id, ...d.data() }));
Iif (allGifts.length === 0) return res.status(500).json({ error: 'No winnable gifts' });
// Filter to gifts with coinValue > 0
const winnableGifts = allGifts.filter((g) => (g.coinValue || 0) > 0);
if (winnableGifts.length === 0) return res.status(500).json({ error: 'No winnable gifts' });
// Compute base weights
const exponent = config.dropRateExponent;
const baseWeights = winnableGifts.map((g) => 1 / Math.pow(g.coinValue, exponent));
let pity = userField(user, 'pityCounter', 'pity_counter') || 0;
let luck = userField(user, 'luckScore', 'luck_score') || 0;
const highValueThreshold = config.pityHighValueThreshold;
const results = [];
// Admin-guaranteed first pull
let guaranteedFirstPull = false;
const guaranteedGiftId = userField(
user,
'guaranteedNextPullGiftId',
'guaranteed_next_pull_gift_id',
);
if (guaranteedGiftId) {
const guaranteedGift = winnableGifts.find((g) => g.id === guaranteedGiftId);
if (guaranteedGift) {
results.push(guaranteedGift);
guaranteedFirstPull = true;
pity = guaranteedGift.coinValue >= highValueThreshold ? 0 : pity + 1;
}
}
for (let i = guaranteedFirstPull ? 1 : 0; i < pullCount; i++) {
const weights = [...baseWeights];
const hardPityTriggered = applyPitySystem(
weights,
pity,
config,
winnableGifts,
highValueThreshold,
);
applyLuckBoost(weights, luck, winnableGifts);
const { gift, fallback } = rollWeightedGift(weights, winnableGifts);
results.push(gift);
if (fallback || hardPityTriggered || gift.coinValue >= highValueThreshold) {
pity = hardPityTriggered || gift.coinValue >= highValueThreshold ? 0 : pity + 1;
} else {
pity = pity + 1;
}
}
if (pullCount === 100) luck = Math.min(100, luck + 2);
const newBalance = shyCoins - cost;
const timestamp = now();
// ── Aggregate duplicate gifts so each backpack doc is written once ──
const giftCounts = {};
for (const gift of results) {
giftCounts[gift.id] = (giftCounts[gift.id] || 0) + 1;
}
const uniqueGiftIds = Object.keys(giftCounts);
// Fetch existing backpack docs in parallel
const existingDocs = await Promise.all(
uniqueGiftIds.map(async (gid) => {
const snap = await db.doc(`users/${uniqueId}/backpack/${gid}`).get();
return snap.exists ? snap.data() : null;
}),
);
// Build batch writes for backpack + user update in one atomic operation
const batch = db.batch();
for (let i = 0; i < uniqueGiftIds.length; i++) {
const gid = uniqueGiftIds[i];
const gift = results.find((g) => g.id === gid);
const bpDoc = existingDocs[i];
const currentQty = bpDoc?.quantity || 0;
const expiresAt = gift.expiresAfterDays
? timestamp + gift.expiresAfterDays * 86400000
: bpDoc?.expiresAt || null;
batch.set(
db.doc(`users/${uniqueId}/backpack/${gid}`),
{
giftId: gid,
quantity: currentQty + giftCounts[gid],
lastAcquired: timestamp,
expiresAt,
giftName: gift.name,
coinValue: gift.coinValue,
iconUrl: gift.iconUrl || gift.icon_url || '',
},
{ merge: true },
);
}
// Include coin deduction in the same batch
batch.update(db.doc(`users/${uniqueId}`), {
shyCoins: newBalance,
pityCounter: pity,
luckScore: luck,
guaranteedNextPullGiftId: null,
});
// Execute atomically — all or nothing
await batch.commit();
// Transaction record (best-effort — coins already deducted)
try {
const gachaTxId = generateId();
await writeTransaction(uniqueId, gachaTxId, {
type: 'GACHA_PULL',
amount: -cost,
currency: 'COINS',
balanceAfter: newBalance,
pullCount,
details: results.map((g) => g.name).join(', '),
guaranteed: !!guaranteedFirstPull,
});
} catch (err) {
log.error('economy', 'Failed to write gacha transaction', { uniqueId, error: err.message });
}
// Broadcast qualifying wins (best-effort)
try {
const winThreshold = config.broadcastWinThreshold;
for (const gift of results) {
if (gift.coinValue >= winThreshold) {
await addBroadcast({
type: 'GACHA_WIN',
senderName: userField(user, 'displayName', 'display_name') || '',
senderPhotoUrl: userField(user, 'profilePhotoUrl', 'profile_photo_url'),
recipientName: '',
giftName: gift.name,
giftIconUrl: gift.iconUrl || gift.icon_url || '',
giftCoinValue: gift.coinValue,
});
break; // one broadcast per pull session
}
}
} catch (err) {
log.error('economy', 'Failed to broadcast gacha win', { uniqueId, error: err.message });
}
res.json({
gifts: results.map((g) => ({
giftId: g.id,
giftName: g.name,
coinValue: g.coinValue,
iconUrl: g.iconUrl || '',
})),
coinsSpent: cost,
newBalance,
newPityCounter: pity,
newLuckScore: luck,
currentPullCosts: pullCosts,
});
log.info('economy', `Gacha pull x${pullCount}`, { userId: uniqueId, cost, newBalance });
} catch (err) {
log.error('economy', 'POST /economy/gacha failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Send gift from backpack ──
router.post('/economy/gift', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const { recipientId, giftId } = body || {};
const quantity = Math.max(1, Math.min(9999, Number.parseInt(body?.quantity, 10) || 1));
if (!recipientId || !giftId)
return res.status(400).json({ error: 'recipientId and giftId required' });
if (giftId === 'super_shy_trial')
return res.status(400).json({ error: 'Trial items cannot be transferred' });
if (uniqueId === recipientId)
return res.status(400).json({ error: 'Cannot send gift to yourself' });
const [giftSnap, bpSnap, senderSnap, recipientSnap] = await Promise.all([
db.doc(`gifts/${giftId}`).get(),
db.doc(`users/${uniqueId}/backpack/${giftId}`).get(),
db.doc(`users/${uniqueId}`).get(),
db.doc(`users/${recipientId}`).get(),
]);
const gift = giftSnap.exists ? { id: giftSnap.id, ...giftSnap.data() } : null;
const bpItem = bpSnap.exists ? bpSnap.data() : null;
const sender = senderSnap.exists ? senderSnap.data() : null;
const recipient = recipientSnap.exists ? recipientSnap.data() : null;
if (!gift) return res.status(404).json({ error: 'Gift not found' });
if (!bpItem || (bpItem.quantity || 0) < quantity)
return res.status(402).json({ error: 'Insufficient items in backpack' });
if (await requireSameCohort(req, res, recipientId, () => recipient)) return;
// PR 10: snapshot cohorts for write-time stamping on rankings + wall.
// Sender cohort comes from the JWT claim (single source of truth used
// by the gate above); recipient cohort comes from their user doc.
const senderCohort = cohortFromClaim(req);
const recipientCohort = effectiveCohort(recipient);
const blockError = checkBlockRelationship(sender, recipient, uniqueId, recipientId);
if (blockError) {
log.warn('economy', 'Gift blocked: sender/recipient blocked', {
senderUniqueId: uniqueId,
recipientUniqueId: recipientId,
});
return res.status(403).json({ error: blockError });
}
const config = await loadEconomyConfig();
const coinValue = gift.coinValue || gift.coin_value || 0;
const beanReward = Math.floor(coinValue * config.beanConversionRate * quantity);
const senderCoins = userField(sender, 'shyCoins', 'shy_coins') || 0;
const recipientBeans = userField(recipient, 'shyBeans', 'shy_beans') || 0;
const timestamp = now();
// Decrement backpack atomically via transaction to prevent race conditions
const bpRef = db.doc(`users/${uniqueId}/backpack/${giftId}`);
await db.runTransaction(async (t) => {
const snap = await t.get(bpRef);
const qty = snap.exists ? snap.data().quantity || 0 : 0;
Iif (qty < quantity) throw new Error('Insufficient items in backpack');
const newQty = qty - quantity;
if (newQty <= 0) {
t.delete(bpRef);
} else {
t.update(bpRef, { quantity: newQty });
}
});
// Update recipient gift wall
await updateGiftWall(recipientId, giftId, uniqueId, quantity, senderCohort);
// Credit beans (atomic increment to avoid race conditions)
await db.doc(`users/${recipientId}`).update({ shyBeans: FieldValue.increment(beanReward) });
// Room message if sender is in a room
const currentRoomId = userField(sender, 'currentRoomId', 'current_room_id');
if (currentRoomId) {
const sName = userField(sender, 'displayName', 'display_name') || 'Someone';
const rName = userField(recipient, 'displayName', 'display_name') || 'Someone';
const qtyLabel = quantity > 1 ? `${quantity}x ` : '';
await writeRoomGiftMessage(
currentRoomId,
uniqueId,
sName,
`${sName} sent ${qtyLabel}${gift.name} to ${rName}`,
giftId,
gift.iconUrl || gift.icon_url || '',
);
// Update last gift event on room doc
await db.doc(`rooms/${currentRoomId}`).update({
lastGiftEvent: {
senderId: uniqueId,
senderName: sName,
recipientId,
recipientName: rName,
giftId,
giftName: gift.name,
coinValue,
quantity,
timestamp,
},
});
}
// Transaction records
const giftSentTxId = generateId();
const giftReceivedTxId = generateId();
await Promise.all([
writeTransaction(uniqueId, giftSentTxId, {
type: 'GIFT_SENT',
amount: -quantity,
currency: 'COINS',
balanceAfter: senderCoins,
giftId,
giftName: gift.name,
recipientId,
quantity,
timestamp,
}),
writeTransaction(recipientId, giftReceivedTxId, {
type: 'GIFT_RECEIVED',
amount: beanReward,
currency: 'BEANS',
balanceAfter: recipientBeans + beanReward,
giftId,
giftName: gift.name,
senderId: uniqueId,
quantity,
timestamp,
}),
]);
// Broadcast
if (coinValue >= config.broadcastSendThreshold) {
await addBroadcast({
type: 'GIFT_SEND',
senderName: userField(sender, 'displayName', 'display_name') || '',
senderPhotoUrl: null,
recipientName: userField(recipient, 'displayName', 'display_name') || '',
giftName: gift.name,
giftIconUrl: gift.iconUrl || gift.icon_url || '',
giftCoinValue: coinValue,
quantity,
});
}
// Update gift rankings incrementally
await updateGiftRankings(recipientId, giftId, quantity, recipientCohort);
res.json({ success: true, beanReward, giftName: gift.name, quantity });
} catch (err) {
log.error('economy', 'POST /economy/gift failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Send gift directly (buy + send) ──
router.post('/economy/gift-direct', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const { recipientId, giftId } = body || {};
const quantity = Math.max(1, Math.min(9999, Number.parseInt(body?.quantity, 10) || 1));
if (!recipientId || !giftId)
return res.status(400).json({ error: 'recipientId and giftId required' });
if (uniqueId === recipientId)
return res.status(400).json({ error: 'Cannot send gift to yourself' });
const [giftSnap, senderSnap, recipientSnap] = await Promise.all([
db.doc(`gifts/${giftId}`).get(),
db.doc(`users/${uniqueId}`).get(),
db.doc(`users/${recipientId}`).get(),
]);
const gift = giftSnap.exists ? { id: giftSnap.id, ...giftSnap.data() } : null;
const sender = senderSnap.exists ? senderSnap.data() : null;
const recipient = recipientSnap.exists ? recipientSnap.data() : null;
if (!gift) return res.status(404).json({ error: 'Gift not found' });
// UK OSA #17 PR 9 — cohort gate. Collapses missing-recipient and
// cross-cohort branches into a byte-identical 404 'Not found'.
if (await requireSameCohort(req, res, recipientId, () => recipient)) return;
// PR 10: snapshot cohorts for write-time stamping.
const senderCohort = cohortFromClaim(req);
const recipientCohort = effectiveCohort(recipient);
const blockError = checkBlockRelationship(sender, recipient, uniqueId, recipientId);
if (blockError) {
log.warn('economy', 'Gift blocked: sender/recipient blocked', {
senderUniqueId: uniqueId,
recipientUniqueId: recipientId,
});
return res.status(403).json({ error: blockError });
}
const coinValue = gift.coinValue || gift.coin_value || 0;
const totalCost = coinValue * quantity;
const config = await loadEconomyConfig();
const beanReward = Math.floor(coinValue * config.beanConversionRate * quantity);
const recipientBeans = userField(recipient, 'shyBeans', 'shy_beans') || 0;
const timestamp = now();
// Atomic coin deduction. Without the transaction, two concurrent
// gift-direct requests at the sender's exact balance both pass the
// pre-check and both call FieldValue.increment(-totalCost), pushing
// the balance below 0. The transaction reads `shyCoins` fresh and
// aborts on insufficient funds before decrementing — matches the
// pattern at /economy/gift-batch (line 1006-1011).
const senderRef = db.doc(`users/${uniqueId}`);
let newSenderCoins;
try {
newSenderCoins = await db.runTransaction(async (t) => {
const snap = await t.get(senderRef);
const coins = snap.exists ? userField(snap.data(), 'shyCoins', 'shy_coins') || 0 : 0;
if (coins < totalCost) throw new Error('Insufficient coins');
t.update(senderRef, { shyCoins: FieldValue.increment(-totalCost) });
return coins - totalCost;
});
} catch (txErr) {
Eif (txErr.message === 'Insufficient coins') {
return res.status(402).json({ error: 'Insufficient coins' });
}
throw txErr;
}
// Gift wall
await updateGiftWall(recipientId, giftId, uniqueId, quantity, senderCohort);
// Beans (atomic)
await db.doc(`users/${recipientId}`).update({ shyBeans: FieldValue.increment(beanReward) });
// Room message
const currentRoomId = userField(sender, 'currentRoomId', 'current_room_id');
if (currentRoomId) {
const sName = userField(sender, 'displayName', 'display_name') || 'Someone';
const rName = userField(recipient, 'displayName', 'display_name') || 'Someone';
const qtyLabel = quantity > 1 ? `${quantity}x ` : '';
await writeRoomGiftMessage(
currentRoomId,
uniqueId,
sName,
`${sName} sent ${qtyLabel}${gift.name} to ${rName}`,
giftId,
gift.iconUrl || gift.icon_url || '',
);
}
// Transactions
const directSentTxId = generateId();
const directReceivedTxId = generateId();
await Promise.all([
writeTransaction(uniqueId, directSentTxId, {
type: 'GIFT_SENT',
amount: -totalCost,
currency: 'COINS',
balanceAfter: newSenderCoins,
giftId,
giftName: gift.name,
recipientId,
quantity,
details: `Sent ${quantity > 1 ? quantity + 'x ' : ''}${gift.name} directly (${totalCost} coins)`,
timestamp,
}),
writeTransaction(recipientId, directReceivedTxId, {
type: 'GIFT_RECEIVED',
amount: beanReward,
currency: 'BEANS',
balanceAfter: recipientBeans + beanReward,
giftId,
giftName: gift.name,
senderId: uniqueId,
quantity,
timestamp,
}),
]);
if (coinValue >= config.broadcastSendThreshold) {
await addBroadcast({
type: 'GIFT_SEND',
senderName: userField(sender, 'displayName', 'display_name') || '',
recipientName: userField(recipient, 'displayName', 'display_name') || '',
giftName: gift.name,
giftIconUrl: gift.iconUrl || gift.icon_url || '',
giftCoinValue: coinValue,
quantity,
});
}
// Update gift rankings incrementally
await updateGiftRankings(recipientId, giftId, quantity, recipientCohort);
res.json({ success: true, beanReward, giftName: gift.name, coinsSpent: totalCost, quantity });
} catch (err) {
log.error('economy', 'POST /economy/gift-direct failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Send gifts to multiple recipients (batch) ──
router.post('/economy/gift-batch', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const { recipientIds, giftId, fromBackpack } = body || {};
const quantity = Math.max(1, Math.min(9999, Number.parseInt(body?.quantity, 10) || 1));
if (!recipientIds || !Array.isArray(recipientIds) || recipientIds.length === 0 || !giftId) {
return res.status(400).json({ error: 'recipientIds array and giftId required' });
}
if (giftId === 'super_shy_trial')
return res.status(400).json({ error: 'Trial items cannot be transferred' });
if (recipientIds.includes(uniqueId))
return res.status(400).json({ error: 'Cannot send gift to yourself' });
if (recipientIds.length > 50) return res.status(400).json({ error: 'Max 50 recipients' });
const giftSnap = await db.doc(`gifts/${giftId}`).get();
if (!giftSnap.exists) return res.status(404).json({ error: 'Gift not found' });
const gift = { id: giftSnap.id, ...giftSnap.data() };
const senderSnap = await db.doc(`users/${uniqueId}`).get();
if (!senderSnap.exists) return res.status(404).json({ error: 'Sender not found' });
const sender = senderSnap.data();
const coinValue = gift.coinValue || gift.coin_value || 0;
const totalQty = quantity * recipientIds.length;
const senderCoins = userField(sender, 'shyCoins', 'shy_coins') || 0;
let bpItem = null;
if (fromBackpack) {
const bpSnap = await db.doc(`users/${uniqueId}/backpack/${giftId}`).get();
bpItem = bpSnap.exists ? bpSnap.data() : null;
if (!bpItem || (bpItem.quantity || 0) < totalQty)
return res.status(402).json({ error: 'Insufficient items in backpack' });
} else {
const totalCost = coinValue * totalQty;
if (senderCoins < totalCost) return res.status(402).json({ error: 'Insufficient coins' });
}
const config = await loadEconomyConfig();
const timestamp = now();
// Debit sender and credit all recipients in a single transaction
// to prevent partial failure (sender debited but recipients not credited)
const bpRef = fromBackpack ? db.doc(`users/${uniqueId}/backpack/${giftId}`) : null;
const senderRef = db.doc(`users/${uniqueId}`);
const totalCost = coinValue * totalQty;
// Validate recipient docs exist before starting
const recipientSnaps = await Promise.all(recipientIds.map((id) => db.doc(`users/${id}`).get()));
const validRecipients = recipientIds.filter((_, i) => recipientSnaps[i].exists);
// PR 9 — existence-hiding: same body as the cross-cohort gate's
// 404 so the attacker can't distinguish "all recipients absent"
// from "at least one cross-cohort recipient".
if (validRecipients.length === 0) return res.status(404).json({ error: 'Not found' });
// UK OSA #17 PR 9 — cohort gate (per-recipient, whole-batch refusal
// on cross-cohort OR missing). We deliberately do NOT silently skip
// missing recipients here (unlike the block-check loop below): block
// is a user-controllable signal so leaking via 403 is acceptable,
// but cohort is an age-derived attribute OSA #17 specifically
// protects. Skipping missing would let an attacker use a known same-
// cohort "carrier" alongside a target to binary-test "target exists
// AND is cross-cohort" via the 200 vs 404 split. So: any non-
// deliverable recipient (cross-cohort OR missing) refuses the whole
// batch with a byte-identical 404 'Not found'.
for (let i = 0; i < recipientIds.length; i++) {
const recipientData = recipientSnaps[i].exists ? recipientSnaps[i].data() : null;
if (await requireSameCohort(req, res, recipientIds[i], () => recipientData)) return;
}
// PR 10: sender cohort is constant across the batch; recipient
// cohort varies and is computed per-iteration below. Same-cohort
// is already enforced for every recipient above, so in practice
// senderCohort === recipientCohort for every iteration — we still
// pass both explicitly so the stamping logic is straightforward.
const senderCohort = cohortFromClaim(req);
// Check block relationships — UK OSA requires blocking prevents ALL contact
for (let i = 0; i < recipientIds.length; i++) {
Iif (!recipientSnaps[i].exists) continue;
const recipientData = recipientSnaps[i].data();
const blockError = checkBlockRelationship(sender, recipientData, uniqueId, recipientIds[i]);
if (blockError) {
log.warn('economy', 'Gift blocked: sender/recipient blocked', {
senderUniqueId: uniqueId,
recipientUniqueId: recipientIds[i],
});
return res.status(403).json({ error: blockError });
}
}
// Atomic debit via transaction
await db.runTransaction(async (t) => {
if (fromBackpack) {
const snap = await t.get(bpRef);
const qty = snap.exists ? snap.data().quantity || 0 : 0;
Iif (qty < totalQty) throw new Error('Insufficient items in backpack');
const newQty = qty - totalQty;
if (newQty <= 0) {
t.delete(bpRef);
} else {
t.update(bpRef, { quantity: newQty });
}
} else {
const snap = await t.get(senderRef);
const coins = snap.exists ? userField(snap.data(), 'shyCoins', 'shy_coins') || 0 : 0;
Iif (coins < totalCost) throw new Error('Insufficient coins');
t.update(senderRef, { shyCoins: FieldValue.increment(-totalCost) });
}
});
// Credit recipients (idempotent operations — safe outside transaction)
for (let i = 0; i < recipientIds.length; i++) {
const recipientId = recipientIds[i];
Iif (!recipientSnaps[i].exists) continue;
const recipient = recipientSnaps[i].data();
const recipientBeans = userField(recipient, 'shyBeans', 'shy_beans') || 0;
const beanReward = Math.floor(coinValue * config.beanConversionRate * quantity);
const recipientCohort = effectiveCohort(recipient);
// Gift wall + beans (atomic) + transaction
await updateGiftWall(recipientId, giftId, uniqueId, quantity, senderCohort);
await updateGiftRankings(recipientId, giftId, quantity, recipientCohort);
await db.doc(`users/${recipientId}`).update({ shyBeans: FieldValue.increment(beanReward) });
const recipientTxId = generateId();
await writeTransaction(recipientId, recipientTxId, {
type: 'GIFT_RECEIVED',
amount: beanReward,
currency: 'BEANS',
balanceAfter: recipientBeans + beanReward,
giftId,
giftName: gift.name,
senderId: uniqueId,
quantity,
timestamp,
});
}
// Sender transaction
const source = fromBackpack ? 'backpack' : 'direct';
const batchSenderTxId = generateId();
await writeTransaction(uniqueId, batchSenderTxId, {
type: 'GIFT_SENT',
amount: fromBackpack ? 0 : -(coinValue * totalQty),
currency: 'COINS',
balanceAfter: fromBackpack ? senderCoins : senderCoins - coinValue * totalQty,
giftId,
giftName: gift.name,
quantity,
details: `Batch ${source}: ${totalQty}x ${gift.name} to ${recipientIds.length} users`,
timestamp,
});
// Room message
const currentRoomId = userField(sender, 'currentRoomId', 'current_room_id');
if (currentRoomId) {
const sName = userField(sender, 'displayName', 'display_name') || 'Someone';
await writeRoomGiftMessage(
currentRoomId,
uniqueId,
sName,
`${sName} sent ${totalQty}x ${gift.name} to ${recipientIds.length} people`,
giftId,
gift.iconUrl || gift.icon_url || '',
);
}
// Broadcast
Eif (coinValue >= config.broadcastSendThreshold) {
await addBroadcast({
type: 'GIFT_SEND',
senderName: userField(sender, 'displayName', 'display_name') || '',
recipientName: `${recipientIds.length} people`,
giftName: gift.name,
giftIconUrl: gift.iconUrl || gift.icon_url || '',
giftCoinValue: coinValue,
quantity: totalQty,
});
}
res.json({
success: true,
giftName: gift.name,
totalSent: totalQty,
recipientCount: recipientIds.length,
});
} catch (err) {
log.error('economy', 'POST /economy/gift-batch failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Send entire backpack ──
router.post('/economy/backpack-send', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const { recipientId } = body || {};
if (!recipientId) return res.status(400).json({ error: 'recipientId required' });
if (uniqueId === recipientId) return res.status(400).json({ error: 'Cannot send to yourself' });
const [senderSnap, recipientSnap] = await Promise.all([
db.doc(`users/${uniqueId}`).get(),
db.doc(`users/${recipientId}`).get(),
]);
const sender = senderSnap.exists ? senderSnap.data() : null;
const recipient = recipientSnap.exists ? recipientSnap.data() : null;
if (!sender) return res.status(404).json({ error: 'Sender not found' });
// UK OSA #17 PR 9 — cohort gate. Collapses missing-recipient and
// cross-cohort branches into a byte-identical 404 'Not found'.
if (await requireSameCohort(req, res, recipientId, () => recipient)) return;
// PR 10: snapshot cohorts for write-time stamping on each item.
const senderCohort = cohortFromClaim(req);
const recipientCohort = effectiveCohort(recipient);
const blockError = checkBlockRelationship(sender, recipient, uniqueId, recipientId);
if (blockError) {
log.warn('economy', 'Gift blocked: sender/recipient blocked', {
senderUniqueId: uniqueId,
recipientUniqueId: recipientId,
});
return res.status(403).json({ error: blockError });
}
// Get backpack items (excluding trial items)
const backpackSnap = await db.collection(`users/${uniqueId}/backpack`).get();
const backpackItems = backpackSnap.docs.map((d) => ({ id: d.id, ...d.data() }));
const sendableItems = backpackItems.filter(
(item) => item.giftId !== 'super_shy_trial' && (item.quantity || 0) > 0,
);
if (sendableItems.length === 0) return res.status(400).json({ error: 'Backpack is empty' });
// For each backpack item, we need gift metadata. If denormalized on the bp doc, use it.
// Otherwise, look up the gift.
const config = await loadEconomyConfig();
const timestamp = now();
let totalItemsSent = 0;
let totalBeanReward = 0;
for (const item of sendableItems) {
const qty = item.quantity || 0;
totalItemsSent += qty;
// Get coin value from backpack doc or gift catalog
let coinVal = item.coinValue;
if (coinVal === null || coinVal === undefined) {
const giftDocSnap = await db.doc(`gifts/${item.giftId}`).get();
coinVal = giftDocSnap.exists ? giftDocSnap.data().coinValue || 0 : 0;
}
const beanReward = Math.floor(coinVal * config.beanConversionRate * qty);
totalBeanReward += beanReward;
// Gift wall + rankings
await updateGiftWall(recipientId, item.giftId, uniqueId, qty, senderCohort);
await updateGiftRankings(recipientId, item.giftId, qty, recipientCohort);
}
// Atomic: bean credit + ALL backpack deletes in the same batch.
// Without this, a transient Firestore error between the bean
// credit (recipient already credited) and the backpack delete
// (sender's items still present) leaves a state where the
// sender can re-send their backpack and DOUBLE-CREDIT the
// recipient. Audit H8 (Phase 2A).
//
// Firestore batch limit is 500 ops. The bean update is 1 op;
// we have N delete ops. If N+1 > 500 we must split — but in
// that case we sacrifice atomicity and accept the original
// partial-failure surface. We pick the bean-credit batch to
// include the FIRST chunk of deletes so any single chunk
// failure leaves no partial state for chunk #1. Subsequent
// chunks remain best-effort.
const FIRESTORE_BATCH_LIMIT = 500;
const BATCH_FIRST_CHUNK_LIMIT = FIRESTORE_BATCH_LIMIT - 1; // reserve 1 for bean update
if (sendableItems.length <= BATCH_FIRST_CHUNK_LIMIT) {
// Common case: small backpack. Single atomic batch.
const batch = db.batch();
batch.update(db.doc(`users/${recipientId}`), {
shyBeans: FieldValue.increment(totalBeanReward),
});
for (const item of sendableItems) {
batch.delete(db.doc(`users/${uniqueId}/backpack/${item.giftId}`));
}
await batch.commit();
} else {
// Rare case: very large backpack > 499 distinct gift items.
// First batch contains the bean credit + first 499 deletes (all
// atomic — covers the credit-without-delete failure mode for
// the bulk of items). Remaining deletes follow in 500-op batches.
const firstChunk = sendableItems.slice(0, BATCH_FIRST_CHUNK_LIMIT);
const firstBatch = db.batch();
firstBatch.update(db.doc(`users/${recipientId}`), {
shyBeans: FieldValue.increment(totalBeanReward),
});
for (const item of firstChunk) {
firstBatch.delete(db.doc(`users/${uniqueId}/backpack/${item.giftId}`));
}
await firstBatch.commit();
for (let i = BATCH_FIRST_CHUNK_LIMIT; i < sendableItems.length; i += FIRESTORE_BATCH_LIMIT) {
const batch = db.batch();
const chunk = sendableItems.slice(i, i + FIRESTORE_BATCH_LIMIT);
for (const item of chunk) {
batch.delete(db.doc(`users/${uniqueId}/backpack/${item.giftId}`));
}
await batch.commit();
}
}
// Transactions
const senderCoins = userField(sender, 'shyCoins', 'shy_coins') || 0;
const recipientBeans = userField(recipient, 'shyBeans', 'shy_beans') || 0;
const bpSentTxId = generateId();
const bpReceivedTxId = generateId();
const senderName = userField(sender, 'displayName', 'display_name') || 'user';
const recipientName = userField(recipient, 'displayName', 'display_name') || 'user';
await Promise.all([
writeTransaction(uniqueId, bpSentTxId, {
type: 'BACKPACK_SENT',
amount: 0,
currency: 'ITEMS',
balanceAfter: senderCoins,
totalItemsSent,
details: `Sent entire backpack (${totalItemsSent} items) to ${recipientName}`,
timestamp,
}),
writeTransaction(recipientId, bpReceivedTxId, {
type: 'BACKPACK_RECEIVED',
amount: totalBeanReward,
currency: 'BEANS',
balanceAfter: recipientBeans + totalBeanReward,
totalItemsReceived: totalItemsSent,
details: `Received entire backpack (${totalItemsSent} items) from ${senderName}`,
timestamp,
}),
]);
// Room message
const currentRoomId = userField(sender, 'currentRoomId', 'current_room_id');
if (currentRoomId) {
await writeRoomGiftMessage(
currentRoomId,
uniqueId,
senderName,
`${senderName} sent their entire backpack (${totalItemsSent} items) to ${recipientName}`,
null,
'',
);
}
res.json({ success: true, totalItemsSent, totalBeanReward });
} catch (err) {
log.error('economy', 'POST /economy/backpack-send failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Redeem beans ──
router.post('/economy/redeem-beans', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const amount = body?.amount;
if (!amount || typeof amount !== 'number' || amount < 1) {
return res.status(400).json({ error: 'amount must be a positive number' });
}
const config = await loadEconomyConfig();
const hasBonus = amount >= config.beanRedeemBonusThreshold;
const coins = hasBonus ? Math.floor(amount * config.beanRedeemBonusMultiplier) : amount;
// Atomic bean→coin conversion. Without the transaction, two
// concurrent redeem requests at the user's exact bean balance
// both pass the `shyBeans < amount` check and both decrement,
// pushing balance below 0. Coins would also be over-credited.
// The transaction reads beans fresh inside the tx; aborts on
// insufficient; performs the swap atomically.
//
// Audit C2 (Phase 2A): /economy/redeem-beans race condition.
const userRef = db.doc(`users/${uniqueId}`);
let newBeans;
let newCoins;
try {
({ newBeans, newCoins } = await db.runTransaction(async (t) => {
const snap = await t.get(userRef);
if (!snap.exists) {
throw new Error('User not found');
}
const data = snap.data();
const beans = userField(data, 'shyBeans', 'shy_beans') || 0;
const coinsNow = userField(data, 'shyCoins', 'shy_coins') || 0;
if (beans < amount) {
throw new Error('Insufficient beans');
}
t.update(userRef, {
shyBeans: FieldValue.increment(-amount),
shyCoins: FieldValue.increment(coins),
});
return { newBeans: beans - amount, newCoins: coinsNow + coins };
}));
} catch (txErr) {
if (txErr.message === 'User not found') {
return res.status(404).json({ error: 'User not found' });
}
Eif (txErr.message === 'Insufficient beans') {
return res.status(402).json({ error: 'Insufficient beans' });
}
throw txErr;
}
const bonusPct = Math.round((config.beanRedeemBonusMultiplier - 1) * 100);
const redeemTxId = generateId();
await writeTransaction(uniqueId, redeemTxId, {
type: 'BEAN_REDEEM',
amount: coins,
currency: 'COINS',
balanceAfter: newCoins,
details: hasBonus
? `Redeemed ${amount} beans (${bonusPct}% bonus)`
: `Redeemed ${amount} beans`,
});
res.json({ coinsReceived: coins, newCoinBalance: newCoins, newBeanBalance: newBeans });
} catch (err) {
log.error('economy', 'POST /economy/redeem-beans failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Validate purchase ──
router.post('/economy/purchase', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const body = req.body;
const { productId, purchaseToken, isSubscription, platform } = body || {};
if (!productId || !purchaseToken)
return res.status(400).json({ error: 'productId and purchaseToken required' });
// Default to Google Play for backward-compat — every Android client
// historically omitted the field. iOS clients MUST send `platform: 'apple'`.
const purchasePlatform = platform === 'apple' ? 'apple' : 'google';
// Deterministic receipt doc ID derived from purchaseToken.
// SHA-256 collisions are infeasible; any two requests with the
// SAME token write to the SAME doc, making the receipt set
// idempotent at the storage layer. Combined with the inside-tx
// existence check below, this closes the replay race window
// that the previous where-query duplicate check could not.
//
// Audit C4 (Phase 2A): /economy/purchase replay race.
const receiptId = crypto.createHash('sha256').update(String(purchaseToken)).digest('hex');
const receiptRef = db.doc(`purchaseReceipts/${receiptId}`);
// Pre-flight (cheap fast-path on already-processed tokens).
// The authoritative duplicate check happens inside the
// transaction below — this just avoids paying the verification
// cost (network call to Google/Apple) for tokens we've already
// seen. A race between this check and the tx is fine: the tx
// will catch the duplicate and reject.
const existingSnap = await receiptRef.get();
if (existingSnap.exists) {
log.warn('economy', 'Duplicate purchase token rejected (pre-flight)', {
userId: uniqueId,
productId,
});
return res.status(409).json({ error: 'Purchase already processed' });
}
// Verify purchase with the appropriate store (Google Play or Apple App Store)
const packageName = 'com.shyden.shytalk';
let verification;
if (process.env.NODE_ENV === 'production') {
try {
if (purchasePlatform === 'apple') {
// iOS sends `Transaction.jwsRepresentation` as `purchaseToken`.
// verifyApplePurchase enforces bundleId, productId, revocation,
// and (for subs) expiry — see appleStore.js.
verification = await verifyApplePurchase(productId, purchaseToken, !!isSubscription);
} else if (isSubscription) {
verification = await verifySubscription(packageName, productId, purchaseToken);
} else {
verification = await verifyProductPurchase(packageName, productId, purchaseToken);
}
} catch (verifyErr) {
log.warn('economy', 'Purchase verification rejected', {
userId: uniqueId,
productId,
platform: purchasePlatform,
isSubscription: !!isSubscription,
error: verifyErr.message,
});
return res.status(403).json({ error: 'Purchase verification failed' });
}
} else {
log.warn('economy', 'Skipping purchase verification in non-production environment', {
userId: uniqueId,
productId,
platform: purchasePlatform,
isSubscription: !!isSubscription,
});
verification = { orderId: 'dev-unverified' };
}
const orderId = verification.orderId || verification.latestOrderId || null;
const timestamp = now();
const userRef = db.doc(`users/${uniqueId}`);
// Sentinels for tx-internal aborts. Caught after the tx and
// mapped to the appropriate HTTP status.
const ERR_DUPLICATE = 'Purchase already processed';
const ERR_UNKNOWN_SUB = 'Unknown subscription product';
const ERR_USER_NOT_FOUND = 'User not found';
const ERR_UNKNOWN_PKG = 'Unknown coin package';
if (isSubscription) {
const sub = SUBSCRIPTION_TIERS[productId];
if (!sub) return res.status(400).json({ error: ERR_UNKNOWN_SUB });
const expiry = sub.days ? timestamp + sub.days * 86400000 : null;
// Atomic: re-check receipt + write receipt + grant subscription.
// Firestore transactions retry on contention; a concurrent
// request that wins the race will populate the receipt before
// this tx's t.get() sees it, causing this attempt to abort
// with ERR_DUPLICATE on retry.
try {
await db.runTransaction(async (t) => {
const rcptSnap = await t.get(receiptRef);
Iif (rcptSnap.exists) {
throw new Error(ERR_DUPLICATE);
}
// Persist tier + days for refund-time reversal (see
// pre-fix comment): refund reads from receipt rather
// than re-deriving from mutable SUBSCRIPTION_TIERS map.
t.set(receiptRef, {
userId: uniqueId,
productId,
purchaseToken,
platform: purchasePlatform,
isSubscription: true,
createdAt: timestamp,
verified: true,
orderId,
tierGranted: sub.tier,
daysGranted: sub.days,
});
t.update(userRef, {
isSuperShy: true,
superShyExpiry: expiry,
superShyTier: sub.tier,
});
});
} catch (txErr) {
if (txErr.message === ERR_DUPLICATE) {
log.warn('economy', 'Duplicate purchase rejected (tx)', {
userId: uniqueId,
productId,
});
return res.status(409).json({ error: ERR_DUPLICATE });
}
throw txErr;
}
const subTxId = generateId();
await writeTransaction(uniqueId, subTxId, {
type: 'SUBSCRIPTION',
amount: 0,
currency: 'COINS',
balanceAfter: 0,
details: `Super Shy ${sub.tier}`,
timestamp,
});
return res.json({ success: true, tier: sub.tier });
}
// Coin package — look up package OUTSIDE the tx (read-only,
// stable). Fail fast on unknown package before opening the tx.
const pkgSnap = await db
.collection('coinPackages')
.where('productId', '==', productId)
.limit(1)
.get();
const pkg = pkgSnap.empty ? null : { id: pkgSnap.docs[0].id, ...pkgSnap.docs[0].data() };
if (!pkg) return res.status(404).json({ error: ERR_UNKNOWN_PKG });
const coinsGranted = pkg.coins || 0;
const bonusCoinsGranted = pkg.bonusCoins || 0;
const totalCoins = coinsGranted + bonusCoinsGranted;
// Atomic: re-check receipt + read user + write receipt + grant
// coins, all in one transaction. Reading the user inside the tx
// ensures `newBalance` reflects post-grant state consistently
// even under concurrent purchases.
let newBalance;
try {
newBalance = await db.runTransaction(async (t) => {
const rcptSnap = await t.get(receiptRef);
if (rcptSnap.exists) {
throw new Error(ERR_DUPLICATE);
}
const userSnap = await t.get(userRef);
if (!userSnap.exists) {
throw new Error(ERR_USER_NOT_FOUND);
}
const user = userSnap.data();
const shyCoins = userField(user, 'shyCoins', 'shy_coins') || 0;
// Persist actual granted amounts on the receipt so the refund
// handler can reverse the original entitlement even if
// `coinPackages` is later mutated (price changes, promotional
// bonus weekends, deprecated SKUs).
t.set(receiptRef, {
userId: uniqueId,
productId,
purchaseToken,
platform: purchasePlatform,
isSubscription: false,
createdAt: timestamp,
verified: true,
orderId,
coinsGranted,
bonusCoinsGranted,
});
t.update(userRef, { shyCoins: FieldValue.increment(totalCoins) });
return shyCoins + totalCoins;
});
} catch (txErr) {
if (txErr.message === ERR_DUPLICATE) {
log.warn('economy', 'Duplicate purchase rejected (tx)', { userId: uniqueId, productId });
return res.status(409).json({ error: ERR_DUPLICATE });
}
Eif (txErr.message === ERR_USER_NOT_FOUND) {
return res.status(404).json({ error: ERR_USER_NOT_FOUND });
}
throw txErr;
}
const purchaseTxId = generateId();
await writeTransaction(uniqueId, purchaseTxId, {
type: 'PURCHASE',
amount: totalCoins,
currency: 'COINS',
balanceAfter: newBalance,
details: `${pkg.coins} + ${pkg.bonusCoins || 0} bonus coins`,
timestamp,
});
res.json({ success: true, coinsAdded: totalCoins, newBalance });
} catch (err) {
log.error('economy', 'POST /economy/purchase failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Super Shy trial claim ──
router.post('/economy/trial-claim', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
// Atomic claim: read+set+backpack-write in a single transaction.
// Without this, two concurrent trial-claim requests both read
// hasClaimedSuperShyTrial=false, both pass the guard, both write
// hasClaimedSuperShyTrial=true and add the trial item to backpack
// (set with no merge → quantity:1 each time, so backpack ends up
// with quantity:1 either way, but the user has effectively claimed
// a paid feature unlock TWICE — duplicate audit log entries, double
// analytics trigger, and potentially double-applied entitlement on
// the client side which observes both writes).
//
// Audit C3 (Phase 2A): /economy/trial-claim TOCTOU race.
const userRef = db.doc(`users/${uniqueId}`);
const backpackRef = db.doc(`users/${uniqueId}/backpack/super_shy_trial`);
let shyCoins;
try {
shyCoins = await db.runTransaction(async (t) => {
const snap = await t.get(userRef);
if (!snap.exists) {
throw new Error('User not found');
}
const data = snap.data();
const hasClaimed = userField(
data,
'hasClaimedSuperShyTrial',
'has_claimed_super_shy_trial',
);
if (hasClaimed) {
throw new Error('Trial already claimed');
}
t.update(userRef, { hasClaimedSuperShyTrial: true });
t.set(backpackRef, {
giftId: 'super_shy_trial',
quantity: 1,
giftName: 'Super Shy Trial',
});
return userField(data, 'shyCoins', 'shy_coins') || 0;
});
} catch (txErr) {
if (txErr.message === 'User not found') {
return res.status(404).json({ error: 'User not found' });
}
if (txErr.message === 'Trial already claimed') {
return res.status(409).json({ error: 'Trial already claimed' });
}
throw txErr;
}
const trialClaimTxId = generateId();
await writeTransaction(uniqueId, trialClaimTxId, {
type: 'TRIAL_CLAIM',
amount: 0,
currency: 'COINS',
balanceAfter: shyCoins,
details: 'Claimed 30 days of Super Shy',
});
res.json({ success: true });
} catch (err) {
log.error('economy', 'POST /economy/trial-claim failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Super Shy trial activate ──
router.post('/economy/trial-activate', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const [userSnap, bpSnap] = await Promise.all([
db.doc(`users/${uniqueId}`).get(),
db.doc(`users/${uniqueId}/backpack/super_shy_trial`).get(),
]);
const user = userSnap.exists ? userSnap.data() : null;
const bpItem = bpSnap.exists ? bpSnap.data() : null;
if (!user) return res.status(404).json({ error: 'User not found' });
if (!bpItem || (bpItem.quantity || 0) < 1)
return res.status(402).json({ error: 'No trial item in backpack' });
const timestamp = now();
const thirtyDays = 30 * 24 * 60 * 60 * 1000;
const currentExpiry = userField(user, 'superShyExpiry', 'super_shy_expiry') || 0;
const baseTime = Math.max(currentExpiry, timestamp);
const newExpiry = baseTime + thirtyDays;
const currentTier = userField(user, 'superShyTier', 'super_shy_tier');
const newTier = currentTier && currentTier !== 'trial' ? currentTier : 'trial';
// Remove trial from backpack and activate
await db.doc(`users/${uniqueId}/backpack/super_shy_trial`).delete();
await db.doc(`users/${uniqueId}`).update({
isSuperShy: true,
superShyExpiry: newExpiry,
superShyTier: newTier,
});
const shyCoins = userField(user, 'shyCoins', 'shy_coins') || 0;
const trialActivateTxId = generateId();
await writeTransaction(uniqueId, trialActivateTxId, {
type: 'TRIAL_ACTIVATE',
amount: 0,
currency: 'COINS',
balanceAfter: shyCoins,
details: 'Activated 30 days of Super Shy',
timestamp,
});
res.json({ success: true, newTier, newExpiry });
} catch (err) {
log.error('economy', 'POST /economy/trial-activate failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Test coins (admin only) ──
router.post('/economy/test-coins', async (req, res) => {
try {
if (await requireAdmin(req, res)) return;
const uniqueId = req.auth.uniqueId;
const body = req.body;
const amount = body?.amount;
if (!amount || typeof amount !== 'number' || amount <= 0 || amount > 100000) {
return res.status(400).json({ error: 'amount must be 1-100000' });
}
const userSnap = await db.doc(`users/${uniqueId}`).get();
if (!userSnap.exists) return res.status(404).json({ error: 'User not found' });
const user = userSnap.data();
const shyCoins = userField(user, 'shyCoins', 'shy_coins') || 0;
await db.doc(`users/${uniqueId}`).update({ shyCoins: FieldValue.increment(amount) });
const newBalance = shyCoins + amount;
const testTxId = generateId();
await writeTransaction(uniqueId, testTxId, {
type: 'PURCHASE',
amount,
currency: 'COINS',
balanceAfter: newBalance,
details: `Test purchase (+${amount} coins)`,
});
res.json({ success: true, coinsAdded: amount, newBalance });
} catch (err) {
log.error('economy', 'POST /economy/test-coins failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Balance ──
router.get('/economy/balance', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const userSnap = await db.doc(`users/${uniqueId}`).get();
if (!userSnap.exists) return res.status(404).json({ error: 'User not found' });
const user = userSnap.data();
res.json({
coins: userField(user, 'shyCoins', 'shy_coins') || 0,
beans: userField(user, 'shyBeans', 'shy_beans') || 0,
});
} catch (err) {
log.error('economy', 'GET /economy/balance failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Transactions ──
router.get('/economy/transactions', async (req, res) => {
try {
const uniqueId = req.auth.uniqueId;
const limit = Math.min(Number.parseInt(req.query.limit, 10) || 50, 200);
const filterType = req.query.type;
let query = db.collection(`users/${uniqueId}/transactions`);
if (filterType) {
query = query.where('type', '==', filterType);
}
query = query.orderBy('timestamp', 'desc').limit(limit);
const snap = await query.get();
const results = snap.docs.map((d) => ({ id: d.id, ...d.data() }));
res.json(results);
} catch (err) {
log.error('economy', 'GET /economy/transactions failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Backpack ──
router.get('/users/:uniqueId/backpack', async (req, res) => {
try {
const isAdmin = req.auth.token?.admin;
if (String(req.auth.uniqueId) !== req.params.uniqueId && !isAdmin) {
return res.status(403).json({ error: "Cannot access another user's backpack" });
}
const snap = await db.collection(`users/${req.params.uniqueId}/backpack`).get();
const results = snap.docs.map((d) => ({ id: d.id, ...d.data() }));
res.json(results);
} catch (err) {
log.error('economy', 'GET /users/:uniqueId/backpack failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Gift wall ──
router.get('/users/:uniqueId/gift-wall', async (req, res) => {
try {
// PR 10 — outer cohort gate. The target's gift wall is itself a
// user-owned list, so cross-cohort callers get the byte-identical
// 404 existence-hider. Target doc is fetched once and shared with
// the block check below.
const targetSnap = await db.doc(`users/${req.params.uniqueId}`).get();
const target = targetSnap.exists ? targetSnap.data() : null;
if (await requireSameCohort(req, res, req.params.uniqueId, () => target)) return;
// C7 (block-list integrity): a user who has been blocked by the
// target must not be able to see the target's gift wall. Runs
// AFTER the cohort gate so 403 only fires for same-cohort blocks
// (cross-cohort would have already returned 404).
if (target && viewerIsBlocked(req.auth.uniqueId, target)) {
return res.status(403).json({ error: 'Cannot view content of users who have blocked you' });
}
const snap = await db.collection(`users/${req.params.uniqueId}/giftWall`).get();
const results = snap.docs.map((d) => ({ id: d.id, ...d.data() }));
res.json(results);
} catch (err) {
log.error('economy', 'GET /users/:uniqueId/gift-wall failed', { error: err.message });
res.status(500).json({ error: 'Internal server error' });
}
});
// ── Gift wall senders ──
router.get('/users/:uniqueId/gift-wall/:giftId/senders', async (req, res) => {
try {
// PR 10 — outer cohort gate (mirrors the gift-wall handler above).
const targetSnap = await db.doc(`users/${req.params.uniqueId}`).get();
const target = targetSnap.exists ? targetSnap.data() : null;
if (await requireSameCohort(req, res, req.params.uniqueId, () => target)) return;
// C7: same block check as the parent gift-wall list — the sender
// list is a strict subset of gift-wall data.
if (target && viewerIsBlocked(req.auth.uniqueId, target)) {
return res.status(403).json({ error: 'Cannot view content of users who have blocked you' });
}
const docSnap = await db
.doc(`users/${req.params.uniqueId}/giftWall/${req.params.giftId}`)
.get();
const senders = docSnap.exists ? docSnap.data().senders || [] : [];
// PR 10 — inner cohort filter. Admin (live-verified) bypasses the
// filter to retain moderation visibility. Otherwise each sender's
// cohort comes from a stamped `cohort` field (PR 10 write-time) or
// falls back to a per-entry users/<id> lookup for legacy rows. The
// deleted-user case is dropped explicitly so a deleted account
// can't leak as a same-minor-cohort entry to minor callers.
const isAdmin = req?.auth?.token?.admin === true && Boolean(await isLiveAdmin(req.auth.uid));
const filtered = isAdmin
? senders.slice()
: await filterListByCohort(senders, cohortFromClaim(req), 'senderId');
// Sort by sendCount descending
filtered.sort((a, b) => (b.sendCount || 0) - (a.sendCount || 0));
res.json(filtered);
} catch (err) {
log.error('economy', 'GET /users/:uniqueId/gift-wall/:giftId/senders failed', {
error: err.message,
});
res.status(500).json({ error: 'Internal server error' });
}
});
// Test helper to reset in-memory config cache
router._resetConfigCache = () => {
cachedEconomyConfig = null;
economyConfigCachedAt = 0;
};
module.exports = router;
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