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utils/projectCommission.js

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+const WalletTransactionModel = require('../models/WalletTransactionModel')
+
+/** Paid to the selected user in full when the creator accepts/pays to select them. */
+const PROJECT_ACCEPT_RATE = 0.3
+/** Platform commission taken from the remaining amount paid at project completion. */
+const PROJECT_COMPLETION_COMMISSION_RATE = 0.1
+
+/** Credits the selected user's project wallet bucket and pushes a live notification if possible. */
+async function creditProjectShare (io, userId, amount, referenceId, description) {
+  if (!userId || amount <= 0) return
+  await WalletTransactionModel.create({
+    user: userId,
+    bucket: 'project',
+    type: 'credit',
+    amount,
+    referenceType: 'payment',
+    referenceId,
+    description
+  })
+  if (io) {
+    try {
+      io.to(`user:${String(userId)}`).emit('notification', {
+        type: 'project_commission',
+        title: 'واریز به کیف پول',
+        description
+      })
+    } catch (_) {}
+  }
+}
+
+module.exports = {
+  PROJECT_ACCEPT_RATE,
+  PROJECT_COMPLETION_COMMISSION_RATE,
+  creditProjectShare
+}