Marketplace (ZX Coin)

ZX Coin = mata uang ortu. Marketplace: beli hadiah, konten, withdrawal.

Model:

• CoinWallet — saldo per ortu
• CoinLedger — TOPUP/PEMBELIAN/PENJUALAN/REFERRAL/BONUS/PENYESUAIAN
• Hadiah — katalog hadiah ortu (hargaCoin, stok)
• PesananHadiah — anak beli hadiah → ortu proses
• KontenMarketplace — PAKET_SOAL/PRESET/KUIS_HARIAN/ARTIKEL/VIDEO/TANTANGAN_MINGGUAN
• PembelianKonten — 1x beli per konten
• OfficialMeta — scheduling, targeting, metrics
• Withdrawal — MINTA/DISETUJUI/DITOLAK/SELESAI
• Langganan — FREE_TRIAL/PRO/ELITE, Midtrans order

API:

• GET/POST /api/coin — saldo + topup/penyesuaian
• GET/POST /api/hadiah — hadiah CRUD
• POST /api/hadiah/pesanan — proses pesanan (beli/tolak)
• GET/POST /api/marketplace — konten marketplace
• POST /api/marketplace/beli — beli konten
• POST /api/marketplace/withdrawal — tarik coin
• GET /api/langganan/status — status
• POST /api/langganan/checkout — Midtrans checkout
• POST /api/langganan/webhook — Midtrans webhook

App ortu: LayarMarketplace.kt, LayarLangganan.kt