# Intro to Gamicard

> **TL;DR**\
> **Gamicard** is a provably‑fair, on‑chain scratch‑card game on **Aptos** that awards **instant APT prizes**, fuels a rolling **multi‑tier Jackpot**, runs a monthly **Grand Giveaway (GA)**, and grants **loyalty points** for every play.

#### What is Gamicard?

Gamicard turns the familiar fun of scratch cards into a transparent, on‑chain game built on Aptos. Each purchase mints a card‑NFT, you scratch a **5×5 icon grid**, and instantly see what you win: **APT prizes**, **Jackpot hits**, **Grand Giveaway raffle tickets**, and **Points**.

#### Why it matters

* **Provably fair**: Deterministic mapping from on‑chain randomness to outcomes; anyone can recompute the reveal off‑chain using the seed and block refs.
* **Transparent economy**: Clear fund split per purchase; auditable pools; jackpot and GA mechanics are fully documented.
* **Frictionless UX**: A **Delegator Account** lets you open many cards with a single signature while keeping custody of your wallet.

#### Key entities

* **Card tiers** (price in APT): *Fortune* (**0.5 APT**), *Prosperity* (**1 APT**), *Abundance* (**5 APT**).
* **Pools**: Card‑Reward Pools (per tier), **Jackpot Pool** (global), **Grand Giveaway Pool**, **Referral Pool**, **Protocol Revenue**.
* **Assets**: APT (prizes), **Card NFTs** (one per purchased card), **Raffle** **Tickets** (for GA), **Points** (for loyalty & rewards).

#### Fairness overview

1. Draw **random seed** on‑chain.
2. Deterministically map seed → **grid icons**, **jackpot icon flag**, **ticket flag**, **points**.
3. Persist outcome on‑chain with proofs (txn hash/seed) so anyone can re‑verify.

#### “Sure‑Win” principle

Every card **always** yields something positive:

* an **APT payout**, or/and
* a **Grand Giveaway ticket**, and/or
* **Points** (redeemable for future benefits).

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