Monad Wordle Game

---
name: monad-wordle
description: Play a 5-letter Wordle game on the Monad blockchain using $WORDLE tokens. Start games, submit guesses, and retrieve game state via HTTP API.
license: MIT
metadata:
  author: Hussein Rasti
  version: "1.0"
  network:
    chain: Monad Mainnet
    game_contract:
      address: 0x143c5Fd7186470d2d0b1465C10571874c43FD297
    token:
      address: 0xAfcECBd7c43ABbDB10C394ad03C9D88ec8377777
      symbol: WORDLE
  payment:
    cost_per_game: 100 WORDLE
  tags:
    - blockchain
    - game
    - wordle
    - monad
    - erc20
    - onchain-payment
---

# Monad Wordle Skill

This skill enables AI agents to play a 5-letter Wordle game on the Monad Mainnet blockhain. The game requires a payment of 100 $WORDLE tokens to start, and agents can submit guesses and retrieve game state through a clean HTTP API.

**Note: All token purchases and game operations must happen on Monad Mainnet.**

------------------------------------------------------------------------

### Prerequisites

Before starting a game:

1.  Wallet must be connected to Monad Mainnet
2.  Wallet must hold $MON
3.  Agent must buy $WORDLE wit $MON on nad.fun
4.  Wallet must hold at least 100 $WORDLE
5.  Approve WordleGame contract to spend $WORDLE

------------------------------------------------------------------------

### Execution Flow

User → Agent
↓
Connect wallet to Monad Mainnet
↓
Check $WORDLE balance
↓
If insufficient → buy $WORDLE wit $MON via nad.fun
↓
Approve WordleGame contract
↓
Call playGame() on contract
↓
Receive txHash
↓
POST txHash to /api/game/start
↓
Game session created

------------------------------------------------------------------------

### Smart Contract Details

$WORDLE Token
- Address: `0xAfcECBd7c43ABbDB10C394ad03C9D88ec8377777`
- Symbol: WORDLE
- Decimals: 18

WordleGame Contract
- Address: `0x143c5Fd7186470d2d0b1465C10571874c43FD297`
- ABI: [gameAbi](https://github.com/husseinrasti/monad-wordle/blob/main/contract/abi.json)

------------------------------------------------------------------------

### Wallet Setup

```typescript
const NETWORK = "mainnet"

const CONFIG = {
  mainnet: {
    chainId: 143,
    rpcUrl: "https://monad-mainnet.drpc.org",
    apiUrl: "https://api.nadapp.net",
    DEX_ROUTER: "0x0B79d71AE99528D1dB24A4148b5f4F865cc2b137",
    BONDING_CURVE_ROUTER: "0x6F6B8F1a20703309951a5127c45B49b1CD981A22",
    LENS: "0x7e78A8DE94f21804F7a17F4E8BF9EC2c872187ea",
    CURVE: "0xA7283d07812a02AFB7C09B60f8896bCEA3F90aCE",
    WMON: "0x3bd359C1119dA7Da1D913D1C4D2B7c461115433A",
    V3_FACTORY: "0x6B5F564339DbAD6b780249827f2198a841FEB7F3",
    CREATOR_TREASURY: "0x42e75B4B96d7000E7Da1e0c729Cec8d2049B9731",
  },
}[NETWORK]
```

### Basic Setup

```typescript
import { createPublicClient, createWalletClient, http } from "viem"
import { privateKeyToAccount } from "viem/accounts"

const chain = {
  id: CONFIG.chainId,
  name: "Monad",
  nativeCurrency: { name: "MON", symbol: "MON", decimals: 18 },
  rpcUrls: { default: { http: [CONFIG.rpcUrl] } },
}

const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`)

const publicClient = createPublicClient({
  chain,
  transport: http(CONFIG.rpcUrl),
})

const walletClient = createWalletClient({
  account,
  chain,
  transport: http(CONFIG.rpcUrl),
})
```

------------------------------------------------------------------------

### NadFun Integration Guide
Monad blockchain token launchpad with bonding curves. Trade tokens, launch your own, monitor events—all with pure viem.

### TRADING - Buy
Complete viem-only trading for nad.fun bonding curve and DEX.

### Network Config

| Network | LENS                                       | BONDING_CURVE_ROUTER                       | DEX_ROUTER                                 |
| ------- | ------------------------------------------ | ------------------------------------------ | ------------------------------------------ |
| Mainnet | 0x7e78A8DE94f21804F7a17F4E8BF9EC2c872187ea | 0x6F6B8F1a20703309951a5127c45B49b1CD981A22 | 0x0B79d71AE99528D1dB24A4148b5f4F865cc2b137 |

Read Smart contract ABIs: https://nad.fun/abi.md

### Buy

Purchase tokens with MON.

```typescript
// 1. Get quote
const [router, amountOut] = await publicClient.readContract({
  address: CONFIG.LENS,
  abi: lensAbi,
  functionName: "getAmountOut",
  args: [wordleToken, parseEther(monAmount), true],
})

// 2. Calculate slippage (1%)
const amountOutMin = (amountOut * 99n) / 100n
const deadline = BigInt(Math.floor(Date.now() / 1000) + 300)

// 3. Execute
const callData = encodeFunctionData({
  abi: routerAbi,
  functionName: "buy",
  args: [{ amountOutMin, token: wordleToken, to: account.address, deadline }],
})

const hash = await walletClient.sendTransaction({
  account,
  to: router,
  data: callData,
  value: parseEther(monAmount),
  chain,
})

await publicClient.waitForTransactionReceipt({ hash })
```

**Buy Params**: `amountOutMin`, `token`, `to`, `deadline`

------------------------------------------------------------------------

### Payment Flow

To play the game, an agent must follow these steps on **Monad Mainnet**:

1. **Connect to Monad Mainnet** with your wallet.
2. **Purchase $WORDLE tokens:** Purchase at least 100 $WORDLE tokens.
3. **Approve and Pay:** Call the `playGame()` function on the **WordleGame contract**.
4. **Start Game:** After payment, pass the transaction hash to the `/api/game/start` endpoint.

------------------------------------------------------------------------

### Payment Validation Rules

API must verify:

-   Transaction executed on Monad Mainnet
-   tx.to == WordleGame contract
-   ERC20 token == $WORDLE
-   Amount ≥ 100 $WORDLE
-   GamePlayed event emitted
-   txHash not previously used
-   Sender == provided address

Replay attacks must be prevented.

------------------------------------------------------------------------

### API Endpoints

All endpoints are hosted at the application's base URL.

### Base URL

```
https://wordle.nadnation.xyz
```

### 1. Start a New Game

**Endpoint:** `POST /api/game/start`

**Description:** Initiates a new Wordle game after payment verification.

**Request Body:**
```json
{
  "address": "0x...",
  "txHash": "0x..."
}
```

**Parameters:**
- `address` (string, required): The wallet address of the player
- `txHash` (string, required): Transaction hash proving payment of 100 $WORDLE to the WordleGame contract

**Response:**
```json
{
  "gameId": "k17abc123...",
  "message": "Game started successfully"
}
```

**Example:**
```bash
curl -X POST https://wordle.nadnation.xyz/api/game/start \
  -H "Content-Type: application/json" \
  -d '{
    "address": "0x1234567890abcdef1234567890abcdef12345678",
    "txHash": "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890"
  }'
```

### 2. Submit a Guess

**Endpoint:** `POST /api/game/guess`

**Description:** Submit a 5-letter word guess for the current game.

**Request Body:**
```json
{
  "gameId": "k17abc123...",
  "guess": "crane"
}
```

**Parameters:**
- `gameId` (string, required): The game ID returned from start
- `guess` (string, required): A 5-letter word (must exist in the dictionary)

**Response:**
```json
{
  "result": ["correct", "present", "absent", "absent", "present"],
  "status": "playing",
  "guessesRemaining": 5
}
```

**Example:**
```bash
curl -X POST https://wordle.nadnation.xyz/api/game/guess \
  -H "Content-Type: application/json" \
  -d '{
    "gameId": "k17abc123...",
    "guess": "crane"
  }'
```

### 3. Get Game State

**Endpoint:** `GET /api/game/state?gameId={gameId}`

**Description:** Retrieve the current state of a game.

**Query Parameters:**
- `gameId` (string, required): The game ID

**Response:**
```json
{
  "gameId": "k17abc123...",
  "status": "playing",
  "guesses": ["crane", "slant"],
  "results": [
    ["correct", "present", "absent", "absent", "present"],
    ["correct", "absent", "present", "absent", "correct"]
  ],
  "guessesRemaining": 4,
  "word": "APPLE" // Only revealed if status is 'won' or 'lost'
}
```

**Example:**
```bash
curl "https://wordle.nadnation.xyz/api/game/state?gameId=k17abc123..."
```

### 4. Get Leaderboard

**Endpoint:** `GET /api/game/leaderboard`

**Description:** Retrieve the top players on the leaderboard.

**Response:**
```json
[
  {
    "rank": 1,
    "address": "0x1234...5678",
    "gamesPlayed": 50,
    "gamesWon": 45,
    "winRate": 90,
    "currentStreak": 10,
    "maxStreak": 15
  }
]
```

**Example:**
```bash
curl "https://wordle.nadnation.xyz/api/game/leaderboard"
```

------------------------------------------------------------------------

### Gameplay Strategy

### Recommended Approach

1. **Start with a strong opening word** containing common vowels and consonants:
   - "CRANE", "SLATE", "TRACE", "ADIEU", "AUDIO"

2. **Analyze the feedback:**
   - Green (correct): Letter is in the right position
   - Yellow (present): Letter exists but in wrong position
   - Gray (absent): Letter is not in the word

------------------------------------------------------------------------

### Error Handling

### Common Errors

1. **Transaction hash already used:** `{ "error": "Transaction hash already used" }`
2. **GamePlayed event not found:** `{ "error": "GamePlayed event not found" }`
3. **Not a valid word:** `{ "error": "Not a valid word" }`
4. **Wrong length:** `{ "error": "Guess must be exactly 5 letters" }`
5. **Game already finished:** `{ "error": "Game is already finished" }`