# Escrow Market SDK

SDK for the Escrow Market program on the Solana blockchain.

## Installation

```bash
npm install escrow-market-sdk
```

or

```bash
yarn add escrow-market-sdk
```

## SDK Structure

The SDK is organized into the following modules:

- **EscrowMarketClient**: The main class for interacting with the program
- **Types**: Interfaces and types for accounts, instructions, and events
- **Utils**: Utility functions for finding PDAs, data type conversions, etc.
- **Constants**: Constants used in the program

## Basic Usage

```typescript
import { Connection, Keypair, PublicKey, sendAndConfirmTransaction } from '@solana/web3.js';
import { EscrowMarketClient } from 'escrow-market-sdk';

// Connect to Solana cluster
const connection = new Connection('https://api.devnet.solana.com', 'confirmed');

// Initialize client with program ID
const programId = 'your_program_id_here'; // Program ID as string
const client = new EscrowMarketClient(connection, programId);

// Send a transaction with your keypair
const tx = await client.someMethod(...);
const signature = await sendAndConfirmTransaction(connection, tx, [yourKeypair]);
```

## Main Functions

### 1. Initialize

Initialize the Config account for the escrow market:

```typescript
const admin = new PublicKey('...');
const operator = new PublicKey('...');

// Creates transaction object that needs to be signed and sent
const tx = await client.initialize(feePayer, admin, operator);
const signature = await sendAndConfirmTransaction(connection, tx, [feePayerKeypair]);
console.log(`Initialize successful: ${signature}`);
```

### 2. Initialize Vault

Initialize a vault for a mint:

```typescript
const mint = new PublicKey('...');

// Creates transaction object that needs to be signed and sent
const tx = await client.initializeVault(feePayer, mint);
const signature = await sendAndConfirmTransaction(connection, tx, [feePayerKeypair]);
console.log(`Initialize vault successful: ${signature}`);
```

### 3. Deposit

Deposit tokens into the vault:

```typescript
const mint = new PublicKey('...');
const amount = 1_000_000; // 1 token with 6 decimals

// Creates transaction object that needs to be signed and sent
const tx = await client.deposit(depositor, mint, amount);
const signature = await sendAndConfirmTransaction(connection, tx, [depositorKeypair]);
console.log(`Deposit successful: ${signature}`);
```

### 4. Withdraw

Withdraw tokens from the vault:

```typescript
const mint = new PublicKey('...');
const amount = 1_000_000; // 1 token with 6 decimals
const nonce = 123456; // Unique nonce to prevent replay attacks

// Creates transaction object that needs to be signed and sent
const tx = await client.withdraw(operatorPubkey, user, mint, amount, nonce);
const signature = await sendAndConfirmTransaction(connection, tx, [operatorKeypair]);
console.log(`Withdraw successful: ${signature}`);
```

### 5. Settle

Complete a deal:

```typescript
const dealId = 'deal-123';
const buyer = new PublicKey('...');
const seller = new PublicKey('...');
const tokenTransfer = new PublicKey('...');  // Token being transferred from seller to buyer
const tokenWithdraw = new PublicKey('...');  // Token being withdrawn from vault to seller
const transferAmount = 1_000_000;  // Amount of tokenTransfer
const withdrawAmount = 2_000_000;  // Amount of tokenWithdraw

// Creates transaction object that needs to be signed and sent
const tx = await client.settle(
  operatorPubkey,
  dealId,
  buyer,
  seller,
  tokenTransfer,
  tokenWithdraw,
  transferAmount,
  withdrawAmount
);
const signature = await sendAndConfirmTransaction(connection, tx, [operatorKeypair]);
console.log(`Settle successful: ${signature}`);
```

### 6. Operator Cancel

Cancel a deal by the operator:

```typescript
const dealId = 'deal-123';
const buyer = new PublicKey('...');
const tokenWithdraw = new PublicKey('...');
const amount = 1_000_000;

// Creates transaction object that needs to be signed and sent
const tx = await client.operatorCancel(
  operatorPubkey,
  dealId,
  buyer,
  tokenWithdraw,
  amount
);
const signature = await sendAndConfirmTransaction(connection, tx, [operatorKeypair]);
console.log(`Cancel successful: ${signature}`);
```

### 7. Parse Events

Parse events from a transaction:

```typescript
const signature = "..."; // Transaction signature

const events = await client.parseEventsFromTransaction(signature);
console.log('Events:', events);
```

### 8. Get Information

```typescript
// Get config
const config = await client.getConfig();
console.log('Config:', config);

// Get deal information
const dealId = 'deal-123';
const deal = await client.getDeal(dealId);
console.log('Deal:', deal);

// Get vault balance
const mint = new PublicKey('...');
const balance = await client.getVaultBalance(mint);
console.log(`Vault balance: ${balance}`);
```

### 9. Subscribe to Events

```typescript
// Register event listener
const listenerId = client.subscribeToEvents('SettleEvent', (event) => {
  console.log('Settle event:', event);
});

// Unsubscribe
await client.unsubscribeFromEvent(listenerId);
```

## Examples

The SDK comes with examples to help you get started.

## Development Notes

1. **PDA Management**: Make sure you use the correct seeds for PDAs when interacting with the program.
2. **Error Handling**: Always wrap function calls in try/catch blocks to handle errors.
3. **Token Balance**: Check token balances before performing deposit, withdraw, or settle transactions.
4. **Permissions**: Only the admin can initialize the program, and only the operator can cancel deals.
5. **Token Programs**: The SDK supports both standard SPL tokens and custom token programs.

## License

MIT