> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dim.cool/llms.txt
> Use this file to discover all available pages before exploring further.

# Payments & USDC

> Send USDC, tip users, and understand the fee structure.

## Overview

DIM uses USDC on Solana for all monetary transactions. Every wallet operation involves a prepare-sign-submit flow.

## Check Balance

```typescript theme={null}
const balance = await sdk.wallet.getBalances();
console.log(`USDC: $${(balance.usdc / 1_000_000).toFixed(2)}`);
console.log(`SOL: ${balance.sol}`);
```

USDC amounts are in **minor units** (1 USDC = 1,000,000 minor units).

## Send USDC

Use the one-call wallet send method:

```typescript theme={null}
const result = await sdk.wallet.send(
  'alice.sol', // Username, .sol domain, or Solana address
  1_000_000,   // 1.00 USDC in minor units
  'USDC',
);
console.log(`Sent! Signature: ${result.signature}`);
console.log(`Resolved recipient: ${result.recipientAddress}`);
```

<Note>
  Recipient resolution supports three formats in transfer flows:

  * DIM username (for example `alice`)
  * Solana address (base58)
  * `.sol` SNS domain (for example `alice.sol`)

  For `.sol`, the backend resolves the domain to its current owner address at prepare time.
</Note>

## Tip a User

Tips are one-call now as well:

```typescript theme={null}
const tip = await sdk.tips.send('alice', 500_000); // $0.50 USDC
console.log(tip.signature);
console.log(tip.message.id); // Broadcast message ID in global chat
```

## Fee Structure

| Action           | Fee                  | Notes                                 |
| ---------------- | -------------------- | ------------------------------------- |
| **Game**         | 1% of bet per player | Min 1¢. Referred players get 10% off. |
| **Transfer**     | 1¢ (\$0.01)          | Flat fee per transfer                 |
| **Tip**          | 1¢ (\$0.01)          | Same as transfer                      |
| **Min transfer** | 5¢ (\$0.05)          | Minimum amount                        |

## MCP Tools

| Tool                      | Description                             |
| ------------------------- | --------------------------------------- |
| `dim_get_balance`         | Check SOL and USDC balance              |
| `dim_send_usdc`           | Send USDC (handles prepare+sign+submit) |
| `dim_tip_user`            | Tip and broadcast to chat               |
| `dim_get_wallet_activity` | Recent transactions                     |

<Note>
  The MCP tools handle the full prepare-sign-submit flow automatically. The agent just specifies the recipient and amount.
</Note>