Permit2 is Uniswap's universal token approval system that enables gasless approvals after a one-time setup. Instead of approving each protocol separately, you approve Permit2 once and then use off-chain signatures for all subsequent token transfers.

## Why Use Permit2?

- **Cost Savings** - After the initial approval, no gas is required for future approvals
- **Better Security** - Permits are time-limited and can specify exact amounts
- **Improved UX** - Users sign a message instead of submitting a transaction

## How It Works

1. **One-Time Setup** - Approve your tokens to the Permit2 contract (can be max amount)
2. **Get Quote** - Request a quote with `isPermit2: true` flag
3. **Create Order** - The SDK generates a Permit2 signature bundled with your order
4. **Submit** - The relayer verifies the signature and executes the swap

## Interactive Code Example

Explore the complete implementation — this example demonstrates swapping USDC to WETH using Permit2:

<stackblitz example="intent-swap" file="src/evm/swap-with-permit2.ts" />