Uniswap V4

import { UniswapV4 } from './UniswapV4.js';

const v4 = UniswapV4({
  provider,
  poolManager: POOL_MANAGER_ADDRESS,
});

// Get pool state
const pool = await v4.getPool({
  currency0: USDC,
  currency1: WETH,
  fee: 3000,
  tickSpacing: 60,
  hooks: HOOK_ADDRESS,
});

console.log('sqrtPriceX96:', pool.sqrtPriceX96);
console.log('liquidity:', pool.liquidity);
console.log('tick:', pool.tick);

// Execute swap through V4
const tx = await v4.swap({
  poolKey: {
    currency0: USDC,
    currency1: WETH,
    fee: 3000,
    tickSpacing: 60,
    hooks: ZERO_ADDRESS,
  },
  params: {
    zeroForOne: true,
    amountSpecified: parseUnits('1000', 6), // 1000 USDC
    sqrtPriceLimitX96: MIN_SQRT_RATIO + 1n,
  },
  signer,
});

// Add liquidity to a V4 pool
const tx = await v4.modifyLiquidity({
  poolKey,
  params: {
    tickLower: -887220,
    tickUpper: 887220,
    liquidityDelta: parseEther('1'),
  },
  signer,
});

// Encode hook permissions
import { HookFlags } from './hooks.js';

const permissions = HookFlags.encode({
  beforeSwap: true,
  afterSwap: true,
  beforeAddLiquidity: false,
  afterAddLiquidity: false,
  // ...
});

// Validate hook address matches permissions
const isValid = HookFlags.validate(hookAddress, permissions);