import { DutchOrder, NonceManager } from '@uniswap/uniswapx-sdk';
import { ethers } from 'ethers';

const provider = new ethers.providers.JsonRpcProvider(RPC_URL);
const account = await provider.getSigner().getAddress(); 
const nonceMgr = new NonceManager(provider, 1); 
const nonce = await nonceMgr.useNonce(account); 

const chainId = 1;
const builder = new DutchOrderBuilder(chainId);
const order = builder
  .deadline(deadline)
  .decayEndTime(deadline)
  .decayStartTime(deadline - 100)
  .nonce(nonce)
  .input({
    token: '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48',
    amount: BigNumber.from('1000000'),
  })
  .output({
    token: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2',
    startAmount: BigNumber.from('1000000000000000000'),
    endAmount: BigNumber.from('900000000000000000'),
    recipient: '0x0000000000000000000000000000000000000000',
  })
  .build();
 
// Sign the built order 
const { domain, types, values } = order.permitData();
const signature = wallet._signTypedData(domain, types, values);

const serializedOrder = order.serialize();
// submit serializedOrder and signature to order pool

import { DutchOrder, Order } from '@uniswap/uniswapx-sdk';

const serializedOrder = '0x1111222233334444555500000000234300234...';
const chainId = 1; 

const order: Order = DutchOrder.parse(serializedOrder, chainId);

const orderData = order.info;
const orderHash = order.hash();

import { ethers } from 'ethers';
import { OrderValidator } from 'uniswapx-sdk';

const provider = new ethers.providers.JsonRpcProvider(RPC_URL);
const validator = new OrderValidator(provider, CHAIN_ID); 
const orders: SignedOrder[] = [
  {
    order: order1, 
    signature: signature1
  }, 
  {
    order: order2, 
    signature: signature2
  }
]; 

try {
  const statusList: OrderValidation[] = await validator.validateBatch(orders); 
  // Do something with list of statuses 
}
catch(e) {
  // Handle error
}