Swap on BDEX V2

import { createPublicClient, createWalletClient, erc20Abi, formatUnits, http, parseEther } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { botChainTestnet } from "@uzolabs/sdk/chains";
import { bdexV2Router02Abi, getAddresses } from "@uzolabs/sdk/contracts";

const account = privateKeyToAccount(process.env.BOT_PRIVATE_KEY as `0x${string}`);
const publicClient = createPublicClient({ chain: botChainTestnet, transport: http() });
const walletClient = createWalletClient({ account, chain: botChainTestnet, transport: http() });
const { wbot, usdt, bdexV2Router02: router } = getAddresses(botChainTestnet.id);
const explorer = botChainTestnet.blockExplorers.default.url;

const amountIn = parseEther("0.001"); // 0.001 WBOT
const path = [wbot, usdt] as const;
const slippageBps = 50n; // 0.5%

// 1. Quote. The last item is the USDT you would get (6 decimals).
const amounts = await publicClient.readContract({ address: router, abi: bdexV2Router02Abi, functionName: "getAmountsOut", args: [amountIn, [...path]] });
const quoted = amounts[amounts.length - 1];
const amountOutMin = (quoted * (10_000n - slippageBps)) / 10_000n;
console.log(`Quote: ${formatUnits(quoted, 6)} USDT, minimum ${formatUnits(amountOutMin, 6)} USDT`);

// 2. Approve the router for exactly amountIn, if needed.
const allowance = await publicClient.readContract({ address: wbot, abi: erc20Abi, functionName: "allowance", args: [account.address, router] });
if (allowance < amountIn) {
  const approveHash = await walletClient.writeContract({ address: wbot, abi: erc20Abi, functionName: "approve", args: [router, amountIn] });
  await publicClient.waitForTransactionReceipt({ hash: approveHash });
  console.log(`Approved: ${explorer}/tx/${approveHash}`);
}

// 3. Simulate, then send the swap with a 20 minute deadline.
const deadline = BigInt(Math.floor(Date.now() / 1000) + 20 * 60);
const { request } = await publicClient.simulateContract({
  account,
  address: router,
  abi: bdexV2Router02Abi,
  functionName: "swapExactTokensForTokens",
  args: [amountIn, amountOutMin, [...path], account.address, deadline],
});
const hash = await walletClient.writeContract(request);
const receipt = await publicClient.waitForTransactionReceipt({ hash });
console.log(`Swap ${receipt.status}: ${explorer}/tx/${hash}`);

const usdtBalance = await publicClient.readContract({ address: usdt, abi: erc20Abi, functionName: "balanceOf", args: [account.address] });
console.log(`USDT balance: ${formatUnits(usdtBalance, 6)}`);