Deposit with a server-planned route

import {
  createComposeSdk,
  routeAmount,
  terminalOutputs,
} from '@lifi/composer-sdk';
import { createPublicClient, createWalletClient, http, type Hex } from 'viem';
import { privateKeyToAccount } from 'viem/accounts';
import { mainnet } from 'viem/chains';

// Ethereum mainnet (chainId 1).
const USDT = '0xdAC17F958D2ee523a2206206994597C13D831ec7';
// Aave V3 aEthUSDC receipt token
const A_ETH_USDC = '0x98C23E9d8f34FEFb1B7BD6a91B7FF122F4e16F5c';

const account = privateKeyToAccount(process.env.PRIVATE_KEY as Hex);
const wallet = createWalletClient({ account, chain: mainnet, transport: http() });
const client = createPublicClient({ chain: mainnet, transport: http() });

const sdk = createComposeSdk({
  baseUrl: 'https://composer.li.quest',
  apiKey: process.env.LIFI_API_KEY!,
});

// Throws a ComposeError with kind 'no_route_error' when no route exists.
const result = await sdk.route({
  chainId: 1,
  fromToken: USDT,
  toToken: A_ETH_USDC,
  amount: routeAmount.exact(1_000_000_000n), // 1,000 USDT (6 decimals)
  signer: account.address,
  // Required when the route opens with a swap: receives the swap's unspent input.
  sweepTo: { $ref: 'context.sender' },
  slippageBps: 100, // 1% end-to-end floor on the final output
  checkOnChainAllowances: true, // skip the approval if the allowance already covers it
});

const delivered = terminalOutputs(result.outputs)['zap.amountOut'];
console.log('Expected aEthUSDC:', delivered?.amount.estimate?.value);
console.log('Floor aEthUSDC:', delivered?.amount.minimum?.value);

for (const action of result.actions ?? []) {
  if (action.kind !== 'transaction') continue;
  const tx = action.transactionRequest;
  const hash = await wallet.sendTransaction({
    to: tx.to as Hex,
    data: tx.data as Hex,
    value: BigInt(tx.value),
    ...(tx.gasLimit ? { gas: BigInt(tx.gasLimit) } : {}),
  });
  const receipt = await client.waitForTransactionReceipt({ hash });
  console.log(action.purpose, hash, receipt.status);
}