🚆Executing Transactions

Execute transactions to fulfill your users' intents.

One you know how to make a request from the Lego Client, you can execute the transaction however you want.

In this example we use Viem to execute a transaction, you'll need to input the result of the SwapForNFT function and simple sign the transaction like any other.

import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";
import { LegoClient } from '@shogun-sdk/money-legos';

async function setupBuyNftWithViem() {
  // 1. Initialize the Lego client
  const legoClient = new LegoClient({
    apiKey: "your api key here",
  });

  // 2. Set up your wallet
  const account = privateKeyToAccount("0x..."); // Your private key
  const client = createWalletClient({
    chain: base,
    transport: http(),
    account,
  });

  try {
    // 3. Fetch the purchase data
    const { data } = await legoClient.MagicEden.SwapForNFT({
      token: {
        address: "0x0000000000000000000000000000000000000000", // ETH
        decimals: 18,
        chainId: 8453, // Base chain
      },
      items: [
        {
          address: "0x72d876d9cdf4001b836f8e47254d0551eda2eebb", // NFT contract
          tokenId: "32", // NFT ID
        },
      ],
      userAddress: account.address,
    });
    
    if (!data) {
      console.error("No data returned from MagicEden.SwapForNFT");
      return;
    }
    
    // 4. Execute each transaction step
    const { steps } = data;
    for (const step of steps) {
      console.log(`Executing step: ${step.description || 'Unknown step'}`);
      
      const txHash = await client.sendTransaction({
        to: step.to as `0x${string}`,
        data: step.data as `0x${string}`,
        value: BigInt(step.value),
        chainId: step.chainId,
        gas: BigInt(step.gas),
        maxFeePerGas: BigInt(step.maxFeePerGas),
        maxPriorityFeePerGas: BigInt(step.maxPriorityFeePerGas),
      });
      
      console.log(`Transaction successful! Hash: ${txHash}`);
    }
  } catch (error) {
    console.error("Error during NFT purchase:", error);
  }
}