First Transaction

A couple fundamentals to remember are that in Cardano's eUTxO model, a transaction can consume one or more UTxOs as inputs. Create one or more UTxOs as outputs and that a transaction must be balanced (sum of inputs = sum of outputs + fees).

Build

Let's create a simple transaction where we send 5 ADA to two recipients each:

const tx = await lucid
  .newTx()
  .pay.ToAddress("addr_testa...", { lovelace: 5000000n })
  .pay.ToAddress("addr_testb...", { lovelace: 5000000n })
  .complete();

Sign

const signedTx = await tx.sign.withWallet().complete();

Submit

const txHash = await signedTx.submit();

⚠️

Remember to select a wallet before attempting to build and submit transactions.

Putting it all together

import { Lucid, Koios, generateSeedPhrase } from "@lucid-evolution/lucid";
 
// Initialize Lucid with a provider
const lucid = await Lucid(
  new Koios("https://preprod.koios.rest/api/v1"),
  "Preprod"
);
 
const seedPhrase = generateSeedPhrase(); // BIP-39
lucid.selectWallet.fromSeed(seedPhrase); // Select a wallet for signing
 
// Build, sign and submit transaction
const tx = await lucid
  .newTx()
  .pay.ToAddress("addr_testa...", { lovelace: 5000000n }) // Pay 5 ADA to addr_testa...
  .pay.ToAddress("addr_testb...", { lovelace: 5000000n }) // Pay 5 ADA to addr_testb...
  .complete(); // Balance the transaction and initiate UTxO selection
 
const signedTx = await tx.sign.withWallet().complete();
const txHash = await signedTx.submit();
 
console.log("Transaction Submitted:", txHash);

Wallet Management Pay Methods