Overview

MeshTxBuilder is a powerful, low-level API for constructing Cardano transactions. It provides complete control over every aspect of transaction building—from simple ADA transfers to complex smart contract interactions, staking operations, and governance actions.

When to use MeshTxBuilder:

Building custom transaction logic beyond standard transfers
Creating multi-signature transactions
Minting and burning native assets
Interacting with Plutus smart contracts
Managing stake delegation and rewards
Participating in on-chain governance

Quick Start

import { MeshTxBuilder, BlockfrostProvider } from "@meshsdk/core";

// Initialize provider and builder
const provider = new BlockfrostProvider("<YOUR_API_KEY>");
const txBuilder = new MeshTxBuilder({
  fetcher: provider,
  verbose: true,
});

// Get wallet data
const utxos = await wallet.getUtxos();
const changeAddress = await wallet.getChangeAddress();

// Build a simple transfer
const unsignedTx = await txBuilder
  .txOut("addr_test1qz...", [{ unit: "lovelace", quantity: "5000000" }])
  .changeAddress(changeAddress)
  .selectUtxosFrom(utxos)
  .complete();

// Sign and submit
const signedTx = await wallet.signTx(unsignedTx);
const txHash = await wallet.submitTx(signedTx);