# Adding complex operations

If you want to work with TransactionBuilder in more complex way, it is recommendet to initialize it from hive chain interface. It allows you to avoid complexity of your work.

Below is an example of fully building more complex transaction using the TransactionBuilder interface and our useBuilder functionality.

import { createHiveChain, WitnessSetPropertiesBuilder } from '@hiveio/wax';

// Initialize chain
const chain = await createHiveChain();

// Initialize transaction
const tx = await chain.getTransactionBuilder();

// Build operation
tx.useBuilder(WitnessSetPropertiesBuilder, builder => {
  builder.setUrl('https://example.com')
}, 'owner', 'STM...');

// Build up ProtoTransaction object holding all operations and transaction TAPOS & expiration data, but transaction is **not signed yet**
const builtTransaction = tx.build();

The useBuilder method allows for simple construction of an operation. It takes the following parameters:

• The constructor of the builder class you want to use,
• An arrow function, inside which you can make use of all the methods available within the given builder,
• Other arguments specific to the given builder.

The useBuilder method returns an instance of TransactionBuilder, on which you can later perform operations related to the transaction.

More complex information about useBuilder are presented in subsequent chapters.