### builder(): [TransactionPayloadBuilder](#transactionpayloadbuilder)

Return a new `TransactionPayloadBuilder` to build a `TransactionPayload`.

### essence(): [Essence](#essence)

Return the essence of a `TransactionPayload`.

### id(): [TransactionId](#transactionid)

Computes the identifier of a `TransactionPayload`.

### unlockBlocks(): [UnlockBlock[]](#unlockblock)

Return unlock blocks of a `TransactionPayload`.