Transaction end-to-end ID. This field is a Brazil Central Bank (BCB) requirement to track all Pix transaction steps.

Account token - an access token encoded with a Pismo account ID. Tokens can expire quickly, which can result in a 401 Unauthorized message.

A unique ID to ensure the operation remains idempotent, allowing for operation repitition without causing unintended effects or duplication. An idempotent operation is one that can be applied multiple times, yet the outcome remains the same. it ensures that network errors, retries, or failures can occur without introducing inconsistencies.