---
id: core-transaction-lifecycle
title: Transaction Lifecycle
keywords:
  - core
  - account
description: Core protocol design - transaction lifecycle.
---

---

The diagram below illustrates how transactions flow within the Zilliqa network
from user creation to Tx block generation.

Contributors may also be interested to review these related documents:

- [Types of Nodes](../../../basics/zilliqa-architecture/basics-zil-nodes.md) under the Basics section (for
  understanding the roles of nodes in the network)
- [Transaction Lifecycle](../../../developers/transaction-lifecycle/dev-txn-signing.md) under the Developers
  section (for handling transactions at user level)
- [Account Management](core-accounts.md) under the
  Contributors section (for the meaning of state deltas)

In the diagram, it is worth emphasizing that epoch time has been optimized by
configuring the lookup nodes to dispatch transaction packets (for next epoch) to
shards during the time these shards are idle (i.e., while waiting for the Tx
block after microblock generation), and to similarly dispatch transaction
packets (for current epoch) to the DS committee during the time the committee is
idle (i.e., while waiting for the shard microblocks after Tx block generation).
This setup reduces network latency incurred by node-to-node communication.

![image01](../../../assets/img/contributors/core/transaction-lifecycle/image01.png)