> For the complete documentation index, see [llms.txt](https://hub.bsvblockchain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hub.bsvblockchain.org/higher-learning/bsv-academy/introduction-to-bitcoin-script/chapter-1-about-bitcoin-script/06-nlocktime.md).
# 06 - nLockTime
`00000000`
The final element of the transaction is its nLockTime. nLockTime is the second part of setting up payment channels.
{% file src="/files/dM9mDaRB8QlJgFCQg3gv" %}
Payment channels are a highly useful tool and a native element of the Bitcoin protocol.
When a transaction's nLockTime is in the future, it can be considered non-final if there are also inputs with non-final nSequence values. In this particular transaction, the nLocktime is set to 0x00000000 meaning that the field references block 0 and the transaction is final at any time.
In the above animation it can be seen that the transaction is not final until either the nSequence field is UINT\_MAX or the nLockTime passes which then overrides the fact that the nSequence UINT has not been incremented to its MAX value.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/introduction-to-bitcoin-script/chapter-1-about-bitcoin-script/06-nlocktime.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
