<p><a href="https://lists.linuxfoundation.org/pipermail/lightning-dev/2019-December/002362.html" rel="nofollow noreferrer">Anthony Towns' recent draft</a> uses CLTV, which <a href="https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki#summary" rel="nofollow noreferrer">also uses nLocktime</a>.</p>

CC BY-SA 4.0
2019-12-16T18:31:03.743Z
2019-12-16T18:31:03.743Z
Janus Troelsen
<p>The Eltoo paper says "Notice that we could use nSequence for this purpose, but due to the interplay with OP_CSV we opted to use nLocktime". Now that <a href="https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2018-December/016574.html" rel="nofollow noreferrer">Lau showed CSV not to be necessary</a>, does that mean that there is also no reason to use nLocktime?</p>

<lightning-network><locktime><checksequenceverify><eltoo>
Are both CSV and nLocktime unnecessary in Eltoo?
Janus Troelsen
# Are both CSV and nLocktime unnecessary in Eltoo?

(Asked by: username_0 on 2019-12-16)

The Eltoo paper says "Notice that we could use nSequence for this purpose, but due to the interplay with OP\_CSV we opted to use nLocktime". Now that [Lau showed CSV not to be necessary](https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2018-December/016574.html), does that mean that there is also no reason to use nLocktime?

**Tags:** lightning-network, locktime, checksequenceverify, eltoo


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## 1 answers

### Answer by username_0 on 2019-12-16. Score: 1 | Accepted answer

[Anthony Towns' recent draft](https://lists.linuxfoundation.org/pipermail/lightning-dev/2019-December/002362.html) uses CLTV, which [also uses nLocktime](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki#summary).


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