Hi All, I’ve now built the same little Alice/Bob/Carol channel three times. First with 

, so I ran it again using the scripts from 

This time I published an old state on purpose, then let a newer update replace it. I signed U3 before any state output existed.

bitcoin

> *by* [**AaronZhang**](https://delvingbitcoin.org/u/aaronzhang)
>
> Hi All, I’ve now built the same little Alice/Bob/Carol channel three times. First with [APO+CTV](https://delvingbitcoin.org/t/eltoo-state-chain-on-signet-three-rounds-six-transactions-apo-ctv/2413), then with a [CSFS+CTV rekey ladder](https://delvingbitcoin.org/t/eltoo-state-chain-on-signet-again-three-rounds-two-transactions-csfs-ctv-with-rekey-and-ladder-no-cat/2430). Inquisition 29.4 turned on [`OP_TEMPLATEHASH`](https://delvingbitcoin.org/t/bitcoin-inquisition-29-4/2739), so I ran it again using the scripts from [@instagibbs](https://delvingbitcoin.org/u/instagibbs)’ [`2026-01-eltoo_th`](https://github.com/instagibbs/bolts/tree/2026-01-eltoo_th) BOLT draft.
>
> ```
> update(n) = TEMPLATEHASH INTERNALKEY CSFS VERIFY <500000000+n> CLTV   # 10 B
> settle(n) = TEMPLATEHASH \<hash> EQUAL                                 # 35 B
> ```
>
> This time I published an old state on purpose, then let a newer update replace it. I signed U3 before any state output existed.
>
> [**...read more at delvingbitcoin.org**](https://delvingbitcoin.org/t/eltoo-state-chain-on-signet-third-time-templatehash-csfs-internalkey/3012)