Daniel Robinson [ARCHIVE] on Nostr: 📅 Original date posted:2018-02-20 📝 Original message:Yes, although it's a ...

📅 Original date posted:2018-02-20
📝 Original message:Yes, although it's a functionality of Bitcoin Script generally, not OP_CSV
in particular. Bitcoin Script allows you to use nested IF statements, and
enforce whatever different conditions you want in each branch.

Here's your contract in Ivy <https://ivy-lang.org/bitcoin/>;:

contract MultiCSV(
bob: PublicKey,
carol: PublicKey,
bobDelay: Duration,
carolDelay: Duration,
val: Value
) {
clause bobSpend(sig: Signature) {
verify checkSig(bob, sig)
verify older(bobDelay)
unlock val
}
clause carolSpend(sig: Signature) {
verify checkSig(carol, sig)
verify older(carolDelay)
unlock val
}
clause bothSpend(bobSig: Signature, carolSig: Signature) {
verify checkMultiSig([bob, carol], [bobSig, carolSig])
unlock val
}
}

It compiles to the following Bitcoin Script:

PUSH(carolKey) PUSH(bobKey) 2 PICK 2 EQUAL IF ROT DROP 0 4 ROLL 4 ROLL 2
2ROT 2 CHECKMULTISIG ELSE ROT IF DROP CHECKSIGVERIFY PUSH(carolDelay)
CHECKSEQUENCEVERIFY DROP 1 ELSE NIP CHECKSIGVERIFY PUSH(bobDelay)
CHECKSEQUENCEVERIFY DROP 1 ENDIF ENDIF

On Tue, Feb 20, 2018 at 5:32 PM Praveen Baratam via bitcoin-dev <
bitcoin-dev at lists.linuxfoundation.org> wrote:

> Hello Everybody,
>
> I need a little clarity about how OP_CHECKSEQUENCEVERIFY (CSV) works in
> transactions.
>
> Can I use multiple CSV end points as depicted in the figure below? I
> basically want to allow different conditions at different delays.
>
> [image: Multi CSV.png]
>
> I just want to know if OP_CHECKSEQUENCEVERIFY can be used to achieve the
> above.
>
> Thank you.
>
> Praveen
> ᐧ
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev at lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
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