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: 

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@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.

I just want to know if OP_CHECKSEQUENCEVERIFY can be used to achieve the above.

Thank you.

Praveen

ᐧ

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