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From: Rusty Russell <rusty@rustcorp.com.au>
To: Peter Todd <pete@petertodd.org>, bitcoin-development@lists.sourceforge.net
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Subject: Re: [Bitcoin-development] CLTV opcode allocation; long-term plans?
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Peter Todd <pete@petertodd.org> writes:
> That said, if people have strong feelings about this, I would be willing
> to make OP_CLTV work as follows:
>
>     <nLockTime> 1 OP_CLTV
>
> Where the 1 selects absolute mode, and all others act as OP_NOP's. A
> future relative CLTV could then be a future soft-fork implemented as
> follows:
>
>     <relative nLockTime> 2 OP_CLTV

Mildly prefer to put that the other way around.

ie. the OP_NOP1 becomes OP_EXTENSION_PREFIX, the next op defines which
extended opcode it is (must be a push).

Cheers,
Rusty.