Quote from: CIYAM on December 30, 2015, 04:27:43 PM

So far I have now come up with the following P2SH template:

76a82087637576a91488ac6703b17576a91488ac68

which can be better understood as this:

Code:

OP_DUP
OP_SHA256

OP_EQUAL
OP_IF
OP_DROP
OP_DUP
OP_HASH160

OP_EQUALVERIFY
OP_CHECKSIG
OP_ELSE

OP_NOP2
OP_DROP
OP_DUP
OP_HASH160

OP_EQUALVERIFY
OP_CHECKSIG
OP_ENDIF

Noting that:
is the SHA256 hash of the "secret"
is the public key hash for the "reveal secret" redeem script
is the block number for a CLTV refund to occur at and
is the public key hash for the "CLTV refund" redeem script

The lengths of things being pushed onto the stack has been hard-coded in this template which is fine for the hashes but would not be fine if you changed to instead be a timestamp (something I'll be looking into a little later).

I was trying to add another branch of OP_ELSE to mimic Gmaxwell's CoinSwap but I don't really know how to skip the previous OP_ELSE and run the next OP_ELSE. Do you know how to do it?