On Wednesday, July 20, 2016 5:46:54 AM Peter Todd via bitcoin-dev wrote: > On Tue, Jul 19, 2016 at 10:35:39PM -0600, Sean Bowe via bitcoin-dev wrote: > > I'm requesting feedback for Hash Time-Locked Contract (HTLC) transactions > > in Bitcoin. > > > > HTLC transactions allow you to pay for the preimage of a hash. CSV/CLTV > > can be used to recover your funds if the other party is not cooperative. > > These > > > > scripts take the following general form: > > [HASHOP] <digest> OP_EQUAL > > OP_IF > > > > <seller pubkey> > > > > OP_ELSE > > > > <num> [TIMEOUTOP] OP_DROP <buyer pubkey> > > > > OP_ENDIF > > OP_CHECKSIG > > Note that because you're hashing the top item on the stack regardless > scriptSig's that satisfy HTLC's are malleable: that top stack item can be > changed anything in the digest-not-provided case and the script still > passes.
OP_SIZE OP_IF [HASHOP] <digest> OP_EQUALVERIFY <seller pubkey> OP_ELSE <num> [TIMEOUTOP] <buyer pubkey> OP_ENDIF OP_CHECKSIG _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev