How them being expensive to generate make them less likely to be reorged? Would an op_return output used as a nonce to make the hash of the transaction contain some proof of work make the non-coinbase expirable transaction more secure against reorgs?
I'm afraid your point is irrelevant.
On Thursday, September 17, 2015 7:14:38 PM Jorge Timón via bitcoin-dev wrote:
> As Mark points out this can be made safe by requiring that all the outputs
> of a transaction that can expire have op_maturity/csv/rcltv of 100. That
> makes them as reorg-safe as coinbase transactions.
Not quite as safe. Remember that mined bitcoins have not only a 100-block
maturity requirement, but *also* are expensive to generate.
Mere OP_CHECKMATURITYVERIFY (aka rcltv) has no cost to use...
Luke