Re: Wall Observer BTC/USD - Bitcoin price movement tracking & discussion

So really all I know is that they intended to "scale" by increasing the blocksize. ... Has anything changed? Are they proposing realistic alternatives to lightning for scaling? Are there new developments that I should be aware of?

0 confirmation transactions. No, seriously - that's the amazing and innovative feature bcash has implemented to try to compete with lightning.

What, did they get some sort of commitment from a federation of miners/pools that when they receive conflicting transactions in their mempool they will mine the one they encountered first rather than the one with the larger fee? That could be done with like 2 lines of code. If it's more interesting than that than I will go do some research.

You mean disabling replace by fee?

Does that mean all I have to do to double spend is send the funds to myself seconds before I send them to the victim?

If the protocol is first transaction gets blockspace, the victim's transaction won't find its way into a block. Double spend will fail, but legitimate RBF transactions could be impossible.

There is no way to know when a transaction was issued. All a big miner can know is when he first saw it and he could share it with all of the other big miners. Then someone who is being paid could reach out to the big miners and ask if they have yet witnessed any conflicting transactions. If the answer is no and the receiver is aware of the miners policy of accepting the first transaction that they encounter in the event of conflicts, the receiver could then relatively reliably trust a 0 confirmation transaction. A degree of centralization in mining would help with this. I am imagining this is what jbreher meant by "bcash has 0 confirmation transactions". If it is than I'm not interested, if it's something else than I am.