On Mon, Aug 01, 2022 at 01:19:05PM +0000, aliashraf.btc At protonmail wrote: > > On Sat, Jul 30, 2022 at 05:24:35PM +0000, alicexbt via bitcoin-dev wrote: > > like a hashcash-based alternative broadcast scheme. > Hi Peter, > I've been mulling the idea of attaching work to low fee txns, both as a > compensation (e.g., in a sidechain, or an alt), and/or as a spam proof. > Unfortunately, both suffer from ASICs: > For spam proof case, the adversary can easily buy a used/obsolete device to > produce lots of spam txns very cheaply, unless you put the bar very high, > making it almost impossible for average users to even try. > The compensation scenario is pretty off-topic, still, interesting enough for > 1 min read: > Wallets commit to the latest blockchain state in the transaction AND attach > work. > It is considered contribution to the security (illegitimate chains can't > include the txn), hence isrewarded by fee discount/exemption depending on the > offset of the state they've committed to (the closer, the better) and the > amount of work attached. > For this to work, block difficulty is calculated inclusive with the work > embedded in the txns, it contains. Sophisticated and consequential, yet not > infeasible per se. > > Unfortunately, this scheme is hard to balance with ASICs in the scene too, > for instance, you can't subsidize wallets for their work like with a leverge, > because miners can easily do it locally, seizing the subsidies for > themselves, long story, not relevant just ignore it.
We're not talking about a consensus system here. Just a way to rate-limit access to a broadcast network used by a small minority of nodes. It's completely ok to simply change the PoW algorithm in the _highly_ unlikely event someone bothers to build an ASIC for it. Since this isn't a consensu system, it's totally ok if multiple versions of the scheme run in parallel. -- https://petertodd.org 'peter'[:-1]@petertodd.org
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