On Friday 14 May 2021 21:41:23 Michael Fuhrmann via bitcoin-dev wrote: > Bitcoin should create blocks every 10 minutes in average. So why do > miners need to mine the 9 minutes after the last block was found? It's > not necessary.
It increases security, and is unavoidable anyway. > Problem: How to prevent "pre-mining" in the 9 minutes time window? You can't. > Possible ideas for discussion: > > - (maybe most difficult) global network timer sending a salted hash time > code after 9 minutes. this enables validation by nodes. PoW *is* the global network timer. > - (easy attempt) mining jobs before 9 minutes have a 10 (or 100 or just > high enough) times higher difficulty. so everyone can mine any time but > before to 9 minutes are up there will be a too high downside. It is more > efficient to wait then paying high bills. The bitcoin will get a "puls". There's no timestamp at this stage of consensus. On Sunday 16 May 2021 18:10:12 Karl via bitcoin-dev wrote: > The clock might be implementable on a peer network level by requiring > inclusion of a transaction that was broadcast after a 9 minute delay. That requires a centralised authority. On Sunday 16 May 2021 20:31:47 Anton Ragin via bitcoin-dev wrote: > 1. Has anyone considered that it might be technically not possible to > completely 'power down' mining rigs during this 'cool-down' period of time? > While modern CPUs have power-saving modes, I am not sure about ASICs used > for mining. That would be miners' problem, not the network's... New ASICs would no doubt be made to work more efficiently. > 2. I am not a huge data-center specialist, but it was my understanding that > they charge per unit of installed (maximum) electricity consumption. It > would mean that if the miner needs X kilowatts-hour within that 1 minute > when they are allowed to mine, he/she will have to pay for the same X for > the remaining 9 minutes - and as such would have no economic incentive not > to draw that power when idling. Actually, this would be a good thing: it would heavily discourage datacentre use (which is very harmful to mining decentralisation). > 4. My counter-proposal to the community to address energy consumption > problems would be *to encourage users to allow only 'green miners' process > their transaction.* In particular: >... > (b) Should there be some non-profit organization(s) certifying green miners > and giving them cryptographic certificates of conformity (either usage of > green energy or purchase of offsets), users could encrypt their > transactions and submit to mempool in such a format that *only green miners > would be able to decrypt and process them*. Hello centralisation. Might as well just have someone sign miner keys, and get rid of PoW entirely... _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
