Weak blocks: propagate stuff with low PoW as you are building it

• use cases / why you wouldn’t hear of stuff
  • nonstandard to you
  • somehow didn’t propagate to you
  • miner’s prioritisetransaction stuff with no fees
• why is this coming up now?
  • more mempool heterogeneity
  • “accelerate nonstandard transactions” services
• poc code: submits to mempool, rejected ones are stored in separate cache

Questions

• why would a miner do this? (similar to compact blocks?)
• add to mempool?
• what if invalid/nonstandard?
• good for fee estimation
• why didn’t we do weak blocks before, years ago?
  • some of it was pre-compact blocks