I'd be interested to know more about your proposal to solve the precomputed work attack vector. Also, I think if you can easily create an attack that would DDOS network, you should absolutely try it on the Nano test net. That's what the test net is there for. To my knowledge, the precomputed spam attack has been mitigated by the Dynamic PoW feature that was added in v19. See my other reply with more details on that. I would like to know more about your proposal. You can email me at purplewumpus@protonmail.com
I simply do not have the time nor motivation to conduct an attack on the Nano testnet. I've responded to your other reply with the technical shortcomings of the mitigation, my proposal is still open somewhere in github's issues but I've since moved on from cryptocurrency as a whole.
