• Block, a digital payments firm co-founded by Jack Dorsey, finished developing a three-nanometer Bitcoin mining chip.
• Block is ultimately working toward offering standalone Bitcoin mining chips and its own full mining system.

https://www.theblock.co/post/290547/jack-dorseys-block-develops-3-nanometer-bitcoin-mining-chip-aims-for-own-mining-system#:~:text=Block%2C%20a%20digital%20payments%20firm,its%20own%20full%20mining%20system.