A block-tree would be append only. The blockchain is a block-tree + a canonical leaf (or a head) which is a mutable variable. https://medium.com/@arthurb/what-

A block-tree would be append only. The blockchain is a block-tree + a canonical leaf (or a head) which is a mutable variable. https://medium.com/@arthurb/what-do-blockchains-accomplish-e9a5efa246bf https://medium.com/@arthurb/what-do-blockchains-accomplish-e...