Important to note is that Nano isn't really a DAG, but rather a block lattice - essentially every account has it's own chain of transactions that are verified b

Important to note is that Nano isn't really a DAG, but rather a block lattice - essentially every account has it's own chain of transactions that are verified by nodes. Additionally, each transaction is actually two, a 'send' and a 'receive', each mentioning the other address, amount, and preceding block to prevent double sends/receives. The only problem in this article shared with Nano is the ability to spam the network, but there is a small PoW associated with each transaction to slow this down.