• Since every node is not allowed to validate every transaction, we somehow need nodes to have a statistical and economic means to ensure that other blocks are secure.
• There must be some way to guarantee data availability.
• Transactions need to be processed by different nodes in parallel in order to achieve scalability. However, transitioning state on the blockchain also has several non-parallelizable (serial) parts, so we’re faced with some restrictions on how we can transition state on the blockchain while balancing both parallelizability and utility.

Blockchain rent is a solution that aims to reduce the amount of data that is stored on the network in order to help speed up transaction times.

With Ethereum, users pay for computational steps, memory, transaction logs, and permanent storage. While most of these are resour...