Most public blockchains are not sustainable because they grow indefinitely. This is especially a problem in smart contract platforms, where transaction fees are not necessarily commensurate with the true value of the confirmation of a transaction, or with the total cost of storage amongst the network of validators.
For increased predictability and long-term sustainability, Findora will employ consensus rules that charge fees for ongoing storage. An upper bound on the size of the ledger state, adjusted by Findora governance, will bake in fundamental guarantees. Just as users pay for transaction processing, users will also pay to keep accounts, state commitments by side ledgers, and arbitrary data accessible.