This private blockchain system provides independent secure data-exchange and payment channels for a total support of robot - centric logistics. The SKYFChain Operating Platform will based on private blockhain. It will use ERC20 compatible protocol for SKYFT tokens and build payment channels for exchange transactions. SKYFchain is unique because it will be designed to exclude the human as an intermediary and it will have access to confirmed clients of the first industrial heavy duty cargo drone – the SKYF drone, which is already flying. Technically, the main purpose of the SKYFchain is to integrate critical information for all market participants and organize execution of smart-contracts for transactions. SKYFchain aims to create the whole new industry of airborne cargo drones and later invite groundborne and sea-borne cargo robots for the new business opportunities.

The Singapore company Tangem released bitcoin-bills, which the developers themselves call "smart banknotes."  However, they are not made of paper - in fact it is hardware cold wallets with an integrated S3D350A chip from Samsung.  At the same time, the novelty has common features with traditional banknotes.  So, each bitcoin-bill represents a certain fixed denomination in BTC and can be transferred physically for payment.  In the company itself Tangem development is called "uncoolable cold wallet."