Secure on-chain object delivery

Let's consider another example where the object (i.e., the product) is already represented as a blockchain asset. In this scenario, ensuring guarantees and the security of object delivery becomes much easier. In this case, we still have smart contract Y, which facilitates the exchange of tokens T for T`1. Additionally, smart contract Y receives call data D and the address of smart contract M. Here, M represents the merchant's smart contract, which is ready to process the payment and promptly provide the service.

In this situation, the integration of the object into the blockchain adds an extra layer of security and transparency to the entire process. By leveraging the inherent features of blockchain technology, such as immutability and decentralized consensus, the integrity of the transaction and the delivery of the object can be ensured. The smart contract Y acts as a trusted intermediary, handling the token exchange and verifying the fulfillment of the conditions set by the merchant's smart contract M.

Let:

• Y signifies the smart contract that exchanges tokens T → T`1.

• M denotes the address of the merchant's smart contract.

• D represents the smart contract call data for the M.

The interaction process can be represented as:

$$Y(T,T1,D,M) → M(T1,D)$$