Blockchain is a developing and promising technology that can provide users with such advantages as decentralization, data security and transparency of transactions. Blockchain has many applications, one of them is the decentralized finance (DeFi) industry which is growing more and more recently. The concept of decentralized finance involves the creation of a single ecosystem of many blockchains that interact with each other. The problem of combining and interacting blockchains becomes crucial to enable DeFi. In this paper, we look at the essence of the DeFi industry, the possibilities of overcoming the problem of cross-blockchain interaction, present our approach, and analyze the results of the proposed solution.