EYWA is a system that allows various ecosystems of blockchains to interact with each other. We provide a possibility for users to quickly and cheaply move their assets among different networks, and for developers to effectively implement cross-chain logic for their decentralized applications. The core architectural element of the EYWA ecosystem is the EYWA Cross-chain Data Protocol, which is a transport layer among blockchains. All EYWA products for the DeFi users are based on this protocol.