The problem Standard Defi Protocol interfaces solves

1. Show how the ERC4626 standard can be used to integrate different Defi protocols under a common interface. This will make easier composability with different protocols and integration in any Dapp
2. How we can group together portfolios of yield-bearing assets into a Token Bound Account. This is useful to group different tokens with various APR and risk profiles into a single tradable entity.

Challenges I ran into

It was difficult to find existing Defi Projects with publicly available interfaces and code that I could look into and integrate with. To solve it I implemented first a naive "defi" protocol (just linearly accumulating yield in a XRC20) to show how it would be integrated with an ERC4626 Vault, and then I deployed UniswapV3 so I can integrate a ERC4626 to create liquidity positions.