The problem vault-circle solves

The problem it solves

VaultCircle simplifies collective yield generation in DeFi.
It allows small groups or communities to pool assets into shared on-chain vaults that automatically earn yield through trusted strategies like Morpho, Yearn on Katana.

Each vault is:

• Fully on-chain and transparent
• Linked to ERC4626-compliant strategies
• Able to donate part of its yield to a chosen address

This makes group savings, social investing, or donation-based yield farming safer and easier to coordinate. The vault abstracts away complex interactions, enabling users to earn and contribute collectively without manual management.

Challenges I ran into

Testing on Tatara required deterministic factory deployments, but the strategies referenced non-existent vaults, causing reverts on “call to non-contract address.”

To fix this:

• Mock ERC20 tokens and mock Katana vaults were built to simulate real yield flow.
• Modular deployment scripts were written for smooth sequential deployment.
• Parameterized runbooks ensured repeatable factory-strategy linking.

This mock-driven approach allowed the entire system to run cleanly on isolated testnets while keeping deployments predictable and composable.