Chapter 12

Composability

Composability means DeFi protocols can plug into each other like financial Lego blocks. A wallet, DEX, lending market, oracle, and automation layer can all participate in one user action or one smart contract strategy.

This is why innovation can move quickly in open systems. Developers do not need to rebuild every primitive from scratch when they can call trusted building blocks that already exist on-chain.

The strategy works because each protocol exposes reusable functions. One contract can borrow from one system, trade through another, and settle back into the first without a human manually coordinating each step.

Composability is a core strength of DeFi, but it also creates chains of assumption. The more layers a strategy touches, the more carefully users need to think about contract risk, liquidity, and unexpected interactions.