DeFi provides exchange, lending or yield through smart contracts. It can reduce some intermediaries but adds code, oracle, governance, liquidity, bridge, admin-key and signing risks.
Contracts, oracle, liquidity, governance and interface.
Economic loss and technical failure can combine.
Understand every approval before signing.
Map the protocol
Identify contracts, chain, interface, oracle, assets, governance and bridges. A decentralized label can coexist with several privileged controls.
- Official contracts and addresses
- Admin keys and delays
- External dependencies
Understand the source of yield
Yield can come from fees, borrower interest or token issuance. A high rate may compensate for dilution, illiquidity or loss risk.
Measure position risk
A loan can be liquidated, a pool exposes relative asset movements and a stablecoin can depeg. Model a fall, a rise and vanishing liquidity.
- Liquidation threshold
- Loss versus holding
- Slippage and available exit
Limit approvals and exposure
Use a separate wallet, cap amounts and allowances, verify the transaction on the signing device and revoke unused rights. A published audit does not remove risk.
DeFi uses and risks
| Use | Function | Central risk |
|---|---|---|
| DEX | Swap through a pool or order book | Slippage, token and contract |
| Lending | Deposit or borrow | Liquidation, oracle and bad debt |
| Liquidity | Supply assets to a pool | Relative movement and withdrawal |
| Bridge | Move a representation across chains | Validation, custody and contract |
Frequently asked questions
Is an audited protocol safe?
No. An audit covers a scope and point in time without an absolute guarantee.
Does disconnecting remove approvals?
No. An on-chain approval can remain active until revoked.
Why use a separate wallet?
It limits exposure if an interface, signature or contract is compromised.
Verifiable sources
Ethereum.org — Decentralized finance- Ethereum.org — Security and scam prevention
- Ethereum.org — Revoke token approvals
Independent educational content reviewed against primary documentation. No personalized recommendation or promise of returns. Reviewed September 20, 2026