Collateral
Collateral refers to the assets that a borrower locks into a smart contract to secure a loan within a decentralized lending platform. Because DeFi protocols lack traditional credit scoring systems, they require assets of significant value to be deposited as security. If the borrower fails to meet the repayment terms or if the value of their collateral drops significantly, the protocol triggers a liquidation process to recover the debt and maintain the protocol's solvency.
Explain Like I'm 12
Collateral is a 'safety deposit' you put up. If you want to borrow something, you show the system you have something equally or more valuable to leave behind. It acts as a backup plan to ensure the lender doesn't lose money.
Why It Matters
Collateral is the mechanism that replaces the trust-based credit systems of traditional finance. It allows for permissionless lending, ensuring that protocols remain solvent even if a borrower defaults.
How It Works
The user deposits supported tokens into a smart contract. The contract monitors the value of the collateral against the borrowed amount. If the price of the collateral falls toward the debt value, the contract allows third-party 'liquidators' to seize and sell the collateral to pay off the debt.
Real-World Example
Compound, which requires users to deposit tokens to mint or borrow other assets against their supplied security.
Advantages
- Enables permissionless lending
- Secures the protocol's solvency
- Eliminates credit checks
Limitations
- Risk of forced liquidation
- Requires significant upfront capital
- Price volatility exposure
Common Misconceptions
- Many think collateral is lost forever when you borrow.
- People often mistake the loan value for being equal to the collateral value.
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Related Terms
Borrowing
Borrowing in DeFi is the process of acquiring capital by providing collateral to a decentralized lending protocol. Users lock crypto assets into a smart contract to receive a loan in another asset. These protocols are typically over-collateralized, meaning the value of the deposited assets must exceed the value of the borrowed loan. This system allows users to leverage their positions or gain liquidity without having to sell their underlying assets.
Lending
Lending in DeFi refers to the practice of depositing cryptocurrency assets into a protocol so that others can borrow them, in exchange for earning interest. These decentralized lending protocols operate through smart contracts that automatically manage supply, demand, interest rates, and loan security. By providing liquidity to these pools, users become lenders and can earn a yield on their idle capital, which is paid by borrowers who use the funds.
Liquidation
The forced sale or seizure of collateral when a borrowing position no longer meets required collateralization.
Smart Contract
A smart contract is a self-executing program stored on a blockchain that automatically runs when predetermined conditions are met. These contracts eliminate the need for intermediaries by encoding terms directly into lines of code, ensuring that the agreement is enforced exactly as written without human interference. Because they reside on an immutable ledger, the execution results are verifiable, transparent, and impossible to tamper with once deployed.
Smart Contract
A self-executing program stored on a blockchain that automatically enforces and executes the terms of an agreement when predetermined conditions are met. Smart contracts are deterministic, immutable once deployed, and form the backbone of decentralized applications.