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What Do Flash Loans Mean in DeFi?

Decentralized Finance or DeFi is relatively a new concept to most people. As a matter of fact, cryptocurrency seems to have introduced so many terms to the world and DeFi is one of them. If you are building your cryptocurrency business, you need to know the various options available to you.

Flash loans are a resource that both crypto traders and investors need to pay attention to. Let us look at this concept of flash loans and what they are all about.

What are Flash Loans?

You must have realized that cryptocurrency strives to be the same as conventional currency. With flash loans, traders are allowed to borrow cryptocurrency from the crypto pool, using smart contracts. When borrowing this type of loan, it is imperative to note once you borrow, you should make repayments on the same blockchain network. Flash loans were introduced by Marble Protocol, where users had an avenue for borrowing ERC-20 and Ether tokens. Marble Bank would lend traders so that they would buy tokens from one decentralized exchange and sell it to another.

The sale would bring in some profits and then the borrower would repay the loan and remain with the profit realized from the arbitrage profits. All these events would happen on one atomic transaction. DyDx and Aave are some of the other players who have adopted the concept of flash loans of DeFi. While the main purpose of flash loans is to take advantage of the arbitrage openings, they can also be used for other things like self-liquidation and collateral swapping.

Conventional Loans vs. Flash Loans

Most people are familiar with conventional loans which are acquired from banks and other financial institutions. However, flash loans are different from these traditional loans and it is important to understand the difference. Generally, loans, as we know them, come in two different categories; secured loans and unsecured loans. In order to get a secured loan, you will need to provide collateral as security for the loan. Unsecured loans, on the other hand, are riskier as lenders give out funds with no security. Now, with flash loans, they are unsecured but are designed in a way that they are paid back immediately on the same transaction. Let us look at this in detail.

How Flash Loans Work

If you are a trader on, there are certain things that you must take note of. When there is a transaction of Ethereum, it is a representation of various operations, which will be completed in a single atomic way. What this means is the operations in the transaction will all be executed at a go in a simultaneous manner. If any of the operations does not execute, the whole transaction is reversed. This is a system that has been set in such a way that ensures flash loans are repaid instantly.

With that understanding, you can take advantage of flash loans and attempt to execute one. The first thing you will need is to find a reliable flash loan service provider like Aave or DyDx. These are providers with smart contracts and will allow you to borrow crypto assets, which are repaid on the same transaction. Consider the transaction fees and the interest fees that you will need to pay for the flash loan.


Flash loans are a new concept to many people and seem to be gaining traction. This will certainly set the stage for new possibilities when it comes to unsecured loans. The decentralized finance ecosystem is truly opening up new concepts and ideas through cryptocurrency. You can now use flash loans to trade and make profits with digital assets.