A smart contract called a DeFi liquidity pool binds tokens to guarantee their liquidity on a decentralized exchange. Liquidity providers are users who give tokens to the smart contract. As a new and automated method of addressing the liquidity dilemma on decentralized exchanges, DeFi liquidity pools have arisen. They take the place of the traditional order book approach, which was directly adapted from the established financial markets and is employed by centralized crypto exchanges. How does a liquidity pool work?
According to this model, the exchange acts as a market place where buyers and sellers can interact and determine asset prices based on relative supply and demand. However, for this model to work, there must be a sufficient number of buyers and sellers to generate liquidity . In order to maintain fair prices, market makers play a crucial role in ensuring that there is always someone available to meet demand.
The fundamental model has failed to function as a decentralized exchange. Ethereum's high gas costs and lengthy block times deter market makers, which leaves little liquidity for DEXs' attempts to imitate the order book paradigm. As a result, liquidity pools—which provide continuous, automatic liquidity for decentralized trading platforms—have emerged as the preferred option in decentralized finance.
A DeFi liquidity pool's most basic form stores two tokens in a smart contract to create a trading pair.
As an example, let's utilize Ether (ETH) and USD Coin (USDC), where the price of ETH can be expressed as 1,000 USDC. A deposit of one ETH would need to be matched by one thousand USDC since liquidity providers put an equal amount of ETH and USDC into the pool.
Due to the pool's liquidity, users can trade ETH for USDC immediately using the cash they have placed, rather than having to wait for a counterparty to match their order.
Providers of liquidity are rewarded for their contributions. A fresh token, known as a pool token, reflecting their investment is given to them when they make a deposit. The pool token in this illustration would be USDCETH.
All liquidity providers automatically receive a percentage of the trading fees paid by customers who utilize the pool to swap tokens in proportion to the level of their stake. Therefore, if a liquidity provider provided 10% of the pool and the trading costs for the USDC-ETH pool are 0.3%, they are entitled to 10% of the 0.3% total value of all trades.
Burning their pool tokens enables users to withdraw their stake in the liquidity pool when they want to.
The most obvious advantage of liquidity pools is that they provide traders who desire to use decentralized exchanges with a nearly constant source of liquidity. Additionally, they provide the chance to generate money from cryptocurrency investments by acting as a liquidity provider and collecting transaction fees.
To ensure that their token pools remain sizable and minimize the danger of slippage and improve the trading experience, several projects and protocols will also provide additional incentives to liquidity providers. As a result, there is a chance to increase profits from yield farming reward tokens in exchange for providing liquidity.
Some protocols, like Uniswap, Balancer, and Yearn.finance, pay liquidity providers in the platform tokens associated with those protocols. This concept was utilized by SushiSwap to assault Uniswap in a so-called "vampire attack" when it first appeared in the summer of 2020. By supplying liquidity on Uniswap before SushiSwap launched and afterwards migrating the liquidity to the SushiSwap platform, which was also a fork of Uniswap's technology, users could farm the SUSHI coin.
According to the platform, the specific steps for joining DeFi liquidity pools may differ. Typically, one would need to create an account on the platform of choice before connecting an Ethereum wallet from the homepage, such as MetaMask or another Web 3.0 wallet. Tokens can then be deposited into the appropriate liquidity pool after that.
