Overview

Uniswap v2 exists as a decentralized alternative to traditional order book exchanges, which require a “coincidence of wants” and centralized intermediaries to match buyers and sellers.

Traditional on-chain order books face significant economic inefficiencies due to the high gas costs associated with creating, canceling, or fulfilling individual orders on a blockchain.

The protocol addresses these inefficiencies by using Liquidity Pools, allowing users to trade against a smart contract rather than a specific counterparty.

Evolution from Uniswap V1

Furthermore, v2 improves upon v1 by removing the “ETH bridge” requirement, allowing for arbitrary ERC-20/ERC-20 pairs.

This reduces costs for liquidity providers (LPs) who previously suffered mandatory exposure to ETH and allows for highly correlated pairs (like stablecoin pairs) to trade with minimal price impact and lower risk of impermanent loss.