What is a DEX?
The Complete Decentralized Exchange Guide
A decentralized exchange (DEX) lets you swap crypto tokens directly from your wallet — no intermediaries, no sign-ups, no giving up control of your funds. Learn how DEXs work, why they matter, and how to get started trading on one today.
DEX vs CEX: Side by Side
How do decentralized exchanges compare to centralized exchanges like Coinbase or Binance?
| Feature | DEX | CEX |
|---|---|---|
| Custody | You hold your keys | Exchange holds your funds |
| KYC Required | No | Yes |
| Transparency | Fully on-chain | Opaque, trust-based |
| Downtime Risk | Runs 24/7 on-chain | Can halt withdrawals |
| Censorship | Censorship-resistant | Can freeze accounts |
| Trading Fees | Low + gas fees | Variable, often hidden |
Benefits of Non-Custodial Trading
True Ownership
Your tokens never leave your wallet until the swap executes. No deposits, no custodial risk, no frozen accounts.
Permissionless Access
Anyone with a wallet can trade. No sign-ups, no KYC, no geographic restrictions. DeFi is open to everyone.
Full Transparency
Every trade, every fee, every liquidity pool is verifiable on-chain. No hidden order books or wash trading.
No Counterparty Risk
Smart contracts execute trades automatically. No risk of an exchange going bankrupt and losing your funds.
How DEX Aggregators Find the Best Prices
A DEX aggregator scans multiple decentralized exchanges and liquidity pools simultaneously to find you the best swap rate. Instead of manually checking Uniswap, SushiSwap, and other protocols, an aggregator does the work for you in milliseconds.
1. Scan
Queries all available liquidity sources on the network
2. Route
Splits your trade across pools for the optimal price
3. Execute
Completes the swap in a single transaction from your wallet
Hayzoom acts as a DEX aggregator on Base L2, ensuring you always get the best available price across all liquidity sources — without manually checking each protocol yourself.
Why Base L2 Has Low Gas Fees
Base is a Layer 2 (L2) network built on top of Ethereum. It processes transactions off the main Ethereum chain, then batches them together and submits proofs back to Ethereum L1 for security.
This architecture means you get the security guarantees of Ethereum with dramatically lower costs. While a simple swap on Ethereum mainnet can cost $5–$50 in gas fees, the same swap on Base typically costs less than $0.01.
100x
Cheaper than Ethereum mainnet
2 seconds
Average transaction confirmation
Key Terms to Know
Liquidity
The total amount of tokens available in a trading pool. Higher liquidity means less price impact when you swap.
Slippage
The difference between the expected price of a trade and the actual execution price. Occurs when market conditions change between quote and execution.
Gas Fees
The transaction fee paid to validators for processing your swap on the blockchain. On Base L2, gas fees are typically under $0.01.
Price Impact
How much your trade moves the market price. Larger trades relative to pool liquidity have higher price impact.
AMM (Automated Market Maker)
The algorithm that determines token prices in a liquidity pool. AMMs replace traditional order books with mathematical formulas.
Token Approval
A one-time permission you grant to a smart contract to spend a specific token from your wallet. Required before your first swap of each token.
Start Trading on Hayzoom
The non-custodial DEX on Base — swap tokens with the best prices, lowest fees, and full control of your assets.
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