What is Swap (Crypto)

A crypto swap is the direct exchange of one cryptocurrency for another — through a centralised exchange's trading engine, a decentralised exchange's automated market maker (AMM), or a cross-chain bridge protocol. Swaps are the most fundamental DeFi action: the primitive from which lending, yield strategies, and arbitrage are built. SWAP ON A CENTRALISED EXCHANGE On Binance or CoinDCX, swapping ETH for SOL means: the exchange matches your order against the order book, takes a spread or fee, and credits SOL to your account. You don't interact with any blockchain directly — the exchange holds custody and handles all settlement internally. SWAP ON A DECENTRALISED EXCHANGE (AMM) DEX swaps use liquidity pools — smart contracts holding two tokens that anyone can trade against algorithmically. Uniswap's constant product formula (x × y = k) ensures the pool maintains equal value on both sides. When you swap ETH for USDC: your ETH enters the pool, USDC exits, price adjusts based on the new ratio. You receive slightly less than quoted due to price impact and the 0.3% pool fee going to liquidity providers. DEX AGGREGATORS DEX aggregators (1inch, Jupiter on Solana, CowSwap) route swaps across multiple pools to find optimal execution. A $100,000 ETH→USDC swap on a single pool causes significant price impact. An aggregator might split it across Uniswap V3, Curve, and Balancer — minimising slippage. CROSS-CHAIN SWAPS Moving assets between blockchains (ETH to Solana) requires a bridge. Bridges lock assets on the source chain and mint equivalent wrapped tokens on the destination. Bridge protocols: Stargate, LayerZero, Wormhole, Synapse. Cross-chain bridge security is critical — bridges have been sources of the largest crypto hacks ($600M Ronin Bridge, $320M Wormhole).

Terms in addition to the Swap (Crypto)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.