Automated Market Makers (AMM) in Blockchain / Solidity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an Automated Market Maker (AMM)?

An AMM is a smart contract on a blockchain that allows users to trade cryptocurrencies directly without needing a traditional order book. It uses a mathematical formula to price assets.

intermediate

How does the constant product formula work in AMMs?

The constant product formula keeps the product of the two token reserves constant (x * y = k). When one token is bought, its reserve decreases and the other token's reserve increases to keep the product the same.

beginner

What role do liquidity providers play in AMMs?

Liquidity providers add equal value of two tokens to the pool, enabling trades. They earn fees from trades proportional to their share of the pool.

intermediate

What is impermanent loss in AMMs?

Impermanent loss happens when the price of tokens in the pool changes compared to holding them outside. Liquidity providers may lose value compared to just holding tokens.

beginner

Name a popular AMM protocol on Ethereum.

Uniswap is a popular AMM protocol on Ethereum that uses the constant product formula to enable decentralized token swaps.

What does an AMM use to determine token prices?

A A mathematical formula

B A traditional order book

C Manual price setting

D Random number generation

AMMs use mathematical formulas like the constant product formula to set prices automatically.

In the constant product formula x * y = k, what does 'k' represent?

A A fixed constant value

B The product of token reserves

C The trading fee

D The total number of tokens

'k' is the product of the two token reserves and remains constant during trades.

Who earns fees in an AMM?

A Liquidity providers

B Traders only

C Blockchain miners

D Smart contract developers

Liquidity providers earn fees from trades proportional to their share of the pool.

What is impermanent loss?

A Loss from failed transactions

B Permanent loss of tokens due to hacking

C Loss from trading fees

D Loss from token price changes while providing liquidity

Impermanent loss is the temporary loss liquidity providers face when token prices change compared to holding tokens.

Which blockchain is Uniswap built on?

A Solana

B Bitcoin

C Ethereum

D Binance Smart Chain

Uniswap is a decentralized AMM protocol built on the Ethereum blockchain.

Explain how an Automated Market Maker (AMM) enables token trading without an order book.

Think about how prices adjust when tokens are swapped in the pool.

Describe the risks liquidity providers face when adding tokens to an AMM pool.

Consider what happens if token prices move after you add liquidity.