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Contract Call Remove Liquidity

A practical guide to removing liquidity from a StableSwap 3 pool. This lesson explains the process of withdrawing liquidity from a pool by calling the 'remove_liquidity' function and demonstrates how the contract calculates the amount of tokens returned to the user in proportion to the burned LP shares.

Course Overview

About the course

What you'll learn

AMM math for Curve Stableswap

How to calculate swap amount and liquidity

Curve Stableswap contracts

How to implement a swap function

How to implement the add and remove liquidity functions

How to quantify liquidity pools

How to control the flatness of the curve

Course Description

Who is this course for?

Software Engineers
Financial Analysts
Web3 Developers
Smart Contract Security Researchers

Potential Careers

Smart Contract Engineer

$100,000 - $150,000 (avg. salary)

Blockchain Financial Analyst

$100,000 - $150,000 (avg. salary)

Smart Contract Auditor

$100,000 - $200,000 (avg. salary)

Meet your instructors

Tasuku Nakamura

Founder at smartcontract.engineer

Smart contract engineer and educator.

Last updated on November 27, 2024

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Solidity Developer

Curve Stableswap

Section 1: Overview

Duration: 14min

Section 2: Math

Duration: 32min

Section 3: Contract Overview

Duration: 26min

Section 4: Swap

Duration: 23min

Section 5: Add Liquidity

Duration: 20min

Section 6: Remove Liquidity

Duration: 23min

1. Contract Call Remove Liquidity

2. Code Outline Remove Liquidity

A detailed walkthrough of the removeLiquidity function - Learn the step-by-step process of removing liquidity, including calculating token amounts, updating token balances, transferring tokens out, and burning LP shares. Duration: 0min

3. Contract Call Remove Liquidity One Coin

A technical guide to removing liquidity from a StableSwap3Pool. The lesson covers the differences between `removeLiquidity` and `removeLiquidityOneCoin` functions, including burning LP shares, receiving a single token, and the calculation of the amount of the specific token received by the user. Duration: 1min

4. Code Outline Remove Liquidity One Coin

A detailed explanation of the remove_liquidity_one_coin function - This lesson outlines the steps involved in the remove_liquidity_one_coin function, including calculating liquidity amounts, burning LP shares, and transferring tokens out. Duration: 1min

5. Code Walkthrough Remove Liquidity

A detailed explanation of how to remove liquidity from a Curve pool. This lesson covers the different ways to remove liquidity, how to calculate the amount of tokens to be returned to the caller, and how to emit an event to indicate that liquidity has been removed. Duration: 2min

6. Graph Calculate Withdraw One Coin

A visual explanation of how the remove liquidity one coin function works on Curve. The lesson uses a geometric approach with the help of Desmos to demonstrate the effect of removing liquidity in a single token on the token balances of an AMM. Duration: 4min

7. Code Walkthrough Remove Liquidity One Coin

A technical guide to understanding the ‘removeLiquidityOneCoin’ function in Solidity. The lesson focuses on how this function enables users to withdraw liquidity from a stable swap pool for a specific token, taking into account the imbalance fee and updating token balances. Duration: 2min

8. Code Walkthrough Calculate Withdraw One Coin

A detailed explanation of the calc_withdraw_one_coin function for stable swap pools. This lesson covers the purpose of the function, how it calculates the amount of tokens you will receive, and how it accounts for fees. Duration: 6min

9. Exercise 1: Remove Liquidity

A practical guide to removing liquidity from Curve.fi - The lesson demonstrates how to remove liquidity from Curve pools, with step-by-step instructions on interacting with the removeLiquidity function and understanding the minimum amount of coins expected. Duration: 1min

10. Solution 1: Remove Liquidity

A practical guide to removing liquidity from Curve.fi’s AMM. The lesson demonstrates two methods: removing all liquidity at once and removing liquidity for a single stablecoin. Duration: 3min

11. Exercise 2: Remove Liquidity One Coin

A practical guide to removing liquidity from a Curve pool - This lesson focuses on how to use the ‘remove liquidity one coin’ function of the Curve StableSwap3Pool. You'll learn how to use this function to remove liquidity from a pool and withdraw your coins. Duration: 1min

12. Solution 2: Remove Liquidity One Coin

A practical Solidity exercise on removing liquidity from a Curve pool - The lesson demonstrates how to call the remove_liquidity_one_coin function to withdraw a single stablecoin (DAI) from a 3pool, while also showcasing the expected outputs for the other stablecoins in the pool (USDC and USDT). Duration: 1min