Contract Functions

A detailed overview of StableSwap3 Pool Contract functions - The lesson covers the common functions used in StableSwap3 contracts, including exchange, add liquidity, remove liquidity, remove liquidity imbalance, and remove liquidity one coin. It explains how to use these functions for swapping tokens, adding liquidity to the pool, and removing liquidity.

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DeFi Developer Curve Stableswap
1. A Message From Rocket Pool
Learn more about Rocket Pool @ https://rocketpool.net/. Duration: 1min
2. Contract Overview
A technical deep dive into Curve's StableSwap contracts - This lesson explores the intricacies of Curve's StableSwap implementation, focusing on the threePool and steth pools. Learn how the contract design varies based on the number of tokens within a pool and gain a deeper understanding of how to interact with these AMMs. Duration: 3min
3. Contract Functions
A detailed overview of StableSwap3 Pool Contract functions - The lesson covers the common functions used in StableSwap3 contracts, including exchange, add liquidity, remove liquidity, remove liquidity imbalance, and remove liquidity one coin. It explains how to use these functions for swapping tokens, adding liquidity to the pool, and removing liquidity. Duration: 1min
4. How A Affects D
A technical explanation of Curve Stableswap's A parameter and its relationship to liquidity D. The lesson explains the common pattern in Curve Stableswap functions, how an admin can change the A parameter, and how this change impacts the D parameter. Duration: 5min
5. Code Walkthrough A
A detailed exploration of how to handle the A parameter within Curve B1's AMM. The lesson covers the calculation of the A parameter, how the admin can set new values, and the implications of the code within the StableSwap3Pool contract. Duration: 6min
6. Code Walkthrough XP
A simple explanation of a Solidity function to normalize decimals - This lesson explains the importance of consistent decimal representation in smart contracts, then demonstrates how the _xp() function in a DAI-USDC-USDT stable swap pool normalizes token balances to 18 decimals. Duration: 4min
7. Code Walkthrough Get D
A technical explanation of the Solidity function get_D() - The function utilizes Newton’s method to calculate the value D, which represents the liquidity of an AMM pool. It sums up all the token balances, performs iterations of Newton’s method to refine the value of D, and returns the final value D. Duration: 4min
8. Code Walkthrough Get Virtual Price
A comprehensive guide to understanding the get virtual price function in StableSwap. The lesson explains how the function calculates the value of each LP token based on the liquidity of the pool and the total supply of LP tokens minted. Duration: 1min
9. Walkthrough: Calculate Token Amount
A simplified Solidity function to calculate token amounts - This function calculates the amount of liquidity tokens to be minted or burned, taking into account whether liquidity is being added or removed. It does not consider the fees that might occur when the pool is imbalanced. Duration: 2min

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

Tasuku Nakamura

Founder at smartcontract.engineer

Smart contract engineer and educator.

Last updated on January 12, 2026