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13 min read
Time Travel Testing with LiteSVM In Solana, writing test cases that depend on the passing of time is tricky. We might want to test that something happens in our code after a day passes, but we can't...
Last updated on Oct 15, 2025Implementing Token Metadata with Metaplex We introduced the Metaplex metadata standard in the previous tutorial. In this one, we’ll create an SPL token and attach metadata to it using the Metaplex...
Last updated on Oct 14, 202513 min read
How Metaplex Metadata for Tokens Works We have deployed and interacted with SPL tokens, but none of them had a name, symbol, or any metadata attached. Instead, we identified each token by its mint...
Last updated on Oct 14, 2025Basic Bank Tutorial with SPL Tokens and Anchor In this tutorial, we’ll build a simple bank program on Solana with the basic features you'd expect from a regular bank. Users can create accounts, check...
Last updated on Feb 13, 202610 min read
Token Sale with Total Supply Tutorial A token sale program is a smart contract that sells a specific token, usually in exchange for a native token like SOL, at a fixed price. The sale runs until a...
Last updated on Oct 14, 2025Transferring SPL Tokens with Anchor and Web3.js In the previous tutorial, we learned how SPL tokens work. In this tutorial, we’ll implement a full SPL token lifecycle: create, mint, transfer, and...
Last updated on Oct 13, 202518 min read
How the SPL Token Works Solana Program Library Token (SPL Token) is Solana's standard for tokens: how to create tokens and how they should behave. It is Solana’s equivalent to Ethereum’s token...
Last updated on Oct 13, 2025Calculating the real reserves between two prices in the Uniswap V3 codebase In previous chapters, we derived formulas to calculate the real reserves of tokens X and Y between two prices in a segment....
Last updated on Oct 6, 2025The Fundamental Theorem of Finite Cyclic Groups The Fundamental Theorem of Cyclic Groups provides guarantees about the existence of cyclic subgroups within a cyclic group. In the context of the...
Last updated on Nov 1, 202510 min read
The constant product formula in Uniswap v3 Our goal is to derive the constant product formula based on real reserves for a segment, given by $$ L^2 = (x_r+\frac{L}{\sqrt{p_u}})(y_r+L\sqrt{p_l}) $$...
Last updated on Sep 15, 2025How Ethereum address are derived (EOAs, CREATE, and CREATE2) On Ethereum, smart contracts can be deployed in one of three ways: An Externally Owned Account (EOA) initiates the transaction where the...
Last updated on Aug 22, 202511 min read
Real reserves in Uniswap v3 In the last chapter, we introduced two new concepts: real reserves and virtual reserves. The real reserves of a segment are the amount of tokens contained in that segment—...
Last updated on Aug 20, 2025