Creating "mappings" and "nested mapping" in Solana !"Mappings" and "Nested Mappings" in Solana In the previous tutorials, the parameter was always empty. If we put data into it, it behaves like a key...

Modifying accounts using different signers !Hero image showing Anchor Signer: Modifying accounts with different signers In our Solana tutorials thus far, we've only had one account initialize and...

The Solana clock and other "block" variables !solana clock Today we will cover the analogs of all the block variables from Solidity. Not all of them have 1-1 analogs. In Solidity, we have the...

Function modifiers (view, pure, payable) and fallback functions in Solana: why they don't exist !Hero image showing view, pure, payable, fallback, and receive in Solona Solana does not have fallback...

Try Catch and all the ways Solidity can revert This article describes all the kinds of errors that can happen when a smart contract is called, and how the Solidity Try / Catch block responds (or...

Storage Slots in Solidity: Storage Allocation and Low-level assembly storage operations This article examines the storage architecture of the Ethereum Smart Contracts. It explains how variables are...

Over 150 interview questions for Ethereum Developers All of these questions can be answered in three sentences or less. Easy What is the difference between private, internal, public, and external...

ERC-7201 Storage Namespaces Explained ERC-7201 (formerly EIP-7201) is a standard for grouping storage variables together by a common identifier called a namespace, and also to document the group of...

Fixed Point Arithmetic in Solidity (Using Solady, Solmate, and ABDK as Examples) A fixed-point number is an integer that stores only the numerator of a fraction — while the denominator is implied....

Understanding ABI encoding for function calls ABI encoding is the data format used for making function calls to smart contracts. It is also how smart contracts encode data when making calls to other...