Grep-Fu

Custom errors are a feature of Solidity that allow you to display error messages to the user in a convenient and gas-efficient way. They are declared in the head of the contract and called after a revert statement.

error Unauthorized();
if (msg.sender != owner()) {
  revert Unauthorized();
}

However, a challenge …

Dynamic Address Set

This is a complete step by step walkthrough implementation of a dynamic address set in Solidity for Ethereum blockchain.

Includes:

• foundry
• modifier
• event
• dynamic data structures

• unit testing

• Full project on GitHub

• Full tutorial on YouTube:

Immediately get started developing smart contracts using the Collective.

Full tutorial on YouTube:

Here is a trivial example that finds an event from a Transaction Receipt in ethers js.

Although there are examples of getting events from a particular transaction using ethers js. I found it fairly difficult to find an example that searches for events from a particular block or transaction. Here is a code to do just that:

The Internet is guilty of having a supreme lack of trivial functional examples. In the past trivial examples frequently functioned as the documentation for various libraries and utilities. While that was probably what we refert to now as the 'bad old days.' The modern focus on documentation and literate code …