Germany- The Vandals were a Germanic people who invaded Gaul, Spain, and Africa. The Vandal King Gaiseric eventually conquered the entire Roman province in Northern Africa, and even managed to sack Rome in 455 CE. The Vandals also pressured Sicily and southern Italy. The Vandals demonstrated the military prowess of …

I've produced the maps in 5 separate history volumes. That includes more than 80 professionally produced and commercially published illustrations. I think I am finally getting the hang of Adobe Illustrator.

Introduction to proofs of knowledge - journal club - part 2

A proof of knowledge is a proof in which a prover can convince a verifier that it knows a secret. Typically the goal is to do so without revealing the secret which arrives at zero knowledge being expressed by the proving …

Commit signature verification is a way of ensuring that the commits you make or receive are authentic and have not been tampered with. By signing your commits with a cryptographic key, you can prove that you are the author of the code and that no one else has modified it …

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 …

390- 461 CE - Saint Patrick was a Christian missionary who went to Ireland in the fifth century CE. Patrick was kidnaped as a child and taken to Ireland where he was compelled to work as a slave, however, he later managed to escape. After Patrick's escape he became a monk …