IIT-G 23' Curiosity killed the cat.
This one is tougher than usual and needs some knowledge of the EVM but no worries, I will explain everything from the ground up. In this challenge, we need to create a contract that is smaller than 10 bytes and returns a number 42 (psst. Read this) w...
This is a relatively easy challenge, introducing the concepts of a token factory and RLP encoding. The whole idea of this challenge is that we have created a token contract using the token factory and deployed some Eth to it, the address of this new ...
You would need the knowledge from Level 6 and Level 12 to solve this challenge. This challenge teaches us about libraries. They do not have storage and cannot hold state variables or functions. Hence, they should be labeled as such to avoid misusing ...
This level introduces ERC-20 tokens, and ways to transfer them around. In the challenge, we hold all the naught coins, but the catch is that they are locked for 10 years. Our goal is to access them and transfer them to another address. NaughtCoin is...
This is similar to the previous challenge Gatekeeper One in the sense that, it also has three modifiers/gates that you need to pass. You will learn about extcodesize() and the bitwise XOR operator. This gatekeeper introduces a few new challenges. Re...
I will explain the challenge in a slightly different way this time, usually, we start with some background information, look at the code, and then write a solution. This challenge is different as there are three mini-challenges mixed in, so we will h...
This challenge is marked as a 4/5 difficulty level problem but would fail to meet your expectations. If you remember the Vault - Level 8, you pretty much understand the background required to get your hands dirty and solve the problem. Objective: Th...
This challenge teaches us about interfaces and gives us some important lessons while working on smart contracts: Prevention is better than cure and never trust external actors blindly while writing your contracts. Our objective is to make the elevat...
This challenge is a good one. We learn about the famous re-entrancy attack. This attack was responsible for the infamous 'The DAO Hack'. It is the reason why there was a hard fork on the Ethereum chain and we now have two chains, the legacy chain - E...
