CTF Playground
Learn to adopt the offensive mindset to master security in smart contracts.
Challenges
Extra Bank
Something have left behind, that could turn the bank into a TORNADO of chaos!
Lock Pool
Could you retrieve all of the locked tokens from the lock pool?
NFT Whitelist
A new NFT Market has been opened!, who is in the whitelists can claim the NFT without spending any ETH.
Poor Boy
A young guy has got very little money, can't use any services, but there's still a tiny bit of hope.
The Collector
The Collector NFT Market has been opened!. The more you own, the cheaper you can buy.
The Bullied Boy
The bullied boy want to ensure that nobody else could taste victory, not even the class teacher!
The Secret Source
Whoever guesses correctly the secret source will win the 1 million tokens reward.
Trick or Thieve
The new marketplace has been launched for just a minute, Could you retrieve the token by purchase nothing?
Lotto888
Welcome to the wild world of gambling, where luck can be as tricky as a cat playing hide-and-seek.
Alice in The Dark
Alice dislikes dark colors and enjoys wearing bright ones, such as a pink dress, and the challenge is to playfully suggest a black dress to tease her.
Freeze The Flow
The challenge entails deactivating the deposit function in the VaultHelper contract, which serves as the interface for users to interact with an ether vault where they can deposit and withdraw funds.