Practice projects

This chapter contains three practice projects to further hone your skills. They will cover different concepts and Clarity features.

• The time-locked wallet project provides a nice introduction to how blockchains change over time. You will use the block height (the length of the chain) to create a contract that unlocks when an amount of time has passed.
• The smart-claimant is a follow-up project to illustrate how inter-contract calls work and how you can you can build on top of other smart contracts.
• Finally, the multi-signature vault project teaches you how to build a basic voting mechanism and how to iterate over sequences.