The following tutorials present several Casper features in depth:



A counter on the Casper chain

Deploy a counter contract and call its entry points to increment it

ERC-20 implementation

Implement the ERC-20 standard for Casper

Key-value storage on Casper

Design a simple contract to store a value

Multi-signatures and key recovery

Learn to sign transactions with multiple keys

Smart contract upgrades

Learn how to upgrade smart contracts