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WASM Ballot Contract

Introduction

In this chapter, we will teach you how to use ink! to write more complex contracts.
We will build a "Ballot" contract which will allow users to add proposals to a ballot and vote on them. The users will be able to register themselves as a voter with a function call and there will be a chair person (owner) of the contract that will oversee the process.
Over the course of this chapter you will learn:
  • To build custom structs
  • To store custom structs in vectors and hash maps
  • To safely get and update the structs in these collections
  • To use ink_prelude crate
  • To use traits like Clone, Debug, PackedLayout and SpreadLayout
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