Structure of a Contract

Contracts in Viper are contained within files, with each file being one smart-contract. Files in Viper are similar to classes in object-oriented languages. Each file can contain declarations of State Variables, Functions, and structure-structs-types.

State Variables

State variables are values which are permanently stored in contract storage.

storedData: num

See the Types section for valid state variable types and visibility-and-getters for possible choices for visibility.


Functions are the executable units of code within a contract.

function bid(): // Function
  // ...

function-calls can happen internally or externally and have different levels of visibility (visibility-and-getters) towards other contracts.