Dapp

Languages

In Nebulas, there are two supported smart contract languages:

• JavaScript

• TypeScript

They are supported by the integration of Chrome V8, a widely used JavaScript engine developed by The Chromium Project for Google Chrome and Chromium web browsers.

Execution Model

The diagram below is the Execution Model of Smart Contract:

Smart Contract Execution Model

1. All src of Smart Contract and arguments are packaged in Transaction and deployed on Nebulas.

2. The execution of Smart Contract are divided into two phases:

   1. Preprocess: inject tracing instruction, etc.

   2. Execute: generate executable src and execute it.

Contracts

Contracts in Nebulas are similar to classes in object-oriented languages. They contain persistent data in state variables and functions that can modify these variables.