Setting up the Environment using Protostar

Installation

curl -L https://raw.githubusercontent.com/software-mansion/protostar/master/install.sh | bash

Project initialization

protostar init

Project compilation

• Specify contracts and their files in protostar.toml.

protostar build

Project Deployment

protostar declare ./build/main.json --network alpha-goerli

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Cairo programs

1. Print program
   In this program we will learn,
   

• Use of output_ptr builtins and implicit arguments

2. Variable Program
   In this program we will learn,
   

• Diff bw let , tempvar and local variables

a) const used for constants, can not be re-assigned. local used for local variables. Can not be re-assigned and requires adding alloc_locals to the function. tempvar used for temporary variables. They can be re-assigned. let used to create alias by value or by reference to other variables. Can be re-assigned.

3. constructors Program
   In this program we will learn,
   

• Using constructor and deployment by passing arguments

protostar deploy ./build/main.json --inputs 123 200 --network alpha-goerli

4. Revoked references Program
   In this program we will learn,
   

• The scope of some types of references in Cairo (e.g., return values of functions and temporary variables) is somewhat restricted.

• a call to another function may revoke those references.

to be continued....

5. Array Program
   

In this program we will learn,
alloc : alloc is function that help us allocate a block of memory to store our values.

Medium Link

To store a value you will alloc and alloc will give you a address which is free.