Counter

This example demonstrates a counter application.

Prerequisites

This example requires an installation of:

• Install the IC SDK.
• Download the following project files from GitHub: git clone https://github.com/dfinity/examples/

Begin by opening a terminal window.

Step 1: Setup the project environment

Navigate into the folder containing the project's files and start a local instance of the Internet Computer with the commands:

cd examples/rust/counter
dfx start --background

Step 2: Test the canister

cargo test

Step 3: Deploy the canister

dfx deploy

Step 4: Set the value of the counter

dfx canister call counter set '(7)'

Step 5: Increment the value of the counter

dfx canister call counter inc

Step 6: Get the value of the counter

dfx canister call counter get

The following output should be returned:

(8 : nat)

Security considerations and best practices

If you base your application on this example, we recommend you familiarize yourself with and adhere to the security best practices for developing on the Internet Computer. This example may not implement all the best practices.