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Counter

View this sample's code on GitHub

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: Navigate into the folder containing the project's files and start a local instance of the replica with the command:​

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.