JS Task API Examples: using app-key

Yagna service is installed and running with the try_golem app-key configured.

Create a project folder, initialize a Node.js project, and install the @golem-sdk/golem-js library.

mkdir golem-example
cd golem-example
npm init
npm i @golem-sdk/golem-js

Copy the code into the index.mjs file in the project folder and run:

node index.mjs

To use the Yagna REST API, your application must identify itself by an api-key. In our examples, we utilize the try_golem key. We assign this value to the YAGNA_AUTOCONF_APPKEY variable in the terminal before we start the Yagna service. Because of that, a key is automatically created and available for our exercises.

Such an api-key is easy to read and remember, and useful for quickstarts and testing examples. However, normally you should rather use unique 32-char api-keys to better protect access to your requestor and its wallet.

You can generate a unique api-key with the yagna command:

yagna app-key create requestor

In the command above requestor is the name of the key. The output is the 32-char app-key.

You can list available app-keys in your yagna instance with:

yagna app-key list

You can identify your key by name and copy the value from the key column.

Once you have created an app-key you can use it in your requestor script replacing insert-your-32-char-app-key-here with the actual key.

(async () => {
  const executor = await TaskExecutor.create({
    package: "529f7fdaf1cf46ce3126eb6bbcd3b213c314fe8fe884914f5d1106d4",    
    yagnaOptions: { apiKey: 'insert-your-32-char-app-key-here' }
    });

const result = await executor.run(
    async (ctx) => (await ctx.run("node -v")).stdout);
 await executor.end();

 console.log("Task result:", result);
})();

There is yet another option to set the apiKey. By default, the JS SDK will try to read the value from the YAGNA_APPKEY environment variable and set it as the apiKey.

To assign an app-key value to the YAGNA_APPKEY environment variable use this command:

export YAGNA_APPKEY=insert-your-32-char-app-key-here

and then remove the following line from the example script:

yagnaOptions: { apiKey: 'insert-your-32-char-app-key-here' }

When the Yagna service starts, if the environment variable YAGNA_AUTO_CONF has been set, its value will be used to create an autoconfigured app-key. However, this app-key isn't permanent; it will vanish upon restarting the service unless the YAGNA_AUTO_CONF variable is set again. While this approach is handy for tutorials and demonstrations, for regular use it's recommended to have a distinct app-key. This provides better management over access to your Yagna REST API.

export YAGNA_AUTO_CONF=insert-your-desired-app-key-here