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Prabusah
Prabusah

Posted on • Updated on

AWS Lambda in-built UUID

Example:

const AWS = require('aws-sdk');

exports.handler = async (event) => {
   console.log(AWS.util.uuid.v4());
}
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How this works:
Below snippet from aws-sdk-js shows - it does having uuid node dependency included.

  /**
   * @api private
   */
  uuid: {
    v4: function uuidV4() {
      return require('uuid').v4();
    }
  } 
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Benefits

  • Avoiding addition of npm dependency uuid.
  • Reduced code size. Saves few milliseconds of cold start time.

Option: Node.js in-built module crypto

const {randomUUID} = require('crypto'); //Crypto is part of Node.js runtime since v14.17 
console.log(randomUUID());
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Current Node.js lambda runtime 14.x does supports above code.

Learned about this option from @galkin comments to this post. Thank you.

Image by Ian Lindsay from Pixabay

Top comments (2)

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galkin profile image
Nikita Galkin

Use const { randomUUID } = require('crypto');

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fmcdev profile image
fmcdev • Edited

This saved my day with AWS Lambda functions, to replace the AWS.util.uuid.v4() not available anymore in aws-sdk V3 without compiling and adding extra layers!!! Thanks so much!