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Generating UUID (Universally Unique Identifier) in JavaScript

javascript
#UUID generation #generateUUID function #random number generation 
function generateUUID() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        const r = Math.random() * 16 | 0;
        const v = c === 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}
const uuid = generateUUID();
console.log('Generated UUID:', uuid);

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Understanding `crypto.randomBytes` and `ethers.randomBytes`: A Comparison

Both crypto.randomBytes and ethers.randomBytes generate cryptographically secure random bytes, meaning the bytes are suitable for use in cryptographic applications such as key generation, encryption, and other security-sensitive operations.

  • Use crypto.randomBytes when:
  • You are building Node.js applications without blockchain-specific functionality.
  • You want to avoid adding external dependencies.
  • Use ethers.randomBytes when:
  • You are developing Ethereum-related applications and already have ethers.js in your project.
  • You want the flexibility of generating random bytes with minimal configuration, defaulting to 32 bytes for Ethereum addresses or private keys.

Oct 24, 2024
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