usegetsharedsecret.md

description
Generate a shared secret using Elliptic Curve Diffie-Hellman key exchange with your customers' Comet wallet.

useGetSharedSecret

{% hint style="info" %} useGetSharedSecret is an advanced feature of Comet's React SDK. Except for situations which require secure symmetric encryption, you will probably not need this React hook. {% endhint %}

Using Comet's built in cloud wallets, users can perform Diffie-Hellman key exchange to generate a shared secret with another party's Solana public key. This shared secret can be used for secure communication between two Solana addresses.

API

const { getSharedSecret } = useGetSharedSecret({ publicKey: '<SOLANA ADDRESS>' });

In the example above, the publicKey can be a string, Buffer, or Uint8Array.

getSharedSecret is a function that can be called later on, which will bring up the confirmation dialog. Users will be prompted to log in to Comet if needed. When the user clicks "Confirm", a shared secret will be calculated between the user's private key and the supplied public key.

getSharedSecret returns a successful Promise containing the shared secret in Uint8Array format if the user clicks "Confirm"; otherwise it will return a failed Promise if the user clicks "Cancel".

Example

import { useGetSharedSecret } from '@comet-labs/react';

function App() {
  const { getSharedSecret } = useGetSharedSecret({ publicKey: 'Dgq5B8i5NJJfPoUgpkFZDzRr84zd1BJrUBntJt1EBvgd' });

  return (
    <div className="App">
      <button onClick={getSharedSecret}>
        click for diffie hellman
      </button>
    </div>
  );
}