Function decryptMessage

decryptMessage(ciphertext, nonce, sender_public_key, recipient_private_key): null | string
Decrypt a message using sender's public key and recipients's private key.
Parameters
- ciphertext: string
  
  The encrypted ciphertext.
- nonce: string
  
  The nonce used for encryption.
- sender_public_key: string
  
  The sender's public key.
- recipient_private_key: string
  
  The recipient's private key.
Returns null | string
string | null - The decrypted message or null if decryption fails.
- Defined in src/lib/util.ts:412