[WalletRPC] Implement encrypt & decrypt methods

[Chralu]

Following WalletRPC methods are missing in wallet client.

encrypt_payloads

Encrypt many payloads with account public key.

Request

{
  "serviceName": String,              // Service name to use to encrypt the payload
  "pathSuffix": String,               // Additional information to add to a service derivation path (optional)
  "payloads": [
    {
      "payload": String,              // Payload to encrypt
      "isHexa": boolean               // Precise if the payload if in hexadecimal format
    }
  ]
}

Success Response

{
  "encryptedPayloads": [
    {
      "encryptedPayload": String,        // Encrypted payload
    }
  ]
}

decrypt_payloads

Decrypt many payloads with account private key.

Request

{
  "serviceName": String,              // Service name to use to decrypt the payload
  "pathSuffix": String,               // Additional information to add to a service derivation path (optional)
    "description": String {             // Readable description to explain the purpose of decrypting payloads (locale + description)
    "en": "Readable description in English",
    "fr": "Description lisible en français",
  },
  "payloads": [
    {
      "payload": String,              // Payload to decrypt
      "isHexa": boolean               // Precise if the payload if in hexadecimal format
    }
  ]
}

Success Response

{
  "decryptedPayloads": [
    {
      "decryptedPayload": String,        // Decrypted payload
    }
  ]
}

Additional context

No response

Epic

No response