post https://api.testnet.octet.im/2.0/secret-key/wallets//child-addresses/
You can apply to retrieve the private key of a child address. Upon successful application, a UUID for the request will be returned. To use this service, you must first register your RSA public key for receiving data through the customer support center.The retrieved key will be encrypted using the registered RSA public key and stored securely. The encrypted key can be accessed through the Key Retrieval Request Information API. The child address mnemonic is managed by Octet. If you need the mnemonic, please contact us at [email protected].