Use this feature to add Trustline of Diruna token on Stellar wallets. Click the 'Browse ...' button and select the directory where the .txt file will contain the list of Secret Key wallets. Then click the 'Import' button to copy it automatically into the available fields. Use the 'Reset' button to clear the Secret Key data from the column. Then click the 'Add Trustline' button to start the Add Trust Diruna process. Do not close this browser page before the Add trust process is complete. To avoid failure it is recommended that each executed .txt Secret Key file be no more than 500 Secret Key.