Examples with FileContentsQuery com.hedera.hashgraph.sdk.FileContentsQuery used on opensource projects

Example 11 with FileContentsQuery

use of com.hedera.hashgraph.sdk.FileContentsQuery in project hedera-sdk-java by hashgraph.

the class GetAddressBookExample method main.

public static void main(String[] args) throws PrecheckStatusException, IOException, TimeoutException {
    Client client = Client.forName(HEDERA_NETWORK);
    // Defaults the operator account ID and key such that all generated transactions will be paid for
    // by this account and be signed by this key
    client.setOperator(OPERATOR_ID, OPERATOR_KEY);
    FileContentsQuery fileQuery = new FileContentsQuery().setFileId(FileId.ADDRESS_BOOK);
    Hbar cost = fileQuery.getCost(client);
    System.out.println("file contents cost: " + cost);
    fileQuery.setMaxQueryPayment(new Hbar(1));
    ByteString contents = fileQuery.execute(client);
    Files.deleteIfExists(FileSystems.getDefault().getPath("address-book.proto.bin"));
    Files.copy(new ByteArrayInputStream(contents.toByteArray()), FileSystems.getDefault().getPath("address-book.proto.bin"));
    // NEW (Feb 25 2022): you can now fetch the address book for free from a mirror node with AddressBookQuery
    NodeAddressBook addressBook = new AddressBookQuery().setFileId(FileId.ADDRESS_BOOK).execute(client);
    System.out.println(addressBook);
}

Example 12 with FileContentsQuery

use of com.hedera.hashgraph.sdk.FileContentsQuery in project hedera-sdk-java by hashgraph.

the class GetFileContentsExample method main.

public static void main(String[] args) throws ReceiptStatusException, TimeoutException, PrecheckStatusException {
    Client client = Client.forName(HEDERA_NETWORK);
    // Defaults the operator account ID and key such that all generated transactions will be paid for
    // by this account and be signed by this key
    client.setOperator(OPERATOR_ID, OPERATOR_KEY);
    // Content to be stored in the file
    byte[] fileContents = "Hedera is great!".getBytes(StandardCharsets.UTF_8);
    // Create the new file and set its properties
    TransactionResponse newFileTransactionResponse = new FileCreateTransaction().setKeys(// The public key of the owner of the file
    OPERATOR_KEY).setContents(// Contents of the file
    fileContents).setMaxTransactionFee(new Hbar(2)).execute(client);
    FileId newFileId = Objects.requireNonNull(newFileTransactionResponse.getReceipt(client).fileId);
    // Print the file ID to console
    System.out.println("The new file ID is " + newFileId.toString());
    // Get file contents
    ByteString contents = new FileContentsQuery().setFileId(newFileId).execute(client);
    // Prints query results to console
    System.out.println("File content query results: " + contents.toStringUtf8());
}