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

Example 1 with ScheduleInfo

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

the class ScheduleMultiSigTransactionExample method main.

public static void main(String[] args) throws Exception {
    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);
    AccountId operatorId = Objects.requireNonNull(client.getOperatorAccountId());
    // Generate 3 random keys
    PrivateKey key1 = PrivateKey.generateED25519();
    PrivateKey key2 = PrivateKey.generateED25519();
    PrivateKey key3 = PrivateKey.generateED25519();
    // Create a keylist from those keys. This key will be used as the new account's key
    // The reason we want to use a `KeyList` is to simulate a multi-party system where
    // multiple keys are required to sign.
    KeyList keyList = new KeyList();
    keyList.add(key1.getPublicKey());
    keyList.add(key2.getPublicKey());
    keyList.add(key3.getPublicKey());
    System.out.println("key1 private = " + key1);
    System.out.println("key1 public = " + key1.getPublicKey());
    System.out.println("key1 private = " + key2);
    System.out.println("key2 public = " + key2.getPublicKey());
    System.out.println("key1 private = " + key3);
    System.out.println("key3 public = " + key3.getPublicKey());
    System.out.println("keyList = " + keyList);
    // Creat the account with the `KeyList`
    TransactionResponse response = new AccountCreateTransaction().setNodeAccountIds(Collections.singletonList(new AccountId(3))).setKey(keyList).setInitialBalance(new Hbar(10)).execute(client);
    // This will wait for the receipt to become available
    @Var TransactionReceipt receipt = response.getReceipt(client);
    AccountId accountId = Objects.requireNonNull(receipt.accountId);
    System.out.println("accountId = " + accountId);
    // Generate a `TransactionId`. This id is used to query the inner scheduled transaction
    // after we expect it to have been executed
    TransactionId transactionId = TransactionId.generate(operatorId);
    System.out.println("transactionId for scheduled transaction = " + transactionId);
    // Create a transfer transaction with 2/3 signatures.
    @Var TransferTransaction transfer = new TransferTransaction().addHbarTransfer(accountId, new Hbar(1).negated()).addHbarTransfer(operatorId, new Hbar(1));
    // Schedule the transactoin
    ScheduleCreateTransaction scheduled = transfer.schedule().setPayerAccountId(client.getOperatorAccountId()).setAdminKey(client.getOperatorPublicKey()).freezeWith(client).sign(key2);
    receipt = scheduled.execute(client).getReceipt(client);
    // Get the schedule ID from the receipt
    ScheduleId scheduleId = Objects.requireNonNull(receipt.scheduleId);
    System.out.println("scheduleId = " + scheduleId);
    // Get the schedule info to see if `signatories` is populated with 2/3 signatures
    ScheduleInfo info = new ScheduleInfoQuery().setNodeAccountIds(Collections.singletonList(response.nodeId)).setScheduleId(scheduleId).execute(client);
    System.out.println("Schedule Info = " + info);
    transfer = (TransferTransaction) info.getScheduledTransaction();
    Map<AccountId, Hbar> transfers = transfer.getHbarTransfers();
    // Make sure the transfer transaction is what we expect
    if (transfers.size() != 2) {
        throw new Exception("more transfers than expected");
    }
    if (!transfers.get(accountId).equals(new Hbar(1).negated())) {
        throw new Exception("transfer for " + accountId + " is not what is expected " + transfers.get(accountId));
    }
    if (!transfers.get(operatorId).equals(new Hbar(1))) {
        throw new Exception("transfer for " + operatorId + " is not what is expected " + transfers.get(operatorId));
    }
    System.out.println("sending schedule sign transaction");
    // Finally send this last signature to Hedera. This last signature _should_ mean the transaction executes
    // since all 3 signatures have been provided.
    new ScheduleSignTransaction().setNodeAccountIds(Collections.singletonList(response.nodeId)).setScheduleId(scheduleId).freezeWith(client).sign(key3).execute(client).getReceipt(client);
    // Query the schedule info again
    new ScheduleInfoQuery().setNodeAccountIds(Collections.singletonList(response.nodeId)).setScheduleId(scheduleId).execute(client);
}

Example 2 with ScheduleInfo

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

the class ScheduleCreateIntegrationTest method canSignSchedule2.

@Test
@DisplayName("Can sign schedule")
void canSignSchedule2() throws Exception {
    var testEnv = new IntegrationTestEnv(1);
    PrivateKey key1 = PrivateKey.generateED25519();
    PrivateKey key2 = PrivateKey.generateED25519();
    PrivateKey key3 = PrivateKey.generateED25519();
    KeyList keyList = new KeyList();
    keyList.add(key1.getPublicKey());
    keyList.add(key2.getPublicKey());
    keyList.add(key3.getPublicKey());
    // Creat the account with the `KeyList`
    TransactionResponse response = new AccountCreateTransaction().setKey(keyList).setInitialBalance(new Hbar(10)).execute(testEnv.client);
    // This will wait for the receipt to become available
    @Var TransactionReceipt receipt = response.getReceipt(testEnv.client);
    AccountId accountId = Objects.requireNonNull(receipt.accountId);
    // Generate a `TransactionId`. This id is used to query the inner scheduled transaction
    // after we expect it to have been executed
    TransactionId transactionId = TransactionId.generate(testEnv.operatorId);
    // Create a transfer transaction with 2/3 signatures.
    TransferTransaction transfer = new TransferTransaction().setTransactionId(transactionId).addHbarTransfer(accountId, new Hbar(1).negated()).addHbarTransfer(testEnv.operatorId, new Hbar(1));
    // Schedule the transactoin
    ScheduleCreateTransaction scheduled = transfer.schedule();
    receipt = scheduled.execute(testEnv.client).getReceipt(testEnv.client);
    // Get the schedule ID from the receipt
    ScheduleId scheduleId = Objects.requireNonNull(receipt.scheduleId);
    // Get the schedule info to see if `signatories` is populated with 2/3 signatures
    @Var ScheduleInfo info = new ScheduleInfoQuery().setScheduleId(scheduleId).execute(testEnv.client);
    assertThat(info.executedAt).isNull();
    // Finally send this last signature to Hedera. This last signature _should_ mean the transaction executes
    // since all 3 signatures have been provided.
    ScheduleSignTransaction signTransaction = new ScheduleSignTransaction().setScheduleId(scheduleId).freezeWith(testEnv.client);
    signTransaction.sign(key1).sign(key2).sign(key3).execute(testEnv.client).getReceipt(testEnv.client);
    info = new ScheduleInfoQuery().setScheduleId(scheduleId).execute(testEnv.client);
    assertThat(info.executedAt).isNotNull();
    new AccountDeleteTransaction().setAccountId(accountId).setTransferAccountId(testEnv.operatorId).freezeWith(testEnv.client).sign(key1).sign(key2).sign(key3).execute(testEnv.client).getReceipt(testEnv.client);
    testEnv.close();
}

Example 3 with ScheduleInfo

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

the class ScheduledTransactionMultiSigThresholdExample method main.

// public static void main(String[] args) throws PrecheckStatusException, IOException, TimeoutException, ReceiptStatusException {
public static void main(String[] args) throws PrecheckStatusException, TimeoutException, ReceiptStatusException {
    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);
    // Generate four new Ed25519 private, public key pairs.
    PrivateKey[] privateKeys = new PrivateKey[4];
    PublicKey[] publicKeys = new PublicKey[4];
    for (int i = 0; i < 4; i++) {
        PrivateKey key = PrivateKey.generateED25519();
        privateKeys[i] = key;
        publicKeys[i] = key.getPublicKey();
        System.out.println("public key " + (i + 1) + ": " + publicKeys[i]);
        System.out.println("private key " + (i + 1) + ": " + privateKeys[i]);
    }
    // require 3 of the 4 keys we generated to sign on anything modifying this account
    KeyList transactionKey = KeyList.withThreshold(3);
    Collections.addAll(transactionKey, publicKeys);
    TransactionResponse transactionResponse = new AccountCreateTransaction().setKey(transactionKey).setInitialBalance(Hbar.fromTinybars(1)).setAccountMemo("3-of-4 multi-sig account").execute(client);
    // This will wait for the receipt to become available
    TransactionReceipt txAccountCreateReceipt = transactionResponse.getReceipt(client);
    AccountId multiSigAccountId = Objects.requireNonNull(txAccountCreateReceipt.accountId);
    System.out.println("3-of-4 multi-sig account ID: " + multiSigAccountId);
    AccountBalance balance = new AccountBalanceQuery().setAccountId(multiSigAccountId).execute(client);
    System.out.println("Balance of account " + multiSigAccountId + ": " + balance.hbars.toTinybars() + " tinybar.");
    // schedule crypto transfer from multi-sig account to operator account
    TransactionResponse transferToSchedule = new TransferTransaction().addHbarTransfer(multiSigAccountId, Hbar.fromTinybars(-1)).addHbarTransfer(Objects.requireNonNull(client.getOperatorAccountId()), Hbar.fromTinybars(1)).schedule().freezeWith(client).sign(// add 1 signature`
    privateKeys[0]).execute(client);
    TransactionReceipt txScheduleReceipt = transferToSchedule.getReceipt(client);
    System.out.println("Schedule status: " + txScheduleReceipt.status);
    ScheduleId scheduleId = Objects.requireNonNull(txScheduleReceipt.scheduleId);
    System.out.println("Schedule ID: " + scheduleId);
    TransactionId scheduledTxId = Objects.requireNonNull(txScheduleReceipt.scheduledTransactionId);
    System.out.println("Scheduled tx ID: " + scheduledTxId);
    // add 2 signature
    TransactionResponse txScheduleSign1 = new ScheduleSignTransaction().setScheduleId(scheduleId).freezeWith(client).sign(privateKeys[1]).execute(client);
    TransactionReceipt txScheduleSign1Receipt = txScheduleSign1.getReceipt(client);
    System.out.println("1. ScheduleSignTransaction status: " + txScheduleSign1Receipt.status);
    // add 3 signature
    TransactionResponse txScheduleSign2 = new ScheduleSignTransaction().setScheduleId(scheduleId).freezeWith(client).sign(privateKeys[2]).execute(client);
    TransactionReceipt txScheduleSign2Receipt = txScheduleSign2.getReceipt(client);
    System.out.println("2. ScheduleSignTransaction status: " + txScheduleSign2Receipt.status);
    // query schedule
    ScheduleInfo scheduleInfo = new ScheduleInfoQuery().setScheduleId(scheduleId).execute(client);
    System.out.println(scheduleInfo);
    // query triggered scheduled tx
    TransactionRecord recordScheduledTx = new TransactionRecordQuery().setTransactionId(scheduledTxId).execute(client);
    System.out.println(recordScheduledTx);
}

Example 4 with ScheduleInfo

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

the class ScheduledTransferExample method main.

public static void main(String[] args) throws TimeoutException, PrecheckStatusException, ReceiptStatusException {
    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);
    Objects.requireNonNull(client.getOperatorAccountId());
    /*
         * A scheduled transaction is a transaction that has been proposed by an account,
         * but which requires more signatures before it will actually execute on the Hedera network.
         *
         * For example, if Alice wants to transfer an amount of Hbar to Bob, and Bob has
         * receiverSignatureRequired set to true, then that transaction must be signed by
         * both Alice and Bob before the transaction will be executed.
         *
         * To solve this problem, Alice can propose the transaction by creating a scheduled
         * transaction on the Hedera network which, if executed, would transfer Hbar from
         * Alice to Bob.  That scheduled transaction will have a ScheduleId by which we can
         * refer to that scheduled transaction.  Alice can communicate the ScheduleId to Bob, and
         * then Bob can use a ScheduleSignTransaction to sign that scheduled transaction.
         *
         * Bob has a 30 minute window in which to sign the scheduled transaction, starting at the
         * moment that Alice creates the scheduled transaction.  If a scheduled transaction
         * is not signed by all of the necessary signatories within the 30 minute window,
         * that scheduled transaction will expire, and will not be executed.
         *
         * Once a scheduled transaction has all of the signatures necessary to execute, it will
         * be executed on the Hedera network automatically.  If you create a scheduled transaction
         * on the Hedera network, but that transaction only requires your signature in order to
         * execute and no one else's, that scheduled transaction will be automatically
         * executed immediately.
         */
    PrivateKey bobsKey = PrivateKey.generateED25519();
    AccountId bobsId = new AccountCreateTransaction().setReceiverSignatureRequired(true).setKey(bobsKey).setInitialBalance(new Hbar(10)).freezeWith(client).sign(bobsKey).execute(client).getReceipt(client).accountId;
    Objects.requireNonNull(bobsId);
    System.out.println("Alice's ID: " + client.getOperatorAccountId().toStringWithChecksum(client));
    System.out.println("Bob's ID: " + bobsId.toStringWithChecksum(client));
    AccountBalance bobsInitialBalance = new AccountBalanceQuery().setAccountId(bobsId).execute(client);
    System.out.println("Bob's initial balance:");
    System.out.println(bobsInitialBalance);
    TransferTransaction transferToSchedule = new TransferTransaction().addHbarTransfer(client.getOperatorAccountId(), new Hbar(-10)).addHbarTransfer(bobsId, new Hbar(10));
    System.out.println("Transfer to be scheduled:");
    System.out.println(transferToSchedule);
    /*
         * The payerAccountId is the account that will be charged the fee
         * for executing the scheduled transaction if/when it is executed.
         * That fee is separate from the fee that we will pay to execute the
         * ScheduleCreateTransaction itself.
         *
         * To clarify: Alice pays a fee to execute the ScheduleCreateTransaction,
         * which creates the scheduled transaction on the Hedera network.
         * She specifies when creating the scheduled transaction that Bob will pay
         * the fee for the scheduled transaction when it is executed.
         *
         * If payerAccountId is not specified, the account who creates the scheduled transaction
         * will be charged for executing the scheduled transaction.
         */
    ScheduleId scheduleId = new ScheduleCreateTransaction().setScheduledTransaction(transferToSchedule).setPayerAccountId(bobsId).execute(client).getReceipt(client).scheduleId;
    Objects.requireNonNull(scheduleId);
    System.out.println("The scheduleId is: " + scheduleId.toStringWithChecksum(client));
    /*
         * Bob's balance should be unchanged.  The transfer has been scheduled, but it hasn't been executed yet
         * because it requires Bob's signature.
         */
    AccountBalance bobsBalanceAfterSchedule = new AccountBalanceQuery().setAccountId(bobsId).execute(client);
    System.out.println("Bob's balance after scheduling the transfer (should be unchanged):");
    System.out.println(bobsBalanceAfterSchedule);
    /*
         * Once Alice has communicated the scheduleId to Bob, Bob can query for information about the
         * scheduled transaction.
         */
    ScheduleInfo scheduledTransactionInfo = new ScheduleInfoQuery().setScheduleId(scheduleId).execute(client);
    System.out.println("Info about scheduled transaction:");
    System.out.println(scheduledTransactionInfo);
    /*
         * getScheduledTransaction() will return an SDK Transaction object identical to the transaction
         * that was scheduled, which Bob can then inspect like a normal transaction.
         */
    Transaction<?> scheduledTransaction = scheduledTransactionInfo.getScheduledTransaction();
    // We happen to know that this transaction is (or certainly ought to be) a TransferTransaction
    if (scheduledTransaction instanceof TransferTransaction) {
        TransferTransaction scheduledTransfer = (TransferTransaction) scheduledTransaction;
        System.out.println("The scheduled transfer transaction from Bob's POV:");
        System.out.println(scheduledTransfer);
    } else {
        System.out.println("The scheduled transaction was not a transfer transaction.");
        System.out.println("Something has gone horribly wrong.  Crashing...");
        System.exit(-1);
    }
    new ScheduleSignTransaction().setScheduleId(scheduleId).freezeWith(client).sign(bobsKey).execute(client).getReceipt(client);
    AccountBalance balanceAfterSigning = new AccountBalanceQuery().setAccountId(bobsId).execute(client);
    System.out.println("Bob's balance after signing the scheduled transaction:");
    System.out.println(balanceAfterSigning);
    ScheduleInfo postTransactionInfo = new ScheduleInfoQuery().setScheduleId(scheduleId).execute(client);
    System.out.println("Info on the scheduled transaction, executedAt should no longer be null:");
    System.out.println(postTransactionInfo);
    // Clean up
    new AccountDeleteTransaction().setTransferAccountId(client.getOperatorAccountId()).setAccountId(bobsId).freezeWith(client).sign(bobsKey).execute(client).getReceipt(client);
    client.close();
}