com.icodici.universa.contract.Contract java code examples

Common ways to obtain Contract

private void myMethod () {
 Contract c =new Contract()
String fileName;Contract.fromDslFile(fileName)
Parcel parcel;parcel.getPaymentContract()
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}

@Test
public void defaultParameters() throws Exception {
  Contract contract = new Contract(TestKeys.privateKey(0));
  contract.getStateData().put("field1", "33.000000000000000001");
  ChangeNumberPermission changeNumberPermission = new ChangeNumberPermission(contract.getRole("owner"), Binder.of("field_name", "field1"));
  contract.addPermission(changeNumberPermission);
  contract.seal();
  Contract changed = contract.createRevision();
  changed.addSignerKey(TestKeys.privateKey(0));
  changed.getStateData().set("field1", "33.000000000000000002");
  changed.seal();
  changed.check();
  assertTrue(changed.isOk());
}

/**
 * Create a batch contract, which registers all the included contracts, possibily referencing each other,
 * in the single transaction, saving time and reducing U cost. Note that if any of the batched contracts
 * fails, the whole batch is rejected.
 *
 * @param contracts to register all in one batch. Shuld be prepared and sealed.
 * @param keys to sign batch with.
 * @return batch contract that includes all contracts as new items.
 */
public static Contract createBatch(Collection<PrivateKey> keys, Contract... contracts) {
  Contract batch = new Contract();
  batch.setIssuerKeys(keys);
  batch.registerRole(new RoleLink("creator","issuer"));
  batch.registerRole(new RoleLink("owner","issuer"));
  batch.setExpiresAt(ZonedDateTime.now().plusDays(3));
  for(Contract c : contracts) {
    batch.addNewItems(c);
  }
  batch.addSignerKeys(keys);
  batch.seal();
  return batch;
}

static Contract createComplexConctract(PrivateKey key, int subcontracts, int n) {
  Contract root = createSimpleContract(key);
  for(int i = 0; i < subcontracts; i++) {
    Contract c = createSimpleContract(key);
    c.setExpiresAt(c.getExpiresAt().plusSeconds(i+1+(subcontracts+1)*n));
    c.seal();
    root.addNewItems(c);
  }
  root.setExpiresAt(root.getExpiresAt().plusSeconds((subcontracts+1)*n));
  root.addSignerKey(key);
  root.seal();
  return root;
}

public synchronized static Contract finishSwap(Contract swapContract, Set<PrivateKey> keys) {
  List<Contract> swappingContracts = (List<Contract>) swapContract.getNew();
    boolean willBeMine = c.getOwner().isAllowedForKeys(keys);
      c.addSignatureToSeal(keys);
  swapContract.seal();
  swapContract.addSignatureToSeal(keys);

@Test
public void checkContractCreatedAtFutureTime() throws Exception{
  Contract futureContract = Contract.fromDslFile(rootPath + "simple_root_contract_future.yml");
  futureContract.addSignerKeyFromFile(rootPath+"_xer0yfe2nn1xthc.private.unikey");
  futureContract.seal();
  futureContract.check();
  futureContract.traceErrors();
  System.out.println("Contract is valid: " + futureContract.isOk());
  assertFalse(futureContract.isOk());
}

@Test
public void refMissingField() throws Exception {
  Contract contractA = new Contract(new PrivateKey(2048));
  contractA.getStateData().put("another_val", 100);
  Contract contractB = new Contract(new PrivateKey(2048));
  Reference ref = new Reference();
  ref.type = Reference.TYPE_EXISTING_STATE;
  ref.setConditions(Binder.of(
      Reference.conditionsModeType.all_of.name(),
      asList("ref.state.data.val>-100")
  ));
  contractB.addReference(ref);
  Contract batch = new Contract(new PrivateKey(2048));
  batch.addNewItems(contractA);
  batch.addNewItems(contractB);
  batch.seal();
  Boolean res = batch.check();
  batch.traceErrors();
  assertEquals(false, res);
}

@Test
public void checkFitTestnetCriteria() throws Exception {
  PrivateKey key = new PrivateKey(Do.read(rootPath + "keys/stepan_mamontov.private.unikey"));
  Contract contract = Contract.fromDslFile(rootPath + "LamborghiniTestDrive.yml");
  contract.setExpiresAt(ZonedDateTime.now().plusMonths(1));
  contract.addSignerKey(key);
  sealCheckTrace(contract, true);
  System.out.println("Processing cost is " + contract.getProcessedCostU());
  assertTrue(contract.isSuitableForTestnet());
  // now set contract limited for testnet
  contract.setLimitedForTestnet(true);
  sealCheckTrace(contract, true);
  assertTrue(contract.isSuitableForTestnet());
}

@Test
public void goodNotary() throws Exception {
  Set<PrivateKey> martyPrivateKeys = new HashSet<>();
  Set<PrivateKey> stepaPrivateKeys = new HashSet<>();
  Set<PublicKey> martyPublicKeys = new HashSet<>();
  Set<PublicKey> stepaPublicKeys = new HashSet<>();
  martyPrivateKeys.add(new PrivateKey(Do.read(rootPath + "keys/marty_mcfly.private.unikey")));
  stepaPrivateKeys.add(new PrivateKey(Do.read(rootPath + "keys/stepan_mamontov.private.unikey")));
  for (PrivateKey pk : stepaPrivateKeys)
    stepaPublicKeys.add(pk.getPublicKey());
  for (PrivateKey pk : martyPrivateKeys)
    martyPublicKeys.add(pk.getPublicKey());
  Contract notaryContract = ContractsService.createNotaryContract(martyPrivateKeys, stepaPublicKeys);
  notaryContract.check();
  notaryContract.traceErrors();
  assertTrue(notaryContract.isOk());
  assertTrue(notaryContract.getOwner().isAllowedForKeys(stepaPublicKeys));
  assertTrue(notaryContract.getIssuer().isAllowedForKeys(martyPrivateKeys));
  assertTrue(notaryContract.getCreator().isAllowedForKeys(martyPrivateKeys));
  assertFalse(notaryContract.getOwner().isAllowedForKeys(martyPrivateKeys));
  assertFalse(notaryContract.getIssuer().isAllowedForKeys(stepaPublicKeys));
  assertFalse(notaryContract.getCreator().isAllowedForKeys(stepaPublicKeys));
  assertTrue(notaryContract.getExpiresAt().isAfter(ZonedDateTime.now().plusMonths(3)));
  assertTrue(notaryContract.getCreatedAt().isBefore(ZonedDateTime.now()));
  assertTrue(notaryContract.isPermitted("revoke", stepaPublicKeys));
  assertTrue(notaryContract.isPermitted("revoke", martyPublicKeys));
  assertTrue(notaryContract.isPermitted("change_owner", stepaPublicKeys));
  assertFalse(notaryContract.isPermitted("change_owner", martyPublicKeys));
}

@Test
public void registerSimpleContractWhite() throws Exception {
  Contract whiteContract = new Contract(TestKeys.privateKey(0));
  whiteContract.seal();
  System.out.println("whiteClient.register(whiteContract)...");
  ItemResult itemResult = whiteClient.register(whiteContract.getPackedTransaction(), 5000);
  System.out.println("whiteClient.register(whiteContract)... done! itemResult: " + itemResult.state);
  itemResult = whiteClient.getState(whiteContract.getId());
  System.out.println("whiteClient.getState(whiteContract): " + itemResult.state);
  assertEquals(ItemState.APPROVED, itemResult.state);
}

@Test
public void references() throws Exception {
  Contract contract = new Contract(TestKeys.privateKey(0));
  String js = "";
  js += "print('references');";
  js += "var ref = jsApi.getReferenceBuilder().createReference('EXISTING_STATE');";
  js += "ref.setConditions({'all_of':['ref.issuer=="+TestKeys.publicKey(1).getShortAddress().toString()+"']});";
  js += "jsApi.getCurrentContract().addReference(ref);";
  contract.getState().setJS(js.getBytes(), "client script.js", new JSApiScriptParameters());
  contract.seal();
  contract = Contract.fromPackedTransaction(contract.getPackedTransaction());
  Contract batchContract = new Contract(TestKeys.privateKey(3));
  batchContract.addNewItems(contract);
  batchContract.seal();
  assertTrue(batchContract.check());
  contract.execJS(new JSApiExecOptions(), js.getBytes());
  contract.seal();
  batchContract.seal();
  assertFalse(batchContract.check());
}

@Test
public void issuerTest() throws Exception {
  KeyAddress keyAddress1 = TestKeys.privateKey(0).getPublicKey().getShortAddress();
  KeyAddress keyAddress2 = TestKeys.privateKey(1).getPublicKey().getShortAddress();
  Contract contract = new Contract(TestKeys.privateKey(2));
  contract.setCreatorKeys(keyAddress1);
  contract.setIssuerKeys(keyAddress2);
  contract.addSignerKey(TestKeys.privateKey(0));
  contract.seal();
  assertFalse(contract.check());
  contract.setIssuerKeys(keyAddress1);
  contract.getErrors().clear();
  contract.seal();
  assertTrue(contract.check());
}

@Test
public void registerSimpleContract_getStateOnly() throws Exception {
  Set<PrivateKey> stepaPrivateKeys = new HashSet<>();
  Set<PublicKey> stepaPublicKeys = new HashSet<>();
  stepaPrivateKeys.add(new PrivateKey(Do.read(ROOT_PATH + "keys/stepan_mamontov.private.unikey")));
  for (PrivateKey pk : stepaPrivateKeys) {
    stepaPublicKeys.add(pk.getPublicKey());
  }
  Contract stepaCoins = Contract.fromDslFile(ROOT_PATH + "stepaCoins.yml");
  stepaCoins.addSignerKey(stepaPrivateKeys.iterator().next());
  stepaCoins.seal();
  ItemResult itemResult = nodeClient.getState(stepaCoins.getId());
  System.out.println("nodeClient.getState(stepaCoins): " + itemResult.state);
  assertEquals(ItemState.APPROVED, itemResult.state);
}

  @Test
  public void goodRevoke() throws Exception {
    Contract c = Contract.fromDslFile(rootPath + "simple_root_contract.yml");
    c.addSignerKeyFromFile(rootPath+"_xer0yfe2nn1xthc.private.unikey");
    PrivateKey goodKey = c.getKeysToSignWith().iterator().next();
    c.setOwnerKeys(new KeyRecord(goodKey.getPublicKey()));
    c.seal();

    Contract revokeContract = c.createRevocation(goodKey);

    revokeContract.check();
    assertTrue(revokeContract.isOk());
//        tc.traceErrors();
  }

  public TestContracts invoke() throws EncryptionError, Quantiser.QuantiserException {
    r0 = new Contract(TestKeys.privateKey(0));
    r0.seal();
    c = r0.createRevision(TestKeys.privateKey(0));
    n0 = new Contract(TestKeys.privateKey(0));
    n1 = new Contract(TestKeys.privateKey(0));
    c.addNewItems(n0);
    c.addNewItems(n1);
    c.seal();
    return this;
  }
}

  stepaPublicKeys.add(pk.getPublicKey());
Contract baseContract = Contract.fromDslFile(ROOT_PATH + "DeLoreanOwnership.yml");
PrivateKey manufacturePrivateKey = new PrivateKey(Do.read(ROOT_PATH + "_xer0yfe2nn1xthc.private.unikey"));
baseContract.addSignerKey(manufacturePrivateKey);
baseContract.seal();
System.out.println("Base contract contract is valid: " + baseContract.isOk());
twoSignContract.addSignatureToSeal(stepaPrivateKeys);
twoSignContract.check();
twoSignContract.traceErrors();
registerAndCheckDeclined(twoSignContract);
twoSignContract.addSignatureToSeal(martyPrivateKeys);
twoSignContract.check();
twoSignContract.traceErrors();
System.out.println("Contract with two signature is valid: " + twoSignContract.isOk());
registerAndCheckApproved(twoSignContract);

@Test(timeout = 15000)
public void resyncApproved() throws Exception {
  Contract c = new Contract(TestKeys.privateKey(0));
  c.seal();
  addToAllLedgers(c, ItemState.APPROVED);
  node.getLedger().getRecord(c.getId()).destroy();
  assertEquals(ItemState.UNDEFINED, node.checkItem(c.getId()).state);
  node.resync(c.getId());
  assertEquals(ItemState.APPROVED, node.waitItem(c.getId(), 15000).state);
}

public void asd() throws Exception {
  PrivateKey key = new PrivateKey(Do.read("/Users/romanu/Downloads/ru/roman.uskov.privateKey.unikey"));
  Set<PrivateKey> issuers = new HashSet<>();
  issuers.add(key);
  Set<PublicKey> owners = new HashSet<>();
  owners.add(key.getPublicKey());
  TestSpace testSpace = prepareTestSpace();
  testSpace.nodes.forEach(n->n.config.setIsFreeRegistrationsAllowedFromYaml(true));
  for(int i = 109; i < 110; i++) {
    Contract c = ContractsService.createTokenContract(issuers, owners, new BigDecimal("100000.9"), new BigDecimal("0.01"));
    c.setIssuerKeys(key.getPublicKey().getShortAddress());
    c.setCreatorKeys(key.getPublicKey().getShortAddress());
    c.setExpiresAt(ZonedDateTime.now().plusDays(10));
    c.seal();
    new FileOutputStream("/Users/romanu/Downloads/ru/token"+i+".unicon").write(c.getPackedTransaction());
    assertEquals(testSpace.client.register(Contract.fromPackedTransaction(Do.read("/Users/romanu/Downloads/ru/token"+i+".unicon")).getPackedTransaction(),10000).state,ItemState.APPROVED);
  }
}

  @Test
  public void checkAnonymizingRole() throws Exception {

    PrivateKey key = new PrivateKey(Do.read(PRIVATE_KEY_PATH));
    Contract contract = createCoin100apiv3();
    contract.addSignerKey(key);
    sealCheckTrace(contract, true);

    assertTrue(contract.getIssuer().getKeys().contains(key.getPublicKey()));

    contract.anonymizeRole("issuer");
    contract.anonymizeRole("owner");
    contract.seal();

    assertFalse(contract.getIssuer().getKeys().contains(key.getPublicKey()));

    Contract anonPublishedContract = new Contract(contract.getLastSealedBinary());

    assertFalse(anonPublishedContract.getIssuer().getKeys().contains(key.getPublicKey()));
//        assertFalse(anonPublishedContract.getSealedByKeys().contains(key.getPublicKey()));
  }

private Contract basicContractCreation(final String fileName, final String keyFileName, final PrivateKey key) throws Exception {
  Contract c = Contract.fromDslFile(rootPath + fileName);
  c.setOwnerKey(key);
  c.addSignerKeyFromFile(rootPath + keyFileName);
  c.seal();
  c.check();
  c.traceErrors();
  assertTrue(c.check());
  return c;
}

@Test
public void checkPaymentContract() throws Exception {
  // to register manually, execute from deploy project:
  // bin/sql_all pro "insert into ledger(hash,state,created_at, expires_at, locked_by_id) values(decode('9186C0A9E9471E4559E74B5DAC3DBBB8445807DF80CAE4CE06FDB6588FAEBA1CE004AD378BEF3C445DECF3375E3CA5FD16227DBE5831A21207BB1BD21C85F30D0CED014E152F77E62082E0442FBD9FD2458C20778F7501B5D425AF9984062E54','hex'),'4','1520977039','1552513039','0');"
  // to erase all ledgers, execute:
  // bin/sql_all pro "truncate table ledger"
  // (after erasing ledgers, items still stay in cache -> need to restart (or redeploy) nodes)
  Contract contract = paymentContract;
  contract.check();
  System.out.println("uno bin: " + Base64.encodeString(contract.getPackedTransaction()));
  System.out.println("uno hashId: " + Bytes.toHex(contract.getId().getDigest()).replace(" ", ""));
  System.out.println("approved ord: " + ItemState.APPROVED.ordinal());
  System.out.println("getCreatedAt: " + StateRecord.unixTime(contract.getCreatedAt()));
  System.out.println("getExpiresAt: " + StateRecord.unixTime(contract.getExpiresAt()));
  ItemResult itemResult = normalClient.getState(contract.getId());
  System.out.println("getState... done! itemResult: " + itemResult.state);
}

Most used methods

<init>
Extract old, deprecated v2 self-contained binary partially unpacked by the TransactionPack, and fill
addNewItems
Add one or more siblings to the contract. Note that those must be sealed before calling #seal() or #
addSignerKey
Add private key to keys contract binary to be signed with when sealed next time. It is called before
getExpiresAt
Get contract expiration time
getId
Get the id sealing self if need
getPackedTransaction
Pack the contract to the most modern .unicon format, same as TransactionPack#pack(). Uses bounded Tr
registerRole
Register new role. Name must be unique otherwise existing role will be overwritten
seal
Seal contract to binary. This call adds signatures from #getKeysToSignWith()
addSignatureToSeal
Add signature to sealed (before) contract. Do not deserializing or changing contract bytes, but will
check
createRevision
Create new revision to be changed, signed sealed and then ready to approve. Created "revision" contr
fromDslFile
Create contract importing its parameters with passed .yaml file. No signatures are added automatical

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How to useContract in com.icodici.universa.contract

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