Java Code Examples for org.web3j.abi.TypeReference

@Test
public void testCreation() {

    List<TypeReference<?>> parameters =
            Arrays.<TypeReference<?>>asList(
                    new TypeReference<Address>() {}, new TypeReference<Uint256>() {});
    Event event = new Event("testName", parameters);

    assertEquals(event.getName(), "testName");

    Iterator<TypeReference<?>> expectedParameter = parameters.iterator();
    for (TypeReference<?> actualParameter : event.getParameters()) {
        assertEquals(expectedParameter.next(), actualParameter);
    }

    assertEquals(0, event.getIndexedParameters().size());

    for (TypeReference<?> nonIndexedParameter : event.getNonIndexedParameters()) {
        assertEquals(false, nonIndexedParameter.isIndexed());
    }
}
 

public Observable<TransferEventResponse> transferEventObservable(DefaultBlockParameter startBlock, DefaultBlockParameter endBlock) {
    final Event event = new Event("Transfer", 
            Arrays.<TypeReference<?>>asList(new TypeReference<Bytes32>() {}),
            Arrays.<TypeReference<?>>asList(new TypeReference<Address>() {}));
    EthFilter filter = new EthFilter(startBlock, endBlock, getContractAddress());
    filter.addSingleTopic(EventEncoder.encode(event));
    return web3j.ethLogObservable(filter).map(new Func1<Log, TransferEventResponse>() {
        @Override
        public TransferEventResponse call(Log log) {
            EventValues eventValues = extractEventParameters(event, log);
            TransferEventResponse typedResponse = new TransferEventResponse();
            typedResponse.node = (byte[]) eventValues.getIndexedValues().get(0).getValue();
            typedResponse.owner = (String) eventValues.getNonIndexedValues().get(0).getValue();
            return typedResponse;
        }
    });
}
 

public RemoteCall<Tuple8<String, String, BigInteger, BigInteger, BigInteger, BigInteger, String, byte[]>> shipments(String param0) {
    final Function function = new Function(FUNC_SHIPMENTS, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(param0)), 
            Arrays.<TypeReference<?>>asList(new TypeReference<Address>() {}, new TypeReference<Address>() {}, new TypeReference<Uint256>() {}, new TypeReference<Uint256>() {}, new TypeReference<Uint8>() {}, new TypeReference<Uint256>() {}, new TypeReference<Utf8String>() {}, new TypeReference<Bytes32>() {}));
    return new RemoteCall<Tuple8<String, String, BigInteger, BigInteger, BigInteger, BigInteger, String, byte[]>>(
            new Callable<Tuple8<String, String, BigInteger, BigInteger, BigInteger, BigInteger, String, byte[]>>() {
                @Override
                public Tuple8<String, String, BigInteger, BigInteger, BigInteger, BigInteger, String, byte[]> call() throws Exception {
                    List<Type> results = executeCallMultipleValueReturn(function);
                    return new Tuple8<String, String, BigInteger, BigInteger, BigInteger, BigInteger, String, byte[]>(
                            (String) results.get(0).getValue(), 
                            (String) results.get(1).getValue(), 
                            (BigInteger) results.get(2).getValue(), 
                            (BigInteger) results.get(3).getValue(), 
                            (BigInteger) results.get(4).getValue(), 
                            (BigInteger) results.get(5).getValue(), 
                            (String) results.get(6).getValue(), 
                            (byte[]) results.get(7).getValue());
                }
            });
}
 

public RemoteCall<List> returnArray() {
    final Function function = new Function("returnArray", 
            java.util.Arrays.<Type>asList(), 
            java.util.Arrays.<TypeReference<?>>asList(new TypeReference<DynamicArray<Address>>() {}));
    return new RemoteCall<List>(
            new Callable<List>() {
                @Override
                @SuppressWarnings("unchecked")
                public List call() throws Exception {
                    List<Type> result = (List<Type>) executeCallSingleValueReturn(function, List.class);
                    return convertToNative(result);
                }
            });
}
 

public static byte[] createTokenTransferData(String to, BigInteger tokenAmount) {
    List<Type> params = Arrays.<Type>asList(new Address(to), new Uint256(tokenAmount));

    List<TypeReference<?>> returnTypes = Arrays.<TypeReference<?>>asList(new TypeReference<Bool>() {
    });

    Function function = new Function("transfer", params, returnTypes);
    String encodedFunction = FunctionEncoder.encode(function);
    return Numeric.hexStringToByteArray(Numeric.cleanHexPrefix(encodedFunction));
}
 

public RemoteFunctionCall<byte[]> getVersion() {
  final org.web3j.abi.datatypes.Function function =
      new org.web3j.abi.datatypes.Function(
          FUNC_GETVERSION,
          Arrays.<Type>asList(),
          Arrays.<TypeReference<?>>asList(new TypeReference<Bytes32>() {}));
  return executeRemoteCallSingleValueReturn(function, byte[].class);
}
 

private static void buildVariableLengthReturnFunctionConstructor(
        MethodSpec.Builder methodBuilder,
        String functionName,
        String inputParameters,
        List<TypeName> outputParameterTypes,
        boolean useUpperCase)
        throws ClassNotFoundException {

    List<Object> objects = new ArrayList<>();
    objects.add(Function.class);
    objects.add(Function.class);
    objects.add(funcNameToConst(functionName, useUpperCase));

    objects.add(Arrays.class);
    objects.add(Type.class);
    objects.add(inputParameters);

    objects.add(Arrays.class);
    objects.add(TypeReference.class);
    for (TypeName outputParameterType : outputParameterTypes) {
        objects.add(TypeReference.class);
        objects.add(outputParameterType);
    }

    String asListParams =
            Collection.join(outputParameterTypes, ", ", typeName -> "new $T<$T>() {}");

    methodBuilder.addStatement(
            "final $T function = new $T($N, \n$T.<$T>asList($L), \n$T"
                    + ".<$T<?>>asList("
                    + asListParams
                    + "))",
            objects.toArray());
}
 

public RemoteCall<TransactionReceipt> set(BigInteger x) {
    final Function function = new Function(
            FUNC_SET, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Uint256(x)), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public RemoteCall<TransactionReceipt> delegate(String to) {
    final Function function = new Function(
            FUNC_DELEGATE, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(to)),
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public RemoteCall<TransactionReceipt> transferFrom(String _from, String _to, BigInteger _tokenId, BigInteger weiValue) {
    final Function function = new Function(
            FUNC_TRANSFERFROM, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_from), 
            new org.web3j.abi.datatypes.Address(_to), 
            new org.web3j.abi.datatypes.generated.Uint256(_tokenId)), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function, weiValue);
}
 

public RemoteCall<BigInteger> allowance(String _owner, String _spender) {
    final Function function = new Function(FUNC_ALLOWANCE,
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_owner),
                    new org.web3j.abi.datatypes.Address(_spender)),
            Arrays.<TypeReference<?>>asList(new TypeReference<Uint256>() {}));
    return executeRemoteCallSingleValueReturn(function, BigInteger.class);
}
 

public RemoteFunctionCall<String> implementation() {
  final Function function =
      new Function(
          FUNC_IMPLEMENTATION,
          Arrays.<Type>asList(),
          Arrays.<TypeReference<?>>asList(new TypeReference<Address>() {}));
  return executeRemoteCallSingleValueReturn(function, String.class);
}
 

public RemoteFunctionCall<TransactionReceipt> removeParticipant(
    byte[] enclaveKey, byte[] account) {
  final Function function =
      new Function(
          FUNC_REMOVEPARTICIPANT,
          Arrays.<Type>asList(
              new org.web3j.abi.datatypes.generated.Bytes32(enclaveKey),
              new org.web3j.abi.datatypes.generated.Bytes32(account)),
          Collections.<TypeReference<?>>emptyList());
  return executeRemoteCallTransaction(function);
}
 

public List<ContentChangedEventResponse> getContentChangedEvents(TransactionReceipt transactionReceipt) {
    final Event event = new Event("ContentChanged", 
            Arrays.<TypeReference<?>>asList(new TypeReference<Bytes32>() {}),
            Arrays.<TypeReference<?>>asList(new TypeReference<Bytes32>() {}));
    List<EventValues> valueList = extractEventParameters(event, transactionReceipt);
    ArrayList<ContentChangedEventResponse> responses = new ArrayList<ContentChangedEventResponse>(valueList.size());
    for (EventValues eventValues : valueList) {
        ContentChangedEventResponse typedResponse = new ContentChangedEventResponse();
        typedResponse.node = (byte[]) eventValues.getIndexedValues().get(0).getValue();
        typedResponse.hash = (byte[]) eventValues.getNonIndexedValues().get(0).getValue();
        responses.add(typedResponse);
    }
    return responses;
}
 

public RemoteFunctionCall<String> sender() {
  final Function function =
      new Function(
          FUNC_SENDER,
          Arrays.<Type>asList(),
          Arrays.<TypeReference<?>>asList(new TypeReference<Address>() {}));
  return executeRemoteCallSingleValueReturn(function, String.class);
}
 

public RemoteCall<TransactionReceipt> kill() {
    final Function function = new Function(
            FUNC_KILL,
            Arrays.<Type>asList(),
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public RemoteCall<TransactionReceipt> set(final BigInteger value) {
  final Function function =
      new Function(
          FUNC_SET,
          Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Uint256(value)),
          Collections.<TypeReference<?>>emptyList());
  return executeRemoteCallTransaction(function);
}
 

public RemoteFunctionCall<List> returnArray() {
    final Function function = new Function(FUNC_RETURNARRAY, 
            java.util.Arrays.<Type>asList(), 
            java.util.Arrays.<TypeReference<?>>asList(new TypeReference<DynamicArray<Address>>() {}));
    return new RemoteFunctionCall<List>(function,
            new Callable<List>() {
                @Override
                @SuppressWarnings("unchecked")
                public List call() throws Exception {
                    List<Type> result = (List<Type>) executeCallSingleValueReturn(function, List.class);
                    return convertToNative(result);
                }
            });
}
 

public RemoteFunctionCall<TransactionReceipt> emitEventBytes16(byte[] bytes16Value) {
    final Function function = new Function(
            FUNC_EMITEVENTBYTES16, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Bytes16(bytes16Value)), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public static Object queryExistingContract(Credentials credentials,
                                           Web3j web3j,
                                           String contractAddress,
                                           String contractMethodName,
                                           List<Type> contractMethodInputTypes,
                                           List<TypeReference<?>> contractMethodOutputTypes
) throws Exception {

    Function function = getFunction(contractMethodName,
                                    contractMethodInputTypes,
                                    contractMethodOutputTypes);

    Transaction transaction = Transaction.createEthCallTransaction(credentials.getAddress(),
                                                                   contractAddress,
                                                                   getEncodedFunction(function));

    EthCall response = web3j.ethCall(
            transaction,
            DefaultBlockParameterName.LATEST).sendAsync().get();

    List<Type> responseTypeList = FunctionReturnDecoder.decode(
            response.getValue(),
            function.getOutputParameters());

    if (responseTypeList != null && responseTypeList.size() > 0) {
        return responseTypeList.get(0).getValue();
    } else {
        return null;
    }
}
 

public RemoteCall<TransactionReceipt> vote(BigInteger proposal) {
    final Function function = new Function(
            FUNC_VOTE, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Uint256(proposal)),
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public RemoteCall<TransactionReceipt> approve(String _spender, BigInteger _value) {
    final Function function = new Function(
            FUNC_APPROVE, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_spender), 
            new org.web3j.abi.datatypes.generated.Uint256(_value)), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public List<NameChangedEventResponse> getNameChangedEvents(TransactionReceipt transactionReceipt) {
    final Event event = new Event("NameChanged", 
            Arrays.<TypeReference<?>>asList(new TypeReference<Bytes32>() {}),
            Arrays.<TypeReference<?>>asList(new TypeReference<Utf8String>() {}));
    List<EventValues> valueList = extractEventParameters(event, transactionReceipt);
    ArrayList<NameChangedEventResponse> responses = new ArrayList<NameChangedEventResponse>(valueList.size());
    for (EventValues eventValues : valueList) {
        NameChangedEventResponse typedResponse = new NameChangedEventResponse();
        typedResponse.node = (byte[]) eventValues.getIndexedValues().get(0).getValue();
        typedResponse.name = (String) eventValues.getNonIndexedValues().get(0).getValue();
        responses.add(typedResponse);
    }
    return responses;
}
 

public RemoteCall<BigInteger> allowance(String _owner, String _spender) {
    final Function function = new Function(FUNC_ALLOWANCE, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_owner), 
            new org.web3j.abi.datatypes.Address(_spender)), 
            Arrays.<TypeReference<?>>asList(new TypeReference<Uint256>() {}));
    return executeRemoteCallSingleValueReturn(function, BigInteger.class);
}
 

private static CodeBlock buildVariableLengthEventInitializer(
        String eventName, List<NamedTypeName> parameterTypes) {

    List<Object> objects = new ArrayList<>();
    objects.add(Event.class);
    objects.add(eventName);

    objects.add(Arrays.class);
    objects.add(TypeReference.class);
    for (NamedTypeName parameterType : parameterTypes) {
        objects.add(TypeReference.class);
        objects.add(parameterType.getTypeName());
    }

    String asListParams =
            parameterTypes.stream()
                    .map(
                            type -> {
                                if (type.isIndexed()) {
                                    return "new $T<$T>(true) {}";
                                } else {
                                    return "new $T<$T>() {}";
                                }
                            })
                    .collect(Collectors.joining(", "));

    return CodeBlock.builder()
            .addStatement(
                    "new $T($S, \n" + "$T.<$T<?>>asList(" + asListParams + "))",
                    objects.toArray())
            .build();
}
 

public RemoteCall<TransactionReceipt> approveAndCall(String _spender, BigInteger _value, byte[] _extraData) {
    final Function function = new Function(
            "approveAndCall", 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_spender), 
            new org.web3j.abi.datatypes.generated.Uint256(_value), 
            new org.web3j.abi.datatypes.DynamicBytes(_extraData)), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

public RemoteCall<TransactionReceipt> transfer(String _to, BigInteger _value) {
    final Function function = new Function(
            FUNC_TRANSFER,
            Arrays.<Type>asList(new org.web3j.abi.datatypes.Address(_to),
                    new org.web3j.abi.datatypes.generated.Uint256(_value)),
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}
 

private static void buildVariableLengthReturnFunctionConstructor(
        MethodSpec.Builder methodBuilder, String functionName, String inputParameters,
        List<TypeName> outputParameterTypes) throws ClassNotFoundException {

    List<Object> objects = new ArrayList<>();
    objects.add(Function.class);
    objects.add(Function.class);
    objects.add(funcNameToConst(functionName));

    objects.add(Arrays.class);
    objects.add(Type.class);
    objects.add(inputParameters);

    objects.add(Arrays.class);
    objects.add(TypeReference.class);
    for (TypeName outputParameterType : outputParameterTypes) {
        objects.add(TypeReference.class);
        objects.add(outputParameterType);
    }

    String asListParams = Collection.join(
            outputParameterTypes,
            ", ",
            typeName -> "new $T<$T>() {}");

    methodBuilder.addStatement("final $T function = new $T($N, \n$T.<$T>asList($L), \n$T"
            + ".<$T<?>>asList("
            + asListParams + "))", objects.toArray());
}
 

public RemoteCall<String> text(byte[] node, String key) {
    final Function function = new Function(FUNC_TEXT, 
            Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Bytes32(node), 
            new org.web3j.abi.datatypes.Utf8String(key)), 
            Arrays.<TypeReference<?>>asList(new TypeReference<Utf8String>() {}));
    return executeRemoteCallSingleValueReturn(function, String.class);
}
 

public RemoteCall<TransactionReceipt> kill() {
    final Function function = new Function(
            "kill", 
            Arrays.<Type>asList(), 
            Collections.<TypeReference<?>>emptyList());
    return executeRemoteCallTransaction(function);
}