Examples with Function org.web3j.abi.datatypes.Function used on opensource projects

Example 1 with Function

use of org.web3j.abi.datatypes.Function in project jbpm-work-items by kiegroup.

the class EthereumUtils method queryExistingContract.

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;
    }
}

Example 2 with Function

use of org.web3j.abi.datatypes.Function in project jbpm-work-items by kiegroup.

the class EthereumUtils method getFunction.

public static Function getFunction(String queryName, List<Type> queryInputTypes, List<TypeReference<?>> queryOutputTypes) {
    List<Type> inputParameters;
    if (queryInputTypes != null) {
        inputParameters = queryInputTypes;
    } else {
        inputParameters = new ArrayList<>();
    }
    List<TypeReference<?>> outputTypes;
    if (queryOutputTypes != null) {
        outputTypes = queryOutputTypes;
    } else {
        outputTypes = new ArrayList<>();
    }
    Function function = new Function(queryName, inputParameters, outputTypes);
    return function;
}