My sample web3j java project was running fine but suddenly I started getting this error when I ran my vanilla Java project with web3j as a dependency (not sure what I changed except the installed Java version in my system). The error was :
Error: Expected identifier, got 'LParen' constructor() {I am actually not sure what the problem is here as the files compile fine but when I run my java project, I get the above error. So, what maybe the problem here? Any hints?
is there a work around ?
org.web3j.protocol.core.filters.Filter : The filter has not been found. F
refer my solution here : https://github.com/ethereum/go-ethereum/issues/21386#issuecomment-723992023 working perfectly fine from last few months.
when i do something like:
EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST,
DefaultBlockParameterName.LATEST, tokenAddr);
web3.ethLogFlowable(filter).subscribe(log -> System.out.println(log.toString()));
i'm getting a NPE exception here:
EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST,
DefaultBlockParameterName.LATEST, list);
web3.ethLogFlowable(filter).subscribe(log -> System.out.println(log.toString()));
sorry, the stack trace/exception message was as such:
Caused by: java.lang.NullPointerException
at org.web3j.protocol.core.filters.LogFilter.process(LogFilter.java:46)
at org.web3j.protocol.core.filters.Filter.getInitialFilterLogs(Filter.java:119)
at org.web3j.protocol.core.filters.Filter.run(Filter.java:69)
at org.web3j.protocol.rx.JsonRpc2_0Rx.run(JsonRpc2_0Rx.java:89)
at org.web3j.protocol.rx.JsonRpc2_0Rx.lambda$ethLogFlowable$2(JsonRpc2_0Rx.java:79)
at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:71)
Hi!
I try deploy the contract in binance smart chain through web3j. But I doesn't understand how calculating gas price and gas limit.
When I run this example, I get this error: "Error processing transaction request: tx fee (1.00 ether) exceeds the configured cap (1.00 ether)"
val web3j = Web3j.build(HttpService("https://data-seed-prebsc-1-s1.binance.org:8545"))
val credentials = WalletUtils.loadBip39Credentials(
"pass",
"mnemonic"
)
val gasLimit = web3j.ethGetBlockByNumber(DefaultBlockParameterName.LATEST, false)
.send()
.getBlock()
.gasLimit
val gasPrice = web3j.ethGasPrice().send().gasPrice
val newGasPrice = gasPrice.toBigDecimal() * 3.3333333335.toBigDecimal()
val contract = TokenERC20.deploy(
web3j,
FastRawTransactionManager(web3j, credentials, 97),
StaticGasProvider(newGasPrice.toBigInteger(), gasLimit)
).send()
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you want from Web3.providers
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}
// Our future code here..
// web3.eth.defaultAccount = web3.eth.accounts[0];
var addr = '0x774e44c7bc4c24183f379712B9a55d2bD3280fee';
var aBCContract = new web3.eth.Contract(abi, addr);
$("#btnAddInvestorNft").click(function() {
var assetNft = $("#assetNft").val();
var investorAddr = $("#investorAddr").val();
var investorNft = $("#investorNft").val();
var NftValue = $("#NftValue").val();
aBCContract.methods.addiNft(assetNft,investorAddr,investorNft , NftValue);
});
Hello ! I am coming back to a project I have done 1-2 years ago and it seems that what was happening then, is not happening anymore... can it be due to some changes in versions or behaviours of classes?
I want to trigger some separate methods when a certain event is thrown. The module must work continuously and each time the event is thrown, I want to log a message. This is what was happening the first time I wrote the code, but now, it seems that it does not listen continuously to that event. If the program is running and I throw the event, it does not do anything. However, when I re-run the module, it sees the event and logs the below message. Again, it was detecting the event while the module was running, the first time I wrote the code. Does anyone have a clue why this is happening?
The pseudocode is like this:
-- get address then load the contract
-- load the previous block at which an event was detected and use it as parameter:
observeEvent(marketContractInstance, lastBlockNumber, web3j);
observeEvent(managerContractInstance, lastBlockNumber, web3j) {
DefaultBlockParameterNumber defaultBlockParameterNumber = new DefaultBlockParameterNumber(lastBlockNumber);
Flowable<MarketsManager.EnergyTypeOfMarketSessionEventResponse> obs = managerContractInstance.energyTypeOfMarketSessionEventFlowable(
defaultBlockParameterNumber, DefaultBlockParameterName.LATEST);
obs.subscribe(event -> {
LOGGER.log(Level.INFO, "observed insert market session event");
EthBlockNumber ethBlockNumber = web3j.ethBlockNumber().sendAsync().get();
BigInteger ethBlockNumberBigInt = ethBlockNumber.getBlockNumber();
if (ethBlockNumberBigInt.compareTo(lastBlockNumber) > 0) {
String lastBlockString = ethBlockNumberBigInt.intValue() + "";
LOGGER.log(Level.INFO, "Last block: " + lastBlockString);
EventListenerService.writeToFile(lastBlockString);
}
});}
-- I have also tried using EthFilter and subscribe, but the behaviour is exactly the same as described above.
I am using web3j 4.8.4, openethereum (the new name for parity) 3.0.