I made sure the RPC URL definitely starts with wss, but Web3j still keeps fetching blocks at specific intervals instead of receiving them in real time. Do I need to call a different method? My Web3j ...

I'm working on an integration with PancakeSwap using Java and Web3J. All my tests were conducted on BSC Testnet. After conducting some research, I used the UI to perform a transaction that went ...

Body: I'm working on a Spring Boot project that interacts with Ethereum smart contracts. I'm using Web3j to compile Solidity contracts and generate ABI, binary files, and Java wrapper classes. However,...

Now I am working with kotlin springboot and what I have to make is that bridge feature. Bridge contract has already been deployed. Please tell me how to connect with smart contract in Kotlin ...

I have created code to execute a UserOperation using Alchemy's API. In order to sign UserOperation, I have created the following code to sign it, and the following execution results Need help. Code: -...

import com.amazonaws.auth.AWSStaticCredentialsProvider; import com.amazonaws.auth.BasicAWSCredentials; import com.amazonaws.regions.Regions; import com.amazonaws.services.kms.AWSKMS; import com....

I am using this dependency <!-- https://mvnrepository.com/artifact/org.web3j/core --> <dependency> <groupId>org.web3j</groupId> <artifactId>core</artifactId>...

I am trying to make a transfer using the function sendFundsEIP1559() from the org.web3j.tx.Transfer package like this: org.web3j.tx.Transfer testTansfer = new org.web3j.tx.Transfer(web3j, ...

I have this project stopped because there is no way to solve the creating wallet step: https://github.com/EAG-es/crear_wallet_web3j Main code: public class Create_wallet_web3j extends ...

I am trying to deploy a proxy contract and it has the following constructor constructor(address beacon, bytes memory data,string memory assetId) These are the inputs I am trying to pass to this ...

I'm using the Web3j cli to generate a Java Wrapper for my ethereum smart contract. function withdraw() external payable { address _caller = msg.sender; uint256 _userBalance = ...

I'm developing an android app using android studio. I implemented web3j and successfully connected to ethereum using infura. I'm not sure how I can get the total supply of a specific coin. Tried using ...

I have created a simple demo rest service which queries Ethereum to get basic information. I am using the Web3j library version 5.0.0 https://mvnrepository.com/artifact/org.web3j/core/5.0.0 I have ...

I need to view NFT-image with all metadata. I decide to call tokenURI() function like it, but it's ain't working private fun getNFTMetadata() = viewModelScope.launch(Dispatchers.IO){ //tokenURI --...

I've successfully deployed a contract using Optional<TransactionReceipt> receipt = Contract.deploy(...).send().getTransactionReceipt(); The receipt how ever doesn't return a timestamp. It ...