I've just started using Web3j and am having some basic trouble. I've successfully figured out how to get an EthBlock and retrieve all of the information inside of it. I'd like to see the list of tr...

I am using web3j to query the Ethereum blockchain. Now I want to check if a transaction was mined or just sent to the network. How can I achieve this?

I am trying to call a custom function of a contract that expects a parameter of unit256. I'm calling this function from web3 with this value as parameter: 10000000000000000000 (10 with 18 zeros) As...

I need test ethereum for my pet project. I go to https://faucet.rinkeby.io/ , put a link with my tweet with my Ethereum address in MetaMask, choose 3 Ethers / 8 hours. The request was accepte...

I am using org.web3j (4.8.4) and Java 11. I have a smart contract deployed on Kovan network. I want to subscribe to all new events emitted after I call subscribe(...). I am not interested in events...

I trying to generate Ethereum addresses for the HD Wallet keys implemented with bitcoinj library, but I got confused: DeterministicSeed seed = new DeterministicSeed("some seed code here",...

When using the web3j lib for blockchain transaction in my private test blockchain I'm currently running into the titled response error: *insufficient funds for gas * price + value* The account fro...