While going through the web3j docs in most of the places below deploy method is used.

YourSmartContract contract = YourSmartContract.deploy(
        <web3j>, <credentials>,
        GAS_PRICE, GAS_LIMIT,
        <param1>, ..., <paramN>).send();  // constructor params

This method is deprecated in latest web3j library and instead of this we should use below method is docs.

YourSmartContract contract = YourSmartContract.deploy(
        <web3j>, <credentials>,
        <contractGasProvider>,
        <param1>, ..., <paramN>).send();  // constructor params

https://github.com/web3j/web3j-docs/blob/master/docs/companies_using_web3j.md

If you can add @freight-trust to the list as well, thanks.

In page Web3j -> Getting Started -> Run a node locally
The command to install besu has the switch ----network, it should be --network

I want to load the wallet flexibly like the front-end page(web3.js), instead of loading the wallet only through keystore and privatekey.

For example, after I connect the wallet through web3.js on the front-end page, how can I make Java load the wallet through web3j dependency?

Docs give opportunity to edit

e.g. on http://docs.web3j.io/4.8.7/getting_started/pub_sub/
the edit link is https://github.com/web3j/web3j/edit/master/docs/getting_started/pub_sub.md
that is incorrect, it should point to this repo.

Hello i have a problem with web3j.

I have installed it from here: https://docs.web3j.io/4.8.7/command_line_tools/ but when I run
the command in title it will return me:

by Web3Labs
[ \ ] Creating and building project ... Subsequent builds will be faster
Project generation Failed. Check log file for more information.

in log:

FAILURE: Build failed with an exception.

* What went wrong:
Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 258ms

I am using M1 pro MacBook 16

in this page:http://docs.web3j.io/latest/getting_started/deploy_interact_smart_contracts/#working-with-smart-contracts-and-java-smart-contract-wrappers
the command of generate wrapper is wrong, please help me fix it.

In https://docs.web3j.io/4.8.7/quickstart/#maven-plugin, do references to version 4.8.1 of web3j-maven-plugin but this version does not exist in mvnrepository (https://mvnrepository.com/artifact/org.web3j/web3j-maven-plugin) neither releases page of own project: https://github.com/web3j/web3j-maven-plugin/releases.

The correct version is 4.8.2, present in mvnrepository and release page.

On Filters and Flowables page http://docs.web3j.io/4.8.7/getting_started/pub_sub/
There is code with Subscription

Subscription subscription = web3j.blockFlowable(false).subscribe(block -> {

1. but it is not clear what exact class is too import
2. It is different from actual io.reactivex.disposables.Disposable

For more security, can you change old spongycastle (based on old bouncycastle) to bouncycastle?

• https://www.bouncycastle.org/
• https://www.bouncycastle.org/releasenotes.html
• http://www.bouncycastle.org/latest_releases.html
• https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=bouncy%20castle
• https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=bouncycastle
• https://www.cvedetails.com/vulnerability-list/vendor_id-7637/Bouncycastle.html