PoA Network support

[youtweakit]

ETH-Hot-Wallet

Thank you for contributing!

Please open an issue before embarking on any significant pull request, especially those that add a new library or change existing tests, otherwise you risk spending a lot of time working on something that might not end up being merged into the project.

Before opening a pull request, please ensure:

• [x] double-check your branch is based on dev and targets dev
• [x] Pull request has tests (we are going for 100% coverage!)
• [x] Code is well-commented, linted and follows project conventions
• [ ] Documentation is updated (if necessary)
• [ ] Internal code generators and templates are updated (if necessary)
• [ ] Description explains the issue/use-case resolved and auto-closes related issues

Be kind to code reviewers, please try to keep pull requests as small and focused as possible :)

IMPORTANT: By submitting a patch, you agree to allow the project owners to license your work under the terms of the [MIT License].

[youtweakit]

I've copied my infura keys from another project. Is it important to keep any of them? )