Have you looked in to ethers.js?

[ricmoo]

Obviously I'm biased, but I think it handles your use cases. :)

https://github.com/ethers-io/ethers.js/tree/typescript

The TypeScript branch is currently available with npm install ethers@next, but should be the production release next week. It was JavaScript, but I spent the last month updating it to TypeScript. I will be adding a Types section to the documentation to cover the interfaces and types not covered by the rest of the documentation.

If there is functionality you think is missing, please let me know. :)

[holgerd77]

Hi Richard, this is Holger, currently the main maintainer for the various EthereumJS libraries, thanks for posting this, this generally looks extremely promising! I will have some break in the following 6-8 weeks and won't be able to be that much responsive during that time, but would be generally happy if we can get in exchange more and have a continued conversation on this.