fix: ABI decoder - crashing during the attempt to use data slices

[JeneaVranceanu]

Summary of Changes

Fixing ABI decoding issues. This PR is a combination of #803 and #802.

Test Data or Screenshots

By submitting this pull request, you are confirming the following:

• I have reviewed the Contribution Guidelines.
• I have performed a self-review of my own code.
• I have updated my repository to match the develop branch.
• I have included test data or screenshots that prove my fix is effective or that my feature works.
• I have checked that all tests work and swiftlint is not throwing any errors/warnings.

[JeneaVranceanu]

@6od9i @zhangliugang I've combined your branches in this PR. Will change a few things and pass it for review to @yaroslavyaroslav and @janndriessen
@yaroslavyaroslav @janndriessen Both of #803 and #802 were reviewed previously so this branch is created just because there are 2 tests that were duplicated in these PRs. But that was a requirement as it was proof that the fixes are correct.