[EPROD-642] Eth events scanning

[F3kilo]

Issue ticket

Issue ticket link:
https://infinityswap.atlassian.net/browse/EPROD-642

Checklist before requesting a review

Code conventions

• I have performed a self-review of my code
• Every new function is documented
• Object names are auto explicative
• The PR follows the project conventions
• The code follows the style guidelines of the project
• The code follows the project security best practices

Security

• The PR does not break APIs backward compatibility
• The PR does not break the stable storage backward compatibility

Testing

• Every function is properly unit tested
• I have added integration tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• IC endpoints are always tested through the canister_call! macro

[ufoscout]

@F3kilo there are conflicts to be resolved