fix: flatten nested arrays in parseAbiParameters

[xenoliss]

Description

Hopefully fix #231

Additional Information

Introduce a DeepFlatten and use it in ParseAbiParameters instead of assuming that Filter<Mapped, never> has always only one element.

NOTE: I had to update parseAbiParameters to return abiParameters as unknown as ParseAbiParameters<TParams> for the compiler to be happy but waiting for feedback.

Before submitting this issue, please make sure you do the following.

• [x ] Read the contributing guide
• [x ] Added documentation related to the changes made.
• Added or updated tests (and snapshots) related to the changes made.

---

PR-Codex overview

This PR focuses on fixing type detection in ParseAbiParameters when using an array.

Detailed summary

• Fixed type detection issue with arrays in ParseAbiParameters
• Added DeepFlatten type for flattening arrays
• Updated documentation for DeepFlatten
• Improved parsing of human-readable ABI parameters to AbiParameter objects

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Latest commit: 9a03cf1

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Name	Status	Preview	Comments	Updated (UTC)
abitype	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 14, 2024 7:38am

[Raiden1411]

Can you add a test based on #231? You can use the provided playground as the base for the test. That way if there is a unforseen regression that test catches it.

[xenoliss]

Sure! I noticed the type tests are failing. I need to fix that as well when I find time. Any help/guidance is welcomed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.85%. Comparing base (6b2979f) to head (9ad4c80).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #232      +/-   ##
==========================================
+ Coverage   99.83%   99.85%   +0.01%     
==========================================
  Files          26       26              
  Lines        6082     6105      +23     
  Branches      195      195              
==========================================
+ Hits         6072     6096      +24     
  Misses          8        8              
+ Partials        2        1       -1     

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[Raiden1411]

@xenoliss since depth flatten returns a arraylist now you need to check if it's length is 0 instead of checking if the list member is undefined which was the previous implementation so that it shows as never for the parameters.

Something like this should work. But feel free to take any other approach

? Filter<Mapped, never> extends readonly [...infer Content]
  ? Content['length'] extends 0
    ? never
    : DeepFlatten<Content>
  : never
: never

[xenoliss]

Hey thank you @Raiden1411, I added your fix and it seems to work fine. I also added the playground test. Let me know how that looks to you.

[Raiden1411]

I think that the only thing that is missing is the changeset otherwise it looks good

[xenoliss]

I added the changeset @Raiden1411

[tmm]

Looking good! s/o @Raiden1411 for reviewing.

[tmm]

Suggested change

	Fix type detection when using an array in (encode|parse)AbiParameters
	Fixed type detection when using an array in `ParseAbiParameters`