Fix ApiHeadChange type

[elmattic]

Summary of changes

Changes introduced in this pull request:

• Fix ApiHeadChange type

Reference issue to close (if applicable)

Closes #4371, #4002

Other information and links

The endpoint code is only being manually tested at the moment. I've attached the script used and what the result files look like once you have run it (using node index.js).
index.txt
forest.log
lotus.log

In the attached log files, we should have an exact match for notifications of the type "current". We should have a match for notifications of type "apply" when Val.Cids values are the same.

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

[LesnyRumcajs]

@alt-ivan could you please confirm that this change works for you?

[alt-ivan]

@LesnyRumcajs
Sorry, I haven't been able to test yet due to other obligations. I will test on Monday and report back here.

[alt-ivan]

@LesnyRumcajs
I have finally got around to testing this and the type change introduced in this PR works.
However I found some other ChainNotify issues, opened an issue here: #4371

[elmattic]

@alt-ivan Many thanks for reporting this issue. I've committed a patch in this PR that should fix #4371.

Let me know if everything works well for you.

[alt-ivan]

@elmattic
You are welcome! I re-tested and left a comment on the issue

[elmattic]

@alt-ivan I've committed a fix to properly support several WS clients. Can you have a second look? I've tested the following scenario on my side (on both macOS and Ubuntu):

• Two WS clients connect to the Forest node, where the second client creates two channels.

All three channel outputs look alike.

Channel cancellation works properly.

[alt-ivan]

@elmattic

Awesome, thanks! I'll report back here as soon as I re-test everything

[alt-ivan]

@elmattic

Hi, I have re-tested and can confirm that everything works as expected. I apologize for the delay!

[elmattic]

Hi, I have re-tested and can confirm that everything works as expected. I apologize for the delay!

No worries! Thanks for your help with the testing.