gre: refactor to allow using L1 and L2 simultaneously

[tmigone]

This PR adds support to GRE to allow using L1 and L2 chains simultaneously. This greatly simplifies interacting with the protocol.

Note that this is on hardhat's roadmap (see NomicFoundation/hardhat#2797) but it's going to take a while before it's ready.

Relevant docs with more information:

• https://www.notion.so/edgeandnode/Multilayer-support-for-GRE-b2e41614822f453d89f47fa83afe9b95
• README.md file in gre folder

Fixes GRT-8

[abarmat]

Looking good

[codecov]

Codecov Report

Merging #682 (37cddd3) into dev (5232fd3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #682   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files          35       35           
  Lines        1762     1762           
  Branches      296      296           
=======================================
  Hits         1592     1592           
  Misses        170      170           

Flag	Coverage Δ
unittests	90.35% <ø> (ø)

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[abarmat]

Congrats @tmigone this is looking great

[abarmat]

What is this? :)

[tmigone]

I knew you would ask ;)

The plugin tests run with mocha (and not with hh test), this is needed for mocha to support typescript files.

On a more general note, I based the GRE folder on hardhat's plugin boilerplate https://github.com/NomicFoundation/hardhat-ts-plugin-boilerplate/, once GRE is mature I think it makes sense to fork it into it's own repository so each repo is nice and tidy and not polluted with too much stuff.

[abarmat]

Is the isHHL2 ever used? as the first isHHL1 is binary. Or this is just included for symmetry?

[tmigone]

No, isHHL2 is not used (though you could use it down the line). Just included as you say for symmetry. Perhaps we can remove it and rename the isHHL1 variable to something else but I struggled to find a good name.

[abarmat]

💯

[abarmat]

@tmigone what are the empty config files under gre/test/files, are those for existence tests?

[tmigone]

@tmigone what are the empty config files under gre/test/files, are those for existence tests?

Exactly. The tests are mainly to verify the plugin does path resolution correctly since there are a lot of cases to evaluate (and files need to exist to avoid erroring out). The contents of the files don't really matter as here we don't go that far so I figured it was better to leave them empty.

[abarmat]

Fixes GRT-8

[linear]

GRT-8 Multi-chain GRE