Test: Eclair integration tests

[a-mpch]

This PR is part of #157

Bit of context

We would like to test paying offers from different implementations. We have different approaches to do here, adding submodules, building from source or use docker-compose like ldk node https://github.com/lightningdevkit/ldk-node/blob/main/docker-compose-cln.yml

What has been done

Add new simple test that spin up a network LND <-> LDK <-> Eclair. LND and LDK nodes are running in host machine while Eclair is inside docker-compose file specific for these tests.
After checking network is ready for doing payments, we generate an offer from Eclair and pay it from LNDK through the network.

These tests are behind a cfg(eclair_test) so won't be running through other itests.

Some considerations

Eclair does not have an official Image, I built images and uploaded to my own docker hub repository for ease of testing.

Added some docs to run the itest when developing and also macOS consideration because there isn't an images for arm either.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (7ea3713) to head (eb19633).

Additional details and impacted files

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##           master    #205   +/-   ##
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  Coverage    0.00%   0.00%           
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  Files           1       1           
  Lines         149     149           
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  Misses        149     149           

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[a-mpch]

Somehow running test in the GitHub action breaks the test, couldn't replicate it. I'll modify to run all inside the docker-compose so it's replicable anywhere. Drafting for now.

Running Eclair image in amd architecture panics from scpk issue. Running Eclair latests won't be stable.
Running LND with debugs inside the actions actually got a deadlock that break all tests.

[dunxen]

Somehow running test in the GitHub action breaks the test, couldn't replicate it. I'll modify to run all inside the docker-compose so it's replicable anywhere. Drafting for now.

Running Eclair image in amd architecture panics from scpk issue. Running Eclair latests won't be stable. Running LND with debugs inside the actions actually got a deadlock that break all tests.

Just ping us here when it's ready for a review :)

[a-mpch]

@dunxen sorry that I've been swarming you with reviews requests 😅! This one is ready

[dunxen]

@dunxen sorry that I've been swarming you with reviews requests 😅! This one is ready

No stress! Keep them coming and thanks for working on these!.

I'll take a look at this on Tuesday, the 29th. Out on a bush trip for the long weekend currently with choppy signal.

[dunxen]

Sorry for the delay. Still taking a closer look here.

[orbitalturtle]

I'll have some time to take a look this weekend. :)

EDIT: From a high level look, it's looking great, it'll be great to have these tests <3. But in the first commit it says "we generate an offer on Eclair without using blinding paths." I think it's important we have a test where Eclair does generate an offer with a blinded path.

[a-mpch]

@orbitalturtle thanks for taking the time to review this!

So I just force pushed and rewrote the commit message, we now are using blinded paths on the integration test 🙌🏼