Stargate

[5A11]

This PR adds Stargate support for fetchai ledger.

Types of changes

What types of changes does your code introduce to agents-aea?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

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• I have read the CONTRIBUTING doc
• I am making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Lint and unit tests pass locally with my changes and CI passes too
• I have added tests that prove my fix is effective or that my feature works
• I have checked that code coverage does not decrease.
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

[codecov-commenter]

Codecov Report

Merging #2613 (3ded31f) into develop (3a5ddca) will increase coverage by 0.06%.
The diff coverage is 99.03%.

@@             Coverage Diff             @@
##           develop    #2613      +/-   ##
===========================================
+ Coverage    99.82%   99.89%   +0.06%     
===========================================
  Files          511      520       +9     
  Lines        35206    35682     +476     
===========================================
+ Hits         35146    35645     +499     
+ Misses          60       37      -23     

Flag	Coverage Δ
unittests	99.89% <99.03%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/fetchai/skills/http_echo/handlers.py	100.00% <ø> (ø)
packages/fetchai/skills/simple_oracle/handlers.py	100.00% <ø> (ø)
...ages/fetchai/skills/error_test_skill/behaviours.py	60.00% <60.00%> (ø)
aea/crypto/ledger_apis.py	100.00% <100.00%> (ø)
aea/helpers/serializers.py	100.00% <100.00%> (ø)
aea/manager/manager.py	100.00% <100.00%> (ø)
aea/manager/utils.py	100.00% <100.00%> (ø)
aea/test_tools/test_contract.py	98.78% <100.00%> (+4.18%)	⬆️
...ages/fetchai/connections/http_server/connection.py	100.00% <100.00%> (ø)
...kages/fetchai/connections/p2p_libp2p/connection.py	100.00% <100.00%> (ø)
... and 20 more

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[jrriehl]

I'll check on this, but I believe that Stargateworld does not have a random beacon, in which case this agent and skill would not work.

[jrriehl]

Looks good

[DavidMinarsch]

The idea was that the switch to stargate finally resolves the test failures. However, I observe quite a few and it is harder to see now where they come from. I suggest @solarw has a look to address them so that we have a green test run before we merge.

[5A11]

The idea was that the switch to stargate finally resolves the test failures. However, I observe quite a few and it is harder to see now where they come from. I suggest @solarw has a look to address them so that we have a green test run before we merge.

We have addressed all Stargate related failures. There is none in this PR.
The failures are either:
a) public DHT related: waiting for prod to be synced with latest ACN changes.
b) multi aea manager related: @solarw is looking into those.
c) odd failures here and there: also @solarw is looking into those.