Where is Apollo federation validation code?

I’m implementing some apollo federation validation in Elixir and I found that both rover and gateway can do some validation as well. But I found that in the
apollographql GitHub organization I can’t find the implementation code for validation.

Where is the implementation code for these error codes?

The code for the validations lives in the federation repository. The exact location will depend on whether you’re using the Federation 2 alpha, or the current stable Federation:

(the main branch is federation v2 alpha and version-0.x is the current stable release line)

I hope this helps!

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Thank you so much, Jesse

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