API Key header not attached

[timrowley-dev]

The FTSO Fast Update client doesn't accept the API Key variable (other clients in the deployment package do). Therefore no x-apikey header is attached to requests and will be unable to use gated API's (it seems that the query param ?x-apikey=<key> doesn't work either. Therefore it's required to use a private node/unratelimited node for the Fast Updates client.

Missing configurations as demonstrated by the FSC:

• https://github.com/flare-foundation/flare-system-client/blob/8bc7613138f140435a0d1afa56f54cfa655c8bc1/client/config/protocols.go#L13
• https://github.com/flare-foundation/flare-system-client/blob/8bc7613138f140435a0d1afa56f54cfa655c8bc1/client/protocol/protocol_utils.go#L26

Fast Updates Client provides the ChainConfig struct with ApiKey definition but is not utilised:

• fast-updates/go-client/config/config.go

  Line 46 in f395e26

  ApiKey string `toml:"api_key" envconfig:"API_KEY"`

Issue based on debugging with external user.