a basic relay implementation based on relayer.
uses postgres, which I think must be over version 12 since it uses generated columns.
only accepts events from specific pubkeys defined via the environment variable WHITELIST (comma-separated).

running

grab a binary from the releases page and run it with the environment variable POSTGRESQL_DATABASE set to some postgres url:

POSTGRESQL_DATABASE=postgres://name:pass@localhost:5432/dbname ./relayer-whitelisted

it also accepts a HOST and a PORT environment variables.

compiling

if you know Go you already know this:

go install github.com/fiatjaf/relayer/whitelisted

or something like that.