conveyor

Steemit API

Feature flags

Feature flags allows our apps (condenser mainly) to hide certain features behind flags.

Flags can be set individually for users or probabilistically to roll out a feature incrementally, for example set_flag_probability orange_theme 0.5 will enable the flag for ~50% of our users. Changing the flag probability does not re-randomize the user selection so that a user that had their flag enabled at 0.5 will still have it enabled when going to 0.75. This is achieved by seeding a PRNG with the shasum of username+flag.

Flags set individually per user always takes precedence.

API

get_feature_flags <username>

Get feature flags object for <username>.

Authenticated: requires signature of <username> or an admin account.

Returns: Key value mapping of feature flags, missing flags should be treated as false by the client.

{
    horse_hockey_minigame_unlocked: true,
    donovan_theme: false
}

get_feature_flag <username> <flag>

Get specific <flag> for <username>.

Authenticated: requires signature of or an admin account.

Returns: false/true

set_feature_flag <username> <flag> <true/false>

Set a <flag> override for <username>.

Authenticated: requires signature of an admin account.

set_feature_flag_probability <flag> <probability>

Set the <probability> expressed as a fraction 0.0 to 1.0 that a <flag> will resolve to true.

Authenticated: requires signature of an admin account.

get_feature_flag_probabilities

Get all the set flag probabilities.

Authenticated: requires signature of an admin account.

{
    horse_hockey_minigame_unlocked: 1.0,
    donovan_theme: 0.5,
    lucky_af: 0.0001
}

User data

Conveyor is the central point for storing sensitive user data (email, phone, etc). No other services should store this data and should instead query for it here every time.

API

get_user_data <username>

Return user data for <username>, returns an error if the account is not found.

Authenticated: requires signature of an admin account or the requested user.

{
    phone: '+1480080085',
    email: 'foo@bar.com'
}

set_user_data <username> <data>

Set user data for <username>.

Authenticated: requires signature of an admin account.

<data> is an object with the keys email and phone.

is_email_registered <email>

Check if the <email> address is in the database.

Authenticated: requires signature of an admin account.

Returns true or false

is_phone_registered <phone>

Check if the <phone> number is in the database.

Authenticated: requires signature of an admin account.

Returns true or false