First create a global unique userid


Site userid:
https://macgirvin.com/1

$guuid = base64url_encode(hash('whirlpool','https://macgirvin.com/1.' . mt_rand(1000000,9999999),1);


Then create a hashed site destination.

$gduid = base64url_encode(hash('whirlpool', $guuid . 'https://macgirvin.com',1);

These two keys will identify you as a person+site pair in the future.
You will also obtain a password upon introducing yourself to a site.
This can be used to edit locations in the future. You will always keep your global unique userid


Introduce yourself to a site:


POST https://example.com/post

{
'type' => 'register'
'person' => $guuid
'address' => $gduid
'site' => 'https://macgirvin.com'
'info' => 'mike@macgirvin.com'
}

Returns:

{
'success' => 'true'
'pass' => me_encrypt($random_string)
}

---
Add location
---

POST https://example.com

{
'type' => 'location'
'person' => $guuid
'address' => $new_gduid
'site' => 'https://newsite.com'
'info' => 'mike@macgirvin.com'
'pass' => me_encrypt($gduid . '.' . $pass)
}

Returns:

{
'success' => 'true'
'pass' => me_encrypt($random_string)
}

---
Remove location
---

POST https://example.com

{
'type' => 'remove_location'
'person' => $guuid
'address' => $gduid
'pass' => me_encrypt($pass)
}

Returns:

{
'success' => 'true'
'message' => 'OK'
}


------------
Make friends
------------
This message may be reversed/repeated by the destination site to confirm


POST https://example.com/post

{
'type' => 'contact_add'
'person' => $gduid
'address' => $guuid
'target' => 'bobjones@example.com'
'flags' => HIDDEN=0,FOLLOW=1,SHARE=1
'confirm' => me_encrypt($guuid . '.' . $pass)
}

Returns:

{
'success' => 'true'
'message' => 'OK'
}







-------
Message
-------

POST https://example.com/post

{
'type' => 'post'
'person' => $guuid
'address' => $gduid
'post' => $post_id
}

Returns:
{
'success' => 'true'
'message' => 'OK'
}


--------
Callback
--------

POST https://macgirvin.com

{
'retrieve' => $post_id
'challenge' => you_encrypt('abc123')
'verify' => me_encrypt('xyz456' . '.' . $gduid)
}

Returns:

{
'success' => 'true'
'message' => 'OK'
'response' => 'abc123'
'data' => encrypted or raw structured post
}