6 | Field | Description | Type | Null | Key | Default | Extra |
7 | ----------- | ------------- | ------------ | ---- | --- | ------- | -------------- |
8 | id | sequential ID | int unsigned | NO | PRI | NULL | auto_increment |
9 | challenge | | varchar(255) | NO | | | |
10 | dfrn-id | | varchar(255) | NO | | | |
11 | expire | | int unsigned | NO | | 0 | |
12 | type | | varchar(255) | NO | | | |
13 | last_update | | varchar(255) | NO | | | |
15 Return to [database documentation](help/database)