Protocol Specification

This page gives an overview of how the internal of the atPlatform works.

Introduction #

The atProtocol is the underlying protocol that the atPlatform implements. It is a simple internet protocol for interacting with the atDirectory and atServer. The atPlatform builds on top of the atProtocol by taking full advantage of the features of the atProtocol.

See our Protocol Specification on our GitHub page under our at_protocol repository.

If you see a typo, mistake, or want to suggest a feature, please see our contributing guidelines. All contributions are welcome.

atDirectory #

The atDirectory provides a lookup of where an atServer for an atSign is running. This is similar to a DNS server.

When asking an atDirectory for the lookup of a particular atSign the atDirectory should respond with a null if the name does not exist and if the name exists the DNS name or address of the atServer and the IP port number for that atSign should be returned.

Response:

<host>:<port>

The atDirectory only has one verb - @exit and all other inputs are considered to be lookup requests.

atServer #

An atServer is where an atSign user’s personal data should be stored. One interacts with an atServer using the verbs exposed by the protocol.

An atServer should have 4 major sub components:

1. Key Store
2. Commit Log
3. Access Log
4. Notification Log

Verbs described in the document should be used to create, update, delete, and retrieve information from the above sub components.

1. Key Store #

Key store is a place where user data in an atServer should be saved as key and value pairs. Apart from the value, an atSign owner should be able to add certain metadata for a key.

Key #

A key in the atProtocol can be formed by using any alphanumeric and special characters (UTF-8) excluding “@”, “:” and a white space (" “). A key in an atServer can be any of the following 5 types:

1. Public Key

• A public key is a key which can be looked up by any atSign owner.
• A public key should be part of the scan verb result.
• Format of the public key should be public::<@sign>.

Example:

public:location@alice

The owner of the atServer should be allowed to update or delete the value of a public key.

2. Private Key

• A private key is a key which cannot be looked up by any atSign owner other than the one who created it.
• A private key should not be returned in a scan verb result.
• Format of the private key should be privatekey::<@sign>.

Example:

privatekey:pk1@alice

The owner of the atServer should be allowed to update or delete the value of a private key.

3. User key

• A user key can only be looked up by an atSign owner with whom the data has been shared.
• A user key should be part of the scan verb result only for the user who created it and the specific user it has been shared with.
• Format of the key shared with someone else should be <Shared with atSign>::<Created by atSign>.

Example:

@bob:phone@alice

Note: Above Key should be part of scan verb result only for @alice and @bob

The owner of the atServer should be allowed to update or delete the value of a user key.

4. Internal Key

• Internal keys start with an underscore(_) and are not displayed in scan results. Internal keys can be looked up only by the owner of the atServer.

5. Cached Key <! — TODO: Do we continue to use “atSign user or atSign owner? Especially with our “Person not user rule.

• A cached key is a key that was originally created by another atSign owner but is now cached on the atServer of another user’s atSign as they were given permission to cache it.
• A cached key should be listed in the scan verb result for the atSign user who cached it.
• Format of the key shared with someone else should be cached:<Shared with atSign>::<Created by atSign>.

Example:

cached:@bob:phone@alice

The person who has cached the key should not be allowed to update the cached key.

An atSign user who has created and shared the key should be allowed to update a cached key, and if the “autoNotify” config parameter is set to true, the updated value should be notified (please refer to the notify verb) and the cached key updated with the new value.

If the user who originally shared the keys set the CCD (Cascade delete) to true, the cached key will be deleted when the original key is deleted.

Value #

Text or binary values can be saved in an atServer. The size of the value saved in an atServer is bound by the config parameter “maxBufferSize”.

A user should be made aware of this limitation by using the stats verb.

If a binary value is being saved on an atServer, the “isBinary” attribute on the metadata should be set to true by the convention.

1. Reference Value

An atServer should support referencing another key’s value.

A reference value should be in the format “atsign://”.

For example, ‘phone@bob(key)’ is 1234 (value). Now another key called altPhone@bob can refer to phone@bob by referencing it as altPhone@bob == atsign://phone@bob.

When the user does a lookup on the key that contains a reference, the atServer should return a fully resolved value.

2. Metadata

Metadata of a key should describe the following properties of the value being inserted.

2. Commit Log #

An atServer should record any create, update, and delete operations in a commit log. The Commit Log should record these operations with a unique commit id so that users of the atServer can lookup operations that happened on or after a given commit id.

An atServer should provide a way to compact the Commit Log based on time and size.

3. Access Log #

An atServer should record the following user actions: user login, user authentication, and lookup. The Access Log should record these operations so that users of the atServer can retrieve various statistics such as the most visited atSign or most visited keys.

An atServer should provide a way to compact the Access Log based on time and size.

4. Notification Log #

An atServer should record any notifications that have been received and sent. Please check the notify verb specification for details on how a notification should be sent.

An atServer should provide a way to compact the Notification Log based on time and size.

Standard Keys #

An atServer should have the following standard keys:

Configuration Parameters #

An atserver should honor the following configuration parameters.

Block List #

A user of the atServer should be able to decide who is allowed to connect to their atServer. The config verb should be used to configure this. Once added, an atServer should honor the list at the time of accepting new connections from an atSign user using the from verb.

Verbs #

Verbs are commands you can execute on an atServer. Each verb interacts with the atServer in a different way. Some are for authentication, some are for data retrieval and some are for data manipulation. See the table below for more insight on which verb to use for what purpose.

The from verb #

Synopsis:

The from verb is used to tell an atServer whom you claim to be.

Following regex represents the syntax of the from verb:

r'^from:(?<@sign>@?[^@\s]+$)'

Example:

Telling the atServer that you are claiming to be @bob.

from:@bob

Response:

If the user who is trying to connect is the owner of the atServer, then the from verb should respond with the following response.

data:<sessionId@sign:uuid>

If the user who is trying to connect is not the owner of the atServer, then the from verb should respond with the following response.

proof:<sessionId>@<@sign>:<UUID>

If the user is not allowed to connect to the atServer, then it should respond back with the following error and close the connection to the server.

error:AT0013-Connection Exception

Description:

The from verb is used to tell the atServer what atSign you claim to be. With the from verb, one can connect to one’s own atServer or someone else’s atServer. In both cases, the atServer responds back with a challenge to prove that you are who you claim to be. This is part of the authentication mechanism of the atProtocol.

This authentication mechanism varies based on whether you are connecting to your own atServer (cram/pkam) or someone else’s atServer (pol).

Options:

<atSign> Required: Yes. atSign with which you are connecting to an atServer

The cram verb #

Synopsis:

The cram verb is used to bootstrap authenticate one’s own client as the owner of an atServer. It is intended to be used once until a set of PKI keys are cut on the owner’s mobile device and from then on we use the pkam verb.

The following regex represents the syntax of the cram verb:

r'^cram:(?<digest>.+$)'

Example:

cram:<digest>

Response:

If the user gets the challenge right, the prompt should change to the atSign of the user.

<atSign>@

If the user gets the cram authentication wrong, then it should respond back with the following error and close the connection to the server.

error:AT0401-Client authentication failed

Description:

The cram verb follows the from verb. As an owner of the atServer, you should be able to take the challenge thrown by the from verb and encrypt using the shared key that the server has been bound with. Upon receiving the cram verb along with the digest, the server decrypts the digest using the shared key and matches it with the challenge. If they are the same, then you can connect to the atServer and change the prompt to your atSign.

Options:

<digest> Required: Yes. Description: Encrypted challenge

The pkam verb #

Synopsis:

The pkam verb is used to authenticate one’s own client as an owner of an atServer using a PKI style authentication.

Following regex represents the syntax of the pkam verb:

^pkam:(?<signature>.+$)

Example:

pkam:<digest>

Response:

If the user gets the challenge right, the prompt should change to the atSign of the user.

<@sign>@

If the user gets the pkam authentication wrong, then it should respond back with the following error and close the connection to the server.

error:AT0401-Client authentication failed

Description:

The pkam verb follows the from verb. As an owner of the atServer, you should be able to take the challenge thrown by the from verb and encrypt using the private key of the RSA key pair with what the server has been bound with. Upon receiving the cram verb along with the digest, the server decrypts the digest using the public key and matches it with the challenge. If they are the same then the atServer lets you connect and changes the prompt to your atSign.

Options:

<digest> Required: Yes. Description: Encrypted challenge

The pol verb #

Synopsis:

The pol verb is part of the pkam process to authenticate oneself (as an atServer) while connecting to someone else’s atServer. The term ‘pol’ means ‘proof of life’ as it provides a near realtime assurance that the requestor is who it claims to be.

Following regex represents the syntax of the pol verb:

r'^pol$'

Example:

pol

Response::

If the atServer (you) gets the challenge right the prompt should change to the atSign of the user.

<@sign>@

If the atServer (you) gets the cram authentication wrong, then it should respond back with the following error and close the connection to the server.

error:AT0401-Client authentication failed

Description:

The pol verb follows the from verb. ‘pol’ indicates to another atServer that the atServer (you) who is trying to connect is ready to authenticate. For example, if @bob is trying to connect to @alice, @bob would take the key and value from the proof response of the verb and create a public key and value which then can be looked up by @alice. After @alice looks up @bob’s atServer, @alice’s atServer should change the prompt to @bob.

Options:

NA

The scan verb #

Synopsis:

The scan verb is used to see the keys in an atSign’s atServer. Following regex represents the syntax of the scan verb: r'^scan$|scan(:showhidden:(?<showhidden>true|false))?(:(?<forAtSign>@[^:@\s]+))?(:page:(?<page>\d+))?( (?<regex>\S+))?$'

Example:

View all keys in the atServer excluding hidden

scan

View all keys in the atServer including hidden

scan:showhidden:true

View all keys in the atServer filtered by a regex

scan <regex>

View all keys in the atServer including hidden and filtered by a regex

scan:showhidden:true <regex>

Response:

The atServer should return the keys within the atServer if the scan verb executed successfully. The atServer will respond accordingly to whether the atSign is authenticated or not. data:[<keys>]

The lookup verb #

Synopsis:

The lookup verb should be used to lookup the value shared by another atSign user.

The following is the regex of the lookup verb:

lookup:((?<operation>meta|all):)?(?<atKey>(?:[^:]).+)@(?<@sign>[^@\s]+)$

Example:

Look up the value of the key @<you>:phone@alice (the key is created and shared by @alice and lives on their atServer where the key is intentionally shared with you).

lookup:phone@alice

Look up the metadata of the key @<you>:phone@alice (key shared by @alice and shared with you).

lookup:meta:phone@alice

Look up both the value and the metadata of the key @<you>:phone@alice (key shared by @alice and shared with you).

lookup:all:phone@alice

Response:

If the operation is not specified the atServer should just respond back with the value saved by the user as is.

data:<value>

If the operation is to lookup the metadata only then the result should be wrapped in a JSON in the following format:

data:<Metadata in a JSON>

Example:

data: 
{
    "createdBy":"@bob",
    "updatedBy":"@bob",
    "createdAt":"2020-10-21 09:46:48.982Z",
    "updatedAt":"2020-10-21 09:46:48.982Z",
    "availableAt":"null",
    "expiresAt":"null",
    "refreshAt":"2020-10-21 09:46:58.982Z",
    "status":"active",
    "version":0,
    "ttl":null,
    "ttb":null,
    "ttr":10000,
    "ccd":false,
    "isBinary":false,
    "isEncrypted":false
 }

If the operation is to lookup the metadata and the data together, then the result should be wrapped in a JSON in the following format:

data:<Value and Metadata in a JSON>

Example:

data:
{
	"key":"@alice:country@bob",
	"data":"USA",
	"metaData":
	{
	 "createdBy":"@bob",
       "updatedBy":"@bob",
       "createdAt":"2020-10-21 09:46:48.982Z",
       "updatedAt":"2020-10-21 09:46:48.982Z",
       "availableAt":"null",
       "expiresAt":"null",
       "refreshAt":"2020-10-21 09:46:58.982Z",
       "status":"active",
       "version":0,
       "ttl":null,
       "ttb":null,
       "ttr":10000,
       "ccd":false,
       "isBinary":false,
       "isEncrypted":false
     }
}

If the other atServer on which the lookup needs to be performed is down then the atServer should return the following error and keep the connection alive.

error:AT0007-atServer not found.

If the lookup command is not valid, then the atServer should return the following error and close the connection:

error:AT0003-Invalid Syntax

For whatever reasons, If the handshake with another atServer fails, then the atServer should return the following error:

data:AT0008-Handshake failure

Description:

The lookup verb should be used to fetch the value of the key shared by another atSign user. If there is a public and user key with the same name then the result should be based on whether the user is trying to lookup is authenticated or not. If the user is authenticated then the user key has to be returned, otherwise the public key has to be returned.

The plookup verb #

Synopsis:

The plookup verb enables to lookup the value of the public key shared by another atSign user.

Following is the regex of the plookup verb:

^plookup:((?<operation>meta|all):)?(?<atKey>[^@\s]+)@(?<@sign>[^@\s]+)$

Example:

Look up the value of the key public:publickey@alice (the key is created and shared by @alice and lives on their atServer where the key is public).

plookup:publickey@alice

Look up the metadata of the public key

plookup:meta:publickey@alice

Look up both the value and the metadata of the public key

plookup:all:publickey@alice

Look up the value and metadata of the public key while bypassing the cache (i.e. the value will be fetched directly from the atServer instead of first checking for a cached key on your secondary).

plookup:bypassCache:true:all:publickey@alice

Response:

The atServer should return the value or metadata or the value and metadata together based on the option specified.

The response structure should be exactly the same as the lookup verb.

If the other atServer on which the lookup needs to be performed is not available, then the atServer should return the following error and keep the connection alive.

error:AT0007-atServer not found.

If the lookup command is not valid, then the atServer should return the following error and close the connection:

error:AT0003-Invalid Syntax

The llookup verb #

Synopsis:

The llookup verb should be used to look up one’s own atServer and this should return the value as is (i.e. without any resolution).

The following is the regex of the llookup verb:

^llookup:((?<operation>meta|all):)?(?:cached:)?((?:public:)|(@(?<for@sign>[^@:\s]-):))?(?<atKey>[^:]((?!:{2})[^@])+)@(?<@sign>[^@\s]+)$

Example:

Lookup the value of a public key that lives on your atServer

llookup:public:publickey@<you>

Lookup both the value and the metadata of a self key that lives on your atServer

llookup:all:phone@<you>

Lookup both the value and the metadata of a shared key (that is shared with @alice and created by @)

llookup:all:@alice:phone@<you>

Response:

The atServer should return the value or metadata or the value and metadata together based on the option specified.

The response structure should be exactly the same as the lookup verb.

If the other atServer on which the lookup needs to be performed is down then the atServer should return the following error and keep the connection alive.

error:AT0007-atServer not found.

If the lookup command is not valid, then the atServer should return the following error and close the connection:

error:AT0003-Invalid Syntax

Description:

The llookup verb should be used to fetch the value of the key in the owner’s atServer store as is without resolving it. For example if a key contains a reference as a value, the lookup verb should resolve it to a value whereas llookup should return the value as is.

Example:

If phone@bob is “1234” and altphone@bob is “atsign://phone@bob”, then lookup of altphone@bob should return “1234” where as llookup of altphone@bob should return “atsign://phone@bob”.

The update verb #

Synopsis:

The update verb is used to insert key/value pairs into a Key Store. An update can only be run by the owner of an atServer on his/her own atServer.

Following regex represents the syntax of the update verb:

r'^update:(?:ttl:(?<ttl>\d+):)?(?:ttb:(?<ttb>\d+):)?(?:ttr:(?<ttr>(-?)\d+):)?(ccd:(?<ccd>true|false):)?((?:public:)|(@(?<for@sign>[^@:\s]-):))?(?<atKey>[^:@]((?!:{2})[^@])+)(?:@(?<@sign>[^@\s]-))? (?<value>.+$)'

Example:

Put a key/value pair into the atServer with key location@bob and value bob's location value. This operation will create a new key if it does not already exist. If it already exists, it will overwrite the existing value.

update:location@bob bob's location value

Put a key/value pair into the atServer with key location@bob and value bob's location value but key expires in 10 minutes. The time to live of this key is 10 minutes.

update:ttl:600000:location@bob bob's location value but key expires in 10 minutes

Put a shared key/value pair into the atServer with key @alice:phone@bob (shared with @alice and shared by @bob) with value bob's phone number shared to @alice.

update:@alice:phone@bob bob's phone number shared to @alice

Response:

The atServer should return the commit id from Commit Log if the update is successful.

data:<CommitId>

If the user provides the invalid update command, then it should respond with the following error and close the connection to the server

error:AT0003-Invalid Syntax

Description:

The update verb should be used to perform create/update operations on the atServer. The update verb requires the owner of the atServer to authenticate himself/herself to the atServer using from and cram verbs.

If a key has been created for another atSign user, the atServer should honor “autoNotify” configuration parameter.

Options:

<ttl> Required: No. Description: Time to live in milliseconds.

<ttb> Required: No. Description: Time to birth in milliseconds.

<ttr> Required: No. Description: Time to refresh in milliseconds.

-1 is a valid value which indicates that the user with whom the key has been shared can keep it forever and the value for this key won’t change forever.

<ccd> Required: No. Description: A value of “true” indicates that the cached key needs to be deleted when the atSign user who has originally shared it deletes it.

<for@sign> Required: Yes, (Not required when the key is a public key). Description: atSign of the user with whom the key has been shared.

<@sign> Required: Yes. Description: atSign of the owner.

<value> Required: Yes. Description: Value for the key.

The update:meta verb #

Synopsis:

The update:meta verb should be used to update the metadata of a key atSign user without having to send or save the value again.

Following is the regex for the update:meta verb

^update:meta:((?:public:)|((?<forAtSign>@?[^@\s]-):))?(?<atKey>((?!:{2})[^@])+)@(?<atSign>[^@:\s]-)(:ttl:(?<ttl>\d+))?(:ttb:(?<ttb>\d+))?(:ttr:(?<ttr>\d+))?(:ccd:(?<ccd>true|false))?(:isBinary:(?<isBinary>true|false))?(:isEncrypted:(?<isEncrypted>true|false))?$

Example:

Update the metadata of key phone@bob setting isBinary:true while keeping all other metadata as it is.

update:meta:phone@bob:isBinary:true

Update the metadata of the shared key @alicephone@bob (shared with @alice & shared by @bob) setting ttl:600000, setting isBinary:true and isEncrypted:true while keeping all other metadata as it is.

update:meta:@alice:phone@bob:ttl:600000:isBinary:true:isEncrypted:true

Response:

The atServer should return the commit id from Commit Log if the update is successful.

data:<CommitId>

If the user provides the invalid update meta command, then it should respond with the following error and close the connection to the atServer.

error:AT0003-Invalid Syntax

Description:

The update:meta verb should be used to perform create/update operations on the atServer. The update:meta verb requires the owner of the atServer to authenticate himself/herself to the atServer using from and cram verbs.

The atServer should allow creation of keys with null values. If a key has been created for another atSign user, the atServer should honor “autoNotify” configuration parameter.

Options::

<ttl> Required: No. Description: Time to live in milliseconds

<ttb> Required: No. Description: Time to birth in milliseconds

<ttr> Required: No. Description: Time to refresh in milliseconds

-1 is a valid value which indicates that the user with whom the key has been shared can keep it forever and the value for this key won’t change forever

<ccd> Required: No. Description: A value of “true” indicates that the cached key needs to be deleted when the atSign user who has originally shared it, deletes it.

<for@sign> Required: Yes (Not required when the key is a public key). Description: atSign of the user with whom the key has been shared.

<@sign> Required: Yes. Description: atSign of the owner.

The delete verb #

Synopsis:

The delete verb should be used to delete a key from the key store. Only the authenticated owner of the atServer can delete keys that they created.

Example:

Delete a key (that you created) from your atServer.

delete:phone@<you>

Response:

The atServer returns the commit id of the operation. Note: no information about the key (if it was deleted or if it ever existed in the first place) is given.

data:1234

The stats verb #

Synopsis:

The stats verb should be used to get the statistics of an atSign.

Following is the regex of the stats verb

stats(?<statId>:((?!0)\d+)?(,(\d+))-)?

Response:

if the user gives stats all the statistics will be returned as JSON. Following statistics are provided:

1. activeInboundConnections
2. activeOutboundConnections
3. lastCommitId
4. secondaryStorageSize
5. topAtSigns
6. topKeys

Example:

data: [{"id":"1","name":"activeInboundConnections","value":"1"}, {"id":"2","name":"activeOutboundConnections","value":"0"}, {"id":"3","name":"lastCommitID","value":"1"}, {"id":"4","name":"secondaryStorageSize","value":12560}, {"id":"5","name":"topAtSigns","value":{"@bob":1}}, {"id":"6","name":"topKeys","value":{"publickey@alice":1}}]

Individual statistics can be retrieved using the respective Id.

@alice@stats:1
data: [{"id":"1","name":"activeInboundConnections","value":"1"}]

The sync verb #

The sync verb enables to synchronize the keys between the local atServer and remote atServer.

Following is the regex:

sync:(?<from_commit_seq>[0-9]+$|-1)

Response:

The sync verb returns a json array of the commit entries from the given commit id to the current commit id. Further, the sync verb accepts -1 as argument which returns all the commit entries.

data:[{"atKey":"@bob:phone@alice","operation":"+","opTime":"2020-10-26 11:57:43.732","commitId":0,"value":"12345","metadata":{"ttr":"36000000","ccd":"false"}},
{"atKey":"@bob:shared_key@alice","operation":"-","opTime":"2020-10-26 09:44:54.382219Z","commitId":1}]

The notify verb #

Synopsis:

The notify verb enables us to notify the atSign user of some data event.

The following is the regex for the notify verb

notify:((?<operation>update|delete):)?(messageType:(?<messageType>key|text):)?(priority:(?<priority>low|medium|high):)?(strategy:(?<strategy>all|latest):)?(latestN:(?<latestN>\d+):)?(notifier:(?<notifier>[^\s:]+):)?(ttln:(?<ttln>\d+):)?(ttl:(?<ttl>\d+):)?(ttb:(?<ttb>\d+):)?(ttr:(?<ttr>(-)?\d+):)?(ccd:(?<ccd>true|false):)?(@(?<forAtSign>[^@:\s]*)):(?<atKey>[^:@]((?!:{2})[^@])+)(@(?<atSign>[^@:\s]+))?(:(?<value>.+))?$

Example:

Notify @alice that you have a shared key @alice:test@<you> with an updated value waiting for them to lookup.

notify:update:@alice:test@<you>

Notify @alice that you have a shared key @alice:test@<you> that was deleted.

notify:delete:@alice:test@<you>

Notify @alice with a message my sample message to bob.

notify:messageType:text:@<you>:my sample message to bob

Response:

When a key is notified successfully, returns

data:<notificationId>

where the notificationId is the id of the sent notification.

Description:

When an atSign user notifies the key to another atSign user, an entry has to be created in received notifications list on the user who has shared the key and an entry has to be created in sent notifications list on the user to whom the key is to be notified. When auto notify is set to true, when a key is created/updated and deleted notification is triggered to another atSign user.

Notify List #

Synopsis:

Notify list returns a list of notifications.

The following is the regex

notify:(list (?<regex>.-)|list$)

Example:

List all notifications that you have received.

notify:list

Response:

If the user is the owner, returns a list of received notifications. If a user is pol authenticated user, returns a list of sent notifications

data:[{"id":"0e5e9e89-c9cb-423b-8972-8c5487215990","from":"@alice","to":"@bob","key":"@bob:phone@alice","value":12345,"operation":"update","epochMillis":1603714122636}]

Notify Remove #

Synopsis:

Notify remove removes a notification from the notification log.

The following is the regex

notify:(remove:(?<notificationId>[^:]+$))

Example:

Remove a notification that you received that has id 0e5e9e89-c9cb-423b-8972-8c5487215990.

notify:remove:0e5e9e89-c9cb-423b-8972-8c5487215990

Response:

If successful, returns

data:success

Notify Status #

Synopsis:

Notify status returns the status of a notification that was sent to another atSign user.

The following is the regex

notify:(status:(?<notificationId>[^:]+$))

Example::

Check the status of the notification that you sent with id 0e5e9e89-c9cb-423b-8972-8c5487215990.

notify:status:0e5e9e89-c9cb-423b-8972-8c5487215990

Response:

Returns the status of the notification

data:delivered

data:undelivered

The monitor verb #

Synopsis:

The monitor verb streams received notifications.

The following is the regex

^monitor$|^monitor ?(?<regex>.-)?)$

Example:

Start monitoring all notifications in this current session.

monitor

Response:

Returns a stream of notifications

@alice@monitor
notification: {"id":"773e226d-dac2-4269-b1ee-64d7ce93a42f","from":"@bob","to":"@alice","key":"@alice:phone@bob","value":null,"operation":"update","epochMillis":1603714720965}

Description:

The monitor verb accepts an optional parameter to filter the notifications by passing filter criteria as regex to monitor verb.

Error Codes #

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Last updated on 2023-03-07 19:16:36 -0500 -0500

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