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Austin Roberts 2021-10-04 13:51:19 -05:00
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2
docs/anatomy.rst
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@ -4,4 +4,4 @@
Plugin Anatomy
==============
.. todo:: fill in disections of archetypal plugins
.. todo:: fill in disections of archetypal plugins (Philip: Are you doing this, or am I?)

425
docs/api.rst
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@ -4,6 +4,9 @@
API
===
PluGeth Hooks
+++++++++++++
Plugins for Plugeth use Golang's `Native Plugin System`_. Plugin modules must export variables using specific names and types. These will be processed by the plugin loader, and invoked at certain points during Geth's operations.
Flags
@ -25,9 +28,9 @@ Initialize
* **Name:** Initialize
* **Type:** func(*cli.Context, core.PluginLoader, core.logs )
* **Behavior:** Called as soon as the plugin is loaded, with the cli context and a reference to the plugin loader. This is your plugin's opportunity to initialize required variables as needed. Note that using the context object you can check arguments, and optionally can manipulate arguments if needed for your plugin.
* **Behavior:** Called as soon as the plugin is loaded, with the cli context and a reference to the plugin loader. This is your plugin's opportunity to initialize required variables as needed. Note that using the context object you can check arguments, and optionally can manipulate arguments if needed for your plugin.
.. todo:: explain that plugin could provide node.Node with
.. todo:: explain that plugin could provide node.Node with
restricted.backend
InitializeNode
@ -59,78 +62,90 @@ Tracers
.. warning:: Modifying the values passed into tracer functions can
alter the
alter the
results of the EVM execution in unpredictable ways. Additopackage main
import (
"github.com/openrelayxyz/plugeth-utils/core"
"gopkg.in/urfave/cli.v1"
)
var (
log core.Logger
)
.. code-block:: go
type myservice struct{}
import (
"github.com/openrelayxyz/plugeth-utils/core"
"gopkg.in/urfave/cli.v1"
)
func (*myservice) Hello() string {
return "Hello world"
}
var (
log core.Logger
)
func Initialize(ctx *cli.Context, loader core.PluginLoader, logger core.Logger) {
log = logger
log.Info("Initialized hello")
}
type myservice struct{}
func GetAPIs(node core.Node, backend core.Backend) []core.API {
defer log.Info("APIs Initialized")
return []core.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &myservice{},
Public: true,
},
}
}
package main
func (*myservice) Hello() string {
return "Hello world"
}
import (
"github.com/openrelayxyz/plugeth-utils/core"
"gopkg.in/urfave/cli.v1"
)
func Initialize(ctx *cli.Context, loader core.PluginLoader, logger core.Logger) {
log = logger
log.Info("Initialized hello")
}
var (
log core.Logger
)
func GetAPIs(node core.Node, backend core.Backend) []core.API {
defer log.Info("APIs Initialized")
return []core.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &myservice{},
Public: true,
},
}
}
type myservice struct{}
func (*myservice) Hello() string {
return "Hello world"
}
.. todo:: Why do we have two copies of this? Also, these are GetAPIs examples, not tracers
func Initialize(ctx *cli.Context, loader core.PluginLoader, logger core.Logger) {
log = logger
log.Info("Initialized hello")
}
.. code-block:: go
func GetAPIs(node core.Node, backend core.Backend) []core.API {
defer log.Info("APIs Initialized")
return []core.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &myservice{},
Public: true,
},
}
}
nally, some objects may be reused acress calls, so data you wish to capture should be copied rather than retianed by reference.
package main
import (
"github.com/openrelayxyz/plugeth-utils/core"
"gopkg.in/urfave/cli.v1"
)
var (
log core.Logger
)
type myservice struct{}
func (*myservice) Hello() string {
return "Hello world"
}
func Initialize(ctx *cli.Context, loader core.PluginLoader, logger core.Logger) {
log = logger
log.Info("Initialized hello")
}
func GetAPIs(node core.Node, backend core.Backend) []core.API {
defer log.Info("APIs Initialized")
return []core.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &myservice{},
Public: true,
},
}
}
Internally, some objects may be reused across calls, so data you wish to capture should be copied rather than retained by reference.
LiveTracer
----------
.. todo:: Let's leave this out until we can have a more detailed implementation.
* **Name:** LiveTracers
* **Type:** core.Tracer
* **Behavior:** This tracer is used for tracing transactions as they are processed within blocks. Note that if a block does not validate, some transactions may be processed that don't end up in blocks, so be sure to check transactions against finalized blocks.
@ -148,16 +163,16 @@ The GetAPIs function itself will generally be fairly brief, and will looks somet
.. code-block:: go
``func GetAPIs(stack *node.Node, backend core.Backend) []core.API {
return []rpc.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &MyService{backend},
Public: true,
},
}
}``
func GetAPIs(stack *node.Node, backend core.Backend) []core.API {
return []rpc.API{
{
Namespace: "mynamespace",
Version: "1.0",
Service: &MyService{backend},
Public: true,
},
}
}
The bulk of the implementation will be in the ``MyService`` struct. MyService should be a struct with public functions. These functions can have two different types of signatures:
@ -169,18 +184,280 @@ A very simple MyService might look like:
.. code-block:: go
``type MyService struct{}
type MyService struct{}
func (h MyService) HelloWorld(ctx context.Context) string {
return "Hello World"
}``
func (h MyService) HelloWorld(ctx context.Context) string {
return "Hello World"
}
And the client could access this with an rpc call to
``mynamespace_helloworld``
And the client could access this with an rpc call to
``mynamespace_helloWorld``
Injected APIs
+++++++++++++
In addition to hooks that get invoked by Geth, several objects are injected that give you access to additional information.
Backend Object
--------------
The ``core.Backend`` object is injected by the ``InitializeNode()`` and ``GetAPI()`` functions. It offers the following functions:
Downloader
^^^^^^^^^^
``Downloader() Downloader``
Returns a Downloader objects, which can provide Syncing status
SuggestGasTipCap
^^^^^^^^^^^^^^^^
``SuggestGasTipCap(ctx context.Context) (*big.Int, error)``
Suggests a Gas tip for the current block.
ExtRPCEnabled
^^^^^^^^^^^^^
``ExtRPCEnabled() bool``
Returns whether RPC external RPC calls are enabled.
RPCGasCap
^^^^^^^^^
``RPCGasCap() uint64``
Returns the maximum Gas available to RPC Calls.
RPCTxFeeCap
^^^^^^^^^^^
``RPCTxFeeCap() float64``
Returns the maximum transaction fee for a transaction submitted via RPC.
UnprotectedAllowed
^^^^^^^^^^^^^^^^^^
``UnprotectedAllowed() bool``
Returns whether or not unprotected transactions can be transmitted through this
node via RPC.
SetHead
^^^^^^^
``SetHead(number uint64)``
Resets the head to the specified block number.
HeaderByNumber
^^^^^^^^^^^^^^
``HeaderByNumber(ctx context.Context, number int64) ([]byte, error)``
Returns an RLP encoded block header for the specified block number.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Header` object.
HeaderByHash
^^^^^^^^^^^^
``HeaderByHash(ctx context.Context, hash Hash) ([]byte, error)``
Returns an RLP encoded block header for the specified block hash.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Header` object.
CurrentHeader
^^^^^^^^^^^^^
``CurrentHeader() []byte``
Returns an RLP encoded block header for the current block.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Header` object.
CurrentBlock
^^^^^^^^^^^^
``CurrentBlock() []byte``
Returns an RLP encoded full block for the current block.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Block` object.
BlockByNumber
^^^^^^^^^^^^^
``BlockByNumber(ctx context.Context, number int64) ([]byte, error)``
Returns an RLP encoded full block for the specified block number.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Block` object.
BlockByHash
^^^^^^^^^^^
``BlockByHash(ctx context.Context, hash Hash) ([]byte, error)``
Returns an RLP encoded full block for the specified block hash.
The RLP encoded response can be decoded into a `plugeth-utils/restricted/types.Block` object.
GetReceipts
^^^^^^^^^^^
``GetReceipts(ctx context.Context, hash Hash) ([]byte, error)``
Returns an JSON encoded list of receipts for the specified block hash.
The JSON encoded response can be decoded into a `plugeth-utils/restricted/types.Receipts` object.
GetTd
^^^^^
``GetTd(ctx context.Context, hash Hash) *big.Int``
Returns the total difficulty for the specified block hash.
SubscribeChainEvent
^^^^^^^^^^^^^^^^^^^
``SubscribeChainEvent(ch chan<- ChainEvent) Subscription``
Subscribes the provided channel to new chain events.
SubscribeChainHeadEvent
^^^^^^^^^^^^^^^^^^^^^^^
``SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) Subscription``
Subscribes the provided channel to new chain head events.
SubscribeChainSideEvent
^^^^^^^^^^^^^^^^^^^^^^^
``SubscribeChainSideEvent(ch chan<- ChainSideEvent) Subscription``
Subscribes the provided channel to new chain side events.
SendTx
^^^^^^
``SendTx(ctx context.Context, signedTx []byte) error``
Sends an RLP encoded, signed transaction to the network.
GetTransaction
^^^^^^^^^^^^^^
``GetTransaction(ctx context.Context, txHash Hash) ([]byte, Hash, uint64, uint64, error)``
Returns an RLP encoded transaction at the specified hash, along with the hash and number of the included block, and the transaction's position within that block.
GetPoolTransactions
^^^^^^^^^^^^^^^^^^^
``GetPoolTransactions() ([][]byte, error)``
Returns a list of RLP encoded transactions found in the mempool
GetPoolTransaction
^^^^^^^^^^^^^^^^^^
``GetPoolTransaction(txHash Hash) []byte``
Returns the RLP encoded transaction from the mempool at the specified hash.
GetPoolNonce
^^^^^^^^^^^^
``GetPoolNonce(ctx context.Context, addr Address) (uint64, error)``
Returns the nonce of the last transaction for a given address, including
transactions found in the mempool.
Stats
^^^^^
``Stats() (pending int, queued int)``
Returns the number of pending and queued transactions in the mempool.
TxPoolContent
^^^^^^^^^^^^^
``TxPoolContent() (map[Address][][]byte, map[Address][][]byte)``
Returns a map of addresses to the list of RLP encoded transactions pending in
the mempool, and queued in the mempool.
SubscribeNewTxsEvent
^^^^^^^^^^^^^^^^^^^^
``SubscribeNewTxsEvent(chan<- NewTxsEvent) Subscription``
Subscribe to a feed of new transactions added to the mempool.
GetLogs
^^^^^^^
``GetLogs(ctx context.Context, blockHash Hash) ([][]byte, error)``
Returns a list of RLP encoded logs found in the specified block.
SubscribeLogsEvent
^^^^^^^^^^^^^^^^^^
``SubscribeLogsEvent(ch chan<- [][]byte) Subscription``
Subscribe to logs included in a confirmed block.
SubscribePendingLogsEvent
^^^^^^^^^^^^^^^^^^^^^^^^^
``SubscribePendingLogsEvent(ch chan<- [][]byte) Subscription``
Subscribe to logs from pending transactions.
SubscribeRemovedLogsEvent
^^^^^^^^^^^^^^^^^^^^^^^^^
``SubscribeRemovedLogsEvent(ch chan<- []byte) Subscription``
Subscribe to logs removed from the canonical chain in reorged blocks.
Node Object
-----------
The ``core.Node`` object is injected by the ``InitializeNode()`` and ``GetAPI()`` functions. It offers the following functions:
Server
^^^^^^
``Server() Server``
The Server object provides access to ``server.PeerCount()``, the number of peers connected to the node.
DataDir
^^^^^^^
``DataDir() string``
Returns the Ethereuem datadir.
InstanceDir
^^^^^^^^^^^
``InstanceDir() string``
Returns the instancedir used by the protocol stack.
IPCEndpoint
^^^^^^^^^^^
``IPCEndpoint() string``
The path of the IPC Endpoint for this node.
HTTPEndpoint
^^^^^^^^^^^^
``HTTPEndpoint() string``
The url of the HTTP Endpoint for this node.
WSEndpoint
^^^^^^^^^^
``WSEndpoint() string``
The url of the websockets Endpoint for this node.
ResolvePath
^^^^^^^^^^^
``ResolvePath(x string) string``
Resolves a path within the DataDir.
.. _*cli.Context: https://pkg.go.dev/github.com/urfave/cli#Context
.. _flag.FlagSet: https://pkg.go.dev/flag#FlagSet
.. _Native Plugin System: https://pkg.go.dev/plugin
.. _Native Plugin System: https://pkg.go.dev/plugin
Logger
------
The Logger object is injected by the ``Initialize()`` function. It implements
logging based on the interfaces of `Log15 <https://github.com/inconshreveable/log15>`_.

22
docs/build.rst
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@ -9,9 +9,9 @@ Build and Deploy
Setting up the environment
**************************
.. NOTE:: Plugeth is built on a fork of `Geth`_ and as such requires familiarity with `Go`_ and a funtional `environment`_ in which to build Go projects. Thankfully for everyone Go provides a compact and useful `tutorial`_ as well as a `space for practice`_.
.. NOTE:: Plugeth is built on a fork of `Geth`_ and as such requires familiarity with `Go`_ and a funtional `environment`_ in which to build Go projects. Thankfully for everyone Go provides a compact and useful `tutorial`_ as well as a `space for practice`_.
PluGeth is an application built in three seperate repositories.
PluGeth is an application built in three seperate repositories.
* `PluGeth`_
* `PluGethUtils`_
@ -23,13 +23,13 @@ Once all three are cloned into their own directories you are ready to begin. Fir
$ go get
This will download all dependencies needed for the project. This process will take a moment or two the first time through. Next run:
This will download all dependencies needed for the project. This process will take a moment or two the first time through. Next run:
.. code-block:: shell
$ go build
Once this is complete you should see a ``.ethereum`` folder in your home directory.
Once this is complete you should see a ``.ethereum`` folder in your home directory.
At this point you are ready to start downloading local ethereum nodes. In order to do so, from ``plugeth/cmd/geth`` run:
@ -37,7 +37,7 @@ At this point you are ready to start downloading local ethereum nodes. In order
$ ./geth
.. NOTE:: ``./geth`` is the primary command to build a *Mainnet* node. Building a mainnet node requires at least 8 GB RAM, 2 CPUs, and 350 GB of SSD disks. However, dozens of available flags will change the behavior of whichever network you choose to connect to. ``--help`` is your friend.
.. NOTE:: ``./geth`` is the primary command to build a *Mainnet* node. Building a mainnet node requires at least 8 GB RAM, 2 CPUs, and 350 GB of SSD disks. However, dozens of available flags will change the behavior of whichever network you choose to connect to. ``--help`` is your friend.
Build a plugin
@ -49,7 +49,7 @@ Navigate to ``plugethPlugins/packages/hello``. Inside you will see a ``main.go``
$ go build -buildmode=plugin
This will compile the plugin and produce a ``hello.so`` file. Move ``hello.so`` into ``~/.ethereum/plugins`` . In order to use this plugin geth will need to be started with a ``http.api=mymamespace`` flag. Additionally you will need to include a ``--http`` flag in order to access the standard json rpc methods.
This will compile the plugin and produce a ``hello.so`` file. Move ``hello.so`` into ``~/.ethereum/plugins`` . In order to use this plugin geth will need to be started with a ``http.api=mynamespace`` flag. Additionally you will need to include a ``--http`` flag in order to access the standard json rpc methods.
Once geth has started you should see that the first ``INFO`` log reads: ``initialized hello`` . A new json rpc method, called hello, has been been appended to the list of available json rpc methods. In order to access this method you will need to ``curl`` into the network with this command:
@ -61,15 +61,15 @@ You should see that the network has responded with:
.. code-block:: shell
``{"jsonrpc":"2.0","id":0,"result":"Hello world"}``
{"jsonrpc":"2.0","id":0,"result":"Hello world"}
Congradulations. You have just built and run your first Plugeth plugin.
Congradulations. You have just built and run your first Plugeth plugin.
.. _space for practice: https://tour.golang.org/welcome/1
.. _tutorial: https://tour.golang.org/welcome/1
.. _space for practice: https://tour.golang.org/welcome/1
.. _tutorial: https://tour.golang.org/welcome/1
.. _environment: https://golang.org/doc/code
.. _Go: https://golang.org/doc/
.. _Geth: https://geth.ethereum.org/
.. _PluGeth: https://github.com/openrelayxyz/plugeth
.. _PluGethUtils: https://github.com/openrelayxyz/plugeth-utils
.. _PluGethPlugins: https://github.com/openrelayxyz/plugeth-plugins
.. _PluGethPlugins: https://github.com/openrelayxyz/plugeth-plugins

6
docs/contact.rst
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@ -1,10 +1,10 @@
.. _contact:
.. _contact:
====================
Get in touch with us
====================
We want to hear from you! The best way to reach the PluGeth team is through our Discord server. Drop in, say hello, we are anxious to hear your ideas and help work through any problems you may be having.
We want to hear from you! The best way to reach the PluGeth team is through our Discord server. Drop in, say hello, we are anxious to hear your ideas and help work through any problems you may be having.
**todo: best way to link to our discord?**
`Join our Discord <https://discord.gg/J3tQMWCVPn>`_

11
docs/core_restricted.rst
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@ -1,8 +1,11 @@
.. _core_restricted:
============================================
Core vs Restricted packages in Plugeth-utils
============================================
=========================
PluGeth-utils Subpackages
=========================
PluGeth-utils is separated into two main packages: core, and restricted.
.. todo:: need explinations of core vs restircted functionality. what, why, how.
The `core` package has been implemented by the Rivet team, and is licensed under the MIT license, allowing it to be used in open source and closed source plugins alike. Nearly all plugins will need to import plugeth-utils/core in order to
The `restricted` package copies code from the go-ethereum project, which means it must be licensed under the LGPL license. If you import plugeth-utils/restricted, you must be sure that your plugin complies with requirements of linking to LGPL code, which will usually require making your source code available to anyone you distribute the plugin to.

57
docs/plugin_loader.rst
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@ -4,4 +4,59 @@
Plugin Loader
=============
.. todo:: breakdown of plugin loader function
The Plugin Loader is provided to each Plugin through the Initialize()``
function. It provides plugins with:
Lookup
======
``Lookup(name string, validate func(interface{}) bool) []interface{}``
Returns a list of values from plugins identified by ``name``, which match the
provided ``validate`` predicate. For example:
.. code-block:: go
pl.Lookup("Version", func(item interface{}) bool {
_, ok := item.(int)
return ok
})
Would return a list of ``int`` objects named ``Version`` in any loaded plugins.
This can enable Plugins to interact with each other, accessing values and
functions implemented in other plugins.
GetFeed
=======
``GetFeed() Feed``
Returns a new feed that the plugin can used for publish/subscribe models.
For example:
.. code-block:: go
feed := pl.GetFeed()
go func() {
ch := make(chan string)
sub := feed.Subscribe(ch)
for {
select {
case item := <-ch:
// Do something with item
case err := <sub.Err():
log.Error("An error has occurred", "err", err)
sub.Unsubscribe()
close(ch)
return
}
}
}()
feed.Send("hello")
feed.Send("world")
Note that you can send any type through a feed, but the subscribed channel and
sent objects must be of matching types.

44
docs/project.rst
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@ -22,7 +22,7 @@ PluGeth is an application built in three repositories:
`PluGeth`_
**********
The largest of the three Repositories, PluGeth is a fork of Geth which has been modified to enable a plugin architecture. The Plugin loader, wrappers, and hooks all reside in this repository.
The largest of the three Repositories, PluGeth is a fork of Geth which has been modified to enable a plugin architecture. The Plugin loader, wrappers, and hooks all reside in this repository.
`PluGeth-Utils`_
***************
@ -32,19 +32,55 @@ Utils are small packages used to develop PluGeth plugins without Geth dependenci
`PluGeth-Plugins`_
*****************
Plugins are packages which contain premade plugins as well as a location provided for storing new custom plugins.
Plugins are packages which contain premade plugins as well as a location provided for storing new custom plugins.
Dependency Scheme
-----------------
.. todo:: needs elaboration of dependency scheme
PluGeth is separated into three packages in order to minimize dependency conflicts. Golang plugins cannot include different versions of the same packages as the program loading the plugin. If plugins had to import packages from PluGeth itself, a plugin build could only be loaded by that same version of PluGeth. By separating out the PluGeth-utils package, both PluGeth and the plugins must rely on the same version of PluGeth-utils, but plugins can be compatible with any version of PluGeth compiled with the same version of PluGeth-utils.
PluGeth builds will follow the naming convention:
.. code-block:: shell
geth-$PLUGETH_UTILS_VERSION-$GETH_VERSION-$RELEASE
For example:
.. code-block:: shell
geth-0.1.0-1.10.8-0
Tells us that:
* PluGeth-utils version is 0.1.0
* Geth version is 1.10.8
* This is the first release with that combination of dependencies.
Plugin builds will follow the naming convention:
.. code-block:: shell
$PLUGIN_NAME-$PLUGETH_UTILS_VERSION-$PLUGIN_VERSION
For example:
.. code-block:: shell
blockupdates-0.1.0-1.0.2
Tells us that:
* The plugin is "blockupdates"
* The PluGeth-utils version is 0.1.0
* The plugin version is 1.0.2
When a Geth update comes out, you can expect a release of `geth-0.1.0-1.10.9-0`, which will be compatible with the same set of plugins.
When PluGeth upgrades are necessary, plugins will need to be recompiled. Whenever possible, we will try to avoid forcing plugins to be recompiled for an immediate Geth upgrade. For example, if we have geth-0.1.0-1.10.8, and upgrade PluGeth-utils, we will have a geth-0.1.1-1.10.8, followed by a geth-0.1.1-1.10.9. This will give users time to upgrade plugins from PluGeth-utils 0.1.0 to 0.1.1 while staying on Geth 1.10.8, and when it is time to upgrade to Geth 1.10.9 they can continue using the plugins they were using with geth 1.10.8. Depending on upgrades to Geth, it may not always be possible to maintain compatibility with existing PluGeth versions, which will be noted in release notes.
.. _obscures security updates as optimizations: https://blog.openrelay.xyz/vulnerability-lifecycle-framework-geth/
.. _PluGeth: https://github.com/openrelayxyz/plugeth
.. _PluGeth-Utils: https://github.com/openrelayxyz/plugeth-utils
.. _PluGeth-Plugins: https://github.com/openrelayxyz/plugeth-plugin
.. _PluGeth-Plugins: https://github.com/openrelayxyz/plugeth-plugin

17
docs/types.rst
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@ -7,28 +7,29 @@ Basic Types of Plugins
RPC Methods
-----------
In general these plugins provide new json rpc methods. They will requirre an initialize function that takes a context, loader, and logger as arguments. They will also need a GetAPIs function that takes a node and backend as arguments and returns an API.
In general these plugins provide new json rpc methods. They will requirre an initialize function that takes a context, loader, and logger as arguments. They will also need a GetAPIs function that takes a node and backend as arguments and returns an API.
.. NOTE:: In order to be made available a flag: ``http.api=<the name of your service>`` will need to be appended to the command line upon starting Geth.
.. NOTE:: In order to be made available a flag: ``http.api=<the name of your service>`` will need to be appended to the command line upon starting Geth.
Subcommand
------------
A subcommand redifines the total behavior of Geth and could stand on its own.
A subcommand redifines the total behavior of Geth and could stand on its own.
Tracers
-------
**Tracers vs LiveTracers.
Tracers are used to collect information from transaction execution, through Geth's ``debug_traceCall``, ``debug_traceTransaction``, and ``debug_traceBlock``. While standard Geth allows you to specify custom tracers in JavaScript, tracers written as plugins can be made much more performant.
While normal tracers run in the context of an RPC call, Live Tracers run on transactions in the course of Geth's block validation process. The methods for a tracer and live tracer are the same, but while tracers expose information through a RPC calls, live tracers simply provide an opportunity to aggregate information and have no inherent method for providing it to a consumer.
Tracers rely on historic data whereas LiveTracers run concurent with Geth's verification system. LiveTracers are more generic in that they cannot control the way in which they recieve information.
Subscriptions
-------------
A subscription must take a context.context as an argument and return a channel and an error. Subscriptions require a stable connection and return contant information. Subscriptions require a websocket connection and pass a json argument such as: ``{"jsonrpc":"2.0", "id": 0, "method": "namespace_subscribe", "params": ["subscriptionName", $args...]}``
A subscription must take a context.context as an argument and return a channel and an error. Subscriptions require a stable connection and return a stream of information. Subscriptions require a websocket connection and pass a json argument such as: ``{"jsonrpc":"2.0", "id": 0, "method": "namespace_subscribe", "params": ["subscriptionName", $args...]}``
.. NOTE:: Plugins are not limited to a singular functionality and can be customized to operate as hybrids of the above archtypes.
.. NOTE:: Plugins are not limited to a singular functionality and can be customized to operate as hybrids of the above archtypes.
**todo: this page needs a lot of work**
**todo: this page needs a lot of work**