Use external example code

Signed-off-by: Matthias Geihs <matthias@perun.network>

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "source/perun-examples"]
+	path = source/perun-examples
+	url = https://github.com/perun-network/perun-examples

source/conf.py

@@ -67,7 +67,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = []
+exclude_patterns = ["perun-examples/*"]
 
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'

source/go-perun/tutorial/channels/closing.rst

@@ -57,14 +57,14 @@ Ethereum transaction fees still apply.
 Keep in mind that we already *finalized* the channel in the update that we sent.
 We therefore just need to *register* and *settle* which looks like this:
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 130-147
 
 The other participant would then have its `AdjudicatorEvent` handler called with a
 `ConcludedEvent`_ and should then also execute `closeChannel`.
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 149-155
 

source/go-perun/tutorial/channels/opening.rst

@@ -7,7 +7,7 @@ The channel is open after all participants accept the proposal and finish the on
 
 It looks like this:
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 38-68
 
@@ -24,7 +24,7 @@ HandleProposal
 
 An example Proposal handler looks like this:
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 70-89
 
@@ -39,7 +39,7 @@ NewChannel
 *go-perun* expects this handler to finish quickly. Use *go* routines if you want to do
 time-intensive tasks. You should also start the :ref:`watcher <the-watcher>` as shown below:
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 91-100
 

source/go-perun/tutorial/channels/updating.rst

@@ -6,7 +6,7 @@ Updating
 We now give the `node` an `updateChannel` function to update the channel by sending Ether from
 *Bob* to *Alice*.
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 102-115
    :emphasize-lines: 8,9
@@ -26,7 +26,7 @@ The update that was initiated with the `updateChannel` function above would then
 at the `HandleUpdate` function of the other participant. In `HandleUpdate` you can decide on whether you want to accept the incoming update or not.
 This example function accepts all updates:
 
-.. literalinclude:: ../go-perun-test/node.go
+.. literalinclude:: ../../../perun-examples/simple-client/node.go
    :language: go
    :lines: 117-124
 

source/go-perun/tutorial/getting-started.rst

@@ -13,8 +13,8 @@ To make it easier to follow the tutorial, you may already clone the source code
 .. code-block:: bash
    
    cd $GOPATH/src
-   git clone https://github.com/perun-network/perun-tutorial.git
-   cd perun-tutorial/go-perun-test
+   git clone https://github.com/perun-network/perun-examples.git
+   cd perun-examples/simple-client
    # Initialize Golang
    go mod tidy