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Nexus How-To
############
.. contents:: Table of Contents
Obtain Nexus
============
Nexus belongs to the LibEuFin project, and can be downloaded via Git:
``$ git clone git://git.taler.net/libeufin``
Note that Kotlin+Gradle should already work on the host system.
Install Nexus
=============
Navigate into the `libeufin` local repository, and from top-level run:
``$ ./gradlew -Pprefix=$PREFIX nexus:installToPrefix``
In case of success, Nexus can be run with the following command:
``$ libeufin-nexus``
Connect Nexus with a EBICS account
==================================
Nexus is a Web service that unifies banking protocols, like EBICS, under
one JSON-based abstraction layer. Therefore, "using Nexus" means having
a running Nexus service that will receive the requests from another command
line program that is as well offered along LibEuFin.
Use the following command to *(1) run the nexus service*:
.. code-block:: shell
$ libeufin-nexus
At this point a *(2) superuser account needs to be activated
into the system*:
.. code-block:: shell
$ libeufin-nexus superuser foo # Will interactively ask for password
For simplicity, we'll enable the superuser to access the bank account
via the EBICS protocol, but a API to create less privileged users is
as well offered.
Nexus needs now to associate the user to a EBICS subscriber that was
activated on the bank. In the terminology, this is called *(3) creating
a EBICS connection*.
.. code-block:: shell
./libeufin-cli \
connections \
new-ebics-connection \
--connection-name $NEXUS_BANK_CONNECTION_NAME \
--ebics-url $EBICS_BASE_URL \
--host-id $EBICS_HOST_ID \
--partner-id $EBICS_PARTNER_ID \
--ebics-user-id $EBICS_USER_ID \
--nexus-user-id $NEXUS_USER \
--nexus-password $NEXUS_PASSWORD \
$NEXUS_URL
If the previous command succeeded, Nexus must communicate all the details
to the bank. Therefore, it will *(4) bootstrap the connection*.
.. code-block:: shell
./libeufin-cli \
connections \
bootstrap-connection \
--connection-name $NEXUS_BANK_CONNECTION_NAME \
--nexus-user-id $NEXUS_USER \
--nexus-password $NEXUS_PASSWORD \
$NEXUS_URL
Request history of transactions
===============================
Make a payment
==============
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