kUSD Ledger application

kUSD wallet application framework for Ledger Blue and Nano S.

The application is essentially a fork of the Ethereum application with a different derivation path and currency name.

1. Building the application

There are two ways of doing this: with Docker and without Docker. Building with Docker is significantly easier because the Kowala ledger image includes all the build dependencies, but either way will work.

1.1 With Docker

Mount the application directory and run make in the docker container:

docker run -v `pwd`:/home/workspace kowalatech/ledger make

The binaries will be output to bin/.

1.2 Without Docker

1. Configure your development environment as outlined in the official documentation.
2. Run make.

2. Loading the application onto a Nano S (or Blue) device:

If you're using Linux, then you can use docker for this as well. For other operating systems, you'll have to load manually.

2.1 Using Docker (Linux only)

Before proceeding, making sure you have the following udev rules added to /etc/udev/rules.d:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0000", MODE="0660", TAG+="uaccess", TAG+="udev-acl" OWNER="<UNIX username>"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0001", MODE="0660", TAG+="uaccess", TAG+="udev-acl" OWNER="<UNIX username>"

You can then load the software onto the device by mounting your current directory and the USB bus:

docker run --privileged \
       -v /dev/bus/usb:/dev/bus/usb \
       -v `pwd`:/home/workspace \ 
       kowalatech/ledger make load

Note that the device must be connected via USB and in the 'home' state (PIN entered and no application open).

2.1 Manual loading

1. Configure the python loader as described in the documentation.
2. Run make load.

Note that the device must be connected via USB and in the 'home' state (PIN entered and no application open).

2. Use cases and testing

The kUSD application is designed run on a Ledger Nano S (and possibly Blue) as a hardware wallet for the following purposes:

1. To hold funds
2. To hold mining tokens (or mtokens; a Proof-of-Authority token)

In order to transfer mtokens, the Contract Data must be enabled in the settings.

The application can be tested on our Zygote testnet; please contact us for more details.

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Note: At the time of writing, the application has been tested on a Ledger Nano S, but not a Ledger Blue.