Zilliqa Nano S App

Zilliqa wallet application for Nano S.

Build

These instructions have been tried on Ubuntu 18.04. Other Linux based platforms may work too.

Ledger Setup

• Setup your Ledger Nano S as described in the official guide
• Update the firmware on your device following the instructions here This app has been tested with firmware version 1.5.5.
• If you are on Linux, make sure to set the udev rules for ledger. Help for it is provided here.
• You should now be able to use the Ledger Live app and manage your device using it.

Build Environment

For the sake of this setup, let us have a directory $LEDGER_DIR that contains the entire setup. Set this variable to an actual directory you prefer as export LEDGER_DIR=/home/user/ledger.

Install platform packages

• $sudo apt-get install libudev-dev libusb-1.0-0-dev python3-dev python3-venv gcc-multilib g++-multilib clang

Setup a virtual python environment for the ledger libraries. For commands shown below, the presence of (ledgerenv) ... indicates that the command is being run in the virtual environment.

• $python3 -m venv ${LEDGER_DIR}/ledgerenv
• $source ${LEDGER_DIR}/ledgerenv/bin/activate
• (ledgerenv) ... $pip install ledgerblue
• (ledgerenv) ... $SECP_BUNDLED_EXPERIMENTAL=1 pip --no-cache-dir install --no-binary secp256k1 secp256k1

Get Ledger toolchain related pre-requisites

• $cd $LEDGER_DIR; git clone https://github.com/LedgerHQ/nanos-secure-sdk

• $wget https://launchpad.net/gcc-arm-embedded/5.0/5-2016-q1-update/+download/gcc-arm-none-eabi-5_3-2016q1-20160330-linux.tar.bz2

• $mkdir devenv; tar -xvjf gcc-arm-none-eabi-5_3-2016q1-20160330-linux.tar.bz2 --directory devenv

Setup environment for building the app

• $export BOLOS_SDK=${LEDGER_DIR}/nanos-secure-sdk/
• $export GCCPATH=${LEDGER_DIR}/devenv/gcc-arm-none-eabi-5_3-2016q1/bin/

Fetch and build the Zilliqa Ledger Nano-S app app.hex in $ZIL_LEDGER_NANO_S/bin

• $cd $LEDGER_DIR; git clone https://github.com/CryptoAeon/zil-ledger-nano-s.git
• (ledgerenv) ...$make clean; make

An extra argument DBG=1 can be provided to make to enable debug builds. This will enable printing of debugging messages through PRINTF when the debug firmware is installed.

To ease setting up the environment for everyday development, we suggest having the following script env.sh. Edit it as necessary.

export LEDGER_DIR=/home/user/ledger # edit this as necessary.
export GCCPATH=${LEDGER_DIR}/devenv/gcc-arm-none-eabi-5_3-2016q1/bin/
export BOLOS_SDK=${LEDGER_DIR}/nanos-secure-sdk/
source ${LEDGER_DIR}/ledgerenv/bin/activate # activate python3 virtualenv

On each of your development shell, just run the following command to setup the environment

• $source env.sh

References

• https://github.com/LedgerHQ/blue-loader-python
• https://ledger.readthedocs.io/en/latest/userspace/getting_started.html

JavaScript Interface

Located here

Node CLI App

Located here

Python Test Utils

For each of the commands below, make sure that the virtual python environment is setup, by running the below command in your shell apriori.

• source ${LEDGER_DIR}/ledgerenv/bin/activate

Get public key for index 0

• (ledgerenv)...$python getPublicKey.py --index 0

Get address for index 0

• (ledgerenv)...$python getPublicKey.py --index 0 --dispAddr

Sign a hash from index 0

• (ledgerenv)...$python signHash.py --mhash 02E681C8EB3602CDB9261F407E2C2EE6CB9BA996AAA895677E133C02BEFC1F8482 --index 0

Delete the Zilliqa app

• (ledgerenv)...$python -m ledgerblue.deleteApp --targetId 0x31100004 --appName Zilliqa

Install app.hex to the device

• (ledgerenv)...$python -m ledgerblue.loadApp --path "44'/313'" --curve "secp256k1" --tlv --targetId "0x31100004" --delete --fileName "app.hex" --appName "Zilliqa" --appVersion "0.3.3" --appFlags "0x40"