Woleet's identity and signature server for backends.
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Woleet backend kit

WARNING: Woleet backendkit is no longer supported and is replaced by Woleet.ID Server

The Woleet backend kit facilitates the integration of Woleet's signature anchoring functionality into your corporate workflow, by providing all your backend need to easily:

  • manage its identity and associated bitcoin address
  • sign data using its bitcoin address
  • expose its identity and prove the ownership of its bitcoin address

The Woleet backend kit is made of:

  • an initialization script allowing to generate or restore the bitcoin identity and the API token of the backend kit
  • a Node.js server exposing the REST API of the backend kit

The backend kit API exposes two public endpoints that need to be accessible from outside your backend:

  • /identity allows to verify that your backend effectively owns its claimed bitcoin address
  • /documentation allows to display the Swagger documentation of the backend kit API.

Additionally, the backend kit API exposes one private endpoint that need to be accessible only from inside your backend:

  • /signature allows to sign some data using its bitcoin address (an API token is used to protect this endpoint)


To install the Node.js server, you will need:

  • a web domain (eg. mycompany.com) used to expose the public endpoints of the backend kit API
  • a valid (not self signed) TLS certificate (and its associated key) associated to the web domain

Node.js needs to be installed on your system. To run the Node.js server into a Docker container, you also need to install Docker on your system.

Install the server

Clone the project (git clone https://github.com/woleet/woleet-backendkit.git) or download https://github.com/woleet/woleet-backendkit/archive/master.zip and uncompress it.

Initialize the server

Go to the installation directory.

Choose which version of the initialization script you want to use: 2 versions are provided, initialize-docker.sh and initialize-node.sh, depending on whether you want to run the Node.js server directly or embed it into a Docker container.

Run the initialization script with the following parameters:

  • cert=<PATH_TO_CERTIFICATE> path to your certificate.
  • key=<PATH_TO_CERTIFICATE_KEY> path to your certificate's key.
  • domain=<YOUR_DOMAIN> (to expose the API on "https://<YOUR_DOMAIN>/").
  • signaturePort=<SIGNATURE_PORT> (optional, default 443), set it if you want to expose the "/signature" endpoint on a specific port.
  • defaultPort=<IDENTITY_PORT> (optional, default: 443), set it if you want to expose the "/identity" and "/documentation" endpoints on a specific port.
  • --cluster (optional), set it to use node cluster mode to handle a higher load.

The initialization script will:

  • Ask you if you want to restore a private key (WIF) or generate a new one.
  • Ask you if you want to restore an API token or generate a new one.
  • Display your private key (WIF), your API token and your bitcoin address (public key).
  • Display the command line to use to run the Node.js server.

WARNING: The private key (WIF) is required to restore your bitcoin identity in case of system loss, and the API token is required to use the "/signature" endpoint. Be careful to write down and backup these 2 information carefully in order to restore your identity and service in case of server loss.


./initialize-docker.sh domain=localhost key=~/ssl/selfsigned.key cert=~/ssl/selfsigned.crt


./initialize-node.sh domain=localhost key=~/ssl/selfsigned.key cert=~/ssl/selfsigned.crt

Start the server

To run the server, simply run the command as displayed by the initialization script.


node main key=... cert=... domain=... defaultPort=... restoreWIF=... restoreToken=...


docker run -p 443:443 -v ...:/usr/src/app/volume/key -v ...:/usr/src/app/volume/cert --rm -d woleet-backend-kit key=/usr/src/app/volume/key cert=/usr/src/app/volume/cert domain=... restoreWIF=... restoreToken=...=

Endpoints API documentation

The detailed documentation of the backend kit API is described in the swagged.yaml file contained in this repository. This file can be imported at editor.swagger.io. The documentation is exposed on the /documentation endpoint.