How To Run Your Own Worker

HW requirements

While SGX is supported by most Intel CPU's that is not the case for all chipsets. Here we're just telling you what HW we are using and is known to work.

Dell PowerEdge R340 Server

CPU has to be Intel(R) Xeon(R) E-2276G CPU @ 3.80 GHz

Enable SGX support in BIOS

To enable SGX support in the Dell BIOS, enter the BIOS, go to System Security and set the following values:

  • Intel SGX to On
  • SGX Launch Control Policy to Unlocked

Intel SGX development and production (commercial) license

In order to perform a remote attestation of the enclave, an Intel SGX Attestation Enhanced Service Privacy ID (EPID) is needed. We use unlinkable quotes in our code. Developers need to register an account with Intel

Development Access

Copy your SPID and key to the following files (use Linux line endings):

  • bin/spid.txt: SPID of your subscription
  • bin/key.txt: Key of your subscription (primary or secondary works)

The enclave will be signed with the development key found under enclave/Enclave_private.pem and uses the configuration found under enclave/Enclave.config.xml.

Production Access

You need a commercial license with Intel to run your enclaves in production mode (the only mode that really is confidential). Only legal entities can get a commercial license with Intel. Get in touch with them to obtain one.

Copy your SPID and key to the following files (use Linux line endings):

  • bin/spid_production.txt: SPID of your subscription
  • bin/key_production.txt: Key of your subscription (primary or secondary works)

These files are used to access the Intel Remote Attestation Service.

The enclave will be signed with the private key that was also registered and whitelisted at Intel's (in the process of obtaining a commercial license). Make sure that the key is exported as an environment variable called SGX_COMMERCIAL_KEY.

The enclave in production mode uses the configuration found under enclave/Enclave.config.production.xml.

The only difference is that the option DisableDebug is set to 1.

SW Requirements

You need the following components installed to start developing/compiling the code:

Setup SGX hardware with Ansible

You find a sample Ansible playbook here

Open the playbook with your editor and replace all the variables with <...> with your own settings.

To execute the playbook and configure the remote machine, use the following command:

ansible-playbook site.yml -k

Using Docker

We provide docker images with all the required tools installed. They can be found on dockerhub.

The tag has the following format: <Ubuntu version>-<Intel SGX SDK version>-<Rust SGX SDK version>. We don't provide any latest so you must specify the tag.

If you execute

docker pull scssubstratee/substratee_dev:1804-2.12-1.1.3-001

you get a docker image with

  • Ubuntu 18.04
  • Intel SGX SDK 2.12
  • Rust SGX SDK 1.1.3 (which includes the correct Rust version)
  • container version 001
  • IPFS 0.4.21

The following builds the code inside the docker, but the compiled binaries are stored on your local working copy.

docker run -it -v $(pwd):/root/work scssubstratee/substratee_dev:1804-2.12-1.1.3-001 /bin/bash

Now you can build and run your worker inside docker.

Enabling SGX HW Support in Docker

If you are on a platform that supports SGX, you can enable HW support by:

  • Enable the SGX support in the BIOS

  • Instal the Intel SGX Driver and the Intel SGX SDK and make sure that /dev/isgx appears

  • Start the docker with SGX device support:

    docker run -it -v $(pwd):/root/work --device /dev/isgx scssubstratee/substratee_dev:1804-2.12-1.1.3-001 /bin/bash
  • Start the aesm service inside the docker:

    LD_LIBRARY_PATH=/opt/intel/sgx-aesm-service/aesm/ /opt/intel/sgx-aesm-service/aesm/aesm_service &
  • Compile the substraTEE-worker:

  • run worker like described below

If you run the Hardware Mode on a platform that does not support SGX, you get the following error from the substraTEE-worker

*** Start the enclave
[2019-05-15T05:15:03Z ERROR substratee_worker::enclave_wrappers] [-] Init Enclave Failed SGX_ERROR_NO_DEVICE!

Build Worker

In order to compile ring into wasm, you'll need LLVM-9 or above or you'll get linker errors. Here the instructions for Ubuntu 18.04. Skip this if you're building in our docker.

chmod +x
sudo ./ 10
export CC=/usr/bin/clang-10
export AR=/usr/bin/llvm-ar-10
# if you already built, make sure to run cargo clean
git clone
cd substraTEE-worker

this might take 10min+ on a fast machine.

then you'll have to provide your SPID and KEY (see above)

echo "<YOUR SPID>" > bin/spid.txt
echo "<YOUR KEY>" > bin/key.txt

Run Worker

cd bin
./substratee-worker init-shard
./substratee-worker shielding-key
./substratee-worker signing-key
./substratee-worker run --ns <yournodeip>