Mantis

Ethereum-like Blockchain Scala client built by IOHK's Team Grothendieck.

Status - Release

For continuous integration we're using:

• Buildkite to run all the Scala build steps
• Hydra to test that the Nix build steps work and run each of the Ops test suites.

You can check the latest build results of the current branch by clicking the status icon in the header of the Github file browser.

Unit Test Code Coverage Status - TBD

Docs - FIXME: Update docs!

For more details on configuration and functionality check out our wiki (also at wiki)

Download the client

The latest release can be downloaded from here

Command line version

You can use generic launcher with appropriate parameter to connect with pre-configured network, it can be found in bin directory.

Example:

• ./bin/mantis-launcher etc - for joining Ethereum Classic network

Possible networks: etc, eth, mordor, testnet-internal

Command Line Interface

cli is a tool that can be used to:

• generate a new private key

./bin/mantis cli generate-private-key

• derive an address from private key

./bin/mantis cli derive-address 00b11c32957057651d56cd83085ef3b259319057e0e887bd0fdaee657e6f75d0

• generate genesis allocs (using private keys and/or addresses)

`./bin/mantis cli generate-alloc --balance=42 --address=8b196738d90cf3d9fc299e0ec28e15ebdcbb0bdcb281d9d5084182c9c66d5d12 --key=00b11c32957057651d56cd83085ef3b259319057e0e887bd0fdaee657e6f75d1`

Building the client

SBT

Prerequisites to build

• JDK 1.8 (download from java.com)
• sbt (download sbt)
• python 2.7.15 (download from python.org)

Build the client

As an alternative to downloading the client build the client from source.

git submodule update --recursive --init
sbt dist

in the root of the project.

This updates all submodules and creates a distribution zip in ~/target/universal/.

Nix

In the root of the project:

Build the client

nix-build

Regenerate lock files

nix-shell
sbtix-gen-all2

OR

If the "ensure Nix expressions are up-to-date" step of your CI build has failed, check the artifacts of that step. There should be a patch provided, which you can apply locally with:

patch -p1 < downloaded.patch

This patch will update the lock files for you.

Why so many lock files?

• repo.nix : generated by the sbtix-gen command and includes only the build dependencies for the project.
• project/repo.nix : generated by the sbtix-gen-all command and includes only the plugin dependencies. Also generates repo.nix.
• project/project/repo.nix : generated by the sbtix-gen-all2 command and includes only the plugin dependencies. Also generates repo.nix and project/repo.nix.

error: unsupported argument 'submodules' to 'fetchGit'

You get this error when you aren't using a new-enough version of Nix (fetchGit support for submodules is recent).

To fix this, update the version of Nix you are using, or in a pinch:

• Remove the "submodules = true;" argument from fetchGit (in ./nix/pkgs/mantis/default.nix).
• git submodule update --recursive --init
• nix-build

Monitoring

Locally build & run monitoring client

# Build monitoring client docker image
projectRoot $ docker build -f ./docker/monitoring-client.Dockerfile -t mantis-monitoring-client ./docker/
# Run monitoring client in http://localhost:9090
projectRoot $ docker run --network=host mantis-monitoring-client

Feedback

Feedback gratefully received through the Ethereum Classic Forum (http://forum.ethereumclassic.org/)

Known Issues

There is a list of known issues in the 'RELEASE' file located in the root of the installation.