IOTA

 
 
IOTA is an open-source distributed ledger. It uses a directed acyclic graph (DAG) instead of a blockchain.
IOTA's DAG is referred to as the tangle, and is a generalization of the block chain protocol.

More information about IOTA can be found at:
http://iota.org/







How to build and install the Java IOTA Reference Implementation (IRI) on macOS



Information
https://iota.readme.io/docs/install-iri
https://github.com/iotaledger/iri

Operating system used
macOS 10.12 Sierra

Software prerequisites
Java 8u66 or higher
Homebrew


Procedure
  1. MacOS Sierra comes with a "system Ruby 2.0.0p645" pre-installed.
    Do not use the system Ruby.

    First install Ruby Version Manager (RVM):
    Type: \curl -L https://get.rvm.io | bash -s stable

    Output:
    Installing RVM to /Users/robertlie/.rvm/
    Adding rvm PATH line to /Users/robertlie/.profile /Users/robertlie/.mkshrc /Users/robertlie/.bashrc /Users/robertlie/.zshrc.
    Adding rvm loading line to /Users/robertlie/.profile /Users/robertlie/.bash_profile /Users/robertlie/.zlogin.
    Installation of RVM in /Users/robertlie/.rvm/ is almost complete:
    * To start using RVM you need to run `source /Users/robertlie/.rvm/scripts/rvm`
    in all your open shell windows, in rare cases you need to reopen all shell windows.
    * WARNING: '~/.profile' file found. To load it into your shell, add the following line to '/Users/robertlie/.bash_profile':
    source ~/.profile

    Note:
    .bash_profile is modified.

  2. Install xcode-select:
    Type: xcode-select --install

    Note:
    If you do not install xcode-select you will get this error message when isntalling ruby (next step):
    dyld: lazy symbol binding failed: Symbol not found: _utimensat

  3. Install latest ruby version.
    Type: rvm install ruby-2.4.2

    Note:
    If you want to know the latest version, see:
    http://www.ruby-lang.org/en/downloads/

  4. Check ruby version.
    Type: ruby -v

    ruby 2.4.2

  5. Install maven.
    Type: brew install maven

  6. Install Java IOTA Reference Implementation (IRI) source code.
    Type: mkdir ~/tools
    Type: mkdir ~/tools/iota_mainnet
    Type: cd tools/iota_mainnet
    Type: git clone https://github.com/iotaledger/iri
    Type: cd iri

  7. Show current git branch.
    Type: git branch -a

    Output:
    * dev
    remotes/origin/HEAD -> origin/dev
    remotes/origin/dev
    :


  8. Show all tags.
    Type: git tag -l

    Output:
    :
    v1.3.2.2
    v1.4.0
    v1.4.0-testnet
    :


  9. Checkout a tagged version:
    Type: git checkout tags/v1.4.0

  10. Show current git branch.
    Type: git branch -a

    Output:
    * (HEAD detached at v1.4.0)
    dev
    :


  11. Build the Java code.
    Type: mvn clean compile && mvn package

  12. The compiled iri-xxx.jar file can be found at:
    ~/tools/iota_mainnet/iri/target