• Run $ dig +short myip.opendns.com @resolver1.opendns.com
• Or get it from cloud server providers. Most vps / cloud server

• udp port 7946
• tcp port 7946,9501

• Learn how to setup SSH public key authentication on Ubuntu 18.04 and disable password logins.

Install go1.11 or higher and setup golang workingspace like below:

$ sudo apt-get install golang 
$ sudo apt-get install build-essential

Open ~/.bashrc and set $GOPATH and $PATH environmental variables:

$ vim ~/.bashrc
  export GOPATH=$HOME/go
  export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin
$ source ~/.bashrc

Download source code:

$ mkdir -p $GOPATH/src/github.com/DOSNetwork
$ cd $GOPATH/src/github.com/DOSNetwork && git clone https://github.com/DOSNetwork/core.git
$ cd core
$ git checkout v1.0.4-m

Build:

• $ GO111MODULE=on go mod download - to download building dependencies
• Dev dependencies: solc-v0.5.17, abigen-v1.9.18-stable
• $ make - to build release version client

Run:

$ ./dos.sh start

Dev tips:

• $ go fmt ./... to reformat go source code.
• $ golint to fix style mistakes conflicting with effective go. (golint tool for vim users.)
• $ make devClient to build develoment version client.
• $ make updateSubmodule to fetch latest system contracts from repo, instead of making contract modifications locally.
• $ make gen to generate binding files for system contracts.
• $ make clean to remove built binaries or unnecessary generated files.
• Use solc-select tool to select / pin to specific solidity compiler version.