DOS Client and Core Libraries

Prerequisites:

Cloud Server / VPS Recommendations

AWS Lightsail - Linux virtual server (1 cpu, 1GB memory, 40GB ssd, 2TB bandwidth)
Google Cloud Platform - Compute Engine General purpose (N2)
Vultr - Cloud Compute (1 cpu, 1GB memory, 25GB ssd, 1TB bandwidth)
Digital Ocean - Droplet (1 cpu, 25GB ssd, 1TB bandwidth)
Linode - Shared virtual Instances (1 cpu, 1GB memory, 25GB ssd, 1TB bandwidth)
[Others]

Verified and recommended installation environment

Ubuntu 18.04 x64 LTS or higher
An IPv4 address
- Run $ dig +short myip.opendns.com @resolver1.opendns.com
- Or get it from cloud server providers. Most vps / cloud server
With below ports open:
- udp port 7946
- tcp port 7946,9501
It's recommended to generate ssh login key pairs and setup public key authentication instead of using password login for server security and funds safety:
- Learn how to setup SSH public key authentication on Ubuntu 18.04 and disable password logins.

Bonding enough DOS tokens to run a node

Acquire at least 800,000 DOS tokens, (and optional - acquire several DropBurn token to reduce (up to 30%) the amount of DOS tokens needed to start a node, distribution plan be out later).
Replace your node ip address in config.json
Node runners currently earn three types of incomes: (Self-bonded) staking rewards, (other delegators') staking reward shares, oracle request processing fees.

Register and setup Infura api key

Register and get Infura api key
Replace your infura api key in config.json

Run with docker image

https://medium.com/dos-network/instructions-of-launching-a-node-in-dos-network-932e73a91a75

Building binary from source

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.