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SatoshiCore version of the famous/renowned DigitalNote blockchain
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README.md

README.md

DigitalNote [XDN] 2014-2018 (CryptoNote Base), 2018-2019 (Current) integration/staging tree

http://www.digitalnote.biz

What is the DigitalNote [XDN] Blockchain?

TODO: Update documentation regarding implemented tech as this section is out of date and much progress and upgrades have been made to mentioned sections...

Overview

DigitalNote is a blockchain project with the goal of offering secured messaging, Darksend, masternodes and an overall pleasing experience to the user.

Blockchain Technology

The DigitalNote [XDN] Blockchain is an experimental smart contract platform protocol that enables instant payments to anyone, anywhere in the world in a private, secure manner. DigitalNote [XDN] uses peer-to-peer blockchain technology developed by DigitalNote to operate with no central authority: managing transactions, execution of contracts, and issuing money are carried out collectively by the network. DigitalNote [XDN] is the name of open source software which enables the use of this protocol.

Custom Difficulty Retarget Algorithm “VRX”

VRX is designed from the ground up to integrate properly with the Velocity parameter enforcement system to ensure users no longer receive orphan blocks.

Velocity Block Constraint System

Ensuring Insane stays as secure and robust as possible the CryptoCoderz team have implemented what's known as the Velocity block constraint system. This system acts as third and final check for both mined and peer-accepted blocks ensuring that all parameters are strictly enforced.

Wish (bmw512) Proof-of-Work Algorithm

Wish or bmw512 hashing algorithm is utilized for the Proof-of-Work function and also replaces much of the underlying codebase hashing functions as well that normally are SHA256. By doing so this codebase is able to be both exponentially lighter and more secure in comparison to reference implementations.

Echo512 Proof-of-Stake Algorithm

DigitnalNote's proof of stake system utilizes Echo512 which is a super lightweight and secure hashing algorithm.

Specifications and General info

DigitalNote uses

libsecp256k1,
libgmp,
Boost1.68, OR Boost1.58,  
Openssl1.02o,
Berkeley DB 6.2.32,
QT5.11,
to compile

General Specs

Block Spacing: 5 Minutes
Stake Minimum Age: 15 Confirmations (PoS-v3) | 30 Minutes (PoS-v2)
Port: 18092
RPC Port: 18094

BUILD LINUX

Compiling DigitalNote "SatoshiCore" daemon on Ubunutu 18.04 LTS Bionic

Note: guide should be compatible with other Ubuntu versions from 14.04+

Become poweruser

sudo -i

CREATE SWAP FILE FOR DAEMON BUILD (if system has less than 2GB of RAM)

cd ~; sudo fallocate -l 3G /swapfile; ls -lh /swapfile; sudo chmod 600 /swapfile; ls -lh /swapfile; sudo mkswap /swapfile; sudo swapon /swapfile; sudo swapon --show; sudo cp /etc/fstab /etc/fstab.bak; echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab

Dependencies install

cd ~; sudo apt-get install -y ntp git build-essential libssl-dev libdb-dev libdb++-dev libboost-all-dev libqrencode-dev libcurl4-openssl-dev curl libzip-dev; apt-get update -y; apt-get install -y git make automake build-essential libboost-all-dev; apt-get install -y yasm binutils libcurl4-openssl-dev openssl libssl-dev; sudo apt-get install -y libgmp-dev; sudo apt-get install -y libtool;

Dependencies build and link

cd ~; wget http://download.oracle.com/berkeley-db/db-6.2.32.NC.tar.gz; tar zxf db-6.2.32.NC.tar.gz; cd db-6.2.32.NC/build_unix; ../dist/configure --enable-cxx; make; sudo make install; sudo ln -s /usr/local/BerkeleyDB.6.2/lib/libdb-6.2.so /usr/lib/libdb-6.2.so; sudo ln -s /usr/local/BerkeleyDB.6.2/lib/libdb_cxx-6.2.so /usr/lib/libdb_cxx-6.2.so; export BDB_INCLUDE_PATH="/usr/local/BerkeleyDB.6.2/include"; export BDB_LIB_PATH="/usr/local/BerkeleyDB.6.2/lib"

GitHub pull (Source Download)

cd ~; git clone https://github.com/DigitalNoteXDN/DigitalNote-1 DigitalNote

Build DigitalNote daemon

cd ~; cd ~/DigitalNote/src; chmod a+x obj; chmod a+x leveldb/build_detect_platform; chmod a+x secp256k1; chmod a+x leveldb; chmod a+x ~/DigitalNote/src; chmod a+x ~/DigitalNote; make -f makefile.unix USE_UPNP=-; cd ~; cp -r ~/DigitalNote/src/DigitalNoted /usr/local/bin/DigitalNoted;

Create config file for daemon

cd ~; sudo ufw allow 18092/tcp; sudo ufw allow 18094/tcp; sudo ufw allow 22/tcp; sudo mkdir ~/.XDN; cat << "CONFIG" >> ~/.XDN/DigitalNote.conf
listen=1
server=1
daemon=1
testnet=0
rpcuser=XDNrpcuser
rpcpassword=SomeCrazyVeryVerySecurePasswordHere
rpcport=18094
port=18092
rpcconnect=127.0.0.1
rpcallowip=127.0.0.1
CONFIG
chmod 700 ~/.XDN/DigitalNote.conf; chmod 700 ~/.XDN; ls -la ~/.XDN

Run DigitalNote daemon

cd ~; DigitalNoted; DigitalNoted getinfo

Troubleshooting

for basic troubleshooting run the following commands when compiling:

this is for minupnpc errors compiling

make clean -f makefile.unix USE_UPNP=-
make -f makefile.unix USE_UPNP=-

Updating daemon in bin directory

cd ~; cp -r ~/DigitalNote/src/DigitalNoted /usr/local/bin

License

DigitalNote [XDN] is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of DigitalNote [XDN].

The contribution workflow is described in CONTRIBUTING.md.

The developer mailing list should be used to discuss complicated or controversial changes before working on a patch set.

<< Developer Discord can be found at https://discord.gg/eSb7nEx.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check

There are also regression and integration tests of the RPC interface, written in Python, that are run automatically on the build server.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

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