denaro

Setup with Docker

• Build the base image with make build
• $ docker-compose up -d

Setup without Docker

Optional:

Before installing denaro, you need to create the postgresql database.
You can find the schema in schema.sql.
You have to set environmental variables for database access:

• DENARO_DATABASE_USER, default to denaro.
• DENARO_DATABASE_PASSWORD, default to an empty string.
• DENARO_DATABASE_NAME, default to denaro.
• DENARO_DATABASE_HOST, default to 127.0.0.1.

Installation:

# create databsase
createdb denaro2 -U postgres
git clone https://github.com/denaro-coin/denaro
cd denaro
psql -d denaro2 -f schema.sql -U postgres
sudo apt-get install python3-dev libgmp3-dev
pip3 install -r requirements.txt
uvicorn denaro.node.main:app --port 3002

Mine a coin:

python denaro/wallet/wallet.py createwallet
python miner.py DX9n7N3t3yBqdixnYHK4td6CPPcH3D8zsVcF6FQtvdQ6b
python denaro/wallet/wallet.py send -to DYAYzytb555iszf7CryahqtSNwVNkyzSFaRSXYBXJzzsT -d 10
python denaro/wallet/wallet.py balance

See on explorer:

cd explorer
python3 -m http.server 

Now visit: http://localhost:8000/

clone the same repo again and replace denaro2 with denaro1 and port 3002 with 3001

Node should now sync the blockchain and start working

Deployment

https://stackoverflow.com/a/68184694/2351696

pip install gunicorn
gunicorn denaro.node.main:app -w 1 --timeout 150 -k uvicorn.workers.UvicornWorker -b 127.0.0.1:3002 --daemon

sudo a2enmod proxy_http
<VirtualHost *:80>
    ServerName denaro-node.stackschools.com
    ProxyPreserveHost On
    ProxyPass / http://localhost:3002/
    ProxyPassReverse / http://localhost:3002/
</VirtualHost>

Mining

denaro uses a PoW system.

Block hash algorithm is sha256.
The block sha256 hash must start with the last difficulty hex characters of the previously mined block.
difficulty can also have decimal digits, that will restrict the difficulty + 1th character of the derived sha to have a limited set of values.

from math import ceil

difficulty = 6.3
decimal = difficulty % 1

charset = '0123456789abcdef'
count = ceil(16 * (1 - decimal))
allowed_characters = charset[:count]

Address must be present in the string in order to ensure block property.

Blocks have a block reward that will half itself til it reaches 0.
There will be 150000 blocks with reward 100, and so on til 0.390625, which will last 458732 blocks.
The last block with a reward will be the 458733th, with a reward of 0.3125.
Subsequent blocks won't have a block reward.
Reward will be added the fees of the transactions included in the block.
A transaction may also have no fees at all.

Dump and Load database

$ sudo su postgres
$ pg_dump -d denaro2 > /tmp/file.sql

# load
$ createdb -U postgres denaro2
$ psql -U postgres -d denaro2 < file.sql