Disclaimer: The author is NOT a cryptographer and this work has not been reviewed. This means that there is very likely a fatal flaw somewhere. Cashu is still experimental and not production-ready.
Don't be reckless: This project is in early development; it does, however, work with real sats! Always use amounts you don't mind losing.
This project is in active development; it has not gone through optimization and refactoring yet.
Cashu protocol mint. Focused on Multiple denominations of ecash.
Please test in Mutinynet at: https://mutinynet.nutmix.cash
This is an attempt to learn Go and eCash. I saw the work made by calle on the Cashu protocol and was fascinated by the awesomeness of the project. So I decided to make an implementation of the mint in Go. I am attempting to make all the NUTs available as well as some other ideas such as: Monero and USD ecash.
Implemented NUTs:
Build the fastest and most secure implementation of an ecash mint possible. This would include and admin dashboard to be able to monitor and control de behaviour of the mint.
At this moment NUTS are up to P2PK (NUT-11) are implemented and working. I plan to keep going until all NUTS are done.
This project is thought to be able to be ran on a docker container or locally.
if you want to run the project in docker you will need two things.
You'll need the correct variables in an .env file. Use the env.example file as reference.
You need to make sure to use a strong POSTGRES_PASSWORD and make user the username and password are the same in the
DATABASE_URL
It's important to set up the variables under LIGHTNING CONNECTION for connecting to a node.
Please use a secure Private for deriving keysets.
if you want to run with docker traefik and you also need to fill variables below HOSTING for your domains.
If you have this correctly setup it should be as easy as running a simple docker command on linux:
If you missed and important variable for the mint. The mint should panic and let you know.
docker compose up -d
key rotation schema: /keydenomition/version/amount.
In case that you want to rotate the keys from a given keyset, you should set the given seed to active=false in your Database. Then restart the mint. The mint will automatically catch not having any active seed for a given unit and will rotate the key.
if you have a key: /sat/1/1 and rotate up it will turn out /sat/2/1
If you want to develop for the project I personally run a hybrid setup. I run the mint locally and the db on docker.
I have a special development docker compose called: docker-compose-dev.yml. This is for simpler development without having traefik in the middle.
.env file. docker compose -f docker-compose-dev.yml up db
# build the project go run cmd/nutmix/*.go
Pull requests and suggestions are always welcomed. The more people have eyes on this the better.
If you can donate monetarily it would be greatly appreciated. The funds would go to the development of the mint and servers for testing.
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