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How-To Guide: Running an Ecash Mint

September 26, 2023
in Bitcoin
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This text is featured in Bitcoin Journal’s “The Withdrawal Situation”. Click on right here to subscribe now.

A PDF pamphlet of this text is obtainable for obtain.

Chaumian ecash, a privacy-preserving cost system, was conceptualized within the early ’80s and recognized to be the primary cryptocurrency ever invented. Though this expertise skilled a interval of dormancy, the arrival of Bitcoin has revived curiosity on this expertise. As we stride into an period more and more involved with digital privateness, ecash is experiencing a renaissance, primarily attributable to our discovery of Bitcoin because the foundational cash layer for the web.

Cashu permits the usage of ecash on Bitcoin, empowering abnormal customers to function a mint that’s linked to the Lightning Community. This allows everybody to supply completely personal, untraceable Bitcoin cost companies to their friends, social circles, or bigger communities.

Chaumian mints use a way often called blind signatures, which obscure consumer actions from the custodian managing the service. Customers, upon making a cost over the Lightning Community, obtain ecash that’s saved as information items on their units, similar to bodily money. These ecash tokens, denominated in satoshis, might be exchanged between customers or be transformed again right into a cost on the Lightning Community with the assistance of the mint.

An essential benefit of ecash is that transactions between customers can happen via any communication medium, reminiscent of a chat consumer or a QR code, with the mint not concerned within the precise token trade. This ensures the mint is oblivious to transaction specifics, together with who transacted with whom. Even throughout fund withdrawal from the mint, consumer id stays nameless.

The mixing of Cashu guarantees a realm of near-perfect privateness on the earth of Bitcoin custody. This tutorial explains how one can arrange and run a Cashu mint as we speak and grow to be a blinded Uncle Jim your self.

Cashu on LNbits

The simplest approach to run a Cashu mint is thru the LNbits Cashu extension. For that, you already want a Lightning node with LNbits put in. In case you are utilizing fashionable node distributions like Umbrel, search for the LNbits app and set up it. As soon as LNbits is about up, it takes solely a few clicks: Go to the extension overview and search for the Cashu extension and set up and allow it. You must now see the extension obtainable for all customers of your LNbits occasion.

As a consumer, click on on the extension and create a brand new Cashu mint. Enter the main points in your mint and choose the backend pockets that will probably be used for funding the mint. That’s it! You possibly can copy the mint URL and use it with any Cashu pockets, reminiscent of Nutstash.app or Cashu.me.

Beware, you’re accountable for maintaining your mint operational and the deposited funds on this pockets secure. You additionally must handle your node properly such that your customers can simply make and obtain funds on the Lightning Community. Moreover, you additionally don’t have any method of realizing the exercise of your customers. This implies you’re unable to censor anybody particularly from utilizing your mint. Chaumian mints are so privacy-preserving that censorship is virtually unattainable.

Cashu Nutshell

Probably the most superior method of operating a Cashu mint as we speak is to make use of the reference implementation known as Nutshell. For this, you first should clone the GitHub repository and comply with the directions of establishing your Python setting within the Readme.

As soon as your setting is prepared, it’s a must to arrange your mint configuration which incorporates connecting it to a Lightning backend. Presently, you need to use any LNbits occasion as a Lightning backend (which in flip lets you use all fashionable Lightning node implementations). Within the close to future, additionally, you will be capable to use your Lightning node straight with out an LNbits middleware. Nonetheless, for now, that is the beneficial method since LNbits lets you separate entry to your node’s funds to devoted wallets and thus serves as an additional layer of safety in case one thing goes incorrect.

To arrange your mint’s preferences, copy the instance configuration file .env.instance to .env and edit the next entries within the file:

# Community settings

MINT_LISTEN_HOST=127.0.0.1 # Use 0.0.0.0 for public entry

MINT_LISTEN_PORT=3338

# Lightning funding supply

MINT_LIGHTNING_BACKEND=LNbitsWallet

MINT_LNBITS_ENDPOINT=https://legend.lnbits.com

MINT_LNBITS_KEY=YourLNbitsAPIKey

Observe that when you simply wish to experiment (or develop) and never join your mint to the Lightning Community, you need to use the backend kind “MINT_LIGHTNING_BACKEND=FakeWallet” which is able to deal with all invoices as robotically paid. It’s nice for attempting issues out!

Lastly, we set some contact particulars in order that our customers can attain us in case one thing goes incorrect, and we additionally set some security limits such that solely small invoices might be created on our mint.

MINT_INFO_NAME=”Bitcoin Journal’s Cashu mint”

MINT_INFO_DESCRIPTION=”Disguise your nuts with Bitcoin Journal”

MINT_INFO_DESCRIPTION_LONG=”This mint is used for a particular occasion hosted by Bitcoin Journal. Please withdraw your funds on the finish of the occasion.”

MINT_INFO_CONTACT=[[“email”,”contact@me.com”], [“twitter”,”@me”], [“nostr”, “npub…”]]

MINT_MAX_PEG_IN=10000 # 10k sats most per bill

Keep in mind which you can’t determine particular person customers. Meaning, if you wish to shut your mint once more, it’s a must to give each consumer the chance to withdraw by themselves. Add the setting “MINT_PEG_OUT_ONLY=TRUE” to your configuration file in order that solely peg-outs are allowed if you wish to shut down your mint.

This text is featured in Bitcoin Journal’s “The Withdrawal Situation”. Click on right here to subscribe now.

A PDF pamphlet of this text is obtainable for obtain.



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Tags: EcashGuideHowToMintRunning
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