Topic: [ANN][DASH] Dash (dash.org) | First Self-Funding Self-Governing Crypto Currency - page 1452. (Read 9723787 times)

Thanks for answering i guess everybody is so "exited/focus" on the pump,

where do i get the Electrum-DASH-2.4.1rc2.tar.gz on dash.org i only get the Electrum-DASH-2.4.1rc2.bin file, teheres no src folder after i clonend from github???

Through trial and error I found the following steps -- give it a try and let me know, it was a bit finicky for me as well :-)

sudo apt-get install python-dev python-pip libudev-dev libusb-1.0.0-dev
sudo pip install cython
sudo pip install hidapi
sudo apt-get install python-websocket
sudo python setup.py sdist
sudo pip install --pre dist/Electrum-DASH-2.4.1rc2.tar.gz
./electrum-dash

Edit: this is all done from within the /electrum-dash/src folder, after cloning from github

You are misinformed. Darksend doesn't work that way.
But, I understand why. The terminology is confusing.

Darksend (the transaction checkbox) just spends from your pre-mixed inputs. There is no other transaction involved.
I can choose any input for a refund and you get all your funds back.

Darksend Mixing (the ahead-of-time masternode input shuffling) is the only time another users inputs are involved in a merged transaction. You're always sending to yourself in this mode, never a third party.

I love when I go to watch a movie and my investment increases by $2,000. I wonder how Otoh feels right now? Seriously, though, fantastic job to you guys, and for keeping it a secret for so long. Miami is going to be fun!

Time to get technical....Let's go.

Of course, the fee for the darksend is rounded up.  So a .41 Dash beverage is actually .5 dash with the .09 Dash fee.  And the fee actually passes on to the receiver if I am not mistaken.  There would be 5 inputs of .1 in the transaction.  Likelihood of all of them originating with the sender wallet = slim.  So the refund would most likely be a partial refund.  Maybe hitting a 20%-40% return rate.

I love when I go to watch a movie and my investment increases by $2,000. I wonder how Otoh feels right now? Seriously, though, fantastic job to you guys, and for keeping it a secret for so long. Miami is going to be fun!

not so. we can refund darksends too.  the same input lookup works for all transaction types.
(we have inputs to send to, we just don't know their history.)

... can't refund...
#2 Change from the default nondarksend to darksend.

A lot happened here and it is pretty amazing it is so fast.  Moocowmoo did a great job on this.

I also think the vending machine idea is a great example of the power and versatility of instantly confirming crypto. It's a fantastic initiative. But I can see some banana skins that you might want to think about before rolling it out to a public demo.

First of all, this:


...I don't think that's acceptable because it isn't commercially consistent and basically amounts to theft. Think two 13 year old teenage kids with iPhones who buy a coke. One gets change and one doesn't cos they're not technologically nerdy enough to check their denominations ? They don't really want to be faced with questions like "Darksend" "Not Darksend". It might as well be two different currencies.

Further, if change is involved, it should be on condition of supply of a change address, not the on condition of coin denominations. That way the service can be commercially consistent and also optimally serve instances of homogeneous denominations as your current design does. (Because it supplies an implicit change address, but heterogeneous payments then need the option of supplying an explicit one).


I'd just ditch the whole idea of change since it isn't really compatible with cryptocurrency (other than change addresses in wallets where the wallet itself has full control over everything). Just accept exact amounts otherwise no coke - since it's far easier for a customer to type the right amount into their wallet than be worrying about how their payment was denominated. Doesn't the QR code do that for them anyway ?

Sorry to be so nerdy about this but it's a great idea and I don't want you to get shot down by a*ssholes (other than me   ) who home in on the glaring banana skins of the concept only to ignore the huge potential of it.

Also, what you're demonstrating isn't really a vending machine, it's a metaphor for an entire commercial business model so it's the commercial priorities that need to be thought through, not the blockchain technicalities. In that regard, details like that change thing can explode in your face when presented to the "wrong" audience.

The amount to pay appears on your phone and then you have a pin to type in.
But I know what you mean.

Anyone?

There nothing to stop a rogue vending machine from charging you $10,000 for a coke and the user not noticing. Maybe thats the bigger challenge than sending change.  

And here is what we have been working on for the Miami show.....



Yes, a Dash Instantx detecting, soda/pop machine.  

Why a vending machine?  
Because it shows off InstantX in a real use point of sale scenario.  This can't be done with any Bitclone(coins that confirm and secure transactions at the same time).

We have a machine(Thanks Camosoul), we are almost done with software(Thanks Moocowmoo), graphics are started(Thanks Raptor73), and will be adding android wallet instantx functionality(Thanks Fulltimegeek).  Camosoul, Moocowmoo, Fulltimegeek, Splawik21, Oaxaca, Raptor73, and Solarminer(The Instigator) are all helping on this.

What does it do?

• Displays a QR code to send Dash.
• If the amount is sent via Instantx and the amount is equal or above the amount needed, it sends the command to credit the machine for 1 beverage.  This is fast - Instant from a human's perspective.
• If the amount is less/over, it instantly returns the change.
• If a darksend transactions without exact amount is sent, it keeps the change.
• If a standard transaction is sent it rejects it and instantly sends it back.  (Maybe display "We don't wait for block confirmations and either should you, InstantX instead!")
• Once a purchase is made, it displays a thank you and rotates the QR code.

This is just a stepping block.  Next we plan to convert gas pumps, which is why returning change is important.  And many other uses, only possible because of InstantX.

But, considering the qr code has the price embedded, this was more experimental than practical.
The necessity of change from a vending machine is an artifact of fiat denominations that don't really apply anymore (tee hee).