An idea I had while washing clothes.

[ivroer]

I'm still surprised that people are still singing and dancing about the risk of 0 confirmation transactions, or having to wait 10 minutes to buy a coffee, burger, laundromat token, etc.

There's plenty of topics on here and other websites that explain why no one would bother trying to double-spend attack such a small purchase, because it would take significant cost and effort to pull it off successfully.

There's only 2 things you need to do to stop the average person trying to double spend:

• Be connected to the internet, listening to other bitcoin transactions
• Check the transaction fee meets the protocol requirements

If you do those, then you're very safe. The cost for the "attacker" to double spend would far out weigh the reward of the the goods/services that they're attempting to steal from you.

Accepting 0 confirmation transactions is safer than credit card, and safer than coin operated machines that can be tampered with or raided in the absence of supervision.

you can hook all washing machine to basically a single mobile connection, but preferably you're gonna want a hard line.

this! if you fronted up the cost of a hard line you could have wifi running and attempt to charge people to use it while they're waiting for their washing... not sure if that would be successful these days where almost everyone has cheap mobile data.

[Bitcoin Oz]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

Don't get me wrong, I'm all for Bitcoin and that, but I fail to see how using Bitcoin in this situation is easier than coins? I'd prefer to just shove some coins in and off it goes. Using Bitcoin I'd got to arse about scanning codes etc... And if I can't get a signal on my phone I can't send them.

Bitcoin is great, but so is the convenience and ease of using cash.

Every time I go to get coins from the shops they look at me like I am a terrorist. It is not convenient at all to go hunting all over town for coins either.

[amincd]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

I have had the same thought when using a coin operated laundry. With a service of that low of a value at stake, and the ability to capture a double spender on camera, the coin laundry wouldn't need to worry about confirmations either, and could accept 0-conf Txs. I don't think a double spend is any more likely than someone using fake coins they minted.

[seafarer124]

There needs to be an app wallet where you transfer BTC already cleared and ready to spend.

A pre-approved wallet would not need any waiting time.

[Zooey]

There needs to be an app wallet where you transfer BTC already cleared and ready to spend.

A pre-approved wallet would not need any waiting time.

But this would require knowledge of future transactions that haven't happened yet.  Unless of course they have already happened, in which case, they were verified as having occurred at some point in the past, and you don't now need to do anything - you've already paid.  However, fundamentally, for a transaction to ever occur there must, at some point, exist a time before it has happened and time after it has been verified to have happened, otherwise it has yet to occur.

[Trance]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

it would be a big hub for hackers to hangout at!

[empoweoqwj]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

it would be a big hub for hackers to hangout at!

Love the idea of a bunch of hackers hanging out at laundrettes. Not sure if there are enough hackers in the world, spare ones anyway

[guybrushthreepwood]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

Don't get me wrong, I'm all for Bitcoin and that, but I fail to see how using Bitcoin in this situation is easier than coins? I'd prefer to just shove some coins in and off it goes. Using Bitcoin I'd got to arse about scanning codes etc... And if I can't get a signal on my phone I can't send them.

Bitcoin is great, but so is the convenience and ease of using cash.

Every time I go to get coins from the shops they look at me like I am a terrorist. It is not convenient at all to go hunting all over town for coins either.

It's really not that hard to put some coins aside when you get them in expectation of your laundry visit. Don't launderettes normally have lots of change any way?

[Bitcoin Oz]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

Don't get me wrong, I'm all for Bitcoin and that, but I fail to see how using Bitcoin in this situation is easier than coins? I'd prefer to just shove some coins in and off it goes. Using Bitcoin I'd got to arse about scanning codes etc... And if I can't get a signal on my phone I can't send them.

Bitcoin is great, but so is the convenience and ease of using cash.

Every time I go to get coins from the shops they look at me like I am a terrorist. It is not convenient at all to go hunting all over town for coins either.

It's really not that hard to put some coins aside when you get them in expectation of your laundry visit. Don't launderettes normally have lots of change any way?

They used to but it kept getting broken into.

[Bitcoin Oz]

They also break into the machines. Thats what junkies do.

If there is no actual cash on site and the bitcoins arent even stored there its less temptation for physical theft.

[hilariousandco]

They also break into the machines. Thats what junkies do.

If there is no actual cash on site and the bitcoins arent even stored there its less temptation for physical theft.

Don't the staff have plenty of change? The launderette my mate goes to he just asks the owner and they just swap him the money for change.

[empoweoqwj]

They also break into the machines. Thats what junkies do.

If there is no actual cash on site and the bitcoins arent even stored there its less temptation for physical theft.

The junkie would just try and steal the bitcoin reader and sell it ;-)

[Phinnaeus Gage]

I was sitting at the Laundrette with some clothes to wash after I had to go to the service station to get enough $1 coins to operate the machines when I realised how much easier it would have been if the washing machines and dryers had qr codes on a screen attached that worked when the right amount of bitcoins were sent to the machines.

So much easier than carrying bulk change around and you could also install a bitcoin atm there to get some bitcoins from. Waiting for confirmations wouldn't even be a problem since you are stuck there for however long it takes to wash your clothes....

...and if the confirmations don't come through, the tracked clothes are sprayed with crude oil, thus needing to be washed again.

Along with the big sign depicting, "All double-spenders WILL be prosecuted to the full extent of the law or, depending on on how we feel, your tracked clothes WILL be sprayed with crude oil. The Management. Thank you for choosing Woopwoop-Wishy-Washy."

[NorbyTheGeek]

you can hook all washing machine to basically a single mobile connection, but preferably you're gonna want a hard line.

this! if you fronted up the cost of a hard line you could have wifi running and attempt to charge people to use it while they're waiting for their washing... not sure if that would be successful these days where almost everyone has cheap mobile data.

Even in my little semi-rural midwest college town, we have a laundrymat that has wifi available already.

[LiteCoinGuy]

zero confirmations should be ok for such a business. only very small amounts of money.

[Bitcoin Oz]

They also break into the machines. Thats what junkies do.

If there is no actual cash on site and the bitcoins arent even stored there its less temptation for physical theft.

Don't the staff have plenty of change? The launderette my mate goes to he just asks the owner and they just swap him the money for change.

Maybe the one here is different in that it is left open when no staff are around.