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681  Bitcoin / Development & Technical Discussion / Re: [ANNOUNCE] Micro-payment channels implementation now in bitcoinj on: June 27, 2013, 08:11:48 PM
So, reading https://en.bitcoin.it/wiki/Contracts#Example_7:_Rapidly-adjusted_.28micro.29payments_to_a_pre-determined_party I don't understand what prevents double spending of the input used to fund T1.

T1 redeems an input that is sent to an output requiring both the server's and the client's signature to redeem. But what if, when the exchange is over, and I've gotten what I wanted from the server, I send out a new transaction that redeems the same input redeemed by T1, but with a higher fee to miners, that sends all coins back to myself?

In other words, what is it, in essence, that makes this any different from just showing the server a transaction that sends coins to an address that belongs to the server? And rapidly updating this transaction?

The time-locking makes it possible for both parties to work trust-free.

So if the session gets initiated with one day time lock, the first transaction sending all the money to the server may not get used as the input to send it all back within this one day, but both parties sign an "all returns" transaction in the beginning. Apparently bitcoin protocol supports a "sequence number", so the highest sequence number wins and both parties are allowed to provide a higher sequence number (signed by both parties) within the time lock. Ingenious Smiley

(So this is not a real micro-payment in the sense of a service collecting satoshis from many clients but the service could collect *increments* of satoshis from many clients each paying some dollars in the end, which is really really great.)
682  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 27, 2013, 06:52:56 PM
While German news that Bitcoin can be cashed out after one year of holding (instead of paying 25% of taxes) is a bullish news for me, it could also mean that people that were thinking about sneaking out their early adopter coins now openly sell them via gox which would be bearish. Make of it what you want, for me it's definitely mid term bullish.
683  Economy / Service Announcements / Re: Bitmit - Bitcoin shopping mall - Bitcoin market place - Bitcoin auction house on: June 27, 2013, 06:05:22 PM
Is it safe to ship a notebook (worth 300€) to a buyer in Nigeria or is it just scam? Cheesy

Are the coins in escrow? Make sure you make a registered shipping and if you have some reputation, please don't discriminate users in Nigeria. Even if some stolen coins made it to Nigeria, I doubt, bitmit will take care of getting you exactly the coins in escrow, so Bitmit will launder coins for you and you should be golden. So where should be the scam (for you)?
I would love to see Nigeria and all Africa to use Bitcoin. Think about where unbanked people are and think about what people might ignite for bitcoin if bitcoin works for them, so please ship that damn thing and make sure you can convince Bitmit you did, later on.
684  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 27, 2013, 01:04:27 AM
Pressure's building, soon its going to go Pop!

like "pop to $180/Ƀ"?
685  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 26, 2013, 04:19:47 PM
Neither do I like that I have to click twice to open a wallet. This should be the default behavior when clicking wallets.
Alternatively add buttons to "update balance", "open", etc.
how to get to the context-menu (delete key, delete address,...) then? long-press? would make sense.
[/quote]

Long press is common but 50% of your users will not find the config button if you make it red and occupy 50% of the space, so long press will reach about 5% of the users without watching the how-to videos on youtube. Seriously, I know what I'm talking about. 20% of customers contacting me request features that exist in fluxcards. They just didn't find the context menu even after I added a menu button right in front of their noses. The screen of my app that you use 90% of the time, has a dedicated menu button and people don't press it. (granted it is not the best design for a button but still I thought people assuming it not to be a button, would hit it accidentally anyways)
686  Economy / Service Announcements / Re: [ANN] LocalBitcoins.com - a location-based bitcoin to cash marketplace on: June 26, 2013, 05:08:38 AM

- site does not remember location, sometime it requests to access my location, sometime I have to type where I live

Yeah - the autodetection of location is not very useful. It guesses my location as being on the other side of the continent. Thousands of km away.
I don't use a VPN or anything fancy - but I guess some IP address geodata database has some bad entries.

I'd much prefer just to be able to type in a location and have it remember it.

Yes, pliis.
687  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 26, 2013, 02:43:25 AM
Im going to pretend yesterday never happened, because it made absolutely no sense that bids and asks filled in quickly enough to hold off constant 4k-8k market orders in both directions..

CONSPIRACY!
Whale humping. Some iceberg order bot running amok. Whatever. Time will tell.
688  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 25, 2013, 09:54:27 PM
Any good android market watcher apps?

The last one I tried ran so hot and drained the battery in an hour.  I think it must have been trying to mine on my phone!   ...I just watch preev.com on my phone.

Just don't mix wallets and fishy bitcoin apps. I wouldn't go as far as to suggest to have a dedicated phone for your self-compiled and reviewed android wallet yet but this day will come soon. If some minor developer of angry birds can sneak in a 2kB snippet that empties 10,000,000 wallets at a snap, this evil guy will do it. I mean even if he gets caught, he might have a higher cause to do so and the money will never find its way back to the owners.

A bitcoin hater could even send the money to /dev/null
Edit: Wonder what he would get prosecuted for in such a case Smiley
689  Other / Meta / Re: Bounty to nuke Alt-Coin board on: June 25, 2013, 05:05:27 PM
Oh I thought you pledged a bounty to attack alt-coins. I'm sure many people are mining them only for the quick profit, so these would attack alt-coins for bounties just as well.
690  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 25, 2013, 04:25:55 PM
I guess I know why it is the way it is but from a user perspective it is annoying to have a list of "wallets" without balances on them. I wouldn't want to have to hit all of my 20 wallets, hit open, wait for a balance to load from the server, swipe left, scroll down searching for where I was last to find a suiting wallet to pay whatever I'm about to pay now.

Neither do I like that I have to click twice to open a wallet. This should be the default behavior when clicking wallets.
Alternatively add buttons to "update balance", "open", etc.

Labeled addresses should not have the receiving address huge as it is now. Labeling a key should make it smaller and more readable and not bigger.

Maybe when deleting an address, in addition to the warning talked about above, offer to swipe that address to another address.

Maybe allow me to hide or otherwise order addresses. Now the most recent address is the one I have to scroll down most. They should be ordered by either manual order or least recently used/created.

A friend of mine put Bitcoin Spinner on her Android phone and loaded it with one bitcoin. An hour later, she dropped it in a bucket of water
Sorry I lolled Smiley Where did she find "a bucket of water" to drown her Android in?

Spinner has its keys only in the internal memory. You would need to root it to access them. Tough luck if the system is encrypted.
Don't through away the phone. Consider it a physical bitcoin Smiley

(sorry, I'm in a troll mood)
691  Bitcoin / Bitcoin Discussion / Re: There are only 21 THOUSAND bitcoins on: June 25, 2013, 05:52:13 AM
mbits


is mBTC an official term? Or just kind of a slang that BTC users use?

Yeah actually the king of Bitcoin declared it official just yesterday.
692  Bitcoin / Bitcoin Discussion / Re: POLL: Allow dust transactions in Bitcoin? (5430 satoshis or less) on: June 24, 2013, 11:36:17 PM
I'm slightly confused not to see a single mention of colored bitoins in this thread.

Colored bitcoins take one transaction as the genesis transaction of, lets say, a stock. Now the output of this transaction has dust value to you but maybe great value to a stock owner.

A contract like "I hearby declare that this 1,000,000 Satoshis deposited via transaction A in address B represent stocks of my company XY and everybody holding them has the right on dividends and voting" would allow me to run stocks of my company based on what is 0.01Ƀ worth of bitcoins to you but a million stocks to me and my fellows. How can you declare storing these stocks not economical?

I guess this kind of alternative uses for Bitcoin were intended and do good to the overall legitimacy of Bitcoin. Sure, if we not only "destroy the banks" but at the same time "destroy the stock exchanges", the establishment might get slightly mader, so maybe we should keep this bullet for the next round.

Then find someone willing to relay and mine it.  Problem solved.

Nothing in 0.8.2 PREVENTS you from doing that.  Some people might not share your view that it is a beneficial use of a critical resource.  Should they be forced to relay and mine your transactions?

0.8.2. doesn't make any transaction regardless of size prohibited.  No block will be rejected even if it is 100% full of spammy garbage. 

However just because you have FREEDOM of speech doesn't mean others have an OBLIGATION to listen.  Likewise just because you can create spammy garbage doesn't mean that other nodes should be forced to relay it.

Well then the 0.8.2 doesn't solve any problem. If you don't make the fees scale with the costs, things make no sense. Anybody may include garbage and take a fee or not for that and for all eternity people have to deal with this extra data. We should just assume to have full blocks and miners should include transactions based on the fee in relation to the costs for the network and not in relation to some assumed economic value of that particular transaction.
693  Bitcoin / Bitcoin Discussion / Re: POLL: Allow dust transactions in Bitcoin? (5430 satoshis or less) on: June 24, 2013, 09:56:33 PM
I'm slightly confused not to see a single mention of colored bitoins in this thread.

Colored bitcoins take one transaction as the genesis transaction of, lets say, a stock. Now the output of this transaction has dust value to you but maybe great value to a stock owner.

A contract like "I hearby declare that this 1,000,000 Satoshis deposited via transaction A in address B represent stocks of my company XY and everybody holding them has the right on dividends and voting" would allow me to run stocks of my company based on what is 0.01Ƀ worth of bitcoins to you but a million stocks to me and my fellows. How can you declare storing these stocks not economical?

I guess this kind of alternative uses for Bitcoin were intended and do good to the overall legitimacy of Bitcoin. Sure, if we not only "destroy the banks" but at the same time "destroy the stock exchanges", the establishment might get slightly mader, so maybe we should keep this bullet for the next round.
694  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 24, 2013, 12:06:31 AM
forbes.com/sites/jonmatonis/2013/06/23/bitcoin-foundation-receives-cease-and-desist-order-from-california/

Bye, BTC Foundation

Let them take some heat for all the others with less legal backing. This might be the test if the foundation is worth the donations they receive. If they opt for claims that delay a decision on the case for years, they will not get my money for years.
695  Bitcoin / Bitcoin Discussion / Re: There are only 21 THOUSAND bitcoins on: June 21, 2013, 10:00:34 PM
Apparently there are not many mathematicians here. Of course after normalizing the problem there is only 1. People into Finance would call it 100% which is not really much different to saying 1.
For any limited resource that only has speculative value it only matters which share of that resource you hold and what value all of that resource has. That said, people use units of account that relate to their every day transactions which for now for the most people are in the cɃ order of magnitude or mɃ for expressing all you really need to know about the price of any purchasable good. If you move stocks, you will stick to Ƀ or kɃ. MɃ certainly is only interesting for Satoshi himself and maybe one other individual.
696  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 21, 2013, 03:30:43 PM
Thanx Jan for your feedback. "Annoying dialogs are annoying ;-)" and you have too many of them. Why ask long questions along the way when you can have a form like in spinner? When sending, I want an address field with auto-completion from my labels, a paste clipboard and a qr button like in spinner. I want a "personal notes aka label"field that is optional.
697  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: June 21, 2013, 01:10:05 AM
Today I read some very good news:
Mycelium Wallet, the successor of Bitcoin Spinner is in open beta:
698  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 20, 2013, 09:25:11 PM
Regarding the backend servers: Currently it is not really feasable to set up such a server by yourself. The servers are constantly evolving and we are using them not only for the wallet, but also for other upcoming projects. It connects to many regular nodes in the Bitcoin P2P network and provides convinience methods for this app+ others as well. In this first release we use hardcoded dns names, and we check for a specific SSL fingerprint (sorry, Iran..) The Mycelium Bitcoin Wallet connects exclusively to these servers, chosing them randomly. (this is all documented in the source) If you want to migrate from our app somewhere else i am sure you can import the key somehow.

"sorry, Iran.."? I have friends with bitcoins in Iran. What are the implications for them?

Ist the server API easy to replicate for the needs of Mycelium? Will such a (boiled down) server also be open source from your team?

I know that with the private keys at hands, there is no vendor lock-in, still it would be cool if you were rather open than closed. It's not your obligation to provide an open source server of course. This will come anyways.
699  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 20, 2013, 07:57:28 PM
I just sent 2mɃ to the address visible in your market screenshot. Hope you received my test payment. I don't particularly like that I have to enter the address first, as in this particular case I only wanted to see how mɃ work in the send screen. I sent you 2mɃ rather than 1 to make sure I don't send you 1Ƀ for some stupid bug that missed the "m" in mɃ.
Other cases might be that I wait for the other to bring up his QR code and meanwhile enter the amount (and the label for the address to come. Yes, I want to be able to lable in the send screen optionally).
700  Bitcoin / Wallet software / Re: BitcoinSpinner on: June 20, 2013, 07:46:24 PM
  • Redundant backend servers with client side load balancing
Please elaborate! How do I set up such a server? Does Mycelium connect to regular bitcoin nodes? How many does it connect to by default? How does it bootstrap?
I have 1BTC on my Mycelium Wallet and keys are backed up. I love the speed of this first transaction and playing around and assume this wallet already is faster than the "old" Spinner but should I use this or the other next week on my Bitcoin Conference? Spinner sometimes fails to connect, Mycelium might eat my coins life on stage?
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