Predictions are difficult, especially about the future :-)

Nobody can say for sure whether and when the transaction will be mined.

If any of the inputs used for that transaction is used in another transaction that is mined successfully, you'd have a true double spend situation. I don't know exactly how well nodes and miners take care to avoid this, but I think they would refuse transactions as long as there are conflicting transactions in the mempool.

Can you talk with the client about this situation? He's probably less than happy about not receiving what he bought from you, but he or his wallet is at fault for using an unconfirmed input in a transaction, so he can't really complain about your reluctance to ship goods before at least one confirmation arrives. If there's an appropriate level of trust between you and him, you might get him to send a new payment and assure him that you'll send this original payment once it is confirmed.
You might even create a new transaction sending the unconfirmed payment back, adding one link to the unconfirmed transaction chain. Of course you would do that only after you've received the good payment, but it would make the repayment automatic and independent of you watching the blockchain...

Onkel Paul

The transaction contains an input from a previous unconfirmed transaction (actually there's a chain of these unconfirmed transactions).
You can follow them on blockchain.info by looking at the inputs - one of them has a red "U" which means the transaction from which this input came is unconfirmed. Click on the "output" link next to it, and you will see that transaction. The original unconfirmed transaction in the chain is https://blockchain.info/tx/c88b7b9c66869aff11c7719d256c28307c6bad654eeac48cd2152af27f5fee46.
That transaction did not contain a miner fee, this is probably the reason that it isn't mined yet. Once it is mined, the others in the chain will probably be mined as well, either in the same block, or in one of the next blocks.

Onkel Paul

Die Transaktion benutzt den Ausgang einer anderen Transaktion, die noch nicht bestätigt ist, weil sie keine Miner-Gebühr enthält:
https://blockchain.info/de/tx-index/109481502/1

Erst wenn diese Transaktion in einen Block aufgenommen wird, kann auch die zweite Transaktion gemint werden (wahrscheinlich dann im gleichen Block).
Vorher wird das nix :-(

Onkel Paul

Mining should be possible, since testnet is for all practical matters similar to the main network.
I don't know whether there are testnet pools you could point your ASIC at, but it might even be possible to solo mine on testnet due to low difficulty (then you get a whole block reward, not just one or two coins).
However, since testnet coins are almost worthless, you might be able to get a couple from some friendly member here (sorry not from me, I'm friendly but don't have testnet coins :-) )

Onkel Paul

There is a mechanism called CPFP (child pays for parent) which is currently implemented by one pool only as far as I know (Eligius).
This mechanism allows you to send a transaction spending one of the outputs of the original transaction with a higher fee that would suffice for both transactions. A Miner implementing CPFP can get the fee from this second transaction only if it includes the first transaction, too.
However, I would not put too much hope on CPFP - I just found a reddit thread discussion this, and it looks like it's not really working: https://www.reddit.com/r/Bitcoin/comments/3r1dad/what_pools_implement_cpfp/

So apparently your only option is to wait. Eventually your transaction will be mined.

Onkel Paul

The transaction fee (0.00009572 BTC) is a bit small for a 1224-byte transaction.
See https://en.bitcoin.it/wiki/Transaction_fees for an explanation and standard fees (don't know whether the numbers are representative, miners may have their own policies).
Did your wallet software compute the fee? Maybe you need to change the settings to some higher value.
Your transaction should be mined eventually, it might just take a little longer.

Onkel Paul

FTFY

Onkel Paul

First of all, ownership (or "right to use") of a file is difficult to enforce without ugly DRM mechanisms that usually only work in an asymmetric producer/consumer relationship where producers do not only distribute content but also control the hardware/firmware that's being used to consume the content.

A blockchain mechanism can only be used to document rights, not enforce them. Ownership of bitcoins is enforced by the transaction mechanism and the fact that all nodes and miners (ideally) adhere to the same rules, which always ensures that a majority of the network will reject transactions that don't conform to the rules.
Control over some information can not be enforced in such a way. There is no mechanism (except for the aforementioned ugly DRM) that can enforce that you don't create a copy of a file before you transfer it to someone else.
Of course, a blockchain can be used as a ledger documenting arbitrary legal statements, and such a ledger can be very useful to resolve issues when one party claims that the other party broke their contract. It can never prevent anybody from breaking a contract, and it can neither ensure that such breaking can be detected.

Onkel Paul

Can you see how many bytes the transaction has? If your wallet contained a lot of "dust" (small payments from faucets, for example) then the transaction fee might be too low for the size of the transaction data.

Onkel Paul

Stamp und Finex bei 350...
Ist noch ein bisschen früh zum Schlafen gehen, kommt grad noch ein schöner Film in den BTC-Charts...

Onkel Paul

Es ist ganz einfach so, dass du jetzt (sehr teuer) gelernt hast, dass die Irreversibilität von Bitcoin-Transaktionen und die Reversibiltät von anderen Zahlungssystemen wie Skrill, Paypal, Kreditkarten etc. nicht zusammenpassen.
Leider sind geklaute Konten in der Online-Zahlungswelt "ganz normal". Händler müssen sich täglich damit auseinandersetzen, dass sie einen Teil des Geldes nicht bekommen, das ihnen zusteht, weil wieder irgendein Honk geklaute Kreditkartendaten auf dem Schwarzmarkt gekauft und damit satt hochwertiges Zeug bestellt hat. Bei Versandgeschäften hat man zumindest noch einen Anhaltpunkt, wo die Ware hingegangen ist, aber bei Bitcoin geht das nicht.

Deswegen ist bei all diesen Zahlungsverfahren extreme Vorsicht angesagt, ich würde das wirklich nur machen, wenn ich das Gegenüber kenne oder wenn es um einen kleinen Betrag geht, den man zur Not als Lehrgeld abschreiben kann. Du hast mit dem Anfordern einer Ausweiskopie schon versucht, auf der sicheren Seite zu sein, aber es ist inzwischen offenbar absolut gängig, dass auch für so was geklaute Daten verwendet werden.

Helfen (im Sinne von Empfänger identifizieren) kann dir hier wohl keiner - auch wenn Bitcoin nicht 100% anonym ist, ist das Verschleiern von Zahlungsspuren schon recht einfach.
Ich muss eingestehen, dass mir das bei meiner Foren-Signatur schon ein bisschen zu schaffen macht, weil Mixer-Services für Kriminelle natürlich erste Sahne sind, aber genauso wie ich mit Bargeld bezahlen kann, ohne dass ich für den Verkäufer ein offenes Buch bin, sollte das auch bei Bitcoin zu den selbstverständlichen Rechten gehören.

Onkel Paul

Mir würden 350 auf bitfinex vorm Schlafengehen erst mal reichen - darauf habe ich meinen Ticker-Alarm gestellt, und dann würde er mich nicht unnötig wecken.
400 am Morgen ist natürlich auch ok 

Onkel Paul

It's hard for me as a professional software developer to see what you actually want or need. You're listing a number of requirements that make sense to you but are probably incomprehensible to your target audience (unless your target audience already knows what you're talking about, then I'm obivously not part of the target audience .)

It might be much easier if you'd describe concrete use cases instead of abstract requirements.
For example, you mention linking/delinking of IDs to and from the smartapp. What is this supposed to mean in the actual use case?
The other things that's not really clear to me is the kind of services you mean. Utilities like water, electricity, phone service? Transport or distribution services?

Onkel Paul

Danke, hab 3 Angebote von 3 vertrauenswürdigen Leuten bekommen und einen rausgepickt, aber die anderen wären offensichtlich genauso gut gewesen.

Onkel Paul

Hallo zusammen,
ich würde mir gerne einen PDF-Download kaufen, den der Autor gegen Paypal-Bezahlung (10$) anbietet, ich habe aber kein Paypal und will mir auch nicht extra dafür ein PP-Konto zulegen.
Deswegen suche ich eine vertrauenswürdige Person, die das für mich machen könnte und dafür Bitcoin akzeptiert.
Da der Autor die Sachen im Selbstverlag anbietet, will ich auf keinen Fall, dass mit der Zahlung irgendwas schiefgeht oder zurückgebucht wird, bin also wirklich auf zuverlässige Abwicklung angewiesen.

Hat jemand Lust, das zu machen? Dann bitte PM an mich.

Onkel Paul

It's between approximately 2 years, 6 weeks and 2 years, 10 months of forum membership when you post on average once per day and post in every two-week activity period.
If you pause for some time or post less on average it will take longer, of course.

Onkel Paul

Hey, will there be a (virtual) party when folks in this thread get their legenary status? I'd like to join :-)
Now that the forum has grown so old that many early members attain legendary status, there probably should be higher ranks for the really old farts!

Onkel Paul

Yet we already have that unit(s): m and µ prefixes as borrowed from the SI system work pretty well (I hope to see the day when prices for everyday items are expressed in µBTC because nobody wants to count zeros after the decimal dot of mBTC values...).
What's missing is not the unit but the education so that everybody using BTC also knows what mBTC and µBTC mean.
Wallet programmers might contribute a little towards this education by prominently showing a short explanation of these units in the settings area of their applications where the unit for display is selected. I've just checked Mycelium on my phone, it does not do this :-(

Onkel Paul

In the blockchain, only Satoshis are ever dealt with.
Other units are entirely a matter of convention and coding in the software dealing with bitcoin transactions and amounts.
I think all wallets have options to show bitcoin amounts in different units (mBTC should be supported by most, many will also handle µBTC.)
You can just use such an option if you like, but your choice should not limit the choice of someone else who prefers to see fractional bitcoins in her transactions.

Onkel Paul

XT is not "another system" but a potential fork. Whether it will gain a majority is unclear.
Whenever a cryptocurrency enjoys/suffers a fork, transactions mined before the fork stay visible in both branches, so you don't need to fear for your BTC.
However, anything done in one branch only isn't visible in the other branch.
In reality, should a fork actually happen, one of the branches will die out relatively quickly, depending on what the majority of miners prefer.

Onkel Paul