Latest posts of: Bitcoin++

I've generated some vanity addresses with vanitygen
but I don't know how to print them as QR codes.

Is there any offline (e.g. javascript) way of doing this?

The best I could find was Bitaddress, but it only lets you import one key. I'd prefer to have 5-7 addresses on one sheet.

May you recommend eBooks about Bitcoin?

Free eBooks are particularly interesting.

Here's a list of Bitcoin Brainwallets and Paper Wallets.

Do you know any others?

Is there a way to look up any address online by typing the first few characters?

Say I want to find 1ESvmL4k3wHsthoADGD5EQXmyaCCHnYQei; it would be great to type in only 1ESvmL and then get the entire address.

Obviously such a service would only work for addresses that have at least one transaction.

What is the probability that the next block will be found within 10 minutes from now?

Or within 1 minute?
Or 10 seconds?
Or 1 second?

A year ago there was talk about a side-chain, Zerocoin (?) - what happened to it?
There's been a lot of hyping of a a Dark Wallet - but not much lately. Are the devs on the right track or has the project been abandoned?

And there's of course the altcoins. Darkcoin, Kryptonite, Monero - do any of these really have anything to offer, or are they just premine pump-n-dump?

Should we just conclude that Bitcoin is pseudonymous - and accept it for what it is Huh

I want to generate a multisig address. Alice, Bob and I shall have one key each.
How can I give keys to Alice and Bob and prove that I have not seen their keys?

If you need Testnet coins, you can mine some or get a few from a faucet.

If you require a larger amount, you can buy from me for BTC 0.0001 each.

PM me if interested.

Namecoins are merge-mined with Bitcoins. So anyone who mines Bitcoins is also interested seeing Namecoin succeed.

So why is it that some invest millions in mining farms but no one cares about the success of Namecoin?

Namecoin is actually a very good project that enables decentralized DNS. It just needs a tiny bit of development and marketing. A few thousand dollars is all it takes.

I cannot open my wallet anymore. It first happened a few days ago, and I haven't been able to since. When I double-click the icon on the desktop (targets the wallet file, has always worked) nothing happens. All I see is that the computer hourglass (or circle as it is now) shows for five seconds, then nothing.

I use Win7, 64bit.

My wallet has roughly 300 transactions and 100 addresses used. Other wallets open as normal.

I have the same wallet on another machine. It works there, albeit slowly.

I guess the problem is that too many transactions clog the program. But why does it not open at all?

Latest block 320330.
59 minutes old.
See blockchain info.

Has there ever been such a long block time? New record?

I couldn't believe my eyes when I saw Cointerra's prices : http://mining.cointerra.com/shop/

2 TH/s Plan : $7,999–$11,999

Thats $4 per GH, equal to 0.0084 BTC.

CEX.io's GH contract is "only" 0.0038 BTC.

Bitmain's Ant S3 sells at 0.0013 BTC per GH, and even this is so expensive that you'll likely never break even (or ROI as so many like to say).

I guess it's not a crime to sell apples at $100 per pound, but to all mining n00b's I say ... you better get another hobby. If you want to get involved with Bitcoin, very good, buy some coins at an exchange and/or spend your efforts on making apps/services related to BTC

Can even a chip manufacturer mine profitably these days?
Even if the hardware is cheap to produce, there are huge logistical costs with operating large data centers, not to mention locating to another country with cheap electricity.

Is cloud mining the reason new hardware / data centers are set up?
If you can sell your capacity as expensively as CEX' contracts, you'll make a whopping 3.8 BTC per TH upfront.
You'll even make more as you go along from overpriced maintenance and electricity (meaning some of what you is paid back to customers, and some you keep yourself).

Is it possible to set the operating temperature higher, e.g. at 50C ?

The intent is to run the Ant hotter so that the equilibrium fan speed will be slower.

The growing size of the Blockchain may kill Bitcoin.

At its current 20GB and linear growth it is manageable assuming normal use. My concern is that people will find other uses that bloat the chain, or that an attacker will spam it.

It is cheap to embed data at 0.01 mBTC per kB. That's half a cent per kB. 1 MB of data costs $5 and one GB costs $5000.

An attacker can add 10 GB for $50,000 only... or 100 GB for half a million. This is much cheaper and convenient than acquiring 51% of all ASICs.

Regular users are also a threat. Once they discover that they can use bitcoin to store data, you'll have all sorts of love poems etc forever on the blockchain.

The worst potential use is by terrorists and pedophiles. Imagining them embedding videos. No thanks! Huh

Since the ASIC solves double-SHA256 and this is used in generating bitcoin addresses, may mining hardware be used to generate vanity addresses?

I don't understand how anyone can make a profit now, even with cheap electricity and no VAT.

You can still make a small profit running your existing equipment, but no way investing in new equipment can be justified.

Is the current spike in hash rate due to:
Randomness?
Hardware turned back on after summer?
Investment back log?
Irrational investors?
Or people buying miners for heating?

I'm going to London and seriously consider withdrawing GBP from a Bitcoin ATM.

Just need an answer, what are the fees and is it cheaper than using a VISA card (including exchange rate markup)?

I've placed Antminers around my apartment for heating this coming fall and winter. Steps made:

1. Undervolted and underclocked. 140 GH @ 185W.
2. Placed conveniently on shelves in most rooms except bedroom. Will run 24/7 as long as mined bitcoins are worth more than electricity. After this point will only run when I need heat.
3. Connected Ants to TP-LINK wifi routers. These are very stable, and are connected with cable to miners.
4. Fans were dissembled, then vacuumed the heat sinks, and then put fans back on.
5. Fans now run reasonably quiet at <1800 RPM. More silent than AC but would ideally be even more silent. Any tips?

Quote

Specifications:

Hash Rate: 453 GH/s±5% with great OC potential

Power Consumption: 355 Watt at the wall

Power Efficiency: 0.78 J/GH on wall

The price is 0.46 BTC.

It's a cool kit but VERY EXPENSIVE. I did some calculations at Bitcoin Wisdom and it will most likely make a tiny, tiny profit of 0.1 BTC or so.
And this is without taking into consideration that the S1 anyway would generate more than that if I leave it running underclocked and undervolted.

Will YOU buy the S1 Upgrade Kit? If so, what is your reasoning?