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7781  Bitcoin / Bitcoin Technical Support / Re: Sent bitcoins to wallet before it finished syncing.... on: February 09, 2015, 12:06:52 PM
...
What if I did a request for payment from bitcoin core -> greenaddress, would there be a fee for that?

I am having problems copying my bitcoin core over to my external hard drive though. Thank God it's still on my C:\ right now. I followed that link and copied and pasted the roaming\bitcoin directory to my hd and loaded that on a different laptop and it was out of sync by a couple years. More searching and I came across a way with using mlink dos command and I've tried a couple variations of that and still no luck. And it takes sooo damn long to copy and paste this to my slow 5400 rpm external.
AFAIK, there is no way to directly send a payment request onchain. The wallet would just generate a QR code or address, you have to manually key in or scan the private key. This process is free-of-charge.

Do try to backup your wallet first before messing with the data directory, you may accidentally delete it. Have you set your data directory to the place where the data directory is?
7782  Bitcoin / Bitcoin Discussion / Re: Block chain size/storage and slow downloads for new users on: February 09, 2015, 11:19:13 AM
The fact that, since the mid-20th
century, the cost of data storage and the cost of
computing power have been decreasing exponentially
year after year, regardless of technological challenges,
market crashes, or anything else. Surely Bitcoin may go
througn growth spurts, but eventually blockchain growth
will become linear (when we hit the block size limit, or
when we remove the limit and let the transaction
frequency reach an economic equlibrium based on tx
fees). Either way, I see no big problem, and I've been
running a full node for several years without any
additional cost.
One of the problem here is the disk space and the other would most probably be the read/write frequency that would shorten the drive's lifespan. Every time a blocks gets mined, the blocks would have to be written to the disk and you would also have to read the files when a peer request a block from you. This MIGHT impact you due to the amount of read and write required and the chances of shortening the lifespan would be pretty high.
7783  Other / Beginners & Help / Re: Bitcoin Address Question on: February 08, 2015, 12:35:26 PM
if thats the case, why do ppl have their bitcoin address on their profile such as for donations etc.  So they change it every single time they receive even 1 donation?  That wouldnt make any sense.

The reasons mentioned in the wiki article for not reusing address are very trivial.
Even when you look at most significant of them all (security), you'll see that the chances of happening it is close to zero - there has been no successful double-spend in Bitcoin's history.

It is totally possible to reuse an address and people do it all the time.

The Wiki page doesn't mention anything about doublespending or did I miss it? However, there is one successful double spending which occurred at the last fork, March 2013 (https://bitcointalk.org/index.php?topic=152348.0). The vulnerability in the K value has happened before, once with android and once with blockchain.info. So, it can happen but it would be unlikely with open-source desktop wallets.
7784  Other / Beginners & Help / Re: How can I "protect" my wallet on: February 08, 2015, 07:40:33 AM
All you need to do is encrypt it.

And have an anti virus installed to detect and remove keyloggers.
I hate to say this but this method is seriously flawed. Encrypt the wallet with what? There are programs which allows people to bruteforce the encrypted files. Furthermore, whenever you use the wallet, you would have to unencrypt it using the password. In the process, a keylogger or malware on your computer would have captured it already. Antivirus CAN remove viruses and malwares but ever heard of crypters? They can allow the virus to pass the AV's test with no detection. If this happens, your wallet would be ultimately hacked.

Encryption of the qt-wallet is really strong. If you choose a long enough password with random characters, there is no way to brute-force it. I recommend a length of 15 or more characters.
Whenever you have to spend it, you would have to unencrypted it, in the process, the password can be stolen and the wallet will be hacked. It depends on how secure is the encryption method, if a vulnerability is found or the hashing method is weak, your bitcoins will get hacked.
7785  Other / Meta / Re: How long does the 360 second limit apply? on: February 08, 2015, 06:04:55 AM
When you're a jr member it will decrease.

When you're a member it's gone.
Wrong, when you reach a member, the wait time will be reduced significantly, I don't really notice it since I lost slowly. It should be unnoticeable but if you post, login, pm or report post then do any of the actions again very quickly, the warning will appear.
7786  Other / Beginners & Help / Re: Bitcoin Sending/Receiving Fee Question on: February 08, 2015, 06:01:02 AM
So i have blockchain and electrum and will only use these 2 to send/receive btc from gambling sites.  First off, receiving btc is always free right?


For sending btc... i dont have any on blockchain or electrum but when i enter a number of btc in electrum it shows the btc fee as 0.0002 which is around 4 cents usd.  But with blockchain is it the same as in 0.0002 btc?  Im confused b/c i thought sending btc cost 5 or 10 cents... read that a while back.  So does using different way of sending it have different fee?  Such as multibit vs electrum or even hardware wallet?  I know its no big deal but curious on this.

you can change the fee in blockchain and in other wallets. And even send without fees on blockchain and on bitcoin core.

But if you send without fee your transaction might get stuck forever.

Won't you get it back once it drops from the memory pool? 
It really depends on the client's behaviour, sometime the client would rebroadcast it continuously and it won't be dropped, thus you can't respend it. Also, your transaction will not get stucked, it will stay there till the priority reaches 57,600,000 as your coin age increases and will be included in the block depending on what is the miners transaction policy of the next block.
7787  Other / Beginners & Help / Re: How can I "protect" my wallet on: February 08, 2015, 05:57:04 AM
All you need to do is encrypt it.

And have an anti virus installed to detect and remove keyloggers.
I hate to say this but this method is seriously flawed. Encrypt the wallet with what? There are programs which allows people to bruteforce the encrypted files. Furthermore, whenever you use the wallet, you would have to unencrypt it using the password. In the process, a keylogger or malware on your computer would have captured it already. Antivirus CAN remove viruses and malwares but ever heard of crypters? They can allow the virus to pass the AV's test with no detection. If this happens, your wallet would be ultimately hacked.
7788  Bitcoin / Bitcoin Technical Support / Re: How to move bitcoin balance from a wallet to another wallet on: February 08, 2015, 05:51:03 AM

Coinbase uses shared wallets on the main account(not the vault). You will and should never gain access to the keys, they are transfered to a main wallet or gold storage and your coins are sent from there whenever you make a withdrawal.

so it is like MtGox, once they decided to shut down, all the coins will be gone.

they just struck a deal with Paypal recently, so maybe I can trust them to not shut down anytime soon? It wouldn't benefit Paypal if they do that, and Paypal had been around for years.
MtGox's shut down was due to a 'hack'. Coinbase MIGHT be trusted but there is nothing that is stopping them from claiming thatthey got hacked and declare bankruptcy like MtGox. MtGox has a history of bad reputation but people still trusted them, it is fairly obvious something like this is going to happen. The best practice is to have a private key that only you yourself is aware of and you can control it fully even if the service goes down.
7789  Bitcoin / Bitcoin Technical Support / Re: How to move bitcoin balance from a wallet to another wallet on: February 08, 2015, 03:52:09 AM

Create a localBitcoin advertisment and people would contact you if they are interested in the trade, they are more likely to be interested in higher amounts. The online wallet part depends on what kind of wallet you are using, some wallets give you full control of your private key which allows you to access it even if the service goes down, if you keep a backup. Use opensourced wallets whenever possible and compile it yourself. Precompiled ones offer less assurance of it having no exploits.

so coinbase didn't give me the private key, should I ask them for it?
Coinbase uses shared wallets on the main account(not the vault). You will and should never gain access to the keys, they are transfered to a main wallet or gold storage and your coins are sent from there whenever you make a withdrawal.
7790  Bitcoin / Bitcoin Discussion / Re: Real world use of BTC on: February 08, 2015, 02:47:01 AM
AFAIK there is a newly married couple who went around the world solely on Bitcoin. The website is here: http://lifeonbitcoin.com/. It actually turned out to be pretty successful. It is actually possible for people to live of bitcoin as the adoption rate rises.
7791  Other / Meta / Re: Activity levels on: February 08, 2015, 02:40:08 AM
Wrong section, this should be in meta. It takes 240 and 480 activity to rise to Sr member and hero member respectively.
7792  Alternate cryptocurrencies / Mining (Altcoins) / Re: Only have enough $$ to buy one mining rig... SHA-256 vs Scrypt Mining?! on: February 08, 2015, 02:37:07 AM
Buy a rig for both and see which one is better for you. Then dump the other one on ebay.
 Don't forget there are sha-256 alts as well. Best of luck!!!

You would still be getting a loss. Used ASICs would get lower price than new ones. It is better to make the decision before buying. As said, both of the coins are volatile, the price may drop suddenly.
7793  Bitcoin / Bitcoin Discussion / Re: Chinese Bitcoin Mine That's Making $1.5M a Month on: February 08, 2015, 02:31:19 AM
Chinese Bitcoin Mine That's Making $1.5M a Month

6 of these locations in china secure and process 3% of the Bitcoin transactions.

http://motherboard.vice.com/read/chinas-biggest-secret-bitcoin-mine

 

Is it Discus Fish anyway ?

I don't think so as they state in the video that their computing power is good for 3 percent of the network.

DiscusFish aka F2Pool has a far higher percentage of the network.
It is possible that they are part of discus fish and they mine for them. Since it is a pool, they can very well be a part of them and mining with other miners.
7794  Other / Meta / Re: How long does the 360 second limit apply? on: February 08, 2015, 02:20:25 AM
Surf around the forum for 6-7 minutes and come back to post, the limit should have lifted. The reason being the system can't detect you being active if you dont send some requests to the server. The limit will decrease as your activity rises. When you reach member, the time would be roughly the amount of time you would take to construct a constructive post.
7795  Bitcoin / Bitcoin Discussion / Re: Chinese Bitcoin Mine That's Making $1.5M a Month on: February 07, 2015, 03:46:31 PM
The amount of miners in just one facility is already huge, let alone 6. I wonder how would they keep up with the maintenance of so much devices. And the heat generated would be huge with the increasing difficulty and dipping prices, the chances of profit are lower now.
7796  Bitcoin / Bitcoin Discussion / Re: Some BTC addresses start with a "3" on: February 07, 2015, 05:20:26 AM
...

When I have nothing better to do, I sometimes browse the blockchain via blockchain.info.  Really just to get a better feel for different kinds of transactions and to learn a bit more (some of you know I am a relative beginner who has pretty much had to "learn by doing" and not a programmer).

(Some time ago, I asked bitcointalk about addresses that have a small letter (after the 1) vs. a CAPITAL letter, and I also asked about how a small percentage of addresses have ONE less alphanumeric in their addresses vs. the overwhelming majority of others.  The answers I received explained BOTH points very well.  Thanks!)

Well, here is another little oddity I have seen recently.  A small percentage of addresses (maybe 0.5% -- one in 200 or 300 addresses) start with a 3.  One very interesting address that moves a LOT of BTC around (and starts with a 3) is at Block Height 342350 (won by Slush).  A LOT of BTC!

There are only some 93 transactions at 342350, so if you want to see for yourself, just drop by and scroll down.  That "3" address is the only one I saw there.

Why is it that some addresses start with a 3?

*  *  *

I guess that a second question is in order.  Is posting a public address (like the one starting with "3" at 342350) considered "Bad Form" here at bitcointalk?  

Hey, I don't want to cause any trouble around here...
Address starting with 3 is a multisignature address, a address requiring 2-of-3 signatures to be able to be spent. It is an address associated with more than one ECDSA private key. It is usually used as cold storage as it is harder for one to steal 2 private keys compared to 1. It can also be a protection against malware as you could keep the keys on separate computers. Keeping one of the three keys safety is also a good practice, if one of the keys is lost, the bitcoin can still be spent using 2 of the remaining keys. It can also be shared between multiple people, majority of the people can vote and spend the coin.
7797  Other / Beginners & Help / Re: Bitcoin Sending/Receiving Fee Question on: February 07, 2015, 05:10:07 AM
Usually the fees are auto calculated by the programs and there is a certain protocol put in place, to avoid the transaction getting stuck. The normal fee is usually 0.1mbtc unless there are certain conditions that warrants higher fee. the link here explains it very well https://en.bitcoin.it/wiki/Transaction_fees

If you are using electrum, there is an option to adjust the fee but I wouldn't advice you to do that. The program will automatically deny sending of funds if the conditions are not met.

But after having said all that, I just wonder, does additional 10cents fee going to make whole lot of difference?
Probably, transactions are included in blocks based on the the transaction fees, the ones with high transaction fees and priority would be included very fast. If there are two transactions, one with high fees and one with lower fees but have the same priority, the one with higher fee would most likely be included first. It all depends on what the miner's rules are, the miner is free to choose which transaction to include in the block.
7798  Bitcoin / Bitcoin Discussion / Re: Block chain size/storage and slow downloads for new users on: February 07, 2015, 03:59:44 AM
Why bitcoin wallet day to day very slow sync network?

Maybe because of the node. Try to add new nodes:

#0 make sure you actually want bitcoin core [1]
#1 use the torrent [2]
#2 sync with good nodes for the rest, add them with addnode IP add from your bitcoin.conf file [3] or select a single node a use connect=IP

my personal list of nodes:

Code:
last updated 2014.10.10
-------------------------------------------------------------------------------------------------
IP               - location             - owner[1]-  speed      - info/stats page[2] - testnet
-------------------------------------------------------------------------------------------------
84.200.34.113    - Freinsheim, DE, EU   - Newar   - 1000 mbit/s - yes                - no
185.45.192.129   - Amsterdam, NL, EU    - anon    - 1000 mbit/s - /node.php[3]       - yes
213.165.91.169   - Germany, EU          - shorena -  100 mbit/s - yes                - no
50.7.68.180      - New York, USA        - Newar   -  100 mbit/s - yes                - no
5.9.24.81        - Germany, EU          - zvs     -  unknown    - no                 - no
178.79.173.71    - United Kingdom, EU   - zvs     -  unknown    - no                 - no
107.155.104.194  - Dalls, USA           - zvs     -  unknown    - no                 - no
106.185.32.195   - Japan, Asia          - zvs     -  unknown    - no                 - no
94.242.57.173    - Russia, Asia         - zvs     -  unknown    - no                 - no
-------------------------------------------------------------------------------------------------
[1] refers to a bitcointalk.org username or anon if requested
[2] same IP, port 80 or path/port given
[3] work in progress


[1] https://bitcoin.org/en/choose-your-wallet
[2] https://bitcointalk.org/index.php?topic=145386.0
[3] https://en.bitcoin.it/wiki/Running_Bitcoin#Sample_Bitcoin.conf you will have to create the file.

   -MZ
It is also important to choose a node that is the nearest to you. Download and upload speed can decrease if the peer is far from you. If the wallet is syncing slowly, it would be most probably due to the verification of the blocks or you have a slow drive. Every blocks have to be verified individually and read/write and CPU speed is a important factor here.
7799  Economy / Service Discussion / Re: Any good signature campaign for members who dont post much? on: February 07, 2015, 03:57:14 AM
Most signature campaign only accepted Full members and up due to the visibility of the signature, it is pretty hard to find a vacant spot even so. If you can't post alot constructively, go for Bitmixer when you turn to a full member, even with low rates, they have no minimum posts.
7800  Other / Beginners & Help / Re: Best way to start off with Bitcoin mining? on: February 07, 2015, 03:54:46 AM
I also heard that "Pool Mining" is a great option? Is this correct?  Yes solo mining compared to pool is like lotto, use pool mining.
How much does a Antminer S3 441 GH/s make monthly?  Use calculators a lot depends on electricity price
can you use that for lite-coin mining and other crypto currency mining? Other SHA256 coins yes.  But not Scrypt (Most "alts are there").

Pooled mining basically distributes the amount by the amount of work that you have solved. Solo Mining is all about luck unless you have more than 10% of the network hashrate. However, if you do hit the lottery, you would have gotten a hefty reward even though the chances are low. Varience does occur based on the pool you use so don't always rely on calculators, allow a small margin for errors.
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