Need help with Bitcoin

[phou2015]

I have bitcoin address but it does not have private key. So can you tell me how to generate private key from existing bitcoin address?

[Sharma]

It depends on your wallet , if you are using coinbase or an address from exchange then it's impossible to generate private key. If you are using blockchain or bitcoin core then your private keys are in your own control.

[RappelzReborn]

I have bitcoin address but it does not have private key. So can you tell me how to generate private key from existing bitcoin address?

That's simply impossible mate , if we could that then everyone can steal anyone else Bitcoins . Now unless you are using Offline wallets like Electrum , Bitcoin Core , Multibit I don't think you will have access to your Private keys .

[phou2015]

so how can I withdraw my bitcoin from that watch only address?

[RappelzReborn]

show how can I withdraw my bitcoin from that watch only address?

If you are using Blockchain.info (you still didn't tell us what wallet you are using) then this is your answer :


What does "Watch Only" mean?

"Bitcoin addresses come in two parts - a public key and a private key. The public key can be used to view an address’s balance and transactions, but it cannot be used to make transactions without the private key. The private key is the important part which proves ownership of an account and allows Bitcoins to be spent.
When addresses are labeled with “no private key”, it means the private key is not contained in your My Wallet data. You must have a backup of this key elsewhere (e.g. paper wallet) in order to make transactions."

Source : https://blockchain.info/wallet/technical-faq

[defcon23]

show how can I withdraw my bitcoin from that watch only address?

you can't from a "watch only wallet".

[Sharma]

show how can I withdraw my bitcoin from that watch only address?

If i am not wrong, it means you have imported an address to your wallet ( most likely blockchain ) without its private key, so you can't spend any btc in that address, only person who has the private key can spend it.

[phou2015]

oh, my god! It is mine not other but I forget whether I already generate private key or not? So how about my money in that address?

this is my bitcoin address : https://blockchain.info/address/1HZgwYXr7cKLqp9UYK1MGTeJGUS6U5juVc

[defcon23]

anyway  it's only     0.0081644 BTC    you dont have lost a lot man

[phou2015]

oh my god...it is so hard for me to get such amount of money. So there is no way to generate private key?

and this is another link from blockexplorer : http://blockexplorer.com/address/1HZgwYXr7cKLqp9UYK1MGTeJGUS6U5juVc

[Sharma]

oh, my god! It is mine not other but I forget whether I already generate private key or not? So how about my money in that address?

this is my bitcoin address : https://blockchain.info/address/1HZgwYXr7cKLqp9UYK1MGTeJGUS6U5juVc

Without private key , it will stay forever in that address.
Can you elaborate more ?, how can you get that address and what wallet are you using ?

[phou2015]

Ok, so I delete it now. Thanks for your ideas mates. 

[phou2015]

Now I create new address in blockchain. when I send money to others does it need private key? and if it need where can I get private key?

[RappelzReborn]

Now I create new address in blockchain. when I send money to others does it need private key? and if it need where can I get private key?

You still didn't tell us what wallet you are using and we are asking since two years now , anyway I'd assume blockchain.info so ... If you created another account then by default you should be able to spend and receive money without any issues . (unless they changed something on the website) because it's been sometime I didn't use it .

And if you want your private keys to use them later on another wallet or whatever then here you go : https://blockchain.info/wallet/backups (all what you need , from Paper wallet to Unencrypted ones)

[trinaldao]

oh, my god! It is mine not other but I forget whether I already generate private key or not? So how about my money in that address?

this is my bitcoin address : https://blockchain.info/address/1HZgwYXr7cKLqp9UYK1MGTeJGUS6U5juVc

any why where you get your addres ?
are you use blockchain or you use another exchanger like bittrex or Bitsamp ?

[phou2015]

I use blockchain to create new address...and I did not see any private key with the new address. And if I can send money from new address in blockchain without private key it is great but I am afraid that when I use the new address to send money it is required to put private key again.

[Muhammed Zakir]

I use blockchain to create new address...and I did not see any private key with the new address. And if I can send money from new address in blockchain without private key it is great but I am afraid that when I use the new address to send money it is required to put private key again.

Blockchain.info is getting wierd and very buggy. I highly recommend you to start using desktop wallets(https://bitcoin.org/en/choose-your-wallet) or if really want to use an online wallet, then use GreenAddress.

[hexafraction]

I use blockchain to create new address...and I did not see any private key with the new address. And if I can send money from new address in blockchain without private key it is great but I am afraid that when I use the new address to send money it is required to put private key again.

I don't think you're getting the point of this. It is impossible for ANYONE to send ANY money without the private key. If you are able to send from Blockchain, it means that your Blockchain wallet DOES have the private keys, and you simply don't know where to look for them.

Frst, make sure that nobody is looking over your shounder or recording your screen with a camera.

Click Import/Export, and select the "export unencrypted" option. In the dropdown, select the "Bitcoin-QT format" option, as it is accepted by most wallets. You will see a text area with lines such as:

Code:

{"addr":"1XXXXXXXXXXXXXXXXXXXXXx","priv":"5J4XXXXXXXXXXXXXX","created_time":0,"created_device_version":"0","tag":2,"created_device_name":"external"}

The 5J4XXXXXXXXXXXXXX part is the private key for that address. Keep it safe.

Unrelatedly, "Need help with Bitcoin" is a extremely vague title for a thread in "Technical support" of a Bitcoin forum. Use a more descriptive title next time.

[ingiltere]

First of all if you have a bitcoin address then you already have it's private key. You (or computers create on behalf of you) need to create the private key first, then this priv key is converted into a public key (your bitcoin address).

If you say where did you get this address then we can help you to transfer your funds etc.


Also As I've seen you "hard earned" that money from faucets. Before making any business transaction you need to combine those inputs into one in 1 tx. If you're using Bitcoin Core, then it's quite easy. (I mean of course you can send it with a really high fee but there's a cheaper way).

1- Enable coin control
2- Select all inputs
3- choose the fee option as "1kb = 1000 satoshis".
4- then send them into a new address of yours. (It'll take some time (between 1 hour to six hours) but it'll be confirmed)...

[achow101]

Also As I've seen you "hard earned" that money from faucets. Before making any business transaction you need to combine those inputs into one in 1 tx. If you're using Bitcoin Core, then it's quite easy. (I mean of course you can send it with a really high fee but there's a cheaper way).

You don't need to combine all of those inputs, and it may not be cheaper to do so. It certainly won't be more expensive. It is just as expensive in fees to send all of those inputs in one transaction to yourself as it is to send them all to someone else for payment. In fact, it could be more expensive (slightly) to send them to yourself because you must create 2 transactions, one to yourself and then one to pay other people, instead of one transaction which will both send change to yourself and your payment to other people.