Questions tagged [blockchain.info]

This tag should be used for questions regarding the service 'blockchain.com'. Blockchain Ltd. is a company that offers a web wallet and provides a blockchain explorer under the domain blockchain.com.

Filter by
Sorted by
Tagged with
3
votes
1answer
754 views

API with reliable address callbacks?

I want my app to be able to create addresses and be notified when an address receives a deposit. What I've tried so far doesn't work reliably enough. I've tried the Coinbase API (address callbacks ...
4
votes
1answer
2k views

How do APIs like Blockchain.info and BlockExplorer work?

When I query an address using either service, are they simply querying the latest block that has been mined? Or do those services have nodes in the network that collect data that has not yet been ...
1
vote
1answer
226 views

blockchain.info: “No operations allowed after connection closed.”

It's not allowing me to see any TX's or addresses. It just says "No operations allowed after connection closed. Connection closed after inability to pick valid new connection during fail-over."
2
votes
2answers
336 views

How does blockchain.info resolve adresses?

I wonder how sites such as blockchain.info resolve the owners of public bitcoin addresses. For example, blockchain.info knows that the xkcd donation address 14FHqYSgA... belongs to xkcd.com. It is ...
1
vote
2answers
2k views

How to query blockchain.info?

I need to query blockchain.info with an address and determine how much is there, ignoring transactions that don't have 3 confirmations. Can anyone give me a hint how to do this?
2
votes
0answers
743 views

Missing transactions with blockchain.info

All of the quick send transfers I've made on blockchain.info do not show up in my blockchain.info history. Furthermore, a person I have made a few quick send transaction with is claiming 0 ...
1
vote
1answer
313 views

Where does bitcoin-qt try to connect to when running for the first time? [duplicate]

My question is, where does bitcoin-qt try to connect to when running for the first time? How does it know where to connect? Is blockchain.info some domain that has discovery services? If yes, then ...
2
votes
1answer
104 views

Is there any risk associated with using the same passphrase on two different wallets both hosted on blockchain.info?

Does blockchain.info use any salt with the passphrase? I.e., is there any risk associated with using the same passphrase on two different wallets both hosted on blockchain.info? edit: of course ...
2
votes
2answers
2k views

Is Google Authenticator really useful on blockchain.info?

blockchain.info hosts encrypted wallets, and all decryption is done locally, so having a Google Authenticator bound to a wallet only prevents an attacker from downloading that encrypted wallet. Now, ...
1
vote
2answers
6k views

Blockchain.info unconfirmed transaction [duplicate]

I'm a newbie and was wondering what to do when there is an unconfirmed transaction on Blockchain.info. Can I reverse the transaction? Will my BTC reach the other side? Or are they lost?
14
votes
7answers
43k views

Dumping private keys from wallet.dat from command line (pywallet.py alternatives)

I have somewhere in my hard disks some copies of old wallets which I need to analyse. My idea was importing them into blockchain.info, but to do that apparently you need to dump them with pywallet.py,...
1
vote
1answer
1k views

How does the blockchain.info shared receive work?

I understand the concept of a mixer and have succesfully used Blockchain.info wallet's shared send feature. The shared receiving address however confuses me. I assumed that one needs to click "new ...
2
votes
1answer
217 views

Is there any party who is archiving all transactions that have been broadcast?

There is a person claiming that Blockchain.info/wallet sent a transaction but for whatever reason that transaction never got included in a block. If the transaction is valid today but perhaps just ...
3
votes
1answer
1k views

Bitcoin wallet/address balance confusion

I'm quite new to bitcoins so apologies if i'm being a noob, but I'm very confused! My bitcoin-qt wallet balance says I have 2.0113406 BTC (which is what I expect). Now if you check my transaction ...
6
votes
2answers
10k views

Please explain network propagation with unconfirmed transactions (blockchain.info)

I am wondering if someone could explain why two transactions have different network propagation values... and what does it even mean considering they are both unconfirmed transactions. Do the ...
3
votes
1answer
1k views

Bought BTC from Blockchain but Received Less Than Expected

Recently, I bought £350 worth of bitcoins back when they where £37 the other day. They've taken over a day to get through to me and when I have received them I only have 7.7 (compared to the 9.1 that ...
13
votes
4answers
479 views

Scenario: disaster splits the Internet into dozens unconnected fragments

Major US cities restore connectivity locally for a couple of days, but the internet islands are separated (or have very poor interconnectivity). Two days later, connectivity is restored resulting in, ...
6
votes
1answer
351 views

Network Propagation over 100%

When looking at transaction details (under summary of recent transactions) on blockchain.info what is Network Propagation, and what does the value greater than 100% mean exactly? For example Network ...
7
votes
2answers
8k views

How does blockchain.info's mixing service work?

Blockchain provides a mixing service. How does it work?
4
votes
2answers
2k views

How does blockchain.info associate a message with an address? [duplicate]

I randomly encountered this address on blockchain.info: https://blockchain.info/address/1CzpppydnGN5dQN7iBnZbmm5RXreu7hrHW and at the top a message appears presumably describing the owner of the ...
3
votes
2answers
4k views

How to make a Bitcoin address your main one in Blockchain.info?

On the Your Wallet starting page of Blockchain.info, there is a frame with the text This is your Bitcoin address *bitcoin address here* Share it with anyone and they can sent you money. (or ...
9
votes
2answers
2k views

Decrypt Blockchain.info wallet export

Blockchain.info's encrypted wallet format is described as: AES encrypting the entire JSON payload with the users password which is then encoded as base64. No salt is used for single pass ...
3
votes
3answers
1k views

Get transaction that spent a transaction id

The blockchain.info API allows for querying information about a particular Transaction by its ID. But if you want to follow the coins to the next transaction, I'm not seeing what the next query should ...
4
votes
2answers
2k views

Why does blockchain.info show a different balance from bitcoin-qt?

I just created a wallet on blockchain.info by importing my wallet.dat from Bitcoin-QT. My Bitcoin-QT shows a balance of 3.991 BTC, while blockchain.info shows a balance of 3.016. Where does the ...
0
votes
1answer
539 views

Are two factor authentication enabled wallets at mtgox or blockchain.info safe even with weak passwords?

Are two factor authentication (2FA) enabled wallets at mtgox/blockchain.info safe even with weak passwords? What are the risks here, except losing one's mobile phone? A Google authenticator is used ...
2
votes
1answer
607 views

My bitcoin-qt client connection status and uptime at http://blockchain.info/connected-nodes does not show reliably - why?

I've been running a Bitcoin-qt client (v0.7.2 beta) on my Mac for over 24 hours, with blockchain fully sync'ed. I checked http://blockchain.info/connected-nodes at various times for my IP address. In ...
2
votes
1answer
260 views

Does a blockchain.info My Wallet have a key pool? [duplicate]

Does a wallet in blockchain.info My Wallet contain a pool of extra keys as in bitcoin-qt? Should the wallet be backed up after every new address is created, or only after several are created?
1
vote
2answers
777 views

Blockchain.info - How to reply to a sender in a callback?

I just started using the Blockchain.info API, I've set it up to notify me when a payment is made, however all addresses in the callback are the destination address. Shouldn't I have the senders ...
3
votes
3answers
2k views

Is blockchain.info storing paper wallet (offline) private keys?

Does anyone know if it is safe to use blockchain.info "Watch Only" addresses? The real question is what happens after I perform a transaction - sending BTCs out of such a wallet. Will blockchain.info ...
8
votes
1answer
3k views

What are Public Notes

I see these "Public Notes" on blockchain.info. What are they? How do they work? Can I make one? Here's a random example: http://blockchain.info/address/1DkyBEKt5S2GDtv7aQw6rQepAvnsRyHoYM Some of the ...
8
votes
2answers
5k views

How can I determine the number of confirmations of a transaction and its fee using the Blockchain.info DATA API?

How can I know if any given transaction has confirmations and has paid the miner's fee, using the BlockChain.info DATA API?
4
votes
1answer
322 views

How does blockchaininfo find out the difficulty?

Do they have a client installed on their servers that pulls the info out of block headers? How does it do it? What's the command?
5
votes
2answers
1k views

Are transaction fees required now? Is there any way to avoid them?

I have been using blockchain.info's my wallet to perform transactions, one of the reason I liked it was because I could choose to not pay a transaction fee. But recently I noticed blockchain.info's ...
3
votes
1answer
2k views

Blockchain.info Receive Payments API problem

I am building a little online app to accept bitcoin payments in my website. I have a blockchain.info wallet and I am following their Receive Payments Api, which can be visited here: http://blockchain....
2
votes
2answers
2k views

Does blockchain.info show all transactions?

My client is still syncing, so I've been checking my transactions on blockchain.info. It only shows two transactions although I know I should have more than that when I search my address. I'm new to ...
5
votes
2answers
3k views

How can I use multisig / split keys using My Wallet?

I was sure that My Wallet supported multisig, but I can't seem to find it now. How can three users of My Wallet create an address that is only spendable if at least two of them cooperate? Or is this ...
8
votes
1answer
1k views

What method does My Wallet use to encode messages in the blockchain?

What kind of protocol does My Wallet use?
5
votes
1answer
202 views

Does blockchain.info backup wallet include also the next addresses

The standard client's wallet includes a key pool of 100 extra pre-generated addresses, which are the next ones to be "generated" when you ask an extra address. Does the blockchain.info's backup ...
13
votes
1answer
3k views

Can I addnode to blockchain.info?

Blockchain.info http://blockchain.info/connected-nodes shows a list of nodes it is connected to. Is it possible for me to add them as a node for connection?
3
votes
1answer
5k views

How to reclaim unclaimed Bitcoins sent via Blockchain.info to Facebook/Email friends?

The FAQ says What happens if the transaction is not claimed? The private key the funds were sent to is saved in the senders archived addresses. The sender can reclaim the amount at anytime by ...
8
votes
1answer
10k views

Extract private keys from Bitcoin Wallet

I have encrypted my bitcoin wallet. I know the passphrase, that's not the issue. I want to transfer my bitcoins to blockchain.info but it's asking me for the private key. I cannot find it nor can I ...
26
votes
11answers
17k views

Is there a blockchain.info for testnet?

I'm trying to test to see if transactions went through or not and blockchain.info is super helpful for this on the real network.
13
votes
1answer
4k views

Is Blockchain.info Open Source?

I know that there is a github public repo, but I'm not seeing a license file. The Android client is GPL3. Anyone know about licensing for the main site's code?
3
votes
0answers
88 views

How to import blockchain.info wallet file? [duplicate]

Possible Duplicate: How to restore locally a MyWallet backup? I have blockchain.info backups, but I never test them. How do I make sure they work? What client should I load them into, and how? ...
11
votes
3answers
6k views

Why does blockchain.info report “Estimated Confirmation time” not as 10 minutes?

Currently, it is a timer which counts down from 10 minutes starting when the transaction is first seen. When the timer reaches 0 minutes, it switches to "Unknown / Never." It is my understanding ...
10
votes
2answers
5k views

Locating transactions by the relayed by IP in blockchain.info

I'm working on some stats and I was wondering if the relayed by IP on Blockchain.info can be used to get an approximate (country level) origin of the transaction. Would it be reasonable to assume that ...
5
votes
2answers
659 views

How exactly does MyWallet's Android client work?

When I create an account via my desktop browser, I am assured that the password only exists on my browser, and is not saved. So, if I "pair" an Android device with MyWallet, can or can't I send BTC ...
3
votes
2answers
354 views

Is support@pi.uk.com the real blockchain.info's support address?

Currently blockchain.info lists that address in the "about us" page, but since the site is behaving erratically, I wonder if it's the real address or a phony one. I.e. if the site was hacked, the ...
4
votes
1answer
188 views

What client-side checks does blockchain's android client do?

Blockchain just came out with a great Android client, based on bitcoin-wallet. In the description it says "No blockchain downlaod [sic.]". However, in the documentation of their sources, they say "...
10
votes
5answers
16k views

How to restore locally a MyWallet backup?

The website blockchain.info has an online wallet system MyWallet which creates backups with a .aes.json extension. While I understand it's a json file encrypted with AES using my passphrase, I'm still ...

1
10 11 12 13
14