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Questions tagged [blockchain.info]

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

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32
votes
10answers
116k views

How to unstuck a low-fee transaction with blockchain.info?

I've sent a transaction from blockchain.info, but accidentally included too little fee. What can I do to cancel the transaction or speed up the transaction's confirmation? This is a complementary ...
27
votes
2answers
134k views

How do I cancel my blockchain transaction (still unconfirmed)?

I am using blockchain.info. I have made a bitcoin transaction of 22.00883562 BTC to the address 1A9eUAc78tGx65X3CuC9WfSKXXgxjU8ccC. You can see the transaction at https://blockchain.info/tx/...
23
votes
11answers
15k 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.
19
votes
1answer
5k views

How does blockchain.info calculate the “Estimated Transaction Value?”

Consider the following transaction: https://blockchain.info/tx/aa5eb27652bd85dc444ea2508bf0ff6ff1b484141e2d7e69f31976fafb21e06e Each of the output addresses has never before been used, and there is ...
16
votes
3answers
4k views

“Blockchain Explorer” software?

I've been going to blockchain.info frequently to check addresses, transactions, blocks, etc. But since I've already got the blockchain on my hard drive, this seems kind of pointless. Is there any ...
15
votes
3answers
18k views

What is the fastest possible way to download the blockchain?

How to download the blockchain with full bandwidth? How to download the blockchain fast?
14
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?
13
votes
7answers
34k 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,...
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?
13
votes
4answers
465 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, ...
10
votes
3answers
7k views

What are the equations to convert between bits and difficulty?

If we take block hash 0000000000000006770c3806960539ca83a24facbd99ea212f37f2a0e6a5629a for example. The difficulty as a 32 bit float is 50810339.04827648. The difficulty in bits as an unsigned 32 bit ...
10
votes
5answers
11k 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 ...
10
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 ...
9
votes
2answers
4k 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 ...
9
votes
3answers
2k views

Can an unconfirmed transaction that only Blockchain.info shows be manually re-broadcast?

Blockchain.info shows a transaction that was created by Blockchain.info/wallet but for whatever reason the transaction didn't confirm right away and appears to not be getting re-broadcast (perhaps ...
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?
8
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 ...
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
1answer
9k 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 ...
7
votes
4answers
7k views

What does “Unable to decode output address” mean?

On BlockChain.info, I have noticed a few transactions which send money to "Unable to decode output address". For example, here is one: https://blockchain.info/tx/...
7
votes
3answers
2k views

Transaction with Multiple Inputs having Same Address

Why do transactions have multiple inputs with the same address? Is it because the amounts were obtained in the address through multiple separate transactions. Shouldn't the amounts be clubbed to a ...
7
votes
4answers
25k views

Get BCH from blockchain.info after fork

I had a fraction of BTC on blockchain.info before the 1st of August and I didn't touch them at all afterwards. I never got my private keys (nor the 12 words) from my blockchain.info wallet (or if I ...
7
votes
2answers
4k 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?
7
votes
1answer
77k views

How to track bitcoin transaction?

I have sent 0.00778963 BTC to 1BF8SHKnT8ZysYNrj5toeu6DsuGE5XDcCR It is more than a day and I dont see it in the wallet. The receiving address is a coinbase account wallet. Please let me know how I ...
7
votes
1answer
7k views

In case of the Bitcoin split - when holding BTC on blockchain.info - will I receive coins on both forks?

Everyone says: If you do not hold private key to your BTC, you do not own BTC. Technically speaking I do not hold the private key, but I do have the 12 words backup phrase. I would like to know ...
7
votes
2answers
5k views

How to solve Blockchain 20 address gap-limit problem?

We currently offer Bitcoin withdrawals and deposits on our website. Blockchain API is used to handle all operations. Only problem is Blockchain Receive API's 20 address gap limit, as mentioned here: ...
7
votes
2answers
7k views

Hacked my blockchain.info wallet, stole 760 coins

Two days ago my wallet at blockchain.info was hacked, everything was taken (760 coins). https://blockchain.info/tx/0619d221a761a3b8ec205773440fa6607d65957ef985dac5fb5273a08bda2c89 Besides the ...
7
votes
2answers
8k views

How does blockchain.info's mixing service work?

Blockchain provides a mixing service. How does it work?
7
votes
0answers
27k views

Blockchain - How can I cancel my blockchain transaction, unconfirmed after +1 day [duplicate]

I am using blockchain.info. I have made a bitcoin transaction of 4.79 BTC to the address 1DWaEfPbcKQvjMi9D9eNMrVRQzWiSLVvaS. (exchanger) You can see the transaction at https://blockchain.info/tx/...
6
votes
3answers
3k views

the only iPhone wallet app offers NO WAY to include a transaction fee?

I recently sent some bitcoin to a friend using the blockchain.info iPhone app and it sent it with 0 transaction fees. As a result it caused an awkward situation as my friend was watching block after ...
6
votes
6answers
16k views

Generating a Bitcoin Address QR code with current USD price embedded?

I'm creating a Bitcoin QR link with my website, but I want to be able to just link to a page that generates the QR code with the current USD price equivalent of BTC in the QR. I tried blockchain.info, ...
6
votes
2answers
628 views

Can I find out on which website I got my Litoshi address?

I can't remember where I got my Litoshi address. Is there a way I can find it because boxlit transferred my litoshis already? I saw the transaction through block.io. I don't think I got it there (...
6
votes
1answer
1k views

Shared Coin in BlockChain new wallet?

How can I send Shared Coins using BlockChain new wallet?! I can't find that option in the new wallet!
6
votes
1answer
2k views

How block explorer technology works?

If you click on random wallet at block explorer you get an instant info of all the transactions, balance etc etc. My question is, how their technology works exactly? Do they transform blk????.dat ...
6
votes
1answer
4k views

What does the “Cost per Transaction” chart on BlockChain.info show?

According to the Blockchain.info: Cost per Transaction, the latest "Cost per Transaction" value is 16 USD. Apparently, it's not the transaction fee, what does it mean then?
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 ...
6
votes
1answer
193 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 ...
6
votes
1answer
129 views

Custom receive payments method?

So it's a known problem that blockchain.info's api only allows a gap of 20 unpaid addresses, which sucks and makes their api almost completely worthless. But I was thinking how could I make my own ...
6
votes
1answer
2k views

publicly available json-rpc node for bitcoin-cli connection

There is a service provided by blockchain.info described on json_rpc_api page. More or less it describes the API that user can use to access their blockchain similar way as using bitcoin-cli to own ...
6
votes
1answer
346 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 ...
5
votes
2answers
1k views

Can a clever hacker still steal everyone's money from the blockchain.info wallet?

Blockchain.info claims: We cannot (and don't want to): View your balance View your address book Make transactions on your behalf Confiscate your wallet Lock you into our service. ...
5
votes
3answers
2k views

Where does the change go in blockchain.info when using a paper wallet?

When using a paper wallet as watch only via block chain.info and you send partial amounts out from it. Where does the change go? I've read you can lose all your coins if the client doesn't handle ...
5
votes
2answers
8k views

How can I brute force decrypt my blockchain wallet?

I have a Blockchain wallet but am unable to decrypt my wallet and login. I created the wallet on OSX and am trying to login on a PC but it's not working. What are my options to brute force this ...
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 ...
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 ...
5
votes
1answer
193 views

Blockchain Application

I am currently doing a project that requires blockchain to be applied to other systems. I was wondering where I can easily download the blockchain database and which is the best way of understanding ...
5
votes
1answer
1k views

How to get value of incoming transactions from Blockchain.info API

I'm looking at the blockchain.info API and I'm having a difficult time finding the value of incoming transactions. That and the number of incoming transactions are the only things I'm interested in. ...
5
votes
2answers
653 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 ...
5
votes
2answers
713 views

Remove address sub from blockchain websocket API

According to the docs, Blockchain.info provides a websocket API that streams a few things: All unconfirmed transactions using "op: unconfirmed_sub" New blocks & the data they contain using "op: ...
5
votes
4answers
1k views

How does the Bitcoin payment forwarding at Blockchain.info work?

We have been using the payment service provided by blockchain.info https://blockchain.info/api/api_receive It allows us to generate a unique address for each payment and forward Bitcoins received by ...