Blockchain.info is a service that offers [tag:e-wallets], and allows exploration of the blockchain.

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Escrow outputs show incorrect destination addresses in Blockchain.info

I'm interested in the following multisig transaction 3a0c283c8574205c2cc95cea0e603bfff9087af2ab0360ebd2e98740a3193a18 If I query bitcoind for information about it using the following command ...
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0answers
27 views

How can I fix a low miner fee due to errors?

I made a transaction a while back not thinking at the time give a very low miners fee (1 satoshi) and it's been a while since I sent it and it's still not confirmed and I started looking around. I ...
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1answer
15 views

how to concat our website url in our bit coin transaction in blockchain send api

Hi im using block chain send api in my web application, and it is working fine without any issues. My requirements is when the payment is done thought blockchain send api, is it possible to concat our ...
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1answer
47 views

BlockChain.info Investments? Sounds like a scam

Today I received a strange email, which looks like a scam to me. It claims to be sent from blockchain.info no-reply@blockchain.info, but being a programmer, I know that I can send email from whomever ...
0
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1answer
37 views

what is Create wallet using blockchain api (PHP)

Im wondering to know, what is use of Create wallet programitically Block chain API Block Chain api here What it will provide? Where can i get the api code? Any tutorials ? Can i provide my ...
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2answers
76 views

Is there database of orphaned blocks?

Is there database of orphaned blocks? https://blockchain.info/orphaned-blocks does not work right now Does anybody keep them? Also I am looking for those transactions which were not included in ...
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1answer
39 views

Offline wallet for blockchain.info

With the removal of the feature to import ages.json files to MultiBit in 5.18, are there any other ways to take my backup and access my bitcoins in the event BlockChain.info ever dies? Edit: Just saw ...
2
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1answer
73 views

How can Blockchain.info wallet send unconfirmed bitcoins?

So i just opened a Blockchain.info wallet after years of using Bitcoin-qt. My Blockchain.info wallet had an empty wallet, i sent some bitcoins to it and right after that without waiting for ...
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1answer
55 views

Please walk me through a typical page on blockchain.info

I would tremendously appreciate it if you could walk me through this page. Why are there two addresses on the right? What is the longer hash called that is directly under "Transaction" (not the ...
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1answer
51 views

ELI5: How do I import keys from blockchain.info backup into MultiBit 0.5.18

So, blockchain.info is holding my account hostage. My phone with my 2FA was lost (and remotely wiped) and they refuse to remove the 2FA on my account to get access. I have a recent backup of my keys ...
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59 views

Send Payment with Blockchain Json RPC Api

I'm looking for an example of how to authenticate and send a payment using Blockchains JSON RPC API. Defined Here . A set of curl commands would be quite helpful to get me started. Assume that I do ...
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1answer
77 views

No update on API when receiving payments from other Blockchain.info wallets

I am using the Blockchain.info API for an online shopping website. I have a problem in my Receive API: Payments from other wallets are working fine. Also, payments done by copying the address and ...
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1answer
111 views

blockchain.info api for tor hidden services

I would like to use blockchain.info "recieve payment" api for my hidden service, but would like opinion on the following considerations: Will it be possible to use blockchain.info api for hidden ...
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0answers
57 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: ...
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0answers
44 views

Adding watch-only addresses to Blockchain.info through an API?

I want to set up a service to monitor the activity of various watch-only addresses. I know Blockchain.info offers an option to do URL callback notifications when a payment is made to an address in ...
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2answers
127 views

TorBrowser + HTTPSEverywhere Blockchain.info wallet safe?

I seem to find conflicting information regarding the possibility of a TOR exit node stealing my data even while using HTTPS. How possible/likely is this? Let's assume user implements strong security ...
4
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1answer
85 views

Does anyone have insight into how Coinbase calculates the number of confirmations for a transaction?

When you compare number of confirmations for a transaction by hash using Coinbase vs using Blockchain.info, Coinbase is always ~10 confirmations below Blockchain. Does anyone know why? I'm using the ...
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1answer
56 views

Possible to use BlockChain.info and Bitcoin-QT synced?

I've used both BlockChain.info and Bitcoin-QT. Is it possible to use the same addresses on both? I don't have a incredibly large amount of bitcoins, so I'm not worried about it getting hacked into, ...
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2answers
200 views

How do I use Blockchain.info's Receive Payments API with node JS / Express?

Blockchain has great documentation for PHP, but nothing really for node! Does anyone here have any projects,where they used the blockchain.info Receive Payments API, in their node apps, to receive ...
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38 views

When computing a normalized transaction id, when do I finalize the sha256 hash?

I'm trying to compute the normalized transaction ID so that it matches what is on blockchain.into at the following URL http://blockchain.info/q/hashtontxid/ --- normal TX ID here ---- Given that ...
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1answer
153 views

Does Blockchain.info track IP addresses?

I use Blockchain.info for my wallet, I use a secure anonymous email address. My name and identifying information is never connected with my bitcoin, is it anonymous? How can I keep my bitcoin ...
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1answer
30 views

How to store wallets online?

Something like blockchain.info appears to keep full wallets online. Do they run a standard bitcoind on thousands of servers (one per person)? Or are the somehow managing to keep individual wallets ...
2
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1answer
748 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 ...
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1answer
25 views

Does blockchain.info retain the wallet password in client-side memory?

When you log into blockchain.info - you enter the password on the client side. Does the password remain stored in a local javascript variable on the client side after the login process is over? If ...
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2answers
146 views

Safest method while actually logging in and using blockchain.info wallet

Please help. I have finally set up my cold storage system for but I am too paranoid to login to blockchain.info wallet to send the funds out. Let's assume the account is safe and protected from most ...
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2answers
152 views

Spend BTCs from a paper wallet

So, I want to create a cold storage bitcoin address to store incoming BTCs from donations and payments (I'm a freelance developer so I'm getting used being payed with BTC). Since this address has to ...
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31 views

blockchain.info html5 site

Some time ago I heard directly from someone inside blockchain.info that there would "soon" be an HTML5 version of their site that would be usable from an iPhone (through the browser, not requiring an ...
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2answers
157 views

Is there a database of all transactions?

The blockchain is a database of all valid transactions, but is there a company/project that also logs all transactions which were broadcasted, but didn't made it to the chain? Blockchain.info for ...
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2answers
132 views

Do I need to wait for blockchain to complete to use private key elsewhere?

As the title says: My blockchain sync still needs to sync 56 weeks, but I want to export my private keys from the bitcoin qt wallet to blockchain.info. Is it possible to do that without waiting for ...
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1answer
63 views

Can people associate one blockchain address with another?

I am using blockchain wallet to store some BTCs. Blockchain allows us to create multiple addresses as such: If I give two different addresses in the same account to someone, will he be able to ...
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1answer
430 views

How do I find out the miners fee for my transaction using Blockchain.info API?

Blockchain.info gives you the options of 'frugal', 'normal' and 'generous' for setting miners fees and leave it slightly vague as to what the transaction fee will ultimately be. I want to use their ...
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1answer
213 views

How to use Bitaddress.org and Blockchain.info with Testnet coins?

I was asking myself the same question posed at How to run a bitcoind on a hosting securely? At the above posting, George Pearce provided a good suggestion. However, I have questions but ...
2
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0answers
154 views

is it just me or does blockchain.info json-rpc api return invalid json?

example response for getting a block: {"id":"0","result":{"tx":[1ddd2f103625405389705637ab69603de692a22e86f06428a2... there should be a " after the "tx":[
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1answer
96 views

How to download Bitcoin block headers from Blockchain.info and save to file?

I am just developing and testing Bitcoin mining application in plain Javascript (slow but can be run off-line). To test it to work correctly I need to download Bitcoin block headers from ...
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0answers
75 views

Serious blockchain.info balance bug?

I noticed after sending a small amount from my blockchain.info wallet, the balance suddenly went to zero! I looked at the transaction on blockchain.info and it seemed normal enough, with what should ...
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1answer
102 views

Bitcoin Application [closed]

I'm undertaking a Masters thesis and want to generate a wallet application for mobile devices. I do not need my application to be trustworthy or practical, simply because no-one other than me will ...
2
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2answers
212 views

Why is the transaction fee a multiple of the amount I want to send?

I tried sending 0.0001 BTC from my blockchain.info wallet. It deducted 0.0009 BTC from my account, including a 0.0008 BTC is transaction fee. Is it correct that the transaction fee is 8 times larger ...
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2answers
97 views

Write an android application

What is the best way for me to go about writing a new Bitcoin wallet application? Is piggybacking off API's like blockchain.info or coinbase a good tactic? Would the application then be OK to ...
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1answer
368 views

How to make a block explorer (like blockchain.info)? [duplicate]

I've tried JSON-RPC, but it's very slow. What other things can you recommend?
2
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2answers
2k views

How to avoid Bitcoin-QT's transaction fee or change size limit?

I'm trying to find an easy way to enable my website to accept bitcoin payments. I'm trying to test out Blockchain.info's "receive payment API" (http://blockchain.info/api/api_receive). Near the ...
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1answer
699 views

Easiest way to accept BTC and test

We are building an online game and planning to enable our players to play for bitcoins. Therefore, we need to enable players to deposit and withdraw bitcoins. Which way is the easiest to start ...
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0answers
71 views

From which source blockchain.info got raw data of first coinbase transaction from genesis block

In addition to my previous question: Why I cannot get transaction from genesis block If transaction from genesis block is not stored in the database, from which source I can get it?
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3answers
346 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 ...
2
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2answers
177 views

So I closed my wallet in MultiBit and there isn't a trace of my wallet

I've looked through every file imaginable and I can't find the Wallet I had all my bitcoin in. I'm about to faint, you have no idea how much money I just lost. I'm trying my best not to curse up a ...
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2answers
79 views

Request blockchain for transactions

I have installed bitcoin-qt, so I maintain the blockchain locally. I have a list with transaction hashes strings (i.e f5d8ee39a430901c91a5917b9f2dc19d6d1a0e9cea205b009ca73dd04470b9a6) and I want to ...
2
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2answers
127 views

bitcoin-python API not receiving funds

I've just started toying around with the bitcoind Python wrapper (bitcoin-python) and have run into some issues when trying to move funds around. On the client side, I have generated a new address, ...
1
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1answer
239 views

What is the queue position?

I have an unconfirmed transaction. (As an experiment, I didn't add a transaction fee, and the transaction is taking a lot of time to confirm.) This is some information from blockchain.info regarding ...
3
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1answer
130 views

When using a paper wallet and doing partial spends via blockchain.info. Where does the change go?

I'm pretty shocked that I found out now about the change thing as I read everywhere about paper wallets being secure, but no where does it state that when you spend partial amounts from your paper ...
3
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2answers
201 views

What is the difference between deleting a private key and deleting an address?

On Blockchain.info, when deleting private keys from your wallet, it asks if you want to delete only the private key or if you want to delete bot the private key and the address. If you choose to ...
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1answer
153 views

How does blockchain.info get it's info? Is it via the RPC interface for bitcoind or by reading the raw blockchain directly?

How does blockchain.info get their info? My intuition tells me that they have a modified client that reads and processes the blockchain (either directly from the network as it comes in or from the raw ...