Blockchain.info - Bitcoin Block explorer & Currency Statistics

[Graet]

Blockchain.info is Bitcoin's most popular bitcoin wallet and block explorer.

how about making http://blockchain.info/pools accurate - too many people look at it and get scared - there is even a stickie in the mining subforum https://bitcointalk.org/index.php?topic=123726.0 since November last year
https://bitcointalk.org/index.php?topic=77000.msg3207708#msg3207708 has a list of coinbase signatures to make it easier
kinlo can do it - I am sure you guys are capable if you were to put the effort in see: http://blockorigin.pfoe.be/chart.php
thanks

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[piuk]

I it's got notified of two malicious login attempts. One in Germany one in USA.

I would recommend you change your wallet alias. If anyone visits http://blockchain.info/wallet/YourUsername you will receive an "Authorization Required." email, this isn't really a problem but using an alias which isn't the same as your username on bitcointalk or other bitcoin sites will prevent anyone from easily accessing your wallet login page and you will stop receiving the malicious login attempt emails.

Ideally note down your wallet identifier and don't use an alias at all.

[minimalB]

Please let users decide if they want that kind of security. Please make ON/OFF switch for this "authorization" and keep it ON by default.

I have a pocket change wallet and it makes me sick when i'd like to show it to someone and i have to do all the extra work (opening email, clicking on link, etc etc). It's annoying. It's super cool to have that kind of security available... but in some cases, it would be great if we could turn it off for ease of use on multiple computers. Thanks.

[Puppet]

I it's got notified of two malicious login attempts. One in Germany one in USA.

I would recommend you change your wallet alias. If anyone visits http://blockchain.info/wallet/YourUsername you will receive an "Authorization Required." email, this isn't really a problem but using an alias which isn't the same as your username on bitcointalk or other bitcoin sites will prevent anyone from easily accessing your wallet login page and you will stop receiving the malicious login attempt emails.

Ideally note down your wallet identifier and don't use an alias at all.

I got such an email too, originating from a tor exit node:
Time: 2013-09-24 08:53:37
IP Address: 162.213.223.139
User Agent: Python-urllib/2.7

Here is the thing; I dont have an alias, or not that I know off.

Im not overly worried since I use blockchain only for viewing (no private keys for anything with btcs) but Im curious.

[miffman]

How can I change my wallet's language? I can't without going through the homepage everytime, and that doesn't always work.

[cc]

Hi,

Blockchain Wallet API gives back Unknown Error recently if I try to send with hex encoded private key:

Code:

https://blockchain.info/merchant/4E533581DF08E14AC890C861F79F35F44CE7001289C6DAB1DC98FCF93E6329D5/payment?to=1EgUYuEwPoZXgniNA66Hq8Y4Q6uCEyvXH&amount=1

Response:

Code:

{"error":"Unknown Error"}

[piuk]

Please let users decide if they want that kind of security. Please make ON/OFF switch for this "authorization" and keep it ON by default.

The problem is 90% of users will not read warnings and will simply choose the easiest option. It's like when you give users the option to not pay transaction fees, the majority of them will, only to complain about transaction being slow to confirm soon after.

I have a pocket change wallet and it makes me sick when i'd like to show it to someone and i have to do all the extra work (opening email, clicking on link, etc etc)

This should be easier now. Links in approval emails will now whitelist the browser that made the request even if the approval email is opened on a different device.

For example: If you want to open your wallet on a friend's PC you can use your alias and open the approval email on your phone.

---

In a related change, aliases will no longer work on wallets with no email associated. Anyone receiving the following error "Insecure Alias. Please login using your wallet identifier link." needs to use their identifier to login and once logged in add an email to the account. Contact Support (Not me) if you have forgotten your identifier.

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Support for an increased number of pbkdf2 iterations

An custom number of pbkdf2 rounds can now be choosen in [Account Settings] -> [Debugging]



Enabling this feature alters the wallet format slightly making it none compatible with old clients. The following clients support the new format

Chrome Extension v3.0.1
Firefox Extension v1.9.1
Mac OSX App v0.3 (Not available in app store yet)
Android App v3.61

The iPhone app and third party Windows 8 apps do not support the new format and will cease to function if the pbkdf2 rounds are altered. Once the remaining clients are updated the new default will be 10,000 iterations and all existing wallets will be upgraded.

Depending on the speed of your device and the number of rounds a progress bar may now be displayed on login.



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How can I change my wallet's language? I can't without going through the homepage everytime, and that doesn't always work.

Account Settings

Blockchain Wallet API gives back Unknown Error recently if I try to send with hex encoded private key

Should be fixed now.

[truy]

Noticed the update to v1.98 but unfortunately the addon is still not working under linux firefox.
The icon is appearing now, but clicking on it does nothing.

Opening the url (resource://jid0-3vnsclfrwladqlsm1xgb50oxar0-at-jetpack/blockchain/data/en.html) manually does open the site but freeze at "Changing Wallet Identifier".

So it doesn't work for me under linux. Any others with that problem?
Under win7 I doesn't have these issues.

Can you have a look at this issue with the firefox extension, piuk?
At the moment it's unavailable at AMO too and the github version is outdated.

https://addons.mozilla.org/en-US/firefox/addon/my-wallet/
"We're sorry, but we can't find what you're looking for."

I am wondering if the extension is still maintained and secure to use.

[asoltys]

Hi piuk, apologies if this has been asked before but how is the blockchain.info websocket API implemented and is it open sourced somewhere?  If not, would you consider open sourcing it?  I'd like to host my own version of it.

Thanks,
Adam

[HostFat]

Since you (piuk) are considered as a reliable person, are you thinking to become also a gateway for the Ripple network?
Users will need to move their Bitcoin to temporary btc addresses owned by you (blockchain.info), and then you will move IOU BTC to the Ripple addresses of users.

[VTC]

Chrome Blockchain App updated to 3.0.2.  Can we get a list of changes made?

[piuk]

https://addons.mozilla.org/en-US/firefox/addon/my-wallet/
"We're sorry, but we can't find what you're looking for."

I am wondering if the extension is still maintained and secure to use.

It is still being maintained. The not found error is a bug in the extension gallery. Unfortunately it will take mozilla 2-4 weeks to review the update before it will be available again.

The latest xpi is available here: https://github.com/blockchain/My-Wallet-Firefox-Extension/blob/master/blockchain.xpi

Hi piuk, apologies if this has been asked before but how is the blockchain.info websocket API implemented and is it open sourced somewhere?  If not, would you consider open sourcing it?  I'd like to host my own version of it.

It currently not open source. You could use Bitcoinj and tomcat (with built in websocket support) to create your own version.

Since you (piuk) are considered as a reliable person, are you thinking to become also a gateway for the Ripple network?
Users will need to move their Bitcoin to temporary btc addresses owned by you (blockchain.info), and then you will move IOU BTC to the Ripple addresses of users.

I believe the plan for the moment is to be exclusively Bitcoin, this could certainly change in future.

Chrome Blockchain App updated to 3.0.2.  Can we get a list of changes made?

It incorporates changes from this commit: https://github.com/blockchain/My-Wallet/commit/d68a836399c7570789d4abb3d4232c5a86bb9734

No end user changes.

- Added Filersaver.js for better cross browser support when downloading wallet backups client side.
- For authentication rather than the sharedKey being passed in full each request it is now hashed using a TOTP scheme, that way if it was intercepted for any reason (no SSL) it is valid for only a few seconds. As a side effect the javascript client now syncs with server time when the wallet is opened.

[cypherdoc]

i'm not able to look up address balances.

[mutex]

I don't seem to be getting notifications when newly minted coins are transferred to one of my addresses, works fine for normal transactions.

[ingrownpocket]

Code:

java.security.cert.CertificateException: No subject alternative DNS name matching coinad.com found.

Was working fine this morning, and now this.

[scribe]

Hi Piuk, any word on these two bits on the Android app from a while ago? The first bit me again the other day.

Annoying niggle in the Android app - clicking the transaction has in the transaction popup sends you to an address with https:/ instead of https:// - which for me defaults to a Google search instead.

(snip)

Lastly, I used to be able to add a label to an address by choosing the transaction - is this still possible? I get the impression the "add note" button adds a public note instead?

Cheers.

[piuk]

i'm not able to look up address balances.

Any error message?

I don't seem to be getting notifications when newly minted coins are transferred to one of my addresses, works fine for normal transactions.

I'll look into this. Coinbase transactions are handled differently than regular transactions so there could be an issue.

Was working fine this morning, and now this.

Should have been fixed last night.

Annoying niggle in the Android app - clicking the transaction has in the transaction popup sends you to an address with https:/ instead of https:// - which for me defaults to a Google search instead.

I'm not able to replicate this, what version of the app are you using?

Lastly, I used to be able to add a label to an address by choosing the transaction - is this still possible? I get the impression the "add note" button adds a public note instead?

It adds a private note to the transaction (stored client side). The only way to add an address label at the moment is to copy the address to clipboard, open the address book, swipe to "sending addresses" and choose "paste sending address". The other way was much easier, I'll look at adding it back in.

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New Chrome Extension

A new version of the chrome browser extension is available here. Due to a change in the way it is packaged it must be submitted as a new extension so existing users will not get automatically upgraded. It now launches in a dedicated window and has improved multi language support. The new packaging also allows access to the chrome usb interface which can be used to support hardware wallets like trezor.

[sunnankar]

Due to a change in the way it is packaged it must be submitted as a new extension so existing users will not get automatically upgraded.

On one of my computers, a MacBook Air 10.8.5 with Chromium Version 22.0.1215.0 (147829) I get this error:

This application is not supported on this computer. Installation has been disabled.

[julz]

My blockchain.info transaction history only goes back to late September

There only seem to be 10 pages of transactions   - but I have *many* more transactions which I now can't view.  I didn't realize before that old transactions were dropping out of view.
Is there some way to access them, or do I have to pull a list of all my addresses and somehow generate it from the blockchain itself?

edit: oh.. I found them when I used the 'export' to csv facility.  It's not so convenient (especially as you can't search on addresses - only tx IDs) - but at least they're there.

Maybe this is an opportunity for further monetization of the site. I do a few transactions every day, and only have about 1100 over the past 18 months - but I expect a busy trader/merchant would have many more. I expect some may be willing to pay a small yearly donation/fee for a better transaction interface - especially if there were some way to store private notes in the system.
The android app seems to allow private notes - but it's not very useful because there the transaction history is even shorter, and they soon just disappear into the ether.

[piuk]

On one of my computers, a MacBook Air 10.8.5 with Chromium Version 22.0.1215.0 (147829) I get this error:

This application is not supported on this computer. Installation has been disabled.

Are you able to update chromium? In not sure what the minimum required version is but the latest is 30.0.1599.69.

Is there some way to access them, or do I have to pull a list of all my addresses and somehow generate it from the blockchain itself?

I've improved the pagination controls in the web interface now, you should be able to navigate to the last page easier. The android app still only displays one page at the moment.

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Change to API request limits.

The API request limits have been doubled to a maximum burst of 2 requests per second over a 5 minute interval and 1 request per second over an hourly interval.