Bitcoin Forum

Introducing Goochain, the first search engine for the Bitcoin blockchain.
It brings new unrivaled features in the Bitcoin web service space.



goochain.net (https://www.goochain.net)


https://www.goochain.net/Site_may15.png

Provides links from various inputs: search field can be hash, address, time and/or amount.
Can retrieve transactions from blockchain in a pioneering new way, all in real-time.
Gives basic info and print out links to have further info.


More specifically:

• From address "base58chk",  hash160 : gives basic info
• From an adress list (comma separated): gives balance and sum
  
• From starting characters (firstbits) of an address : find matching full addresses
• From HD Wallet extended public key (xpub BIP32) : lists all used addresses and balance
• From block hash or index : gives basic info
• From address and time frame : lists all matching transactions
• From address and a given amount  : lists all matching transactions
• From block and a given amount  : lists all matching transactions
• From a transaction ID : gives basic info
• From a given amount and a time frame (blank search) : lists all matching transactions in the blockchain

For all results, a link is provided to get full info.
"Given amount" can be equal or min/max. "time-frame" can be a time windows or a date (day).
Timeframe and amount range search can be used concurrently for a given address.


Check out a slide presentation Here (https://docs.google.com/presentation/embed?id=1XVSvmlMUyvxKRqgo7q6yccS8rFU27zDbo5H6ZSLua-k&start=false&loop=false&) !


When the found items are transactions, a list is displayed and can be sorted by date or amount.

This is not a full info site, but a search engine for the blockchain. It gives links to external sites, then you can find all info on these sites. Info given are basic, but you have further info when following links. External service (links) is selectable, and automatically saved after each search.

Everything is done on the server: no external API, Bitcoin node running locally.


Use cases:

• You want to quickly check the amount of an address
• Check the amount in your Trezor wallet (from xpub code provided)
• You have a paper/cold wallet : just type the 5 or 6 starting characters of the public address
• You know by heart the beginning of a Bitcoin address ("vanity" generated)
• You can list all transactions made during a month with your address
• Search "spam" transactions of a given address (min=0, max=0.01)
• You just remember the day of a particular transaction with your address
• You want to filter transactions related to a service bought (by amount and/or date)
• Can help during dispute or investigation with searching a transaction of an known amount in the blockchain during a time-frame.
  

Now detects and displays ProofOfExistence blockchain notary service.

Is it really like Google? If it is free, users are the products, I must be tracked down?
No, this is free because it is ran by enthusiastic people in Bitcoin. Running the service doesn't cost so much money for now.
No identification cookie, no ad, no external and intrusive tracker. The only thing it does is searching your requests and printing out back the result. HTTPS is enabled and default so no info is shared on the Internet and requests are anonymous and private.

If you like the service and/or want to support the service, you can give a tip to this address:
1GooCHAumrSdDxndoAwDg5pSSMp4hVY4wA
(address changed for multisig)


Known Limitations

• Print out only 4000 transactions in case too many results
• Print out only 100 addresses in case too many matching
• 24h searching range when data and amount through full blockchain
• Provides transaction by Sum of TxOUT (also fee)

Known issues

• Some searches can be too long and it indefinitely prints out "Searching Please Wait"

Future improvements/functionalities

• Provide more info and sorting options in transaction list
• Improve amount range and date input
• Search by address amount (on most valuable address)
• Graph of address amount vs time
• Print out block list when searching in a time frame
• Search a message written in blockchain (OP_RETURN or "unspendable scriptPubKeys")
• Amount would be USD also

Imagined and created by @a_ferron
BackEnd Optimizations by @MarsuTwitt


You need support?
    Post your issue here
or Write to service@goochain.net
or Use twitter account @goochain (https://twitter.com/goochain)


Thanks for your feedback! ;)

Really awesome stuff! Good job!  ;D

Will be using for sure.

Anti-spam feature sounds great

 - Bookmarked -

By the way, thanks for the first tip. :)

Not a single tip to GooChain address will be cash out before Jan 1st 2015.

What a great project! I've bookmarked it too :)

The name sounds good. Goochain, i like that name.

Your project will be a good success for sure.

GooChain can now accept input from RIPEMD160 hash for addresses.


Yes, this is what I mean when writing as a future improvement:
As every other feature, I have to assess if this would not use so much resources (request answer from server in an "acceptable" time).

I don't know why but my balance is incorrect. I tried 3 explorers, the explorers shows correct balance but Goochain is showing more than that, though there is no problem with no. of transactions. My address is 1MzakiRDem5MCocbcP7DgfcVGZNZe2KqaC . Please check it!

   ~~MZ~~

Thanks for reporting that. I've already noticed some differences with cumulative in/output on an address.
I though it was because of managing "transacted", but issues can be linked. Insight is reporting same amount as GooChain.
Can you share transactions list and amount from your client ?

I will perform some major changes on some main blocks of the system, service will be disrupted. It might last some hours.
It won't fix this issue, but that would help for my investigation.

Fortunately, I managed to fix this issue. But I had to reindex all database, hence the long disruption (on top of overnight, I need sleep)

Goochain is now back on line.  :)

I can't access it. Any problem? It seems Goochain(1,2&3) are down.

  ~~MZ~~

No problem from my side, server ok, acces from multiple ip/fai ok. Please double check from your side.

New feature: find full address from starting characters.

Gives results if beginning given is unique among addresses that have more than 0.02 BTC.

"1Good" , "1BETaJU", "1BTCs", "1GooCh",...

In the following days, I will improve search from beginning of address : it will list all matching addresses, as a real search engine.   :P

New unrivalled feature : One can search now with starting sequence of an address (at least 4 chars) and it lists all matching addresses (balance > 0.02 BTC).

GooChain is one step closer to be the ultimate BTC search engine.  :D

I like it! Big project by the looks of it

Tested ok with a funded address but failed with firstbits.
Very interesting service anyway although any blockexplor could possibly offer the same.
The search algorithm can make a difference but It's not obvious to me at this point.

Thanks for trying out!

The difference is more about searching options that are advanced. For example one can search all transactions during a time-frame with his own address.

Can you give more details about your personal issue on firstbits? Normally, every addresses with more 0.02 BTC and not HD are listed. "Disposable" addresses as in HD wallet may be found but no guarantee.
Also this requires at least 4 chars, including "1". "1Bat", "1abc", "1Goo" would work like "1star", "1Bitcoin", and so on...

I will update main post to reflect that.

My bad, I just realized that the address I tried for the firstbits test had been emptied out.
Firstbits work indeed perfectly on goochain with funded addresses.

Great resource! Thanks a lot!

Small Update :

• Major speed improvement for "Block + Amount" and "Date + Amount" searches
• Press zone added

Thanks! Can you add www.blocktrail.com ? It is a nice one. Thanks in advance! :)

   ~~MZ~~

Added 3 block-explorer services for external links in choice list :

• BlockTrail
• My Chain
• CoinBin

 :D

Thanks!

Really bad, couldn't find your BTC address in the post. ;) PM me. ;D

   ~~MZ~~

Good job, my congrats! :)

Can't find this address "1Maxime7WnLqq24hasMA872JZ4VBGMDbKk" by first bits "1Maxime".

Thanks for using the service Maxime. Still, I'm really sorry but your address is, for now, not "eligible" to work with first bits, since it has around 0.012 BTC. The minimum is 0.02.

As stated in Support page :
"Find address from First Bits (4 starting chars) only if address has at least 0.02 BTC. Disposable address (part of HD wallet) may not be found out."
For the sake of search time speed, I consider addresses enclosing less than 10$ are not relevant.

To use GooChain with your address, you need either to enter the full address or put more than 0.02 BTC on it.
When you add fund on it, you may wait some hours to found it from first bits, as this search capability is not real time. First bits database cache is refreshed several times a day only.

These amount and update frequency limitations would be mitigated in the future developments.

You can find on main post the tip address: 1GooChA5ScVdBx3kXktQnULBdm9s1seAcj

Video presentation of the GooChain service
at La Maison du Bitcoin, Paris, France

VIDEO with English sub-titles Here (https://www.youtube.com/embed/703j0H9fJ58?cc_load_policy=1)

Enjoy!

New little feature but very useful : now saves the selected block-explorer.  :)
This is saved at each search, automatically in your web-browser (in a basic cookie).
Take care to access to the exact same domain (www/org/net/..) to get the saved value, each time you connect.

Thanks for taking the time to read! :) But... a parameter was better(if it can be done) because cookies will be cleared anytime.

   ~~MZ~~

Well, this is still a parameter. Now, it is saved automatically in your browser.
If you don't delete cookie manually, it won't be cleared. In case of clearance, you just need to setup again the parameter.

Then, how would you like to save permanently this parameter? I would need to ask for a login and authenticate every single user who needs to save their configuration, meaning each time, you need to login. Eventually, you can save the account in your browser like "remember me", but this is done by cookies also, so if you erase cookies, you need to re-login. I consider a login is much more complex, embarrassing and longer for the user. Do you think selecting the block-explorer again (in case of lost or new browser) is harder than logging to your account?
Also this raises privacy/anonymous concerns, as it means every logged user could be identified when they perform searches. And the idea to have a user database in my server is not enjoying me so much.

Maybe you thought of other method to save the parameter, I'm attentive to any proposal. Generally speaking, there's no perfect ways of achieving something. I just choose one, and I'm listening to any feedback and improvements ideas.

Thanks for the brief explanation. I think something like goocha.in?explorer=BT for Block Trail and BC for BlockChain and so on. With it, there will be no need of an account, I think. I am poor at these things, so I might be suggesting what can't be done, if it is I am sorry.

It is easy to just select from the list if the cookies are cleared. I suggested just to make this better. :)

   ~~MZ~~

Any idea is good to know. Your idea could be easy to implement. I understand this would let you easily bookmarked the url containing blockexplorer choice, so no need of cookie keeping.
Still, we did an other way, and we are not about to implement your idea in the immediate future. But we definitively keep it in our mind.  :D

Lot of updates for this project:

New capabilities
- HTTPS enabled and default (end-to-end "Full SSL", A grade)
- HD Wallet (BIP32 / 44) support:
  Input extended public key ("xpub...") and gives out all used addresses and sum of balances

Improvements
- Listing improvements:
  Tx list refined
  Number of txs added in addresses list
- No more output in scientific notation for small amounts

Bug Fixes
- Bug fixed : some hash160 didn't work
- Date of Tx not in blockchain displayed properly
- Bug fixed in amount sorting

Others
- New twitter account @goochain

Excellent project!
and have more features and updates :D
tested ok with my address and other address.

Hi,

Searching for xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189 oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz does not yield any results.
Comprare blockchain.info: https://blockchain.info/xpub/xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz

Any idea, is HD wallet support broken? You say it allows BIP32 HD lookups, does this include BIP44 HD wallets yet? (I'm not sure but the address above could be a BIP44 wallet.)

Cheers
vertoe

Dear Vertoe,

As stated to you on PM, we cannot find, for now, any problem from our server, everything is working well.
Our service should work with BIP32, BIP39 and BIP44, since derivation is (?) the same.
Still, BlockChain is sending back your transactions and not Goochain. Sadly, BlockChain doesn't seem to provide any details about their "xpub" capabilities. They may compute also "old" derivation method.

We have tested our "HD" entries with BIP32 and BIP44 wallets. Our "full in-house" BIP32 implementation pass all non-hardened tests vectors listed in the standard. It can work with BIP32 HD wallet and it works with Ledger Wallet and Mycelium (BIP39+44 : xpub from "44'/0'/0'/0" path). We might have missed some cases, there is a catch somewhere around CDK. This would be worthwhile to dig it further, as it would definitively improve GooChain service.

We have open internally an issue ticket for this problem. Thanks for this report. We're waiting for your answers on PM to have further details.

Maybe some "forumers" can describe here what is done on BlockChain with xpub.

Antoine
 
 

Concerning the xpub issue, we enforced extensive investigations and worked to fix it.

It turned out Goochain was only derived address from xpub. Our system was deriving from xpub directly. But BIP44 requests a second level of derivation. In this standard, the first level is to differentiate "change" from "external". Goochain was looking to the children, but BIP44 requests children of children. In a point of view, we weren't fully compliant with BIP44.

We have added an improved BIP44 support. Now the Goochain service checks all paths in chain, from xpub key provided.

From now on, every users of Trezor Wallet can quickly and securely check their wallet balance using Goochain service from the "xpub" code provided by Trezor.


Thanks again for your report!
Antoine

Hi,

thanks for looking into that. It's indeed working now. Are you pulling that information from the blockchain.info API?

Excuse me for slightly going offtopic now but I'm looking for alternative (and maybe open source) blockchain explorers which fully support HD wallet lookup by xpub keys. Do you by any chance know some except blockchain.info? Thanks again for the great service you offer.

Cheers
vertoe

Not at all, we're 100 % independent. We run a full node dedicated for our server. Any others API providers or explorers can go offline, Goochain would be always up.
We also have developed our own BIP32/44 libraries to handle xpub searches and give out addresses list.

First of all, Goochain is not a real block-explorer but a search engine. It gives you basic info and provides links to explorers. It can be seen as a "meta-explorer". Still, Goochain service can be very handy for quick basic check, as HD wallet amount for the current example. Goochain is light-weight and ad-free.
To be fair, I didn't even know BlockChain was providing this xpub feature. This is not documented at all from their side. I don't know any other website that provides this feature. I think some APIs service can have this feature (REST).

Antoine

Small update:

- Bug fixed : sort was not working sometimes

- Transactions list refined

- Transactions searching speed up : Up to 4000 results allowed

- Timeout much less likely


Goochain's volunteer team will be at Bitcoin Expo 2015 in London (http://bitcoinexpo2015.com/#services) this weekend. Hang out with us if you come!

Some Updates :

- HSTS (Strict security) added, https is now graded "A+"

- Speed improvements, notably FistBits (~2x faster)

- Date/Time selection entirely reforged, mobile user experience greatly improved

- Coinb.in block-explorer removed (service was stopped apparently)


If you face issues, flush your browser cache ( CTRL + F5 for a complete reload )
Enjoy!

Friendly bump.

---

This saved me many times. I don't want to remember my full address. Just typing '1MZakir' gives me balance and address. Thank you!

   -MZ

Is it possible to search without an address, as long as the results are <4000? IE, could I search for any transaction on the blockchain between 95 and 96 bitcoins on March 5th 2015, regardless of address?

Great work!

Ones question: shouldn't the search for first bits be case-insensitive?

I see 1GooCh gets a match but 1gooch doesn't.

I thought first bits was supposed to ignore the case.

Thanks for your feedback.

The search is case sensitive. It is just a matter of speed and good user experience: without case segregation, search would be slower and also it would give out a lot more results and take additional time to get every address details of the list. This is a trade-off between speed and usefulness, to stay really user-friendly. Also in everyday life, WORD is equivalent to word but in blockchain world 1goochainblaba is not the same address as 1GOOCHAINblabla.
We are actually working on a new firstbit internal engine that would be real-time, lower the amount limit, and ultimately work with any address in the blockchain. We are also working on a backend replacement so that it would be quicker to get address details. Depending on all our progress and results we would implement case-insensitive search for FirstBit feature.

Please additionally note, these days the real amount limit required is more at 0.04 than 0.02 btc announced (we haven't yet updated our description pages).

Yes, definitively. Only the first 4000 tx would be returned. This is a present limitation and this will be mitigated in the future with pages for example.

For your query you can try something like below:
Click on Date and Amount to get the full fields
https://i.imgur.com/UF4QeJm.png

For a date search, we will improve user-experience. So than when one clicks on a date, it is enough to search this kind. No need to enter time anymore.

Thank you. I think it might have been me not using the time field that was the issue. Unfortunately it's a little difficult for what I want to use it for; searching for a specific payment. In the example above, if 95-96 went to a specific address but you don't know the amount of change, you wouldn't find it.

Are there any plans to implement a search for amount of one output within a time range?

Saw you are off for many days now but the service ia still running. Is the development still ongoing? If yes, I like to see another field when searching by TXID which shows amount transacted, now it shows total output which includes chancge. As a result, we can't know how much BTC was transacted. Thank you! Hope everything is okay for you.

Except for when one of the destination addresses == the spending address, how would you know which one is the change, and which one is the payment?  I do agree that the display could be a bit more verbose, but that could easily start cluttering it up as well.

Not posting here doesn't mean we're off. We're still working on improving the service.  ;)
There are still some bugs fixing, components updates, and also we work to develop the service on business and marketing aspects. The present step is the creation of a consulting and service firm dedicated in Blockchain technology, which will manage and own officially the website.

For the greatest pleasure of all our users, in 3 to 4 weeks, we'll update our service with the following improvements:

• New updated graphical identity, and as a starting point, a new logo will look more "professional"
• A new dedicated page will show results, this will provide unique URL to search results
• Social sharing buttons to give the ability to share (Facebook, Twitter, Reddit, EMail,...) or save (bookmark or print) your search results
• FirstBits search on full Blockchain and real-time. No need to have some funds nor to wait some hours to see the address.  8)

We're considering update the transactions list, and eventually show ProofOfService registrations.

Stay tuned on the Twitter @goochain (https://twitter.com/goochain) to have the latest news and info about our service. This is the most reliable source to keep you updated.


Totally agree. Still, we could add a column or change "Sum Out" so that if dest=spending, it will be subtracted and only transferred amount will be displayed.


Then I can tell you about what's in the pipe and release further :

• Provide more info in transaction list, as detecting ProofOfExistence or similar services
  
• Print out block list when searching in a large time frame
• Search text messages written in the Blockchain
• Improving speed with optimizations and caches

Very good the_beast work, it is very easy to use and very useful. Especially for those who do not have good memory. Thanks for sharing it with us.

Today, we have finally updated our server!
https://goochain.net/img/favicon-194x194.png (https://goochain.net)
- New web interface :

• New Logo
• Responsive web design
• Dedicated page for result
• Saving and social sharing of results (bookmark, print, ...)

- Full FirstBits Search :

• In the whole blockchain, all existing addresses found
  
• Real-Time

also :

• BlockTrail is now the default external link service
• Spent transactions now found when searches for an address
• Several bug fixes and improvements

Enjoy and give it a try!
Antoine

Looks great! Keep up the good work!

Also did you make 'goochain.net' default url? I found links like 'goocha.in' are redirected to 'goochain.net'.

P.S. Maybe you can fetch input and output addresses of a transaction when we search txid. Thank you!

Pretty nice update - Good to see a working FirstBits implementation again for legacy references :)

When clicking the "Modify search" link (or going back in the browser, could fields previously used be automatically expanded?  Right now the page (/browser) remembers the last values (e.g. date range, amount range), but the fields are collapsed.

Yes goochain.net is now the main and default domain name, this is mainly for SEO purpose. The 2 others are redirecting to .net domain.
Please note https for goocha.in and goochain.org could not redirect you directly as there is certificated issue and only goochain.net is valid.
But for http all redirections are working perfectly.


Well, if you search a transaction of a particular amount, inputs are not so relevant. This is like searching in a supermarket cash machine a payment of 20$ and you also want the transactions which have been paid with a 20$ bill. Goochain gives you, for now, all transactions of 20$ (on the bill) and not what was paid using a 20$ bill. A side effet is that it can also gives the transactions where the cashier gives 20$ back, as in blockchain the money back (return output) are outputs like any other outputs.
Also normally you can find the transaction "before" as the input was an output before (to continue the metaphor, the transaction where you were given a 20$ bill)
We'll consider this change after assessing impact on performance and technical details.
Still for Goochain, for a given address, it gives out inputs and outputs, as there's a link through the address.


Sure, we knew about this issue. We have open a ticket internally for this matter to improve that. We think this is a major inconvenient of the user experience. We'll find a way, detecting the previous page was a search result when coming from "Modify" or dont hide if some fields are filled.
For now, we just advise to click again on "Date" and/or "Amount" in case you entered things in it. I think you already guess that ;)


Thanks for your valued feedback on our service!

Can you please add http://walletexplorer.com to block explorer lists?

i have just found your site. Goochain is really interesting to get blockchain data quickly.

I haven't so much communicate about Goochain using this channel recently.

Just a bump up to tell you about new features:
- HD Wallet import tools (various models: Trezor, Ledger). See dedicated page (https://goochain.net/wallet.php)
- ProofOfExistence transactions detected (when a tx is that kind (https://goochain.net/s.php?s=4e9fdb2fcf191847d1a4cd07a79e492bf474e54300e68052957d5f37b5d4b7d1&extserv=blocktrail&dstart=0&dstop=0&min=&max=), it shows a dedicated icon)
- Multi-paper wallet support: now accepts several addresses separated by comma.

Also we manage some slight graphical clean up on transactions listing.

Check out the new slide (https://docs.google.com/presentation/embed?id=1XVSvmlMUyvxKRqgo7q6yccS8rFU27zDbo5H6ZSLua-k&amp;start=false&amp;loop=false&amp;) to see a quick presentation about Goochain service.

Very cool - looks like GooChain is slowly but surely becoming a bit of a hub for determining ID-based service relationships to addresses and transactions :)

We didn't perform so much work on the blockchain search engine, because we worked on a new product : a new affordable wallet for everyone.

Goochain Citadelle, the most affordable hardware wallet.
Goochain Citadelle is a Hardware Wallet that brings Bitcoin technology to the next level. Seamless, the Citadelle is easy to setup and works in pair with a special application tailored for the device.
The very reduced form-factor makes it fit in your pocket and follow you wherever you go. The dongle has been designed to be used with a second factor authentication to enhance the security and the transaction experience, for every Bitcoin users.  Enjoy an easy to use wallet, without sacrificing security.

https://i.imgur.com/ZbcZTeW.png

Security
•   Banking grade hardware security (provided by Ledger)
•   Multi-channels  Second Factor Authentication (powered by GreenAddress API)
•   Full end-to-end encryption with the servers
•   Configurable spending limit

Handy
•   Fast and user-friendly transactions
•   Only remember your PIN access code
•   Tiny form factor, pocket wearable on a keyring
•   Multi platform (Windows, Linux, MacOS, Android)
•   Full easy installer on Windows
•   balance Watch-Only using Goochain web service

Affordable
•   The most affordable hardware wallet of the market
•   Can protect small amount of Bitcoins
•   Ideal for a gift or discover Bitcoin, at budget price


Citadelle product is fully Made in France

Price is 12 EUROS Excl. VAT
Only Bitcoins payment accepted.

Volume discount is 10 EUROS each unit with quantity 5.

OTG (micro) available for 2.5 EUROS (soon)

Worldwide delivery fees : 2€, 4€ for 5x.

Pre Order will be shipped in 2 or 3 weeks, when all the software will be finalize.


See more details there on our website:
https://goochain.net/citadelle


You can enter in the winning contest on Twitter "RT & Win" :
https://twitter.com/Goochain/status/656876955351031809


I'm considering to write up a dedicated topic for that product soon.

Scalability: still shokes on, for instance, 1NxaBCFQwejSZbQfWcYNwgqML5wWoE3rK4

Yes, we're aware of this issue. Any address with more than 100'000 transactions are currently not working.
Unfortunately, we haven't spent so much ressources so far to handle that issue. We are working on a new internal system that will give soon, the basic info for every single addresses. As a first step, that still won't allow searching in "heavy" addresses. Then, we have some ways to improve the rest. Anyway there are lot of corner cases which are not easy to solve.

Any particular reason off-the-shelf tools such as Coinbase's Toshi (https://toshi.io/) or Bitpay's Insight (https://insight.bitpay.com/) are not suited to your use-case? They happily allow that kind of query right away and run fine on an average computer.

Well, if you try Insight with the address you gave, it won't show anything at all. Toshi is far better, but it needs lots of disk space and a really high-end server machine.