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Author Topic: [ANN][Datacoin] Datacoin blockchain start announcement (Minor code upd + logo)  (Read 159395 times)
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April 23, 2014, 01:11:44 AM
 #1321

I was playing around with datacoin, but I seem to have found a small issue in the tx data size checking code.

According to the website, data can be up to 128*1024 bytes, and it is stored in binary.

From what I can see, the rpc methods send and receive the transaction data in base64, which makes sense, since it's a json based transport layer. Eventually, in wallet.cpp, that base64 payload gets decoded and placed in the transaction in binary format.

Unfortunately, all the payload size checks are made before decoding, applying the 128k restriction to the base64 encoded data, although it will be stored in binary. This means that when using the RPC calls, the limit for the data is smaller than expected (around 128*3/4 = 96k).


Have I stumbled into a bug, or am I missing something?
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April 24, 2014, 11:47:50 AM
 #1322

I was playing around with datacoin, but I seem to have found a small issue in the tx data size checking code.

According to the website, data can be up to 128*1024 bytes, and it is stored in binary.

From what I can see, the rpc methods send and receive the transaction data in base64, which makes sense, since it's a json based transport layer. Eventually, in wallet.cpp, that base64 payload gets decoded and placed in the transaction in binary format.

Unfortunately, all the payload size checks are made before decoding, applying the 128k restriction to the base64 encoded data, although it will be stored in binary. This means that when using the RPC calls, the limit for the data is smaller than expected (around 128*3/4 = 96k).


Have I stumbled into a bug, or am I missing something?
I also stepped on this and reported it to the original dev, but didnt get any response.
This also means that the fees required are higher to upload data.
infofront
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April 24, 2014, 05:50:32 PM
 #1323

Datacoin is being used in Storj development and testing ( https://bitcointalk.org/index.php?topic=555159.0 ) for now. There can be more plans on DTC - Storj cooperation, when these plans are approved\released, I'll push this info to all DTC threads.

It sounds more like Storj is trying to create a Datacoin competitor/replacement.
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April 24, 2014, 11:18:00 PM
 #1324

Datacoin is being used in Storj development and testing ( https://bitcointalk.org/index.php?topic=555159.0 ) for now. There can be more plans on DTC - Storj cooperation, when these plans are approved\released, I'll push this info to all DTC threads.

It sounds more like Storj is trying to create a Datacoin competitor/replacement.
We are just using it for a testbed for now. Finding out some really cool stuff, and perhaps some possible bugs/exploits.

Bitcoin Dev / Storj - Decentralized Cloud Storage. Winner of Texas Bitcoin Conference Hackathon 2014. / Peercoin Web Lead / Primecoin Web Lead / Armory Guide Author / "Am I the only one that trusts Dogecoin more than the Federal Reserve?"
Joehun
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April 25, 2014, 04:48:44 PM
 #1325

Datacoin is being used in Storj development and testing ( https://bitcointalk.org/index.php?topic=555159.0 ) for now. There can be more plans on DTC - Storj cooperation, when these plans are approved\released, I'll push this info to all DTC threads.

It sounds more like Storj is trying to create a Datacoin competitor/replacement.

DTC has been the first like btc was ever in it's field. This status is unchangeable like stored data in blockchain. :-) It gives unique worth to this coin
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April 25, 2014, 09:33:02 PM
 #1326

Datacoin is being used in Storj development and testing ( https://bitcointalk.org/index.php?topic=555159.0 ) for now. There can be more plans on DTC - Storj cooperation, when these plans are approved\released, I'll push this info to all DTC threads.

It sounds more like Storj is trying to create a Datacoin competitor/replacement.

DTC has been the first like btc was ever in it's field. This status is unchangeable like stored data in blockchain. :-) It gives unique worth to this coin
I agree. I think people underestimate Datacoin as a concept. I think metachains, or chains that describe or store data other than just coins, will be a huge concept by the end of the year.

Bitcoin Dev / Storj - Decentralized Cloud Storage. Winner of Texas Bitcoin Conference Hackathon 2014. / Peercoin Web Lead / Primecoin Web Lead / Armory Guide Author / "Am I the only one that trusts Dogecoin more than the Federal Reserve?"
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April 28, 2014, 11:57:10 AM
 #1327

I think what needs to happen is someone needs to upload sensitive data publicly to the DTC blockchain to stir up talk and start using DTC for what its strength is.  Distributed, unkillable data storage.

Basically what it needs is content.

I have a really cool idea that could be based on datacoin's structure but needs modifications. Im a developer myself but not C++. If someone or a group is interested we can chat about it but I will need to know you a bit first to tell you the idea. It has to do with sensitive data (partly) unkillable.

snowboard789@gmail.com

aris
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May 01, 2014, 07:47:02 AM
 #1328

We need new wallet with new ssl and primecoin-hp-14 code ;-)


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May 01, 2014, 12:32:42 PM
 #1329

Let us get inspired by storj.http://storj.io/assets/paper/storj.pdf
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May 02, 2014, 01:51:00 PM
 #1330

Let us get inspired by storj.http://storj.io/assets/paper/storj.pdf

Yes, with Metadisk Storj is doing great things with Datacoin.  https://github.com/Storj/Metadisk

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May 03, 2014, 08:21:31 AM
 #1331

what s the connection to storj?
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May 03, 2014, 10:23:06 AM
 #1332

what s the connection to storj?
it uses datacoin as backend storage

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extro24
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May 03, 2014, 06:47:17 PM
 #1333

what s the connection to storj?

Strorj is currently running on top of Datacoin, but the dev (super3) has indicated that he will introduce a Storjcoin in the future.

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May 04, 2014, 11:41:28 AM
 #1334

I am just gonna say I told you so and link to what I am talking about
https://bitcointalk.org/index.php?topic=325735.msg4000584#msg4000584
infofront
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May 05, 2014, 04:37:07 PM
 #1335

what s the connection to storj?

Strorj is currently running on top of Datacoin, but the dev (super3) has indicated that he will introduce a Storjcoin in the future.

He might as well just take over development of this coin.
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May 07, 2014, 05:01:12 AM
 #1336

I am just gonna say I told you so and link to what I am talking about
https://bitcointalk.org/index.php?topic=325735.msg4000584#msg4000584
Some very interesting points there.

How about this:
Datacoin becomes encrypted. People want to host files publicly though so they post the file keys online. Soon everyone decides to use a standard key or password for public files to reduce time spent googling, this becomes `The Public Key`. Now datacoin may as well not be encrypted since we can all access the public (and potentially illegal) stuff.
What now?
super3
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May 07, 2014, 10:57:34 PM
 #1337

I am just gonna say I told you so and link to what I am talking about
https://bitcointalk.org/index.php?topic=325735.msg4000584#msg4000584
Some very interesting points there.

How about this:
Datacoin becomes encrypted. People want to host files publicly though so they post the file keys online. Soon everyone decides to use a standard key or password for public files to reduce time spent googling, this becomes `The Public Key`. Now datacoin may as well not be encrypted since we can all access the public (and potentially illegal) stuff.
What now?
Your forgetting scale. I can't store 1GB file in the Datacoin blockchain unless I pay thousands of dollars. It reduces the use case to only small files.

Bitcoin Dev / Storj - Decentralized Cloud Storage. Winner of Texas Bitcoin Conference Hackathon 2014. / Peercoin Web Lead / Primecoin Web Lead / Armory Guide Author / "Am I the only one that trusts Dogecoin more than the Federal Reserve?"
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May 08, 2014, 05:22:29 AM
 #1338

Your forgetting scale. I can't store 1GB file in the Datacoin blockchain unless I pay thousands of dollars. It reduces the use case to only small files.
That is a good point but in the link I quoted the fellow who posted it made several comments about how datacoin being unencrypted would be detrimental to those who supported it.
My scenario regarding publicly published keys was to highlight whether the lack of encryption was a relevant subject. (It isn't in my opinion)
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May 08, 2014, 05:25:24 AM
 #1339

Datacoin seem to rise too never  Sad

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May 08, 2014, 02:02:09 PM
 #1340

I am just gonna say I told you so and link to what I am talking about
https://bitcointalk.org/index.php?topic=325735.msg4000584#msg4000584
Some very interesting points there.

How about this:
Datacoin becomes encrypted. People want to host files publicly though so they post the file keys online. Soon everyone decides to use a standard key or password for public files to reduce time spent googling, this becomes `The Public Key`. Now datacoin may as well not be encrypted since we can all access the public (and potentially illegal) stuff.
What now?
Your forgetting scale. I can't store 1GB file in the Datacoin blockchain unless I pay thousands of dollars. It reduces the use case to only small files.
Its not ment for idiots to publish huge files... Just use a cloud service for what you want to do.

[GPG Public Key]  [Devcoin Builds]  [BBQCoin Builds]  [Multichain Blockexplorer]  [Multichain Blockexplorer - PoS Coins]  [Ufasoft Miner Linux Builds]
BTC/DVC/TRC/FRC: 1K1773RbXRZVRQSSXe9N6N2MUFERvrdu6y ANC/XPM AK1773RTmRKtvbKBCrUu95UQg5iegrqyeA NMC: NK1773Rzv8b4ugmCgX789PbjewA9fL9Dy1 LTC: LKi773RBuPepQH8E6Zb1ponoCvgbU7hHmd EMC: EK1773RxUes1HX1YAGMZ1xVYBBRUCqfDoF BQC: bK1773R1APJz4yTgRkmdKQhjhiMyQpJgfN
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