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Showing 10 of 10 results by Aleš Janda
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Topic
Board Project Development
Re: Bitnotes: paper notes backed by bitcoins
by
Aleš Janda
on 15/10/2016, 16:37:06 UTC
Partially off-topic:

I was asked for ensuring OP's identity. So yes, I know OP in person. I know him as honest and very active in local (Czech) community. As he is developing this project quite long time, I know this project as well in detail. So it's real Smiley

Maybe I seem quite as newbie but I'm just no very active on Bitcointalk but very active in Bitcoin (also check my register date).
Post
Topic
Board Development & Technical Discussion
Re: Where is witness part in SegWit transaction?
by
Aleš Janda
on 12/05/2016, 08:30:05 UTC
That is the thing! Thank you!

I created address by standard way, then in console
Code:
addwitnessaddress ADDRESS
creates new witness address from it. And transaction from has "txinwitness" part and so on.
Another good tool with examples is https://blockchainprogramming.azurewebsites.net/checktx

Thank you again.

Post
Topic
Board Development & Technical Discussion
Merits 2 from 1 user
Topic OP
Where is witness part in SegWit transaction?
by
Aleš Janda
on 11/05/2016, 14:44:38 UTC
⭐ Merited by ABCbits (2)
Hi,

I'm trying to understand how SegWit transaction looks like.

In article Segregated Witness, Part 1 on BitcoinMagazine.com is written

Quote
from the perspective of Bitcoin nodes that don't use Segregated Witness (lets call them “old nodes”), some newly created outputs might soon use a strange type of scriptPubKeys. Strange, because these scriptPubKeys can hardly be considered a lock at all. Commonly referred to as an “Anyone can spend,” these scriptPubKeys basically proclaim they don't require a signature. Additionally, they will include some meaningless text.
(embolden by me)

So I tried to send some segnet bitcoin from faucet to my address. The transaction outputs look like

Code:
  "outputs": [
    {
...
      "script_pub_key": {
        "asm": "OP_DUP OP_HASH160 b94d3e2318aa7265f5c75be6275c5af35a3751bf OP_EQUALVERIFY OP_CHECKSIG",
...
      },
...
    },
    {
...
      "script_pub_key": {
        "asm": "OP_DUP OP_HASH160 b5255516286472ed5b15833da1d9ea97c8d3f05c OP_EQUALVERIFY OP_CHECKSIG",
...
      },
...
    }
  ],

This looks like standard transaction to me. When I pick random transaction from current blockchain, let's say https://blockchain.info/tx/a569b7a41c9a2567b4a4bad4ed59f5e846cc30d652b448ff6430018fe0bf3128, I see:

Code:
OP_DUP OP_HASH160 ed1fd913ec4f7f1b5699fc77ca9dc9604a840600 OP_EQUALVERIFY OP_CHECKSIG

on output, so the same format.

Also when I get transaction from segwit in hexadecimal and try to decode it in current Bitcoin version, it is the same (except the addresses because address version).

Please, can someone enlighten me what is different on SegWit? Where I can see the witness part? I'm definitely missing something… Smiley

Thanks a lot Smiley

Post
Topic
Board Service Discussion
Re: Linking addresses to wallets?
by
Aleš Janda
on 17/03/2015, 23:13:58 UTC
Don't you mean my WalletExplorer.com? Smiley

www.walletexplorer.com
Post
Topic
Board Development & Technical Discussion
Re: Anonymous transaction in the lightweight wallets
by
Aleš Janda
on 02/02/2014, 17:03:26 UTC
I want to coins will be sent from B-address without sending to myself.
If Not then is it possible to do offline transaction from A to B without registry any information in blockchain?

It isn't how it works. When someone sends you 10 BTC to address A, any next transaction muset be signed with address A. Not address B. If you want to send it from address B, you must send it to B from A firstly.

When do you want anonymity, the best thing that you can do is use any online wallet with shared wallet - any exchange, online bet web and so on - just send BTC to it, wait a moment, send BTC to another address. New bitcoins will be probably other than bitcoins that you sent before.
Post
Topic
Board Bitcoin Discussion
Re: Who has the voting right? miners or the pool
by
Aleš Janda
on 02/02/2014, 16:55:50 UTC
Pool owners have voting rights. They make decisions, miners only sign it.

But it´s democracy - when miner don´t agree with pool´s decisions, he can simply mine at another pool. Or he can mine itself. Or he can create own pool, take people with the same opinions and they mine themselves.

However, there are very few things what pools can change, i.e. only if some transaction will be in this block or not.
Post
Topic
Board Development & Technical Discussion
Re: Get list of all addresses with a balance over x?
by
Aleš Janda
on 18/01/2014, 20:49:45 UTC
Of course it's small, I'm just curious.  There's what, 1e48 possible addresses, and something like 100e6 transactions, but how many of those were to unique addresses?  Do we have 1/1e40 of addresses used, or is it smaller?

Definitelly smaller. We have 2e7 used addressed now, so total space is ~ 5e40 times larger.
Post
Topic
Board Bitcoin Discussion
Re: Is safe running bitcoins with the same wallet on more computers simultaneously?
by
Aleš Janda
on 28/11/2010, 22:14:30 UTC
Ok, thank you very much. It's a pity but I savvy it. Linked services I'll try.
So thanks again.
Post
Topic
Board Bitcoin Discussion
Re: Is safe running bitcoins with the same wallet on more computers simultaneously?
by
Aleš Janda
on 28/11/2010, 20:11:08 UTC
Thank you very much for your reply. If more instances of running program with the same wallet isn't possible, I think it should be documented.

But OK, so I can other scenario:
I have 2 computers, one at home, one at work. I'm running bitcoin at home, then I shut it down, go to work, start running bitcoin there, with the same wallet. Then shut down, go to home, start bitcoin at home and so on. BUT: I don't synchronize files (~/.bitcoin). So I don't run more instances of the same wallet but I don't synchronize current state.

It's this possible? Will be synchronized sent and received payments or are there other problems? Or rather I should use two different wallets, one at home and one at work?
Thanks Smiley
Post
Topic
Board Bitcoin Discussion
Is safe running bitcoins with the same wallet on more computers simultaneously?
by
Aleš Janda
on 28/11/2010, 13:44:12 UTC
Hi,

I would like to use bitcoins but I'm using more than one computer. Can I use just one wallet on all computers (by copying settings)? Or it isn't possible?

What happened if someone send me money and bitcoin client run on more computers? What happened if I send money to anyone from one of clients? Will it be synchronized automatically?

Maybe it's a simple quetsion but I didn't find answer to this.
Thanks.