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Showing 20 of 56 results by rpstatic
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Topic
Board Bitcoin Technical Support
Re: First BitCoin transaction
by
rpstatic
on 09/08/2018, 06:51:14 UTC
The first one is always frightening  Wink

You can always check your status on the block explorer and it can take a while until you get your first confirmation. I had one transaction in january and had to wait for days until it was confirmed.

Just always double check your address, especially the end (you can brute force addresses that look similar to yours, but only the beginning of the address).
Post
Topic
Board Development & Technical Discussion
Re: New to bitcoin programming
by
rpstatic
on 06/08/2018, 08:50:59 UTC
Post
Topic
Board Development & Technical Discussion
Re: Extracting the Private Key from a TREZOR ... with a 70 $ Oscilloscope
by
rpstatic
on 03/08/2018, 10:49:46 UTC
I get a malware warning from WOT on this website. Are there other (more established) sites who published this article also. Otherwise could someone summarize the main points?  Cheesy
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Topic
Board Development & Technical Discussion
Re: i'd like to start educating others about blockchain: main points?
by
rpstatic
on 03/08/2018, 05:57:38 UTC
what are main areas that are fundamental to learn in order to fully understand blockchain, so that they can do the same with others and become valuable members of crypto community?

Which aspect of blockchains? Do you mean to fully undertand the technical details or just a brief overview about blockchains that they are able to use it?
Post
Topic
Board Beginners & Help
Re: How to protect myself from RBF?
by
rpstatic
on 02/08/2018, 07:35:16 UTC
Replace by fee (RBF) just means that the sender can resend the transaction with a higher fee, if they accidentally set a low fee and dont want to wait hours for confirmations. It is possible to double spend an unconfirmed transaction without RBF flag.

When the transaction has 1 confirmation it is safe from double spend attacks. Thats why it is important to wait ca 10 minutes for 1 confirmation before sending the product. For high amounts some people prefer to wait for 3+ confirmations.

If there is 1 confirmation does it mean you can't do RBF?

No, you can only use RBF for unconfirmed transactions. Otherwise your transaction was already put into a block and added to the chain.
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Topic
Board Development & Technical Discussion
Re: How can we make Bitcoin/ Lightning more user friendly?
by
rpstatic
on 31/07/2018, 08:22:08 UTC
It has to be easy. No setup, no sending to the lightning nodes, everything has to happen automatically.

I tested the wallet (was called zap when I remember correctly) and it would be too hard to set it up for a non-tech person. People don't want a complicated setup, they want an app on their smartphone which just works. That's it.
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Topic
Board Development & Technical Discussion
Re: Collection of 18.509 found and used Brainwallets
by
rpstatic
on 30/07/2018, 17:31:18 UTC
Did you also find wallets with any balance on it? Would be interesting if people still use them.
Post
Topic
Board Bitcoin Technical Support
Re: BIP 70 python(Flask) - payment with two outputs
by
rpstatic
on 26/07/2018, 13:18:13 UTC
You didn't provide much info.

If you have the bitcoin CLI available, look for listunspent, createrawtransaction, signrawtransaction and broadcastrawtransaction.
Post
Topic
Board Beginners & Help
Re: how to have 25 $ daily ???
by
rpstatic
on 26/07/2018, 13:13:06 UTC
What do you think? 25$ per day without any effort? Sure ...

I can only recommend that you learn some useful skills and after a few years you will have a decent income. Maybe software development if you prefer to work from home.
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Topic
Board Development & Technical Discussion
Re: Development Environment to get started
by
rpstatic
on 26/07/2018, 09:16:57 UTC
Bitcoin core is written in C, so any IDE / text editor + compiler would be enough.

For solidity, you can take a look here (https://solidity.readthedocs.io/en/develop/).
Multiple plugins for several IDE's are available, according to the docs, remix(https://remix.ethereum.org/), a browser based IDE, is suggested for developing smart contracts.
However, you can find an solidity extension for visual studio here: https://marketplace.visualstudio.com/items?itemName=ConsenSys.Solidity.

Thank you for your feedback. I will checkout the extension, I really like visual studio code.
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Topic
Board Development & Technical Discussion
Development Environment to get started
by
rpstatic
on 25/07/2018, 09:00:13 UTC
I am pretty new to blockchain development and would like to know how I can get started. My idea would be an linux enviroment (proably ubuntu) with visual studio code.

I will use it mainly for qt wallets and will also checkout solidity. Is vs code suited for this or should I use another iDE?
Post
Topic
Board Bitcoin Technical Support
Re: Retrieve private key from seed and pubblic address
by
rpstatic
on 25/07/2018, 08:33:31 UTC
ismine function returns false...
So nothing, I was soooo sure, but wrong -_-

Thanks everybody for the help!

I assume the function look up your address only in the listed ones and therefore you will get false as result. You could try to create a raw transaction and let electrum only sign it for you.

Just an idea, don't know if it will work.
Post
Topic
Board Beginners & Help
Re: Parsing unix timestamp from CLI response with jq
by
rpstatic
on 20/07/2018, 07:50:28 UTC
Not sure if you can use this but if you simply want to convert that to a readable date, you can use:

Code:
date -d @1440604784 +'%d.%m.%Y'

The output would be:

26.08.2015

Thank you. I used another approach, but your idea helped me to find the right solution for my issue.

e.g. (output truncated):
Code:
bitcoin-cli listtransactions | jq '.[].time |=(. | strftime("%Y-%m-%d"))'

Result:
Code:
{
  "txid": "5756ff16e2b9f881cd15b8a7e478b4899965f87f553b6210d0f8e5bf5be7df1d",
  "blockhash": "0000000000000000027d0985fef71cbc05a5ee5cdbdc4c6baf2307e6c5db8591",
  "blockheight": 371622,
  "confirmations": 160829,
  "time": "2015-08-26",
  "blocktime": 1440604784,
  "isCoinBase": true,
  "valueOut": 25.37726812,
  "size": 185
}
Post
Topic
Board Beginners & Help
Re: Electrum: What does bad-txns-vin-empty mean?
by
rpstatic
on 19/07/2018, 09:11:43 UTC
I think the error is related to you trying to spend coins with a segwit scrip/adress, while the wallet/server you are using doesn't recognize the script, and is thus unable to broadcast it.

Which is pretty weird, considering i also use Electrum segwit and never had any issues.

Try switching electrum servers, see if that does anything?

https://bitcoin.stackexchange.com/questions/75942/16-bad-txns-vin-empty-code-26/75944

Thank you! Switching the server worked and I was able to broadcast the transaction.
Post
Topic
Board Beginners & Help
Electrum: What does bad-txns-vin-empty mean?
by
rpstatic
on 19/07/2018, 08:52:19 UTC
Code:
I wanted to test out a segwit wallet on electrum, but when I broadcast a new transaction I get the this error.
[code]
error: {'code': 1, 'message': 'the transaction was rejected by network rules.\n\n16: bad-txns-vin-empty

Steps to reproduce
1. Create new segwit wallet with electrum
2. Send funds to an andress from this wallet
3. Send funds from this address

What does this error mean and how can I fix it?[/code]
Post
Topic
Board Beginners & Help
Parsing unix timestamp from CLI response with jq
by
rpstatic
on 18/07/2018, 11:55:16 UTC
I would like to query data with the CLI and parse the response. I am using the terminal with jq for this.

{                                                                                                                                                   
  "txid": "5756ff16e2b9f881cd15b8a7e478b4899965f87f553b6210d0f8e5bf5be7df1d",                                                                                                                                                                                               
  "blockhash": "0000000000000000027d0985fef71cbc05a5ee5cdbdc4c6baf2307e6c5db8591",                                                                   
  "blockheight": 371622,                                                                                                                             
  "confirmations": 160829,                                                                                                                           
  "time": 1440604784,                                                                                                                               
  "blocktime": 1440604784,                                                                                                                           
  "isCoinBase": true,                                                                                                                               
  "valueOut": 25.37726812,                                                                                                                           
  "size": 185                                                                                                                                       
}

My goal is to change the unix timestamps to another format and pipe the result to another command.

So, the block time should be changed from this
  "blocktime": 1440604784,                                                                                                                           

to this
  "blocktime": "18.07.2018"
Post
Topic
Board Electrum
Electrum: Can you recover new change addresses from seed?
by
rpstatic
on 18/07/2018, 07:54:53 UTC
I noticed a a nasty bug on the electrum wallet. If you use it regularly and don't have any change addresses left, electrum will create new ones for you.

If you then restore the wallet from the seed, the newly generated addresses aren't visible / availalable anymore. How can I check the correct balance on my new wallet? Would it be possible to sign from the missing change addresses?
Post
Topic
Board Altcoin Discussion
Re: Cost of dApp development on ethereum blockchain?
by
rpstatic
on 18/07/2018, 06:17:59 UTC
On https://ethgasstation.info/ , the standard transaction cost seems $0.218 right now. What is this standard? How much raw data (in bytes) can it be carried per transaction at this cost?

This is the maximal cost for the standard gas limit of 21000 (typically used for a standard ETH transaction). You can adjust this with the "Gas-Time-Price Estimator" on this site.

I am not sure how many bytes a standard transaction need.
Post
Topic
Board Development & Technical Discussion
Re: Setting up nodes.
by
rpstatic
on 13/07/2018, 07:13:44 UTC
1. How can i set up masternodes (I tried to do a research and watching online but I'm still confused)

This is different from coin to coin. The best way to test it out is to search for a coin which has maternodes and a active testnet. Then you can just ask for coins on the testnet (they do not have any worth) and create a test setup.

2. Do I need to have a VPS in order to create a node?

No, but it is probably recommended. You don't know which kind of software you are executing, even if it's open source. Not every new altcoin is reviewed.

3. What does the VPS do in regards with setting up node?

VPS stand for Virtual Private Server and is in the most cases just a separated Environment (An Operating System on Shared Hardware Resources) on a server.

4. Is it risky? Or atleast may I know what are the risk I will face when I setup a node?

Yes, could be. There are also many scams and they can infect your computer with malware.
Post
Topic
Board Bitcoin Technical Support
Re: Any Trusted BTC Wallet?
by
rpstatic
on 13/07/2018, 07:02:15 UTC
You will find the most common wallets in the link from mocacinno.

Electrum is probably (I didn't check any statistics) the one which is mainly used. Before using it you should understand change addresses.