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July 29, 2021, 09:36:31 PM *
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1  Bitcoin / Bitcoin Discussion / Re: Giving bitcoins as a gift? on: April 07, 2021, 03:21:15 PM
In my point of view it would really depend on how she will take it, what I mean about that is she a person that needs the monetary assistance your Bitcoin will give or will she be more appreciative on receiving gifts that aren't exactly money? Because when you think about it when you say a "gift" you are looking at items and not money, on the other hand if we are talking about money you will always think about it as a donation and not as a gift. At least take this into consideration first if she needs the money or not as she might like having real gifts rather than money from you.
My thoughts are similar.
I am not even sure she would accept them. And she probably wont even need it that much. She has an university degree and has a "good" job. Same with her husband.
But maybe she could use them on her kids or something.

10-15 bitcoins are in today price: $567,900 - $851,700
Feel free to give it to anyone you like. Why so much hesitation :-P

Yeah, it will be a bit crazy but if you have a few thousand coins in your possession then it's peanut for you :-D
 
I wish, but no, I don't have thousands, not even hundreds, but I do have some.

I am in the habit of not believing everything I read in the forums. To give 10-15 Bitcoins to a woman for helping me I should have at least 100 Bitcoins. Unless she had saved my life, in her case, maybe if I only had 16-20 Bitcoins I would be thinking about giving her 15 or 20. And much less my decision would depend on what they say in a forum.

So I don't believe the story.
You don't have to Smiley
She practically did save my life. Or maybe I would be alive, but life would be very different without her having done what she did.
Funny that for her, what she did, was not a big thing. For me it changed my life.
2  Bitcoin / Bitcoin Discussion / Giving bitcoins as a gift? on: April 07, 2021, 01:36:41 PM

I have been thinking...
Would it be totally crazy, if I gave 10-15 bitcoins to a woman, who helped me in a really really big way when I was younger.

I mean, would she think I was crazy if I do it?
Would it be a positive thing? Or just weird?

The coins were not worth much when I got them, so from that perspective, it's not THAT big a deal, right?

I would gladly give them to her, but I fear it could have a negative effect to what little friendship we have

And she is married with kids, so while I will always like her, there is no hidden agenda on my part here.   

3  Other / Off-topic / Re: Best war movies you have seen! on: December 15, 2020, 10:19:39 AM
the war film that impressed me the most was '300'...
I heard it was a true story, so it amazed me with the strength and dexterity of the 300 warriors. I really like the old war movies that fight using strategy and horses, not just using guns and bombs.

True story... LOL.
Well, the idea of 300 is based on a true story. But do you really think the enemy was THAT inhuman and cruel? I think they were just a "normal" big enemy force.  

My favourite is "The winter war", which is an unbelievable true story.
4  Bitcoin / Bitcoin Discussion / Re: Screenshot of Satoshi's last post on this forum on: December 13, 2020, 12:13:59 PM
Satoshi has a balance of nearly 1 million BTC, let's guess what will happen if the wallet can be accessed by someone, whether it's the owner or maybe a hacker. Will the price of Bitcoin start to crumble and start not selling?
If it's hacker he will sell it ASAP and it will make Bitcoin price has major dump, because 1 million BTC and FUD will affect Bitcoin price a lot.

Well. If it is a hacker, BTC would go to zero. If a hacker can crack ~20000 addresses, that would mean that bitcoin has a serious weakness, and the same hacker could crack almost any address he wants.

But if it would be Satoshi, or a hacker that stole the keys from Satoshi, then that would just be a temporary "glitch" in the price of BTC
5  Other / Off-topic / Re: Laptop for gaming purposes? on: December 09, 2020, 01:50:13 PM
The best price/power gaming laptop currently is:

Hp pavilion gaming 15-EC-1011NS
AMD Ryzen 5 4600H/8GB/512GB SSD(M.2NVMe)/GTX 1650/15.6"
The price is around 600

With those specs and price It's hard to find a more capable laptop.
Of course if you put 2x the money you will get a better laptop, but it is also 2x the money.

The negatives are: the display and plastic case, but with those specks you really can't complain.



6  Bitcoin / Bitcoin Technical Support / Re: Generating private and public key pairs not just address? on: December 09, 2020, 01:35:19 PM
You can use bitaddress to derive the public key.
You only need to click on "Wallet Details" button and enter your private key.

Bitaddress is an excellent tool. BUT never use it from the web-page. You are supposed to download a copy of bitaddress to your own machine, and use it locally. Preferably offline and after verifying the download.

You really wouldn't want to put bitcoins to an address, which has a private key that has been in the internet  Sad

As said, Electrum is a good choice too. Just double check that you download it from the right web-page. As there are web-pages that look a lot like official  Electrum pages, but give you a hacked version of it.  And you will end up losing your coins if you use them.

7  Bitcoin / Bitcoin Discussion / Made my first payment with bitpay :D on: December 09, 2020, 01:24:15 PM
Bitcoin has come a long way.
Yesterday I made my first payment using bitpay and electrum. It was surprisingly easy.
Easy enough for any normal non-technical person to be able to do the same.

The only drawback was that the fee was automatically set to be quite high: 72 sat/byte, when 10 say/byte would have confirmed in approximately one hour. And still it took more than 30min to confirm.


And the remaining BTC in my address are still worth more than what I paid for them. Even though I have used parts of them several times already.
 Grin
8  Bitcoin / Development & Technical Discussion / Re: Catastrophic P2SH public addresses? on: June 24, 2020, 10:38:47 AM
Here is what I came up with. It may not be the simplest possible solution, but it is quite pedagogical, yes?
Code:
OP_PUSHDATA1 1 0x01
OP_PUSHDATA1 1 0x02
OP_EQUALVERIFY
Since 1 is never equal to 2, and there are no other inputs or variables, when the script is executed, it must always return FALSE.

This public address is thus provable unspendable. A Bitcoin black hole. Beware.

Actually...
I think that address is NOT completely unspendable.
It is unspendable with your script, yes, but if someone can come up with another script that has the same hash and that returns TRUE, then with that script the address is spendable Cheesy

9  Bitcoin / Bitcoin Discussion / Re: Bitcoin Is History Now - Bitcoin Transfer Going 3 Weeks - 2986+ Confirmations on: June 22, 2020, 05:47:25 PM
The transfer is considered "finished" after ~6 confirmations. After that the transfer is permanently in the blockchain and no-one can change or remove it.

All transfers will keep getting more and more confirmations as long as the bitcoin network is alive.

So no problem there Cheesy
10  Bitcoin / Development & Technical Discussion / Re: bitcoin-cli - how to get coinbase address from earlier blocks on: June 17, 2020, 08:31:02 PM
What he meant is P2PK scripts are Pay-to-Public-Key (read it literally to understand  Wink).
You shouldn't derive the address based from that Public Key because the owner wont be able to spend it using the "P2PKH" script even if he has the private key.
Fast forward, 11 years later. Some of my fans are doing tribute payments. Small amounts keep coming. Through the years i accumulated over 18 bitcoins. However lots of them were made by doing a P2PKH-payment to the 1A1...DifNa address. For example:

So why can't I spent the above output when I have all the ingredients needed for prove? Genuine question, I'm sure I miss something. Also: if I can't spent these kind of outputs it would mean all these tribute transactions are unspendable (assuming thet have been paid using P2PKH transactions, not P2PK).

Well...
You can spend the extra "donations", because they are in a P2PKH address, that you DO have a private key to. The private key is the same for both P2PK and P2PKH "addresses" made from the same key.
The only difference is that P2PK address works with ONLY the one private key it was created with, but the P2PKH address works with 2^96 different private keys. So you could say the P2PK is safer in that way.

But Satoshi made the Genesis-block special. It is impossible to use the 50BTC block reward of the genesis block before all bitcoins are mined. The donated 18BTC can be used though.
11  Bitcoin / Development & Technical Discussion / Re: Pollard's kangaroo ECDLP solver on: June 15, 2020, 11:33:10 AM
-snip-
mean 789.789 is value can u div pubkey by above value ?

Can`t and nobody can`t. devider must be integer not float. all pubkeys Q=k*G, where k - integer.

Sorry for continuing an off topic discussion, but:

Of course you can divide by 789.789 if you want.

because 789.789=789789/1000 , which doesn't have decimals in it AND you can divide and multiply by scalar numbers.

Don't know why would anyone want to divide by 789.789, but it s possible
12  Bitcoin / Bitcoin Discussion / Re: Do we know what is the biggest time difference between blocks? (Since 2009) on: June 06, 2020, 12:08:44 PM
Making threads are fine but some people don't like it (me included) if you create a new thread when the answer to your topic is easy to find on the internet. It would be a different case if you create 10 interesting topics.

Actually I find it interesting to find out that it took more than a day still in the 15000 block "range".

So at least this IS an interesting topic, that many readers would not have googled by themselves.

Anyone know what is the longest gap in the recent few years?
13  Bitcoin / Development & Technical Discussion / Re: How to get pubkeys for many adresses ? Script or util needed. on: June 04, 2020, 04:56:51 PM
I have a 200 BTC addresses and I need Public key for this addressees, can you help me with a link for code or utility for doing this ?

I assume all of those addresses belong to you Tongue

Also, I'm wondering what your use case is for these 200 public keys?

I bet they are 200 addresses with most bitcoins in them that have a public key visible. So the OP can try to crack them.

Good luck with that!

BTW. If you try to crack keys, and happen to succeed, it is not very nice to steal from exchanges, because you would be  stealing from a lot of people. Most of the biggest addresses are exchanges.
A little better (although still not nice) would be trying to find private keys to some of Satoshis addresses. There are about 20000 addresses with 50BTC in each and public key is visible in all of them.

But yeah. I don't believe you can find private keys to any of those addresses. So no worries. Atleast it is a good math/computer exercise if nothing else.
14  Other / Serious discussion / Re: Corona Virus and the forum members on: March 31, 2020, 08:16:16 PM
I had corona. Was no fun, but it wasn't THAT bad.

Now I have been healthy for almost 2 weeks.
Still have a little reduced lung capacity, but it is getting better every day.

At first after getting better I was afraid that the lung damage would be permanent.

PS. Most people have a mild case of corona.
15  Other / Off-topic / Re: Covid-19 virus update on: March 29, 2020, 01:59:10 PM
My country
- Shut down all stores and entertainment services. Only food and medical stores are allowed to open.
- Shut down all public transportation services, and going out is restricted
- People are forced to wear mask, if not we will be punish, and punish form is money
- It is prohibited to make a crowd at public place
- People are encouraged to work at home
- Many companies shut down


Same here, except that we have 78000 cases. Guess what country Smiley
But here we are not forced to wear masks.

I already had corona, but still I have to be in quarantine like everyone else. It is crazy. There are already 14000 recovered cases here, who are now immune to corona. (actually much more, because most mild cases are not even tested)
We cant get it again and can't infect anyone.
We could do something useful instead of being in quarantine for no reason. Sad



16  Bitcoin / Development & Technical Discussion / Re: Bitcoin Testnet Faucet? i can pay for thath on: February 10, 2020, 03:59:28 PM

i have only $20 usd in btc you accept this? for 5 TBTC ? and make the deal  now
I want the tBTC back within 1 month and (transaction) fees are payed by you when i return the collateral...

How would that work?
Obviously he can't give you ALL the tBTC back, if he does some testing.
Because there are fees in testnet too Smiley

So you would only get back 5 tBTC:s minus testnet fees.

PS. While I understand you want them back, the collateral is awfully close to selling. 
17  Bitcoin / Development & Technical Discussion / Re: Testnet Faucet on: February 10, 2020, 03:15:25 PM
The big "problem" is that the coinbase reward on the testnet is low (0.39 tBTC + fees) and the hashrate on the test network is high. Basically, most tBTC has already been mined,

I do really hope people will return the tBTC, like i said above: tBTC is worthless, but that doesn't make it easy to come by, so the more worthless tBTC is returned, the more people i can help.

Wow. I didn't know the block reward was already THAT low in testnet  Undecided

Do you have an address for donating extra coins? I should have a little less than 4 coins somewhere.

Testnet coins being hard to get defeats the whole purpose of testnet. Don't you think it would be a good time to reset the whole testnet (or just start a new one on a side), so that anyone can play with it as much as they want. Or are we "testing" what will happen when block rewards end altogether?

What would be needed to start a new testnet and make it public? Just one machine mining it and keeping it alive? And a faucet for the coins. And maybe a block explorer for it.
Running a new testnet and a faucet would be cheaper than mining the "old" testnet.

I don't thing anyone would have any reason to oppose having a sizeable pre-mine for the faucet, say 1M coins. (since they are worthless)
 
18  Other / Off-topic / Re: Why try to go into space? Why not build a device that can communicate with other on: January 12, 2020, 06:54:52 AM
Communicating is one thing.

Spreading the human race is another. If something bad happens to Earth, life can continue in other places if we have spread it there.

Would be sad to think that we are forever bound to this rock we call Earth  Wink

That is why it is interesting to follow what SpaceX and BO are doing.
19  Bitcoin / Development & Technical Discussion / Re: Is there any limitation of P2SH? on: January 12, 2020, 06:49:08 AM
I just got this thought experiment in my head: can we live only with P2SH?

I like the succinct P2SH approach. It sounds perfect if all the scripts could be done in this way.

That made me have an interesting thought.
Could P2SH be quantum safe? As it is NOT based on public keys, which are weak with QC.

P2SH is antiquated now, not the best place to look for novel functionality.

Antiquated? I thought that P2SH is still the only way to do your own "creative" scripts that will be accepted by the network. Like the first implementation of segwith showed.
20  Bitcoin / Development & Technical Discussion / Re: Should SHA256 be replaced with SHA512? on: January 12, 2020, 06:36:07 AM
the only reason for even considering a replacement for the hash algorithm (SHA-256) is if there were any security risk in using it. for example in the future maybe finding a collision for SHA-256 became as easy as finding a SHA-1 collision today. in which case the replacement should be to a different algorithm not the exact thing (ie. SHA-512).

lets not forget that if we change SHA-256 to SHA-512 we also have to probably change the elliptic curve to a 512 (or 521) bit curve. and that would hugely increase transaction sizes as both hashes and signatures would take twice the previous space.
There was a discussion here where change to SHA512 was suggested with only using the first 256 bits of the result. That way security would be increased while transaction sizes would not take more space.

And if SHA512 would be slower, that would just be an added bonus   Wink

With 64bit CPU:s SHA512 would actually be faster to calculate than SHA256. That is if the modern CPUs didn't have dedicated instruction sets for speeding up calculating SHA256, which they do.

And I do not think we would have to change the elliptic curve if we just change the hash algorithm. We could, but they aren't really connected.
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