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September 26, 2018, 03:40:38 PM *
News: ♦♦ New info! Bitcoin Core users absolutely must upgrade to previously-announced 0.16.3 [Torrent]. All Bitcoin users should temporarily trust confirmations slightly less. More info.
 
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1  Bitcoin / Development & Technical Discussion / Re: Looking for an analyzer tool for blockchain on: Today at 01:21:09 PM
Hello
I just looking for kind of tools, to analyser blockchain on altcoin
Reach list
Coin source, generated date etc
Some statistics about coin circulation
For now I just what to ask: Is there any analyse tool for kind of task?
Or better just download blockchain to some DB and create statistics by myself?

This is not a analyse tool, this is a site with the information you are looking for: https://coinmarketcap.com/

If you try to download all the coins blockchain will take you a long time, let's remember just bitcoin core is bigger than 200Gb, now if you add BCH then you will need 400Gb only for those 2 coins. So not a good option.

If you really want to get a tool for this recommend you to build it by yourself with the coinmarketcap api https://pro.coinmarketcap.com/ as they say
Quote
The world's cryptocurrency data authority has a professional API made for you.

If you can code it by yourself then pay for it  Wink
2  Other / Beginners & Help / Re: Free Cryptocurrency book, "How cryptocurrency saved my life" on: September 25, 2018, 03:51:58 PM
V1: This version will feature the opening Preface and Financial Markets Chapter Samples. More will be added to the chapters, I am just looking for feedback.
Click here to read it

I just take a read to give you some feedback and enjoy that small lecture. At start you say:

Quote
This book won’t make you millions of dollars...

And i'm not agree with that, because each book who introduce you to bitcoin world is a opportunity to become rich  Wink and other think i would like to qote was:

Quote
I want to teach you how to be a winner and make money, but even with my help lots of you will be losers. It is the hard truth I am sorry, but it is true. That’s a painful thing to hear, “there is a chance you will be a loser”

You are talking a little rough to your readers, some people could get offended for that and stop reading in that point, but i know what you mean, i got it because i have experience with trading and some times we make bad decisions. But not sure if that make us losers, rememberer we just lose a fight, but we haven't lose the war.

By the way, i will wait to see your book finished, i want to read it all,for sure you have some great knowledge to share with us.
3  Alternate cryptocurrencies / Altcoin Discussion / Re: Trying to survive on: September 25, 2018, 01:49:31 PM
... is it right to do something with your money when you are unstable in emotions?...

That's a hard question, i have been unstable in emotions the past month and use my money to feel better, i bought some new toys like a camara and a audio recorder, at end was wise to do that than spend it on casinos or by investing. But at end that doesn't fix the problem. As we say in my country, money doesn't make you happy, but it helps.

At end my best recommendation is to hold, because if you keep investing and moving that money, with the panic you will end in red numbers and that will make you feel worst.
4  Bitcoin / Bitcoin Discussion / Re: Was Satoshi Nakamoto visionless? on: September 25, 2018, 01:42:25 PM
Speed of the transaction in Bitcoin can be enhanced by upgrading. You forgot to mention that you need days if you are going  to transact in a bank for a certain amount and it can even freeze your account.

I know they can freeze my acount and as you say, some transactions take days, but at end the number of transactions they do are massive and not comparable with bitcoin.

...
Yes, for me this is the biggest obstacle for bitcoin to become a global currency, transaction speed.
Unless the blocktime of bitcoin reduced, i think peoples will prefer to use another crypto to pay something faster.

There are two solutiosn, the first one is like you say, blocktime reduction, that would provide more transactions confirmed in the same period of time, the other way is bigger blocks, this way we could have more transactionsin one block. But at end the solution is to mix this two options, bigger and faster blocks, but again, that will end in a huge blockchain and not sure if we want that.
5  Local / Primeros pasos y ayuda / Re: CONCURSO SEMANAL DE MERITO 24 AL 30 DE SEPTIEMBRE on: September 25, 2018, 01:22:44 PM
Por cierto, me he quedado con las ganas de saber qué miembro legendario de este foro une lo espiritual y lo culinario.

VOD, es Pastafari

Y es culinario por que se lame su propia teta? jajaja

Jamás pensé que VOD sería la respuesta, creo que es un personaje respetable y que ha encarado a un gran numero de estafadores y gente abusiva en el foro, nunca le vi lo espiritual pero aveces si postea sobre comida, recuerdo un post en el que hablaba de las propinas, se ve que le gusta salir a comer a diversos sitios.  Grin
6  Bitcoin / Bitcoin Discussion / Re: Do you think there's another way to pay in the future? on: September 25, 2018, 01:12:28 PM
Im thinking like an micro chip implanted in our body. This system is not out of the picture because how we discover things every year, it is not impossible that in the future this things may happen and it will boom like btc.

This technology is called NFC (Near field communication) And one company is already using it with their employers, they have a chip in the hand and use it to open doors, pay a coffee and receive their payment. The problem about that technology is the vulnerabilities, some one can easy clone your NFC code just by standing on your side, and some one can charge you a payment just by be in the same room.

https://www.youtube.com/watch?v=EKks3vfiy6Q How NFC phones can steal your credit card info.

So, this is part of the future, is the first step, we need to make it more secure and will be the favourite payment method, just because it's easy.
7  Local / Mercadillo / Re: Solicito un préstamo no garantizado de 0.55 BTC, para pagar en 2 meses o antes. on: September 24, 2018, 07:48:57 PM
Requiero un préstamo sin garantia de 0.55 BTC que reembolsaré en un tiempo máximo de 2 meses (seguramente lo pagaré mucho antes). Otorgaré un porcentaje de ganancia a quien pueda prestarme el 0.55 BTC del 10% del préstamo.

Con esto quiero decir que, al prestarme 0.55 BTC en el momento de pagar el monto del préstamo, también obtendrá un 10% de ganancia, es decir, devolveré 0.605 BTC.

Mi billetera BTC: 186uQoWo7JGoroPBdKA9qk4Uz3guGh3Qse

Ok ok vamos por partes amigo, cuando quieras un préstamo te recomiendo solicitarlo en la sección de prestamos la cual puedes acceder con el siguiente link: https://bitcointalk.org/index.php?board=65.0

Segundo, una regla básica de los prestamos es el colateral, básicamente sin colateral no hay préstamo asi que si quiere que alguien te preste$3000, deberás ofrecer un colateral del mismo valor, puede ser esa cantidad en monedas alternas, o alguna cuenta online que tenga ese valor.

Ten en cuenta que nadie te va a prestar $3000 confiando a ciegas, nada nos garantiza que no correrás con el dinero, así que si no cumples con este requisito puedes irte olvidando del préstamo.
8  Other / Off-topic / Re: What does a man desire most in a woman? on: September 24, 2018, 03:54:08 PM
Since this section is off topic, I feel this is the right place to ask this question.

1. As a man what's that one thing you desire in a woman that can make you say I do?

2. What's that one thing you hate about women that can make you leave them and walk away?

I need a sincere answers.

1.- What i desire from a woman is to make a team in life, but not to invade her life or use her to complement mine, each one on their way and having some convergence points.

2.- Is hard to hate something about those beauties... but what i hate in my personal experience is when words doesn't fix the problems, and they prefers to walk away.
9  Bitcoin / Project Development / Re: Arbitrage Tool on: September 24, 2018, 03:25:11 PM
Hey, great tool!

I just save it in my favs list, that gap between coins is always a great chance to make profit, what i don't like about it is that some times we need to move a big amounts of money to make low profit (move $1000 to earn $10), and there is always the risk of a price drop while we are on the move. So, is a chance to make money but there is always a risk.
10  Local / Primeros pasos y ayuda / Re: CONCURSO SEMANAL DE MERITO 24 AL 30 DE SEPTIEMBRE on: September 24, 2018, 03:10:17 PM


PREGUNTA 9 (hasta 5 méritos)
Pregunta abierta: Enlaza el post más raro que hayas encontrado navegando por el foro.



Creo que lo mas raro que me he visto en el foro es el arbol de penes...

https://bitcointalk.org/index.php?topic=777829.0

El hecho de pensar que alguien gano mas de 20 bitcoins dibujando penes en MS paint es una locura... Tuve la oportunidad de conocer a ese personaje en los casinos y incluso me toco ser un personaje de sus obras.
11  Bitcoin / Bitcoin Technical Support / Re: Best way to create watch only wallet? on: September 24, 2018, 02:51:19 PM
The video you post was about how to create a raw transaction, and that's other topic, after reading your posts i'm not sure what are you trying to do, but it looks like an onchain engine. You need to give more clear ideas about what are you trying.

By the way, if you wan a watch only wallet, you don't need bitcoin core for it, you can use commands like
Code:
curl, wget or lynx
to read the information form the addy direct on the web, that way you can avoid running the full node.
12  Bitcoin / Bitcoin Technical Support / Re: BTC address given, but BCH funds sent on: September 24, 2018, 02:38:06 PM
Lot of people are having the same problem since BCH comes to life, at end you had the privatekey from the addy, so no problem at all, you only have to import that privatekey to a BCH wallet and you will have access to the money. Now imagine if you get that deposit on a exchanger or a casino, damn, there is where the problems start, could take lot of days for the business to fix it.

That's why we mus be really careful with those transactions, other way we can risk and sometimes lose money.
13  Local / Español (Spanish) / Re: Me quisieron estafar estilo blackmirror on: September 24, 2018, 02:32:09 PM
Ingeniería social, la mejor erramienta de los hackers hoy en día. Y como podemos apreciar el usuario en si es la mayor vulnerabilidad. Cuesta trabajo creer que gente realmente cae en esto, pero al final son probabilidades, si uno de cada 10,000 cae, entonces solo hay que mandar 100,000 correros para generar 10 clientes.

Al final los usuarios de bitcoin son inteligente, el simple echo de endender bitcoin lo demuestra, pero al parecer algunos siguen siendo victimas de su propia ignoracia, gracias por compartir el caso y ten cuidado la proxima vez que des tu correo en un Airdrop, te recomiendo abrir un segundo correo nadamas para eso.
14  Bitcoin / Bitcoin Discussion / Re: Soon we would not need banks on: September 24, 2018, 02:16:40 PM
How soon is soon?

I'm not agree with this theory, because coin cores doesn't have the power to process the almost 100k transactions/second that banks process now days.

Maybe a small % of people can substitute banks with bitcoin, but at end there is no enough for all.  
15  Bitcoin / Bitcoin Discussion / Re: LIKE IT OR NOT, BITCOIN IS AN INVESTMENT on: September 24, 2018, 02:03:31 PM
                              In an economic sense,
 An INVESTMENT is the purchase of goods that are not consumed today but are used in the future to create wealth.
                                        In finance
An INVESTMENT is a monetary asset purchased with the idea that the asset will provide income in the future or will later be sold at a higher price for a profit.

I really don't want to turn these into an economics class but the both definition of what investments are clearly should settle the argument of whether BTC is truly an investment or not.


i'm not agree with you, or at least half agree, it can be an investment if you hold it, but it can be fiat if you use it... If you buy one bitcoin, then join to a casino and multiply it, then cash out from the casino and sell both btc to get the cash, can we call it an investment? i don't think so, because if that's an investment, then go to casino with cash is an investment too.
16  Bitcoin / Development & Technical Discussion / Re: Why explorers have problems with segwit address? on: September 23, 2018, 11:57:46 PM
As we can see on the next transaction, the segwit address don't have a link or aren't even posted:
~
In theory segwit is compatible with bitcoin core, so, why the exchangers don't give info about them?
you meant to say... "why the explorers don't give..."?
it's because they haven't changed their codes for parsing and processing blockchain data
they extracted then indexed data from blockchain for easy searching and viewing
because they haven't updated their indexing codes they missed indexing bech32 addresses


You are right, i was talking about explorers, not about exchangers.

And thanks to user piotr_n and Theb for the recommendation, looks like btc.com and blockchair.com are the right explorers to go when we are talking about segwit transactions. They give the info i was looking for.
17  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][CLAM] CLAMs, Proof-Of-Chain, Proof-Of-Working-Stake, a.k.a. "Clamcoin" on: September 23, 2018, 11:46:18 PM

I like the looks of https://btcpop.co/

Their exchange stakes for you while you trade.  (So you can leave coins for sale on the ask without losing staking profits while you wait.)

I'm going to continue to use Bittrex until OCT 4.  I still think they are nuts for delisting CLAM and will hopefully come to their sense by then.  Plus, Bittrex has discounted CLAMS for sale atm that are super easy to withdraw.  

FreeBitcoins will have a bid/ask eventually, but we are going to have to find a new trading home after OCT 4 too.  (quitting trading bittrex a day earlier to be safe)

The website www.JustCLAM.com just released a few days ago as the first exclusive CLAM trading site.  The owner is some Indian dude that I've never seen before and no 2fa offered atm.

Thanks for your reply, i will take a look to both sites, the second one looks really interesting, an exchanger only for clam, not sure about how much trust in them, but will give them a try for small with small amounts.

Is weird to see how some exchanger ask for 0.0032 and other ones ask for 0.0024, that crazy gap is a nice business opportunity.
18  Local / Primeros pasos y ayuda / Re: Tutorial para crear una Blockchain como la de Bitcoin desde 0 on: September 23, 2018, 06:44:35 PM
Hola amigos.

Les comparto este tutorial que estoy creando en youtube para programar nuestra propia blockchain.

Espero que sea de su agrado.

 https://youtu.be/x0rc90gHWKk


Excelente tutorial, cabe destacar que esto es programación orientada a objetos y una lastima que la programación sea en código Go, creo que hubiera sido mucho mejor el ver la creación de una cadena de bloques con JavaScript.

A mi me gustaria crear una moneda con las siguientes caracteristicas.

Limitada a 100 millones.

Minable con Raspberry

¿Por donde puedo empezar?

Para esto no tienes que crear un blockchain desde cero, para esto te conviene hacer un clon de la moneda que quieras y modificar el parámetro de el limite de la moneda.
19  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][CLAM] CLAMs, Proof-Of-Chain, Proof-Of-Working-Stake, a.k.a. "Clamcoin" on: September 23, 2018, 06:29:58 PM

BITTREX info The BTC-CLAM market will be delisted on 10/5/2018

Damn, this looks bad... Bittrex without clam, poloniex and shapeshift with stuck clam, so the question is where to buy and sell clams now days?

I see options like:

https://yobit.net/en/trade/CLAM/BTC
https://www.cryptopia.co.nz/Exchange?market=CLAM_BTC
https://bitsane.com/exchange/clam-btc

But i don't want to join to a exchanger who will ask for pictures and id's, any recomendation?
20  Bitcoin / Bitcoin Technical Support / Re: Possible bug in decoderawtransaction in 16.02? on: September 23, 2018, 05:28:59 PM
This is a known issue and unfortunately it cannot be fixed without a fork. The issue lies with the format of a segwit transaction itself. A segwit transaction, under some circumstances, can be interpreted as either a 0 input, 1 output transaction, or as a witness transaction. Since getrawtransaction fetches transactions from blocks themselves or from the mempool, the transaction must be a valid network transaction and thus witness serialization can be attempted safely as a first step and only deserializing as non-witness if the witness deserialization fails.

However, decoderawtransaction behaves differently as it is intended to be used during the transaction creation steps. This means that it must be able to handle 0-input, 1 output transactions (which are inherently non-witness) as users may create a 0-input, 1 output transaction, decode it, and then pass it to fundrawtransaction to get inputs. But because some 0-input, 1 output transactions can be interpreted as witness transactions, and some witness transactions can be interpreted as 0-input, 1 output transactions, decoderawtransaction does not always succeed to decoding a transaction correctly. It uses some heuristics in order to decrease the number of false decodings, but sometimes, as you can clearly see, it's wrong.
Thanks, very informative. I didn't know decoderawtranscaction was intended to be used during transaction creation steps.

Fortunately, if you know that a transaction is witness you can set the iswitness argument (added in 0.16) to true to tell it explicitly to decode the transaction as witness. You can set it to false for non-witness decoding. Not setting it uses the heuristics.

So your command will be something like:
Code:
bitcoin-cli decoderawtransaction <tx> true
Yes, this does indeed work! The documentation found at https://bitcoin.org/en/developer-reference#decoderawtransaction doesn't list the second parameter. According to the documentation decoderawtransaction only takes a single parameter. Guess the documentation isn't up to date here.

One last question about the heuristic in this specific case: It's pretty clear the assumption made this was a transaction without witness data is wrong based on the fact it's reporting a negative value as an amount. So shouldn't the "heuristic algoritm" reassess itself when the output generated was clearly wrong:

Code:
Input -> Trying as non witness -> Output is valid -> Done
Input -> Trying as non witness -> Output is invalid -> Trying as witness ->Output is valid -> Done

I might be oversimplifying things here but it seems to me this would lead to a lot less incorrect assumptions from heuristics.

Nice to see this get fixed, as you commented before, no one talk about that second parameter for decoderawtransaction, the true at end makes the difference. avoiding the problem. Maybe you can change the topic to Fixed and close the thread now.  Wink

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