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5301  Bitcoin / Development & Technical Discussion / Re: Free of charge transactions in blockchain on: December 05, 2017, 09:44:11 AM
Is there blockchain crypto-currency protocols which allows to implement a free of charge transaction between users?
Is it possible or not and why?

I think 'blockchain' is the non-fitting word here.
It is possible to create (and implement) free of charge systems. There are quite a few out already. But not with a blockchain.
Currencies which have such a 'feature' would be IOTA or ByteBall (where there are tx fees for byteball) for example. They both are utilizing DAG (Direct Acyclic Graph, just google it).

In IOTA's case you have to solve/confirm 2 other transactions to be able to push 1 TX. But im not completely sure on that.
Such a system is definetly possible, as already proven by IOTA. But IMO its not really necessary to have a system with zero fee. I'm fine with paying a small fee when sending stuff around.
5302  Bitcoin / Development & Technical Discussion / Re: Signature Forging on: December 05, 2017, 09:33:02 AM
To be able to send BTC around you need to first create a Transactions (containing of Inputs/Outputs), and afterwards sign the TX with the corresponding private key(s).
As you (hopefully) already read, it is impossible (in human terms) to 'crack' the private key out of a public key.
Each TX which is not signed with the private key (which only the 'owner of the btc' should have) it will not get accepted by the nodes in the BTC network.
Each node has the ability to verify the signature of the TX's with the corresponding public key. This basically means the following:
  • You are able to 'sign' a TX with a private key(only you know)
  • Others are able to verify this signature with the public key

There is no possible attack vector in 'forging transactions'.
5303  Economy / Speculation / Re: What will be the impact to bitcoin price after CME future start trading? on: December 05, 2017, 09:22:35 AM
I agree with the idea of Bitcoin making a few 'hops' and going to rise a bit and also with the volatility which will rise.
But i don't think this will be a long term state (of btc). Price may be going to get pumped a bit, followed by investors realizing their profits.
After this (more volatily) timeframe btc is probably going to 'stabalize' again, provided big whales aren't going hard on manipulating the price of BTC.
In the end CME starting future trades is a step forwards in the right direction to get bitcoin adoptet more widely.
5304  Economy / Services / Re: [1 SLOT] ChipMixer Signature Campaign | 0.00075 BTC/post on: December 05, 2017, 12:34:26 AM
I would love to join this campaign!

Username: bob123
Post Count: 1055
BTC Address: 1E86W5d6CYXom1eACQtA8iARpEcVALEUuF

Will change everything immediately after being accepted.
Thanks!

Accepted, welcome.

Thanks!
5305  Bitcoin / Hardware wallets / Re: Ledger nano S on: December 03, 2017, 03:12:35 PM
Could you give us a bit more information about how (or when) this started happening?
Is everything related to your nano s up to date?
Check if your software is at least this version or newer:
  • Ledger Wallet Bitcoin Chrome app: v1.9.10
  • Nano S firmware: v1.3.1

What exactly happens when you open the BTC Wallet chrome app and plug in your nano s? Does it try to verify the authenticity of your nano s? Or doesn't it even recognize you plugged in your device?
Is this the first time you are trying to open your wallets or did it just stop working someday? (This is a crucial point to understand your problem better)
It also would be nice to know where you bought your nano s. From their website, amazon, reseller ?

If its not reacting to the nano s being plugged in at all:
Did you already try it out on more than just one pc? Are you sure the USB-Port is working?
You could try an USB-port which is sitting 'directly on the mainboard'. Not the front-side ports and without any additional cables/extensions.

If there is an error message displayed it would be pretty useful to see a screenshot or getting any further information about your error.
5306  Economy / Services / Re: [1 SLOT] ChipMixer Signature Campaign | 0.00075 BTC/post on: December 03, 2017, 07:21:17 AM
I would love to join this campaign!

Username: bob123
Post Count: 1055
BTC Address: 1E86W5d6CYXom1eACQtA8iARpEcVALEUuF

Will change everything immediately after being accepted.
Thanks!
5307  Bitcoin / Hardware wallets / Re: Ledger Nano S Phrase recovery not valid .Please need help on: December 02, 2017, 05:42:10 PM
Pls keep in mind that the recovery sheet of the nano s is ordered horizontally in the 2x12 grid. This might have confused you?
Maybe you wrote them vertically instead of horizontally? Would be worth a try.
If that didnt work you could try to check whether all of your words appear in the BIP39 word list. But make sure to do this offline (and make sure you use a bootable linux distro
and don't leave any traces on the pc before connecting it again to the internet; linux is pretty much suitable for this).
If you have found a word thats not in the list you could try to search for similar words in the list and try out those.
If this doesn't work out you could try to create a simple script which checks the "most similar looking" words around of your written words. This wouln't be too hard to write but you
should again make sure to do this offline. Otherwise i don't see a chance of you getting your 'right' seed back.
5308  Economy / Services / Re: Looking for people with exceptional post quality!!! Big Reward! on: November 30, 2017, 04:52:08 AM
Bitcointalk Username: bob123
Bitcointalk Profile: https://bitcointalk.org/index.php?action=profile;u=57962
Rank: Sr. Member

Avatar would be available!
5309  Economy / Web Wallets / Re: Blockchain.info issues? on: November 28, 2017, 06:02:11 PM
Thats one of the reasons to not use an online wallet. You have to rely on their services to be able to access your funds.
I would recommend to get a desktop or even a mobile wallet. A wallet where you have control of your private keys and therefore your money.
You can find a variety of wallets here: https://bitcoin.org/en/wallets/desktop/windows/.
Do yourself a favor and protect your coins from 3rd parties holding your funds.
5310  Bitcoin / Bitcoin Discussion / Re: Bitcoin Whales questions? on: November 28, 2017, 05:55:24 PM
Those multi millionaires why are they not cashing at $10000 and become multi millionaires now? What are they waiting for  Huh

Most of them are already millionaires. They don't need to cash out. Others want to gain more profit because thats their business.
And a few for sure have quite a big amount of btc but can't cash them out without paying too much taxes. So they make use of their BTC
and earn money from that on. Additionally its not that easy to sell big(!) amounts of bitcoin at once. Online exchanges have daily/monthly limits.
And private trades attract scammers. And if you are able to live from your BTC, why should you cash out to a fiat currency where the inflation rate eats up your money.
5311  Alternate cryptocurrencies / Altcoin Discussion / Re: Research Ico on: November 28, 2017, 05:30:56 PM
Like already mentioned the website of the ICO is the first step to start with. Look at the site notice and evaluate how trustworthy the whole concept is.
A big indicator for a good (or a bad) ico is how they plan to spend their funds. Not just how the token is distributed, but how much money has been assigned to
several next steps in their project. After reading their whitepaper and anything else thats on their website a personal meeting would be the best option if you
really plan to invest big into an ICO. You can't invest big into ICO without personally knowing the persons behind this project.
5312  Alternate cryptocurrencies / Altcoin Discussion / Re: Low market cap coins with lower price - High potential coins in future? on: November 28, 2017, 04:50:31 PM
Well.. this depends on how you define "high potential", in terms of being able to get profits, yes.
But coins with a low market cap are more vulnerable to typical pump/dump shemes.
Whales have a big influence onto low market cap coins. If you try to enjoy the ride you may get nice profits.
But if you stay on the train for too long you will probably crash with it (e.g. BCH, even tho market cap is not that small).
5313  Bitcoin / Development & Technical Discussion / Re: does operating a fullnode favourize my transactions? on: November 28, 2017, 04:42:03 PM
There are some other benefits from running a full node, like helping the network, also, it is safer since you will not have to trust an external server when broadcasting your transactions, in addition to that, in case of hard fork, you will have the possibility to choose which blockchain you want to support.

It is no way safer using a full node as wallet than using a lightweight wallet like electrum. You never need to trust 'an external server' when broadcasting the TX.
You can always push your transaction yourself. But you have to relay it to other nodes. How you will accomplish this.. is up to you.
Has nothing to do with running a full node for security reasons. And in case of hardforks there is no disadvantage in using a lightweight wallet either.
With a backup for a mnemonic seed or any priv keys backups you are always 'safe' from all hardforks whatsoever.
5314  Bitcoin / Development & Technical Discussion / Re: 🔥🔥🔥 Pattern bitcoin hash160 problem!!!!!!! 🔥🔥🔥 on: November 28, 2017, 04:19:28 PM
why  1FeefsqjLUeoanRrFxRFVUaPdTKUD4Vvhz  =    a0b098dd7f36e3da2d692e97ecf6ca07dadf4501
and   1FeefigBjmAAMepTiT2uziK2YnSXKkreD    =     02c5406b2e2a1c5a1b6b3fff03937185d23ea339

HuhHuh? hash160 not same Huh normaly

I guess you think that if the first part of the address starts with a specific string the hash is also starting with a specific string?
If so.. then your false. Change 1 bit and your hash is completely different. You have 2 different addresses and both have a completely different hash.
Everything is fine. You should read yourself into hash functions: https://en.wikipedia.org/wiki/Hash_function
This effect of small changes of the input leading to a completely different hash is desirable. Its called the avalanche effect (https://en.wikipedia.org/wiki/Avalanche_effect).
5315  Bitcoin / Bitcoin Discussion / Re: BTC vs BCH vs BCG on: November 28, 2017, 03:58:31 PM
I hope this is more of a joke. If you are really new and don't have a clue: BTC is and will be the real bitcoin forever.
BTC is the real, first created, bitcoin. BCH was a fork with a "fix" to the scaling issue.. But the deves never realized that on-chain scaling
is not the solution and can't be. BTG was a fork just for the devs to get rich. There were a big premining phase and the price will get pumped and dumped afterwards,
leaving the devs a big amount of money and users who thought BTG might be a trustworthy investement have the damage.
You should be very carefully when investing into altcoins. BTC is the 'safest' investement in crypto.
5316  Bitcoin / Hardware wallets / Re: Need to reset ledger nano s - Where to transfer XRP in the meanwhile? on: November 28, 2017, 12:10:39 PM
You can create an address via github (e.g. https://octillionsa.github.io/generate-ripple-wallet/).
Take care and do this step on an offline pc. After you have sent your xrp to this new address, you can reinitialize your ledger.
To send your xrp back to the ledger you again have to log into an offline pc and sign the transaction offline, then publishing it on an online device.

But you also could just check your seed on an offline device. For this you can download a BIP39 address generator (btc) and compare the top addresses with your ledger address.
5317  Bitcoin / Hardware wallets / Re: Can't decide between Trezor and Ledger Nano S on: November 28, 2017, 12:02:40 PM
Trezor is the best choice if you can spend a few more bucks because it has much better features and compromising your security for a small amount isn't smart.

This sounds like trezor devices are more secured. Thats not true. Both, the trezor and ledger nano, are on the same level security wise.
Trezor even had a bug in one of the last firmwares where an attacker with physical access to the device could have read out the seed, in some circumstances,
because it was dumped to the RAM unencrypted while resetting. You can't have 100% security. Both are fine.
5318  Bitcoin / Bitcoin Technical Support / Re: HELP!!! :-) on: November 28, 2017, 11:11:04 AM
Depending on the amount of your coins you should be carefully when downloading a wallet and handling your unencrypted private key.
If your priv key is sitting unencrypted on your hard drive i would first disconnect your pc from the internet.
On a clean pc then you can download a wallet of your choice (https://bitcoin.org/en/choose-your-wallet) which supports private key import.
With a lightweigt wallet you don't have to download the full blockchain (e.g. electrum). After importing the private key into your new wallet you can then
send those coins wherever you want to.
5319  Bitcoin / Bitcoin Technical Support / Re: Producing a deterministic wallet on: November 28, 2017, 09:57:55 AM
There are other ways to achieve the same thing, like using python to convert a random seed to an xprv, then use a fixed derivation path to derive private keys from this xprv, then use the private key to generate a public key, and the public key to generate an address...

Python is pretty suitable for this imo. The bitcoin-python libary is pretty user friendly.
With bitcoin-python its basically just this to create the priv-/pub key pair out of a seed:

Code:
priv = sha256('ultrasecure password phrase')

pub = privtopub(priv)
addr= pubtoaddr(pub)

Now if you want to make a deterministic wallet you can modify your seed each time you generate a new address with a speficic pattern.
This way your (random) seed phrase is of course not importable to electrum or other wallets. You would have to calculate the priv key out of your seed 'manually' each time.
5320  Bitcoin / Hardware wallets / Re: PLEASE HELP: LOST BTC ON LEDGER NANO S WALLET on: November 28, 2017, 09:30:56 AM
First, resetting your nano wasn't necessary. The nano s just supports different types of addresses to store your coins on.
Now, that you have resettet your nano s with (hopefully) the right seed phrase, check which blockchain you are using at the moment at the top right corner.




You have to click on Settings -> Blockchain. Then choose Bitcoin (assuming you are talking about the original BTC bitcoin and not BCH bitcoin cash).
Now regarding wheter you used an address in legacy or in segwit format you have to click the corresponding button.
Do you remember how the address on your ledger you sent the funds to started? Probably with an 1 or 3?
If it started with an 1 you need to click on legacy, with a 3 on segwit.
You don't have to worry about your coins getting lost. You can 'switch' between these two formats without any problems.
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