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3581  Bitcoin / Mining speculation / Re: how to mine bitcoins from antminer s7 or s9 from home ? on: July 25, 2017, 08:49:27 AM
i want to know how i can start like i am newbie in this.

i want to know about cloud mining on a website and cloud mining at home.

if i have to invest in cloud mining then which is the best website for cloud mining where i can get maximum profit like antpool gives maximum profit but its in chinese and i came to know we cannot invest on that website without buying antminer machine. Is it true ? please confirm.

next if i buy antminer s-7 how do i install in my computer machine and what i have to do exactly just keep my computer turned on and run software or what exactly i have to do ? after i install antminer s-7 do i need to connect to antpool or what ?

i am so confused i know few things about cloud mining and i want full details, can please someone shed light for newbies so they can get answer from this thread too like i will get it after i reply this thread maybe.

Don't fall for cloudmining, 99% of those companies are plain scams, the other 1% lets you carry all the risks for a small portion of the rewards.... Doesn't sound like a good deal to me Wink

You're overthinking it about the S7's installation. The S7 has some sort of raspberry-pi attached to the machine, so you don't need an external computer. Everything is pre-installed, it's kind of plug-and-play... Just plug in your PSU, plug in the ATP cable (networkcable), surf to the web GUI from your PC, enter the details your pool shows you (the stratum+rpc server, port, username, password), then just let the ASIC hash...

Before even thinking about buying an antminer, answer philipma1957's question tough!!! IS you power cheap?Huh
3582  Bitcoin / Mining speculation / Re: [WTA]I WANT BUILD MY OWN FARM THAT CAN EARN 10 BTC AT LEAST A DAY on: July 24, 2017, 02:03:04 PM
SINCE I AM NEWBIE IN THIS FORUM...I JUST WANT YOUR ANSWER....WHAT I NEED AND HOW MUCH I NEED TO BUILD MY OWN FARM...(MACHINE+ELECTRIC+INTERNET+RENT+ANYTHING ELSE)...BAD ENGLISH..I TRY TO IMPROVE MY ENGLISH SKILLS

Please, stop using only uppercase letters, it hurts my eyes.

In bitcoin mining, the best ASIC (hashrate/Kwu) at the market today is the S9:
https://www.cryptocompare.com/mining/bitmain/antminer-s9-miner/

~1375 Watt =~ 13 Th

Since you didn't include your electricity cost, i guessed it would be around 15 cent/Kwu.
At this moment, current diff, block reward, BTC price and 15cent/kwu:

https://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=13000&p=1375&pc=0.15&pf=1&d=804525194568.13200000&r=12.50000000&er=2804.56000000&hc=0.00

1xS9 ~ 0.00406319 BTC/day

You'd need about 2500 antminer S9's to make 10 BTC/day

1 S9 costs $1248
+ customs (21% in my country)  = $262
+ decent PSU =~ $300
+ Shipping/handling = ??$100??
+ part of a rack = ?
+ part of an A/C unit = ?
+ part of renting a warehouse = ?

I estimate you'd need to invest close to 5 million dollars in order to purchase a farm that makes 10 BTC/day
3583  Bitcoin / Electrum / Re: Electrum doesn't run from Terminal anymore on: July 24, 2017, 09:43:11 AM
When I updated Electrum some time ago, the readme file said to open it via terminal (as double clicking the file itself didn't work).
However, now even that doesn't work.

I open terminal in the Electrum directory and do ./electrum, but nothing happens.

Anyone else with a similar experience ? How do I open it ?

Which OS are you using, and which electrum version fails to start?
3584  Economy / Service Announcements / Re: [ANN] ChipMixer - mixing reinvented on: July 24, 2017, 09:39:30 AM
Bitmixer is now closed. Great news for ChipMixer! I'm wondering how the traffic towards chipmixer will be now that BM is closed, and I wish there was a way to track it. Either way, as sad as it is to see such a huge name disappear from the privacy aspect of mixing coins, this could potentially have some amazing positive effects on bitmixer. Good luck, chipmixer!

I hope there isn't a way to verify if the traffic went up, it would mean both mixer were keeping logs Wink
3585  Economy / Services / Re: [OPEN] ChipMixer Signature Campaign | 0.00075 BTC/post on: July 24, 2017, 09:37:47 AM
Username: mocacinno
Post Count: 1672
BTC Address: 1MocACiWLM8bYn8pCrYjy6uHq4U3CkxLaa
3586  Alternate cryptocurrencies / Mining (Altcoins) / Re: What and how should I mine? on: July 24, 2017, 06:51:45 AM
-I have access to free electricity and a couple dozen Windows pc units. I'll post the specs at the end.
-What I want to know is, what is the easiest or most profitable cryptocurrency to mine?
-I do not have any money to buy any extra equipment or do any upgrades.
-Please point me to a guide on how to mine whatever you suggest.
SPECS.
CPU: i3-3110M 2.40GHz
Ram: 4GB
GPU: https://ribletjorb.tumblr.com/image/163358130871

Usually, i'd say it was best to mine some altcoins using your GPU, but looking at that screenshot, it looks like it's a GPU that's embedded on your motherboard.
Your best shot might be to mine CPU-only altcoins, altough i wouldn't expect much profit from them.

If i were you, i'd close this topic, and open a new one in the altcoin mining subforum, specifically asking which altcoin you can mine with an i3. Expect very little profits, expect huge power draw, expect possibly shortened lifespan from your hardware (untested)
3587  Other / Meta / Re: Stake your Bitcoin address here on: July 24, 2017, 06:12:49 AM
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is Kemarit from bitcoincointalk ;u=667916 today is 07/24/2017 and staking my address:
16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
-----BEGIN SIGNATURE-----
16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
IM6lOz76j4LCpNqTtsaNHxYWe5cBvtabzdxDX1XsIOLiJ85mcDQKYnIbVhR7gS6t/UYMsjELuvQpsQ5YCXw1F3E=
-----END BITCOIN SIGNED MESSAGE-----


-----BEGIN BITCOIN SIGNED MESSAGE-----
This is Kemarit from bitcoincointalk ;u=667916 today is 07/24/2017 and staking my address: 16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
-----BEGIN SIGNATURE-----
16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
INzgfxr2Q+12eL0wWgucUJwn1+m25WM1OQSWrDyDJQPJEDqgpuN57CVcsiLoGamYNyh0daJx1ENJTl7IbeMbVGc=
-----END BITCOIN SIGNED MESSAGE-----

Can someone please verify it again? I just verified it using coinig and https://tools.bitcoin.com/verify-message/

I think it has something to do with the extra spaces. Thanks again.

Thanks everyone.

It verifies using electrum Smiley
3588  Other / Meta / Re: Stake your Bitcoin address here on: July 24, 2017, 05:44:38 AM
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is Kemarit from bitcoincointalk ;u=667916 today is 07/24/2017 and staking my address:
16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
-----BEGIN SIGNATURE-----
16fZskMLcsWMW6tNYWwkUQk5UA4hnUUE5J
IM6lOz76j4LCpNqTtsaNHxYWe5cBvtabzdxDX1XsIOLiJ85mcDQKYnIbVhR7gS6t/UYMsjELuvQpsQ5YCXw1F3E=
-----END BITCOIN SIGNED MESSAGE-----

quoted, but i cannot verify the signature, not with my own tool, nor with electrum 2.8.2
3589  Bitcoin / Development & Technical Discussion / Re: UTXO amount decrease on: July 20, 2017, 01:45:53 PM
Hello,

There is point that I can not understand, It would be great if someone could explain it. As we know UTXO is amount of unspent transactions. In my opinion, the amount of UTXOs should be always increasing. For example, If userA has 10 BTC and he sends 7 BTC to userB. In this case, unspent transaction for userA would be 3 BTC and for userB UTXO would be 7 BTC. as a total value, the amount of unspent transaction output will be always same which 10 BTC in my case. As long as we know that miners get 12.5 btc for every validation.By the help of this fact, the amount of UTXO in blockchain should always be increased in every 10 minutes. However when I check the blockchain.info I see the amount of UTXOs decreased in some extent. Maybe the time while validating transaction could be the reason for this but i am not sure about that. Could you please explain it to me.

Thank you.

I could also consolidate unspent outputs.
For example, i have received 1000 payments of 0.001 BTC in the past. I'm able to spend 1000 unspent outputs.
If i decided to purchase a 0.999 BTC item, i would use all 1000 unspent outputs as an input, and i would generate one new unspent output (and 0.001 as a fee, which will likely not be enough).

If my transaction was the only one that made it into the last block, the utxo set would have decease by 999, since i have used 1000 unspent outputs, and only created one new unspent output Smiley
3590  Bitcoin / Electrum / Re: A few questions regarding addresses on: July 20, 2017, 12:58:10 PM
Hi,

I have a few questions regarding Electrum. I hope you can help me.

1) Can I make several transfers to the same address in Electrum or do I have to use a new one every time.
2) If I only use one address => Would transaction fees than be lower as Electrum does not have to combine coins from several adresses to send to one output?

1) yes, you can make several transactions to the same address. However, if you want some extra privacy, it might be a good idear to generate a new address each time.

2) no, the fees would be exactly the same. Electrum needs to combine unspent outputs and use them as inputs to create a new output. It does not matter if all those inputs are signed by the private key belonging to one address or multiple addresses. It's the amount of inputs (and newly generated outputs) that determines the transaction size, not the amount of addresses. In turn, the fee is calculated based on this transaction size...
3591  Local / Nederlands (Dutch) / Re: Zoek Belgische bitcoin verkoper on: July 20, 2017, 11:15:40 AM
Ik zoek een nieuwe partner uit belgie die ik als aanspreekpunt kan gebruiken om dagelijks/wekelijks bitcoins van te kopen via bank overboeking. Wellicht kunnen we ook een paar keer afspreken. Je hoeft in de weekend niet bereikbaar te zijn. Het gaat om bedragen tussen de 100 tot 3500 euro, graag hoor ik de commissiekosten.

Voor mij is het persoonlijk contact belangrijk omdat ik nieuw ben met bitcoins en vast en zeker vragen zal hebben.

Vanwaar ben je precies? Het antwoord kan via PM Wink
3592  Bitcoin / Wallet software / Re: Moving from Multibit HD on: July 20, 2017, 10:55:11 AM
Fed up with problems of Multibit HD now (have to restore back to the first backup every time I have to open my wallet, otherwise password does not work) I've decided to move to another desktop wallet.
For now I'm considering Electrum, is this the best choice? Please suggest.
And secondly, what is the best and quickest way to move my coins from one wallet to another?


I've been using electrum for years without a hitch... I would consider it secure and easy to use.
The easyest way to move your coins would be to create one single transaction using your multibit HD spending all unspent outputs as an input and only generating one output that can be spent by the first address of your new electrum wallet.

In other words: create a new, clean electrum wallet, generate a payment request, then withdraw everything in your multibit HD to this electrum-generated address... Since it's a transaction between two wallets you own, you can cheap out on the fees a little bit Wink

BTW: don't discard the recovery seed phrase of your multibit HD, it's a good habit never to throw away these things...
Thanks, one little query, suppose I have 100 mB, can I actually make a transaction of exactly 100 mB or should I have to leave some for fees?
If yes, then how much? Because the fees are being set dynamically in Multibit HD so not sure how much fees will be for my particular transaction? Is there a way to calculate?


I've actually written a little tool to help with such query's Wink
https://www.mocacinno.com/page/feeestimate

Just enter the number of inputs, and one output, and you'll know exactly what the most optimal fee at this very moment should be...
3593  Bitcoin / Wallet software / Re: Moving from Multibit HD on: July 20, 2017, 09:29:46 AM
Fed up with problems of Multibit HD now (have to restore back to the first backup every time I have to open my wallet, otherwise password does not work) I've decided to move to another desktop wallet.
For now I'm considering Electrum, is this the best choice? Please suggest.
And secondly, what is the best and quickest way to move my coins from one wallet to another?


I've been using electrum for years without a hitch... I would consider it secure and easy to use.
The easyest way to move your coins would be to create one single transaction using your multibit HD spending all unspent outputs as an input and only generating one output that can be spent by the first address of your new electrum wallet.

In other words: create a new, clean electrum wallet, generate a payment request, then withdraw everything in your multibit HD to this electrum-generated address... Since it's a transaction between two wallets you own, you can cheap out on the fees a little bit Wink

BTW: don't discard the recovery seed phrase of your multibit HD, it's a good habit never to throw away these things...
3594  Other / Beginners & Help / Re: Help with wallet on: July 19, 2017, 01:32:38 PM
So, if I keep only the passphrase, can I get back my wallet
from another client (not Electrum) ?

Or I can deduce the private key from the passphrase ?

I understand that if I keep only my private key, it's enough
to access my coins with any wallet.

1) no, usually you can only use the seed (passphrase) to restore your wallet within electrum. This is because other wallets use different derivation paths.

2) yes, you can deduct the xprv from the seed, and in turn, you can derive all private keys from this xprv.

3) yes, your private keys are sufficient. However, most wallets (including electrum) create new private keys -> public keys -> addresses in order to use as a change address every time you create a transaction. Also, each time you generate a payment request, most wallets will generate a new private key/public key/address combination. If you only export/backup your current private keys, you won't be able to spend BTC that was sent to the new addresses that were generated afterwards.
This is why it makes more sense to save your seed phrase. When restoring your wallet using this seedphrase, electrum will be able to regenerate your xprv, and regenerate ALL funded private keys/public keys/addresses, not only the ones that were in use at the time of the backup Wink
3595  Other / Beginners & Help / Re: Help with wallet on: July 19, 2017, 11:44:23 AM
Hello I have a question about my wallet.
If I keep my private key and I break my computer,
can I download a wallet on another computer and
access my money ?
Thank you !

yes... As long as the wallet you pick on the new computer allows you to import private keys (like bitcoin core or electrum)
3596  Other / Meta / Re: Randomly gifted with BCT accounts on: July 19, 2017, 09:14:54 AM
so the other day i was gifted a hero account by a member
he just sent user and pass and told me i can use the acc
all posts and writing style is same
i dont know why they do this but its nice to have a hero for free.
can enroll and roll right away
but why i dont know
do u know why this happens some times
thanks

I've never heared about this happening... I would immediately assume it's either a hacked account that's going to be pained red pretty soon, or it's somebody that gave you his account so you would gain activity over time, only to claim it back in a couple of months/years after it has been promoted to legendary...
3597  Bitcoin / Bitcoin Discussion / Re: Where should I store my bitcoin for the new few weeks? on: July 19, 2017, 09:09:54 AM
I keep my bitcoins in online wallet. Even if the division they are not going anywhere. I think that people too much emphasis on 1 August. Even with separation can cause problems with transactions but no coins in storage.

Even if your online wallet isn't going anywhere, there's a possibility two sustainable coins will emerge after the fork, and there's a real possibility your online wallet might only support one of them.
In other words: you'll lose all unspent outputs on the unsupported chain...
3598  Bitcoin / Bitcoin Discussion / Re: Where should I store my bitcoin for the new few weeks? on: July 19, 2017, 08:03:38 AM
I hold some in bitpanda.com and some in blockchain.info

During this whole fork situation - where should I keep my bitcoins? Should I download the bitcoin core wallet to my computer and move the coins there?

Should I just leave them in their online wallets?

If I move them to a local computer wallet, what do I need to do when bitcoin forks? Do I need to do something to get the same amount of coins in the new chain? (Download a core wallet for the new one so I have bitcoins in both the original and the forked?) (if so how??)


Thankyou all - I don't really care about which chain is the successor etc I just care about being on THE chain and not being left with coins in the wrong place


Thoughts appreciated
Thankyou

If you worry to much as to where will you hold your bitcoins then store it in wallets with private keys. But for me I will do the most simplest thing to do before August 1. I will exchange my bitcoin to other altcoins or exchange it to dollars which is more safer than keeping it on wallets having no bitcoin is more safer than having bitcoin at all. After the problems are settled then I will just buy some bitcoins using my dollars.

I'm not really into altcoin exchanges and market predictions, but isn't there a risk you'll have to sell your BTC when the price is low, and re-buy the BTC when the price is high? (in other words, isn't there a big risk you'll start with x BTC and end with x-y BTC?)
3599  Bitcoin / Bitcoin Discussion / Re: Where should I store my bitcoin for the new few weeks? on: July 19, 2017, 07:59:59 AM
I hold some in bitpanda.com and some in blockchain.info

During this whole fork situation - where should I keep my bitcoins? Should I download the bitcoin core wallet to my computer and move the coins there?

Should I just leave them in their online wallets?

If I move them to a local computer wallet, what do I need to do when bitcoin forks? Do I need to do something to get the same amount of coins in the new chain? (Download a core wallet for the new one so I have bitcoins in both the original and the forked?) (if so how??)


Thankyou all - I don't really care about which chain is the successor etc I just care about being on THE chain and not being left with coins in the wrong place


Thoughts appreciated
Thankyou

I have always advised anyone to stay away from online wallets and exchanges. This is especially true pre-fork.
Bitcoin core is indeed a good desktop wallet, it will have to download and verify the full blockchain tough (this takes time + diskspace). If you want to skip this requirement, an SPV wallet like electrum will do to.

As long as you withdrew all your BTC to a local wallet that allows you to export your private keys (and/or promises to support both chains) before the fork happens, you'll have unspent outputs on both chains. If your desktop wallet doesn't start supporting both chains after the fork, you can export the private keys and import them into a wallet that supports the alternative chain. You do need to watch out for a replay attack tough (transactions on one chain can potentially be replayed on the alternative chain)
3600  Bitcoin / Electrum / Re: Electrum wallet safe to use? on: July 19, 2017, 05:33:41 AM
by the way which Electrum wallet version is quiet for the Bitcoin fork?

I don't really understand the question here... Are you asking what will happen to the electrum users if there will be a lasting fork?
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