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Author Topic: [EMC] EMERCOIN|崛起币 ★ Blockchain Service Platform ★ PoS | PoW | BTC merge-mined  (Read 386077 times)
K1773R
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June 01, 2014, 04:57:06 AM
 #241

Found a solution.

exchange will be semiautomatic.

During the day, the exchanger will collect coins and addresses, and one hour to send to the address on PayPal funds

So, as almost everything is ready, it remains a bit of code change. A couple of days will already!
PayPal will close your account and steal all your funds on it if they find out you traded for cryptocurrencies. it happend enough times in the past.
As example, Inaba/Josh (beside him being a scammer) had on his old pool EclipseMC (sold to BFL) a PayPal payout option. Once PP figured it out, they froze all the funds on the PP account for unlimited time.

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BTC/DVC/TRC/FRC: 1K1773RbXRZVRQSSXe9N6N2MUFERvrdu6y ANC/XPM AK1773RTmRKtvbKBCrUu95UQg5iegrqyeA NMC: NK1773Rzv8b4ugmCgX789PbjewA9fL9Dy1 LTC: LKi773RBuPepQH8E6Zb1ponoCvgbU7hHmd EMC: EK1773RxUes1HX1YAGMZ1xVYBBRUCqfDoF BQC: bK1773R1APJz4yTgRkmdKQhjhiMyQpJgfN
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June 01, 2014, 11:35:38 AM
 #242

I'm looking forward to see what kind of solution will be used. Though, I would use Bitcoin as the backing currency because 1) there are no hassle with fiat payment processors and 2) it helps the cryptocurrency infrastructure.

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June 02, 2014, 04:24:39 PM
 #243

Have about 25k EMER to sell or trade, hit me if interested
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June 02, 2014, 04:27:09 PM
 #244

Have about 25k EMER to sell or trade, hit me if interested


for USD or BTC ?

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June 02, 2014, 07:41:31 PM
 #245

In semi-automatic mode payment would be just a "gift to friend". No cryptocurrecny would be mentioned.

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June 04, 2014, 05:58:25 PM
 #246

We did it!

Semiautomatic exchanger ready.

Exchange Rate 1 EMC = 0.0012 USD

http://olegh.cc.st/cgi-bin/emc-buy.cgi - Exchange your EMC for US dollar (PayPal)!

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June 05, 2014, 06:01:57 AM
 #247

Good news at last!

A semi-automatic exchange has been created - http://olegh.cc.st/cgi-bin/emc-buy.cgi

It is fully functional at the moment. You can use it to exchange your EMC for USD and receive them to your PayPal account.
The lowest possible limit for the exchange course is set at $0.0012 per EMC.
The limits for transactions are:
Minimum transaction amount - $5/day
Maximum transaction amount - $100/day

How it all works:

1) You need to use an e-mail address connected to your PayPal account for receiving the payment.

2) Enter the e-mail in the first field and press the button named "Send E-Mail".

3) A confirmation letter will be sent to the specified e-mail address.

4) Follow the link in the e-mail and you will get a personal EMC address, which will be used to carry out the transaction. You can transfer any amount, but if it is too low, the payment will be delayed until you reach the minimum amount ~4166 EMC ($5). If it is too large (more than 83333 EMC), the payment will be divided into $100 parts paid daily until the total amount is paid out.

5) After the EMC transaction is complete, go to the main page and enter the EMC address to which you have sent the money in the bottom field and press the button. The system will output a table. You need to pay attention to the following rows: Received EMC (how much was sent by you), USD to payoff (total amount to be paid to you by the system), USD will be paid today (how much the system will pay you this day).

That should be all. If you have wishes and suggestions for improvements, we welcome your feedback in the comments.

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June 08, 2014, 09:17:01 AM
Last edit: June 08, 2014, 04:36:42 PM by Fixx
 #248

Since Bitcoin exchange rate grows last two weeks, we decided temporary to increase buyout rate for Emercoin, too.
Right now, you can exchange your Emercoin to USD (paid by paypal) with exchange rate $0.002USD/EMC.
Welcome to http://olegh.cc.st/cgi-bin/emc-buy.cgi

We note, our basic guaranteed buyout rate is not changes, and still $0.0012USD/EMC

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July 15, 2014, 07:28:50 AM
 #249

Exchange rate now is 0.002 US dollars per EMC (http://emc.cc.st/cgi-bin/emc-buy.cgi)

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July 21, 2014, 01:51:12 PM
 #250

Exchange rate now is 0.0025 US dollars per EMC (http://emc.cc.st/cgi-bin/emc-buy.cgi)
Open sale of coins!

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July 27, 2014, 08:12:19 PM
 #251

You can sell your EMC cryptocurrency for US Dollars, paid to any US Bank account via Chase QuickPay. This is free service to send or receive money, if you have e-mail address and US bank account. For details, see FAQ from Chase. Exchange rate is 0.0025 US dollars per EMC.

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August 02, 2014, 07:37:39 PM
 #252

I have 300 coins to sell, can i still sell?
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August 03, 2014, 07:13:48 AM
 #253

I have 300 coins to sell, can i still sell?

No, there is minimal amount is $5 (2000.00 EMC)
You need to get somewhere else 1700 EMC

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August 03, 2014, 10:43:09 AM
 #254

in that case - anyone want it for some good feed back? PM me
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August 06, 2014, 01:33:14 AM
 #255

I have 300 coins to sell, can i still sell?
300 coins with current exchange rate $0.0025/EMC is $0.75 = 75 cents.
This is too small value.
I recommend you to keep them (maybe, exchange rate will goes up), or donate to emerfor project: http://emerfor.org/

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August 11, 2014, 06:38:35 AM
 #256

A new version release v 0.2.2

Advanced dynamic IP protocol STUN added!

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August 11, 2014, 10:28:25 AM
 #257

A new version release v 0.2.2

Advanced dynamic IP protocol STUN added!
Why does Emercoin have STUN? What are you trying to achieve with it?

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August 11, 2014, 01:22:28 PM
Last edit: September 10, 2014, 01:17:49 PM by Fixx
 #258

Why does Emercoin have STUN? What are you trying to achieve with it?

Major improvement:

  For the first time in the history of cryptocurrencies, is used STUN protocol to obtaining an external IP address, instead of WEB-service.

  This problem is already discussed in the cryptocurrency community, for example, here:
http://www.reddit.com/r/Bitcoin/comments/29zx7z/bitcoin_core_uses_showmyip_as_a_centralized_hard/

But, without any positive outcome.

Problem description:

  Bitcoin and it’s descendants (PPC, QRK, etc) – all of them uses same public WEB-server for obtain external IP.
There is two public servers, hardcoded into a wallet program:
- http://checkip.dyndns.org
- http://www.showmyip.com

For source code, see https://github.com/bitcoin/bitcoin/blob/master/src/net.cpp, function GetMyExternalIP()

  What is interesting: 2nd server http://www.showmyip.com is out of service nowadays. So, all Bitcoin and altcoin networks currently
dependent  on single WEB-server: checkip.dyndns.org. If this server will gone, then coin network will not died, but dramatically lost stability.
This will happening, because of peers wouldn't able to advertise  (represent) another peers into network, and peer network
connectivity will be decreased.

  Moreover, current WEB-mechanism for obtain external IP is based on non-standardized human-oriented text protocol.
Therefore, if site owners will modify output format, (for instance, for better reading), then all coin wallets will be unable
to parse and understand answers, and results will be as same as server down.

  In addition, dyndnd.org’s owners able to analyze WEB-server logs, and collect list of IP addresses, where is running coin wallets
and request timestamps, if is not doing this right now (request signature is hardcoded and well known, and easy to distinct).
If we remember, users usually runs wallet just before start some transactions, then we aware:
analyst can correlate wallet start and transaction time, and link it to IP address.
This is serious compromise of coin users anonymity.

Our solution:

  We substituted current non-standard, hard-weight (based on TCP/HTTP) protocol to protocol, based on mature standard RFC3489 (STUN),
designed especially for this purpose. See: http://en.wikipedia.org/wiki/STUN . This is lightweight, UDP-based protocol, used in SIP-based
applications (VOIP, IP-video) for 10+ years. And since it is standardized, we can use unlimited list of  servers for request, and always be
sure: EmerCoin wallet can parse/understand answer from anyone.

  Currently, new EMC-wallet for obtain IP address uses 89 STUN-servers, distributed worldwide, and request sequence is random. Therefore,
nobody can collect significant list if our wallets. Moreover, we performed some steps for randomize signature request, and for server is difficulty
to distinct EMC-wallet request from request, sent by IP phone or softswitch.

  Therefore, we reached our goals: removed dependency from centralized server, increased network stability and provide real  anonymity.

  EmerCoin - cryptocurrency of future. Download/upgrade a new wallet here: http://emercoin.com/downloads/

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August 11, 2014, 02:31:49 PM
 #259

Why does Emercoin have STUN? What are you trying to achieve with it?

Major improvement:

  For the first time in the history of cryptocurrencies, is used STUN protocol to obtaining an external IP address, instead of WEB-service.

  This problem is already discussed in the cryptocurrency community, for example, here:
http://www.reddit.com/r/Bitcoin/comments/29zx7z/bitcoin_core_uses_showmyip_as_a_centralized_hard/

But, without any positive outcome.

Problem description:

  Bitcoin and it’s descendants (PPC, QRK, etc) – all of them uses same public WEB-server for obtain external IP.
There is two public servers, hardcoded into a wallet program:
- http://checkip.dyndns.or
- http://www.showmyip.com

For source code, see https://github.com/bitcoin/bitcoin/blob/master/src/net.cpp, function GetMyExternalIP()

  What is interesting: 2nd server http://www.showmyip.com is out of service nowadays. So, all Bitcoin and altcoin networks currently
dependent  on single WEB-server: checkip.dyndns.org. If this server will gone, then coin network will not died, but dramatically lost stability.
This will happening, because of peers wouldn't able to advertise  (represent) another peers into network, and peer network
connectivity will be decreased.

  Moreover, current WEB-mechanism for obtain external IP is based on non-standardized human-oriented text protocol.
Therefore, if site owners will modify output format, (for instance, for better reading), then all coin wallets will be unable
to parse and understand answers, and results will be as same as server down.

  In addition, dyndnd.org’s owners able to analyze WEB-server logs, and collect list of IP addresses, where is running coin wallets
and request timestamps, if is not doing this right now (request signature is hardcoded and well known, and easy to distinct).
If we remember, users usually runs wallet just before start some transactions, then we aware:
analyst can correlate wallet start and transaction time, and link it to IP address.
This is serious compromise of coin users anonymity.

Our solution:

  We substituted current non-standard, hard-weight (based on TCP/HTTP) protocol to protocol, based on mature standard RFC3489 (STUN),
designed especially for this purpose. See: http://en.wikipedia.org/wiki/STUN . This is lightweight, UDP-based protocol, used in SIP-based
applications (VOIP, IP-video) for 10+ years. And since it is standardized, we can use unlimited list of  servers for request, and always be
sure: EmerCoin wallet can parse/understand answer from anyone.

  Currently, new EMC-wallet for obtain IP address uses 47 STUN-servers, distributed worldwide, and request sequence is random. Therefore,
nobody can collect significant list if our wallets. Moreover, we performed some steps for randomize signature request, and for server is difficulty
to distinct EMC-wallet request from request, sent by IP phone or softswitch.

  Therefore, we reached our goals: removed dependency from centralized server, increased network stability and provide real  anonymity.

  EmerCoin - cryptocurrency of future. Download/upgrade a new wallet here: http://emercoin.com/downloads/
Thats a good idea. First my alarm bells were ringing -> using STUN to bypass NAT restrictions. but if STUN is only used to get the public IP, everytihng is fine Smiley

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BTC/DVC/TRC/FRC: 1K1773RbXRZVRQSSXe9N6N2MUFERvrdu6y ANC/XPM AK1773RTmRKtvbKBCrUu95UQg5iegrqyeA NMC: NK1773Rzv8b4ugmCgX789PbjewA9fL9Dy1 LTC: LKi773RBuPepQH8E6Zb1ponoCvgbU7hHmd EMC: EK1773RxUes1HX1YAGMZ1xVYBBRUCqfDoF BQC: bK1773R1APJz4yTgRkmdKQhjhiMyQpJgfN
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August 11, 2014, 04:39:50 PM
 #260

> Thats a good idea.

Yes, you right.

> First my alarm bells were ringing -> using STUN to bypass NAT restrictions.

You right again.

> but if STUN is only used to get the public IP

STUN is "mirror", located in the public Internet. You looking to a mirror, and see "Who I am".

STUN explains not only external IP address, but also help to consider, which type of NAT device (or chain of NAT devices) you behind.
Unfortunately, NAT does not have standardized masquerading algorithms, and NAT devices from different vendors have different behavior.
For details, see good explanation on CISCO site:
http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_7-3/anatomy.html

In VOIP, NAP problem existing extremely sharp, because of SIP is true p2p network. Therefore, STUN had been designed
primarily for SIP-networks (phones, etc).

> everytihng is fine Smiley

Yes, you right again.

In the EmerCoin, from STUN extracted ExternalIP only, all another info is not retrieved.
And, this is enough for close security breach, inherit from the original BitCoin code.
 
Currently, in the EMC-wallet is collected list of 47 STUN-servers over the world (US, Europe, Russia, Japan, etc).
And request algorithm for each wallet start, uses random "start server position", and pseudorandom "traversal order" for ask server,
and iterate servers, until receive correct answer. Therefore, no any server can collect IPs of EMC-wallets - in the
best case, he can collect 1/47 of wallet list, this information is useless. And, in addition, there is problem for collector to
distinct requests from wallet and requests from SIP-devices.

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