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41  Economy / Computer hardware / WTB FPGA miner on: May 30, 2014, 03:07:58 AM
I'd like to buy a FPGA miner, at least two spartan 6 or higher.
If you have one to sell, please PM your price. I am based in US.
Thanks.
42  Local / 跳蚤市场 / Re: 【求购】二手FPGA矿机 on: May 29, 2014, 01:38:45 PM
我拿矿机FPGA板子用来做别的设计,不是挖BTC。
现在用FPGA挖BTC,电费都回不来。价格好商量,想出的给我私信联系
43  Local / 跳蚤市场 / 【求购】二手FPGA矿机 on: May 29, 2014, 01:35:06 AM
要求至少两个spartan 6 FPGA以上版本,请和我联系。
多谢
44  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][RIC] Riecoin, new prime numbers POW coin, launches Feb 11, 2014 on: February 10, 2014, 04:32:56 PM
will we have a pool at the launch time?

or mine through wallet? thanks dev team!
According to gatra, p2pool will be ready later, but not at launch time.
Solo only but there will be optimized cpuminer available.
45  Local / 山寨币 / Re: [ANN][RIC] 黎曼币, 新的基于素数POW虚拟币, 将于Feb 11, 2014发布 on: February 09, 2014, 06:54:30 PM
支持一下,有创新的币
46  Local / 山寨币 / Re: [ANN]Nxt :: descendant of Bitcoin又出新币啦 on: November 26, 2013, 09:15:30 PM
请看下面的发布文章翻译
https://bitcointalk.org/index.php?topic=347956.0
47  Alternate cryptocurrencies / Altcoin Discussion / Re: [BOUNTY] Announcements for Nxt (the first pure POS coin) on: November 26, 2013, 08:38:59 PM
Nxt :: descendant of Bitcoin: https://bitcointalk.org/index.php?topic=303898.0 is the first pure POS coin and was launched yesterday 24/11/2013.
Nxt uses brand new software, it’s not a fork of Bitcoin source code.  Nxt improves different features of Bitcoin, removes some disadvantages (e.g. bloated blockchain) and resolves a big environmental issue. Mining is 100% proof-of-stake, Coins are earned solely by charging transaction fees.
Time between blocks is one minute. Also the colored coin feature for p2p security exchange has been natively coded in a decentralized format into the Nxt platform and will come along in a few days too!
This thread is opened by me (a Nxt stake-holder) to inform and project the state of available bounties supplied by stake-holders donations, to get some projects done by the community in a competitive rewarding manner. Each bounty has an initial deadline but the period could be prolonged if it seem necessary. I created this thread as a self-moderated one, to keep the focus on the bounty projects. If you have some critiques or would like to discuss the Nxt project in general, you can head over to the main thread mentioned above or open a new thread of your own and do it there!
Thanks for Reading Smiley
Please see the Chinese version of launch announcement as below:
https://bitcointalk.org/index.php?topic=347956.msg3726507#msg3726507
48  Local / 山寨币 / [ANN]Nxt:BitCoin的子项目 on: November 26, 2013, 08:37:50 PM
此为Nxt的原始发布文章的中文翻译,原文在https://bitcointalk.org/index.php?topic=303898.0
注意:译者并不对该项目发表评论,请自行判断其可靠性,以下为译文:

我现在很荣幸宣传Nxt (发音为 "next"), 一种基于BitCoin思想的虚拟货币.

Nxt使用全新的软件,并不是BitCoin源代码的克隆。Nxt 改善了BitCoin的很多特性,去除了一些不足 (e.g. 臃肿的 blockchain)并且解决了环境问题. 我不会讲太多废话,让我们直接跳到重点.

虚拟币只能通过收交易费用获得.
Nxt中所有币将通过从BitCoin的blockchain转账出现。并非所有的BitCoin都会被转账,所以币的总量未知。
1分钟一个block.虽然这会增加孤块,但是对用户很方便
Nxt并不适用所谓的"scripts". 这简化并且加快了交易处理。类似multsig的高级特性将在第三方中出现。
挖矿是100%纯proof of stake。绿色环保。

当前软件的开发还未完成。由于正在进行中,我们应该开始转账过程来决定谁以及获得多少币。这通过向我自己的地址发送一个小额BTC来决定。我想大部分人看到这都会想,终于抓到你了。慢着,我并不是让你发送成千上万的USD,只需要几个satoshis就够了。交易必须付一个留言。这可以通过blockchain.info来完成。消息必须仅仅包含SHA256 Hash,这个将被用来发送币。所有这些币将被放入我要发行币的genesis block中。任何人都可以确认第0块仅仅包含数量合理的币,而并不存在偷挖。

因此,如果你想获得币,你需要做下面的事情:
1.  选择一个密码
2.  计算这个密码的SHA256 hash (可以通过在线计算器获得)
3.  再次计算你上面获得的hash的SHA256 hash
4.  发送任意数量的BTC到1BCN1ugdKdWd9pQ8Am9hMhtHZfmbXzxE8a, 不要忘记附上一个留言加入你在第三步中得到的hash值。 (最大数额是 1 BTC!)

这就完了. 当Nxt发行的时候你将 获得一部分新的币,你所获得币数量正比于你发送的数额。

我正在努力工作来尽快发布Nxt.  我将完成所有必要的东西,但是一些额外的工作也要完成。  我正在考虑开发一个网站接口以及一些其他比较酷的东西。请捐助我们来加快开发进度125EJ3HYXNZ8swr2UBcvKNBV2voAYACFu9.

P.S.  我是这个论坛的老ID了。我使用新的ID来保持匿名性,但是之后我会结露我的身份。

P.P.S. 在Genesis block生成后你并不能再次发送BTC到NXT


我得到了一些帮助,在发布后我将提供下面的服务:

1]  Faucet.  由捐赠来支持。
2]  Currency exchange.  传统的BTC-to-NXT双向兑换
3]  Stock exchange.  如果我理解正确的话,这将是一个简化版本,可以用于众筹
4]  Virtual goods store.  货物由普通用户提供 (书,游戏码,任何可以用文本表示的东西)



接口正在开发中,但是你可以看下面的测试页面 http://88.198.210.245:7875
49  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][Datacoin] Datacoin blockchain start announcement (just launched) on: November 25, 2013, 09:55:00 PM
i don't really know these exchanges...what about bter? any issues with it?
one of best choices for DTC
50  Local / 山寨币 / Re: [ANN][Datacoin] Datacoin 刚刚发布(基于PrimeCoin) on: November 25, 2013, 09:45:27 PM
bter已经增加datacoin交易:
https://bter.com/trade/DTC_btc
https://bter.com/trade/DTC_cny
欢迎大家捐赠我DP3btUHEcmsjsyNYv6Ked1z2V9RfVrcrAF
51  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][Datacoin] Datacoin blockchain start announcement (just launched) on: November 25, 2013, 09:39:19 PM
You are so fast, cause I was just writing you a message...
52  Local / 山寨币 / Re: [ANN][Datacoin] Datacoin 刚刚发布(基于PrimeCoin) on: November 23, 2013, 05:46:34 PM
Quote
仅仅是一个克隆,基本上没太多新内容。
那挖它还有什么意思
这只是作者自谦的说法,其实这个算是最近比较有创新的虚拟币
53  Alternate cryptocurrencies / Altcoin Discussion / Re: Presenting Datacoin to Chinese section! Rewarding translators on: November 22, 2013, 05:27:23 PM
Datacoin should be presented to wide Chinese audience, they always worry about Internet censorship, so storage feature of this coin may interest Chinese. If you translate OP post in Datacoin topic and post it into Chinese section, you'll get a reward in Datacoins!  Smiley
Hi, please see https://bitcointalk.org/index.php?topic=342713.msg3670353#msg3670353
My DataCoin address is DP3btUHEcmsjsyNYv6Ked1z2V9RfVrcrAF

hey, thanks a lot! I'll send you several hundreds in a hour or two.
Chinese should understand the unique feature of Datacoin - it's not just another coin that copies XPM, it adds very interesting possibilities for developers of anonymous soft.

datacoins sent to you Smiley
Thanks a lot for your donation~
54  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][Datacoin] Datacoin blockchain start announcement (just launched) on: November 22, 2013, 03:05:50 AM
I have just translated the DataCoin launch into Chinese, and please see below:
https://bitcointalk.org/index.php?topic=342713.0
Donations are welcome to DP3btUHEcmsjsyNYv6Ked1z2V9RfVrcrAF
55  Alternate cryptocurrencies / Altcoin Discussion / Re: Presenting Datacoin to Chinese section! Rewarding translators on: November 22, 2013, 02:50:33 AM
Datacoin should be presented to wide Chinese audience, they always worry about Internet censorship, so storage feature of this coin may interest Chinese. If you translate OP post in Datacoin topic and post it into Chinese section, you'll get a reward in Datacoins!  Smiley
Hi, please see https://bitcointalk.org/index.php?topic=342713.msg3670353#msg3670353
My DataCoin address is DP3btUHEcmsjsyNYv6Ked1z2V9RfVrcrAF
56  Local / 山寨币 / [ANN][Datacoin] Datacoin 刚刚发布(基于PrimeCoin)已经登陆bter on: November 22, 2013, 02:49:23 AM
这是DataCoin发布贴的中文翻译,英文发布在https://bitcointalk.org/index.php?topic=325735.0
如果你挖到了DataCoin,请捐助我DP3btUHEcmsjsyNYv6Ked1z2V9RfVrcrAF
bter已经增加datacoin交易:
https://bter.com/trade/DTC_btc
https://bter.com/trade/DTC_cny
Hi!

这是一个实验性的虚拟货币(仅仅是一个克隆,基本上没太多新内容)译者注:这只是作者自谦的说法,事实上Datacoin基于PrimeCoin,并且可以存储数据,非常有新意
下面是一些技术细节:

- Datacoin 是PrimeCoin的克隆,采用相同的POW方法

- 在所有交易中添加了二进制数据字段. 数据字段大小限制为 128Kb. 每个Block的大小限制为1Mb.
Code:
    unsigned int nLockTime;
+    std::vector<unsigned char> data;

- 添加了senddata RPC 方法: 它创建一个携带数据的tx,并且找零. 下面的例子显示了如何保存一个bzip2压缩文件到blockchain. senddata方法要求base64编码数据作为参数。senddata方法成功后将打印txid.

Code:
bzip2 -c -9 filename.txt | base64 -w 0 | xargs -I XX datacoind senddata XX

- getdata RPC 方法稍后将会添加. 下面的命令可以从blockchain获取数据,而不是通过RPC方法:

Code:
 datacoind getrawtransaction TXID | xargs -I XX datacoind decoderawtransaction XX | grep -E '"data"' | grep -E -o ': ".*"' | sed -E 's/[": ]//g' | base64 -d | bzip2 -d > filename2.txt

- MIN_TX_FEE设置成0.05 (Primecoin value is 0.01) => 每个Block将有51.2币作为奖励.

Datacoin主要用来不被审查的数据存储和支付存储费用的方式. 转账并不是Datacoin的第一目的。

Data 将被永远存储在blockchain (只要blockchain还存在) 并且可以通过tx hash来作为识别符获取. 我将它看过一个应用程序存储数据的平台,而不是直接用户访问: torrent服务器,加密消息服务等等.. 我不认为blockchain是一个能存储类似视频文件等海量数据的地方,因为成本太高了。因此我建议存储种子文件,整数,可能一些HTML页面和其他类似的东西。

由于Datacoin是一种存储,因此blockchain将会非常巨大。一年后blockchain最大将会是 1Mb * 60 mins * 24 hours * 365 days = 513.28 Gb

不带数据的交易也被支持 Wink

在blockchain中没有办法存储文件名或者文件类型. 文件名和类型将由上层协议来进行处理。

Datacoin blockchain发布于: Nov 17, 13:15 GMT. 其他信息在发布前一个小时公布。
Blockchain将仅仅包含genesis block并且初始难度将相对高.

Code:
https://github.com/foo1inge/datacoin - Primecoin fork 带有 data in tx及 相应的 RPC (暂时没用,因为没人有Datacoin支付费用).
https://github.com/foo1inge/datacoin-hp - Primecoin-hp 克隆 (没有RPC ... 稍候发布). 你应该只用这个进行挖矿,因为比较快.

Scripts
https://github.com/foo1inge/datacoin-browser - Perl 脚本用来向blockchain发布和获取文件.
注1: 请使用前确定理解自己在做什么. 请在使用前查看下脚本(非常严肃的).
注2: 直到datacoin-hp更新前,你需要non-hp版本.

Binary
Datacoin-hp Windows binary: https://sourceforge.net/projects/datacoin/files/.
Linux 用户必须自己编译: 这将更加安全并且性能更高. 请参阅Primcoin编译指南 (libgmp for -hp version).

注意: 在使用前请备份任何重要文件 (比如, Primecoin wallet). 我已经更改过路径等信息,但你仍然应该小心
57  Alternate cryptocurrencies / Altcoin Discussion / Re: How to fix 0/unconfirmed transaction? on: November 21, 2013, 04:48:16 PM
I sent some primecoins to one of my another address, and it got stuck with 0/unconfirmed issue. It has been almost three months and it is still there. I have tried to start the wallet with rescan but it does not work. How could I fix this and get my coins back? Thanks a lot.

search pywallet, has resolved this type of thing for me in the past
Thanks for your reply, and I have downloaded pywallet, but it said wallet data not recognized. I guess this is because primecoin is different from bitcoin, and it does not recognize it.
Could you tell me what you do with pywallet? dump the private key of sending address and import in to another new wallet? Do I need to dump the transactions?
Thanks a lot for your help.
58  Alternate cryptocurrencies / Altcoin Discussion / How to fix 0/unconfirmed transaction? on: November 21, 2013, 12:06:41 AM
I sent some primecoins to one of my another address, and it got stuck with 0/unconfirmed issue. It has been almost three months and it is still there. I have tried to start the wallet with rescan but it does not work. How could I fix this and get my coins back? Thanks a lot.
59  Alternate cryptocurrencies / Altcoin Discussion / [YAC]POS causes POW orphan issue on: November 19, 2013, 04:19:31 PM
In ZcCoin, I found that the POS will cause lots of orphans in POW periodically. ZcCoin is based on YaCoin, and is there any similar issues in YAC?
The problem is that even though the POW block has been confirmed for more than 520 times, it will still become orphan when the POS comes out. Any idea how to solve this problem, or is there any similar problem in YaCoin? Thanks.
60  Alternate cryptocurrencies / Altcoin Discussion / Re: Any p2pool modification tutorial/help for altcoins? on: July 28, 2013, 04:29:38 AM
Does the p2pool for alt coin change the donation address? I am wondering that the original donation address only works for BTC, right?
Do we need to change the donation address to a new correct address for new coin?
Any comments on this? Thanks a lot.
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