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1
Imagine a way to expand bitcoin payments to millions per second. Now, imagine a clunky, command-line interface.

That's the extent of the divide between the vision enabled by bitcoin's best-yet scaling solution, the lightning network, and the current state of its design. But while that's daunting, developers are moving ahead on designs to make the payment system easier to use, with one recently submitting a proposal for connecting lightning with a payment technology that could make it feel as futuristic as it's touted.

That payment technology, near-field communication, or NFC, would allow a user to pay for an item just by holding their smartphone an inch away from the device it's paying.

Not a new idea in bitcoin or the payments world at large, NFC-based payments have caught on throughout Asia and Europe - not only on smartphones, but also through chips embedded in payment cards. And while the U.S. might be lagging behind in NFC adoption, bitcoin's early adopters might just be the right target audience.

As such, the proposal, submitted by developer Igor Cota, looks to standardize a way to connect lightning with NFC.

Invoking the name of his lightning wallet that uses NFC, Presto, Cota told CoinDesk:

"I want the payments to be instant just like with the contactless cards we have here in Europe. A user would simply tap on the payment terminal and presto!"

Further, Cota imagines turning any computer into a lightning point-of-sale terminal through the use of a $29 USB attachment, a route that has proven successful in his early tests.

Replacing QR codes

Given the success, Cota's proposal is about standardizing what he's created, adding it to the many other standard rules that describe how each lightning software implementation should operate.

Many bitcoin payments implementations tend to use QR codes - those pixelated-looking black-and-white squares that encode data that can then be scanned and consumed by smartphones. And while Presto supports QR codes alongside NFC, he believes the latter provides a much better experience.

QR codes not only can be a bit finicky, but they also can become "unwieldy," Cota said, especially when more information is added to them. In this way, merchants won't be able to add much information such as itemized receipts and coupons to QR codes, he said.

NFC, though, doesn't have this hurdle.

"I'd like to see a system where the payment terminal sends a nice HTML receipt for the customer - that receipt has, say, a table list of your grocery shopping with subtotal, taxes, grand-total, perhaps a shop logo, some loyalty code or a coupon for future use," he said.

In Cota's mind, this would give consumers a more detailed record of their spending habits, empowering them to take even more control of their finances.

"Imagine a wallet that can tell you how much you've spent on broccoli last month?" Cota said, adding:

"With crypto you're always in control, but with these digital receipts you are even more so."

A bolt of lightning

But first, Cota is trying to get his NFC implementation added to the standards that lightning network developers have established in an effort to make sure all implementations are compatible with each other.

These standards are called "BOLTS," and Cota believes NFC should be added to BOLT 11, which explains how "invoices" - describing how much a person owes - should be encoded and presented to a user. It's a similar process to that of the credit card reader at Starbucks showing you that you owe $4.50 for a mocha latte.

For now, BOLT 11 only describes a standard for QR codes.

Already, Cota has come up with a rough standard, putting together a Multipurpose Internet Mail Extensions (MIME) type, which is a format for sending data; an NFC application ID, which indicates the payment method is lightning; and a "very simple protocol to forward socket data."

Though these pieces weren't so hard to come up with, Cota said he thinks it's important to write up a standard, whereby all NFC-enabled point-of-sale devices can accept any NFC-based lightning payment, now to be ahead of the game should NFC-based lightning payments take off.

"For the sake of interoperability, it would be great if we agreed on some standards," he explained.

And already, most of the public technical feedback has been positive, with Lightning developers ZmnSCPxj and Cornι Plooy responding favorably to the proposal on the mailing list.

However, Bitrefill lightning developer Justin Camarena was a bit wishy-washy, telling CoinDesk:

"It's an obvious way to pay in the future but it seems we're a bit too early as there are no hardware point-of-sales offering lightning support."

Still, Cota is plugging away on the next steps to move the project forward.

"As you can see the [Presto user-interface] is not really there yet but I'm working on it," he said, adding, "What I'm working on at the moment is a protocol that makes sure the NFC payment goes through even in case the paying device is offline."

Cota plans to submit another pull request for developers to review once this mechanism is finished.

2
Airdrops & Giveaways [FREE] / CryptonsGame airdrop 2 QST
« on: April 15, 2018, 02:04:26 AM »
CryptonsGame airdrop 2 QST
1.Click this link and fill in the google form
2.Join the telegram group and enter your telegram username, email address and ether wallet address

3
空投信息发布 / CryptonsGame空投2个QST
« on: April 15, 2018, 02:03:04 AM »
CryptonsGame空投2个QST
点击进入  空投地址  ,填写google表单
加入电报群,输入你的电报用户名,邮箱和以太钱包地址

4
Etoro公司的高级市场分析师马蒂•格林斯潘(Mati Greenspan)说,华尔街正准备向比特币注入“新的流动性”,这正是市场所期待的。

格林斯潘在接受彭博社(Bloomberg)采访时谈到了围绕比特币市场及其面临的一些问题,以及比特币作为支付手段等相关的主题。他站在机构的角度谈到了一些见解,提到“注入的流动性越多,加密货币市场就越好”,他指出华尔街正跃跃欲试,准备“参与进来”。

“正如我们所谈到的,他们正在搭建通往比特币的桥梁。我们不知道他们是否会全力做多还是做空。但最重要的是,他们已经准备好接受比特币并向这个市场注入新的流动性,至少应该能稳定市场和价格。”
他指出,尽管华尔街曾尝试过这样做,但去年他们“错过了”加密货币的“盛宴”,芝加哥期权交易所(CBOE)和芝加哥商品交易所(CME)在比特币价格达到“峰值”时推出了比特币期货。Etoro公司观察到,去年11月份,希望开设账户并涉足比特币交易的客户数量有所上升。

格林斯潘说比特币价格的“下跌”已“不是什么新鲜事”,他指出,从下跌幅度和下跌历史来看,“我们以前见过这种类型的下跌。”的确,一个很好的例子就是比特币的价格在2013年连续几个月的时间里下跌了70%,后来快速飙升,超过了其他类别的资产。

在格林斯潘被问及比特币期货在金融体系的角色是什么,以及各国央行是否会支持加密货币时,他回答说比特币去中心化的属性让其运行“独立于各国央行之外,并完全靠大众和用户的力量。”

 

比特币支付
 

随着对比特币、比特币现金和闪电网络的激烈争论,比特币作为一种支付手段正开始起步。例如,比特币在最早期的交易几乎是即时的,费用也很合理。

格林斯潘指出,2017年12月和1月对比特币的需求不断上升,触发了“网络堵塞”,导致交易成本上升。现在,随着价格的回落和需求的减少,比特币将正向正轨。他补充说,进入市场的流动性越多,市场就越好。

Etoro是一家全球贸易和投资平台,去年开始支持近六种加密货币交易,包括比特币、以太币、以太经典、莱特币和瑞波币。他们的平台旨在“简化”加密货币的交易和投资流程。

格林斯潘最近以将近10%的损失结束了一单比特币现金的交易,但他在Etoro网站上说:

“我的投资组合里有很多加密货币。只是清仓部分比特币现金用于其他投资。”

5
互联网都被数字货币的奇迹震惊了。它被认为是世界的未来,区块链会改变我们的生活。

虽然区块链和其他分布式账本技术会有很多应用,但是如果它看成一个解决方案其实是有很多问题的 — 你假设总是有分布式账本技术可以解决的问题。

http://kongtou.top/uploads/allimg/180412/1-1P41215161X06.png

数字货币的热爱者会在这让我停下,然后说数字货币可以解决很多问题啊。信任,中心化,安全等等。数字货币可以作为通用货币。我想问的是:如果现在有这个问题,没有数字货币就没办法解决了吗?

有一组科学家在研究不同的化学物质时,发现了一种危险的有效配方。 他们开始研究这个要怎么使用以及谁会去使用呢,最终发现了它的一个使用方法 — 可以作为鼠毒,去杀死害虫。然后,他们开始寻找控制害虫的公司来售卖他们的产品。

在世界的另一端, 有一个严重的鼠患问题,当地政府正在寻找解除害虫的方法。他们寻找了很多方法– 鼠毒,陷阱,用猫,以及发放补鼠奖励。

这群科学家将他们的想法告诉政府,但是最后没有成功。最终根据经济,环境和实践原因,提出安装扑鼠陷阱的解决方案。

很多数字货币的问题就在于他们就像这群科学家,在寻找可以实际应用的方法。他们在寻找解决问题的方法,希望以全新,改革的技术来改变世界。

另一方面,如果我们看成功的初创企业,他们通常是从需求中提出解决方案。也就是说,确实存在问题和缺陷,有解决这个问题的需求。因此,这些初创公司的创始人发起项目来解决他们的痛点。

 

缺乏信任是个问题
 

eBay和阿里巴巴通过代管支付解决了平台上买家和卖家之间的信任问题。由于信任服务,你需要付一定的转账服务费。这些是不用区块链能够解决信任问题的方案。

毫无疑问,区块链可以解决信任问题,而且不需要中心化机构的背书,但是也许这过度安全了。但是事实上是现在的情况却开启了全新的问题:

1.区块链不能扩容
2. 转账容量很小,而且转账费用很高
3. 发送到错误地址的话,还会有安全问题
4. 挖矿花费很多的能源

我们都有信心这些问题会最终被解决,这也是为什么分布式账本会一直流行下去的原因。区块链会是达到目的的手段,这个目的代表了一种新的转账和运作方式。

我的疑惑在于很多所谓想要理解区块链技术以及应用到产业的公司,都是从问题开始,而不是解决方案。你可以在不用区块链和智能合约的方式下解决这个问题吗?

6
本周三,瑞波表示将向区块链风投Blockchain Capital投资价值2500万美元的瑞波币(XRP)用于早期投资,以鼓励使用其技术构建的下一个伟大的技术应用程序。Blockchain Capital是一家专注于区块链技术的风险投资公司。



瑞波的目标是资助能够为该公司的区块链技术找到更多用例的“聪明”的企业家们。瑞波首席市执行官Cory Johnson周三在接受CNBC采访时:

我们需要可以用XRP解决问题的聪明的人才和企业家,我们已为他们准备好了投资基金。
截至目前,瑞波的技术主要应用于银行的即时交易结算。该公司已宣布与美国汇款巨头速汇金(MoneyGram)、西联汇款(Western Union)、全球支付巨头美国运通(AmericanExpress)、桑坦德银行等公司建立合作伙伴关系。Cory Johnson说:

很多人都会用XRP开发一些应用,并且因为它位于我们的资产负债表上,所以从估值的角度来看,这对我们来说是很有帮助的。如果有人使用XRP启动下一个优步、社交应用Instagram或云计算巨头Salesforce,那就更棒了。
Blockchain Capital本次接受的是瑞波币的投资,而不是美元。但约翰逊表示,该公司并不打算将所有瑞波币用于投资,与瑞波的区域资产相比相比,这2500万美元是微不足道的。Cory Johnson补充说:“我们有长期打算将瑞波币作为捐赠的主要方式,这仅仅只是开始。”

瑞波的首席执行官Brad Garlinghouse也表示有兴趣投资其他公司,并于3月份告诉媒体TechCrunch,该公司希望投资更多使用瑞波币的初创公司。

7
如果说Jamie Dimon之前不相信因果报应的话,现在他应该信了。

摩根大通(JPMorgan)因在并未提前通知的情况下向加密货币投资者收取额外费用以及利息而面临集体诉讼。怪不得我们需要去中心化的改革了。



今年年初,该银行禁止用信用卡购买加密货币,当时其以预借现金的形式处理加密货币买单的方式也引起了不小的争议,因为这种方式需要付出更高的费用。摩根大通CEO Jamie Dimon曾称比特币是欺诈,而如今欺诈这一点却在他自己身上应验了。

原告Brady Tucker表示,与信用卡支付相比,通过预借现金的方式购买加密货币,摩根大通会收取额外的费用以及更高的利息。摩根大通的客户表示抗议,而这家银行却无动于衷。

摩根大通某发言人说,该银行已经禁止信用卡购买比特币和其他竞争币,因为“存在信用风险”。然而,他指出,用户依然可以通过与他们活期账户关联的借记卡来购买加密货币以避免支付额外的费用。摩根大通不是唯一一家禁止信用卡购买比特币的银行,从今年开始,美国银行和花旗银行等大型银行都采取了同样的措施。

与此同时,原告在被收取额外费用之后开始反击,包括超过140美元的费用以及20美元的利息。

据诉讼书,有数百甚至上千位摩根大通客户同样被收取了额外的费用。

在决定发起诉讼之前,Tucker联系了摩根大通的客服,要求他们返还这笔费用,但却无功而返。

Tucker的代表律师表示摩根大通违反了《借贷信用法》,该法案用于保护消费者免受不公正的信用卡操作的影响。法案要求金融机构必须以书面形式通知客户任何有关于条款变更的信息。

这场诉讼案要求摩根大通赔偿100万美元。

8
一些以加密货币闻名的公司也在努力证明自己在卓有成效地做区块链业务。
在美国时间4月9日举办的LendIt朗迪峰会上,瑞波币(Ripple)创始人Chris Larsen表示,加密货币只是区块链中很小的领域,虽然ICO(首次代币发行)受到政府部门的质疑,但是以后也要谋求区块链的合理市场地位。
Chris Larsen在主旨演讲中表示:“加密货币只是区块链很小的领域。就区块链的泛应用而言,可能会把整个世界货币和账本的传统市场进行更好的创新和融合。”
Chris Larsen在会上说,瑞波币与米兰达·盖茨基金会的合作的120亿美金基金中,就有一部分用在普惠金融。他表示,目前全球20亿人都没有融入现代货币交易体系,很多国家和地区的经济互不联通,甚至是日本这些相对发达的国家,而瑞波币会帮助政府去跨域这一步。”
至于全球都在质疑的ICO问题,Chris Larsen也意识到ICO不是一个很有益于公司的概念,也受到SEC(美国证券交易委员会)的监管,“不过慢慢地,从市场到监管也逐步发现了它的价值,区块链的应用不但能够降低资金交易的成本,也能够用于物联网等领域,降低交易成本能够大幅下降。不过但很多银行和金融机构没有意识到这点。到了一定的时候,我们也需要谋求自己合理的市场地位。”
根据coinmarketcap数据,瑞波币目前已经是全球市值第三的加密货币,总值为191亿美元,差不多是比特币的六分之一。Chris Larsen在2018年2月以335亿元成为胡润富豪榜区块链首富,福布斯评选他为加密货币行业最富有的人,估计其身家在75亿美元至80亿美元之间。
瑞波币近半年的价格走势可谓惊心动魄。在2018年1月,瑞波币一度涨到20元人民币以上,然而截止到发稿前,已经回归到3.138元人民币,是之前最高峰的1/7。

9
区块链的话题热度随着比特币价格这两年火箭般的走势居高不下,在博鳌亚洲论坛现场,分论坛“再谈区块链”现场座无虚席。
央行参事盛松成在分论坛上直言:“如果区块链主要放在虚拟货币方面,我觉得区块链是不会有前途的。”
盛松成分析,区块链是一门技术,比特币是虚拟货币,只是区块链的一种应用, 因为虚拟货币本身不是货币。经济调控主要靠财政货币和货币政策,货币政策要靠国家控制货币的发行权,这就是法定货币。如果虚拟货币泛滥是法定货币,货币政策是无法执行的。所以区块链不要用到货币方面,这是没有前途的。
除此之外,盛松成还建议,区块链不要用在金融方面,因为现在实际上传统的金融的支付系统,已经基本上能满足日常支付的需要,区块链技术用到金融支付上效率反而低;而反洗钱、反偷税漏税的功能银行卡之类都已经实现了。
对于区块链的发展,盛松成认为,要真正为实体经济服务,要把区块链应用到实际场景中,而不是从货币去谈区块链。如果在这一方面可以做成,法律、制度、技术都将不是障碍。

10
Airdrops & Giveaways [FREE] / Bit.Game airdrop 100 BGC
« on: April 11, 2018, 01:22:09 AM »
Bit.Game airdrop 100 BGC
1.Click this link, Enter Ether Wallet Address
2.Join the telegram group https://t.me/BIT_GAME_PROJECT and enter your verification code

11
空投信息发布 / Bit.Game空投100个BGC
« on: April 11, 2018, 01:20:26 AM »
Bit.Game空投100个BGC
点击进入  空投地址  输入以太钱包地址
加入电报群 https://t.me/BIT_GAME_PROJECT  ,输入你的验证码

12
Project Development / A new type of consensus protocol
« on: April 10, 2018, 09:31:15 AM »
Hi every one:

Here is a new type of consensus protocol that might help resolve some

common problems of POW and POS:

https://github.com/yj1190590/POnD/blob/master/README_eng.md

And there are some draft project plans based on the protocol.

I want to share them with you and hope to find someone interested.

Anyone who has any question, please let me know. Thanks!

13
Was reading this: hackingdistributed.com/2017/02/23/green-blockchains#piecework-recycling-pows

And this looks like a good idea. Under messages or bandwidth flooding, requiring some PoW for simple message passing helps.
One way to have that is to recycle mining. On the other hand, mining tends to be, even if inneficient, maxed out (have higher hashrate than otherwise).

Assume a standard node Std, and a low-end, average joe node Joe. If Joe can afford to do _any_ tx validation, he does; if he can't, he doesn't--just go with the coinbase. Then Joe and Std trade bitcoin addresses public keys, such that: 
**Ja** -> _JA_ {**Ja** is Joe's private key, _JA_ is it's public key} 
**Sa** -> _SA_ {**Sa** is Std's private key, and so on..} 

Then Joe grabs _SA_ and uses it as a private key **Ja'**, so: 
**Ja'** -> _JA'_ {so that "private key" has it's own public key} 
and then: 
**Jb** = **Ja** + **Ja'** {Joe sums his and "his other" private key (on Std's knowledge), getting a new private key} 
**Jb** -> _JB_ {and that has a public key} 
_JB_ = _JA_ + _JA'_ {and such public key is also the sum of _JA_ and _JA'_; learned about this magic from mimblewimble} 

Then Joe may mine and target the coinbase to an address that comes from _JB_. Even if he doesn't mine in time, he keeps mining it, until he gets enought PoW required by Std. Or, he still keeps his best PoW form each mining round, and stashes it, until it's enought PoW as a folded sum of PoW iterations. Also, if he has many connected peers, he may spend each mining round to one of his peers (since each would have a different _SA_ or **Ja'**).

Assuming Joe fails to mine in time, he can still announce Std that round's header, with his best work proof. Since Std has _SA_ or **Ja'**, he also has _JA'_. If they exchanged both _JA_ and _SA_ among each other, Std may verify that _JB_ is indeed _JA_ + _SA_, so it was indeed a work trying to prove to Std (to himself). 
Joe still has **Jb**, whereas Std doesn't, so Joe's rewards should be safe if he actually mines it. 

So each node may track the peers "dedicated" Proof of Work, recycled from mining, as an anti-spam measure.

14
Mining / Individual versus Group Mining - why different block rates?
« on: April 10, 2018, 08:59:43 AM »
I have been mining for a few months.  I have tried many mining pools.  It seems to me that I find blocks easily in mining pools where finding blocks is not rewarded, but not at all where blocks are rewarded.  At nice hash I am consistently finding at least 4 blocks per week, often as high as 8.  But I have tried pools where such accomplishment is rewarded, ran the miner a week at a time, and I just ended up with zilk in my wallet.    If I would be rewarded for my 4 - 8 blocks at the rate said to be the reward for such accomplishment at the private mining pools, I would do quite well financially.  But I don't Cry.  There is mischief in this Angry!  There has to be.  Someone help decode it.

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