㈠ 虛擬貨幣有哪些
實際上，中國沒有合法的虛擬貨幣。所有的貨幣都是非法的，但是在中國投機並不違法。所謂「正規虛擬貨幣」，無非是更可靠的穩定貨幣，而不是空氣貨幣。目前國內有很多比較靠譜的虛擬貨幣類型，比如山寨幣的鼻祖比特幣，珠寶行業的福元幣，專注於小額獎勵的dogecoin等。，此外還有以太坊，元寶，凱特，誇克，無限，平民等等。但是，雖然虛擬貨幣在中國是合法的，但是打著虛擬貨幣的幌子進行傳銷詐騙是違法的。
中國十大虛擬貨幣
1.比特幣
簡稱:BTC
比特幣誕生於2009年，是一種相對稀缺的虛擬貨幣，所以市場一直保持著良好的走勢，非常具有收藏價值，被很多人認可。
2.以太坊
縮寫:ETH
被稱為「比特幣2.0版」的以太坊(Ethereum)至今仍被廣泛使用，在很多交易平台上都可以買賣。也是近年來非常火爆的虛擬貨幣，增速不錯。
3.比特幣現金
簡稱:BCH
比特幣誕生於2017年。也可以說是新版比特幣虛擬貨幣。它是由少數比特幣開發者發起的，並獲得了全網很多人的支持。它的價值也比較高。
4.貨幣證券貨幣
簡稱:BNB
幣安誕生於2017年，是一種非常受歡迎的虛擬貨幣，在世界范圍內升值非常迅速。它是由硬幣證券交易所發行的。據統計，目前，幣安總量約為3億。
5.博卡硬幣
縮寫:點
在位貨幣誕生於2015年，至今已有6年。它是Polkadot平台發行的平台令牌，近年來在市場上保持上升趨勢。是中國虛擬貨幣排行榜之一。
6.萊特幣
縮寫:LTC
萊特幣誕生於2011年，其創作靈感來源於比特幣。目前萊特幣有著不錯的市場，占據了一定的市場份額，在全球很多國家和地區都相當受歡迎。
7.漣漪貨幣
簡稱:XRP
Ripple誕生於2011年，是Ripple系統唯一的通用貨幣。近幾年非常受歡迎，獲得了很多小商家的支持和認可，也頗具收藏價值。
8.國際開發協會貨幣
縮寫:ADA
阿依達幣誕生於2015年，隸屬於卡爾達諾。其主要特點是交易速度快。據統計，目前有450億枚阿依達幣，市值在本行業處於領先地位。
9.XTZ貨幣
簡稱:XTZ
這種貨幣是2014年正式誕生的一種虛擬貨幣。它是Tezos的縮寫。它在中國仍然很有名，很流行，是中國十大虛擬貨幣之一。
10.鏈接貨幣
縮寫:鏈接
Coin誕生於2017年，全稱Chain LINK，是十大虛擬貨幣排行榜之一。總部在美國舊金山，在國內還是比較有知名度的，有很好的市場價值。
對資金的關注度是評價虛擬貨幣的重要指標。如果比特幣沒有資金的關注，幾年前一萬個比特幣只能買一個披薩。目前要想在幾百種復雜的貨幣中脫穎而出，需要關注一定的資金。
㈡ 什麼是ETB
Economic International Technology簡稱ETB,中文名全球比特聯盟， 為解決現在區塊鏈技術所遇到的問題，2017年五月中旬由全球最大比特幣礦工聯盟發起成立ETB項目組，歷時半年時間ETB通過最頂尖加密技術在繼承比特幣優良特性的基礎上對現存問題進行革新，ETB加密貨幣總發行量2100萬枚，ETB區塊使用現在的線性演算法進行挖礦動作，而是使用仿生的房產網路算力繼承模式，形成一個虛擬貨幣房產網路，我們把每一個賬戶認定為一個ETB，把每一個支付結算應用利用房產末梢的模擬完成最終的支付即時完成。
偉大科技讓原本復雜的世界變得簡單了。久遠的不必贅述，僅數十年來，計算機、互聯網、智能手機等高新技術的紛至沓來，就讓曾經普通人難以想像的事務，譬如全球通信變得現實且簡單了。目前在更為復雜的全球房地產投融資領域，也正在迎來一場走向簡單的變革。這得益於區塊鏈技術的崛起和智能合約的運用，並由ETB平台帶入了現實。
ETB希望，通過基於區塊鏈技術和智能合約運用的投資平台，將全球投資者和房地產項目鏈接起來，並在線直觀的呈現整個房地產項目的一切，從原材料、物流，施工到完工，再到經營和收益等等，讓房地產投資變得透明、易懂、可預測，通過ETB平台，任何投資者都可以投資任何國家的房地產項目，地產商也將可以更直接的面對投資者。
不妨回憶一下我們的日常網購生活：當我們相中某款商品時，都會先將費用支付給交易平台，諸如淘寶或者京東，然後等待商家發貨，在我們確認收到貨物之後，平台再將費用轉交給商家。在這個購物流程中，我們之所以能相信陌生的賣家，是因為我們別無選擇的只能相信交易平台，否則就無法交易。而基於區塊鏈技術就不必如此復雜了，比如在Eit平台，投資者和地產商只需要相信自己的判斷就可以直接互動，Eit需要做的，只是對投資者身份和房地產項目進行嚴格審核，並提供代幣保障平台交易的正常進行就可以了。
如果說昨天，區塊鏈技術的應用還僅限於銀行、證券、基金等少數金融領域，那麼現在，區塊鏈已經開始直接影響普通人的日常生活，ETB房地產投資分散型平台的出現，以及區塊鏈進入建築業，改變了我們對房地產投融資領域的傳統看法，信任與合作已經如此簡單。
比特幣社區作為比特幣技術的研發中心，同時擔負起了引導整個行業技術革新的使命，我們在不斷演進區塊鏈技術的過程中發現，整個行業出現了一些致命的問題!包括比特幣的區塊鏈技術!所以我們從2018年起開始對現在的區塊鏈技術進行革新和迭代，以下內容將詳細的闡述區塊鏈所遇到的問題以及Eit區塊鏈怎麼來解決這些問題，同時公布生命體區塊鏈核心演算法。
問題一：區塊鏈無法真正融入消費場景!
比特幣的長期願景就是對現有貨幣體系進行數字化對接，讓比特幣成為現實貨幣的數字化內核，但是不管是比特幣還是其他的區塊鏈技術都無法真正實現這個目標，至少到現在為止所有的區塊鏈都只具備一個屬性那就是投資屬性，出現這個問題的主要原因其實是技術上的幾個問題，第一，數字貨幣的交易時間，現存的區塊鏈交易技術是無法實現實時交易的，因為在設計之初為了安全和去中心化等問題，我們拋棄了大量時效性的方法。無法實時完成貨幣交割，這是最大的問題!
問題二：區塊遺失!
這個問題是個綜合的問題，部分區塊的遺失一般出現在幾種情況下：
1、賬戶標記遺失
2、礦機標記遺失
3、所有人無有效繼承
這個問題看似很小，但是對於區塊鏈的影響是致命的，因為經過不斷的遺失最終區塊的總量將會越來越少，所以對應的價值將會持續增高，增加的投機者的投資驅動力，對一個區塊鏈的健康長期的發展產生惡性循環，並且讓用戶對整個區塊鏈無法信任。
問題三：去中心化技術運營
比特幣社區就是為了去中心化的技術更新而存在的，但是我們其實無法把真正好的技術更新快速完成因為大部分的冷錢包和礦機要接受這一次迭代更新，技術更新才能完成，比特幣在設計上和公平性上都是沒問題的，但是其實我們忽略了一個重要的問題-延遲性!我們發現想要完成一個技術迭代現在看來幾乎是不可完成的，因為沒有人願意改變，可能這才是我們遇到的最大的問題吧!
Eit的房產網路區塊鏈將會輕松的解決以上問題!
解決方案一：時效消費場景交易
消費場景在Eit的設計中主要分為兩個層次-線上和線下，我們首先改變我們對錢包的認知，生命體的錢包首先是一個網路版本沒有冷錢包的設計，主要就是為了解決交易的時效性。
線上交易：每一個需要支付環節的線上應用都可以對接我們的錢包API，快速完成交易，貨幣交割時間1-3秒。
線下交易：線下支付我們將提供一個類似的API給到支付工具的設計廠商，通過快速開發包，完成線下支付工具的開發，交易時間同樣是1-3秒!
解決方案二：錢包綁定機制
首先我們在考慮一個問題-到底用戶的憑證是什麼?移動互聯網時代，手機就是用戶最時效和准確安全的憑證，我們的錢包設計基於對用戶手機的綁定，通過綁定手機環節不僅可以有效解決賬戶遺失問題，繼承問題同時有效解決!
解決方案三：去中心化的技術
這里為什麼叫技術運營呢!其實技術的更新就是對整個體系的運營，我們在Eit設計了一個投票機制所有的錢包根據一個權重體系完成投票環節，通過權重體系的認定快速強制性完成錢包和礦機算力的更新!
未來已來，希望Eit的引入能夠真正的革新整個區塊鏈行業!
Cloud - referred to as "ETB, Chinese bits of Cloud, to solve the problems now block chain technology, by the world's largest currency in mid-may 2017 miners union launched ETBproject team, lasted six months, ETBby top encryption technology on the basis of succeeding to the good features of the currency of existing problems in innovation, ETBencryption currency a circulation of 21 million pieces, ETBblock using linear algorithm for mining action now, but using bionic property network force inheritance pattern, forming a network of virtual currency property, us to identify each account as a ETB, apply every payment settlement to complete the final payment of housing endings simulation done immediately.
Technology is making great originally complex world becomes simple. No more long, only for decades, the high and new technology such as computer, Internet, smart phones, let ordinary people once unimaginable transactions, such as global communication become reality and simple. At present in the field of more complex global real estate investment and financing, is also usher in a change to the simple. Thanks to block the rise of chain technology and intelligent use of contract, and by the Eit platform into reality.
ETBhope, through technology and intelligent use of investment contract based on block chain platform, link to global investors and real estate projects, and online visual rendering the whole real estate projects, from raw materials, logistics, to the completion of construction, to operation and benefits, etc., let the real estate investment in a transparent and easy to understand, predictable, through the platform of ETB, any investors can invest in real estate projects of any country, developers will also can more directly in the face of investors.
May recall our daily online life: when we phase of a proct, all fees paid to first trading platform, such as taobao or jingdong, and then wait for the businessman shipment, after we confirm receive the goods, the platform to transfer the cost to merchants. In the shopping process, we can believe that the strange sellers, because we have no choice but can only believe that the trading platform, otherwise, cannot trade. And based on block chain technology is not so complicated, in Eit platform, for example, investors and developers only need to believe that your judgment can direct interaction, Eit need to do, just for investors to strict audit status and real estate projects, normal trading platform and provide tokens, guaranteed.
If yesterday, block chain technology application is limited to a few financial sectors such as banking, securities, fund, so now, block chain have begun to directly affect the daily life of ordinary people, the emergence of Eit dispersible in real estate investment platform, as well as the block chain into the construction instry, changed our ideas about traditional in the field of real estate investment and financing, trust and cooperation have been so easy.
As COINS COINS community technology research and development center, at the same time shoulder the mission of the guide the whole instry technology innovation, we are in the process of evolving block chain technology, found that some fatal problems the instry! Including the currency block chain technology! So we started since 2018 to now block chain technology innovation and iteration, the following will be detailed in this paper, the problems and ETB block by block chain chain how to deal with these problems, at the same time announced life block chain core algorithm.
Problem a: block chain can't really into consumption scene!
The currency's long-term vision is digitally docking to the existing monetary system, for the currency to become real currency digital kernel, but whether the currency or other block chain technology can really achieve this goal, at least so far all chain blocks only have an attribute that is investment property, the problem is the main reason of the technology on a few questions, first of all, digital currency trading time, the existing block chain trading technology is unable to realize real-time transaction, because at the beginning of the design for the sake of safety and decentralization, we abandoned the timeliness of the method. Unable to complete real-time delivery, money is the biggest problem!
Problem two: block is lost!
This problem is a comprehensive problem, missing some blocks generally appear in several cases:
1, accounts tag missing
2, mill tag missing
3, all without effective inheritance
This problem seems to be very small, but for the influence of block chain is deadly, because after constantly lost finally the amount of blocks will be less and less, so the corresponding value will continue to increase, increase investment speculators driving force, to the health of a block chain development create a vicious cycle for a long time, and let the user to the whole block chain cannot be trusted.
Question 3: decentralized technology operations
COINS community is to the existence of decentralized technology updates, but we really can't finish the really good technology updated quickly because most of the cold wallet and ore confidential to accept this time iterative update, update technology to complete, the currency on the design and fairness are no problem, but actually we ignored an important part of the problem - the delayed! We found that want to complete a technical iteration now is almost impossible, because no one is willing to change, perhaps this is the biggest problem we met!
ETB property chain network blocks will be easy to solve the above problem!
Solution a: aging consumption trading scene
Consumption scenarios in the design of ETB - online and offline mainly divided into two levels, the first thing we change our cognition to the wallet, purse is first and foremost a network version of the life not cold purse design, main is to solve the timing of the deal.
Online transactions: each link need to be paid for the online application can be docking API, our wallet quickly complete the transaction, currency delivery time 1 to 3 seconds.
Offline payment: offline payment, we will provide a similar API to pay the tool design manufacturers, through rapid development kit, complete offline payment tool development, trading time is also 1-3 seconds!
Solution 2: wallet binding mechanism
First of all we are thinking about a question - what is the end user's credentials? Mobile Internet era, the mobile phone is the most limitation and accurate user security credentials, our wallet design based on the binding of user's phone, through binding mobile phone link not only can effectively solve the problem of account lost, succession and effectively solve!
Solution 3: decentralized technology
Why call technology operations here! Technical update is actually on the system's operation, we have design a voting mechanism in Eit all wallet, according to a weight system to complete the voting link through the weighting system of fast is mandatory to complete the wallet and mining machine force update!
Future has come, in the hope that the introction of the Eit can truly the innovation of the whole block chain instry!
㈢ 對於go版的以太坊，有哪位大神指導，裡面的一個方法：GetStorageAt是幹嘛用的么
這是以太坊提供的一個可以讀取區塊鏈賬本中數據的介面，參數依次表示所要讀取存儲的賬戶地址、存儲相對索引位置、以及區塊號。可以參見web3.eth.getStorageAt介面以及以太坊ethapi/api.go對應的GetStorageAt函數。
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