Pro test to the center of the IDEX exchange, really do not fit with white

Editor’s note: a lot of people understand to the center of the exchange, only on the concept of cognitive. Therefore, this article will through the author’s own experience, to show the reader the most real exchange traded to the center of the scene.

Author Qin Xiaofeng |

| editor Lu Xiaoming

 Pro test to the center of the IDEX exchange, really do not fit with white

Introduction: to the center of the exchange

A lot of people understand to the center of the exchange, only on the concept of cognitive. Therefore, this article will through the author’s own experience, to show the reader the most real exchange traded to the center of the scene.

We choose to experience is IDEX, which is currently the largest Ethernet square to the center of the exchange Dapp. And the largest EOS to the center of the exchange of Dapp (Newdex), IDEX seems to be a stroke above.

 Pro test to the center of the IDEX exchange, really do not fit with white

(data from dappradar Odaily, the daily planet drawing)

IDEX experience

Want to experience to the center of the Dapp exchange, if you know the URL, you can directly search; if you don’t know the web site, you can visit dappradar or dappreview query to experience Dapp IDEX, go to the official website IDEX.

 Pro test to the center of the IDEX exchange, really do not fit with white

(Dappradar website screenshot)

IDEX has just landed, and the traditional center of the exchange, we need to have an own account, here is a square Ethernet address account. We can choose a new address, can also choose to import their own existing Ethernet address square wallet.

Import existing address

Click on the top right corner of the page “UNLOCK WALLET”, enter your existing Ethernet address Fang’s private key, you can import the address and encryption currency.

 Pro test to the center of the IDEX exchange, really do not fit with white

(import private key)

Import an existing address need to import the private key may leak private key, if the wallet tokens more, this operation is not recommended. Of course, you can also choose to import an existing hard and soft wallet purse, just more complicated. For example, import hard purse, need to set the relevant parameters in the wallet into the soft hard; such as the purse, you need to expand the program to download the Metamask wallet, and related settings in which the two operations are more difficult.

 Pro test to the center of the IDEX exchange, really do not fit with white

(download Metamask extension)

Sorting from the security: create a new address > > into the wallet into the private key; sorting from operational simplicity: import the private key to create a new address > > Import wallet; combination of characteristics, we create a new address that is more suitable for white users.

Create a new address.

Click on the upper right corner of the “NEW WALLET”, enter the password and keep in mind that create a wallet address click the “CERAT WALLET”. Here is the password of your decision, format, number of characters are not required, can be QQ, or any other choice, you can remember. Why set a password, explained later.

 Pro test to the center of the IDEX exchange, really do not fit with white

(account)

Click the “download keystore file, save it on your desktop, again landing the account used to get when you click on the next step.

 Pro test to the center of the IDEX exchange, really do not fit with white

(download the keystore)

Appears in the box to save the private key (to save the lost, can not find), copy the suggestions in the paper, a few more backup.

 Pro test to the center of the IDEX exchange, really do not fit with white

(save private key)

Click Finish to create a chain of IDEX address, the address on the top right corner of the page, similar to the center of the traditional exchange operation page.

 Pro test to the center of the IDEX exchange, really do not fit with white

(New Wallet address)

Click on the address, will jump to the Etherscan (Ethernet Fang browser) page, the address is currently available on the square in the etheric state, effective address. But we create new wallet address in order to verify whether the normal charge money and money, in large transfers, can take a small ETH test.

 Pro test to the center of the IDEX exchange, really do not fit with white Through the test, we create a new wallet address can be a normal charge coin and currency, with 4 minutes arrival.

transaction

In the transaction, we need to create a new wallet were transferred to the IDEX exchange address (IDEX address is actually to charge money). Click on the home page, and then click the “balance” to “charge money” can realize the transfer fee, GAS fee is normal, can be adjusted after the completion of the transfer to the transaction.

 Pro test to the center of the IDEX exchange, really do not fit with white

(coins, currency, charge transfer)

Here is a reminder that IDEX “filled coin”, refers to the landing at IDEX from the current wallet account to transfer IDEX address; “currency” refers to the IDEX address to our current login wallet account transfer; “charge money” and “money” similar to the center of the internal transfer of funds the exchange, but the transfer time is longer, it takes about 5 minutes of arrival (center of exchange instant arrival). The “transfer” refers to the current landing in IDEX wallet account to the other third party transfers.

Why does IDEX need to put money to charge into the exchange trading address? In fact, IDEX is a contract trading platform based on Intelligent Ethernet workshop, it adopts the mode of order book chain, the user must be to exchange currency address, all transactions brokered transactions through arbitration, according to the order of transaction, the final results released to the chain. Design of intelligent IDEX contracts, so that only the exchange has the right to submit a signed transaction to the etheric fang.

To the IDEX charge after the currency will encounter run away? To the center of the exchange is a feature that is not run away. We put the coin to IDEX address, can be reversed at any time your wallet, because it’s the default address exchange contract intelligent private key to the user is not restricted, although we can not see the private key.

Other steps and trading center of the exchanges, IDEX also limited price list (limited price) and market order (according to the current market price of the transaction; transaction fees), Maker (things) to pay 1/1000, Taker (active person to eat alone to pay 2/1000, and Taker) and also need to bear the Gas fee (no Gas fee the center of the exchanges).

From the Maker and the Taker cost difference can be seen, IDEX intends to allow more users to do Maker, acts as a liquidity provider.

In addition, because the Gas fee has been on the rise, IDEX provides transactions must be 0.15 ETH in order to carry out the transaction, no restriction of exchange center.

 Pro test to the center of the IDEX exchange, really do not fit with white

(Guadan limit)

 Pro test to the center of the IDEX exchange, really do not fit with white

(orders)

IDEX currently offers a total of 587 currency transactions, but the 372 currencies in 24 hours without any volume, accounting for 63.37%.

 Pro test to the center of the IDEX exchange, really do not fit with white

(IDEX trading area)

In addition, many people may wonder, why not the IDEX BTC, BCH and other mainstream currency? This is mainly because IDEX is built on Ethernet backbone Exchange Square, its transactions are etheric square on tokens, did not open and cross chain exchange other chain tokens, which affect its liquidity in a certain extent.

Some block chain startups will consider this issue, such as the Kyber Network company in January 31st of this year issued based on Ethernet Fang bitcoin ERC-20 token – WBTC, which is composed of BTC according to 1: 1 to the price of exchange, on the BTC, but the current market circulation is less than 70.

Currency

After buying coins, tokens can be from the IDEX address mentioned in his wallet account. One thing to note is that the IDEX minimum cash requirements of 0.04 ETH, the center of the exchange of currency is the minimum amount of 0.01 ETH.

 Pro test to the center of the IDEX exchange, really do not fit with white

 Pro test to the center of the IDEX exchange, really do not fit with white

 Pro test to the center of the IDEX exchange, really do not fit with white

(currency needs at least 0.04 ETH)

So far, we have completed the IDEX creation address, coins, and coins trading charge. At the end of the transaction, you can click on the page of the “SIGN OUT” to exit the landing.

Landing again

Once again landing transactions, we can import the address “, specifically as follows:

  • Create and save new account before the import address “key”;

  • Import a previously saved keystore and your password;

Overall, to the center of the exchange for retail, higher threshold, misoperation easily lost key and lead to capital loss; in addition, some token is illiquid, Volume 24 hours depth is not enough, it is difficult to meet the scanty, general transaction demand.

Postscript

At present, to the center of the exchange and the current world ranking center exchange in scale there is a large gap. CoinMarketCap data show that ranked first in the exchange currency trading volume reached 24 hours. 540 million dollars, this figure is 400 times more than the sum of IDEX and Newdex.

As Zhao Changpeng said: “the market has voting by foot, the center of the exchanges are more popular, trading volume and its liquidity are far higher than to the center of the exchange.”

Problem in front to the center of the exchange is, how to break the shackles of the inherent, Nirvana rebirth? If only for the pursuit of freedom, sacrifice other aspects (such as characteristics such as easy to use), so to the center of the significance is not great. To the center is not the ultimate goal, but a means.

JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

On behalf of the traditional financial power of JP Morgan officially announced the issuance of digital currency block chain technology, it will start a new world currency or to consolidate the hegemony of the dollar? Obviously this is inextricably linked with the federal financial institutions around the world, the purpose is not to become the next Tether, and JPM coin is not a USDT.

JPMorgan Chase issued JPM Coin, is not intended to be the next USDT, this is just the first step of traditional financial hegemony by rewriting the global currency pattern chain block.

In February 14, 2019 Morgan announced that its high-profile became the first successful anchor issued legal tender encryption currency bank of america. The move represents the traditional financial power began to build a new financial order. The current digital age, money is no longer gold, these become the key power. The Nixon era, the dollar is no longer pegged to gold, but the establishment of the Bretton Woods system still guarantees the current dollar hegemony.

Public information will be announced through the consensus on standards of JP Morgan, from the aspects of its operation, innovation and layout, we unscramble JPM Coin.

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

 JP Morgan challenges the traditional monetary structure, stable currency is just the first gun, the standard consensus

Bitcoin: very narrow consolidation near $3600, if there is a crash risk?

Source: currency exchange.

Bitcoin (BTC) today continue to narrow consolidation in the vicinity of $3600, an currency traded at $3597.28, or 0.11% 24h. The overall stability of the mainstream. 1. of the global digital currency market total market capitalization of $120 billion 359 million, 24h turnover was $19 billion 546 million.

2. bitcoin (BTC) is the global average price of $3617.09, the three major stock exchange, fire currency traded at $3596.52, OKEx traded at $3596.77, an currency traded at $3595.57.

The main features are as follows: 3. bit digital currency cash (BCH) temporarily reported $120.95 (+0.02%), bitcoin, BSV temporarily reported $61.93 (-0.16%); Ethernet (ETH) currency temporarily reported $121.42 (+0.13%); reboxetine currency (XRP) temporarily reported $0.30 (+0.33%); Wright currency (LTC) temporarily at $42.25 (+0.76%); extraction (EOS) temporarily reported $2.78 (+0.59%).

4.24 hours of market the market value of the top 100 currency rose three for:

The body (ONT) (+19.27%)

Source: non small

ONT- details: introduction of ontology ontology trust network architecture of a distributed trust system integration, the diversity of trust in one body of the protocol system for collaboration, integration of distributed multi entity authentication system and all kinds of different block chain system and information system, into the multi source authentication and information exchange protocol, and provide open the basic module scene different distributed applications, distributed peer-to-peer trust system, construct a distributed trust infrastructure across the chain, cross system, cross industry, cross application and cross terminal.

The MCO (+16.10%)

Source: non small

MCO- details: Crypto.com is the forerunner of the means of payment, but also a platform to promote monetary support encryption, encryption currency globalization. In July 6, 2018, Monaco officially announced the remodeling is CRYPTO.com, the service (including MCO Visa and MCO Wallet card application) also changed to MCO. Crypto.com through the interface beautiful and simple, practical financial service implementation block chain technology democratization, have a lasting positive impact on people’s lives. MCO tokens can be through the use of MCO Visa card, Crypto.com wallet, investment encryption and encrypted credit card to get bonuses, rewards and discounts.

The TOMO (+9.14%)

Source: non small

TOMO- details: TomoChain is an existing block chain platform (especially ethernet Square) the scalability problem of innovative solutions. TOMO is the TomoChain platform encryption currency for all third party applications running on TomoChain. TOMO as TomoChain infrastructure agreement tokens, all personnel are required to use TomoChain TOMO to build the application and release of encrypted tokens, so as to integrate into their applications in.

The decline in the top three for:

CENNZ (-8.60%)

The LRC (-8.54%)

The POLY (-5.76V%)

According to the “5. non small” market, the concept of plate or the top three are: bank card (+9.52%), World Cup (+7.05%), vote (+6.83%). The decline in the top three: Data Service (-7.45%), the concept of the electricity supplier (-5.12%) and DApp platform (-3.13%).

6.Cboe bitcoin March contracts traded at $3545, CME bitcoin contracts traded at $3560 in February.

Trading volume declined 60%, Dapp really cool?

Editor’s note: This article from the DappReview (ID:dappreview), author DR buddy, authorized reprint by Odaily daily planet.

After the Spring Festival has just started, a lot of friends received a private letter, asked me “why Dapp data fell so badly, is not Dapp circle is cold”. In order to give you a letter, we have access to some data on the DappReview, this is not a blow not black, data reporting facts and reason. After reading, I believe we will draw their own views.

Most of the data in the DappReview website, including the number of Dapp is calculated for each user, the calculation logic is only the number of address statistics with the Dapp contract address happened interactive, that is to say, if one day there are 1000 different address to a Dapp transaction is initiated, the day of the active user +1000.

According to the statistical rules, we sort the user data in the past two months, the results of figure (1):

 Trading volume declined 60%, Dapp really cool?

Figure (1)

From the perspective of the number of users, Dapp is still a thriving and the number of users continues to grow.

Then we have access to the transaction data, the results shown in figure (2):

 Trading volume declined 60%, Dapp really cool?

Figure (2)

No surprise, the data to ensure that no problem, in February 1st to 10 is during the Spring Festival, the average daily trading volume in December decreased by 60-70%.

Why is the number of users increases, the total transaction declined?

  • Mining play cool. The big miners digging machine with day and night no longer betting tokens, trading volume declined.

  • The mainstream social circle and the money to the attention of Dapp after a brief increase after steady state of decline. Although some new users continued to enter, but because of the lack of quality content, user retention is not high, which leads to the number of users has increased, but there is no actual contribution to the sales volume and activity.

  • Part of the Dapp through the brush user quantity increasing their Dapp rankings, the number of users of water.

  • The Spring Festival holiday has great influence on the China active users.

In order to have a better real active user cognition, we from several dimensions to screening “active users”

EOS

From the perspective of the number of transactions, according to the daily trading frequency reaches a certain condition to calculate the number of users. Figure (3):

 Trading volume declined 60%, Dapp really cool?

Figure (3)

Figure (3), we respectively according to the number of transactions more than 2 times, 3 times, 5 times, 10 times, four cases of statistical active users, of which more than 2 times and 3 times the user activity fluctuations, more than 5 times the number of users is stable between 10000-11000 and 10 times greater than the number of users. In 7000-8000.

From the trading point of view, according to the daily transaction amount reaches a certain condition to calculate the number of users. Figure (4):

 Trading volume declined 60%, Dapp really cool?

Figure (4)

Figure (4), according to the transaction amount is greater than 1 EOS, 2 EOS, 5 EOS, 10 EOS, four cases of active users of statistics, the overall downward trend, the transaction amount is more than 1 EOS users from 5000 down to 3300. EOS Dapp game player in the country, the Spring Festival has great influence, Google Analytics traffic statistics DappReview’s own website, during the Spring Festival EOS page visits fell 63%, TRON page views more overseas users only fell 18%.

More than two kinds of statistical standards, DappReview is more inclined to use “the transaction amount is greater than 1EOS as the standard of Dapp real active users.

TRON

According to the same standards, we get the map (5) and (6):

 Trading volume declined 60%, Dapp really cool?

Figure (5)

Trading more than 5 times the number of users is stable at 7000-8000, more than 10 times the number of users is stable between 3000-4000.

 Trading volume declined 60%, Dapp really cool?

Figure (6)

From the perspective of TRON transactions, the overall relatively stable, the number of users of the transaction amount is greater than 100TRX at the upper and lower 6000. During the Spring Festival are not affected.

ETH

Intuitively, we all feel that since August last year after the outbreak of EOS ecology, the etheric Fang seemed to have cold. But in fact, from the data, active users did not think so little.

 Trading volume declined 60%, Dapp really cool?

Figure (7)

Due to the low TPS, 5 times the average number of user transactions per day at about 1200, more than 10 times the number of users trading at around 600, compared to EOS and TRON was much lower.

 Trading volume declined 60%, Dapp really cool?

Figure (8)

From the perspective of transaction volume is not so miserable, the user data is relatively stable, in 2000-3000. But why in accordance with the number of transactions active users is not much? It is not difficult to understand, the average amount of Ethernet square on a single transaction more than EOS and TRON, after all, there are high transaction fee of Gas, single transaction amount is too low, it is not worthwhile.

We will study another interesting statistic data, the 2 month period in the above, each chain total occurred contract with Dapp interactive address number (the number of users):

  • 000 EOS:19.7

  • 000 ETH:15.1

  • 000 TRON:26.7

The number of active address within 2 months (number of users):

  • EOS:13845

    Rules: number of transactions 60+, volume 60EOS+

  • ETH:2133

    Rules: number of transactions 60+, volume 1.5ETH+

  • TRON:16236

    Rules: number of transactions 60+, volume 6000TRX+

The data in October and November, EOS is far more than the TRON, but why in December and January TRON catch up from behind?

Spinach from the 10 moon mining play from EOS in November to enter the bonus period and the outbreak period, December to enter the period of decline, the whole process is accelerated and ore miners.

TRON similar gameplay from the beginning of November, the month of December -1 into the bonus period and the outbreak period (especially thanks to the TRONbet leader in performance, and the big miners and mills) are less than EOS, enter the period of time compared to EOS decline more slowly.

Turnover contribution – 28 effect

 Trading volume fell 60%, Dapp really cool?

Figure (9)

The three strand gap is not large, a summary is: whether EOS, TRON or ETH, before the 1000 address of the user contributed more than 80% of the total transaction flow Dapp. The rest of the ten address also carve up 20% transactions.

Simple checking over the past two months, ETH, EOS, TRON of the three strand of data, can come to the following conclusions:

  1. We define for the number of users may vary according to our rules and data, DappReview believes that the current real daily active users: the magnitude of each chain are between 2000-6000.

  2. EOS and TRON from the data slightly ahead of ETH. Cadence on EOS slightly faster (ultimately Chinese smart, what play every minute of play and then play bad understand it).

  3. The overall Dapp heat current is relatively stable, vacuum only between old play play bad, new gameplay has not yet appeared, the market waiting for the game with the rhythm of the next.

 Trading volume fell 60%, Dapp really cool?

Over the past 3 months, the hot trend in Google search keywords in DAPP

In a word, Dapp is not cool, but because the miners, spinach into the down cycle will inevitably play. In 2019, Dapp if you want to continue to dominate the world in the encryption — at least one party, it will need to control quality content, the real value of the new ways of landing.

DR buddies have to capture some of the wind industry, until the project officer declared at the first time we will make an objective interpretation of the new trend, please look forward to.

Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities

Editor’s note: This article from the DVPNET (ID:DVPNET), author DVPNET, authorized reprint by Odaily daily planet.

This thesis consists of five chapters, respectively is Parity, UTF-8 encoding is introduced, what Rust dangerous string slicing, vulnerability analysis, and summarize the repair plan. Today we will show to the readers from the shallower to the deeper analysis of the etheric Fang parity client full version of remote DoS vulnerabilities.

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities

Parity, a related introduction

Ethernet Fang Parity client is in addition to Geth using a maximum Ethernet square client, using the Rust language.

According to ethernodes’s latest data show: Ethernet square Parity client accounted for 30% in the whole workshop Ethernet network, Geth client accounted for 40%.

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities In February 3rd of this year, the official announcement client serious vulnerability fixes a remote denial of service, this vulnerability affects 2.2.9 before the previous version and the 2.3.2-beta version, and 2.2.9 and 2.3.2-beta are the latest version. From the official announcement, can be understood as: the current vulnerability through all versions of kill bug fixes before.

Although many of the vulnerabilities affect version, but the scope is limited. The reason is the vulnerability requires an attacker to access the target client of Parity JSONRPC, while the Parity default is not open JSONRPC port.

The vulnerability specific effects range can be through the FOFA statistical results:

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities From above, we can see there are 1195 parity nodes open JSONRPC port network, so the vulnerability affects versions, but the scope of co..

What is two UTF-8, encoding?

We need to know about the UTF-8 encoding before studying this loophole, helps us to better prepare for the vulnerability research.

Unicode is a character encoding is an encoding within the computer industry general at present, because all Unicode language are unified into a set of encoding, to solve the garbage problem in the industry due to the language of different.

UTF-8 (8-bit Unicode Transformation Format) is a kind of Unicode variable length character encoding, also called unicode.

In this analysis of vulnerabilities, you only need to know the following knowledge is enough:

UTF-8 encoding, a English character for a byte, a Chinese (traditional) accounted for three bytes.

Section three, the risk of Rust string

In the last chapter introduces the reason of UTF-8 encoding is: UTF-8 encoding Rust is used, the etheric Fang Parity client using the programming language is Rust.

The string section is well understood, is a string interception of a string, but there is a problem of the string section Rust:

Cut the bytes not characters

The simple test, as shown below:

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities

The image content is displayed, we can see the 0-3 elements when slicing the STR1 string, cut out the “DVP” 3 characters, but when sections of the 3-6 elements, if according to the character of what should be cut out “is the best”, but did not.

Why did this happen?

The reason is that the Rust byte slice. Mentioned in the previous article in this part: in UTF-8 English Chinese accounted for 1 bytes, 3 bytes, so we cut 3-6 just cut out the word “yes”.

This is exactly 3 bytes to slice a complete Chinese character case. Imagine: if the slice is 2 bytes?

– will show half a Chinese?

The answer is: of course not.

When the section cut out time is not a complete character, Rust will not give you cut out any character, but wrong.

A simple test.

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities Through the picture we can see that when the 3-5 section when the program error, because the cut is not a complete Chinese character.

Ethernet Fang Parity client is in the wrong key, this is our analysis of this paper exploits today.

Four, vulnerability analysis

The DVP security team at the time of this writing, the official website did not disclose any details of vulnerabilities, possibly because of some nodes has not been updated to version fixes vulnerabilities and retrieves a reason, after the discovery of the network did not see someone in the discussion of this loophole, check the commit record and can only go to the Parity GitHub, trying to find the repair patch about this vulnerability, the vulnerability patch analysis, we finally saw the commit:

Https://github.com/paritytech/parity-ethereum/commit/3b23c2e86d09a8a8b8cd99dfa02390177498e6b7

Probably looked at the basic can confirm this is the repair patch, patch number string sections replaced by starts_with function:

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities Through the above, we can see that before writing in 0 to 2 is the first element of the string cut out, and the judge is not to “0x” at the beginning, if the length is less than 2 and two string elements instead of “0x” will return a error. the above we understand the Rust section there is a certain danger, if the string section controllable it will lead to a program error.

Then, the use of string sections where it can be exploited remotely?

Look at the pictures carefully and found that the two file is modified in the figure are in the RPC directory of the types directory, we guess some types of data should be defined as the JSONRPC interface to the map, there are hash and uint.

To check the following: the official RPC documentation.

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities In fact, the original official documents have been described, because JSON only string and number two types, such as integers, byte, hashes, so these data types are through 0x string form the prefix encoding transmission.

According to the official document description, we test the vulnerability is very convenient. At the request of the sample document to find any 0x a prefix argument, eliminating the function call chain time.

Here is a relatively common eth_getTransactionByHash interface, request as follows:

Curl –data'{“method”: “eth_getTransactionByHash”, “params”: “[hash],” trading “Id”: 1, jsonrpc: 2}’-H -X POST localhost:8545 “Content-Type: application/json” The words are very simple, “hash” will be replaced by Chinese string trading on the line, for example: Curl –data'{“method”: “eth_getTransactionByHash”, “params”: [] “Hello DVP”, “Id” 1 “jsonrpc,” “2.0” “Content-Type: application/json”}’-H -X POST localhost:8545 The actual demonstration:

 Analysis of the etheric Fang parity client full version of remote DoS vulnerabilities

You can see in the request interface does occur and abnormal node collapse.

Fifth, repair plan and summary

A repair plan mentioned in front of the official, is the string [a..B] this section writing all changes off.

But this is just a temporary fix, to long-term prevention of such vulnerabilities, we think public chain developers should to better understand the characteristics of language than traditional software developers, because a lot of code using conventional programming thinking to see the problem, but there may be a characteristic of language itself, some developers do not understand, in the characteristics of auxiliary vulnerabilities has, before using the make function go language abuse public chain, and the parameters are properly controlled, then generate a denial of service vulnerability caused by OOM.

The DVP security team hopes to give you warning analysis through this period of vulnerability, developers in the future development of the chain block on the road, need to know more about the characteristics of language, so as to make more stable and safe ecological chain block.

Reference links:

Https://www.parity.io/security-alert-parity-ethereum-03-02/

Https://blog.csdn.net/wowotuo/article/details/75579103

Https://baike.baidu.com/item/UTF-8/481798 fr=aladdin?

Https://github.com/paritytech/parity-ethereum/commit/3b23c2e86d09a8a8b8cd99dfa02390177498e6b7

Https://wiki.parity.io/JSONRPC

Bitcoin futures for two consecutive days at below $3600, a week low

Abstract: the two American exchange bitcoin futures contract fell for two days, 14 days received a record low since February 7th, two consecutive days to below $3600 last week, tired rose more than 5%, for the year six weeks before the first single week tired rose.

The chain when February 15th hearing, the United States on February 14th, two American exchange bitcoin futures contract fell two, received a record low since February 7th, two consecutive days to below $3600 last week, tired rose more than 5%, for the year six weeks before the first single week tired rose.

The world’s largest futures exchange, the United States Chicago Institute (CME) bitcoin futures contract fell more than 0.14% BTC 3 months, closing at $3565, down more than 13 0.97%, closed at $3570, up about 5.55% last week.

The largest U.S. options exchange Cboe XBT bitcoin futures April contract fell more than 0.49%, to close at $3552.5, 13 fell more than 0.97%, to close at $3570 last week, tired rose about 5.84%.

When the App chain market, the spot price of bitcoin currency such as most currency exchange around $3600 encryption line, the last 24 hours tired fell more than 0.2%.

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Bitcoin futures prices still heavy on the $3600 this week, fell over 1%

The chain when February 16th hearing, the United States on February 15th, bitcoin futures contract from two US exchanges two day losing streak, but failed to stand on the $3600 last week, tired rose more than 5% recorded six weeks after the first rise this week, tired and fell more than 1%.

The world’s largest futures exchange, the United States Chicago Institute (CME) bitcoin BTC 3 month futures contract closed flat, closing at $3565, down more than 14 0.14%, closed at $3565, down more than 1.38% tired this week.

The largest U.S. options exchange Cboe XBT bitcoin futures contract in April closed up more than 0.14%, to close at $3557.5, 14 fell more than 0.49%, to close at $3552.5, down more than 1.79% tired this week.

When the App chain market, the spot price of bitcoin currency such as most encryption currency exchange of slightly less than $3600, the last 24 hours rose slightly.

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The policy of the United States Wyoming | weekly digital currency is defined as property; to collect fees from Venezuela currency remittance in advance encryption; block chain + Commercial Service Reform in Guangzhou

 The policy of the United States Wyoming | weekly digital currency is defined as property; to collect fees from Venezuela currency remittance in advance encryption; block chain + Commercial Service Reform in Guangzhou

This week, the block chain and digital currency related favorable policies.

China, Shanghai city block chain engineering technology research center of Fudan University landing; the people’s Bank and other five ministries jointly issued the “opinions”, and said it will regulate the Internet financial development in rural areas to actively use the blockchain technology; Guangzhou city issued “to deepen commercial system reform in Guangzhou city implementation plan”, to promote the “block chain + commercial service” pilot reform; “Regulations” block chain management information service today formally implemented.

International, Korea Telecom Company KT and Gimpo city will issue the currency block chain area in 4 months; the United States released SEC encryption industry reports ICO can be used as stock issuance; Wyoming by bill SF0125, provides digital assets for property; the Commodity Futures Trading Commission (CFTC) to give priority review of encryption currency supervision practice right; Indonesia futures regulators issued new rules for encryption of assets; South Korea’s Financial Services Commission (FSC) on the 3 block chain services included in the financial regulatory sandbox review object.

Currency market

Bitcoin BTC at $3607, 7 rose +5.74 percent decline;

The etheric Fang ETH at $122.19, within 7 days of decline up to +14.54%;

Reboxetine currency XRP reported $0.30202, within 7 days of decline up to +2.4%;

The above currency market data acquisition time is February 15, 2019 06 06.

 The policy of the United States Wyoming | weekly digital currency is defined as property; to collect fees from Venezuela currency remittance in advance encryption; block chain + Commercial Service Reform in Guangzhou

Source: Investing.com website Chinese station

This week the focus

Domestic plate

A good news

Members of the Party committee of Beijing Insurance Regulatory Bureau Jiang Ping silver: actively explore and improve the service level using the block chain core technology

Recently, in the “204th banking insurance industry in a regular press conference, the Beijing insurance regulatory bureau Party committee member, said Jiang Ping silver, to guide and encourage bank insurance institutions to fully grasp the financial resources of science and technology, actively implement the innovation driven development strategy, product and service innovation in the credit, bank of Beijing Insurance Regulatory Bureau actively explore to enhance the professional services and the characteristics of the level of the use of artificial intelligence, big data, block chain, cloud computing and other core technology, the upgrading of control system, credit evaluation model and product marketing mode of traditional bank, speeding up the line of product innovation, effectively extending the service radius, reduce cost, solve customers for information asymmetry problem credit link.

Shanghai city block chain engineering technology research center of Fudan University landing

The daily planet news 2 on Sept. 15, led by the Shanghai Municipal Science and Technology Commission, “Shanghai city block chain engineering technology research center” held at the landing ceremony at the Fudan University, which was established mainly for the active support of scientific research personnel around the forefront of generic technology and distributed books conversion research, exploratory research, the practicability of the frontier science and combining the actual market demand the. The center relies on Fudan University, zhong an online property insurance joint Limited by Share Ltd, Shanghai Public Information Technology Co., Ltd. jointly established.

The people’s Bank and other five ministries jointly issued the “opinions”: to regulate the Internet financial development in rural areas, actively use block chain technology

In February 11th, the people’s Bank, silver CIRC, CSRC and the Ministry of finance, Ministry of agriculture and rural jointly issued “guidance on the revitalization of the” rural financial services. “Opinions” pointed out that the application of the new technology in the field of rural finance. To regulate the Internet financial development in rural areas, actively use big data, block chain technology, improve the recognition, agricultural credit risk monitoring, early warning and disposal level.

Two, advance

Guangzhou city issued “to deepen commercial system reform in Guangzhou city implementation plan”, to promote the pilot block chain + Commercial Service Reform

In February 14th, “deepen the reform of commercial system of Guangzhou city plan” (hereinafter referred to as the “plan”) by the Guangzhou municipal government executive meeting approved. “Plan” put forward, to promote the commercial registration confirmation system, block chain + commercial service “and” the lack of capacity + value-added credit approval “three reform.

The “provision” blockchain service management information today formally implemented

In January 10, 2019, the national Internet Information Office issued “Regulations” management information service chain block. According to the network information office official website shows, February 15th, the “provision” blockchain service management information comes into effect. Kyoto firm issued a “blockchain interpretation of information service management regulations” and “Regulations” pointed out that part of the terms of bias in the provisions in principle, and some requirements in the current implementation conditions are not ripe, operability is questionable, there are several points for discussion and Perfection: the concept of 1. block chain information service provider not completely clear; technical standard 2. block chain information service provider is not clear; the safety assessment process 3. block chain information service provider is not explained; 4. self-discipline conditions are not ripe.

Guangzhou province CPPCC for 2018 outstanding proposals, one block and chain

Recently, the two meeting of the twelve session of the Guangzhou Provincial People’s Political Consultative Conference held in Guangzhou. The meeting commended the provincial CPPCC 2018 outstanding proposals, including members of the Liang Qi “on the Guangdong block chain development proposal”.

The judgment of Wuhan’s first bitcoin theft came into effect

According to the Wuhan evening news, February 10th, Wuhan’s first bitcoin theft judgment came into effect. 0.22 bitcoin POS machine in 2016 engaged in marketing work to steal the victim Huang Liu bitcoin wallet, resale profit 24 thousand yuan. In the case of the Hanyang court, Hwang theft was sentenced to one year and three months, fined 3000 yuan, the money was also sentenced to continue to pursue is also complicated by the victim liu.

International plate

A good news

The survey showed that bitcoin is completely legal in at least 111 countries

According to the survey results of Coin Dance, at least in the 111 countries, bitcoin transactions are legitimate. In the bitcoin exchange currency trading is the most common in the 20 countries, only 3 countries in the bitcoin transactions are illegal, Nigeria, Indonesia and Vietnam respectively. There are 9 countries will bitcoin classified as “restricted”, two on behalf of the state, the most prominent is Chinese and India.

Korea Telecom Company KT and Gimpo city will issue the currency block chain in April

In February 14th, South Korea Telecom Company KT said it was selected for the Gyeonggi Do Gimpo City area currency platform operation agency enterprise bid negotiation priority object, will be released in April this year the currency block chain area. According to earlier reports, Gimpo city in order to stabilize the national economy and invigorate the alley has been pushing the economy, issue 11 billion won scale monetary area. KT “K- token” technology platform in the monetary area, the issue can be set up using areas, enterprises, permissions, term after.

Wyoming through the SF0125 act, provisions of digital assets for property

According to Wyoming’s official website news, and block chain related SF0125 bill. The bill on the classification of digital assets under current law; digital assets are specified in the Uniform Commercial Code of the property; authorized digital assets security interests custody service standards and procedures for the bank, managed service agencies; Cheng Qinghuai Wyoming under the jurisdiction of the court to the digital asset right specified; applicability; authorization issued rules; and set date.

The United States SEC encryption Industry Report: ICO can be used as the issuance of securities

The United States Securities and Exchange Commission (SEC) recently released a report on the encryption industry, behind the ICO rules and procedures and legitimacy. The report said, ICO will bring about fraud, and increased the risk of price manipulation, because these assets market regulation level is lower than that of the traditional capital market. In the report, SEC lists the users need to know about ICO five detailed guidelines. They said that ICO can be used as the issuance of securities, and belongs to the jurisdiction of the United States Securities and Exchange Commission to enforce federal securities law. The stock exchange ICO are most likely to need in the United States Securities and Exchange Commission registration or exemption from registration.

The 2019 CFTC review priorities include encryption currency supervision practice

The Commodity Futures Trading Commission (CFTC) announced in 2019 the agency review of priorities for the different departments of registered persons. According to the February 12th CFTC upload news release, CFTC market supervision department (DMO) new 2019 review of the compliance department’s priority will include encryption currency supervision practice. The chairman of the CFTC J. Christopher Giancarlo commented that in the past few years, encryption currency market has been growing, regulators need to develop a better regulatory framework for operators in the market of the company. CFTC hopes to better control the encryption currency.

UN Deputy Secretary General Getu: block chain technology will bring significant benefits to the “The Belt and Road construction

UN Deputy Secretary General Getu said, “in The Belt and Road construction process, should pay attention to and the fourth industrial revolution accompanied by opportunities and challenges, to seek development in innovation. Artificial intelligence, automation, block chain technology will produce significant benefits, but also the impact of employment opportunities, increasing inequality, which requires “The Belt and Road” construction of the dynamic change of international partners, to overcome the drawback of the new technology may bring.

Slovakia’s foreign ministry official Duan Matulay: the establishment of the blockchain center is the focus of future cooperation with China

Slovakia’s foreign and European Affairs Department of economic cooperation department director general, “16+1″ cooperation Slovakia National Coordinator Duan Matulay said the establishment of the blockchain center is the focus of future cooperation with Chinese. Duan Matulay believes that all around the world, is a new field of chain block. Block chain technology not only applied to the field of virtual currency, we should understand it in the future play a role in this situation and 1995 are very similar, then the Internet just began to rise, people still don’t understand how to use the Internet, the Internet is now everywhere. Sri Lanka established block chain center can better understand the different applications in other fields of technology in the future.”

Japanese police department, the financial department and the consumer Bureau jointly held third virtual currency exchange Secretary level meeting

Recently, the Japanese police department, the financial department and the consumer Bureau jointly held third times on the virtual currency exchange Secretary level joint meeting, according to the virtual currency exchange regulation, for without a license exchange audit and the risk of the user that issues such as exchange of views. But did not disclose more details of the meeting. Note: prior to three departments in November 7, 2018 and June 27, 2018 were held two times about the virtual currency exchange conference, issued a significant policy or regulatory measures after the meeting.

Two, advance

Indonesia futures regulators issued new rules for encryption of assets

Indonesia Futures Exchange Regulatory Commission (Bappebti) issued on the implementation of the provisions of the new encryption assets in the futures trading market entity. Good governance, these rules focus on encryption currency trading legal certainty and consumer protection. In addition, requirements of regulatory agencies to establish encrypted currency futures trading entity market.

South Korea’s Financial Services Commission (FSC) 3 block chain services included in the financial regulatory sandbox review object

Recently, South Korea’s Financial Services Commission (FSC) announced that by the end of January, 88 financial companies and existing FinTech company submitted 105 services to apply to become a financial regulatory sandbox case, including 3 block chain service. FSC will review the 40 priority candidate projects in the middle of the month before, to determine its compliance with the audit requirements.

The United States SEC Commissioner Hester Peirce:SEC is making supplementary guidelines on encryption currency sales “”

The United States Securities and Exchange Commission (SEC) chairman Hester Peirce at the University of Missouri School of law in a speech said, SEC is currently developing guidelines (supplemental guidance) “, to clarify when securities law may be applicable to encryption currency sales.

Third, regulatory upgrades

The Venezuelan currency remittance regulation encryption effect, the maximum charge 15% Commission

The encryption of active Sunacrip regulators announced new regulations encryption monetary remittances has come into force, it has begun the regulatory encryption currency remittance. It is reported that the decree established “to a natural person within the territory of the Republic of Venezuela Bolivar to send and receive encrypted assets remittance requirements and procedures”. Sunacrip has the right to set the remittance limit, and will be charged the highest amount of transactions 15% commission. In addition, it also announced new details of cryptographic service provider registry.

Indonesia encryption currency traders interpretation encryption rules: the threshold is too high

Last week, Indonesia Bappebti Futures Exchange Regulatory Commission announced on the implementation of the provisions of the new encryption assets in the futures trading market entity. Indonesia encryption currency traders believe that the new regulations will hinder the development of the industry. The new requirements, will be 1 trillion rupees ($71 million 170 thousand) as a minimum real crypto currency futures traders capital. Digital asset dealer Indodax CEO Oscar Darmawan said, the minimum paid in capital requirements higher than the open rural banks, is the real minimum is far higher than that of the futures broker 25 crore capital requirements. In addition, the new regulations require traders with the customer support department, employ at least one certified safety staff, will save the transaction data of at least 5 years, and have a server in china.

The United States judge Blockvest ICO securities, and violations of federal securities laws

According to the U.S. Securities and Exchange Commission (SEC) official news, American judge Gonzalo Curiel issued a ban on Blockvest and founder of Reginald Buddy Ringgold, found the defendant violated federal securities laws, fraudulent sales of securities. The court explained that the determination of SEC has demonstrated that the BLV token is securities and in line with the Howey test. Last November, the judge said, SEC has not proved that only 32 test investors to buy the BLV token is stipulated in the securities law “securities”, SEC should not ban.

South Korea’s Financial Supervision Institute of financial institutions such as the dissolution of its encryption currency research group

With the upsurge of encryption currency cooling, the establishment of South Korean financial institutions responsible for monetary research organization also dissolved encryption disappeared. South Korea’s Financial Supervision Institute (FSS) in the adaptation 2 April 8 organization, cancel the Fintech center block chain research group “, and the business was transferred to Fintech P2P financial market supervision group. The Bank of Korea recently disbanded virtual currency research group, the relevant work has been handed over to the digital innovation research group financial settlement Bureau “”. The Financial Services Commission (FSC) to establish 1 last year and operate the “virtual currency research group”, but in the same year 7 months after the reorganization of its dissolution.

SEC Commissioner SEC: “mysterious rules” resulting in bitcoin ETF is long overdue

2 local time June 12, the U.S. Securities and Exchange Commission (SEC) Commissioner Hester Peirce an activity in Bipartisan policy center again downplay bitcoin ETF prospects. The bitcoin ETF approved long delays attributed to SEC’s “mysterious rules”, and not that time.

J.P. Morgan to send money, but you can’t buy

Editor’s note: This article from the Hydro community (micro signal: We_R_HOT), the author: Shichao, Odaily Daily Planet authorized forwarding.

This will be the first one to issue the mainstream American bank currency from the famous JP encryption, Morgan (JP Morgan).

 J.P. Morgan to send money, but you can't buy

From CNBC news, foreign people have been eating melon talk Hi, is said to be the first regular wash money, have said is to increase the encryption currency control……

When we koongpa holidays, what the ocean what happened? Let’s take a look at.

This coin is called JPM Coin, Morgan’s main support JP payment service. To have a large-scale payment business of the company, the global circulation of funds of more than $6 trillion a day.

Obviously, JP Morgan is preparing for the future of capital globalization. Payment from the border to the issuance of corporate debt, will be transferred to the JP block chain, Morgan spotted a block chain compared with traditional wire, super transfer speed.
“Everything in the real world, as long as the move to block the chain, you can go to look at from the perspective of transaction and payment. “Block chain project JP Morgan director Umar Farooq said,” by JPM Coin, in fact, is endless, as long as you have an enterprise or institution related to distributed books can be used. “

This is one of the first practical application in banking encryption currency.

So, before Morgan JP said bitcoin is not a liar?

In general, the banking sector will indeed for the high risk asset type conservative. Last year, JP Morgan and two other banks prohibit credit card customers to buy bitcoin.

Earlier, Goldman also expressed to create a bitcoin transaction counter plan was shelved for a bear market.

In the traditional financial industry eyes, block chain technology is rising from the wreckage of the 2008 financial crisis, the banking system has played a saboteur.

Because of this, J.P. Morgan CEO Jamie Dimon had attacked bitcoin, bitcoin is fraud, investment bitcoin people will not have good results……

 J.P. Morgan to send money, but you can't buy

(however, he and his manager who was always hold an optimistic attitude to block chain technology and electronic money, regulated. )

It should be a sentence: If you cant beat them, join them.

So, JPM Coin is used?

1 JPM Coin = $1, similar to a stable currency in concept.

Customer issue Token deposited in the bank $; in the use of tokens for payment or purchase in the safety block chain, the destruction of Token and bank to customers return the corresponding number of dollars.

 J.P. Morgan to send money, but you can't buy

Fundamentally speaking, JPM Coin is the largest use of real-time settlement. The following scene:

A large enterprise customers of international payment

Now among the financial institutions usually use wire transfers, such as Swift, a decades old network. Farooq said that the inter agency transaction settlement can take longer than a day, because the system has the closing time of transaction, different countries have different operation system.

The use of JPM Coin, it can real-time settlement at any time of the day.

Two, securities trading

Last April, JP Morgan tested the blockchain debt issuance, to create a virtual deposit of $150 million that the Bank of canada.

If you rely on wire purchase, payment transactions and transaction settlement between the time difference. So institutional investors can use JPM coin to achieve real-time settlement.

Three, for the company and its subsidiaries worldwide to provide financial services

The business of holding a large number of compliance funds flow of the throat, from Honeywell to Facebook employees, suppliers and so on payment services. This is a light business in 2018 years for JP Morgan created 9 billion dollars in revenue.

“The money in a big company in the global subsidiaries, flow, flow to. There is no way to make a subsidiary can represent both cash on the balance sheet, and you really don’t have money to collect?

This will be the integration of capital, in order to obtain higher interest rates. “

In general, JPM applications will be: Coin will be replaced by the Internet device block chain payment scenarios.

Well, the JPM Coin and other stable currency different?

General mortgage type stable currency, their mortgage funds deposited in another bank, collateral adequacy transparency for stable currency factors. JPM Coin is JP Morgan bank to issue its own currency stability, some of the more secure.

Block chain type stable currency ledger general mortgage is open and accessible, and the JPM Coin license is required (i.e. enterprise security block chain JP Morgan and its partners to build solutions), only by JP Morgan’s institutional clients to use this money to trade Morgan.

Well, where can I buy a JPM Coin?

No, but you can’t buy……

Although regular admission, is a bullish news. But we could never buy retail to your JPM Coin.

Only after the supervision and inspection of JP Morgan’s large institutional clients, such as companies, banks and brokers to use JPM Coin.

 J.P. Morgan to send money, but you can't buy

That is to say, unlike the traditional currency stability oriented object is all JPM, Coin oriented object is the institutional clients (such as banks, brokers and dealers, the company)

From the use of points, the traditional currency stable for the purpose of investment, while Morgan is used to block currency relates to the application of payment chain.

Yes, if the other bank is RMB?

After JP Morgan first to test the water, if the real-time settlement can bring the real deal for its profits, reduce friction, does not exclude other banks with that money may.

JP Morgan is betting preemptive, and the market in huge share of the Fortune 500 companies to pay 80% of the company is his clients.

“Almost every large company are our customers, most of the world’s mainstream banks are” Farooq said, “even if the chance is only limited to the institutional level of JPM customers, we should not retreat. “

 J.P. Morgan to send money, but you can't buy

JP Morgan CEO Jamie Dimon

It is worth mentioning that, JPM Coin will be released in Quorum, is a version of the etheric fang. Later, will be extended to other standard block chain network. (Note: the public may not refer to the chain)

This message is sent by the 5 hours ago, with a bitcoin price chart.

 J.P. Morgan to send money, but you can't buy

Reference reading:

  • J.P. Morgan Creates Digital Coinfor Payments

  • JP Morgan is rolling out the first US bank-backed cryptocurrency to transform payments business