Ethereum shows how to cancel the waiting package

1. Ethereum is a new and open blockchain platform, which allows anyone to build and use decentralized applications running through blockchain technology in the platform
just like bitcoin, Ethereum is neither controlled nor owned by anyone - it is an open source project created by many people around the world. Different from bitcoin protocol, Ethereum's design is very flexible and adaptable. It is very easy to create new applications on the Ethereum platform. With the release of homestead, anyone can use the applications on this platform safely
Ethereum is a programmable blockchain. It does not give users a series of preset operations, but allows users to create complex operations according to their own wishes. In this way, it can be used as a platform for many types of decentralized blockchain applications
in a narrow sense, Ethereum refers to a series of protocols that define a decentralized application platform. The core of Ethereum is Ethereum virtual machine (EVM), which can encode any complex algorithm. In computer science terminology, Ethereum is "Turing complete.". Developers can use the existing JavaScript and python as the model of other friendly programming languages to create applications running on the Ethereum simulator.

2. At the top of Ethereum is DAPP. It exchanges with the smart contract layer through Web3. JS. All smart contracts run on EVM (Ethereum virtual machine) and use RPC calls. Below EVM and RPC are the four core contents of Ethereum, including: blockchain, consensus algorithm, mining and network layer. Except DAPP, all other parts are in the Ethereum client. The most popular Ethereum client is geth (go Ethereum)

3. Return the result of ifconfig
eth0 to awk for processing
where - F & # 39;:|< br />+'
this is a separator defined by awk and then matched with "BCAST & quot;, Take the content of the fourth column
since your command is not universal, you can't output the result here, but you should intercept the broadcast address

4. In fact, investment bank is the proct of the development of securities and joint-stock company system to a special stage. At the same time, it is also a very important subject in the developed securities market and a mature financial system. It plays an important role in the current social and economic development, such as communicating capital, constructing the securities market by supply and demand, So what are the four big investment banks? Now let's give you a detailed introction
1. Merrill Lynch, one of the most famous securities retailers and investment banks in the world, is headquartered in New York, because it is one of the largest financial management consulting companies in the world, and it is also very famous in the financial instry
2. Morgan Stanley is commonly known as "big Mo" in the financial circles. It was founded in New York, USA. its main business includes securities, asset management, business merger and reorganization, credit card and other financial services. So far, it has representative offices in more than 600 cities in 27 countries around the world
3. Goldman Sachs Group, founded in 1869, is headquartered in New York, with branches in Tokyo, London and Hong Kong, and 41 offices in 23 countries around the world. At present, all operations of the company are based on a closely integrated global foundation, By excellent experts for each customer to provide quality service
4. Citibank, which was founded on June 16, 1812 in New York State, mainly provided financial services for some merchants in New York when it was just founded. However, up to now, Citibank has branches all over the world, bringing better financial services to residents all over the world.

5. When transferring money, Ethereum will have a lot to do with the confirmation of Ethereum network and miners. If you encounter more problems with atoken wallet, please feel free to consult customer service

6. Transfer in daily life is essentially different from blockchain transfer, which makes the understanding of blockchain transfer state complicated

we will see such states as "waiting for confirmation", "confirming", "transaction failed", "successful", some of which belong to the unique state of blockchain transfer

bank transfer
there are two steps in daily life: payment and settlement

normally we all belong to "payment" through Alipay consumption and bank card transfer, which is essentially a record of information and a credit debt certificate. And this kind of certificate needs to be implemented, that is, liquidation. Its essence is the flow of funds

a common situation:

transfer 200 yuan from my CMB card to your ICBC card
there are two steps in this process:

when I successfully transfer 200 yuan to you, this step is "payment" for you and me, and its essence is information flow; For China Merchants Bank and instrial and Commercial Bank of China, it is to establish the relationship between creditor's rights and debts. It records a debt note: China Merchants Bank owes ICBC 200 yuan
then, the banks regularly implement their complicated creditor's rights relationship in the central bank's clearing system (the first step of "CMB owes ICBC 200 yuan" is one of the inextricable links). At this time, it is through "clearing" that information flows into real capital flow
for us, once the transfer button is confirmed in the first step, you can rest assured and I can rest assured. But actually, it's only the first step. In the future, the real time-consuming operation will be hidden in the cycle operation of the whole financial infrastructure and system. They are not common people, but the cornerstone of our convenient financial life< br />
Photo by Jos é Mart í n Ram í Rez C on unsplash
blockchain transfer
does it have payment and clearing? This concept actually does not exist here. Blockchain transfer integrates these two steps, and each transfer on the chain records the real capital flow

as a public account book, blockchain is open, transparent and tamperable

therefore, the transfer on it is in a more complicated state. This account book can not be wrong and must be recorded carefully

so we can see these states: "waiting for confirmation", "confirming", "transaction failure" and "success"

"waiting for confirmation": waiting for the miner to confirm the transfer information and pack it into the block

"confirming": one block confirmation is not secure enough and needs more confirmation. In this way, we can understand why Ethereum transfer needs 12 block confirmations to be considered successful

"transaction failure": if the fee you give to the miner is not enough for the miner to confirm the transfer information, it will fail (or it may be caused by other reasons)

"success": at this time, your transfer record is on the blockchain ledger, which can not be tampered with and can be checked.

7. Ethiopia is located in the northeast of Africa, on the southwest coast of the Red Sea, bordering on Djibouti and Somalia in the East, Sudan in the north and West, and Kenya in the south, covering an area of over 1103600 square kilometers. The coastline of Ethiopia is 1013km long. The territory is mainly mountainous plateau, most of which belong to the Ethiopian plateau. The central and western regions are the main part of the plateau, accounting for 2 / 3 of the whole territory, with an average altitude of 2500-3000m, which is known as "the roof of Africa". At the same time, ETH is also the country code of the Federal Democratic Republic of Ethiopia in FIFA
response time: March 4, 2021. Please refer to the official website of Ping An Bank for the latest business changes
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8. More than ten hours have passed since I picked up Ethereum from setoken's wallet, and I'm still packing because the back office has to carry out accounting and calculation. If not, you need to call customer service.

9. 804 road
the whole journey takes about 25 minutes
/ 4.9 km /
7 stops
/
it goes directly to the starting Shuangliu passenger station, about 32 meters, and walks to Shuangliu passenger transport center. Take bus 804 at 7 stops and get off at Shuangliu Airport