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⑴ How to develop a browser development solution based on blockchain

The blockchain browser is the main window for browsing blockchain information. Each block records The content can be viewed from the blockchain browser. Usually digital asset users will use a blockchain browser to query the transaction information recorded in the block. The main function of the blockchain browser solution developed by Yingtang Zhongchuang is that it records in detail the confirmation process of each block and the generation and distribution process of digital currency, and completely records the transactions between each block. The circulation situation of digital currency, thus more completely and openly disclosing the stock, increment, turnover rate and other information of digital currency. The only thing hidden is the owner behind each block.

⑵ btc blockchain browser address

https://tokenview.com/.
The address of btc blockchain browser is https://tokenview.com/.
A browser is an application used to retrieve, display and deliver Web information resources. Web information resources are marked by a Uniform Resource Identifier (URI), which is a web page, a picture, a video, or any content presented on the Web. Users can use hyperlinks to browse related information through the browser.

⑶ What is qtum

qtum is the quantum chain currency.

Qtum Blockchain (referred to as "Quantum Chain" or "Qtum") is committed to developing a third blockchain ecosystem besides Bitcoin and Ethereum, through the Value Transfer Protocol ("Value Transfer Protocol" ) to achieve point-to-point value transfer, and based on this agreement, build a decentralized application development platform ("DApp Platform") that supports multiple industries (including finance, Internet of Things, supply chain, social networking, games, etc.).

Extended information:

Due to technological innovation, improved governance structure, and wide range of applications, Quantum Chain will become a public chain superior to Bitcoin and Ethereum:

1. From a technical perspective, Quantum Chain has a strong development team. By introducing Identity, Oracle and data feeds mechanisms, and being compatible with the UTXO transaction model of the Bitcoin Improvement Proposals, it has achieved The first smart contract platform based on the IPoS (Incentivized Proof of Stake) consensus mechanism. In terms of compliance, it also meets the regulatory needs of different industries.

2. From a governance perspective, Quantum Chain has established the Quantum Chain Foundation, which is dedicated to the development and construction of Quantum Chain, advocacy and promotion of governance transparency, and promotion of open source ecology.Social security and harmony. By formulating a good foundation governance structure, we help manage general anecdotes and privileged matters of open source community projects from multiple dimensions such as code management, financial management, and public relations, thereby ensuring the sustainability of the quantum chain and effective internal management of the foundation. and the safety of funds raised.

3. From the perspective of Quantum Chain application, Quantum Chain introduces off-chain factors through "decentralized applications" and "master control contracts" to form a blockchain master control contract that conforms to real-world business logic. Support multiple industries and channels, and ultimately implement the Go Mobile strategy. In the Quantum Chain ecosystem, we will work with third-party developers to support the provision of mobile services from the technical architecture, including: mobile wallets, mobile DApp applications, and mobile smart contract services.

4. As the most promising blockchain ecosystem, Quantum Chain perfectly combines the advantages of Bitcoin and Ethereum and solves the inherent flaws of the existing blockchain system. Quantum Chain will continue to gradually form a blockchain economy through the construction of basic platforms, as well as the development and iteration of various product development and commercialization projects, improve industry efficiency, and promote the efficient and coordinated development of society. Quantum Chain defines the blockchain economy.

⑷ If your deposit or withdrawal is slow, please check the confirmation progress on the blockchain browser first

Blockchain browser:

1. BTC transfer progress inquiry (2 confirmations):

https://btc.com

2. BCC transfer progress inquiry (2 confirmations):

https://blockdozer.com

3. ETH transfer progress query (30 confirmations):

https://etherscan.io

4. LTC transfer progress inquiry (4 confirmations):

https://live.blockcypher.com

5. USDT transfer progress inquiry ( 2 confirmations):

https://omniexplorer.info

6. NEO transfer progress query (5 confirmations):

https: //www.antchain.xyz

7. IOTA transfer progress query (1 confirmation):

https://thetangle.org

8. XLM transfer progress query (1 confirmation):

https://stellarchain.io

9. QTUM transfer progress query (6 confirmations):

https://qtumexplorer.io

10. BTS transfer progress query (1 confirmation):

https://www.cryptofresh.com

11. HSR transfer progress query (10 confirmations):

http://explorer.h.cash

12. GXS transfer progress query (1 confirmation):

https://block.gxb.io

⑸ What are the digital currency wallets?

ImToken wallet is the preferred e-wallet for the Ethereum series

I seem to have seen reports some time ago that IM Wallet has moved its headquarters to In Singapore, the total market value of stored digital currencies seems to have reached US$36 billion. Its security is also very high, but one disadvantage is that the handling fees and absenteeism fees for withdrawing and transferring coins are relatively high. The currencies it supports are basically the Ethereum series, and there are currently more than 20 types.

There are many Bitcoin wallets, such as Bitpie, BitExchange and blockchain, as well as light wallets launched by various Bitcoin trading platforms, etc.

At present, most people in the currency circle use mobile apps and PC-side light wallets. The more well-known ones include Freewallet developed by the European team, domestic Im token, etc. I currently use Freewallet more because it has both a PC web page and a mobile app, and supports most mainstream currencies on the market.

It is also very convenient to use. For example, functions such as fiat currency transactions and currency-to-crypto flash swaps that we usually need can be operated directly inside the Freewallet wallet, eliminating the need to trade in the exchange. Many complicated steps. It also performs very well in terms of security, including: Touch ID login, two-factor verification, password lock, IP address tracking, email confirmation after each transaction, daily/monthly transaction limits, etc.

Overall, Freewallet is a very versatile multi-currency wallet that provides much-needed simplicity in the market without compromising on security standards. The interface is very intuitive and easy to understand, and is very friendly to both newbies and experienced players in the currency circle.

Hardware wallets are mainly known for their security. Representative products in the industry include Ledger and Trezor. It looks like a USB flash drive or card. It is inserted into the computer when needed. In normal stateIt is not connected to the network, so only the hardware is not lost, and the assets inside are very safe because hackers cannot attack them. Of course, the disadvantage is also obvious that the hardware is very expensive, ranging from a few thousand to tens of thousands. The price is not friendly to ordinary currency circle friends, and the operation is also relatively complicated.

Bitcoin wallet: Recommended Bitpie is convenient, practical and powerful, and it is one of the few wallets that supports all currencies

Ethereum: Recommended imtoken Not much to say about coins Everyone knows it

EOS: Recommended meet.one and tokenpocket are relatively well-known and have full functions

Other currency wallets are less used in the market, of course excluding the mainnet launch. The later official wallet

The Bitpie wallet supports most currencies on the market, which is what I have always used

There are too many digital wallets on the market now, many Blockchain companies will also produce a wallet when they issue a coin.

Of course, I have counted a few mainstream digital currency wallets here. I hope it will be helpful to the questioner.

Look at this picture first. This picture compares the five most mainstream wallets in China. A comparative analysis was conducted from the four aspects of supported currencies, security, whether it can be traded, and whether there are games. In terms of supported currencies, Anmo Wallet is the wallet that supports the most mainstream currencies. It also has embedded games that can be mined and has self-sustaining private keys. Anmo Wallet is a very good choice in terms of security and supported currencies. However, the trading function is not supported for the time being, and there is room for improvement.

IMtoken is a currency that supports the Ethereum series. It has transaction functions and optional games.

The outstanding feature of Math Wallet is its combination of artificial intelligence, which is very innovative.

Kcash multi-chain wallet is good, Alipay in the future

XMM currency has been doing well recently, can this currency be transferred to the imtoken wallet?

1. How to avoid backdoor problems in wallets?

You can only rely on open source code. Trezor software and hardware are all open source; Ledger is only open source for software, but not for hardware (so you can only trust that it will not do anything); most domestic hardware wallets are Not open source or fake open source.

Taking trezor as an example, newly purchased wallets do not have firmware and require an Internet connection to download the firmware. When downloading the firmware, the hardware wallet will verify the signature of the firmware to prevent the firmware from being tampered with. The public key is hard-coded on the hardware wallet.

The advantage of open source code is that it allows everyone to help the wallet company check whether there are loopholes in the code, and at the same time ensures that there will be no backdoors; the disadvantage is that hackers may be more targeted in cracking attacks on the wallet.

2. How secure are hardware wallets?

You also need to enter a PIN code when using a hardware wallet. If your wallet is lost, you will not be able to transfer coins without a PIN code for a short period of time.

There is a situation where the hardware wallet PIN code is cracked (currently the vulnerability has been repaired in the hardware wallet), but the prerequisite is that the attacker has obtained the physical hardware wallet itself. If your hardware wallet is not lost, it is basically not possible. There is a problem of private keys being leaked.

You do not need to plug your wallet into your computer to transfer money to your wallet. You only need to plug your wallet into your computer to transfer money from your own wallet to others.

During the process of sending money to others, the private key of the wallet will never be transferred to the computer's memory. All calculation processes are completed in the wallet's own hardware chip.

Even if the wallet is plugged into a computer that has been infected or hacked, the private key will not be leaked.

The essence of a hardware wallet is a tool that generates private key/public key pairs in an offline environment. There is no essential difference between using a computer that is never connected to the Internet to generate private key/public key pairs. the difference.

3. What should I do if the hardware wallet breaks down in the future, or the manufacturer goes bankrupt?

The essence of the hardware wallet is to help you generate a pair of public and private keys, and at the same time convert it into A mnemonic phrase composed of 24 English words. With the mnemonic phrase, you can use it to restore your public and private keys. So after generating the mnemonic, you need to save the mnemonic well.

The mapping relationship between public and private keys and mnemonic phrases is a universal protocol, so even if your hardware wallet manufacturer goes bankrupt and the wallet hardware is broken, there is no need to worry. As long as you have the mnemonic phrase, everything will be fine. You can use another manufacturer's hardware wallet to restore the public and private keys.

4. Where to buy hardware wallet?

Never buy a second-hand wallet (to prevent others from tampering with it). It is best to buy it directly from the wallet manufacturer. For example, trezor and ledger can be purchased directly from the official website. There seems to be a coinwallet on Taobao in China that says it is an authorized agent. I don’t know if it is true or not. It is better to buy it yourself from the official website, which is more reliable.

5. Which brand of wallet should I buy?

Currently there seem to be only two recommended brands, trezor and ledger

Trezor is the oldest wallet manufacturer, with trezThe advantage of the or One and trezor model T models is that both the software and hardware are open source. It can be used on PC, but it seems that only Android phones can be used.

The history of the ledger company is shorter than that of trezor. It has two models: ledger nano s and ledger nano The chip is professional grade. The shortcomings are that the hardware is not open source, and the pixels of the LCD screen are relatively low, so rn may be mistaken for m.

After comprehensive consideration, I felt that trezor was more reliable. I placed an order for trezor model T from Meiya, which cost 1,400+ yuan. I received it about half a month later.

I use Huobi wallet

Strictly speaking, there is only one digital currency wallet in China, and that is the dcep wallet. dcep is the legal digital currency of the People's Bank of China. It is issued by the People's Bank of China and can be circulated like banknotes. Others cannot be called digital currency wallets, because whether they are Bitcoin, Ethereum, Yuzi and other so-called digital currencies, they are not legal tender and cannot be circulated like paper money. They do not have the characteristics of currency and can only be called It is a token or digital certificate and cannot be called a digital currency. Therefore, there is only one truly guaranteed digital currency wallet in China.

imToken

imToken is a digital currency wallet that supports ETH and ERC-20 tokens, Bitcoin HD wallet, Segregated Witness, EOS and other tokens on the EOS main network , and a set of mnemonic words can create wallet accounts in multiple currencies, thus saying goodbye to complicated backup management, and it is a multi-chain wallet.

imToken supports the sending and receiving of digital currencies and Ethereum series currency transactions. With the help of blockchain smart contracts, there is no need to trust a third party and the currency exchange can be completed directly on the mobile terminal. The token management function is simple to operate and automatically discovers tokens without adding them manually. It supports one-click search and can easily view and manage multiple tokens.

imToken’s private key is self-sustained, further ensuring security.

Disadvantages: imToken only supports digital currencies based on the ETH main chain, and tokens of its own public chains such as BTC and CTC cannot be stored. When transferring, only ETH is supported as a handling fee, which has certain limitations.

Bitpie

Bitpie Wallet is a new generation blockchain asset comprehensive service platform developed by the Bitpie team. It is based on HD wallet technology, multi-signature and on-chain transactions. Digital currencies can be used easily and safely on BitpieSend and receive Bitcoin easily. The currently supported currencies mainly include BTC, BTC forked coins, ETH, some ERC2.0 tokens, QTUM, HSR, DASH and forked coins SAFE, LTC and forked coins LCH, ZEC, ETC, and DOGE.

Bitpie supports multi-address currency issuance, built-in OTC and exchanges (third-party services), and can trade with users from all over the world. It is more suitable for professional users in the currency circle who have frequent transactions and OTC trading needs. use.

In terms of security, the user controls the private key. After the transaction is completed, the currency is directly kept by the user. If there is no operation for a long time, Bitpie will automatically lock, further improving the security of the wallet.

Disadvantages: For initial users, too many and complex functions are a burden. They only need to simply send and receive digital currencies. Too many complex functions increase the user's learning time and affect the wallet user experience.

Anmo Wallet

Anmo Wallet is a light wallet developed by Hangzhou Anmo Blockchain Technology Co., Ltd. It saves storage space compared to full node wallets. . It is a multi-currency cross-chain wallet that supports tokens such as BTC, BCH, LTC, ETH, ETC, DASH and ERC-20 series. It is currently the most comprehensive currency and a true full-currency wallet. Digital currency wallet.

Anmo Wallet is the only digital currency wallet that supports Chinese mnemonic phrases. It consists of 12 Chinese characters, which is easy to remember and conforms to Chinese people's reading habits.

The biggest feature of Anmo Wallet is that it makes good use of the scalability of light wallets. While managing a variety of digital assets, it also embeds a DAPP list and Anmo Fishpond. In the mining game, the mined tokens are stored directly in the wallet, which is convenient, labor-saving and interesting. It can be said to be a profitable wallet.

Built-in Anmo block browser, each transaction can be queried in real time using the transaction address, block height, and transaction ID, with accuracy.

There is also a market and information DAPP, a multi-functional digital currency wallet.

Disadvantages: There is no trading function yet.

Math Wallet

Math Wallet is a digital wallet that supports ETH, NEO, and EOS Tokens at the same time. It has built-in faces, voiceprints, living bodies, and other biometrics. Identification technology to ensure asset security, which is unique among current wallets.

Math Wallet supports mainstream exchange interfaces such as Binance, Huobi, GateIO, Okex, etc., and automatically obtains position data.

The UI design of Math Wallet focuses on human-computer interaction, interface logic, and interface beauty.The users have a good experience. You can know the functional process from the first operation, allowing users to understand how to interact with the software in an intuitive way. The interface design has a unified style of Maizi.

Disadvantages: Few currencies are supported. In the application module, each application or activity section is the width of a mobile phone screen, and a maximum of 2.5 applications can be displayed on the same screen. Although it looks very generous and beautiful, it is more cumbersome to find an application and you need to keep scrolling down

AToken

AToken is an application that supports cross-chain swaps of multiple currencies. The mobile wallet is safe and convenient. Currently, it supports multiple main chain currencies such as BTC, LTC, ETH, ETC, DOGE, and EOS; multiple forked currencies such as BCD, BTG, BCH, and SBTC; and supports all Ethereum ERC20 tokens.

Users hold their own private keys, which are multiple-encrypted and stored in the APP. They do not access the server in any form, and others cannot touch your digital assets; the wallet adopts a 5-layer HD, horizontal isolation, and vertical defense architecture; Apply algorithm encryption technologies such as PBKDF2 and SHA-512. At the same time, AToken implements the transaction acceleration function of the wallet and supports the transaction acceleration of Bitcoin and Ethereum.

Disadvantages: There is currently no market information in the wallet, making it inconvenient for users to use.

⑹ What are the digital currency wallets and how to choose a digital currency wallet

There are many digital currency wallets. Here are a few wallets.
Anmo Wallet
Anmo Wallet is a light wallet developed by Hangzhou Anmo Blockchain Technology Co., Ltd. It saves storage space compared to full node wallets. It is a multi-currency cross-chain wallet that supports tokens such as BTC, BCH, LTC, ETH, ETC, DASH and ERC-20 series. It is currently the most comprehensive currency and a true full-currency wallet. Digital currency wallet.
Anmo Wallet is the only digital currency wallet that supports Chinese mnemonic phrases. It consists of 12 Chinese characters, which is easy to remember and is in line with Chinese people's reading habits.
The biggest feature of Anmo Wallet is that it makes good use of the scalability of light wallets. While managing a variety of digital assets, it also embeds a DAPP list and the Anmo Fishpond mining game. The mined tokens are stored directly in the wallet, which is convenient, labor-saving and interesting. It can be said to be a profitable wallet.
Embedded Anmo block browser, each transaction can be queried in real time using the transaction address, block height, and transaction ID, with accuracy.
There is also a market and information DAPP, a multi-functional digital currency wallet.
Bitpie
Bitpie Wallet is a new generation blockchain asset comprehensive service platform developed by the Bitpie team. Based on HD wallet technology, multi-signature and on-chain transactions, digital currencies can be used easily and safely.Send and receive Bitcoin easily on Bitpie. The currently supported currencies mainly include BTC, BTC forked coins, ETH, some ERC2.0 tokens, QTUM, HSR, DASH and forked coins SAFE, LTC and forked coins LCH, ZEC, ETC, and DOGE.
Bitpie supports multi-address currency issuance, built-in OTC and exchanges (third-party services), and can conduct transactions with users from all over the world. It is more suitable for professional users in the currency circle who have frequent transactions and OTC trading needs.
In terms of security, the user controls the private key. After the transaction is completed, the currency is directly kept by the user. If there is no operation for a long time, Bitpie will automatically lock, further improving the security of the wallet.
Disadvantages: For initial users, too many and complex functions are a burden. They only need to simply send and receive digital currencies. Too many complex functions increase the user's learning time and affect the wallet user experience.
AToken
AToken is a mobile wallet that supports multi-currency cross-chain exchange and is safe and convenient. Currently, it supports multiple main chain currencies such as BTC, LTC, ETH, ETC, DOGE, and EOS; multiple forked currencies such as BCD, BTG, BCH, and SBTC; and supports all Ethereum ERC20 tokens.
Users hold their own private keys, and the private keys are stored in the APP with multiple encryption. They do not access the server in any form, and others cannot touch your digital assets; the wallet adopts 5-layer HD, horizontal isolation, and vertical defense architecture; uses PBKDF2, SHA -512 and other algorithm encryption technologies. At the same time, AToken implements the transaction acceleration function of the wallet and supports the transaction acceleration of Bitcoin and Ethereum.
Disadvantages: There is currently no market information in the wallet, making it inconvenient for users to use.

⑺ What channels can be used to query Bitcoin’s on-chain data?

Blockchain is an important concept of Bitcoin. It is essentially a disintermediated database. At the same time, as the underlying technology of Bitcoin, it is a series of data blocks generated using cryptographic methods. Each data block contains information about a Bitcoin network transaction, which is used to verify the validity (anti-counterfeiting) and generation of its information. Next block.

The data on the Bitcoin blockchain is what we call on-chain data, which generally includes: Bitcoin active addresses, new addresses, and continuous active addresses. , reactivation address, on-chain transaction volume, number of on-chain transactions, TSP, on-chain transaction transfer fees, large transfers, mining difficulty and other data.

We generally use a blockchain browser to query the on-chain data of certain blockchains, bit The more commonly used blockchain browsers for coins are:

https://www.blockchain.com/explorerhttps://blockexplorer.com/https://insight.bitpay.com/https://btc.com/

More areas Blockchain projects, blockchain investments, blockchain applications, and blockchain celebrity related information are all available at Lianxiaohu: https://www.lianxiaohu.com/

⑻ The blockchain browser is What

Blockchain Explorer is a website.

Blockchain browser is different from traditional browsers. Ordinary browsers can query various information and jump to various websites, but blockchain browsers have to say In fact, it is a website. The blockchain browser is a tool specifically designed for users to browse and query information on the blockchain.

For example, search transaction records, detailed information of a certain block, the height of the current chain, etc. You can also query the balance or transaction details through the wallet address or transaction ID. Therefore, the blockchain browser is not an application, nor is it a program built on the public blockchain chain. Simply put, it is a website that can query blockchain data.

In fact, each blockchain system has its own specific browser, and users cannot conduct cross-chain queries through the blockchain browser. If you want to query some information data of a certain blockchain system, you have to go to the browser of the blockchain to query. Take a simple example, the Bitcoin blockchain browser can only query Bitcoin blocks, and the Ethereum blockchain browser can only query Ethereum.

The blockchain browser is like a window into the digital currency. Through the blockchain browser, you can see what is happening inside the digital currency, and each transaction is recorded in detail. The confirmation process of a block and the generation and distribution process of digital currency, and completely record the circulation of digital currency between each block, thereby more completely and openly disclosing the stock, increment and change of hands of digital currency. rates and other information.

⑼ Summary of addresses of various blockchain browsers

1. USDT-BTC browser:
1. https://www.omniexplorer.info/ < br /> 2. https://www.oklink.com/usdt

2. BTC browser:
1. https://btc.com/
2. Bitcoin/Transaction https://blockchair.com/
3.btc JSON-RPC: https://github.com/btcsuite/btcd/blob/master/docs/json_rpc_api.md#getbestblockhash

3. ETH browser: