Ethereum 21 unconfirmed transaction

1.

If you want to query the transaction records on the main network, you can use Etherscan. However, if you build your own private chain, how should you query the transaction records

the answer is that you need to listen to the logs on the chain, save them in the database, and then query them in the database. For example:

< pre t = "code" L = "Java" > varaddr = & quot& quot;< br />varfilter=web3.eth.filter({fromB lock:0 ,toBlock:' latest', address:addr });< br />filter.get(function(err,transactions){
transactions.forEach(function(tx){
vartxInfo=web3.eth.getTransaction(tx.transactionHash);
/ / at this time, the transaction information txinfo can be stored in the database
})< br />});

Web3. Eth. Filter() is used to monitor the log on the chain, and Web3. Eth. Gettransaction() is used to extract the information of the specified transaction. Once the transaction information is obtained, it can be stored in the database for query

recommend a practical introction, you can see: Ethereum tutorial

2. As a bitcoin trading platform, fire coin has won a round of 10 million RMB capital investment from Zhenge fund, Dai Zhikang, Sequoia Capital (shareholders of many global well-known companies such as apple and Alibaba). Fire coin implements strict risk control management and operates stably. As of the end of 2016, the accumulated turnover of fire currency reached 200 billion yuan
on September 15, 2017, huoyuan.com announced that registration and RMB recharge services will be suspended from now on, and all users will be informed before September 30 that they will stop trading. At the same time, all transactions of digital assets against RMB will be graally stopped before October 31. Fire money network said it will stop virtual currency trading on October 31, 2017. You can contact the fire coin net official consultation refund question
response time: March 11, 2021. Please refer to the official website of Ping An Bank for the latest business changes
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3. As long as sent out should be no problem, payment should be seven working days did not receive, should be able to return, if received no payment can find Taobao customer service help, hope to help you

4. Fund transactions need to be confirmed in two working days, and you can inquire in two days.

5. Unknown_Error

6. When you log in, the Margin Monitoring Center will let you confirm the bill. You can click confirm or adjust the settings so that it doesn't pop up. Or you can place an order with Wenhua's push to talk. There must be no problem when trading. The market fluctuates quickly when opening in the morning, because the software brings problems. More communication in the future

7. When you swipe the card, you enter the amount, but you will not succeed if you do not confirm your signature.

8. You can Taobao complaints, find Taobao customer service to ask about it.

9. It's a transaction that hasn't been packaged into a block. When a transaction is packaged into a block and becomes a permanent part of the blockchain, a confirmation is generated“ "Six confirmations" means that the transaction has been packaged into a block, and there are five blocks behind the block on the blockchain, which provides more guarantee for the legitimacy of the transaction.

10.

When there are still unfinished transactions with Huabei payment, Huabei cannot be closed

only for orders paid with Huabei, when the receipt is not confirmed, the Huabei bill is not recorded, and the user who owes Huabei and borrows Huabei cannot close Huabei. Other payment methods with unconfirmed receipt will not affect the closing of Hua

you can manually confirm the receipt of goods, and after you have paid all the arrears, you can close the Hua

extended information: 25 months on

8, Alipay made a supplement to the update by official micro-blog, saying that as long as you have a balance in your Alipay account, or if you have associated with the balance treasure, you will not be canceled if you do not login for any time. p>

in addition, no matter how long a user has not logged in, his account will not be cancelled, "don't think about it."

Alipay also pointed out that, according to the "non bank payment institutions' network payment business management regulations", Alipay shall not open Alipay accounts for financial institutions and other institutions engaged in credit, financing, financing, guarantee, trust, currency exchange and other financial businesses. p>