the front end uses web3js, to call a simple contract function with an error. But it can be successful on remix.
here is the contract function, which is a simple loop, but there is also an error. What"s going on? Thank you.
metamask
the front end uses web3js, to call a simple contract function with an error. But it can be successful on remix.
here is the contract function, which is a simple loop, but there is also an error. What"s going on? Thank you.
metamask
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about the ethernet square wallet. metamask is a Google plug-in. All created accounts, transfers and so on communicate through json rpc, so ask if the server also keeps this copy of the private key. ...
Why does the pbft algorithm require N > = 3f + 1? or what happens when the primary node is a fault node? ...
I have the idea of a blockchain project. I don t want to build my own private chain. are there any good public cloud services? To be able to support smart contracts ...
< H1 > github.com hyperledger fabric vendor github.com miekg pkcs11 < H1 > .. work src github.com hyperledger fabric vendor github.com miekg pkcs11 pkcs11.go:26:10: fatal error: ltdl.h file not found < H1 > include < ltdl.h > < H1 > ^~~~~...
Object obj=new Object(); Object obj2=obj; synchronized(obj){} synchronized(obj2){} what if this is the case? Object obj=new Object(); synchronized(obj){} obj=new Object(); synchronized(obj){} ...
When runs first-samples, uses docker-compose- f docker-compose-cli.yaml up-d to start the network, the cli container cannot be created. Open the logs message of the cli container 2018-04-13 11 br 31br UTC [msp] GetDefaultSigningIdentity-> DEBU 00b Ob...
the following error occurred while compiling ckpool: should not, ah, the same code, I did not appear in another version of the compilation should be the cause of the environment, added CFLAGS plus-M32 also reported an error, solve!? ...
if an array is defined in the smart contract, and the append method. So to read the latest value of this array, do you need to traverse the relevant transactions in the entire block chain and read out all the append (and possibly delete) to finally get t...
data in ipfs cannot be tampered with or deleted, and many blockchain projects encrypt data and store it in ipfs. so, if the secret key of encrypted data is leaked, won t all encrypted data be leaked as well? How to stop the loss? ...
recently, I have been looking at something related to Ethernet Fang. There is a question about testing network mining that is not clear, as follows: I use miner.start () to dig mines here, young and old, but when I go to Ropsten Testnet , I ca...
if an array is defined in the smart contract, and the append method. So to read the latest value of this array, do you need to traverse the relevant transactions in the entire block chain and read out all the append (and possibly delete) to finally get ...
what is the relationship between BIP32 Extended Public Key and Pubic Key? Can you change it? for example: BIP32 Extended Public Key: xpub69RogXjzChBZoR8iyx4YoSgFcECGTDM8vV28YAnFHXYpNCxuphieARWjPk4Yd4EvPsugHAcgYS8E3o2fftsFaPVuMc6f48fRuhr7GkRQz3M P...
hi I am now working on a trading platform . There are a large number of tokens on the platform, which may be raised by a person several times, and the number is the same. Then the administrator checks all the coins on this page, and then confirms that...
in Bitcoin, the block chain consensus mechanism uses the longest chain selection confirmation process that POW, requires six blocks. suppose that the number of all nodes that can be detected is 10000. If someone maliciously accesses 20000 full nodes and...
Mist wallet account: 0xB17000eB180dABEF81Eb110D175e096AF39C1203 has a balance under the Ropsten Testnet network. [the browser has a balance] https: ropsten.etherscan.io . Geth client: start script: geth-- rpc-- rpcapi "db,eth,net,web3,perso...
recently, I need to make a K chart of the trend of a trading platform. I came into contact with this thing for the first time, and now I know that a lot of people use Kline and tradingview. More inclined to tradingview. There are a few languages support...
<style> span { display: inline-block; font-size: 12px; } < style> <div> <span>hello < span> <span>world< span> < div> where did the extra height come from? ...
now many projects are under the banner of blockchain projects. is not provided, so it is the same as the general project. Why is the blockchain project? so how do I know if this project is a blockchain project? What can you prove? ...
problem: OOM appears when building a private chain and starting to dig a mine. Memory keeps growing until the geth process is killed < H2 > build the private chain of Ethernet Square < H2 > Dockerfile ----------------------------------- FROM ubuntu ...
in theory, more than 51% of the computing power can be tampered with. Many of the federation chains are made in the form of the same platform s own servers. Can it be said that 100% of the computing power is in the hands of this platform, and it is poss...