Categories
Bitcoin Cryptocurrency Mastering Development

Having trouble finding wallet.dat

Where is the data folder for Bitcoin-Qt? Windows: %APPDATA%\Bitcoin (This defaults to C:\Documents and Settings\YourUserName\Application data\Bitcoin on Windows XP and to C:\Users\YourUserName\Appdata\Roaming\Bitcoin on Windows Vista, 7, 8, and 10.) Whereas mine looks like this: C:\Users\YourUserName\Appdata\ Then my choices are: local, local low, roaming, If I click roaming I get Identities- In this folder is a […]

Categories
Bitcoin Cryptocurrency Mastering Development

Financial Department Bitcoin

I wanted to send bitcoins to my wallet from my trading account and did not receive anything. A short time later I got from Fiancial Department Bitcoin received the following message: Your payment of BITCOINS is ready to be processed and is already on BLOCKCHAIN. This department wants to pay me bitcoins for a fee […]

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Bitcoin Cryptocurrency Mastering Development

Can a wallet/exchange provider ask for transaction details

My question has two parts, Am I obligated to share transaction details with my wallet/exchange provider for any payment I made to an individual, like subscription to a website? Irrespective of the above point, If I pay for a subscription using Bitcoins to someone, and the recieving party misuse the coins for something illegal unknown […]

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Cryptocurrency Ethereum Mastering Development

How to find the address of the contract owner?

I’m under the impression that the owner of the contract is simply referred to as accounts[0] in Truffle’s testing environment, but I’m getting the error by the modifier that the caller of a certain function is not the owner. I have instantiated contract A and contract B and the following code is in contract B: […]

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Cryptocurrency Ethereum Mastering Development

GDPR notification emails

We are conducting a research to understand how blockchain service providers and developers communicated GDPR to their users via email and how their users perceived GDPR and such email communications. We hope that a better understanding will help the whole sector to find better ways to make blockchain systems more GDPR friendly. In this context, […]

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Cryptocurrency Ethereum Mastering Development

interesting smart contract on ethereum. What about a distributor contract.?

came up with a funny idea. Make a smart contract that would distribute funds automatically between all addresses that sent transactions to it. An approximate algorithm is this: when an incoming transaction arrives, the smart contract reads from the blockchain the addresses of all transactions entering it, at the current moment and sends them a […]

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Cryptocurrency Ethereum Mastering Development

Contract not returning error to React Interface

I have a contract which I’ve tested with Mocha and Remix and is working just fine. The problem is when I’m running it with my React Interface. When I call a function in my solidity contract that checks if the account exists, in mocha and remix it returns an error as expected, but in React […]

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Linux Mastering Development

Replacing key attribute by another

I would like to replace my ‘²’ key with “ᵉ” (UNICODE 1D49). Is it possible to remap any key easily knowing the Unicode of a symbol ?

Categories
Linux Mastering Development

Why do some systemd unit filenames end with @?

Some applications, like ssh have a unit file that ends with @, like ssh.service and ssh@.service. They contain different contents, but I cannot understand what exactly is the difference in functionality or purpose. Is it some naming convention I’m not aware of?

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Linux Mastering Development

Manjaro VM does not create user and boots into Manjaro Live Installation

I have installed Manjaro XFCE on a virtual box VM in Windows 10. During the installation process I created a user and a password, as I would with any other install. Once the install completes, I remove the install iso from the vm. When I subsequently load up Manjaro in the VM, the user I […]