hashrate | Bitcoin mining profit calculator based on difficulty | Cryptography library
kandi X-RAY | hashrate Summary
kandi X-RAY | hashrate Summary
Bitcoin mining profit calculator based on difficulty. Uses difficulty data from the [blockchain.info API] and extrapolates data with simple linear regression (via. [linefit] If used in production, I strongly encourage these results to be verified with the [bitcoinx profit calculator] Note: this calculator currently uses a static 25 bitcoin reward. It won’t work very well for calculations [before 2013 or after 2016] Note also that I designed this to be used in Rails, so it caches the json from blockchain’s API for six hours before requesting it again.
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QUESTION
I read the documentation https://docs.influxdata.com/influxdb/v2.0/visualize-data/variables/
I thought great that will be a piece of cake.
I take a look at an existing query variable named bucket:
ANSWER
Answered 2021-Apr-10 at 20:44I don't think you can use variables within variables, so things like v.timeRangeStart that you can use in a dashboard query can't be used to define another dashboard variable.
You can use duration literals though, like -5d or -2h in your range() call though.
QUESTION
I have spent more than 3 hours trying to research and find a solution to this. I have looked at numerous other answers on StackOverflow, and nothing was able to help. List of my research at the bottom
I am trying to access a public API.
When I do curl it is fully accessible.
When I try to access it in a React app, I get an error.
Here is my code:
...ANSWER
Answered 2021-Apr-07 at 07:54CORS requirements are set by the host, there is nothing you can do about it except asking if they will allow CORS headers.
A workaround is using a proxy. So you'll make a request on your own server and pass the result back to your client.
Here is an example with a free proxy, though I do not recommend doing this in production:
QUESTION
I want to calculate the time it will take to break a SHA-256 hash. So I research and found the following calculation. If I have a password in lower letter with a length of 6 chars, I would have 26^6passwords right?
To calculate the time I have to divide this number by a hashrate, I guess. So if I had one RTX 3090, the hashrate would be 120 MH/s (1.2*10^8 H/s) and than I need to calculate 26^6/(1.2*10^8) to get the time in seconds right?
Is this idea right or wrong?
...ANSWER
Answered 2021-Mar-07 at 16:48Yes, but a lowercase-latin 6 character string is also short enough that you would expect to compute this one time and put it into a database so that you could look it up in O(1). It's only a bit over 300M entries. That said, given you're 50% likely to find the answer in the first half of your search, it's so fast to crack that you might not even bother unless you were doing this often. You don't even need a particularly fancy GPU for something on this scale.
Note that in many cases a 6 character string can also be a 5 character string, so you need to add 26^6 + 26^5 + 26^4 + ..., but all of these together only raises this to around 320M hashes. It's a tiny space.
Adding uppercase, numbers and the easily typed symbols gets you up to 96^6 ~ 780B. On the other hand, adding just 3 more lowercase-letters (9 total) gets you to 26^9 ~ 5.4T. For brute force on random strings, longer is much more powerful than complicated.
To your specific question, note that it does matter how you implement this. You won't get these kinds of hash rates if you don't write your code in a way to maximize the GPU. For example, writing simple code that sends one value to the GPU to hash at a time, and then compares the result on the CPU could be incredibly slow (in some cases slower than just doing all the work on a CPU). Setting up your memory efficiently and maximizing things the GPU can do in parallel are very important. If you're not familiar with this kind of programming, I recommend using or studying a tool like John the Ripper.
QUESTION
I am writing a python script which calls the API of ethermine.org, then I am using telegraf to input the data into influxdb and it is being displayed on grafana. Influxdb and telegraf accepts json format and the first two API pulls which I did work, they display the data in the following format(I put x's in place of the actual values that get returned):
...ANSWER
Answered 2021-Mar-01 at 10:02When working with requests.get() on an API that returns data in JSON format, you probably want requests to handle the data for you rather than accessing it as text and parsing it manually.
Since the returned JSON object contains nested JSON objects, you would have to manually parse each of the nested objects (e.g. using json.loads()) when you get it as text.
In the call to requests.get(urlPoolStats), the returned JSON object contains another JSON object, which is not parsed in your case, when calling json.loads(statsPool.text), which is most likely why it's failing when you try to access price.
A call to requests.get() returns a Response object which implements a json() method which will parse the data correctly for you and return it as a Pyton dict with all the nested JSON objects accessible as keys in the dict.
In other words, instead of
QUESTION
I am trying to build a GUI frontend for a very simple windows terminal application (binary available here https://github.com/00-matt/randomx-stress/releases/download/200109/randomx-stress-windows-200109.zip), and start the terminal application as a subprocess using popen and feed the output into a queue, then read the queue and put the output into the tkinter GUI. No matter what I try though I am unable to get absolutely anything from stdout or stderr from the spawned subprocess. This is a stripped down version of my code:
...ANSWER
Answered 2020-May-11 at 19:46Programs based on C libraries treat stdout differently depending on whether its a terminal (assumes user wants data on a line by line basis) or a pipe (block buffer for efficiency). On unix-like systems, a program can be tricked into thinking it is running against a terminal with a pseudo-tty device. On Windows, Microsoft has never implemented an equivalent technology. Subprocesses will block buffer.
You can get around that in the called program by flushing stdout after write. This is done automatically in C++ with endl. In your case that would be:
QUESTION
I recently swapped over from requests to aiohttp because I couldn't use it in asyncio loops.
The swap went perfectly and everything goes well except for one thing. My console is full of
...ANSWER
Answered 2018-Feb-17 at 12:45aiohttp is trying to do the right thing and warn you of incorrect Content-Type, which could at worst indicate that you are not getting JSON data at all, but something unrelated, such as the HTML content of an error page.
However, in practice many servers are misconfigured to always send the incorrect MIME type in their JSON responses, and JavaScript libraries apparently don't care. If you know you're dealing with such a server, you can always silence the warning by invoking json.loads yourself:
QUESTION
I am attempting to inject code into a webpage. Here is the situation:
api url: https://blockchain.info/q/hashrate
calculation: ((hashrate * 1249)/(27518 * 1000000)
then post calculation result to page.
Here is the javascript I have created so far:
...ANSWER
Answered 2019-May-15 at 12:25You don't really need jQuery:
QUESTION
Trying to work around the blockchain using Ethereum, I'm facing problems when trying to interface with a deployed contract. What I would try to achieve is to call a method to display information added to a private blockchain deployed locally using Geth.
I can't call any function from my smart contract and I've been wondering if I'm doing something wrong... Could someone tell me how to achieve a simple call to one of the method from this contract? let say display the existing agencies, or the agency name from which the user is part of.
My contract: agency.sol
...ANSWER
Answered 2019-Apr-22 at 18:53I think you should try something like this-:
QUESTION
I am writing a makeshift little private 'block chain' for illustrative purposes to be used as a teaching tool. I have all the core functionality ironed out, but I was thinking about some of the more peculiar aspects of block chain and found myself wondering about longs in java. The 'miner' method I have built into the application increments a nonce value of type long with the ++ operator until a condition is met. My question is, if I wanted to avoid (or at least greatly prolong) the chance of exhausting the integer nonce space (2147483647), if I initialized the starting nonce value I pass to the miner method with Nonce = 0L; could I increment it with the ++ operator and make use of the full long literal range?
It's my understanding that Bitcoin uses a special input value into the transaction, and/or some miners will slightly change the time stamp for "ExtraNonce" but since this is just for illustrative purposes I don't want to go as far as including something similar into the app.
I can provide code snippets if anyone wants to see them for any reason, any thoughts would be greatly appreciated!
Code below:
(please don't heckle me on my questionable if/else control logic, this isn't a legitimate production application and I am still a novice in java)
This is the code from the launcher class that calls the miner method:
...ANSWER
Answered 2019-Apr-06 at 23:30Yes, for long ++ the instruction set ladd will be used (iadd for int).
Since your question totally changed with your edit and I still saw it..
QUESTION
I am writing a java application that will hash a series of input values repeatedly until a condition is met. I have accomplished this by nesting a series of if/else statements inside a while loop. I want to be able to print the hash rate to the terminal every 3 seconds while the application is actively hashing, and not repeatedly until the condition is met. I have tried using ExecutorService and scheduling a TimerTask but neither worked the way I wanted them to as they both kept on executing after the condition that should have stopped them was met. I know I am missing something but I don't know what ):
I've included a small snippet, feel free to ask for any information you may think is relevant.
Any help would be greatly appreciated!
I tried using a TimerTask like this:
...ANSWER
Answered 2019-Apr-06 at 18:13I have a few suggestions:
I personally would prefer using
breakinside awhile(true)loop instead of of a loop variable. I feel that it makes the code more readable;You are re declaring the
Timerinside the loop, which means that a new timer is created each iteration of the loop. You need to create the timer once, outside the loop.
The Timer variable needs to be final to allow you to call timer.cancel() inside the run function of the TimerTask. If you plan on terminating the timer outside the run function, then the Timer variable need not be final.
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