vandal | Static program analysis framework for Ethereum smart | Blockchain library
kandi X-RAY | vandal Summary
kandi X-RAY | vandal Summary
Vandal is a static program analysis framework for Ethereum smart contract bytecode, developed at The University of Sydney. It decompiles an EVM bytecode program to an equivalent intermediate representation that encodes the program's control flow graph. This representation removes all stack operations, thereby exposing data dependencies that are otherwise obscured. This information is then fed, with a Datalog specification, into the Souffle analysis engine for the extraction of program properties. A more comprehensive description of the Vandal Framework is available on the Wiki, along with a getting started guide. Vandal is licensed under the BSD 3-Clause License.
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Top functions reviewed by kandi - BETA
- Merges duplicate blocks
- Return the list of blocks with the given index
- Adds the edge between head and tail
- Adds a basic block
- Checks if the given jump destination is valid
- Checks the validity of the given variables
- True if this instruction is halts
- Perform a stack analysis
- Perform stack analysis
- Export the module
- Add missing split edges
- Remove unreachable blocks from the graph
- Acquire tsv settings
- Add jump sites to the CFG
- Visit the given target
- Apply the operands
- Hook up the stack of TACs
- Export the graph to a file
- Runs seffle on a given job
- Clone the blocks of the block
- Calculate the stack size
- Merges unreachable blocks
- Convert evm_cfg into TACBlock
- Parse the disassembly
- Parse EVM block
- Create a list of EVM blocks from the given ops
vandal Key Features
vandal Examples and Code Snippets
Community Discussions
Trending Discussions on vandal
QUESTION
SparkNotes:
I'm pulling in a crime API to see hotspots. Certain crimes will not be logged with a lat/long, therefore, are not shown up in standard (free) crime apps.
- Lat/Long pins I've overridden to a new lat/long don't show up on first load/or at all. (google-maps-react) (Confirmed lat/long is valid per crimes in near areas.)
- Normal pins that had an existing lat/long show up fine/show up as soon as it loads. (Even though it's all the same array of data.)
- I loop through the blank lat/long and replace the lat/long with a rough lat/long of the area just so it shows up. In my console log I can confirm that I've overriden the blank lat/long.
- I want these records to understand the neighborhoods/potentially avoid moving into a hotspot of specific crimes.
API Normal:
https://data.seattle.gov/resource/tazs-3rd5.json?$limit=20000&$offset=20000&$order=offense_id
Full Use Case (Which doesn't work for at all pins): https://data.seattle.gov/resource/tazs-3rd5.json?crime_against_category=PERSON&mcpp=MAGNOLIA&offense_parent_group=SEX%20OFFENSES
Request for help: Can someone please help on how to get these overridden pins to show up consistently?
Things I've Tried: Force update/having multiple refreshes etc/decreasing async time. Those work for when I put in specific crime report number, but if I search for kidnapping/peeping tom, they will not pull with the rest of the person crimes.
I can confirm that if I just load every crime in that API, the map logs all of them (except the ones I need), It's like a pin per foot of street, but the pins in the categories I need don't show up. (So I don't believe it's a volume issue.)
Code for API Data:
...ANSWER
Answered 2021-Apr-27 at 03:04It seems that there's a timing issue when importing your places
data from crimedata.js
in the first load of the code. I can see that the places
value is empty [] in the initial run then the loading of your places in your crimedata.js
will follow after some time. You can see this in the console log in my working code.
To handle this, I used state variables to hold the value of the updatedPlaces
data then in componentDidMount
function, I used setTimeOut and set value of updatedPlaces
state variable from the imported places data that is now available.
I then used this state variable as a condition for the markers to load.
Here's the code snippet:
QUESTION
I am currently practicing making a simple website. I have a problem in the navigation bar above my website. When I scroll further down my website, their color when I hover and their responsiveness disappears. Here's a pic to help you understand my problem.
I don't know if I use some codes right but here's my code, you can leave a tip or you can also add on how the code works so I can correct my mistake.
...ANSWER
Answered 2021-Mar-27 at 01:33If you add z-index: 1;
to .topnav
, your problem will be solved. Because, topnav
falls under the other contents that comes after topnav
such as text, anchor est.
QUESTION
I'm trying to parse this markdown file. I would like to capture the sections between the headings. What's wrong with my regex?! I'm having trouble capture multiple lines of content.
Here is the regex I wrote.
...ANSWER
Answered 2021-Mar-17 at 18:26For the example data, one option could be omitting the alternation |
as the second alternative would match a single line.
Then you could use a repeating pattern inside a capture group to match all lines that do not start with #
Note that this is for the example data, for advanced parsing of a markdown file you could look into a parser.
QUESTION
I'm learning web scraping with python, and as a way to do an all-in-one exercise I'm trying to make a game catalog by utilizing Beautiful Soup and requests modules as my main tools. Though, the problem lies while handling sentences related to requests module.
DESCRIPTION:
The exercise is about getting all genres tags used for classifying games starting with A letter in the first page. Each page shows around or exactly 30 games, so if one wants to access a specific page independently of a letter, has to access to an url in this form.
- https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/1
- https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/2
- https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/3
And so on... As a matter of fact, each alphabet letter main page has the form: URL: https://vandal.elespanol.com/juegos/13/pc/letra/ which is equivalent to https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/.
Making my way to scrape genres from some pages is not big deal but what if i want to scrape them all of a letter, how do i know when I'm done scraping genres from all games of a letter?
When you request the url https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/200 for example, you get redirected to a corresponding letter main page, which means the first 30 games, since in the end it doesn't have more games to return. So while bearing that in mind.. i was thinking about verifying the status_code got from requests.get() response, but get a 200 as status code whereas when analizing packages received with Chrome Tools i got 301 as status code. In the end of the program i save to a file the scraped genres.
And here's the code:
...ANSWER
Answered 2021-Feb-11 at 10:11I simply would not just rely on a status code. You might get a non 200
status even for pages that are there. For example if you exceed a certain amount described in their robots.txt
, or if your network has a delay or error.
So, to reply to your question: "How do I ensure that I scraped all pages corresponding to a certain letter?". To ensure it you may save all the "visible text" as in this reply BeautifulSoup Grab Visible Webpage Text and hash its content. When you hit the same hash, then you know that you already crawled/scraped that page. Therefore you can then incrementally go on the next letter.
As an example of hash snippet, I would use the following:
QUESTION
Why does my code act like I'm answering yes to a question when I'm answering no?
In this part of my code:
...ANSWER
Answered 2020-Nov-13 at 19:23This line is wrong:
QUESTION
Input JSON is
...ANSWER
Answered 2020-Sep-01 at 16:54Use ++
to concat strings for the Desc field i.e.
QUESTION
ANSWER
Answered 2020-Aug-05 at 07:45You have a partial order only not a total order (not all states list all others in their superiors
/inferiors
list), so your score calculation doesn't work. States end up with a score depending on how often they were mentioned, not what their relative order is. You'll need to implement a topological sort algorithm.
QUESTION
im using keras for a multiclass clasffication of text-comments problem, this one, to be precise: https://www.kaggle.com/c/jigsaw-toxic-comment-classification-challenge
There is six classes, and the observations could fall in all of them. I have trained my model(LSTM) , using binary-cross-entropy as my loss function
...ANSWER
Answered 2020-May-25 at 15:05The prediction values that you are seeing are not high numbers. On the contrary, they are negative exponentials, for example the first one is equal to 0.0079924166.
In order to correctly explain these value, it is necessary to know the activation function that is used by the model in the output layer. For example:
- if you were using the
softmax
activation function, the output values would represent the probability of the input sample to belong to each of the classes, and they would sum up to 1. - if you were using the
sigmoid
activation function (as it looks like in this case), the outputs would be values between 0 and 1, which would be independent one from the other.
QUESTION
I have a series grouped on districts -> crime types -> count of crimes:
...ANSWER
Answered 2020-Feb-16 at 10:56I believe you need Series.sum
per first level PdDistrict
- for sum values per first level of MultiIndex
:
QUESTION
I want the two output values from DMN row, be sent to BPMN context, e.g DMN.output.var1=val1, DMN.output.var2=val2.
Input: (SPACE=LAW, THING=VANDALISM)
Output: (ROUT_TO_DEPT=BY_LAW, OUT_CATEGORY=INSPECTION)
These two variables must be in context, and available to next step in BPMN.
However I'm getting an error, how to make it happen?
Error
Stacktrace:
...ANSWER
Answered 2020-Jan-20 at 16:01The mapping to resultList is used to map a list of rows with multiple output columns. Switching to singleResult was the right direction. You are using a hit policy "First" (one rule/ row only), so the map decision result property can only be singleEntry (one output column) or singleResult (several output columns).
After mapping the decision result to a singleResult, you can use the Input/Output tab in the property panel to map the result entries to process variables:
In the text field of the output mapping you can use unified expression language, e.g. ${deptRoureDetail.get('ROUT_TO_DEPT')}
to access the result variable (in your case deptRoutDetail) of type Map and access the desired fields (ROUT_TO_DEPT, etc) by their keys.
Full example:
a) BPMN
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install vandal
You can use vandal like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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