vandal | Static program analysis framework for Ethereum smart | Blockchain library

 by   usyd-blockchain Python Version: Current License: BSD-3-Clause

kandi X-RAY | vandal Summary

kandi X-RAY | vandal Summary

vandal is a Python library typically used in Blockchain, Ethereum applications. vandal has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

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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            kandi-support Support

              vandal has a low active ecosystem.
              It has 135 star(s) with 37 fork(s). There are 14 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 28 open issues and 10 have been closed. On average issues are closed in 73 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of vandal is current.

            kandi-Quality Quality

              vandal has 0 bugs and 0 code smells.

            kandi-Security Security

              vandal has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              vandal code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              vandal is licensed under the BSD-3-Clause License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              vandal releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              vandal saves you 1713 person hours of effort in developing the same functionality from scratch.
              It has 3794 lines of code, 332 functions and 26 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed vandal and discovered the below as its top functions. This is intended to give you an instant insight into vandal implemented functionality, and help decide if they suit your requirements.
            • 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
            Get all kandi verified functions for this library.

            vandal Key Features

            No Key Features are available at this moment for vandal.

            vandal Examples and Code Snippets

            No Code Snippets are available at this moment for vandal.

            Community Discussions

            QUESTION

            google-maps-react - Specific Pins not Showing up until Click
            Asked 2021-Apr-27 at 03:04

            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

            Specific Items: https://data.seattle.gov/resource/tazs-3rd5.json?$where=report_number%20in(%272020-022388%27,%272020-044620%27,%272020-043813%27,%272020-029645%27,%272020-901621%27)

            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 03:04

            It 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:

            Source https://stackoverflow.com/questions/67247865

            QUESTION

            When I hover to a link with color red, The color and responsiveness of the link disappears when I go further down the website
            Asked 2021-Mar-27 at 03:31

            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 01:33

            If 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.

            Source https://stackoverflow.com/questions/66826001

            QUESTION

            How do I capture multiple lines between to hashtags using Regex?
            Asked 2021-Mar-17 at 18:26

            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 18:26

            For 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.

            Source https://stackoverflow.com/questions/66677750

            QUESTION

            Website server redirects me but get 200 as status code
            Asked 2021-Feb-11 at 11:16

            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.

            1. https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/1
            2. https://vandal.elespanol.com/juegos/13/pc/letra/a/inicio/2
            3. 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.

            Here's the picture.

            And here's the code:

            ...

            ANSWER

            Answered 2021-Feb-11 at 10:11

            I 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:

            Source https://stackoverflow.com/questions/66151625

            QUESTION

            Why does my Python code act like I'm answering yes to a question when I'm answering no?
            Asked 2020-Nov-13 at 19:23

            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 19:23

            QUESTION

            Adding Lookup reference values in Yaml file
            Asked 2020-Sep-01 at 16:54

            Input JSON is

            ...

            ANSWER

            Answered 2020-Sep-01 at 16:54

            Use ++ to concat strings for the Desc field i.e.

            Source https://stackoverflow.com/questions/63689942

            QUESTION

            Why is my sorting algorithm not sorting correctly?
            Asked 2020-Aug-05 at 07:51

            I was given this sorting function in the best answer to a question I posted. It worked on the example data, but does not appear to work on my actual data and I am not sure why.

            My data can be see here: JSON

            It's an object of objects like this:

            ...

            ANSWER

            Answered 2020-Aug-05 at 07:45

            You 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.

            Source https://stackoverflow.com/questions/63260287

            QUESTION

            interpreting strange output from keras.predict
            Asked 2020-May-25 at 15:05

            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 15:05

            The 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.

            Source https://stackoverflow.com/questions/62004910

            QUESTION

            Series divided by scalar results in NaN/0
            Asked 2020-Feb-16 at 10:56

            I have a series grouped on districts -> crime types -> count of crimes:

            ...

            ANSWER

            Answered 2020-Feb-16 at 10:56

            I believe you need Series.sum per first level PdDistrict - for sum values per first level of MultiIndex:

            Source https://stackoverflow.com/questions/60247587

            QUESTION

            Camunda: How to get DMN to emit two variable/values to context of BPM workflow?
            Asked 2020-Jan-26 at 16:04

            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?

            DMN

            Error

            Stacktrace:

            ...

            ANSWER

            Answered 2020-Jan-20 at 16:01

            The 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

            Source https://stackoverflow.com/questions/59806146

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install vandal

            You can download it from GitHub.
            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.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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