nimbus | Upgradeable consensus framework for Substrate blockchains and parachains | Blockchain library
kandi X-RAY | nimbus Summary
kandi X-RAY | nimbus Summary
If you want to start using Nimbus in your project, it is worth reading this. At its core nimbus is a consensus engine that considers blocks valid if and only if they inject the author's public identity into the runtime, and seal the block with a signature by the author's private key. Compared to most consensus engines, this is very permissive -- anyone who can create a signature can author valid blocks. In order to build more useful and familiar consensus engine on this foundation, nimbus provides a framework for creating filters to further restrict the set of eligible authors. These filters live inside the runtime. Being general in the consensus layer and deferring most checks to the runtime is the key to nimbus's re-usability as a framework. And is the reason that writing a consensus engine is as easy as writing a pallet when you use nimbus.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of nimbus
nimbus Key Features
nimbus Examples and Code Snippets
Lines of Code : 15License : Strong Copyleft (GPL-3.0)
Copy# Install polkadot launch (I used v1.4.1)
npm i -g polkadot-launch
# Build polkadot (I used 82aa404c; check Cargo.lock to be sure)
cd polkadot
cargo build --release
cd ..
# Build Polkadot-parachains example collator
cd cumulus
git checkout nimbus
c cumulus_pallet_parachain_system::register_validate_block!(Runtime, Executive);
Community Discussions
Trending Discussions on nimbus
QUESTION
I am trying to figure out whether i should pick(based on the adoption):
-nimbus-jose-jwt - Used By 279 artifacts OR
-jose4j - Used by 655 artifacts
I found that jose4j 's author, Brian Campbell, is active, based on the commits, it has the features that i need i.e support for JWE and it works well, but what i don't like is this:
So, are developers picking jose4j, is it a good choice(am i being paranoid?) or should i move to nimbus(the Used By artifacts is more for nimbus, does it mean it s more widely adopted?)
...ANSWER
Answered 2022-Mar-18 at 13:36Looks like that vulnerability is in Logback, which is a dependency that's only used in the unit tests (further down that page you screenshotted shows the different dependency categorizations).
I need get that updated, obviously, but it doesn't impact the library itslef.
QUESTION
I implemented a rest authorization server that returns the public-key for a given keyId in the JWK format using the com.nimbusds:nimbus-jose-jwt:9.13 package. The code looks something like this:
ANSWER
Answered 2021-Sep-01 at 16:35The answer is to use String for (de)serialization for those facing this problem. Why, you ask? According to the RFC, JWK is a string in the JSON format. While nimbusds:nimbus-jose-jwt defines a JWK object, any APIs that return valid JWK (or JWKSet) can assume that it's a string.
I also raised this issue with the developers of this package, and they recommended using String or Map for (de)serialization.
QUESTION
I am a novice with Java, and my class has been given an assignment:
Design a client/server application in which a client communicates directly with a server. The server will store product and customer information in two separate files. The client application will allow a user to request product and customer information from the server. The server will retrieve and send the requested information to the client. The information will be displayed by the client in a user-friendly manner. It is suggested that your application use Swing components to support a user-friendly interface.
I haven't built a client-server application before. I followed a youtube video tutorial (https://www.youtube.com/watch?v=vCDrGJWqR8w) to build the client-server application itself, but I'm not sure how to implement sending the information from the text files from the server to the client. I'm having trouble finding an answer online, I don't know if I'm just not asking it the right way or what.
I thought I could add if statements in the server file, so when the client side enters the corresponding word, it will run the code to send that specific file's text to the client.
If anyone could direct me to how I can accomplish this, I would greatly appreciate it. My Instructor has not responded to me, and our tutoring service is down for maintenance this weekend.
Edit: I found a tutorial on how to create the GUI (https://www.youtube.com/watch?v=h3i459_arng). I decided that it might be easier to write the GUI and then add the file reading capability.
I also found a website on how to read the text from my files (https://www.geeksforgeeks.org/different-ways-reading-text-file-java/)
Right now I can get the text from the files to write to the JTextArea in the Server chat window, but I need it to be sent to the JTextArea in the Client chat window. How do I do that?
ChatClient.java code
...ANSWER
Answered 2022-Mar-07 at 04:12just in case anyone was wondering, I figured this out. I had gotten the GUI added, and found the code to read from a txt file, but I was stuck because the text from the file was being added to the Server's GUI, and I needed it added to the Client's GUI.
I needed to use my PrintWriter object writer to send the text to my Client.
Here is my updated code:
ChatClient.java file
QUESTION
following this example I wrote some code to validate an access token return by implicit flow from azure.
...ANSWER
Answered 2022-Mar-02 at 13:15You need to expose an API scope in Azure, and get the client to use that. Also ensure that there is no nonce field in the JWT header of the access token. My blog post has further info.
AZURE AD BEHAVIOR
The above behavior is quite specific to Microsoft, and is required when using Azure AD as a provider:
Tokens with a nonce field in the JWT header are designed only for MS APIs, eg Graph, and use an in-house validation mechanism. The intent is for these to always fail validation in custom APIs.
Tokens for your own custom APIs must be retrieved via clients that request custom scopes. Note that the OAuth client configured in Azure AD can be a logical entry, rather than needing to maintain one for each individual API.
I believe the MS behavior is based on OAuth resource indicators, though my personal preference is to use more mainstream techniques of scopes, claims and audience checks when receiving access tokens in APIs.
QUESTION
Facing the below error while trying to deploy an encryption java cloud function on Google cloud. [Note, function works locally].
...ANSWER
Answered 2022-Feb-21 at 07:57Your error is stating that you are attempting to use a class which does not exist. If it works locally and it does not work on Google Cloud, that means the libraries/jar are not configured properly.
If what you are deploying is a Fat/Uber jar, unzip the jar and verify the location of nimbus-jose-jwt.
An uber JAR is a JAR file that contains the function classes as well as all of its dependencies. You can build an uber JAR with both Maven and Gradle
If what you are deploying is a Thin Jar, ensure that your dependencies are in a package relative to the JAR deployed.
A thin JAR is a JAR file that contains only the function classes without the dependencies embedded in the same JAR file. Because the dependencies are still needed for deployment, you need to set things up as follows:
The dependencies must be in a subdirectory relative to the JAR to be deployed. The JAR must have a META-INF/MANIFEST.MF file that includes a Class-Path attribute whose value lists the required dependency paths.
The Google Cloud documentation is very clear on how you can use Maven/Gradle to deploy either.
https://cloud.google.com/functions/docs/concepts/java-deploy#deploy_from_a_jar
QUESTION
I have a grails application written in Groovy. It is built and works when it's launched with :
...ANSWER
Answered 2022-Feb-18 at 12:22I can't believe I wasted two days straight on this because someone wrote the package with an uppercase letter. There was a class in a package :
QUESTION
In my application config i have defined the following properties:
...ANSWER
Answered 2022-Feb-16 at 13:12Acording to this answer: https://stackoverflow.com/a/51236918/16651073 tomcat falls back to default logging if it can resolve the location
Can you try to save the properties without the spaces.
Like this:
logging.file.name=application.logs
QUESTION
I am trying to run a multi line shell in shell_exec
...ANSWER
Answered 2022-Feb-13 at 10:10You're missing a trailing \ backslash on the first line of the command. It should be:
QUESTION
ANSWER
Answered 2022-Jan-27 at 11:29The problem was occurring because the default authentication manager wasn't working for me, I had to implement one specifically for my problem.
QUESTION
Am pressing the Button but it's not working for some reason.
I want to transfer JComboBox info into this JTable.
Here's what the GUI looks like
Please help me fix this issue. I am suspect it's a logic error. I just want the contents in the dropbox to be transferred to the 2nd table (Which is basically empty)
Here's the code:
...ANSWER
Answered 2021-Dec-27 at 02:28You're not learning Swing by using a GUI builder. Oracle has a helpful tutorial, Creating a GUI With Swing. Skip the Netbeans section.
You have a dropbox and a table with a list of pavilions. Why do you need both? You either have a dropbox or a table with a list of pavilions. A table with a list of pavilions usually has buttons between the two tables to move items in both directions. It appears that what you want are called bi-directional selection lists.
Also, you have two different lists of pavilions. Fiji has an extra space in the table list and the UK pavilion has pavillion uncapitalized.
Here's the GUI after selecting three pavilions.
Modify these methods.
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Vulnerabilities
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Install nimbus
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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