libp2p | Libraries and utilities

 by   eXtremal-ik7 C++ Version: Current License: No License

kandi X-RAY | libp2p Summary

kandi X-RAY | libp2p Summary

libp2p is a C++ library typically used in Networking applications. libp2p has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Libraries and utilities for distributed (peer-to-peer) applications.
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            kandi-support Support

              libp2p has a low active ecosystem.
              It has 6 star(s) with 2 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 2 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of libp2p is current.

            kandi-Quality Quality

              libp2p has no bugs reported.

            kandi-Security Security

              libp2p has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              libp2p does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              libp2p releases are not available. You will need to build from source code and install.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of libp2p
            Get all kandi verified functions for this library.

            libp2p Key Features

            No Key Features are available at this moment for libp2p.

            libp2p Examples and Code Snippets

            No Code Snippets are available at this moment for libp2p.

            Community Discussions

            QUESTION

            Substrate 3.0 "on_runtime_upgrade" function does not work
            Asked 2021-Apr-13 at 11:38

            I want to try "Runtime Upgrade" and "Storage Migration". I tried by steps as following,but "on_runtime_upgrade" function did not work. Unable to verify that the "on_runtime_upgrade" function is called. The implemented debug log is not output.

            1. Download "substrate-node-template 3.0".
            2. Compile it.
            3. I ran the node with the following command. "target/release/node-template --dev -l runtime = debug".
            4. Implement "on_runtime_upgrade" in "palet-template".The program I tried "substrate-node-template/pallets/template/lib.rs" is listed below.
            5. Compile it by "cargo build --release -p node-template-runtime" command.
            6. Upload "node_template_runtime.compact.wasm" by using "sudo" & "setcode" command.
            7. I checked the execution log of the node, but I couldn't check the log set to "on_runtime_upgrade".

            --lib.rs--

            ...

            ANSWER

            Answered 2021-Apr-13 at 11:38

            This Code works. But "debug::info!" does not work. The value of "Something" would be "32".

            Source https://stackoverflow.com/questions/66912571

            QUESTION

            configuration to discover peers using mdns
            Asked 2020-Oct-18 at 10:57

            I am trying to make this example work. It is supposed to create two nodes with mdns support. Mdns is supposed to announce the peer every second, each peer is setup to print a statement once a peer is found.

            When running it, the console output is merely empty. It prints out some garbage error in my concern: (node:51841) ExperimentalWarning: Readable[Symbol.asyncIterator] is an experimental feature. This feature could change at any time

            How do i enable debugging log so that i can try to understand what is going on under the hood ? I would like to verify the mdns announce packets are issued, and possibly received, or not.

            Alternatively, i am trying to use the bootstrap module to begin over wan peers, though expect it to be much slower, thus i would prefer to use mdns.

            I tried to add various configuration and modules without much success, it is not clear to me if i am required to use the gossip module if i only want to announce some data on the dht. stuff like that.

            any help is appreciated.

            ...

            ANSWER

            Answered 2020-Oct-18 at 10:57
            1. Logging

            To enable debugging, configure the DEBUG environment variable. Start with DEBUG=*, it prints log lines like:

            Source https://stackoverflow.com/questions/64405895

            QUESTION

            Electron handle crashes gracefully
            Asked 2020-Sep-18 at 07:26

            I'm trying to implement libp2p inside an electron application, which (obviously) has node support turned on.

            I tried catching errors with the following code:

            ...

            ANSWER

            Answered 2020-Sep-18 at 07:26

            As it turns out, the error was handled correctly, however the event was connected to a form, which by default refreshes the page if submitted. I had to cancel the default event by:

            Source https://stackoverflow.com/questions/63950822

            QUESTION

            How to get IP address of WebRTC peer in IPFS / libp2p?
            Asked 2020-Sep-02 at 17:30

            I'm using this code to play around with IPFS in the browser. I'm wondering how I can access the ip addresses of the webRTC peers? or even know if the peers are actually webRTC, or http peers?

            ...

            ANSWER

            Answered 2020-Sep-02 at 17:22

            Looking at your config, it seems that you did not configure any swarm address. A swarm address must be configured for your peer to be diable from other peers in the network.

            Some context, in this specific case, you are dealing with a browser environment. Currently, Browsers do not allow listening for connections. One of the limitations is actually that a browser does not provide an "IP Address" that someone can use to reach to it. They are designed in a client-server model where the server IP Address is known and the client will establish the connection with it.

            As one of the ways to solve the issue above, there is libp2p-webrtc-star transport. It basically uses a server that will be responsible for listening for connections on behalf of browser nodes. You can use one of the available servers for experimenting https://github.com/libp2p/js-libp2p-webrtc-star#hosted-rendezvous-server. Basically, you should add to your swarm addresses, a multiaddr such as /dns4/wrtc-star1.par.dwebops.pub/tcp/443/wss/p2p-webrtc-star. Once your node starts, your browser node will establish a connection with the server and the server will inform all the other peers about the peer who joined. These peers can dial your peer via this star server and the multiaddrs will look something like: /dns4/wrtc-star1.par.dwebops.pub/tcp/443/wss/p2p-webrtc-star/p2p/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM.

            With this setup, you should be able to open multiple browsers and peers discover and connect to each other. If you run the ipfs.swarm.peers you should see the addresses of the other nodes peers via the star server.

            I hope this helps you move forward. I also highly recommend you to check the following examples:

            As a complement, there are a few new features being worked on that aim to improve the browser experience in this regard. You can follow the developments on: https://github.com/libp2p/js-libp2p/issues/703

            Source https://stackoverflow.com/questions/63710120

            QUESTION

            How to start IPFS in browser by using only DHT WebRTC peers?
            Asked 2020-Sep-02 at 09:57

            I'm using this code in the browser. It seems to be connecting to ipfs.io via http?. I'm looking to only connect to DHT webRTC peers. I'm guessing I need to pass some option to Ipfs.create? I see an example of custom libp2p here but the amount of options are overwhelming. https://github.com/ipfs/js-ipfs/blob/master/examples/custom-libp2p/index.js

            ...

            ANSWER

            Answered 2020-Sep-02 at 09:57

            You can pass the IPFS config options when creating the instance, which enables you to specify the remote WebRTC addresses you want to listen on, and remove/change the Bootstrap nodes to initially connect to. You can see this in the file exchange example at https://github.com/ipfs/js-ipfs/blob/ipfs%400.49.1/examples/browser-exchange-files/public/app.js#L48. So your config might look like this:

            Source https://stackoverflow.com/questions/63696779

            QUESTION

            Getting the peer multiaddr from IPFS Swarm peers
            Asked 2020-Feb-02 at 21:32

            I'm trying to decode the buffer stored in the addr key found in the output returned by the IPFS swarm peers function back to the original string. I tried to use the toString() method with all supported encodings, but the output I'm getting is not correctly decoded.

            ...

            ANSWER

            Answered 2020-Feb-02 at 21:32

            You should not call toString() on raw buffer, but on addr object:

            Source https://stackoverflow.com/questions/59820600

            QUESTION

            How do I know the host is at a server side or client side when the host gest a stream in go-libp2p?
            Asked 2019-Nov-29 at 15:55

            I think the underlying connection of a stream should have a direction, so how do I know the host is at a server side or client side when the host gets a stream in go-libp2p?

            for example, I want to know how I can get the information that the host is at the server side or client side according to the underlying transport connection of a stream in the stream handler function.

            ...

            ANSWER

            Answered 2019-Nov-29 at 15:45

            In go-libp2p every steam has a reference to the tranport connection it belongs to, and the transport connection has a stat attribute. so you can get the information like this below, if the connection's stat is DirInbound, then the host is at the server side, if the connection's stat is DirOutbound, then the host is at the client side.

            Source https://stackoverflow.com/questions/59107112

            QUESTION

            How to shrink the storage size limit of IPFS?
            Asked 2019-Nov-14 at 00:43

            I am using IPFS and trying to understand its structure.

            ISSUE: 1 The issue I am facing is that when I am trying to shrink the storage size of IPFS (for testing it is taking so long time, hence I just want to shrink File System for a while) but is unable to shrink.

            I tried to configure the config file by changing the StorageMax limit using this command

            ipfs config Datastore.StorageMax 1GB

            but still it does not work, it accepting (ipfs add ) the files after the 1GB also, why he is not limiting the file-storage?

            anyone, please suggest me How to reduce file-system size?

            ISSUE: 2 Even in case of IPFS's default storage limit (Which is 10 GB), I saw when I am adding the files on IPFS it is not stopping to store files after crosses 10GB (which was limit). It should not be cross after the limit ends, for this what to do?

            below is the config file

            ...

            ANSWER

            Answered 2019-Nov-14 at 00:43

            It looks like StorageMax does not actually limit the size of the IPFS node, instead it's used to determine whether or not to run garbage collection. IPFS will write until the disk is full.

            Source https://stackoverflow.com/questions/55494711

            QUESTION

            Go Modules "unknown revision" error when using commit hash
            Asked 2019-Aug-08 at 23:36

            I need to pull this commit into my go project.

            I've tried multiple versions of go.mod:

            ...

            ANSWER

            Answered 2019-Aug-08 at 23:36

            For your most recent hash aca080dccfc2, was that merged to master, or what does that hash correspond to? From quick look, aca080dccfc2 does not appear to be on master, but I'm not sure what your expectations are regarding that commit.

            There are restrictions on what hashes are allowed with modules, for example from this slightly older comment in #27043:

            It is present in Git if you look at refs/pulls/nnnnn or whatever the ref is, but not in the main branches and tags. Recent changes cut the search down to main branches and tags, which is more appropriate.

            Trying to get that aca080dccfc2 hash does not work for me:

            Source https://stackoverflow.com/questions/57418578

            QUESTION

            How to send data to multiple hosts using golang libp2p streams?
            Asked 2019-Jul-31 at 12:40

            my question refers to the libp2p library in golang: https://github.com/libp2p/go-libp2p

            This video explains the background: https://www.youtube.com/watch?v=hP0hSZ7E7_Y

            The peers in the network communicate via buffered streams rw. For each new connecting peer there is a new stream created that connects him to an existing peer using addresses. This means there are multiple streams but not all peers are directly connected with each other. Using those streams, the peers can read and write data from it via

            rw := bufio.NewReadWriter(bufio.NewReader(stream),bufio.NewWriter(stream))

            by writing messages `rw.WriteString("message"),rw.Flush()``

            and reading this messages via message := rw.ReadString(rw).

            As the peers are not all connected, they only receive messages from directly connected peers and not even all of them if there are multiple connections.

            Exactly this problem is mentioned in the video, around time 09:45. The author of the video says that this could be easily modified to send messages not only to directly connected peers but also to multiple hosts. But how can this be done?

            My goal is to send message from one peer and that all other peers in the network, also the not directly connected ones, can receive (and answer) it.

            ...

            ANSWER

            Answered 2019-Jul-31 at 12:40

            The best way to send multicast or broadcast messages in libp2p is to use PubSub, So every node subscribed to a topic will be notified about sent messages despite not being directly connected to sender node.

            You can find an example implementation using Pubsub here. It uses gossibSub implementation from libp2p.

            Source https://stackoverflow.com/questions/55614393

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