multihash | Self describing hashes - for future proofing | Hashing library

by multiformats Shell Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | multihash Summary

multihash is a Shell library typically used in Security, Hashing applications. multihash has no bugs, it has a Permissive License and it has medium support. However multihash has 1 vulnerabilities. You can download it from GitHub.

Multihash is a protocol for differentiating outputs from various well-established cryptographic hash functions, addressing size + encoding considerations. It is useful to write applications that future-proof their use of hashes, and allow multiple hash functions to coexist. See jbenet/random-ideas#1 for a longer discussion.

Support

Quality

Security

License

Reuse

Support

multihash has a medium active ecosystem.

It has 815 star(s) with 115 fork(s). There are 60 watchers for this library.

It had no major release in the last 6 months.

There are 30 open issues and 52 have been closed. On average issues are closed in 189 days. There are 8 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of multihash is current.

Quality

multihash has 0 bugs and 0 code smells.

Security

multihash has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).

multihash code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

multihash is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

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

Installation instructions are not available. Examples and code snippets are available.

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multihash Key Features

No Key Features are available at this moment for multihash.

multihash Examples and Code Snippets

No Code Snippets are available at this moment for multihash.

Community Discussions

Trending Discussions on multihash

Package built by Poetry is missing runtime dependencies

Get values from Data-Driven key in dict

What is multicodec and how it is related to multihash?

Node-less way to generate a CID that matches IPFS-Desktop CID

QUESTION

Package built by Poetry is missing runtime dependencies

Asked 2021-Nov-04 at 02:15

I've been working on a project which so far has just involved building some cloud infrastructure, and now I'm trying to add a CLI to simplify running some AWS Lambdas. Unfortunately both the sdist and wheel packages built using poetry build don't seem to include the dependencies, so I have to manually pip install all of them to run the command. Basically I

run poetry build in the project,
cd "$(mktemp --directory)",
python -m venv .venv,
. .venv/bin/activate,
pip install /path/to/result/of/poetry/build/above, and then
run the new .venv/bin/ executable.

At this point the executable fails, because pip did not install any of the package dependencies. If I pip show PACKAGE the Requires line is empty.

The Poetry manual doesn't seem to specify how to link dependencies to the built package, so what do I have to do instead?

I am using some optional dependencies, could that be interfering with the build process? To be clear, even non-optional dependencies do not show up in the package dependencies.

pyproject.toml:

...

ANSWER

Answered 2021-Nov-04 at 02:15

This appears to be a bug in Poetry. Or at least it's not clear from the documentation what the expected behavior would be in a case such as yours.

In your pyproject.toml, you specify two dependencies as required in this section:

Source https://stackoverflow.com/questions/69763090

QUESTION

Get values from Data-Driven key in dict

Asked 2021-Oct-28 at 06:55

I have a dict like below with hundreds of "assets". I would like to get the key="href" and print the url but because all "assets" are in a list and the first key of "assets" is changing I havent found a way to get there. Thanks for helping!

...

ANSWER

Answered 2021-Oct-28 at 00:58

If the dictionary in your example is assigned to a variable called d, this works:

Source https://stackoverflow.com/questions/69745442

QUESTION

What is multicodec and how it is related to multihash?

Asked 2021-Apr-09 at 15:23

I don't have any background with this subject.

To try to understand them better, I read:

Multihash

CIDv1: Multicodec prefix

From what I understand, the multihash is the algorithm used to hash (one way) the value. so it means, we can't go back (we can't decode the hash to the value).

Questions

I don't understand, in simple words, what is multicodec and if it's related to decoding the hash to a value (which makes no sense).
what is the motivation to multicodec prefix?

...

ANSWER

Answered 2021-Apr-09 at 15:23

The multicodec is related to decoding the value the hash points to, if that makes it easier to understand. Don't worry, no magic hash decoding is happening ;). Remember we're making CIDs, and we can use CIDs to lookup content. However then we have the question of "how do we decode this data we just retrieved?", the multicodec solves that problem for us. Reading From Data to Data Structures might help clear up some confusion.
The multicodec prefix allows IPFS to evolve to support new and different encodings for the data that's actually put into IPFS. This refers to IPLD, and you can actually find the answer you're looking for under Links (with information about the codecs under Codecs):

For links we use a CID. A CID is an extension of multihash, in fact a multihash is part of a CID. We simply add a codec to a multihash that tells us what format the data is in (JSON, CBOR, Bitcoin, Ethereum, etc). This way, we can actually link between data in different formats and any link to data anyone ever gives us can be decoded so that it can become more than just a series of bytes.

CID is a standard that anyone can implement, even people that have no other interest in IPLD beyond the need for hash links to different data types can use it.

Source https://stackoverflow.com/questions/67020732

QUESTION

Node-less way to generate a CID that matches IPFS-Desktop CID

Asked 2020-Feb-05 at 20:08

I'd like to generate a CID (Content identifier) for a file in javascript without having access to an IPFS node or the internet. I've tried using js-multihashing-async to first hash the file and js-cid to generate a CID from the hash but I get a different CID than if I just add the file to ipfs-desktop. It looks like the problem is an IPFS node chunks data and the CID is for the DAG that links the files' chunks. I've tried this library but it doesn't produce the same CID as ipfs-desktop does for the same file. This question is essentially the same as mine but none of the answers give a CID that matches the ipfs-desktop-generated CID.

...

ANSWER

Answered 2020-Feb-04 at 15:27

ipfs-only-hash is the right module to use to create an IPFS CID from a file or a Buffer, without needing to start an IPFS daemon. For the same input file and the same options, it should produce the same CID.

This example is from the ipfs-only-hash tests, where it verifies that it hashes the same buffer to the same CID as a js-ipfs node does.

Source https://stackoverflow.com/questions/60046604

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

Vulnerabilities

No vulnerabilities reported

Install multihash

You can download it from GitHub.

Support

Contributions welcome. Please check out the issues. Check out our contributing document for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS Code of Conduct. Small note: If editing the README, please conform to the standard-readme specification.

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