Hi! I have been searching forever but somehow I am never really getting where I want to be. I simply want to use the contents of a file + filename to calculate the CID but with plain code and not with any other library. None of the IPFS CLI commands seem to be able to give me sets of data that I c…

This is a common question that comes up a lot on this forum. Use the search to find the other discussions. I think someone did post a working solution perhaps, but it assumes a specific chunking algo, and other parameters. There’s no one-to-one mapping of data files to CIDs which has confused lots a…

Yeah I figured it wasn’t that easy, but I am able to control the parameters of the files, so that is no problem really. Also, I am happy to search but so far I came out empty-handed. Maybe just using the wrong keywords, most things related to multihash specifics don’t go further than the generic de…

Here’s some prior discussions I found… [image] How to calculate file/directory hash? Help I’m interested in calculating IPFS hashes for various files and directories, somewhat similar to ipfs add -n. I’ve searched around, but wasn’t able to find any solid documentation on…

Thnx, these were indeed what I found, but they still use the default libs to actually preform the functions. I finally got there though, for a single chunk for now, in Solidity. Thnx!

I think you meant CIDv0, not v2

Yeah i wanted to do this too. but ended up using the ipfs-http-client lib. const { create, urlSource } = require(‘ipfs-http-client’) const file = await ipfs.add(urlSource(http://blah/myfile.blah)) fileCID = file.cid console.log(fileCID)

[image] Sha256 content hashing in solidoty Ecosystem Hi! For those who might find it interesting: I wrote a small smart contract that wraps any content from a single chunk into a ipfs-style hash. It also supports hashing folders with different files. I wrote this becau…

Manually calculate the IPFS CID v2

Help

wclayf July 5, 2021, 9:16pm 4

Here’s some prior discussions I found…

Topic		Replies	Views
Receive a file with an known SHA256 sum from IPFS Help	14	2244	January 21, 2023
Sha256 content hashing in solidoty Ecosystem and Usage	0	622	July 19, 2021
Is there an API method to get the IPFS hash of a file? Help	8	1343	May 17, 2023
How to calculate Cid locally? Help	18	3696	March 19, 2024
IPFS and Solidity contract Help	8	855	July 1, 2021

Manually calculate the IPFS CID v2

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