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Questions tagged [ipfs]

IPFS (the InterPlanetary File System) is a new hypermedia distribution protocol, addressed by content and identities. IPFS enables the creation of completely distributed applications. It aims to make the web faster, safer, and more open.

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17 views

Base58 javascript implementation [closed]

I am using IPFS-multihash method to store IPFS hash in smart contracts. For that I need to decode base58 format: QmaozNR7DZHQK1ZcU9p7QdrshMvXqWK6gpu5rmrkPdT3L4 to binary(as hex): ...
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0answers
40 views

Unhandled Rejection (Error): No valid “from” address specified in neither the given options, nor the default options

Unhandled Rejection (Error): No valid "from" address specified in neither the given options, nor the default options. ▶ 4 stack frames were collapsed. (anonymous function) C:/mydapp1/client/src/App.js:...
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0answers
21 views

IPFS - file stored by all users

Suppose one or many users used my fully decentralized app to store different files on IPFS. How can I keep track of all file hashes by using smart contracts?
4
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2answers
92 views

How to encrypt a file with multiple public address?

Can I encrypt a file with multiple public address such that each of them can decrypt the file using their private keys? Thus achieving a system to securely store file on IPFS which can be accessed by ...
-1
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1answer
26 views

Fully Decentralized Dapp [duplicate]

How can I build a fully decentralized dapp where the frontend code (.html,.css,.js) and ABI files (build/contracts/json) are stored in ipfs and contracts on test-network. But I am unable to do so ...
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0answers
25 views

NuCypher for storing file securely on IPFS

Please someone guide me how I can use NuCypher Algo for storing a file on IPFS such that only a set of people can open its ipfs-hash link. Can you tell the implementation because I am finding it ...
0
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1answer
35 views

Costs/efficiency of locating stored data on Ethereum

Based on the answer to this question, storing IPFS hashes on Ethereum could be done in 3 ways: Store it as a string Store it as a struct Store it in event log Ordered from most expensive to least ...
1
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2answers
149 views

Uploading files on IPFS Infura

I am trying to make a dapp to upload files on IPFS Infura. I am using IpfsHttpClient in web browser by including the script <script src="https://unpkg.com/ipfs-http-client/dist/index.min.js">&...
0
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1answer
19 views

Ethereum & IPFS Storage Question

Etherum vs IPFS for Long Terms Storage of Critical document files? Storing high priority files on the blockchain. I am also writing a smart contract for the files on Etherum. I have concerns about ...
0
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0answers
44 views

IPFS dapp hosting

I have uploaded the dapp frontend folder along with contracts json files on the IPFS using ipfs add <path> ipfs name publish <hash> commands. I am running Ganache for in-memory virtual ...
0
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0answers
11 views

IPFS dynamic content

Can my users store dynamic content on IPFS and how that will reflect on my dapp, what will happend when everytime user can update the state of the app. How this will reflect it? Imagine something like ...
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0answers
50 views

IPFS image download with HTML

I have searched quite a lot now about how I can download a photo stored with IPFS having the hash in HTML. I have tried using the hash and <a href={`https://ipfs.io/ipfs/hashKey`} download="...
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0answers
92 views

ipfs.files.add(Buffer) function causing TypeError: Cannot read property 'add' of undefined

I am trying to upload an image to ipfs using ipfs.files.add() function but it is causing me this error Uncaught TypeError: Cannot read property 'add' of undefined at App.onSubmit (App.js:70) at ...
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0answers
5 views

showing unknown command “API.HTTP”

For configuring CORS in IPFS config i executed command ipfs config --json API.HTTP Headers.Access-Control-Allow-Methods "[\"PUT\", \"POST\", \"GET\"]" but it giving error unknown command "API.HTTP". ...
0
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1answer
57 views

getting error while generating key after uploading file into IPFS infura

I'm getting an error while generating key after uploading file into IPFS infura. Sample code given below var ipfsAPI = require('ipfs-http-client'); const ipfs = ipfsAPI('ipfs.infura.io', '5001', { ...
0
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1answer
45 views

Resource files are not not publishing in ipfs name publish

I made sample dapp application for interacting with smart contract and i developed a basic ui when i am publishing it to ipfs like i did seeing a tutorial and ipfs documentation, i can get only index....
0
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0answers
55 views

Migrating or representing a Microsoft SQL Database on the Chain

I am wondering what is the best way to migrate or represent a massive, 50 table, Medical Health Records SQL Database on the Blockchain. Is it best done with IPFS hash on Ethereum or is Hyperledger a ...
1
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1answer
297 views

how to upload file into ipfs from node js without uploading files into node js server [closed]

I need to upload multiple files into ipfs from node js. Flow: file(html,angularJS) --> node.js --> IPFS --> ipfs hash save into DB. I have sent a file from HTML(angularJS) and I got the ...
1
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1answer
88 views

ipfs daemon error?

bc@bc-HP-Pro-3090-Microtower-PC:~/supply-chain$ ipfs daemon --writable=true Initializing daemon... Adjusting current ulimit to 2048... Successfully raised file descriptor limit to 2048. Swarm ...
2
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0answers
57 views

error when trying to upload picture from ipfs

$("#image").change(function(event) { const file = event.target.files[0] reader = new window.FileReader() reader.readAsArrayBuffer(file) }); function saveOnIpfs(reader) { return new ...
3
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0answers
59 views

Who hosts IPFS?

I'm trying to get my head wrapped around how IPFS actually stores files. There is no IPFS coin, so who is hosting these files and are they getting paid to host them?
0
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1answer
62 views

Key-value immutable storage: on-chain vs IPFS

I'm currently working on a D-App for a client. It's basically a temper-proof immutable storage of 'objects', each object being defined with 8 key-value pairs (strings) and a collection of pictures. ...
0
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1answer
67 views

dApp Tech Stack

So I'm looking into building a dApp with standard app I functionality like user login/posts/likes/comments etc. Along with harnessing the power of ethereum to support betting and donations. Here is ...
1
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1answer
586 views

IPFS gateway not getting my files , Keeps on loading without any errors

After making all the client side scripts inside a folder which are needed for my website (in dist folder) checked with ipfs swarm peers : shows many results then adding the files with ipfs add -r ...
2
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1answer
277 views

IPFS File upload

I am working on an idea of uploading a file on IPFS. But the requirement is, the uploaded file should be available for view only to the intended group of people. The code to upload the file is in JS. ...
1
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1answer
201 views

Dapp User Account Storage and IPFS/infura

I'd like to build a dapp utilizing the power of the Ethereum blockchain and IPFS. Right now, my plan is to have users sign up to use the app and store their account data + files on IPFS through a ...
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1answer
45 views

Inspecting IPFS files

Is it possible to store / catalogue every file which is being published over IPFS ? Is only encryption the viable way to securely publish files over the internet ?
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0answers
72 views

Image and file storage in block chain

Is it possible to store a base64 image code as string in block chain? I know we can use IPFS or Swarm as a tool to store an image or a document, but if someone gets to know about the hash anyone can ...
0
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2answers
113 views

Creating a simple DApp [closed]

I want to implement the "Decentrilized Gallery", and implement it to the blockchain(ethereum) and it's kinda will work like: Basic html page with a button in the middle to choose a picture from ...
0
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1answer
182 views

IPFS versioning - How to get all files from the IPFS key?

Based on the below code, im able to add a file**(dataobj.txt --QmUUHKjR5ZdrrYmxpXyPrYP3eMyhv9FnRKo1Duv9stzmmw)** and publish a file and then assign to the key "myIPFSKey". Step 1: ipfs add -r ipfs/...
1
vote
1answer
108 views

IPFS Versioning for dynamic content

is it possible to keep versioning in IPFS? Like im saving one row of record like pid:1, mid:3, status: started --> v1 pid:1, mid:3 status;completed --> v1.1 is there any way to implement ...
1
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1answer
201 views

How to point a domain registered with ENS to IPFS content?

After securing a .eth domain, how do you point the domain to resolve to an IPFS hash?
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0answers
59 views

How to Connect IPFS client in xamarin forms.?

i need to start ipfs client in My xamarin forms app.Now with the emulator it is working but when it comes to device i don't know how to connect.?I want to connection for both platform(ios and android)....
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0answers
35 views

IPFS Protocol upgrade or migrations

How would I migrate from IPFS, let says that I got 10M files linked by IPFS, and I want to migrate all of them to Swarm, how would I do that? The question in a different way: I want to use a new ...
1
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0answers
23 views

Our vendor created the IPFS and Ethereum platform to store the PDF documents. How do i use the same code in Desktop Application

I am a quiet layman in IPFS and Ethereum. Our vendor created the web application which stores the documents IN IPFS (Ethereum). Now, we do need to do the same in the desktop application also. ...
2
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2answers
562 views

How much does it cost to store each IPFS hash in Ethereum blockchain

I've looked in some of the resource on calculating the Gas costs like this spreadsheet I found on this thread. But the spreadsheet only have computations gas costs but not storing of hashing. I'm a ...
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1answer
307 views

I am new to IPFS. Is there any need for checking where the IPFS file originates from for security purposes?

I want to identify the ipfs source node. Is it necessary to do that in IPFS?
3
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1answer
290 views

IPFS. Add a directory recursively with an HTTP api

Is there an HTTP api equivalent of doing: ipfs add -r resources/public where resources/public is a directory with a static website (index.html in the root, css, js etc). Doing: curl -F file=...
1
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1answer
297 views

Does IPFS has limits? [closed]

I need to upload 8Tb data from Ubuntu server to IPFS. Does it possible, I mean does IPFS has limits? Does this data will be online if my server down? Who really host files? Does owners of https://...
2
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2answers
115 views

How do I update data for project using blockchain (Ethereum)?

I am very new to creating blockchain dapps, so some guidance would be appreciated. I am conceptualizing how to approach creating a private blockchain so that users can communicate about the status of ...
3
votes
2answers
643 views

IPFS file download

I wanted to check that is there any way i can download the IPFS file without running the local demon. I am working on a Dapp where i will be uploading the files over IPFS and sending the link of it to ...
1
vote
1answer
179 views

How to encrypt file before storing into IPFS network in Javascript? [closed]

I want to encrypt file before storing into IPFS network so that only person who is uploading a file should be able to decrypt.
1
vote
1answer
289 views

Ipfs.files.add promise throws error [closed]

I'm trying to upload a simple image file to IPFS using ipfs.files.add(). However, I can't seem to figure out why the promise throws an error. Here's the code: $(function() { $(window).load(...
1
vote
1answer
134 views

IPFS Config on windows 10

I'm trying to execute these commands on windows 10 ./ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]' ./ipfs config --json API.HTTPHeaders.Access-Control-Allow-Methods "[\"PUT\",...
0
votes
2answers
209 views

DApp using IPFS Ganache and MetaMask

I am following a tutorial (hosted by dappuniversity) on youtube regarding DApps using IPFS. I have done exactly everything as mentioned in the tutorial but i get this errors: GET https://ipfs.io/ipfs/...
0
votes
1answer
124 views

How can I connect my static page (Dapp) to my ipfs node?

The very naive way I'm going about it is: const node = new Ipfs({ host: "xxx.ip.address.xxx"}); When I save an image from the static page, it does give me an ipfs hash back and save it to the local ...
3
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1answer
544 views

How long do my files stay on IPFS when I upload it?

I'm trying to grasp the concept of how IPFS works. Say if I upload 1GB of data to IPFS. How long does it stay there? Or do I have to leave my computer on at all times for the file to be live on the ...
0
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2answers
515 views

Upload file to IPFS from HTML page

I am trying to upload the file to IPFS from HTML page and below is my code but I am getting below error. Uncaught ReferenceError: Buffer is not defined I have imported below statements <script ...
3
votes
3answers
347 views

RE-Encrypt file in IPFS

If I have an encrypted file in IPFS with a symmetric key that I share, can I after that decrypt and re-encrypt that file with a different key in order to revoke access?
0
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1answer
98 views

How to generate thumbnails from IPFS URL?

I am trying to design a dapp which displays files uploaded to IPFS by a user. On my web page, I wish to display thumbnails of all the files uploaded by him. For this, I designed below mentioned EJS ...