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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Storing ERC721 metadata on IPFS

I wanted to store the metadata of my ERC721 tokens on IPFS. Currently, I am inheriting from OpenZeppelin ERC721.sol contract, and I saw there is a tokenURI function which returns the URI of the ...
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How uploaded form in golang store files in ipfs?

I have uploaded form written in golang and I want that when user upload file, it goes to ipfs not save in local directory. I used daemon and go-ipfs-api package to upload directory in ipfs but how ...
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48 views

Can we enter our private key for decrypting a message in the react (frontend) part of a dapp?

We are planning to make a dapp in which we receive the encrypted hash of a file stored on ipfs. We need to decrypt it using our private key stored on the local computer. Is it safe to enter our ...
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Stuck at “ipfs process started” after running embark

I ran the following commands, embark demo cd embark_demo embark run embark info invoked /home/k00lawn/.nvm/versions/node/v10.17.0/lib/node_modules/embark/bin/embark embark info located /home/k00lawn/...
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Storing access to encrypted data in non-fungible tokens

I am fairly new to ethereum, I want to develop a non-fungible token that can grant access to its owner access to encrypted data on IPFS. The way I am thinking this can be done is, first the owner of ...
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19 views

How to get a public IP address with IPFS-JS

With IPFS JS when I run this: const ipfsNode = await IPFS.create(); const addresses = await ipfsNode.swarm.localAddrs(); console.log(addresses); I get this: Swarm listening on /ip4/127.0.0.1/tcp/4002/...
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76 views

ipfs.add is not working

I am trying to upload my file to IPFS and save its hash to my Ethereum contract but neither ipfs.add nor ipfs.files.add is working for me... I have tried usin for loop i.e. for await (const result of ...
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36 views

Does IPFS use HTTP?

How do nodes communicate in the IPFS network? Aren't they still using HTTP? If not, how is JS-IPFS able to interact directly with the IPFS network without the need for a HTTP gateway server?
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I’m trying to build a versioning System using IPLD and IPFS .Is it possible to publish hashes from multiple users to the same IPLD object?

I’m using Ipfs-api from Infura for interaction .I’m able to create and upload files to the Ipld object .I want to store different versions of the same file on the object.These versions can be ...
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21 views

How to deploy my java web app on ipfs?

How to host my java web app onto decentrailsed network like ipfs as my web need a web server like tomcat to run and serve the dynamic content so how can i install tomcat on ipfs and push my war in it ...
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1answer
26 views

What is the difference between IPDB and Blockchain Databases?

I wanted to know what are the differences between IPFS, interplanetary file system and a block chain database like IPDB and BigChainDB
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webpack packing website and upload to ipfs but node_modules not found

After webpacking the website, I upload the dist folder to ipfs. The ethereum part is working fine, however no js files (except for app.js) and node modules can be found. But as you can see in the pics,...
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ipfs with ethereum

Module not found: Can't resolve 'ipfs-api' in 'C:\Users.......\src' I have used this code //using the infura.io node, otherwise ipfs requires you to run a //daemon on your own computer/server. const ...
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How do I redirect my .eth domain with eth.link?

Let's say I want to redirect somewebsite.eth.link to www.otherdomainiown.com. http://spacex.eth.link/ does this and the redirect works on chrome. However, I don't see an A record and I do see IPFS ...
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46 views

Trigger a payable function to send ipfsHash back to sender

I want to make a testnetwork, a supply chain, with 10 manufacturers/addresses. For that I want to make a function that sends the saved ipfsHash, which is the information about the product that will be ...
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58 views

ipfs files ls not showing all the files uploaded to it

When I am using ipfs files ls, it is not showing all the files which are being added. But when I am searching the files in ipfs explorer through the hash I am getting the file.
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1answer
231 views

IPFS add and read file from node

I am currently playing around with IPFS in a docker container. I am able to send HTTP requests to the API using curl. I created a small text file with some text. I would like to add the file with the ...
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IPFS file uploading issue [closed]

I just installed IPFS version 0.4.22 on my Mac. When I try to upload/add a file in TERMINAL - using the following command: ipfs add myLogo.jpg I get this error: Error: ipfs repo needs migration ...
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1answer
329 views

ipfs.infura.io for IPFS gateway and pinning

I'm using Infura API for initializing IPFS. IPFS uses garbage collector to clean 2 weeks old unpinned data in public gateway. So, if I'll pin my hash is it possible that IPFS will still delete my ...
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1answer
50 views

dApp design and security question

I'm designing a dApp where users can submit work they've done (files) to ipfs/swarm. To get credit for the work they then reference the hash of the files when calling a smart contract. What are some ...
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1answer
583 views

Replication of Files across a Private IPFS Network

I want to create a private IPFS Network in which nodes should be able to add data and share the Hash with other nodes in the network so that they will be able to access the files and make them ...
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1answer
265 views

Upload a full directory to IPFS using ipfs (js-ipfs-http-client)

I want to upload a directory to ipfs on my browser using (js-ipfs-http-client) module. I found this old issue. https://github.com/ipfs/js-ipfs/issues/277 So I decided to use recursive way to add files ...
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1answer
39 views

Does it align with the base concept of blockchain, if one stores the hash value generated from IPFS network in a database?

A friend of mine utilized IPFS to store data files regarding some user info.But for an android application of the same, he retrieved all hash values(same user but different files) and stored it in a ...
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1answer
158 views

Implementing a state channel

I am trying to build a platform to play TicTacToe using DApps. The players invite others by placing a stake and then opponents accept it. The first turn is recorded on chain by calling a function in ...
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1answer
84 views

company using IPFS in their application

I am learning IPFS these days and curious about if any company is using IPFS to save data. When we upload file into IPFS, we get a hash and can use the hash to get access to the file content. But in ...
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78 views

is it possible to use IPFS Hash to ensure file integrity?

My question is if i can use the IPFS Reference/Hash to ensure file integrity. In other words if i have a file can i use a specific Hashfunction to ensure that the generated Hash of that file is equal ...
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130 views

How to use the ipfs.get()?

I am new to IPFS. I added a file in IPFS and then, pinned it. Now, I am trying to retrieve the file. I am writing the code in React. Hence I used the following code: ipfs.get('/ipfs/...
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1answer
125 views

What's the difference between ipfs.infura.io vs ipfs.io

When saving ipfs hash, i find that ipfs.infura.io is x10 faster than ipfs.io. If the public gateway (ipfs.io) has a negative impact on user experience due to its slowness, why people would use that ...
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2answers
36 views

Does it align to the base concept of blockchain, if one stores the hash value generated from IPFS network in a database?

A friend of mine utilized IPFS to store data files regarding some user info.But for an android application of the same, he retrieved all hash values(same user but different files) and stored it in a ...
2
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1answer
105 views

Error while importing Libp2p package in blockchain

I have installed some js-libp2p's packages on my Ethereum Blockchain-ipfs project and I wrote some codes like below. const TCP = require('libp2p-tcp'); const MulticastDNS = require('libp2p-mdns'); ...
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1answer
64 views

Asymmetric encryption with master Key

Is there any way i can derive private and public keypairs from a Master Key? The Master Key should be able to decrypt every encryption made with the generated Keypairs. to explain a bit further i ...
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0answers
49 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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142 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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2answers
351 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 ...
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1answer
54 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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1answer
61 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 ...
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2answers
1k 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">&...
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118 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 ...
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1answer
143 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 ...
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1answer
290 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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1answer
138 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', { ...
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1answer
114 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....
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89 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 ...
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1answer
845 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 ...
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2answers
375 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 ...
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0answers
132 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 ...
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162 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?
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1answer
109 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. ...
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1answer
142 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 ...
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2answers
2k 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 ...