With the rise of Web3 and decentralized technologies, the issue of data storage has become particularly relevant. Traditional centralized servers do not always provide the reliability, confidentiality, and censorship resistance required by the new Internet paradigm. One of the key solutions in this area is IPFS (InterPlanetary File System).
In this article, we will look at what IPFS is, how it works, and how it is used to store and transfer data in decentralized applications (dApps).
What is IPFS?
IPFS is a protocol and a peer-to-peer distributed file system designed for storing and sharing data in a decentralized network. The project was developed by Protocol Labs and is open to everyone.
IPFS allows you to:
- Store files in a decentralized and secure manner.
- Ensure fast access to data from any network node.
- Eliminate dependence on centralized hosting and clouds.
- Increase resistance to censorship and failures.
How IPFS works
The main idea behind IPFS is content addressing, not location addressing. In the traditional internet, we access data by URL (e.g., example.com/file.jpg). In IPFS, data is identified by a unique hash depending on the file content.
Key features:
- Content addressing: each file is divided into blocks, and each block receives its own hash.
- CID (Content Identifier): a unique identifier for the content. If the file changes, the CID also changes.
- P2P network: data is uploaded and distributed across a peer-to-peer network. Any node can store and distribute content.
- Versioning and immutability: each CID represents a version of the file at the time of upload.
Why is IPFS important for Web3?
Most blockchains are not designed to store large amounts of data. Storing images, videos, or even JSON files directly in smart contracts is expensive and inefficient.
IPFS solves this problem:
- Files (e.g., metadata and images for NFTs) are stored in IPFS.
- Only the hash (CID) referring to specific content is recorded in the blockchain.
- This scheme combines the fast access and security of blockchain with scalable storage.
Using IPFS in dApp development
A typical use case:
- A user uploads a file via a dApp.
- The file is sent to IPFS, broken down into blocks, and a CID is generated.
- The CID is recorded in the blockchain — in a smart contract or transaction.
- Anyone can then retrieve this file using the CID and any IPFS gateway.
Popular tools for working with IPFS:
- js-ipfs / go-ipfs — client libraries.
- Web3.Storage, NFT.Storage, Pinata, Infura IPFS — services that simplify interaction with IPFS.
- Fleek, Filebase, Storj — platforms for hosting and pinning data.
IPFS issues and challenges
Despite its obvious advantages, IPFS is not yet perfect:
- Pinning: files are not stored indefinitely by default — they need to be “pinned,” otherwise they may disappear from the network.
- Delivery delays: access to data may be slower than with CDN or centralized hosting.
- Lack of built-in encryption: additional security measures must be implemented at the application level.
- Integration complexity for beginners: requires basic knowledge of P2P and decentralization.
Example: IPFS and NFT
Each NFT (for example, an image in Ethereum) consists of:
- Metadata (JSON file): name, description, link to the image.
- File (image, audio, etc.): the media file itself.
Both of these elements are most often uploaded to IPFS. The resulting CIDs are stored in the NFT contract (e.g., ERC-721 standard), which makes the token truly decentralized.
Conclusion
IPFS is not just a file storage system, but the foundation of Web3 infrastructure. It allows decentralized applications to ensure stability, reliability, and control over data.
For developers creating dApps, NFTs, or DAOs, understanding IPFS is an important step towards building truly decentralized solutions.
