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Decentralized File Storage Module
Introduction
Decentralized file storage on a blockchain allows for secure and immutable data storage, ensuring data integrity and availability. In this tutorial, we will create a blockchain module for storing and retrieving files using the Ignite CLI and Cosmos SDK.
Prerequisites
Steps to Build the Module
Step 1: Scaffold a New Blockchain
First, create a new blockchain project using Ignite CLI:
Step 2: Scaffold the File Storage Module
Generate the file storage module:
Step 3: Define Data Structures
Define the necessary types for file storage. For instance, a File type:
Here,
contentHash
will be a unique identifier for the file, and data will be the file content.Step 4: Implement File Upload Functionality
In your
x/filestorage/keeper/msg_server_upload_file.go
file, implement the logic to handle file upload transactions:Step 5: Implement File Retrieval Functionality
Define a query to retrieve files by their content hash in
x/filestorage/keeper/grpc_query_file.go
:Step 6: Add CLI and gRPC Configurations
Ensure your module's CLI commands and gRPC endpoints are properly configured for file upload and retrieval.
Step 7: Test the Module
After implementing the module, test uploading and retrieving files using CLI commands or gRPC clients.
Conclusion
By completing this tutorial, you've built a basic decentralized file storage module. This module can be further expanded to include features like file encryption, access control, and larger data storage mechanisms.
Next Steps