Data storage proxy SC (TON)

Features

Stored in TON BC

All data is securely stored in TON blockchain which provides outstanding redundancy, decentralization, SC and data access options.

Security options

Data access can be configured granularly with different access options, writing can be protected or restricted in many different ways.

Usage flexibility

Stored data can be freely accessed by any user (if permitted) or by any smart contract in different ways with help of internal messages.

Data is stored into separate boxes with many features for each one:
Box ownership control: each box can have its own owner
An owner can be a person (wallet) or some complex smart contract
Complex smart contract can programmatically change box contents
Box can even be protected from contract owner, if neccessary
If box is not protected contract owner can manipulate it too
Programmatic access control with different options
Data can be accessed manually with a free getter method by some client
Inside the blockchain data can be returned as a response to specific message
Last, but not least, data can be injected into a proxied (forwarded) message
Each of those options can be allowed or forbidden per each specific box
It is possible to willingly protect the box from contract owner
This provides some safety guarantees and autonomy for the box owner
Contract owner would not be able to impair box options or alter contents
It is possible to forcefully unlock the box if its owner disappears for long time
Box can be frozen to prevent any accidental modification
It is not possible to do absolutely anything with box when it is frozen
The only allowed operation is explicitly thawing the box
This action is similar to chattr +i in linux world.
Box can have some quota restrictions (cells and bits)
This prevents box users from inadequately using contract resources
When box is protected decreasing limits is not possible
The limit affects any future changes but not current data of the box
Good code base and extensibility
The code is well written and can be easily read and extended
Extending the code can provide more features, for example
Adding a dnsresolve function will turn this into hybrid DNS resolver

Applications (some examples)

Infrastructural storage

The contract can be used as a secure centralized storage of data, which can be provided by a user or a smart contract and can safely used by other contracts in the blockchain.

Templating service

The contract can proxy (forward) a message and inject data into it at specified place, that allows possibility for customized interaction with any blockchain services.

Data server

Important pieces of data can be relaibly stored in the blockchain and can be accessed free of charge by any user (for example, hash tables, PKI trees or domain lists).

Hybrid DNS resolver

By extending the contract with a little DNS resolving function it is possible to use the contract as a hybrid DNS service with per-domain owners and manual controlling.

More information

Contract

Quick start guide on how to use the contract can be found here. You can read some technical details about the contract on the dedicated page. The code is published in this GitHub repository.

Author

You can find author on GitHub (Skydev0h) or contact on Telegram by handle @Skydev.

CT SC

Please have a look at another smart contract made by the author for this contest: Conditional transfer smart contract, a decentralized financial SC.

/------------------------------------------------------------------------\
| Created for: Telegram (Open Network) Blockchain Contest #2 (Part #2)   |
| Author: @Skydev (Telegram) / Skydev0h (GitHub)                         |
>------------------------------------------------------------------------<
| March 2020, second half                                                |
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