0g-storage-node/docs/introduction.md

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2024-03-24 14:37:46 +00:00
# Introduction
## Overview
0G Storage is the storage layer for the ZeroGravity data availability (DA) system. The 0G Storage layer holds three important features:
* Buit-in - It is natively built into the ZeroGravity DA system for data storage and retrieval.
* General purpose - It is designed to support atomic transactions, mutable kv stores as well as archive log systems to enable wide range of applications with various data types.
* Incentive - Instead of being just a decentralized database, 0G Storage introduces PoRA mining algorithm to incentivize storage network participants.
## Integration
We provide a [SDK](https://github.com/0glabs/0g-js-storage-sdk) for users to easily integrate 0G Storage in their applications with the following features:
* File Merkle Tree Class
* Flow Contract Types
* RPC methods support
* File upload
* Support browser environment
* Tests for different environments (In Progress)
* File download (In Progress)
## Deployment
Please refer to [Deployment](../0G%20Storage/doc/install.md) page for detailed steps to compile and start a 0G Storage node.
## Test
### Prerequisites
* Required python version: 3.8, 3.9, 3.10, higher version is not guaranteed (e.g. failed to install `pysha3`).
* Install dependencies under root folder: `pip3 install -r requirements.txt`
### Dependencies
Python test framework will launch blockchain fullnodes at local for storage node to interact with. There are 2 kinds of fullnodes supported:
* Conflux eSpace node (by default).
* BSC node (geth).
For Conflux eSpace node, the test framework will automatically compile the binary at runtime, and copy the binary to `tests/tmp` folder. For BSC node, the test framework will automatically download the latest version binary from [github](https://github.com/bnb-chain/bsc/releases) to `tests/tmp` folder.
Alternatively, you could also manually copy specific versoin binaries (conflux or geth) to the `tests/tmp` folder. Note, do **NOT** copy released conflux binary on github, since block height of some CIPs are hardcoded.
For testing, it's also dependent on the following repos:
* [0G Storage Contract](https://github.com/0glabs/0g-storage-contracts): It essentially provides two abi interfaces for 0G Storage Node to interact with the on-chain contracts.
* ZgsFlow: It contains apis to submit chunk data.
* PoraMine: It contains apis to submit PoRA answers.
* [0G Storage Client](https://github.com/0glabs/0g-storage-client): It is used to interact with certain 0G Storage Nodes to upload/download files.
### Run Tests
Go to the `tests` folder and run following command to run all tests:
```
python test_all.py
```
or, run any single test, e.g.
```
python sync_test.py
```
### Troubleshooting
1. Test failed due to blockchain full node rpc inaccessible.
* Traceback: `node.wait_for_rpc_connection()`
* Solution: unset the `http_proxy` and `https_proxy` environment variables if configured.