WIP: Update Substreams documentation

website/pages/en/substreams.mdx

@@ -4,43 +4,36 @@ title: Substreams
 
 ![Substreams Logo](/img/substreams-logo.png)
 
-Substreams is a powerful blockchain indexing technology developed for The Graph Network. It enables developers to write Rust modules, compose data streams alongside the community, and provide extremely high-performance indexing due to parallelization in a streaming-first approach.
+Substreams is a powerful blockchain indexing technology developed to improve The Graph Network:
+- Substreams allows you to speed up the indexing times of your subgraph.
+- Substreams allows you to index non-EVM data (Solana, Injective, Starknet, Vara...)
 
-With Substreams, developers can quickly extract data from different blockchains (Ethereum, BNB, Solana, ect.) and send it to various locations of their choice, such as a Postgres database, a Mongo database, or a Subgraph. Additionally, Substreams packages enable developers to specify which data they want to extract from the blockchain.
+This is possible because your subgraph can use a Substreams package as a data source, thus creating a Substreams-powered Subgraph (SpS).
+A Substreams package a binary file that contains all the definitions of the data that you want to extract from the blockchain (similar to the `mapping.ts` file of your subgraph).
 
-## How Substreams Works in 4 Steps
+The following example shows a subgraph manifest (`subgraph.yaml`) that uses a Substreams package as data source, thus receiving the data extracted by the Substreams.
+Then, you can use this data in your `mapping.ts` and perform all the transformations needed as a usual subgraph.
 
-1. **You write a Rust program, which defines the transformations that you want to apply to the blockchain data.** For example, the following Rust function extracts relevant information from an Ethereum block (number, hash, and parent hash).
+// example
 
-```rust
-fn get_my_block(blk: Block) -> Result<MyBlock, substreams::errors::Error> {
-    let header = blk.header.as_ref().unwrap();
+## Find Substreams packages
 
-    Ok(MyBlock {
-        number: blk.number,
-        hash: Hex::encode(&blk.hash),
-        parent_hash: Hex::encode(&header.parent_hash),
-    })
-}
-```
+There are many Substreams packages already built that you can simply import into your subgraph.
+[substreams.dev](https://substreams.dev) is a Substreams registry where you can explore different Substreams packages for several blockchain networks.
 
-2. **You wrap up your Rust program into a WASM module just by running a single CLI command.**
+// image
 
-3. **The WASM container is sent to a Substreams endpoint for execution.** The Substreams provider feeds the WASM container with the blockchain data and the transformations are applied.
+## Create Your Own Substreams Package
 
-4. **You select a [sink](https://substreams.streamingfast.io/documentation/consume/other-sinks), a place where you want to send the transformed data** (a Postgres database or a Subgraph, for example).
+If you can't find a Substreams package that fits your needs, you can create your own package.
+Creating a Substreams involves a Rust function that selects which specific data you want to extract from the network.
 
-## Substreams Documentation
+However, the Substreams CLI allows you to auto-generate a Substreams project without writing any code.
+You can import Solana transactions or Vara extrinsics in your subgraph by using the auto-generation tools provided by The Graph.
 
-The official Substreams documentation is currently maintained by the StreamingFast team [on the StreamingFast website](https://substreams.streamingfast.io/).
+In the folllowing example, you run the `substreams init` command (similar to the `graph init` command), where you can select which kind of project you want to initialize.
+You can choose among a variety of project generations (Solana transactions, EVM events and calls, Starknet transactions...).
 
-To learn about the latest version of Substreams CLI, which enables developers to bootstrap a Substreams project without any code, please check [Substreams Codegen](https://streamingfastio.medium.com/substreams-codegen-no-code-tool-to-bootstrap-your-project-a11efe0378c6).
+// image
 
-### Getting Started
-
-- In order to develop and deploy a Substreams, [you must install the Substreams CLI](https://substreams.streamingfast.io/documentation/consume/installing-the-cli).
-- Then, run your first Substreams by following the [Quickstart Tutorial](https://substreams.streamingfast.io/documentation/develop/init-project).
-
-### Expand Your Knowledge
-
-- Take a look at the [Ethereum Explorer Tutorial](https://substreams.streamingfast.io/tutorials/evm) to learn about the basic transformations you can create with Substreams.
+From the generated project, you can run `substreams codegen subgraph` to convert the Substreams project into a ready-to-deploy subgraph project!

website/pages/en/substreams/getting-started.md

@@ -0,0 +1,44 @@
+---
+title: Getting Started with Substreams
+---
+
+## Getting Started
+
+The easiest way to get started with Substreams is by using one of the auto-generation tools. The Substreams CLI provides the `substreams init` command, which will allow you to initialize your Substreams project for several blockchains (EVM, Solana, Injective...).
+
+The Substreams CLI is pretty similar to The Graph CLI: you install it in your computer and execution the different commands available.
+
+### The Development Environment
+
+To facilitate the development of Substreams-powered Subgraphs, a local development environment for VSCode is available, the [substreams-starter](https://github.com/streamingfast/substreams-starter) project.
+
+The development environment is a VSCode extension that spins up all the necessary dependencies in Docker containers:
+- A terminal-based environment with the Substreams CLI pre-installed, so you don't have to install 
+- A Graph Node instance, which you can uses to test your subgraph locally.
+- A PostgreSQL instance, which is used by the Graph Node to store all the necessary data for your subgraphs.
+- An IPFS instance, which is used by the Graph Node to store the _build_ files of the subgraph.
+
+You can run the development environment locally (you need both VSCode and Docker) or remotely through GitHub codespaces.
+
+#### Run the Development Environment Locally
+
+To run it locally, simply open the [substreams-starter](https://github.com/streamingfast/substreams-starter) in your local VSCode application.
+
+#### Run the Development Environment Remotely
+
+To run it in GitHub codespace, open [this link](https://github.com/codespaces/new/streamingfast/substreams-starter?machine=standardLinux32gb) (`https://github.com/codespaces/new/streamingfast/substreams-starter?machine=standardLinux32gb`) in your browser. Log in with GitHub and you will get access to a VSCode instance in your browser.
+
+### Initialize Your Substreams Project
+
+In the development environment, you will have access to the `substreams init` command. Depending on the type of project that you want to initialize, the flow will be different. Choose which blockchain you want to index:
+
+
+
+### Generate Your Subgraph Project
+
+From the generated Substreams project, you can create a Substreams-powered Subgraph project that uses the Substreams as data source.
+
+In the folder of the Substreams project, run `substreams codegen subgraph` and choose the module that you want your subgraph to consume. A new `subgraph` folder will be created with ready-to-deploy subgraph.
+
+
+