# on Stellar

In this guide, you'll learn how to initialize a Stellar-based Substreams project within the Dev Container.

{% hint style="info" %}
The CLI installation is supported only on Linux and macOS. If you're using Windows, consider using the [DevContainer environment](/reference-material/development-tools/devcontainer-ref.md), which launches a Linux-based virtual environment.
{% endhint %}

## Step 1: Initialize Your Stellar Substreams Project

1. [Install the Substreams CLI](/how-to-guides/installing-the-cli.md).
2. Running `substreams init` will give you the option to choose between two Stellar project options. Select the one that best fits your requirements:
   * **stellar-minimal**: Creates a simple Substreams that extracts raw Stellar block data and generates corresponding Rust code. This path will start you with the full raw block, you can navigate to the `substreams.yaml` (the manifest) to modify the input.
   * **stellar-transactions-operations**: Creates a Substreams that extracts and decodes Stellar trasactions or operations using the cached [Stellar Foundational Module](https://substreams.dev/packages/stellar-foundational/v0.3.0). If you choose the index transactions, you will be able to filter by **source account(s)**. If you choose to index operations, you will be able to filter by **operation name**.

{% hint style="info" %}
The first streamable block for Stellar on Substreams is currently 55,411,000.
{% endhint %}

{% hint style="info" %}
The `stellar-transactions-operations` foundational module **only decodes and indexes SOME operations**. However, you can [modify the code](https://github.com/streamingfast/substreams-foundational-modules/blob/develop/stellar-common/src/operations.rs#L16) to include the decoding of other operations if needed.

Please, find below the operations supported:

```rust
&Op::CreateAccount(_) => "create_account",
&Op::AccountMerge(_) => "account_merge",
&Op::Payment(_) => "payment",
&Op::CreateClaimableBalance(_) => "create_claimable_balance",
&Op::ClaimClaimableBalance(_) => "claim_claimable_balance",
&Op::Clawback(_) => "clawback",
&Op::ClawbackClaimableBalance(_) => "clawback_claimable_balance",
&Op::AllowTrust(_) => "allow_trust",
&Op::SetTrustLineFlags(_) => "set_trust_line_flags",
&Op::LiquidityPoolDeposit(_) => "liquidity_pool_deposit",
&Op::LiquidityPoolWithdraw(_) => "liquidity_pool_withdraw",
&Op::ManageBuyOffer(_) => "manage_buy_offer",
&Op::ManageSellOffer(_) => "manage_sell_offer",
&Op::CreatePassiveSellOffer(_) => "create_passive_sell_offer",
&Op::PathPaymentStrictSend(_) => "path_payment_strict_send",
&Op::PathPaymentStrictReceive(_) => "path_payment_strict_receive",
```

{% endhint %}

## Step 2: Visualize the Data

1. Run `substreams auth` to create your [account](https://thegraph.market/) and generate an authentication token (JWT), then pass this token back as input.
2. Now you can freely use the `substreams gui` to visualize and iterate on your extracted data.

## Step 2.5: (Optionally) Transform the Data

Within the generated directories, modify your Substreams modules to include additional filters, aggregations, and transformations, then update the manifest accordingly. To learn more about this, visit the [How-to-Guides](/how-to-guides/develop-your-own-substreams.md)

## Step 3: Load the Data

To make your Substreams queryable (as opposed to [direct streaming](/how-to-guides/sinks/stream.md)), you can automatically generate a SQL sink.

## Additional Resources

You may find these additional resources helpful for developing your first Stellar application.

### Dev Container Reference

The [Dev Container Reference](/reference-material/development-tools/devcontainer-ref.md) helps you navigate the container and its common errors.

### CLI Reference

The [CLI reference](/reference-material/command-line-interface.md) lets you explore all the tools available in the Substreams CLI.

### Substreams Components Reference

The [Components Reference](https://github.com/streamingfast/substreams/blob/develop/docs/new/references/substreams-components/README.md) dives deeper into navigating the `substreams.yaml`.


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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.substreams.dev/tutorials/intro-to-tutorials/stellar.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.