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Stellar browser extension

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# Freighter

Freighter is a non-custodial wallet extension that enables you to sign Stellar
transactions via your browser. Learn more at
[freighter.app](https://www.freighter.app/).

## Yarn Workspaces

This repo is constructed using yarn workspaces and consists of the 4 sections:

- the browser extension (`/extension`)
- the client-facing SDK (`/@stellar/freighter-api`)
- the docs (`/docs`)
- some shared files that the above use (`/@shared/*`)

## Prerequisites

- Node (>= 22): https://nodejs.org/en/download/ (use `nvm use` — the repo has
  `.nvmrc`)
- Yarn 4.10.0: `corepack enable && corepack prepare yarn@4.10.0 --activate`

For a complete setup guide including LLM-assisted quick setup, see
[CONTRIBUTING.MD](CONTRIBUTING.MD).

## Build the extension

To simply build a production version of the extension, install the prerequisites
then navigate to this root folder (`/freighter`) in your command line and run
these 2 steps:

```
yarn install
yarn setup
```

followed by

```
yarn build:extension:production
```

This will generate the files that make up the extension in `extension/build`

## Configure environment variables

Before starting the dev server, you need to configure the backend URLs. Create a
file `extension/.env` with the following variables:

```
INDEXER_URL=your_backend_v1_prod_url_here
INDEXER_V2_URL=your_backend_v2_prod_url_here

```

These URLs should point to your deployment of Freighter backend. For more
details on backend configuration, see
[extension/README.md](extension/README.md#configure-the-backend).

If you're running the backends locally, follow the setup instructions in
[stellar/freighter-backend](https://github.com/stellar/freighter-backend) (V1)
and
[stellar/freighter-backend-v2](https://github.com/stellar/freighter-backend-v2)
(V2).

## Starting a dev environment

```
yarn setup
yarn start
```

This will start up multiple watching builds in parallel:

- The `@stellar/freighter-api` npm module
- The docs, serving on `localhost:3000`
- A dev server with the webapp running in the extension, serving on
  `localhost:9000`
- The actual built extension, able to be installed in Chrome or Firefox, in
  `build/`

Each of these will build in response to editing their source.

These can be started individually with `yarn start:\<workspace name\>` where
`\<workspace name\>` is one of:

- `freighter-api`
- `docs`
- `extension`

```
yarn build
```

This will produce final output for the docs, the `@stellar/freighter` npm
module, and the extension.

`yarn build:\<workspace name\>`, like the equivalent start commands, will build
an individual workspace.

### Testing for Safari

First you should allow unsigned extension in your safari session. This resets
every time Safari shuts down.
https://developer.apple.com/documentation/safariservices/safari_web_extensions/running_your_safari_web_extension#3744467

Next, run the Safari Extension Converter locally to convert Freighter to an
xcode project. Example from the project root -
`xcrun safari-web-extension-converter freighter/extension/build --project-location freighter-safari`

That should launch your project in xcode. You should run the project, with a
target of macos. If you have not allowed unsigned extensions, you will see a
related warning but otherwise you should see Freighter launched on your Safari
instance.

### Useful URLs:

[Configure the backend](https://github.com/stellar/freighter/blob/master/extension/README.md#configure-the-backend)

[Build the extension and install it on your machine](https://github.com/stellar/freighter/blob/master/extension/README.md#build-the-extension-and-install-it-on-your-machine)

[The popup webapp](http://localhost:9000/#/)

[The `setAllowed` playground](http://localhost:3000/docs/playground/setAllowed)

[The `requestAccess` playground](http://localhost:3000/docs/playground/requestAccess)

[The `getAddress` playground](http://localhost:3000/docs/playground/getAddress)

[The `signTransaction` playground](http://localhost:3000/docs/playground/signTransaction)

[The `addToken` playground](http://localhost:3000/docs/playground/addToken)

It's important to note that these last functions won't interact with the _dev
server_ popup UI on `localhost:9000` — you'll need to re-install the unpacked
extension each time you make a change.

### Importing a workspace

In some cases, you will want to import a workspace into another. For example, in
`extension` we need to import `@shared/constants`. To do this, simply add
`@shared/constants` to the dependencies list in package.json in `extension`.
Yarn symlinks all the workspaces, so doing so will allow you to import files
from the `@shared/constants` workspace as if it were a published npm package.

### Dependencies

Many dev dependencies (such as Typescript, linters, Webpack, etc.) have been
moved to the root `package.json` to allow devs to upgrade these libraries all in
one place.

### Pushing to repo

This repo will run a pre-push hook before pushing. This hook will run the cmd
`yarn build:extension:translations` to check if any strings in the extension
need to be added to the translations JSON. If there is no need to update the
translations JSON, the push will go through. If there is a need to update, the
changes will be automatically committed to your branch and the push will be
aborted. You will need to run `git push` again.

NOTE: If you're using nvm and run into an error where the git hook is using an
incompatible version of node, create a file `~/.huskryc` on your system and
added the following:

```
# This loads nvm.sh, sets the correct PATH before running hook, and ensures the project version of Node
export NVM_DIR="$HOME/.nvm"

[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"

# If you have an .nvmrc file, we use the relevant node version
if [[ -f ".nvmrc" ]]; then
  nvm use
fi
```

This will instruct the git hook to use the .nvmrc found in this repo.

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