> For the complete documentation index, see [llms.txt](https://docs.freighter.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.freighter.app/extension-freighter-api/signing.md).

# Signing

Sign transactions, authorization entries, and arbitrary messages using the user's Freighter wallet.

## Signing a Transaction

### `signTransaction()`

Pass a transaction XDR string to Freighter for the user to review and sign.

```
signTransaction(xdr: string, opts?: {
  network?: string,
  networkPassphrase?: string,
  address?: string
}) -> Promise<{ signedTxXdr: string; signerAddress: string } & { error?: FreighterApiError }>
```

The user will review the transaction details before signing.

**Parameters**

| Parameter                | Type     | Description                                                                                 |
| ------------------------ | -------- | ------------------------------------------------------------------------------------------- |
| `xdr`                    | `string` | **Required.** Base64-encoded transaction XDR.                                               |
| `opts.network`           | `string` | Network name (maps to `Networks` enum in `@stellar/stellar-sdk`).                           |
| `opts.networkPassphrase` | `string` | Custom passphrase. Ignored if `network` is also provided.                                   |
| `opts.address`           | `string` | Request a specific account's signature. Freighter will switch to that account if available. |

{% hint style="info" %}
Passing `network` or `networkPassphrase` lets Freighter warn the user if their wallet is configured to the wrong network.
{% endhint %}

**Example**

```typescript
import { signTransaction } from "@stellar/freighter-api";

const { signedTxXdr, signerAddress, error } = await signTransaction(xdr, {
  network: "TESTNET",
  address: "G...", // optional: request a specific account
});

if (error) {
  console.error("Signing failed:", error.message);
} else {
  console.log("Signed by:", signerAddress);
  console.log("Signed XDR:", signedTxXdr);
}
```

**Errors**

| Condition               | Error message                                |
| ----------------------- | -------------------------------------------- |
| User rejected           | `"The user rejected this request."`          |
| Extension not installed | `"The wallet encountered an internal error"` |

## Signing an Auth Entry

### `signAuthEntry()`

Sign an [authorization entry preimage](https://github.com/stellar/js-stellar-base/blob/a9567e5843760bfb6a8b786592046aee4c9d38b2/types/next.d.ts#L6895) and receive the signed hash back as a base64 string. Used for [Soroban contract authorization](https://developers.stellar.org/docs/smart-contracts/guides/auth/authorization) flows.

```
signAuthEntry(entryXdr: string, opts: {
  address: string
}) -> Promise<{ signedAuthEntry: string | null; signerAddress: string } & { error?: FreighterApiError }>
```

See the [`authorizeEntry` helper](https://github.com/stellar/js-stellar-base/blob/e3d6fc3351e7d242b374c7c6057668366364a279/src/auth.js#L97) in `js-stellar-base` for how signed auth entries are used, or the [Soroban development documentation](https://developers.stellar.org/docs/smart-contracts) for wallet-side patterns.

**Example**

```typescript
import { signAuthEntry } from "@stellar/freighter-api";

const { signedAuthEntry, signerAddress, error } = await signAuthEntry(entryXdr, {
  address: "G...",
});

if (error) {
  console.error("Auth entry signing failed:", error.message);
} else {
  console.log("Signed auth entry:", signedAuthEntry);
}
```

**Errors**

| Condition     | Error message                       |
| ------------- | ----------------------------------- |
| User rejected | `"The user rejected this request."` |

## Signing a Message

### `signMessage()`

Sign an arbitrary string and receive a base64-encoded Ed25519 signature. Follows [SEP-53](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0053.md).

```
signMessage(message: string, opts: {
  address: string
}) -> Promise<{ signedMessage: string | null; signerAddress: string } & { error?: FreighterApiError }>
```

**Example**

```typescript
import { signMessage } from "@stellar/freighter-api";

const { signedMessage, signerAddress, error } = await signMessage(
  "Verify account ownership",
  { address: "G..." },
);

if (error) {
  console.error("Message signing failed:", error.message);
} else {
  console.log("Signature:", signedMessage);
}
```

**Errors**

| Condition     | Error message                       |
| ------------- | ----------------------------------- |
| User rejected | `"The user rejected this request."` |

## Full Example: Connect, Sign, and Submit

A complete flow from connection to Horizon submission:

```typescript
import { isConnected, requestAccess, signTransaction } from "@stellar/freighter-api";
import { Server, TransactionBuilder } from "@stellar/stellar-sdk";

// 1. Check Freighter is installed
const connectResult = await isConnected();
if (!connectResult.isConnected) {
  throw new Error("Freighter not found");
}

// 2. Request the user's public key
const accessResult = await requestAccess();
if (accessResult.error) {
  throw new Error(accessResult.error.message);
}

// 3. Sign the transaction
const xdr = "AAAAAgAAAAA..."; // your assembled transaction XDR
const signResult = await signTransaction(xdr, {
  network: "TESTNET",
  address: accessResult.address,
});
if (signResult.error) {
  throw new Error(signResult.error.message);
}

// 4. Submit to Horizon
const server = new Server("https://horizon-testnet.stellar.org");
const tx = TransactionBuilder.fromXDR(
  signResult.signedTxXdr,
  "Test SDF Network ; September 2015",
);
const response = await server.submitTransaction(tx);
console.log("Transaction submitted:", response.hash);
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

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

```
GET https://docs.freighter.app/extension-freighter-api/signing.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.