# Migration Guide

This guide is primarily for early Flow developers adopting Blocto wallet who want to learn about our latest progress on Flow & Blocto. Read the following guide to enhance your experience with Blocto.

{% hint style="info" %}
For why to use `@blocto/fcl` instead of `@onflow/fcl`, check out this [Github PR](https://github.com/onflow/fcl-js/pull/1679) for further information.
{% endhint %}

### Changes

* Latest version of `@blocto/fcl@1.6.1` has been released
* New version of the blocto wallet interface and endpoints
* Update some deprecated methods or properties

### Upgrading Dependency

Upgrade the `@blocto/fcl` in the package.json to `^1.6.1`

{% tabs %}
{% tab title="yarn" %}

```bash
yarn upgrade @blocto/fcl@^1.6.1
```

{% endtab %}

{% tab title="npm" %}

```bash
npm install @blocto/fcl@^1.6.1
```

{% endtab %}

{% tab title="pnpm" %}

```bash
npm install @blocto/fcl@^1.6.1
```

{% endtab %}
{% endtabs %}

### Upgrading the FCL Configuration

Replace the value of `accessNode.api` and configuration keys:

{% tabs %}
{% tab title="Mainnet" %}

```
import * as fcl from "@blocto/fcl";

fcl
  .config({
    "accessNode.api": "https://rest-mainnet.onflow.org",
    "discovery.wallet": `https://wallet-v2.blocto.app/-/flow/authn`
  })
```

{% endtab %}

{% tab title="Testnet" %}

```
import * as fcl from "@blocto/fcl";

fcl
  .config({
    "accessNode.api": "https://rest-testnet.onflow.org",
    "discovery.wallet": `https://wallet-v2-dev.blocto.app/-/flow/authn`
  })
```

{% endtab %}
{% endtabs %}

If you have been using the back channel to communicate with FCL, follow the guide below:

{% tabs %}
{% tab title="Mainnet" %}

```
import * as fcl from "@blocto/fcl";

fcl
  .config({
    "accessNode.api": "https://rest-mainnet.onflow.org",
    "discovery.wallet": "https://wallet-v2.blocto.app/api/flow/authn",
    "discovery.wallet.method": "HTTP/POST"
  })
```

{% endtab %}

{% tab title="Testnet" %}

```
import * as fcl from "@blocto/fcl";

fcl
  .config({
    "accessNode.api": "https://rest-testnet.onflow.org",
    "discovery.wallet": "https://wallet-v2-dev.blocto.app/api/flow/authn",
    "discovery.wallet.method": "HTTP/POST"
  })
```

{% endtab %}
{% endtabs %}

### FCL Wallet Discovery

Good news for those who use [wallet discovery](https://github.com/onflow/fcl-discovery) to support multiple wallet on Flow, there is no action required from your side. You can keep the configuration as you did in FCL and Blocto wallet v2 will show up there automatically.


---

# Agent Instructions: 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:

```
GET https://docs.blocto.app/blocto-sdk/javascript-sdk/flow/migration-guide.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.