docs: update SDK quickstart and request update guide

docs/advanced/request-network-sdk/get-started/quickstart-node.js.md

@@ -8,15 +8,15 @@ This approach works well for Node.js environments _without_ access to a Web3 wal
 You will learn:
 
 * How to create a request
-* How to update a request (coming soon...)
+* How to update a request
 * How to pay a request
 * How to detect a payment
 * How to retrieve a user’s requests
 {% endhint %}
 
 ## Repository
 
-All of the following examples can be found in this repository [https://github.com/RequestNetwork/quickstart-node.js](https://github.com/RequestNetwork/quickstart-node.js)
+All of the following examples can be found in this repository [https://github.com/RequestNetwork/quickstart-node-js](https://github.com/RequestNetwork/quickstart-node-js)
 
 ## Create a request
 
@@ -127,6 +127,23 @@ Altogether it looks like this:
 
 {% @github-files/github-code-block url="https://github.com/RequestNetwork/quickstart-node-js/blob/main/src/createRequest.js" %}
 
+## Update a request
+
+After creating a request, you might need to update it (e.g., to cancel it or adjust the amount). Updates require a `signatureProvider`.
+
+```javascript
+const request = await requestClient.fromRequestId('YOUR_REQUEST_ID');
+
+// Payer accepts the request
+await request.accept({
+  type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+  value: payerIdentity,
+});
+await request.waitForConfirmation();
+```
+
+See the [Updating a Request](../sdk-guides/request-client/updating-a-request.md) guide for more details.
+
 ## Pay a request / Detect a payment
 
 First, construct a `RequestNetwork` object and connect it to a Request Node. In this example, we use the Sepolia Request Node Gateway:
@@ -171,7 +188,9 @@ const payerWallet = new Wallet(
 {% endtab %}
 
 {% tab title="viem" %}
-Coming soon. Probably involves `publicClientToProvider()` and `walletClientToSigner()`.
+In Node.js with a private key, use ethers v5 directly (see tab above).
+
+The viem-to-ethers adapter patterns in the [Browser Quickstart](quickstart-browser.md) are designed for browser wallets with EIP-1193 interfaces. In Node.js, simply create an ethers `JsonRpcProvider` and `Wallet` from your RPC URL and private key.
 {% endtab %}
 {% endtabs %}
 

docs/advanced/request-network-sdk/sdk-guides/request-client/updating-a-request.md

@@ -1,7 +1,89 @@
 # Updating a Request
 
-After a request is created, it can be updated:
+After a request is created, it can be updated by the authorized parties. Each update requires a signature and is persisted to the Request Network.
 
-<table data-full-width="true"><thead><tr><th>Name</th><th>Description</th><th>Role Authorized</th></tr></thead><tbody><tr><td><strong>accept</strong></td><td>accept a request, indicating that it will be paid</td><td>payer</td></tr><tr><td><strong>cancel</strong></td><td>cancel a request</td><td>payee, payer</td></tr><tr><td><strong>reduceExpectedAmount</strong></td><td>reduce the expected amount</td><td>payee</td></tr><tr><td><strong>increaseExpectedAmount</strong></td><td>increase the expected amount</td><td>payer</td></tr><tr><td><strong>addStakeholders</strong></td><td>grant 1 or more third parties access to view an encrypted request</td><td>payee, payer, third party</td></tr></tbody></table>
+## Summary of Actions
 
-Feature exists. More docs coming soon...
+| Action | Description | Authorized Role |
+| :--- | :--- | :--- |
+| **accept** | Accept a request, indicating that it will be paid | Payer |
+| **cancel** | Cancel a request | Payee or Payer |
+| **reduceExpectedAmount** | Reduce the expected amount | Payee |
+| **increaseExpectedAmount** | Increase the expected amount | Payer |
+| **addStakeholders** | Grant 1 or more third parties access to view an encrypted request | Payee, Payer, or Third Party |
+
+## Examples
+
+### Initialize the Request Client
+
+First, retrieve the request you want to update. You must provide a `signatureProvider` to sign the update transactions.
+
+```javascript
+const { RequestNetwork, Types } = require("@requestnetwork/request-client.js");
+
+const requestClient = new RequestNetwork({
+  nodeConnectionConfig: { baseURL: "https://sepolia.gateway.request.network/" },
+  signatureProvider: epkSignatureProvider, // Required for updates
+});
+
+const request = await requestClient.fromRequestId('YOUR_REQUEST_ID');
+```
+
+### Accept a Request (Payer)
+
+The payer can accept a request to signal their intention to pay.
+
+```javascript
+const updatedRequestData = await request.accept({
+  type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+  value: payerIdentity,
+});
+
+// Wait for the update to be persisted
+await request.waitForConfirmation();
+```
+
+### Cancel a Request (Payee or Payer)
+
+Either the payee or the payer can cancel a request.
+
+```javascript
+const updatedRequestData = await request.cancel({
+  type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+  value: signerIdentity,
+});
+
+await request.waitForConfirmation();
+```
+
+### Increase Expected Amount (Payer)
+
+The payer can increase the expected amount (e.g., adding a tip or adjusting for additional services).
+
+```javascript
+const updatedRequestData = await request.increaseExpectedAmountRequest(
+  '100000000000000000', // Amount to add in base units (e.g., 0.1 ETH)
+  {
+    type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+    value: payerIdentity,
+  }
+);
+
+await request.waitForConfirmation();
+```
+
+### Reduce Expected Amount (Payee)
+
+The payee can reduce the expected amount (e.g., applying a discount).
+
+```javascript
+const updatedRequestData = await request.reduceExpectedAmountRequest(
+  '100000000000000000', // Amount to subtract in base units
+  {
+    type: Types.Identity.TYPE.ETHEREUM_ADDRESS,
+    value: payeeIdentity,
+  }
+);
+
+await request.waitForConfirmation();
+```