docs: sync with docs.polymarket.com - 2026-05-08

docs/trading/clients/l1.md

@@ -51,7 +51,8 @@ L1 methods require the client to initialize with a signer.
 </Tabs>
 
 <Warning>
-  Never commit private keys to version control. Always use environment variables or a secure key management system.
+  Never commit private keys to version control. Always use environment variables
+  or a secure key management system.
 </Warning>
 
 ***
@@ -256,7 +257,8 @@ async createMarketOrder(
 </ResponseField>
 
 <ResponseField name="amount" type="number">
-  The order amount. For BUY orders this is a dollar amount; for SELL orders this is the number of shares.
+  The order amount. For BUY orders this is a dollar amount; for SELL orders this
+  is the number of shares.
 </ResponseField>
 
 <ResponseField name="side" type="Side">
@@ -268,7 +270,8 @@ async createMarketOrder(
 </ResponseField>
 
 <ResponseField name="orderType" type="OrderType.FOK | OrderType.FAK">
-  Optional order type, either FOK (Fill-Or-Kill) or FAK (Fill-And-Kill). Optional.
+  Optional order type, either FOK (Fill-Or-Kill) or FAK (Fill-And-Kill).
+  Optional.
 </ResponseField>
 
 <ResponseField name="salt" type="string">
@@ -353,12 +356,15 @@ async createMarketOrder(
   <Accordion title="Error - Invalid Funder Address">
     Your funder address is incorrect or doesn't match your wallet.
 
-    **Solution:** Check your proxy wallet address at [polymarket.com/settings](https://polymarket.com/settings). If it doesn't exist, the user has never logged in to Polymarket.com — deploy the proxy wallet first before creating L2 credentials.
+    **Solution:** New API users should use the deposit wallet address as the
+    funder with signature type `3`. Existing Safe and Proxy users should use
+    their current smart-wallet address.
   </Accordion>
 
   <Accordion title="Lost API credentials but have nonce">
+    Use `deriveApiKey()` with the original nonce:
+
     ```typescript theme={null}
-    // Use deriveApiKey with the original nonce
     const recovered = await client.deriveApiKey(originalNonce);
     ```
   </Accordion>