docs: sync with official Polymarket docs - 2026-04-20

docs/trading/ctf/merge.md

@@ -4,12 +4,12 @@
 
 # Merge Tokens
 
-> Convert outcome token pairs back to USDC.e
+> Convert outcome token pairs back to pUSD
 
-**Merging** is the inverse of splitting — it converts a full set of outcome tokens back into USDC.e collateral. For every 1 Yes token and 1 No token you merge, you receive \$1 USDC.e. The condition must already be prepared on the CTF contract (via `prepareCondition`).
+**Merging** is the inverse of splitting — it converts a full set of outcome tokens back into pUSD collateral. For every 1 Yes token and 1 No token you merge, you receive \$1 pUSD. The condition must already be prepared on the CTF contract (via `prepareCondition`).
 
 ```
-100 Yes tokens + 100 No tokens → $100 USDC.e
+100 Yes tokens + 100 No tokens → $100 pUSD
 ```
 
 ## Prerequisites
@@ -24,14 +24,14 @@ Before merging, you need:
 
 1. You call `mergePositions()` with the amount and market details
 2. One unit of each position in a full set is burned in return for 1 collateral unit
-3. The CTF contract releases USDC.e back to your wallet
+3. The CTF contract releases pUSD back to your wallet
 
 The operation is atomic — if you don't have enough of both tokens, the transaction reverts.
 
 ## Function Parameters
 
 <ResponseField name="collateralToken" type="IERC20">
-  USDC.e (Bridged USDC) contract address: `0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174`
+  pUSD (Polymarket USD) contract address: `0xC011a7E12a19f7B1f670d46F03B03f3342E82DFB`
 </ResponseField>
 
 <ResponseField name="parentCollectionId" type="bytes32">
@@ -54,7 +54,7 @@ The operation is atomic — if you don't have enough of both tokens, the transac
 
 <CardGroup cols={2}>
   <Card title="Redeem Tokens" icon="hand-holding-dollar" href="/trading/ctf/redeem">
-    Exchange winning tokens for USDC.e after resolution
+    Exchange winning tokens for pUSD after resolution
   </Card>
 
   <Card title="CTF Overview" icon="book" href="/trading/ctf/overview">