fix: correct Raydium CPMM decimal offsets (331/332 not 323/324)

The CPMM pool layout has an observation_key Pubkey (32 bytes) at offset
296-328 that was missing from the layout documentation. This shifted the
decimal offsets from 323/324 to 331/332:
  328: auth_bump, 329: status, 330: lp_mint_decimals,
  331: mint_0_decimals, 332: mint_1_decimals

Verified on mainnet with SOL/USELESS CPMM pool via gRPC + live buy test.

Co-authored-by: Claude Code <noreply@anthropic.com>

Author: outsmartchad

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "outsmart",
-  "version": "2.0.0-alpha.12",
+  "version": "2.0.0-alpha.13",
   "description": "Solana trading CLI — 18 DEX adapters, 12 TX landing providers.",
   "engines": {
     "node": ">=20.0.0"

package.json

@@ -161,8 +161,8 @@ function decodeCpmmPoolInfo(data: Buffer): VaultBasedPoolInfo {
     vault1: new PublicKey(data.slice(104, 136)),
     mint0: new PublicKey(data.slice(168, 200)),
     mint1: new PublicKey(data.slice(200, 232)),
-    decimals0: data.readUInt8(323),
-    decimals1: data.readUInt8(324),
+    decimals0: data.readUInt8(331),
+    decimals1: data.readUInt8(332),
   };
 }
 

src/dex/percolator/grpc-keeper.ts

@@ -137,9 +137,14 @@ const WSOL_MINT = "So11111111111111111111111111111111111111112";
  * 136..168   lp_mint
  * 168..200   token_0_mint
  * 200..232   token_1_mint
- * ...
- * 323        mint_0_decimals (u8)
- * 324        mint_1_decimals (u8)
+ * 232..264   token_0_program
+ * 264..296   token_1_program
+ * 296..328   observation_key
+ * 328        auth_bump (u8)
+ * 329        status (u8)
+ * 330        lp_mint_decimals (u8)
+ * 331        mint_0_decimals (u8)
+ * 332        mint_1_decimals (u8)
  */
 function decodeCpmmPoolInfo(data: Buffer): VaultBasedPoolInfo {
   return {
@@ -148,8 +153,8 @@ function decodeCpmmPoolInfo(data: Buffer): VaultBasedPoolInfo {
     vault1: new PublicKey(data.slice(104, 136)),
     mint0: new PublicKey(data.slice(168, 200)),
     mint1: new PublicKey(data.slice(200, 232)),
-    decimals0: data.readUInt8(323),
-    decimals1: data.readUInt8(324),
+    decimals0: data.readUInt8(331),
+    decimals1: data.readUInt8(332),
   };
 }