Check exponent range (#179)

Co-authored-by: Jayant Krishnamurthy <[email protected]>

Author: jayantk

program/src/oracle/oracle.h

@@ -20,7 +20,9 @@ extern "C" {
 #define PC_PUBKEY_SIZE_64   (PC_PUBKEY_SIZE/sizeof(uint64_t))
 #define PC_MAP_TABLE_SIZE   640
 #define PC_COMP_SIZE         32
-#define PC_MAX_NUM_DECIMALS  16
+// Bound on the range of the exponent in price accounts. This number is set such that the
+// PD-based EMA computation does not lose too much precision.
+#define PC_MAX_NUM_DECIMALS   8
 #define PC_PROD_ACC_SIZE    512
 #define PC_EXP_DECAY         -9
 // If ci > price / PC_MAX_CI_DIVISOR, set publisher status to unknown.