Small improvement.

Author: Vadim Nicolai

crates/model/src/defi/dex.rs

@@ -99,16 +99,14 @@ impl Display for Dex {
         write!(f, "Dex(chain={}, name={})", self.chain, self.name)
     }
 }
-
 impl From<Pool> for CurrencyPair {
     fn from(p: Pool) -> Self {
-        let sym_str = format!("{}/{}", p.token0.symbol, p.token1.symbol);
-        let symbol = Symbol::from(sym_str.as_str());
-
+        let symbol = Symbol::from(format!("{}/{}", p.token0.symbol, p.token1.symbol));
         let id = InstrumentId::new(symbol, Venue::from("DEFI"));
 
-        let price_precision = 6;
-        let size_precision = 6;
+        let size_precision = p.token0.decimals;
+        let price_precision = p.token0.decimals.saturating_add(p.token1.decimals);
+
         let price_increment = Price::new(10f64.powi(-(price_precision as i32)), price_precision);
         let size_increment = Quantity::new(10f64.powi(-(size_precision as i32)), size_precision);