changes

src/main.rs

@@ -27,6 +27,7 @@ struct Trader {
     balances: HashMap<usize,FiNum>, // Maps Currency to Amount
     }
 
+#[derive(Clone)]
 struct Asset {
     name: String,
     royalty0_rate: FiNum,	// Traders get this when entered
@@ -46,6 +47,7 @@ impl Asset {
 	    }
 	}
     }
+
 impl Trader {
     fn new(name:&str,id:usize) -> Self {
         Trader {
@@ -70,6 +72,8 @@ struct Order {
     sell_qty: FiNum,
     sell_remain: FiNum,
     buy_qty: FiNum,
+    royalty_remain: FiNum,     // Based on royalty1
+    commission_remain: FiNum,  // Based on commission1
     owner: usize,
     rt_loc: usize,      // Location in the Royalty Tree
     }
@@ -77,6 +81,7 @@ struct Order {
 struct RoyaltyTree {
     tree: Vec<Royalty>,
     next_entry: usize,
+    spare_change: FiNum, // Waiting to be distributed
     }
 
 struct Royalty {
@@ -93,7 +98,7 @@ impl Royalty {
 
 impl RoyaltyTree {
     fn new() -> Self {
-        RoyaltyTree { tree:Vec::new(), next_entry:0 }
+        RoyaltyTree { tree:Vec::new(), next_entry:0, spare_change:FiNum::new() }
         }
     fn weight_here_below(&self, index:usize) -> FiNum {
         self.tree[index].weight
@@ -151,8 +156,11 @@ impl RoyaltyTree {
         self.tree[index].acc
         }
     fn add_royalty(&mut self, amount: FiNum) {
-        let ff=self.forefather();
-        self.tree[ff].lazy+=amount;
+        if self.tree.next_entry==0 { self.spare_change+=amount }
+        else {
+            let ff=self.forefather();
+            if self.weight_here_below(ff).is_zero() { self.spare_change+=amount } else { self.tree[ff].lazy+=amount };
+            }
         }
     fn add_weight(&mut self, index: usize, weight: FiNum) {
 	if self.tree.len()>0 {
@@ -235,12 +243,9 @@ impl Market {
             royalties: HashMap::new(),
 	    royalty_rate: HashMap::new(),
             };
-        rval.register_trader("*NONE*");
+        rval.register_trader("*HOUSE*");
         rval
         }
-    fn number_to_name(&self, n: usize) -> String {
-        self.assets[n].name.clone()
-	}
     fn sanity_check(&self) {
         println!("Sanity Checking Market...");
         for (cur,amt) in self.money_supply.iter() {
@@ -276,6 +281,12 @@ impl Market {
         self.money_supply.insert(self.assets.len()-1,FiNum::new(0));
         self.assets.len()-1
         }
+    fn number_to_asset(&self, n: usize) -> Asset {
+        self.assets[n].clone()
+        }
+    fn number_to_name(&self, n: usize) -> String {
+        self.assets[n].name.clone()
+	}
     fn name_to_number(&self, name:&str) -> usize {
         *self.asset_name2num.get(name).unwrap()
         }
@@ -307,13 +318,22 @@ impl Market {
         if initial_balance<sell_qty_initial { return false; }
         let mut buy_qty=buy_qty_initial;
         let ap=(buy_type,sell_type);
+        let asset=self.number_to_asset(sell_type);
+        let mut royalty0_qty=asset.royalty0_rate*sell_qty_initial;
+        let mut royalty1_qty=asset.royalty1_rate*sell_qty_initial;
+        let mut commission0_qty=asset.commission0_rate*sell_qty_initial;
+        let mut commission1_qty=asset.commission1_rate*sell_qty_initial;
+        let sell_qty0=sell_qty_initial-royalty0_qty-royalty1_qty-commission0_qty-commission1_qty;
+        self.royalties.entry(sell_type).or_insert(RoyaltyTree::new()).add_royalty(royalty0_qty);
+        self.traders[0].add_balance(sell_type,commission0_qty);
+        self.traders[owner as usize].sub_balance(sell_type,royalty0_qty+commission0_qty);
         while buy_qty>FiNum::new(0) && self.orders.contains_key(&ap) && self.orders.get(&ap).unwrap().v.len()>0 {
             let mut elt=(*(self.orders.get(&ap).unwrap().v[0].borrow())).clone();
-            if sell_qty_initial/buy_qty_initial>=elt.buy_qty/elt.sell_qty { // Transact at ask_rate
+            if sell_qty0/buy_qty_initial>=elt.buy_qty/elt.sell_qty { // Transact at ask_rate
                 let qty=std::cmp::min(elt.sell_remain,buy_qty);
                 elt.sell_remain-=qty;
                 buy_qty-=qty;
-                let pay_qty=qty*elt.buy_qty/elt.sell_qty; // 1.8499*194623/2.9744
+                let pay_qty=qty*elt.buy_qty/elt.sell_qty;
                 self.traders[owner     as usize].sub_balance(sell_type,pay_qty);
                 self.traders[owner     as usize].add_balance(buy_type ,qty); 
                 self.traders[elt.owner as usize].add_balance(sell_type,pay_qty);
@@ -325,7 +345,7 @@ impl Market {
             let ap=(sell_type,buy_type);
             if let None=self.orders.get_mut(&ap) { self.orders.insert(ap,PQueue::new()); }
             let bids=self.orders.get_mut(&ap).unwrap();
-            let sell_qty_remain=sell_qty_initial*buy_qty/buy_qty_initial;
+            let sell_qty_remain=sell_qty0*buy_qty/buy_qty_initial;
             if sell_qty_remain>0.into() {
                 let rt=self.royalties.entry(buy_type).or_insert(RoyaltyTree::new());
 		rt.add_weight(rt.next_entry,buy_qty); // Weight should really be the quantity you would be able to immediately transact rather than how much you wish for.