[move] Adds Coin::zero() (MystenLabs#823)

- adds Coin::zero() method
F1OREZ · Mar 14, 2022 · 1aa9f8f · 1aa9f8f
1 parent 3ea6050
commit 1aa9f8f
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/sui_programmability/framework/sources/Coin.move b/sui_programmability/framework/sources/Coin.move
@@ -84,6 +84,12 @@ module Sui::Coin {
 
     // === Registering new coin types and managing the coin supply ===
 
+    /// Make any Coin with a zero value. Useful for placeholding
+    /// bids/payments or preemptively making empty balances.
+    public fun zero<T>(ctx: &mut TxContext): Coin<T> {
+        Coin { id: TxContext::new_id(ctx), value: 0 }
+    }
+
     /// Create a new currency type `T` as and return the `TreasuryCap`
     /// for `T` to the caller.
     /// NOTE: It is the caller's responsibility to ensure that