refactor: reposition constructor method

pop-api/examples/fungibles/lib.rs

@@ -24,6 +24,39 @@ mod fungibles {
 		id: TokenId,
 	}
 
+	impl Fungibles {
+		/// Instantiate the contract and wrap around an existing token.
+		///
+		/// # Parameters
+		/// * - `token` - The token.
+		#[ink(constructor, payable)]
+		pub fn new_existing(id: TokenId) -> PSP22Result<Self> {
+			// Make sure token exists.
+			if !api::token_exists(id).unwrap_or_default() {
+				return Err(PSP22Error::Custom(String::from("Unknown")));
+			}
+			let contract = Self { id };
+			Ok(contract)
+		}
+
+		/// Instantiate the contract and create a new token. The token identifier will be stored
+		/// in contract's storage.
+		///
+		/// # Parameters
+		/// * - `id` - The identifier of the token.
+		/// * - `admin` - The account that will administer the token.
+		/// * - `min_balance` - The minimum balance required for accounts holding this token.
+		#[ink(constructor, payable)]
+		pub fn new(id: TokenId, admin: AccountId, min_balance: Balance) -> PSP22Result<Self> {
+			api::create(id, admin, min_balance).map_err(PSP22Error::from)?;
+			let contract = Self { id };
+			contract
+				.env()
+				.emit_event(Created { id, creator: contract.env().account_id(), admin });
+			Ok(contract)
+		}
+	}
+
 	impl Psp22 for Fungibles {
 		#[ink(message)]
 		fn total_supply(&self) -> Balance {
@@ -102,37 +135,4 @@ mod fungibles {
 			api::token_decimals(self.id).unwrap_or_default()
 		}
 	}
-
-	impl Fungibles {
-		/// Instantiate the contract and wrap around an existing token.
-		///
-		/// # Parameters
-		/// * - `token` - The token.
-		#[ink(constructor, payable)]
-		pub fn new_existing(id: TokenId) -> PSP22Result<Self> {
-			// Make sure token exists.
-			if !api::token_exists(id).unwrap_or_default() {
-				return Err(PSP22Error::Custom(String::from("Unknown")));
-			}
-			let contract = Self { id };
-			Ok(contract)
-		}
-
-		/// Instantiate the contract and create a new token. The token identifier will be stored
-		/// in contract's storage.
-		///
-		/// # Parameters
-		/// * - `id` - The identifier of the token.
-		/// * - `admin` - The account that will administer the token.
-		/// * - `min_balance` - The minimum balance required for accounts holding this token.
-		#[ink(constructor, payable)]
-		pub fn new(id: TokenId, admin: AccountId, min_balance: Balance) -> PSP22Result<Self> {
-			api::create(id, admin, min_balance).map_err(PSP22Error::from)?;
-			let contract = Self { id };
-			contract
-				.env()
-				.emit_event(Created { id, creator: contract.env().account_id(), admin });
-			Ok(contract)
-		}
-	}
 }