✨ (bitcoin-wallet): add value receiver function, but failed

Author: yuanyu90221

pointers-and-errors/bitcoin-and-wallet.go

@@ -1,10 +1,13 @@
 package pointers_and_errors
 
-// type Wallet struct {
-// }
+type Wallet struct {
+	balance int
+}
 
-// func (w Wallet) Deposit(amount int) {}
+func (w Wallet) Deposit(amount int) {
+	w.balance += amount
+}
 
-// func (w Wallet) Balance() int {
-// 	return 0
-// }
+func (w Wallet) Balance() int {
+	return w.balance
+}