✨ (bitcoin-wallet): type alias with Bitcoin

yuanyu90221 · yuanyu90221 · commit 4b9f6f29d415 · 2025-06-07T18:01:51.000+08:00
diff --git a/pointers-and-errors/bitcoin-and-wallet.go b/pointers-and-errors/bitcoin-and-wallet.go
@@ -1,13 +1,14 @@
 package pointers_and_errors
 
+type Bitcoin int
 type Wallet struct {
-	balance int
+	balance Bitcoin
 }
 
-func (w *Wallet) Deposit(amount int) {
+func (w *Wallet) Deposit(amount Bitcoin) {
 	w.balance += amount
 }
 
-func (w *Wallet) Balance() int {
+func (w *Wallet) Balance() Bitcoin {
 	return w.balance
 }
diff --git a/pointers-and-errors/bitcoin-and-wallet_test.go b/pointers-and-errors/bitcoin-and-wallet_test.go
@@ -8,7 +8,7 @@ func TestWallet(t *testing.T) {
 
 	wallet.Deposit(10)
 	got := wallet.Balance()
-	want := 10
+	want := Bitcoin(10)
 	if got != want {
 		t.Errorf("got %d, want %d", got, want)
 	}

Original file line number	Diff line number	Diff line change
`@@ -1,13 +1,14 @@`
`1`	`1`	`package pointers_and_errors`
`2`	`2`
	`3`	`+type Bitcoin int`
`3`	`4`	`type Wallet struct {`
`4`		`- balance int`
	`5`	`+ balance Bitcoin`
`5`	`6`	`}`
`6`	`7`
`7`		`-func (w *Wallet) Deposit(amount int) {`
	`8`	`+func (w *Wallet) Deposit(amount Bitcoin) {`
`8`	`9`	`w.balance += amount`
`9`	`10`	`}`
`10`	`11`
`11`		`-func (w *Wallet) Balance() int {`
	`12`	`+func (w *Wallet) Balance() Bitcoin {`
`12`	`13`	`return w.balance`
`13`	`14`	`}`