Go Money

Golang pure money calculation library provides safety and ease of use.

Usage

go-money can parse money string to money type but you can use numbers as input too.

	moneyOne, _ := money.ParseCAD("-$100.90")
	moneyTwo, _ := money.ParseCAD(".90$")

	result := moneyOne.Sub(*moneyTwo)
	fmt.Printf("money is : %v\n", result) // will prints money is : CAD$-101.80

You can pass all valid money string like $CAD-9.0 , CAD$79 , 23.65 , -0.9 , .09 , 78.98CAD , 98.07$ and ...

It also provides inner umarshaler,unmarshaler,Scanner and valuer which make it super easy to use

unmarshal

	type jsonType struct {
		User  string    `json:"user"`
		Money money.CAD `json:"money"`
	}
	var someStruct jsonType
	someJsonString := `{"user":"amupxm","money":"-78.23"}`
	json.Unmarshal([]byte(someJsonString), &someStruct)
	fmt.Printf("Unmarshaled money as cents : %v\n", someStruct.Money.AsCent()) // Unmarshaled money as cents : -7823

marshal

	data := struct {
		Type  string    `json:"type"`
		Money money.CAD `json:"money"`
	}{
		Type:  "Offer",
		Money: *money.NewMoney(99, 99),
	}
	b, _ := json.Marshal(data)
	fmt.Printf("Marshaled money is : %v\n", string(b)) // Marshaled money is : {"type":"Offer","money":"CAD$99.99"}

And you can scan,value to sql/database without any troubles =)

    var theMoney money.CAD
	data := struct {
		UserName  string    `json:"user_name"`
		Money money.CAD `json:"money"`
	}{
		UserName:  "amupxm",
		Money: *money.NewMoney(99, 99),
	}
	err := pg.db.QueryRow(`INSERT INTO transactions (username, money)
	 VALUES ($1, $2) RETURNING money`, user.UserName,user.money).Scan(&theMoney)
    fmt.Println("Money is %v\n" ,theMoney )  // Money is : CAD$99.99

Money type in compatible with postgres monet type.

Give star if interested :star2: