🤗 [Question]: Validate request params

[meldumm]

Question Description

Request:

{
    "tokens": [{
        "address": "test",
        "decimals": "1"
    }]
}

If a user sends a request with a string instead of an int for decimals, the following error will be returned:

runtime error: invalid memory address or nil pointer dereference

Is there a way to validate the request body and return a proper error message to the user?

Code Snippet (optional)

type Token struct {
	Address  string `json:"address"`
	Decimals int    `json:"decimals"`
}

type tokenAddRequestParams struct {
	Tokens        []Token `json:"tokens"`
}

func AddTokens(c *fiber.Ctx) error {
	var req tokenAddRequestParams
	if err := c.BodyParser(&req); err != nil {
		return nil, c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Cannot parse JSON"})
	}
}

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have checked for existing issues that describe my questions prior to opening this one.
• I understand that improperly formatted questions may be closed without explanation.

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[ReneWerner87]

is this a proposal for V2 or V3 ?

[meldumm]

This is a question for V2

[sixcolors]

Can you provide a minimal runnable example?

[meldumm]

The issue was identified in a different section of the code. Thank you for your assistance