How to Validate Trello Webhook Signatures in Golang Fiber?

Question

I wrote the below code by Following: https://developer.atlassian.com/cloud/trello/guides/rest-api/webhooks/ Node.js Reference in Golang Fiber But Hash is not the same as Given Hash, Anyone kindly tell me what I missed? Thanks in advance.

func TrelloWebhook(c *fiber.Ctx) error {
    var (
        TRELLO_SECRET = "****ea6308995"
        webhookURL    = "https://*****ssum.ngrok-free.app/trello-webhook"
    )

    base64Digest := func(secret string) string {
        key := []byte(TRELLO_SECRET)
        mac := hmac.New(sha1.New, key)
        mac.Write([]byte(secret))
        return base64.StdEncoding.EncodeToString(mac.Sum(nil))
    }

    hashedHeader := c.Get("x-trello-webhook")
    requestBody := string(c.BodyRaw())

    doubleHashedHeader := base64Digest(hashedHeader)
    doubleHashedBody := base64Digest(base64Digest(requestBody + webhookURL))

    fmt.Println("doubleHashedHeader : ", doubleHashedHeader)
    fmt.Println("doubleHashedBody : ", doubleHashedBody)

    if hmac.Equal([]byte(doubleHashedHeader), []byte(doubleHashedBody)) {
        fmt.Println("SUCCESS")
    }
    // Your existing return statement
    return c.Status(200).JSON(&fiber.Map{
        "status":      true,
        "information": "customers-data_request!",
    })
}

I also tryed below ways too it's also not working

func TrelloWebhook(c *fiber.Ctx) error {

    secret := "****ea6308995"
    callbackURL := "https://*****ssum.ngrok-free.app/trello-webhook"

    base64Digest := func(s string) string {
        h := hmac.New(sha1.New, []byte(secret))
        h.Write([]byte(s))
        return base64.StdEncoding.EncodeToString(h.Sum(nil))
    }

    var request map[string]interface{}
    if err := json.Unmarshal(c.Body(), &request); err != nil {
        fmt.Println("Error decoding JSON:", err)
        return c.SendStatus(fiber.StatusBadRequest)
    }

    contentBuffer := bytes.NewBuffer(c.Body())
    contentBuffer.WriteString(callbackURL)
    content := contentBuffer.String()

    doubleHash := base64Digest(content)
    headerHash := c.Get("x-trello-webhook")

    if doubleHash == headerHash {
        fmt.Println(" Working ? ")
    }

    fmt.Println("doubleHash : ", doubleHash)
    fmt.Println("headerHash : ", headerHash)

    // Your existing return statement
    return c.Status(200).JSON(&fiber.Map{
        "status":      true,
        "information": "customers-data_request!",
    })
}

This is another way i changed but not working

func TrelloWebhook(c *fiber.Ctx) error {

    secret := "****ea6308995"
    callbackURL := "https://*****ssum.ngrok-free.app/trello-webhook"

    base64Digest := func(s string) string {
        h := hmac.New(sha1.New, []byte(secret))
        h.Write([]byte(s))
        return base64.StdEncoding.EncodeToString(h.Sum(nil))
    }

    var request map[string]interface{}
    if err := json.Unmarshal(c.Body(), &request); err != nil {
        fmt.Println("Error decoding JSON:", err)
        return c.SendStatus(fiber.StatusBadRequest)
    }

    requestBody, err := json.Marshal(request)
    if err != nil {
        fmt.Println("Error encoding JSON:", err)
        return c.SendStatus(fiber.StatusInternalServerError)
    }

    content := string(requestBody) + callbackURL

    doubleHash := base64Digest(content)
    headerHash := c.Get("x-trello-webhook")

    fmt.Println("doubleHash : ", doubleHash)
    fmt.Println("headerHash : ", headerHash)

    // Your existing return statement
    return c.Status(200).JSON(&fiber.Map{
        "status":      true,
        "information": "customers-data_request!",
    })
}