@spec validate(String.t()) :: {:ok, String.t()} | {:error, String.t()}

Validates reference string.

Rules

• Maximum 35 characters
• Any alphanumeric characters and common separators allowed

Examples

iex> QRNBU.Validators.Reference.validate("INV-12345")
{:ok, "INV-12345"}

iex> QRNBU.Validators.Reference.validate("")
{:error, "Reference cannot be empty"}

iex> QRNBU.Validators.Reference.validate(String.duplicate("A", 36))
{:error, "Reference must not exceed 35 characters"}