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feat: considera caracteres alfanuméricos ao calcular digito verificado da chave de acesso #1687

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Merged
joaovictorjs merged 4 commits into from
Mar 25, 2026
Merged

feat: considera caracteres alfanuméricos ao calcular digito verificado da chave de acesso #1687

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ebfa907
feat: adiciona suporte a caracteres alfanumericos
joaovictorjs Mar 24, 2026
1f4e1f6
feat: adiciona suporte ao CNPJ alfanumérico
joaovictorjs Mar 24, 2026
d3dcfc7
test: cria testes para ObterChave e ObterValorDoCaractere
joaovictorjs Mar 24, 2026
1fd0a72
test: remove caso com cnpj alfanumérico minúsculo
joaovictorjs Mar 25, 2026
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16 changes: 14 additions & 2 deletions DFe.Utils/ChaveFiscal.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -95,8 +95,8 @@ private static string ObterDigitoVerificador(string chave)
//percorrendo cada caractere da chave da direita para esquerda para fazer os cálculos com o peso
for (var i = chave.Length - 1; i != -1; i--)
{
var ch = Convert.ToInt32(chave[i].ToString());
soma += ch*peso;
var valorCaractere = ObterValorDoCaractere(chave[i]);
soma += valorCaractere * peso;
//sempre que for 9 voltamos o peso a 2
if (peso < 9)
peso += 1;
Expand All @@ -115,6 +115,18 @@ private static string ObterDigitoVerificador(string chave)
return dv.ToString();
}

/// <summary>
/// Obtem o valor de um caractere
/// </summary>
/// <param name="caractere"></param>
/// <returns></returns>
private static int ObterValorDoCaractere(char caractere)
{
const int zeroASCII = 48;
var valor = caractere - zeroASCII;
return valor;
}

/// <summary>
/// Informa se a chave de um DF-e é válida
/// </summary>
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