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Validação chave de acesso (digito verificador) - Nota Fiscal. Função criada a partir do script PHP: https://www.codigofonte.com.br/codigos/aprenda-a-calcular-o-digito-verificador-da-chave-de-nfe
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const isValid = chaveAcesso => { | |
if (!chaveAcesso || chaveAcesso.trim().length !== 44) { | |
return false | |
} | |
const chaveParcial = chaveAcesso.substring(0, 43) | |
const multiplicadores = [2, 3, 4, 5, 6, 7, 8, 9] | |
let i = 42 | |
let somaPonderada = 0 | |
while (i >= 0) { | |
for (let j = 0; (j < multiplicadores.length && i >= 0); j++) { | |
somaPonderada += chaveParcial[i] * multiplicadores[j] | |
i -= 1 | |
} | |
} | |
const resto = somaPonderada % 11 | |
const dv = (resto === 0 || resto === 1) ? 0 : 11 - resto | |
return String(dv) === chaveAcesso.substring(43, 44) | |
} | |
// Example | |
console.log(isValid('CHAVE_DE_ACESSO_COM_44_CARACTERES')) |
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