Portfólio
pix
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Portfólio
Portfólio
Jul 28, 2026
The QR Code That Didn't Pay — String.fromCharCode, Control Codepoints, and an Invisible Pix
I added Pix to my portfolio with BR Code generation. Only the QR Code didn't work in any banking app. The culprit: String.fromCharCode generating control characters instead of decimal digits in EMV 2022 length fields.
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Portfólio
Jul 28, 2026
Portfolio — the July audit that turned into spring cleaning
July 2026 was the month my portfolio stopped getting new features and started fixing the ones it already had. A deep audit revealed 10 problems — from Pix to focus trap — and by the end, deployment was more automated than ever.
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Portfólio
Jul 28, 2026
O Pix que não Pixava — String.fromCharCode, codepoints de controle e um BR Code invisível
Implementei Pix no portfólio com pagamento via BR Code. Só que o QR Code não funcionava em nenhum app de banco. O culpado: String.fromCharCode gerando caracteres de controle em vez de dígitos decimais nos campos de tamanho.
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Portfólio
Jul 28, 2026
Portfolio — a auditoria que virou faxina de julho
Julho de 2026 foi o mês em que o portfólio parou de ganhar features novas e começou a corrigir as que já tinha. Uma auditoria profunda revelou 10 problemas — do Pix ao focus trap — e no fim o deploy ficou mais automático do que nunca.
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