Day 2: Invalid Base64 Encoding or Empty XML Error #irbapi #base64error

SEO Title: Day 2: Invalid Base64 Encoding or Empty XML Error #irbapi #base64error
Focus Keyphrase: IRB base64 invoice error
Meta Description: Solve the IRB e-invoice API error caused by invalid base64-encoded XML or empty content. Ensure proper encoding and UTF-8 headers in Laravel.

Table of Contents

IRBM API Error: Invalid Base64 or Missing XML

When submitting invoices to IRBM, you may encounter this vague but common response:


{
  "error": "Invalid payload",
  "details": "Invoice XML is not properly base64 encoded or is empty"
}

What This Error Means

IRBM expects:

Your XML to be UTF-8 encoded
The entire XML document to be base64-encoded
The result passed in the invoice field of your POST request

Common Mistake

Submitting raw XML instead of base64:


// ❌ WRONG: sending XML directly
'body' => [
  'invoice' => $signedXml
]

Correct Laravel Implementation


// Ensure UTF-8 and base64 encoding
$encodedXml = base64_encode(mb_convert_encoding($signedXml, 'UTF-8', 'auto'));

$response = Http::withToken($accessToken)->post(
  'https://preprod-api.myinvois.hasil.gov.my/api/v1.0/invoices',
  ['invoice' => $encodedXml]
);

Extra Debug Tips

✅ Always use DOMDocument::saveXML() — not string concatenation
✅ Confirm XML starts with
✅ Log strlen($encodedXml) — if it’s too small (e.g. 10–20 bytes), something’s wrong

How to Simulate This Error

You can simulate this error by:

Forgetting to sign the XML (empty document)
Accidentally trimming the output
Encoding an empty string: base64_encode('')

Coming Up in Day 3

We’ll cover the IRBM error: “Digest Mismatch (DS322)” — the nightmare caused by canonicalization or transform issues.

Tags: #IRBIntegration #Base64Error #LaravelEInvoice #EncodingIssue #UBLXML

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