Cannot send picture from Base64

[gekkedev]

Description

Images cannot be sent as picture As reference image, I'm taking a screenshot:

const picture = await client.takeScreenshot()
console.log(picture) //logs valid and displayable base64
console.log(
  JSON.stringify(
    await client.sendImageFromBase64(message.chatId, picture, "Screenshot_20240627-153045_WhatsApp.jpg")
    //error:    [session:client] [object Object]
  )
)

console.log(
  JSON.stringify(
    await client.sendFileFromBase64(message.chatId, picture, "Screenshot_20240627-153045_WhatsApp.jpg")
    //[session:client] Error: Empty or invalid file or base64
  )
)

Environment

• WPPConnect version(s): 1.32.3
• WA-JS version(s): 3.4.1
• Browser: Chrome @ latest
• OS: Windows 11
• Node version: Node 18
• WhatsApp version: 2.3000.1013991265
• MultiDevice (BETA): no

Steps to Reproduce

1. use this code
2. send a message
3. try the file-sending method, same issue but a more detailed error

Log Output

sendImageFromBase64:

error:    [session:client] [object Object]

wrapping this in a try/catch structure yields this:

{ erro: true, to: '123456***90@c.us', text: 'Invalid base64!' }

sendFileFromBase64:

[session:client] Error: Empty or invalid file or base64

Additional context / Screenshot

did not try it with other pictures yet, so there could be an issue with the screenshot creation function's output (although it is displayable)

[gekkedev]

Apparently, the function expects not just base64, but a data URI.

wppconnect/src/api/helpers/base64-mimetype.ts

Line 24 in 1358053

const mime = encoded.match(/data:([a-zA-Z0-9]+\/[a-zA-Z0-9-.+]+).*,.*/);

Prefixing "data:image/png;base64," to the screenshot works. IMHO, it would be better to prefix it automatically and verify the actual image, or not at all. I'll create a PR to update the documentation and describe the workaround in the JSDoc here:

wppconnect/src/api/layers/sender.layer.ts

Line 224 in 1358053

return await this.sendImageFromBase64(