Text-based stamps with async_sign

[inui-sdt2]

Dear @MatthiasValvekens
Is there any way to generate signature appearance(Text-based stamps etc,) with async_sign_pdf?

[MatthiasValvekens]

Hi @inui-sdt2,

The function async_sign_pdf in pyhanko.sign.signers.functions doesn't take any styling parameters, but that function is actually just a very thin wrapper around the async_sign_pdf method of the pyhanko.sign.signers.pdf_signer.PdfSigner class:

pyHanko/pyhanko/sign/signers/functions.py

Lines 129 to 136 in c5e2e6f

	signer = PdfSigner(
	signature_meta, signer, timestamper=timestamper,
	new_field_spec=new_field_spec
	)
	return await signer.async_sign_pdf(
	pdf_out, existing_fields_only=existing_fields_only,
	bytes_reserved=bytes_reserved, in_place=in_place, output=output
	)

.

If you instantiate your own PdfSigner, then you can pass in a stamp_style of your choosing. There's an example in the documentation showing how to do that---the example uses sign_pdf instead of async_sign_pdf, but as far as applying stamp styles goes, they're entirely analogous.