Develop and integrate electronic invoicing module for ERPNEXT according to SRI regulations for Ecuador.

The type of identification must be added in ERPNEXT for its use
RUC: numeric only, length allowed 13 characters. e.g. 0101140861001.
CEDULA: numeric only, length allowed 10 characters with default hyphen before the last number. e.g. 010114086-1.
PASSPORT: numeric only, length allowed 10 characters.
Enter and configure the certificate in P12 or Token format for authorization in ERPNEXT.
Generate XML from ERPNEXT invoice with the appropriate format and fields according to SRI requirements.
Send the signed XML to the SRI Web Services to answer with the authorization or rejection of the voucher.
Store the XML and PDF of the generated and signed invoices for later consultation and/or forwarding.
The RIDE must be generated in PDF format.
The authorization query of the voucher must be allowed.
Send by email to the client the invoice previously generated and signed in XML and PDF formats (setting to be configured in the issuer's email).
Integrate fully with the necessary modules in ERPNEXT.
Must integrate with ERPNEXT POS to generate electronic invoices issued.
Must have a block authorization option.
Deliver the module and documented code with installation instructions in ERPNEXT.
-Documents to be issued electronically:
- Invoices
- Credit notes
- Debit notes
- Withholding receipts
- Remittance guides
- Purchase of goods and rendering of services statements.