SAP S/4 HANA Integration with emSigner Using BTP

Looking for a S/4 HANA integration with Digital Signature Platform - emSigner using BTP & CPI. The Invoice document to be pushed to emSigner using REST API and get the signed document back to S/4 HANA Two integration approaches 1) Remote Signing-Automated signing using REST API 2) Embedded Signing - Redirection to emSigner platform from S/4HANA using REST API.