From a605fcdfacf30b695516d9b99754d997b3bf8154 Mon Sep 17 00:00:00 2001
From: Tim Smyth <33017641+pulledtim@users.noreply.github.com>
Date: Wed, 31 Jan 2024 10:24:40 +0100
Subject: [PATCH] Impl hints

---
 doc/flows/service-interaction-m2m/README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/flows/service-interaction-m2m/README.md b/doc/flows/service-interaction-m2m/README.md
index 306c306..b9b47de 100644
--- a/doc/flows/service-interaction-m2m/README.md
+++ b/doc/flows/service-interaction-m2m/README.md
@@ -195,3 +195,6 @@ The implementation of the VCVerifier will return a JWT access token, containing
 in the request. This allows the PDP to extract all necessary information when performing the authorization steps during 
 interaction with the service.
 
+## Implementation hints
+### Encoding and Padding
+Token send to the token endpoint require a base64url encoding without padding as described in Appendice C of [RFC 7515](https://www.rfc-editor.org/rfc/rfc7515.txt).