Initial commit: AS4/411 directory and discovery service for Sankofa Marketplace

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/protocols/iso20022-as4-sample-envelope.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Anonymized AS4/ebMS3-style sample for ISO 20022 FI-to-FI.
+     References: OASIS ebMS 3.0, AS4. Payload is opaque (ISO 20022 XML).
+     Placeholders: SENDERBICXXX, RECEIVERBICXXX; endpoint resolved via directory. -->
+<Envelope xmlns="http://docs.oasis-open.org/ebxml-msg/ebms/v3.0/ns/core/200704/">
+  <Header>
+    <Messaging>
+      <UserMessage>
+        <MessageInfo>
+          <MessageId>uuid-sample-message-id-001</MessageId>
+          <Timestamp>2025-02-07T12:00:00Z</Timestamp>
+          <RefToMessageId>optional-ref</RefToMessageId>
+        </MessageInfo>
+        <PartyInfo>
+          <From>
+            <PartyId>SENDERBICXXX</PartyId>
+            <Role>http://example.org/roles/sender</Role>
+          </From>
+          <To>
+            <PartyId>RECEIVERBICXXX</PartyId>
+            <Role>http://example.org/roles/receiver</Role>
+          </To>
+        </PartyInfo>
+        <CollaborationInfo>
+          <AgreementRef>as4.fifi.iso20022.v1</AgreementRef>
+          <Service type="application">iso20022.fi</Service>
+          <Action>credit.transfer</Action>
+          <ConversationId>conv-sample-001</ConversationId>
+        </CollaborationInfo>
+        <PayloadInfo>
+          <PartInfo href="cid:pacs008.xml">
+            <Schema location="urn:iso:std:iso:20022:tech:xsd:pacs.008.001.08"/>
+          </PartInfo>
+        </PayloadInfo>
+      </UserMessage>
+    </Messaging>
+  </Header>
+  <!-- Body: multipart with signed+encrypted payload (omitted here; AS4 treats as opaque) -->
+</Envelope>