- Update InvoiceRequest notification_url definition to use SHOULD instead of MAY
- Capitalize MUST, SHOULD, etc.
- Update InvoiceRequest Message Creation steps to specifically define behavior for empty amount or amount out of bounds
- Add implementation section with references to Addressimo reference Store & Forward server and a client implementation in functest_ir.py
- Add flow diagrams for BIP70 extension and moble-to-mobile example with store and forward service
- Update InvoiceRequest to include nonce
- Remove ephemeral_public_key from ReturnPaymentRequest
- Update message validation and nonce usage in processes
- Make Abstract more readable
- Update Sender definition and acronym descriptions
- Added comments to ReturnPaymentRequest definition
- Bold ECDH and AES Setup notes and added "(see below)" for reference
- Removed Requestor/Responder definitions
- Seperated ECDH secret point generation and AES-256 (CBC Mode) setup from individual steps (listed twice) and created it's own section
- Added InvoiceRequest Validation section
