Interoperability on the third-party libraries

[FabioPinheiro]

Currently, this mediator needs to have the hard-coded bytes inside of the encoded message.
"typ" : "application/didcomm-plain+json"

typ is not part of the specification.

This requirement comes from the Did Comm library implementation sicpa-dlab/didcomm-python#93

[rodolfomiranda]

typ is the IANA media type. It's described on the spec here. It reads:
"this spec recommends the JOSE convention of using typ to make JOSE structure formats self-describing. This is particularly helpful in the outermost envelope of any DIDComm message, before unwrapping begins."
Probable all sicpa libraries are implemented with that recommendation since we tested with the JVM and Rust and have not seen that error.

[FabioPinheiro]

On the outermost envelope, I have "typ":"application/didcomm-encrypted+json"

{
"ciphertext":"...",
"protected":"eyJlcGsiOnsia3R5IjoiT0tQIiwiY3J2IjoiWDI1NTE5IiwieCI6IndtSU90Sm03MVUwTGI3NDJqYThudFo1NjlGWDlqRjlBVVJ0cm1WYTluU28ifSwiYXB2IjoiLWNOQ3l0eFVrSHpSRE5SckV2Vm05S0VmZzhZcUtQVnVVcVg1a0VLbU9yMCIsInR5cCI6ImFwcGxpY2F0aW9uL2RpZGNvbW0tZW5jcnlwdGVkK2pzb24iLCJlbmMiOiJBMjU2Q0JDLUhTNTEyIiwiYWxnIjoiRUNESC1FUytBMjU2S1cifQ",
"recipients":[{...}],
"tag":"...",
"iv":"..."
}

{"epk":{"kty":"OKP","crv":"X25519","x":"wmIOtJm71U0Lb742ja8ntZ569FX9jF9AURtrmVa9nSo"},"apv":"-cNCytxUkHzRDNRrEvVm9KEfg8YqKPVuUqX5kEKmOr0","typ":"application/didcomm-encrypted+json","enc":"A256CBC-HS512","alg":"ECDH-ES+A256KW"}

But for what I understood from the code of sicpa-dlab/didcomm-python. It requires that field to be hard coded on the content (from ciphertext).

[rodolfomiranda]

I see. And they are actually harcoding it d["typ"] = DIDCommMessageTypes.PLAINTEXT.value

[FabioPinheiro]

There is already a fix. (just need to be released)

[FabioPinheiro]

There is still no new release. I tried to open an issue asking for it
sicpa-dlab/didcomm-python#102

[FabioPinheiro]

I think this was fixed on version "0.3.2".
Let's update the requirements.txt to mention that version and close this.