A simple sample of signed CWT.

python_cwt_sample_01.py

import cwt
from cwt import COSEKey

# The sender side:
private_key = COSEKey.from_jwk({
    "kid": "01",
    "kty": "OKP",
    "key_ops": ["sign"],
    "alg": "EdDSA",
    "crv": "Ed25519",
    "x": "2E6dX83gqD_D0eAmqnaHe1TC1xuld6iAKXfw2OVATr0",
    "d": "L8JS08VsFZoZxGa9JvzYmCWOwg7zaKcei3KZmYsj7dc",
})
token = cwt.encode({"iss": "coaps://as.example", "sub": "dajiaji", "cti": "123"}, private_key)

# The recipient side:
public_key = COSEKey.from_jwk({
    "kid": "01",
    "kty": "OKP",
    "key_ops": ["verify"],
    "crv": "Ed25519",
    "x": "2E6dX83gqD_D0eAmqnaHe1TC1xuld6iAKXfw2OVATr0",
})
decoded = cwt.decode(token, public_key)