Replace ecdsa with cryptography for key generation and signing #221

Author: swlodarski-sumoheavy

Pipfile

@@ -4,7 +4,7 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-ecdsa = "==0.19.1"
+cryptography = ">=44.0.0"
 requests = "==2.32.5"
 pydantic = "==2.12.5"