Constant cargo_credential::PROTOCOL_VERSION_1

pub const PROTOCOL_VERSION_1: u32 = 1;

Credential process JSON protocol version. If the protocol needs to make a breaking change, a new protocol version should be defined (PROTOCOL_VERSION_2). This library should offer support for both protocols if possible, by signaling in the CredentialHello message. Cargo will then choose which protocol to use, or it will error if there are no common protocol versions available.