pub fn issue_key_rotation_statement(
stmt: &mut KeyRotationStatement,
old_priv: &HybridPrivateKey,
new_priv: &HybridPrivateKey,
)pub fn issue_key_rotation_statement(
stmt: &mut KeyRotationStatement,
old_priv: &HybridPrivateKey,
new_priv: &HybridPrivateKey,
)