pub unsafe extern "C" fn TRUST_TOKEN_ISSUER_issue(
ctx: *const TRUST_TOKEN_ISSUER,
out: *mut *mut u8,
out_len: *mut usize,
out_tokens_issued: *mut usize,
request: *const u8,
request_len: usize,
public_metadata: u32,
private_metadata: u8,
max_issuance: usize,
) -> c_int