Function ergo::ergo_lib_ergo_box_candidate_builder_mint_token

#[no_mangle]
pub unsafe extern "C" fn ergo_lib_ergo_box_candidate_builder_mint_token(
    builder_mut: ErgoBoxCandidateBuilderPtr,
    token_ptr: ConstTokenPtr,
    token_name: *const c_char,
    token_desc: *const c_char,
    num_decimals: usize
)

Mint token, as defined in https://github.com/ergoplatform/eips/blob/master/eip-0004.md token - token id(box id of the first input box in transaction) and token amount, token_name - token name (will be encoded in R4), token_desc - token description (will be encoded in R5), num_decimals - number of decimals (will be encoded in R6)