Function btck_precomputed_transaction_data_copy 

pub unsafe extern "C" fn btck_precomputed_transaction_data_copy(
    precomputed_txdata: *const btck_PrecomputedTransactionData,
) -> *mut btck_PrecomputedTransactionData

@brief Copy precomputed transaction data.

@param[in] precomputed_txdata Non-null. @return The copied precomputed transaction data.