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LongPort OpenAPI SDK for C

longport provides an easy-to-use interface for invokes LongPort OpenAPI.

Quickstart

Install LongPort OpenAPI SDK

Download C SDK

Setting environment variables(MacOS/Linux)

export LONGPORT_APP_KEY="App Key get from user center"
export LONGPORT_APP_SECRET="App Secret get from user center"
export LONGPORT_ACCESS_TOKEN="Access Token get from user center"

Setting environment variables(Windows)

setx LONGPORT_APP_KEY "App Key get from user center"
setx LONGPORT_APP_SECRET "App Secret get from user center"
setx LONGPORT_ACCESS_TOKEN "Access Token get from user center"

Quote API (Get basic information of securities)

#include <longport.h>
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#else
#include <curses.h>
#endif

void
on_quote(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to get quote: %s\n", lb_error_message(res->error));
    return;
  }

  lb_security_quote_t* data = (lb_security_quote_t*)res->data;
  fop(int i = 0; i < res->length; i++)
  {
    const lb_security_quote_t* quote = &data[i];
    printf("%s timestamp=%ld last_done=%f open=%f high=%f low=%f volume=%ld "
           "turnover=%f\n",
           quote->symbol,
           quote->timestamp,
           lb_decimal_to_double(quote->last_done),
           lb_decimal_to_double(quote->open),
           lb_decimal_to_double(quote->high),
           lb_decimal_to_double(quote->low),
           quote->volume,
           lb_decimal_to_double(quote->turnover));
  }
}

void
on_quote_context_created(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to create quote context: %s\n",
           lb_error_message(res->error));
    return;
  }

  *((const lb_quote_context_t**)res->userdata) = res->ctx;

  const char* symbols[] = { "700.HK", "AAPL.US", "TSLA.US", "NFLX.US" };
  lb_quote_context_quote(res->ctx, symbols, on_quote, NULL);
}

int
main(int argc, char const* argv[])
{
#ifdef WIN32
  SetConsoleOutputCP(CP_UTF8);
#endif

  lb_error_t* err = NULL;
  lb_config_t* config = lb_config_from_env(&err);
  if (err) {
    printf("failed to load configuration from environment: %s\n",
           lb_error_message(err));
    lb_error_free(err);
    return -1;
  }

  const lb_quote_context_t* ctx = NULL;
  lb_quote_context_new(config, on_quote_context_created, &ctx);
  getchar();
  lb_quote_context_release(ctx);
  return 0;
}

Quote API (Subscribe quotes)

#include <longport.h>
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#else
#include <curses.h>
#endif

void
on_quote(const struct lb_quote_context_t* ctx,
         const struct lb_push_quote_t* quote,
         void* userdata)
{
  printf("%s timestamp=%ld last_done=%f open=%f high=%f low=%f volume=%ld "
         "turnover=%f\n",
         quote->symbol,
         quote->timestamp,
         lb_decimal_to_double(quote->last_done),
         lb_decimal_to_double(quote->open),
         lb_decimal_to_double(quote->high),
         lb_decimal_to_double(quote->low),
         quote->volume,
         lb_decimal_to_double(quote->turnover));
}

void
on_subscrbe(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to subscribe quote: %s\n", lb_error_message(res->error));
    return;
  }
}

void
on_quote_context_created(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to create quote context: %s\n",
           lb_error_message(res->error));
    return;
  }

  *((const lb_quote_context_t**)res->userdata) = res->ctx;
  lb_quote_context_set_on_quote(res->ctx, on_quote, NULL, NULL);

  const char* symbols[] = { "700.HK", "AAPL.US", "TSLA.US", "NFLX.US" };
  lb_quote_context_subscribe(
    res->ctx, symbols, 4, LB_SUBFLAGS_QUOTE, true, on_subscrbe, NULL);
}

int
main(int argc, char const* argv[])
{
#ifdef WIN32
  SetConsoleOutputCP(CP_UTF8);
#endif

  lb_error_t* err = NULL;
  lb_config_t* config = lb_config_from_env(&err);
  if (err) {
    printf("failed to load configuration from environment: %s\n",
           lb_error_message(err));
    lb_error_free(err);
    return -1;
  }

  const lb_quote_context_t* ctx = NULL;
  lb_quote_context_new(config, on_quote_context_created, &ctx);
  getchar();
  lb_quote_context_release(ctx);
  return 0;
}

Trade API (Submit order)

#include <longport.h>
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#else
#include <curses.h>
#endif

void
on_submit_order(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to submit order: %s\n", lb_error_message(res->error));
    return;
  }

  const lb_submit_order_response_t* resp = res->data;
  printf("order id: %s\n", resp->order_id);
}

void
on_trade_context_created(const struct lb_async_result_t* res)
{
  if (res->error) {
    printf("failed to create trade context: %s\n",
           lb_error_message(res->error));
    return;
  }

  *((const lb_quote_context_t**)res->userdata) = res->ctx;

  lb_decimal_t* submitted_price = lb_decimal_from_double(50.0);
  lb_submit_order_options_t opts = {
    "700.HK", OrderTypeLO, OrderSideBuy, 200,  TimeInForceDay, submitted_price,
    NULL,     NULL,        NULL,         NULL, NULL,           NULL,
    NULL,
  };
  lb_decimal_free(submitted_price);
  lb_trade_context_submit_order(res->ctx, &opts, on_submit_order, NULL);
}

int
main(int argc, char const* argv[])
{
#ifdef WIN32
  SetConsoleOutputCP(CP_UTF8);
#endif

  lb_error_t* err = NULL;
  lb_config_t* config = lb_config_from_env(&err);
  if (err) {
    printf("failed to load configuration from environment: %s\n",
           lb_error_message(err));
    lb_error_free(err);
    return -1;
  }

  const lb_trade_context_t* ctx = NULL;
  lb_trade_context_new(config, on_trade_context_created, (void*)&ctx);
  getchar();
  lb_trade_context_release(ctx);
  return 0;
}

License

Licensed under either of