futuapi4go

⚠️ Under Active Development
This SDK is under active development. While functional against real Futu OpenD instances, some proto response fields may still be unmapped. APIs and types may change between minor versions. Audit client/types.go against the Futu Proto Reference for your specific use case before relying on any field.

Go-native. Type-safe. Production-ready. The most complete and ergonomic Go SDK for Futu OpenAPI — market data, trading, and real-time push. All communication via Protocol Buffers over TCP.

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• 184 protobuf types covering every Futu OpenAPI service
• One-liner connect with automatic env config (NewClientFromEnv)
• Real-time push via channels or typed callbacks
• Fluent API: cli.Quote().GetBasicQot(), cli.Trade().PlaceOrder()
• Distributed tracing + metrics with OpenTelemetry (opt-in via pkg/tracing/otel)
• Connection state machine, graceful shutdown, and auto-reconnect
• Rate limiter, circuit breaker, and retry wired into every API call
• K-Line data cache (LRU + TTL), order pre-flight validation, audit logging
• Tag-triggered GitHub releases with changelog-derived notes

Table of Contents

• Install
• Quick Start
• Key Features
• Examples
• Package Map
• Common APIs
• Build & Test
• Architecture
• Troubleshooting
• Contributing
• License

Install

go get github.com/shing1211/futuapi4go@v0.20.0

Requires Go 1.26+ and a running Futu OpenD instance.

Quick Start

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/shing1211/futuapi4go/client"
	"github.com/shing1211/futuapi4go/pkg/constant"
	futuapi "github.com/shing1211/futuapi4go/pkg/futuapi"
)

func main() {
	// One-call connect (reads env: FUTU_OPEND_ADDR, FUTU_RSA_PUBLIC_KEY, ...)
	cli, err := futuapi.NewClientFromEnv()
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	ctx := context.Background()
	quote, err := client.GetQuote(ctx, cli, constant.Market_HK, "00700")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%s: price=%.2f high=%.2f low=%.2f vol=%d\n",
		quote.Symbol, quote.Price, quote.High, quote.Low, quote.Volume)
}

Note: US stocks require subscribing before GetQuote works. HK stocks do not.

Key Features

Real-Time Push

Stop polling — receive data as it arrives. Two delivery models:

// Option 1: Channels (streaming)
ch := make(chan *push.UpdateBasicQot, 100)
stop, _ := chanpkg.SubscribeQuote(ctx, cli, constant.Market_HK, "00700", ch)
defer stop()
for q := range ch {
	fmt.Printf("[%s] price=%.2f\n", q.Security.GetCode(), q.CurPrice)
}

// Option 2: Typed callbacks (chainable on client; each returns an error)
cli.OnQuote(func(q *client.PushQuote) error {
	fmt.Printf("[%s] price=%.2f\n", q.Code, q.CurPrice)
	return nil
}).OnOrder(func(o *client.PushOrderUpdate) error {
	fmt.Printf("Order %s: status=%d\n", o.OrderIDEx, o.OrderStatus)
	return nil
})

Market Data

// One-shot
quote, _ := client.GetQuote(ctx, cli, constant.Market_HK, "00700")
snapshots, _ := client.GetSecuritySnapshot(ctx, cli, securities)

// Auto-paginated historical K-lines
klines, _ := client.RequestHistoryKL(ctx, cli, constant.Market_HK, "00700",
	constant.KLType_K_Day, "2024-01-01", "2025-01-01")

Trading

accounts, _ := client.GetAccountList(ctx, cli)
accID := accounts[0].AccID

client.UnlockTrading(ctx, cli, "md5_password")
result, _ := client.PlaceOrder(ctx, cli, accID,
	constant.TrdMarket_HK, "00700",
	constant.TrdSide_Buy, constant.OrderType_Normal, 350.0, 100,
	constant.TrdSecMarket_HK)

// Fluent order builder (Build returns the request and an error)
req, err := trd.NewOrder(accID, constant.TrdMarket_HK, constant.TrdEnv_Simulate).
	Buy("00700", 100).At(350.0).Build()

Warning: Never use retry.Do() with PlaceOrder, ModifyOrder, or CancelOrder. These operations are not idempotent — retrying may place duplicate orders. The SDK disables retry for trading operations by design (see pkg/retry).

Utilities

// Circuit breaker
cb := breaker.New(breaker.WithThreshold(5), breaker.WithCooldown(30*time.Second))
res, err := cb.Do(func() (interface{}, error) {
	return client.GetQuote(ctx, cli, constant.Market_HK, "00700")
})

// Structured logging (pkg/logger)
l := logger.New(logger.WithLevel(logger.LevelDebug))
l.Info("connected", "addr", "127.0.0.1:11111")

// Code helpers
mkt, code := util.ParseCode("HK.00700")  // market=1, code="00700"
s := util.FormatCode(mkt, code)          // "HK.00700"

Examples

For complete, runnable examples covering every API surface — including real-time push, trading workflows, historical data, and strategy patterns:

futuapi4go-demo →

Package Map

Package	Purpose
client	High-level wrappers — recommended entry point
pkg/qot	Market data: quotes, K-lines, order book, tick data...
pkg/trd	Trading: orders, positions, funds, history...
pkg/sys	System: global state, user info
pkg/push	Push notification parsers
pkg/push/chan	Channel-based real-time push delivery
pkg/breaker	Circuit breaker pattern
pkg/cache	K-Line data cache (LRU + TTL)
pkg/logger	Structured leveled logging
pkg/util	Code parsing (ParseCode, FormatCode), market helpers
pkg/constant	Typed constants with String() methods
pkg/degradation	Graceful degradation on connection loss
pkg/futuapi	Convenience re-export — NewClient(), NewClientFromEnv()
pkg/health	Health checks for OpenD liveness/readiness probes
pkg/history	Auto-paginated historical K-line downloads
pkg/market	Market hours, trading calendar, session detection
pkg/metrics	Client-side performance metrics collection
pkg/option	Options chain querying, code parsing, Greeks helpers
pkg/pb/*	184 protobuf types (v10.10.7008)
pkg/ratelimit	API rate limiting (token bucket per protoID)
pkg/retry	Configurable retry with exponential backoff
pkg/trd/audit.go	Trade audit logging
pkg/trd/validation.go	Order pre-flight validation
pkg/tracing	Core tracing interfaces (Tracer, Span, no-op default)
pkg/tracing/otel	OpenTelemetry-backed tracing adapter (opt-in)

Common APIs

Connection

// Manual config
cli := client.New(
	client.WithDialTimeout(10*time.Second),
	client.WithAPISetTimeout(30*time.Second),
).WithTradeEnv(constant.TrdEnv_Simulate)

// From env vars: FUTU_OPEND_ADDR, FUTU_RSA_PUBLIC_KEY, FUTU_ENCRYPT, FUTU_LOG_LEVEL
// (futuapi is github.com/shing1211/futuapi4go/pkg/futuapi)
cli, _ := futuapi.NewClientFromEnv()

cli.Connect("127.0.0.1:11111")
// cli.GetConnID(), cli.GetServerVer(), cli.IsEncrypt(), cli.GetLoginUserID()
// cli.CanSendProto(protoID)

Market Data

Function	Description
GetQuote(ctx, c, market, code)	Real-time quote
GetKLines(ctx, c, market, code, klType, num)	Latest K-line bars
GetOrderBook(ctx, c, market, code, num)	Bid/ask depth
GetTicker(ctx, c, market, code, num)	Tick-by-tick trades
GetStaticInfo(ctx, c, market, code)	Security name, type, lot size
GetSecuritySnapshot(ctx, c, securities)	Full snapshot for multiple securities
GetCapitalFlow(ctx, c, market, code)	Capital flow
RequestHistoryKL(ctx, c, market, code, klType, start, end)	Historical K-lines (auto-paginated)
GetHistoryKLQuota(ctx, c)	API quota usage

Trading

Function	Description
GetAccountList(ctx, c)	All trading accounts
UnlockTrading(ctx, c, pwdMD5)	Unlock trading
GetFunds(ctx, c, accID)	Account funds and power
PlaceOrder(ctx, c, accID, market, code, side, orderType, price, qty, secMarket)	Place order
ModifyOrder(ctx, c, accID, market, orderID, op, price, qty)	Modify or cancel order
GetOrderList(ctx, c, accID)	Active orders
GetPositionList(ctx, c, accID)	Current positions with P&L
GetHistoryOrderList(ctx, c, accID, market, start, end)	Historical orders
GetOrderFillList(ctx, c, accID)	Order fills

Subscriptions

Function	Description
Subscribe(ctx, c, market, code, []constant.SubType)	Subscribe to push types
Unsubscribe(ctx, c, market, code, []constant.SubType)	Unsubscribe
chanpkg.SubscribeQuote(ctx, cli, market, code, ch)	Quote push via channel
chanpkg.SubscribeKLine(ctx, cli, market, code, klType, ch)	Single K-line push via channel
chanpkg.SubscribeKLines(ctx, cli, market, code, []klTypes, ch)	Multi K-line push with filter
chanpkg.SubscribeTicker(ctx, cli, market, code, ch)	Ticker push via channel
chanpkg.SubscribeOrderBook(ctx, cli, market, code, ch)	Order book push via channel

Build & Test

make check          # gofmt -w + go vet + go build
make test           # go test -race ./...
make docs-check     # README-translation guard

# Integration tests (require a running OpenD)
FUTU_INTEGRATION_TESTS=1 go test -race ./test/integration/...

Architecture

Application
  └── client/Client         (public wrappers)
       └── pkg/*            (qot, trd, sys — business logic)
            └── internal/client/Client   (connection, reconnect)
                 └── internal/client/Conn  (TCP I/O, packet framing)
                      └── Futu OpenD (TCP socket)

All communication is via Protocol Buffers over TCP. See DESIGN.md for full architecture decisions and internal/testutil/mock for the mock OpenD server used in tests.

Troubleshooting

Error	Likely Cause
connection refused	OpenD not running. Check FUTU_OPEND_ADDR.
no data from GetQuote (US stocks)	Must call Subscribe first for US market. HK does not need it.
The packet body SHA1 signature is incorrect (very old OpenD)	Upgrade OpenD to v10.5+. The SDK uses SHA1(ciphertext) which OpenD accepts.
解析protobuf协议失败	Missing required C2S fields in request body.
模拟交易不支持	Feature not available in simulate mode; use WithTradeEnv(TrdEnv_Real).

Contributing

1. Fork the repository.
2. Create a feature branch (git checkout -b feat/my-change).
3. Ensure all existing tests pass: go test -race ./...
4. Add tests for any new functionality.
5. Run go vet ./... and fix any warnings.
6. Open a pull request.

See CHANGELOG.md for the version history and docs/IMPLEMENTATION_COMPLETE.md for API-coverage and phase status.

See Also

• Docs Index — every document and its status
• CHANGELOG — version history and release notes
• Version Map — which Futu OpenD protocol / proto count / clientVer each SDK release carries
• USAGE Guide — detailed setup, environment, and advanced patterns
• ARCHITECTURE — package layout, execution flows, concurrency
• Error Codes — error codes, categories, recovery hints
• DESIGN — design decisions, API patterns, security model
• Implementation status — API coverage and phase history
• futuapi4go-demo — runnable examples for every feature

License

Apache License 2.0 — see LICENSE.

Trading Disclaimer: Trading financial instruments carries significant risk. Always test thoroughly in simulate mode before using real funds.