mirror of
https://github.com/prosolis/gogobee.git
synced 2026-07-15 08:32:41 +00:00
95e0995c7f
- forex_crypto.go: cap the CoinGecko response with io.LimitReader(64KiB); build the simple/price query via url.Values instead of bare Sprintf. - dnd_expedition_camp.go: a combat-session lookup error now fails open (allow camp) + logs a warning, instead of blocking standard camp with a misleading empty 'not cleared' rejection.
125 lines
3.3 KiB
Go
125 lines
3.3 KiB
Go
package plugin
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strings"
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"sync"
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"time"
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)
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// ── Crypto support (CoinGecko, keyless) ──────────────────────────────────────
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//
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// CoinGecko's public simple/price endpoint needs no API key and no usage tier,
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// matching Frankfurter's keyless model. Crypto is wired into the *conversion*
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// path only (`!fx 100 USD to BTC`). The rate/report/alert analysis stays
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// fiat-only on purpose: a daily-snapshot "buy signal" or 52-week range is
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// meaningless for 24/7 crypto markets.
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type fxCryptoInfo struct {
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CoinGeckoID string
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Emoji string
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Label string
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}
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// fxCryptoMeta maps a ticker to its CoinGecko coin ID and display metadata.
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// Add a row here to support another asset.
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var fxCryptoMeta = map[string]fxCryptoInfo{
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"BTC": {"bitcoin", "₿", "Bitcoin"},
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"ETH": {"ethereum", "Ξ", "Ethereum"},
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"SOL": {"solana", "◎", "Solana"},
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"XRP": {"ripple", "✕", "XRP"},
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"DOGE": {"dogecoin", "🐕", "Dogecoin"},
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"ADA": {"cardano", "₳", "Cardano"},
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"LTC": {"litecoin", "Ł", "Litecoin"},
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}
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// fxIsCrypto reports whether sym is a supported crypto asset.
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func fxIsCrypto(sym string) bool {
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_, ok := fxCryptoMeta[strings.ToUpper(sym)]
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return ok
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}
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// fxIsConvertible reports whether a symbol can appear in a conversion —
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// USD, a tracked fiat currency, or a supported crypto asset.
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func fxIsConvertible(cur string) bool {
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return fxIsSupported(cur) || fxIsCrypto(cur)
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}
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const coinGeckoBaseURL = "https://api.coingecko.com/api/v3"
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// Short-TTL price cache to stay well under CoinGecko's public rate limit and
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// keep repeated conversions snappy.
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const cgCacheTTL = 60 * time.Second
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var (
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cgMu sync.Mutex
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cgCache = map[string]cgCacheEntry{}
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)
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type cgCacheEntry struct {
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priceUSD float64
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at time.Time
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}
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// cgSpotUSD returns the USD spot price for one unit of the given crypto symbol.
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func (p *ForexPlugin) cgSpotUSD(sym string) (float64, error) {
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sym = strings.ToUpper(sym)
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info, ok := fxCryptoMeta[sym]
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if !ok {
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return 0, fmt.Errorf("unsupported crypto %s", sym)
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}
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cgMu.Lock()
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if e, ok := cgCache[sym]; ok && time.Since(e.at) < cgCacheTTL {
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cgMu.Unlock()
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return e.priceUSD, nil
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}
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cgMu.Unlock()
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ctx, cancel := context.WithTimeout(context.Background(), 8*time.Second)
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defer cancel()
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q := url.Values{}
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q.Set("ids", info.CoinGeckoID)
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q.Set("vs_currencies", "usd")
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reqURL := coinGeckoBaseURL + "/simple/price?" + q.Encode()
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req, err := http.NewRequestWithContext(ctx, "GET", reqURL, nil)
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if err != nil {
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return 0, err
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}
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resp, err := p.httpClient.Do(req)
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if err != nil {
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return 0, fmt.Errorf("coingecko API error: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return 0, fmt.Errorf("coingecko API returned %d", resp.StatusCode)
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}
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var data map[string]map[string]float64
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if err := json.NewDecoder(io.LimitReader(resp.Body, 64<<10)).Decode(&data); err != nil {
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return 0, fmt.Errorf("coingecko decode error: %w", err)
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}
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entry, ok := data[info.CoinGeckoID]
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if !ok {
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return 0, fmt.Errorf("no price for %s", sym)
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}
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price, ok := entry["usd"]
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if !ok || price <= 0 {
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return 0, fmt.Errorf("invalid price for %s", sym)
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}
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cgMu.Lock()
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cgCache[sym] = cgCacheEntry{priceUSD: price, at: time.Now()}
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cgMu.Unlock()
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return price, nil
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}
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