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Forex: convert to/from crypto via CoinGecko (keyless)

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Wire a curated set of crypto assets (BTC, ETH, SOL, XRP, DOGE, ADA, LTC)
into the !fx conversion path only. fxLivePairRate now resolves each side
to units-per-USD and crosses them, so USD/fiat/crypto mix uniformly; fiat
sides still batch into one Frankfurter call, crypto hits CoinGecko's
keyless simple/price with a 60s cache.

Analysis (rate/report/setalert) stays fiat-only on purpose -- a daily
snapshot buy-signal/52w range is meaningless for 24/7 crypto.
This commit is contained in:
prosolis
2026-05-21 18:05:37 -07:00
parent 6cda1cac38
commit 72f4ef3b27
4 changed files with 200 additions and 37 deletions
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31
internal/plugin/forex_convert.go
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@@ -58,7 +58,7 @@ func fxParseConvert(args []string) (amount float64, base, quote string, err erro
for _, tok := range tokens {
// Pair form: USD/EUR
if strings.ContainsAny(tok, "/|-") {
pair := fxParsePair([]string{tok})
pair := fxParsePair([]string{tok}, true)
if pair != nil {
if base != "" {
return 0, "", "", fmt.Errorf("multiple currency pairs")
@@ -76,9 +76,9 @@ func fxParseConvert(args []string) (amount float64, base, quote string, err erro
amountSet = true
continue
}
// Currency code?
// Currency or crypto code?
up := strings.ToUpper(tok)
if fxIsSupported(up) {
if fxIsConvertible(up) {
currencies = append(currencies, up)
continue
}
@@ -127,12 +127,15 @@ func (p *ForexPlugin) cmdConvert(ctx MessageContext, args []string) error {
return p.SendReply(ctx.RoomID, ctx.EventID, msg)
}
// fxEmoji returns the flag emoji for a supported currency, falling back
// to USD's flag.
// fxEmoji returns the flag/symbol emoji for a supported currency or crypto
// asset, falling back to USD's flag.
func fxEmoji(cur string) string {
if m, ok := fxMeta[cur]; ok && m.Emoji != "" {
return m.Emoji
}
if c, ok := fxCryptoMeta[strings.ToUpper(cur)]; ok && c.Emoji != "" {
return c.Emoji
}
if cur == "USD" {
return "🇺🇸"
}
@@ -140,9 +143,13 @@ func fxEmoji(cur string) string {
}
// fxFormatAmount formats a converted amount with thousands separators.
// JPY uses 0 decimal places (yen are not subdivided in practice for display),
// other currencies use 2.
// Crypto uses up to 8 decimals (trailing zeros trimmed) since amounts are
// often fractional; JPY uses 0 (yen are not subdivided in practice for
// display); other currencies use 2.
func fxFormatAmount(currency string, amount float64) string {
if fxIsCrypto(currency) {
return fxTrimZeros(fxAddCommas(amount, 8))
}
decimals := 2
if currency == "JPY" {
decimals = 0
@@ -150,6 +157,16 @@ func fxFormatAmount(currency string, amount float64) string {
return fxAddCommas(amount, decimals)
}
// fxTrimZeros drops trailing fractional zeros (and a bare trailing dot) from a
// formatted decimal string, leaving integers untouched.
func fxTrimZeros(s string) string {
if !strings.Contains(s, ".") {
return s
}
s = strings.TrimRight(s, "0")
return strings.TrimRight(s, ".")
}
// fxAddCommas formats a float with N decimal places and thousands separators.
func fxAddCommas(v float64, decimals int) string {
s := strconv.FormatFloat(v, 'f', decimals, 64)