feat(mobile): bind device identities and bound voice usage in 0.1.4 dev

apps/mobile/src/voice-usage.mjs

@@ -0,0 +1,87 @@
+// Paid-list-price estimate, not a quota lookup or an invoice. Sources checked
+// 2026-09-08: https://ai.google.dev/gemini-api/docs/pricing and /api/live.
+// Live prompt counts include history billed again on each generation request.
+export const VOICE_PRICING = Object.freeze({
+  model: 'gemini-3.1-flash-live-preview', checked: '2026-09-08',
+  input: Object.freeze({ TEXT: 0.75, AUDIO: 3, IMAGE: 1, VIDEO: 1 }),
+  output: Object.freeze({ TEXT: 4.5, AUDIO: 12 }),
+})
+export const DEFAULT_VOICE_LIMITS = Object.freeze({ minutes: 10, usd: 0.25 })
+
+export function voiceLimits(value = DEFAULT_VOICE_LIMITS) {
+  const minutes = Number(value.minutes), usd = Number(value.usd)
+  // Ephemeral credentials currently expire after ten minutes; don't offer a
+  // duration the connection cannot actually support.
+  if (!Number.isInteger(minutes) || minutes < 1 || minutes > 10 ||
+      !Number.isFinite(usd) || usd < 0.01 || usd > 10)
+    throw new Error('Ses sınırı 1–10 dakika ve 0,01–10 USD arasında olmalı.')
+  return { minutes, usd }
+}
+
+function count(value) {
+  if (value === undefined) return 0 // protobuf omits zero-valued fields
+  if (!Number.isSafeInteger(value) || value < 0) throw new Error('Geçersiz kullanım sayacı.')
+  return value
+}
+
+function modalityCost(total, details, rates) {
+  if (details !== undefined && !Array.isArray(details)) throw new Error('Geçersiz kullanım ayrıntısı.')
+  let tokens = 0, low = 0, high = 0, uncertain = false
+  const minimum = Math.min(...Object.values(rates)), maximum = Math.max(...Object.values(rates))
+  for (const detail of details || []) {
+    const n = count(detail?.tokenCount), rate = Object.hasOwn(rates, detail?.modality) ? rates[detail.modality] : undefined
+    tokens += n; low += n * (rate ?? minimum); high += n * (rate ?? maximum)
+    if (rate === undefined && n) uncertain = true
+  }
+  if (tokens > total) throw new Error('Kullanım toplamı ayrıntılarla uyuşmuyor.')
+  const remainder = total - tokens
+  return { low: low + remainder * minimum, high: high + remainder * maximum,
+    uncertain: uncertain || remainder > 0 }
+}
+
+export function estimateUsage(metadata, model) {
+  if (model !== VOICE_PRICING.model) throw new Error('Bu ses modelinin fiyatı doğrulanmadı.')
+  if (!metadata || typeof metadata !== 'object' || Array.isArray(metadata) ||
+      !['promptTokenCount', 'responseTokenCount', 'totalTokenCount'].some(k => k in metadata))
+    throw new Error('Google kullanım bilgisi eksik.')
+  const prompt = count(metadata.promptTokenCount), response = count(metadata.responseTokenCount)
+  const thoughts = count(metadata.thoughtsTokenCount), tools = count(metadata.toolUsePromptTokenCount)
+  const total = count(metadata.totalTokenCount)
+  if (metadata.totalTokenCount !== undefined && total < prompt + response)
+    throw new Error('Kullanım toplamı sayaçlarla uyuşmuyor.')
+  const input = modalityCost(prompt, metadata.promptTokensDetails, VOICE_PRICING.input)
+  const output = modalityCost(response, metadata.responseTokensDetails, VOICE_PRICING.output)
+  const tool = modalityCost(tools, metadata.toolUsePromptTokensDetails, VOICE_PRICING.input)
+  // Thinking/tool counters may overlap aggregate counts. Keep a range instead
+  // of promising a falsely precise bill or silently treating them as free.
+  const residual = Math.max(0, total - prompt - response)
+  const extraUpper = Math.max(residual * 12, thoughts * 4.5 + tool.high)
+  return { lowUsd: (input.low + output.low) / 1e6,
+    highUsd: (input.high + output.high + extraUpper) / 1e6,
+    uncertain: input.uncertain || output.uncertain || extraUpper > 0 || count(metadata.cachedContentTokenCount) > 0 }
+}
+
+export class VoiceUsage {
+  constructor(model, limits = DEFAULT_VOICE_LIMITS) {
+    this.model = model; this.limits = voiceLimits(limits)
+    this.lowUsd = 0; this.highUsd = 0; this.reports = 0; this.uncertain = false
+  }
+  add(metadata) {
+    // Do not de-duplicate equal reports: distinct requests can have equal
+    // token counts, and subtracting prior prompt counts loses history cost.
+    const cost = estimateUsage(metadata, this.model)
+    this.lowUsd += cost.lowUsd; this.highUsd += cost.highUsd
+    this.uncertain ||= cost.uncertain; this.reports++
+    return this.snapshot()
+  }
+  snapshot() {
+    return { lowUsd: this.lowUsd, highUsd: this.highUsd, reports: this.reports,
+      uncertain: this.uncertain, reached: this.highUsd >= this.limits.usd }
+  }
+}
+
+export function usageLabel(usage, seconds) {
+  const cost = !usage.reports ? 'Maliyet henüz bilinmiyor; Google kullanım bildirimi bekleniyor.' :
+    `Bildirilen kullanımın ücretli tarife tahmini: ${usage.lowUsd.toFixed(4)}–${usage.highUsd.toFixed(4)} USD${usage.uncertain ? ' (eksik ayrıntılar için aralık)' : ''}.`
+  return `Yerel süre: ${seconds} sn. ${cost} Gerçek fatura veya kalan ücretsiz kota değildir; IDE modeli dahil değildir.`
+}