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|
|
|
|
|
|
|
| const ANU_PROXY = 'https://api.allorigins.win/raw?url=' +
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| encodeURIComponent('https://qrng.anu.edu.au/API/jsonI.php?length=64&type=hex16')
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|
|
| let _cache = [], _fetching = false, _source = 'INITIALIZING'
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|
|
| async function fetchANU() {
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| try {
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| const res = await fetch(ANU_PROXY, { signal: AbortSignal.timeout(8000) })
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| if (!res.ok) throw new Error(`HTTP ${res.status}`)
|
| const text = await res.text()
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| const json = JSON.parse(text)
|
| if (!json.success || !json.data) throw new Error('bad response')
|
| _source = 'ANU_QRNG'
|
| return json.data.map(h => parseInt(h, 16))
|
| } catch {
|
| _source = 'CSPRNG_FALLBACK'
|
| return Array.from({ length: 64 }, () => {
|
| const a = new Uint16Array(1); crypto.getRandomValues(a); return a[0]
|
| })
|
| }
|
| }
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|
|
| async function refill() {
|
| if (_fetching) return
|
| _fetching = true
|
| try { _cache.push(...await fetchANU()) } finally { _fetching = false }
|
| }
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|
|
| export async function getQuantumSamples(n = 64) {
|
| if (_cache.length < n) await refill()
|
| const out = _cache.splice(0, n)
|
| if (_cache.length < 32) refill().catch(() => {})
|
| return out
|
| }
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|
|
| export function getSource() { return _source }
|
|
|
| refill().catch(() => {})
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|
|
