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feat(checkout): read sol_price_usd from payment object (closes #1 widget portion) #5

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feat(checkout): read sol_price_usd from payment object (closes #1 widget portion) #5

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b2bc8e3
feat(types): add optional sol_price_usd to Payment
relayhop May 3, 2026
082e2c0
feat(checkout): read sol_price_usd from payment, fallback to /api/pri…
relayhop May 3, 2026
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14 changes: 11 additions & 3 deletions src/CheckoutModal.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -379,7 +379,7 @@ function CheckoutModal({
}) {
const [tab, setTab] = useState<'wallet' | 'qr'>('wallet')
const [copied, setCopied] = useState(false)
const [solPrice, setSolPrice] = useState<number>(165)
const [solPrice, setSolPrice] = useState<number | null>(null)
const [selectedToken, setSelectedToken] = useState<Token>('SOL')
const { payment, error } = usePaymentStatus(paymentId, config)
const { display: timerDisplay } = useCountdown(payment?.expires_at ?? null)
Expand All @@ -388,15 +388,23 @@ function CheckoutModal({
const isProcessing = ['detected', 'swapping'].includes(payment?.status ?? '')
const showActions = !isTerminal && !isProcessing

// Prefer the price the backend already attached to the payment object
// (no extra HTTP roundtrip, and matches the price used at payment creation).
// Fall back to GET /api/price/sol once for backends that don't yet return it.
useEffect(() => {
if (payment?.sol_price_usd && payment.sol_price_usd > 0) {
setSolPrice(payment.sol_price_usd)
return
}
if (solPrice != null) return
fetch(`${config.apiUrl}/api/price/sol`, { headers: { 'x-api-key': config.apiKey } })
.then(r => r.json())
.then(d => { if (d.sol_usd) setSolPrice(d.sol_usd) })
.catch(() => { })
}, [])
}, [payment?.sol_price_usd])

const amountUsdc = payment ? Number(payment.amount_usdc) : 0
const amountSol = amountUsdc / solPrice
const amountSol = solPrice && solPrice > 0 ? amountUsdc / solPrice : 0

const copyAddress = () => {
if (!payment?.deposit_address) return
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6 changes: 6 additions & 0 deletions src/types.ts
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Expand Up @@ -16,6 +16,12 @@ export interface Payment {
status: PaymentStatus
expires_at: string
created_at: string
/**
* Live SOL/USD price the backend used at the time this payment object
* was returned. Cached server-side (30s TTL). Optional for
* compatibility with older backends that don't return it.
*/
sol_price_usd?: number
}

export interface FluxPayConfig {
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