)
}
```
### Hook API
```typescript
const {
send, // (message: string) => Promise
messages, // Array<{ role: string; content: string }>
status, // "idle" | "streaming" | "settling" | "error"
balance, // { creditsRemaining: number; usdcValue: number } | null
lastReceipt, // JobReceipt | null
error, // Error | null
reset // () => void, clears the conversation
} = useDecentralChat({
model: "qwen3-8b",
apiKey: "dcntrl_live_...",
systemPrompt: "You are a helpful assistant.", // optional
onComplete: (receipt) => { ... }, // optional callback
onError: (error) => { ... } // optional callback
})
```
***
## Account and credits
```typescript
const account = await client.account.get()
// {
// wallet: "7xKXtg2C...",
// creditsRemaining: 1420,
// usdcValue: 14.20,
// lastTopupAt: Date
// }
// List recent jobs
const jobs = await client.jobs.list({ limit: 10, status: "settled" })
for (const job of jobs.data) {
console.log(`${job.id}: ${job.model} - ${job.creditsCharged} credits`)
}
```
***
## Webhooks
```typescript
import { verifyWebhookSignature, type DecentralWebhookEvent } from "@usedecentral/sdk"
// Verify and parse a webhook in an Express handler
app.post("/webhook", express.raw({ type: "application/json" }), (req, res) => {
const signature = req.headers["decentral-signature"] as string
const isValid = verifyWebhookSignature(
req.body.toString(),
signature,
process.env.WEBHOOK_SECRET!
)
if (!isValid) {
return res.status(400).json({ error: "Invalid signature" })
}
const event: DecentralWebhookEvent = JSON.parse(req.body.toString())
switch (event.event) {
case "job.completed":
console.log("Job settled:", event.data.settlementTx)
break
case "credit.low":
console.log("Credits low:", event.data.creditsRemaining)
break
}
res.json({ received: true })
})
```
***
## Client configuration
```typescript
const client = new DecentralClient({
apiKey: "dcntrl_live_...", // required
baseURL: "https://api.usedecentral.org/v1", // default, override for testing
timeout: 180_000, // request timeout in ms (default: 120000)
maxRetries: 3, // auto-retry on 5xx and 503 (default: 2)
defaultHeaders: { // added to every request
"x-app-version": "1.0.0"
}
})
```
***
## TypeScript types
Key types exported from `@usedecentral/sdk`:
```typescript
import type {
ChatCompletion,
ChatCompletionChunk,
ChatCompletionCreateParams,
JobReceipt,
Job,
Account,
Model,
DecentralModel, // extends Model with tier, workers, latency
WebhookEvent,
JobCompletedEvent,
CreditLowEvent
} from "@usedecentral/sdk"
```
---
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