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# Data — Stellar Chain Queries All blockchain queries use `useStellarData()` (frontend) or Stellar SDK / RPC directly (backend). Never raw curl or manual RPC calls. ## Source Files (published with this skill) | File | Contents | |------|----------| | `templates/src/index.ts` | Express server — balance endpoint, contract query endpoint, CORS | | `templates/src/services/stellar.ts` | RPC client — `getBalances`, `queryContract`, `getContractData`, `getEvents`, `getTransaction` | ## Agentic Kit (Frontend) Import from `@/hooks/use-stellar-data`: ```ts const { getBalances, queryContract, getContractData, getEvents, getTransaction, loading, error } = useStellarData(); ``` | Method | Returns | Description | |--------|---------|-------------| | `getBalances(address)` | `{asset, balance}[]` | All trustline balances + native XLM | | `queryContract(contractId, method, args[])` | `ScVal \| null` | Read-only contract query (simulation) | | `getContractData(contractId, key)` | `ScVal \| null` | Raw contract storage entry | | `getEvents(contractId, limit?)` | `Event[]` | Contract events (newest first) | | `getTransaction(hash)` | `TxResponse \| null` | Check tx status + return value | ## Backend / API Use the Stellar SDK directly: ```ts import { rpc } from "@/lib/stellar-config"; const account = await rpc.getAccount(address); const sim = await rpc.simulateTransaction(tx); const sent = await rpc.sendTransaction(signedTx); const events = await rpc.getEvents({ contractIds: [contractId...