@arkade-os/sdk
Version:
Bitcoin wallet SDK with Taproot and Ark integration
106 lines (105 loc) • 4.49 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ExpoIndexerProvider = void 0;
const indexer_1 = require("./indexer");
const ark_1 = require("./ark");
const expoUtils_1 = require("./expoUtils");
// Helper function to convert Vtxo to VirtualCoin (same as in indexer.ts)
function convertVtxo(vtxo) {
return {
txid: vtxo.outpoint.txid,
vout: vtxo.outpoint.vout,
value: Number(vtxo.amount),
status: {
confirmed: !vtxo.isSwept && !vtxo.isPreconfirmed,
},
virtualStatus: {
state: vtxo.isSwept
? "swept"
: vtxo.isPreconfirmed
? "preconfirmed"
: "settled",
commitmentTxIds: vtxo.commitmentTxids,
batchExpiry: vtxo.expiresAt
? Number(vtxo.expiresAt) * 1000
: undefined,
},
spentBy: vtxo.spentBy ?? "",
settledBy: vtxo.settledBy,
arkTxId: vtxo.arkTxid,
createdAt: new Date(Number(vtxo.createdAt) * 1000),
isUnrolled: vtxo.isUnrolled,
isSpent: vtxo.isSpent,
};
}
/**
* Expo-compatible Indexer provider implementation using expo/fetch for streaming support.
* This provider works specifically in React Native/Expo environments where
* standard fetch streaming may not work properly but expo/fetch provides streaming capabilities.
*
* @example
* ```typescript
* import { ExpoIndexerProvider } from '@arkade-os/sdk/adapters/expo';
*
* const provider = new ExpoIndexerProvider('https://indexer.example.com');
* const vtxos = await provider.getVtxos({ scripts: ['script1'] });
* ```
*/
class ExpoIndexerProvider extends indexer_1.RestIndexerProvider {
constructor(serverUrl) {
super(serverUrl);
}
async *getSubscription(subscriptionId, abortSignal) {
// Detect if we're running in React Native/Expo environment
const isReactNative = typeof navigator !== "undefined" &&
navigator.product === "ReactNative";
const expoFetch = await (0, expoUtils_1.getExpoFetch)().catch((error) => {
// In React Native/Expo, expo/fetch is required for proper streaming support
if (isReactNative) {
throw new Error("expo/fetch is unavailable in React Native environment. " +
"Please ensure expo/fetch is installed and properly configured. " +
"Streaming support may not work with standard fetch in React Native.");
}
throw error;
});
const url = `${this.serverUrl}/v1/indexer/script/subscription/${subscriptionId}`;
while (!abortSignal.aborted) {
try {
yield* (0, expoUtils_1.sseStreamIterator)(url, abortSignal, expoFetch, { "Content-Type": "application/json" }, (data) => {
// Handle new v8 proto format with heartbeat or event
if (data.heartbeat !== undefined) {
// Skip heartbeat messages
return null;
}
// Process event messages
if (data.event) {
return {
txid: data.event.txid,
scripts: data.event.scripts || [],
newVtxos: (data.event.newVtxos || []).map(convertVtxo),
spentVtxos: (data.event.spentVtxos || []).map(convertVtxo),
sweptVtxos: (data.event.sweptVtxos || []).map(convertVtxo),
tx: data.event.tx,
checkpointTxs: data.event.checkpointTxs,
};
}
return null;
});
}
catch (error) {
if (error instanceof Error && error.name === "AbortError") {
break;
}
// ignore timeout errors, they're expected when the server is not sending anything for 5 min
// these timeouts are set by expo/fetch function
if ((0, ark_1.isFetchTimeoutError)(error)) {
console.debug("Timeout error ignored");
continue;
}
console.error("Subscription error:", error);
throw error;
}
}
}
}
exports.ExpoIndexerProvider = ExpoIndexerProvider;