fix: add hasSparxProvider function and use it in SparxProviderAdapter

Author: Egor Komarov

package.json

@@ -1,6 +1,6 @@
 {
   "name": "everscale-inpage-provider",
-  "version": "0.6.1",
+  "version": "0.6.2",
   "description": "Web3-like interface to the Everscale blockchain",
   "repository": "https://github.com/broxus/everscale-inpage-provider",
   "main": "dist/index.js",

src/adapters.ts

@@ -38,6 +38,14 @@ export function hasEverscaleProvider(): Promise<boolean> {
     return ensurePageLoaded.then(() => window.__hasEverscaleProvider === true);
 }
 
+/**
+ * @category Provider
+ */
+export function hasSparxProvider(): Promise<boolean> {
+    if (!isBrowser) return Promise.resolve(false);
+    return ensurePageLoaded.then(() => !!window.__sparx);
+}
+
 /**
  * A static implementation of the `ProviderAdapter` interface that wraps a given provider instance or a promise that resolves to a provider.
  * This adapter always indicates the presence of a provider.
@@ -110,7 +118,7 @@ export class SparxProviderAdapter implements ProviderAdapter {
     }
 
     public hasProvider(): Promise<boolean> {
-        return hasEverscaleProvider();
+        return hasSparxProvider();
     }
 }