Fixed FallbackProvider ESM super-this out-of-order issue (#822).

ethers-io · May 12, 2020 · fde102b · fde102b
1 parent fdf2253
commit fde102b
Showing 1 changed file with 12 additions and 6 deletions.
diff --git a/packages/providers/src.ts/fallback-provider.ts b/packages/providers/src.ts/fallback-provider.ts
@@ -424,14 +424,20 @@ export class FallbackProvider extends BaseProvider {
             logger.throwArgumentError("quorum will always fail; larger than total weight", "quorum", quorum);
         }
 
-        // All networks are ready, we can know the network for certain
-        const network = checkNetworks(providerConfigs.map((c) => (<any>(c.provider)).network));
-        if (network) {
-            super(network);
-        } else {
-            super(this.detectNetwork());
+        // Are all providers' networks are known
+        let networkOrReady: Network | Promise<Network> = checkNetworks(providerConfigs.map((c) => (<any>(c.provider)).network));
+
+        // Not all networks are known; we must stall
+        if (networkOrReady == null) {
+            networkOrReady = new Promise((resolve, reject) => {
+                setTimeout(() => {
+                    this.detectNetwork().then(resolve, reject);
+                }, 0);
+            });
         }
 
+        super(networkOrReady);
+
         // Preserve a copy, so we do not get mutated
         defineReadOnly(this, "providerConfigs", Object.freeze(providerConfigs));
         defineReadOnly(this, "quorum", quorum);