From 3b73a0e26908a5c147cd377efb3dbe64b6febed4 Mon Sep 17 00:00:00 2001
From: Brandon Millman <brandon.millman@gmail.com>
Date: Mon, 18 Jun 2018 18:00:32 -0700
Subject: Check network state immediately instead of waiting for delay

---
 packages/website/ts/blockchain.ts         |  6 +--
 packages/website/ts/blockchain_watcher.ts | 89 ++++++++++++++++---------------
 2 files changed, 48 insertions(+), 47 deletions(-)

(limited to 'packages/website')

diff --git a/packages/website/ts/blockchain.ts b/packages/website/ts/blockchain.ts
index 3ebdd1dee..46a4d6629 100644
--- a/packages/website/ts/blockchain.ts
+++ b/packages/website/ts/blockchain.ts
@@ -229,7 +229,7 @@ export class Blockchain {
             shouldPollUserAddress,
         );
         this._contractWrappers.setProvider(provider, this.networkId);
-        this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceState();
+        await this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceStateAsync();
         this._dispatcher.updateProviderType(ProviderType.Ledger);
     }
     public async updateProviderToInjectedAsync(): Promise<void> {
@@ -259,7 +259,7 @@ export class Blockchain {
         this._contractWrappers.setProvider(provider, this.networkId);
 
         await this.fetchTokenInformationAsync();
-        this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceState();
+        await this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceStateAsync();
         this._dispatcher.updateProviderType(ProviderType.Injected);
         delete this._ledgerSubprovider;
         delete this._cachedProvider;
@@ -816,7 +816,7 @@ export class Blockchain {
         this._userAddressIfExists = userAddresses[0];
         this._dispatcher.updateUserAddress(this._userAddressIfExists);
         await this.fetchTokenInformationAsync();
-        this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceState();
+        await this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceStateAsync();
         await this._rehydrateStoreWithContractEventsAsync();
     }
     private _updateProviderName(injectedWeb3: Web3): void {
diff --git a/packages/website/ts/blockchain_watcher.ts b/packages/website/ts/blockchain_watcher.ts
index 3890a9e57..c576db6ac 100644
--- a/packages/website/ts/blockchain_watcher.ts
+++ b/packages/website/ts/blockchain_watcher.ts
@@ -34,56 +34,15 @@ export class BlockchainWatcher {
     public updatePrevUserAddress(userAddress: string): void {
         this._prevUserAddressIfExists = userAddress;
     }
-    public startEmittingNetworkConnectionAndUserBalanceState(): void {
+    public async startEmittingNetworkConnectionAndUserBalanceStateAsync(): Promise<void> {
         if (!_.isUndefined(this._watchNetworkAndBalanceIntervalId)) {
             return; // we are already emitting the state
         }
-
-        let prevNodeVersion: string;
         this._prevUserEtherBalanceInWei = undefined;
         this._dispatcher.updateNetworkId(this._prevNetworkId);
+        await this._updateNetworkAndBalanceAsync();
         this._watchNetworkAndBalanceIntervalId = intervalUtils.setAsyncExcludingInterval(
-            async () => {
-                // Check for network state changes
-                let currentNetworkId;
-                try {
-                    currentNetworkId = await this._web3Wrapper.getNetworkIdAsync();
-                } catch (err) {
-                    // Noop
-                }
-                if (currentNetworkId !== this._prevNetworkId) {
-                    this._prevNetworkId = currentNetworkId;
-                    this._dispatcher.updateNetworkId(currentNetworkId);
-                }
-
-                // Check for node version changes
-                const currentNodeVersion = await this._web3Wrapper.getNodeVersionAsync();
-                if (currentNodeVersion !== prevNodeVersion) {
-                    prevNodeVersion = currentNodeVersion;
-                    this._dispatcher.updateNodeVersion(currentNodeVersion);
-                }
-
-                if (this._shouldPollUserAddress) {
-                    const addresses = await this._web3Wrapper.getAvailableAddressesAsync();
-                    const userAddressIfExists = addresses[0];
-                    // Update makerAddress on network change
-                    if (this._prevUserAddressIfExists !== userAddressIfExists) {
-                        this._prevUserAddressIfExists = userAddressIfExists;
-                        this._dispatcher.updateUserAddress(userAddressIfExists);
-                    }
-
-                    // Check for user ether balance changes
-                    if (!_.isUndefined(userAddressIfExists)) {
-                        await this._updateUserWeiBalanceAsync(userAddressIfExists);
-                    }
-                } else {
-                    // This logic is primarily for the Ledger, since we don't regularly poll for the address
-                    // we simply update the balance for the last fetched address.
-                    if (!_.isUndefined(this._prevUserAddressIfExists)) {
-                        await this._updateUserWeiBalanceAsync(this._prevUserAddressIfExists);
-                    }
-                }
-            },
+            this._updateNetworkAndBalanceAsync.bind(this),
             5000,
             (err: Error) => {
                 logUtils.log(`Watching network and balances failed: ${err.stack}`);
@@ -91,6 +50,48 @@ export class BlockchainWatcher {
             },
         );
     }
+    private async _updateNetworkAndBalanceAsync(): Promise<void> {
+        // Check for network state changes
+        let prevNodeVersion: string;
+        let currentNetworkId;
+        try {
+            currentNetworkId = await this._web3Wrapper.getNetworkIdAsync();
+        } catch (err) {
+            // Noop
+        }
+        if (currentNetworkId !== this._prevNetworkId) {
+            this._prevNetworkId = currentNetworkId;
+            this._dispatcher.updateNetworkId(currentNetworkId);
+        }
+
+        // Check for node version changes
+        const currentNodeVersion = await this._web3Wrapper.getNodeVersionAsync();
+        if (currentNodeVersion !== prevNodeVersion) {
+            prevNodeVersion = currentNodeVersion;
+            this._dispatcher.updateNodeVersion(currentNodeVersion);
+        }
+
+        if (this._shouldPollUserAddress) {
+            const addresses = await this._web3Wrapper.getAvailableAddressesAsync();
+            const userAddressIfExists = addresses[0];
+            // Update makerAddress on network change
+            if (this._prevUserAddressIfExists !== userAddressIfExists) {
+                this._prevUserAddressIfExists = userAddressIfExists;
+                this._dispatcher.updateUserAddress(userAddressIfExists);
+            }
+
+            // Check for user ether balance changes
+            if (!_.isUndefined(userAddressIfExists)) {
+                await this._updateUserWeiBalanceAsync(userAddressIfExists);
+            }
+        } else {
+            // This logic is primarily for the Ledger, since we don't regularly poll for the address
+            // we simply update the balance for the last fetched address.
+            if (!_.isUndefined(this._prevUserAddressIfExists)) {
+                await this._updateUserWeiBalanceAsync(this._prevUserAddressIfExists);
+            }
+        }
+    }
     private async _updateUserWeiBalanceAsync(userAddress: string): Promise<void> {
         const balanceInWei = await this._web3Wrapper.getBalanceInWeiAsync(userAddress);
         if (_.isUndefined(this._prevUserEtherBalanceInWei) || !balanceInWei.eq(this._prevUserEtherBalanceInWei)) {
-- 
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