Merge branch 'development' into feature/testnet-faucets/order-dispenser

* development: (37 commits)
  Add dates to CHANGELOGs
  Change CHANGELOGs
  Add .editorconfig
  Fix a typo
  Temp
  Use forEach instead of map
  Add PR number
  Fix an exception when a signature collision happens
  Fix prettier
  Add regression tests
  Improve the comment and fix an exception
  Add missing comas
  Lerna-ignore tslint and tsconfig
  Update contract versions, fix tests
  Rename directories
  Rename previous contracts, fix imports, add nested file structure
  Move all contracts into a single directory
  Update import
  Fix import
  Get rid of suffixed contract versioning and replace it with a poor-mans package manager. Versions are stored locally, and are generated in a copy-on-write basis as required
  ...

1 files changed, 32 insertions, 0 deletions

diff --git a/packages/long-lived-subscriptions-test/src/index.ts b/packages/long-lived-subscriptions-test/src/index.ts
new file mode 100644
index 000000000..2d79dcc89
--- /dev/null
+++ b/packages/long-lived-subscriptions-test/src/index.ts
@@ -0,0 +1,32 @@
+import { DecodedLogEvent, ExchangeEvents, LogFillContractEventArgs, ZeroEx } from '0x.js';
+import * as _ from 'lodash';
+import * as Web3 from 'web3';
+
+const zeroExConfig = {
+    networkId: 1,
+};
+
+const RPC_URL = 'https://mainnet.infura.io/T5WSC8cautR4KXyYgsRs';
+// const RPC_URL = 'https://mainnet.0xproject.com';
+
+const web3 = new Web3(new Web3.providers.HttpProvider(RPC_URL));
+const zeroEx = new ZeroEx(web3.currentProvider, zeroExConfig);
+
+const subscribe = () => {
+    console.log('subscribing...');
+    zeroEx.exchange.subscribe<LogFillContractEventArgs>(
+        ExchangeEvents.LogFill,
+        {},
+        (err: Error | null, event?: DecodedLogEvent<LogFillContractEventArgs>) => {
+            if (_.isNull(err)) {
+                console.log('EVENT');
+                console.log(event);
+            } else {
+                console.log('ERROR');
+                console.log(err);
+                subscribe();
+            }
+        },
+    );
+};
+subscribe();