Add setup/example queries.

README.md

@@ -1,5 +1,7 @@
 # ERC20 Watcher
 
+## Overview
+
 * Create developer facing GQL schema (`erc20.graphql`) for ERC20 contracts
     * GQL `queries` that return useful information
         * Individual token data corresponding to the ERC20 ABI
@@ -10,6 +12,61 @@
 * Create a basic `React` app (`erc20-dashboard`) that consumes the GQL API from `erc20-info-server`.
 * Create a new watcher (`erc20-watcher-ts`) that is capable of watching multiple ERC20 tokens, capturing their events and state
     * Update the `erc20-info-server` GQL resolver to return data by querying the lower-layer `erc20-watcher-ts` GQL API
-    * For GQL result data, at a minimum, log the request and list of CIDs/mhKeys required to generate that result. 
+    * For GQL result data, at a minimum, log the request and list of CIDs/mhKeys required to generate that result.
         * Note: This implies, for example, performing aggregation in code instead of at the SQL layer.
 * Create an ERC20 watcher factory (`erc20-watcher-factory-ts`) that auto-detects ERC20 tokens created on-chain and calls `erc20-info-server` to request watching them.
+
+## Setup
+
+Install packages:
+
+```bash
+yarn
+```
+
+Run the GQL server:
+
+```bash
+yarn run server
+```
+
+GQL console: http://localhost:3001/graphql
+
+
+## Example GQL Queries
+
+```text
+{
+  balanceOf(blockHash: "0x77b5479a5856dd8ec63df6aabf9ce0913071a6dda3a3d54f3c9c940574bcb8ab", token: "0xd87fea54f506972e3267239ec8e159548892074a", owner: "0xDC7d7A8920C8Eecc098da5B7522a5F31509b5Bfc") {
+    value
+    proof {
+      data
+    }
+  }
+
+  allowance(blockHash: "0x77b5479a5856dd8ec63df6aabf9ce0913071a6dda3a3d54f3c9c940574bcb8ab", token: "0xd87fea54f506972e3267239ec8e159548892074a", owner: "0xDC7d7A8920C8Eecc098da5B7522a5F31509b5Bfc", spender: "0xCA6D29232D1435D8198E3E5302495417dD073d61") {
+    value
+    proof {
+      data
+    }
+  }
+
+  events(blockHash: "0x77b5479a5856dd8ec63df6aabf9ce0913071a6dda3a3d54f3c9c940574bcb8ab", token: "0xd87fea54f506972e3267239ec8e159548892074a") {
+    event {
+      ... on TransferEvent {
+        from
+        to
+        value
+      }
+      ... on ApprovalEvent {
+        owner
+        spender
+        value
+      }
+    }
+    proof {
+      data
+    }
+  }
+}
+```