Update README to include contract summary usage

README.md

@@ -72,6 +72,20 @@ The default location for Ethereum is:
 2. In a separate terminal start listener (ipcDir location)
     - `godo populateBlocks -- --environment=<some-environment> --starting-number=<starting-block-number>`
     
+## Retrieve Contract Attributes
+
+1. Add contract ABI to contracts / environment directory:
+```
+vulcanizedb/
+    contracts/
+        public/
+            <contract-address>.json
+        private/
+```
+The name of the JSON file should correspond the contract's address.
+2. Start watching the contract `godo watchContract -- --environment=<some-environment> --contract-hash=<contract-address>`
+3. Request summary data `godo showContractSummary -- --environment=<some-environment> --contract-hash=<contract-address>`
+
 ### Configuring Additional Environments
 
 You can create configuration files for additional environments.