Added information on helpers.

README.md

@@ -155,10 +155,28 @@ You can use `wallet($name)` function to do a [Multi-Wallet RPC call](https://en.
  */
 $balance = $bitcoind->wallet('wallet2.dat')->getbalance();
 
-$balance->get(); // 0.10000000
+echo $balance->get(); // 0.10000000
 ```
 
 
+## Helpers
+Package provides following helpers to assist with value handling.
+### to_bitcoin
+Converts value in satoshi to bitcoin.
+```php
+echo Denpa\Bitcoin\to_bitcoin(1000); // 0.00001000
+```
+### to_satoshi
+Converts value in bitcoin to satoshi.
+```php
+echo Denpa\Bitcoin\to_satoshi(0.00001); // 1000
+```
+### to_fixed
+Trims float value to precision without rounding.
+```php
+echo Denpa\Bitcoin\to_fixed(0.1236, 3); // 0.123
+```
+
 ## License
 
 This product is distributed under MIT license.