update README

README.md

@@ -9,6 +9,7 @@ EthereumKit is a Swift framework that enables you to create Ethereum wallet and
 - [BIP32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki)/[BIP44](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki) HD wallet
 - [EIP55](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-55.md) format address encoding
 - See currency balance of an address.
+- Get transactions of an address.
 
 ## How to Use
 
@@ -119,6 +120,58 @@ geth.getAccount(address: "0x91c79f31De5208fadCbF83f0a7B0A9b6d8aBA90F") { result
 }
 ```
 
+***
+
+#### `GetTransactionCount`
+
+Returns a number of transactions that a specified address has.
+
+##### Parameters
+
+1. `address` - the Address you want to get a balance of.
+2. `blockParameter`: based on what block parameter you want to see a balance. default is `latest`. see the [default block parameter](#the-default-block-parameter).
+
+##### Returns
+
+A number of transactions the specified address has.
+
+##### Example
+        
+```swift
+let geth = Geth(network: .test)
+geth.getTransactionCount(address: "0x91c79f31De5208fadCbF83f0a7B0A9b6d8aBA90F") { result in
+    // do something...
+}
+```
+
+## Etherscan API
+
+***
+
+#### `GetTransactions`
+
+Return a list of transactions of specified address
+
+##### Parameters
+
+1. `address` - the Address you want to get a balance of.
+2. `sort` - asc or des
+3. `startblock` - from which block you want to search
+4. `endblock` - to which block you want to search
+
+##### Returns
+
+List of `Transaction` of specified address.
+
+##### Example
+        
+```swift
+let geth = Geth(network: .test)
+geth.getTransactions(address: "0x91c79f31De5208fadCbF83f0a7B0A9b6d8aBA90F", sort: .asc, startBlock: 0, endBlock: 9999999) { result in
+    // do something...
+}
+```
+
 ## Installation
 #### [Carthage](https://github.com/Carthage/Carthage)