added foreing metods to CIP30Wallet

src/Wallet/Cip30.js

@@ -1,5 +1,13 @@
 /* global BROWSER_RUNTIME */
 
+exports._getNetworkId = conn => () => conn.getNetworkId();
+
+exports._getUnusedAddresses = conn => () => conn._getUnusedAddresses();
+
+exports._getChangeAddress  = conn => () => conn._getChangeAddress();
+
+exports._getRewardAddresses   = conn => () => conn._getRewardAddresses();
+
 exports._getAddresses = conn => conn.getUsedAddresses;
 
 exports._getCollateral = maybe => conn => () =>

src/Wallet/Cip30.purs

@@ -40,6 +40,7 @@ type Cip30Wallet =
     connection :: Cip30Connection
   -- Get the address associated with the wallet (Nami does not support
   -- multiple addresses)
+  , getNetworkId :: Cip30Connection -> Aff Int
   , getWalletAddresses :: Cip30Connection -> Aff (Maybe (Array Address))
 
   -- Get combination of all available UTxOs
@@ -82,6 +83,9 @@ txToHex =
     <<< map (byteArrayToHex <<< Serialization.toBytes <<< asOneOf)
     <<< Serialization.convertTransaction
 
+getNetworkId :: Cip30Connection -> Aff Int
+getNetworkId = toAffE <<< _getNetworkId
+
 getWalletAddresses :: Cip30Connection -> Aff (Maybe (Array Address))
 getWalletAddresses conn = Promise.toAffE (_getAddresses conn) <#>
   (traverse ((addressFromBytes <<< rawBytesAsCborBytes) <=< hexToRawBytes))
@@ -143,6 +147,22 @@ fromHexString act = map hexToRawBytes <<< Promise.toAffE <<< act
 -------------------------------------------------------------------------------
 foreign import data Cip30Connection :: Type
 
+foreign import _getNetworkId 
+  :: Cip30Connection  
+  -> Effect (Promise Int)
+
+foreign import _getUnusedAddresses 
+  :: Cip30Connection  
+  -> Effect ( Promise ( Array String))
+
+foreign import _getChangeAddress
+  :: Cip30Connection  
+  -> Effect ( Promise String )
+
+foreign import _getRewardAddresses
+  :: Cip30Connection  
+  -> Effect ( Promise ( Array String))
+
 foreign import _getAddresses
   :: Cip30Connection
   -> Effect