Add Oracle.expiry

test/contracts/channel_on_chain_contract_oracle.aes

@@ -17,7 +17,7 @@ contract ChannelOnChainContractOracle =
       bets     = {}
       }
 
-  public stateful function place_bet(answer: string) = 
+  public stateful function place_bet(answer: string) =
     switch(Map.lookup(answer, state.bets))
       None =>
         put(state{ bets = state.bets{[answer] = Call.caller}})
@@ -25,6 +25,9 @@ contract ChannelOnChainContractOracle =
       Some(_value) =>
         "bet_already_taken"
 
+  public function expiry() =
+    Oracle.expiry(state.oracle)
+
   public function query_fee() =
     Oracle.query_fee(state.oracle)
 
@@ -35,7 +38,7 @@ contract ChannelOnChainContractOracle =
     switch(Oracle.get_answer(state.oracle, q))
       None         =>
         "no response"
-      Some(result) => 
+      Some(result) =>
         if(state.question == Oracle.get_question(state.oracle, q))
             switch(Map.lookup(result, state.bets))
               None         =>

test/contracts/unapplied_builtins.aes

@@ -21,6 +21,7 @@ contract UnappliedBuiltins =
   function b_abort()                     = abort
   function b_require()                   = require
   function oracle_query_fee()            = Oracle.query_fee
+  function oracle_expiry()               = Oracle.expiry
   stateful function oracle_query()       = Oracle.query        : (o, _, _, _, _) => _
   function oracle_get_question()         = Oracle.get_question : (o, _) => _
   function oracle_get_answer()           = Oracle.get_answer   : (o, _) => _