Fix XYZ(xdao) message passing

contracts/xyz/XYZBroadcaster.vy

@@ -2,14 +2,19 @@
 """
 @title XYZ Broadcaster
 @author CurveFi
+@license MIT
+@custom:version 0.0.2
+@custom:security [email protected]
 """
 
+version: public(constant(String[8])) = "0.0.2"
 
 event Broadcast:
-    agent: Agent
-    chain_id: uint256
+    agent: indexed(Agent)
+    chain_id: indexed(uint256)
     nonce: uint256
     digest: bytes32
+    deadline: uint256
 
 event ApplyAdmins:
     admins: AdminSet
@@ -37,6 +42,8 @@ struct Message:
 MAX_BYTES: constant(uint256) = 1024
 MAX_MESSAGES: constant(uint256) = 8
 
+DAY: constant(uint256) = 86400
+WEEK: constant(uint256) = 7 * DAY
 
 admins: public(AdminSet)
 future_admins: public(AdminSet)
@@ -45,6 +52,7 @@ agent: HashMap[address, Agent]
 
 nonce: public(HashMap[Agent, HashMap[uint256, uint256]])  # agent -> chainId -> nonce
 digest: public(HashMap[Agent, HashMap[uint256, HashMap[uint256, bytes32]]])  # agent -> chainId -> nonce -> messageDigest
+deadline: public(HashMap[Agent, HashMap[uint256, HashMap[uint256, uint256]]])  # agent -> chainId -> nonce -> deadline
 
 
 @external
@@ -62,23 +70,41 @@ def __init__(_admins: AdminSet):
     log ApplyAdmins(_admins)
 
 
+@internal
+@pure
+def _get_ttl(agent: Agent, ttl: uint256) -> uint256:
+    if agent == Agent.EMERGENCY:
+        # Emergency votes should be brisk
+        if ttl == 0:
+            ttl = DAY  # default
+        assert ttl <= WEEK
+    else:
+        if ttl == 0:
+            ttl = WEEK  # default
+        assert DAY <= ttl and ttl <= 3 * WEEK
+    return ttl
+
+
 @external
-def broadcast(_chain_id: uint256, _messages: DynArray[Message, MAX_MESSAGES]):
+def broadcast(_chain_id: uint256, _messages: DynArray[Message, MAX_MESSAGES], _ttl: uint256=0):
     """
-    @notice Broadcast a sequence of messeages.
+    @notice Broadcast a sequence of messages.
     @param _chain_id The chain id to have messages executed on.
     @param _messages The sequence of messages to broadcast.
+    @param _ttl Time-to-leave for message if it's not executed. 0 will use default values.
     """
     agent: Agent = self.agent[msg.sender]
-    assert agent != empty(Agent)
+    assert agent != empty(Agent) and len(_messages) > 0
+    ttl: uint256 = self._get_ttl(agent, _ttl)
 
     digest: bytes32 = keccak256(_abi_encode(_messages))
     nonce: uint256 = self.nonce[agent][_chain_id]
 
     self.digest[agent][_chain_id][nonce] = digest
     self.nonce[agent][_chain_id] = nonce + 1
+    self.deadline[agent][_chain_id][nonce] = block.timestamp + ttl
 
-    log Broadcast(agent, _chain_id, nonce, digest)
+    log Broadcast(agent, _chain_id, nonce, digest, block.timestamp + ttl)
 
 
 @external