AFG messaging (#210)

* First draft of afg messaging

* AfgReceivedPrevote, AfgReceivedPrecommit and AfgFinalized added to rust backend

* Tidy up

backend/src/node/message.rs

@@ -37,13 +37,13 @@ pub enum Details {
     #[serde(rename = "txpool.import")]
     TxPoolImport(IgnoredAny),
     #[serde(rename = "afg.finalized")]
-    AfgFinalized(IgnoredAny),
+    AfgFinalized(AfgFinalized),
     #[serde(rename = "afg.received_precommit")]
-    AfgReceivedPrecommit(IgnoredAny),
+    AfgReceivedPrecommit(AfgReceivedPrecommit),
     #[serde(rename = "afg.received_prevote")]
-    AfgReceivedPrevote(IgnoredAny),
+    AfgReceivedPrevote(AfgReceivedPrevote),
     #[serde(rename = "afg.received_commit")]
-    AfgReceivedCommit(IgnoredAny),
+    AfgReceivedCommit(AfgReceivedCommit),
     #[serde(rename = "afg.authority_set")]
     AfgAuthoritySet(AfgAuthoritySet),
     #[serde(rename = "afg.finalized_blocks_up_to")]
@@ -86,6 +86,39 @@ pub struct Finalized {
 #[derive(Deserialize, Debug)]
 pub struct AfgAuthoritySet {
     pub authority_id: Box<str>,
+    pub authorities: Box<str>,
+    pub authority_set_id: Box<str>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct AfgFinalized {
+    pub finalized_hash: BlockHash,
+    pub finalized_number: Box<str>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct AfgReceived {
+    pub target_hash: BlockHash,
+    pub target_number: Box<str>,
+    pub voter: Box<str>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct AfgReceivedPrecommit {
+    #[serde(flatten)]
+    pub received: AfgReceived,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct AfgReceivedPrevote {
+    #[serde(flatten)]
+    pub received: AfgReceived,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct AfgReceivedCommit {
+    #[serde(flatten)]
+    pub received: AfgReceived,
 }
 
 impl Block {