Removing Outdated References to Misbehavior Arbitration Subsystem (#6814)

* Provisioner guide entry update

* Removing mentions of misbehavior arbitration sub

* fmt

Author: BradleyOlson64

node/subsystem-types/src/messages.rs

@@ -68,7 +68,8 @@ pub enum CandidateBackingMessage {
 	/// given relay-parent (ref. by hash). This candidate must be validated.
 	Second(Hash, CandidateReceipt, PoV),
 	/// Note a validator's statement about a particular candidate. Disagreements about validity must be escalated
-	/// to a broader check by Misbehavior Arbitration. Agreements are simply tallied until a quorum is reached.
+	/// to a broader check by the Disputes Subsystem, though that escalation is deferred until the approval voting
+	/// stage to guarantee availability. Agreements are simply tallied until a quorum is reached.
 	Statement(Hash, SignedFullStatement),
 }
 

roadmap/implementers-guide/src/SUMMARY.md

@@ -63,7 +63,6 @@
     - [Provisioner](node/utility/provisioner.md)
     - [Network Bridge](node/utility/network-bridge.md)
     - [Gossip Support](node/utility/gossip-support.md)
-    - [Misbehavior Arbitration](node/utility/misbehavior-arbitration.md)
     - [Peer Set Manager](node/utility/peer-set-manager.md)
     - [Runtime API Requests](node/utility/runtime-api.md)
     - [Chain API Requests](node/utility/chain-api.md)

roadmap/implementers-guide/src/node/backing/statement-distribution.md

@@ -21,7 +21,7 @@ Output:
 
 Implemented as a gossip protocol. Handle updates to our view and peers' views. Neighbor packets are used to inform peers which chain heads we are interested in data for.
 
-It is responsible for distributing signed statements that we have generated and forwarding them, and for detecting a variety of Validator misbehaviors for reporting to [Misbehavior Arbitration](../utility/misbehavior-arbitration.md). During the Backing stage of the inclusion pipeline, it's the main point of contact with peer nodes. On receiving a signed statement from a peer in the same backing group, assuming the peer receipt state machine is in an appropriate state, it sends the Candidate Receipt to the [Candidate Backing subsystem](candidate-backing.md) to handle the validator's statement. On receiving `StatementDistributionMessage::Share` we make sure to send messages to our backing group in addition to random other peers, to ensure a fast backing process and getting all statements quickly for distribution.
+It is responsible for distributing signed statements that we have generated and forwarding them, and for detecting a variety of Validator misbehaviors for reporting to the [Provisioner Subsystem](../utility/provisioner.md). During the Backing stage of the inclusion pipeline, it's the main point of contact with peer nodes. On receiving a signed statement from a peer in the same backing group, assuming the peer receipt state machine is in an appropriate state, it sends the Candidate Receipt to the [Candidate Backing subsystem](candidate-backing.md) to handle the validator's statement. On receiving `StatementDistributionMessage::Share` we make sure to send messages to our backing group in addition to random other peers, to ensure a fast backing process and getting all statements quickly for distribution.
 
 Track equivocating validators and stop accepting information from them. Establish a data-dependency order:
 

roadmap/implementers-guide/src/node/utility/misbehavior-arbitration.md

@@ -30,7 +30,14 @@ Dispute resolution is complex and is explained in substantially more detail [her
 
 ## Protocol
 
-Input: [`ProvisionerMessage`](../../types/overseer-protocol.md#provisioner-message). Backed candidates come from the [Candidate Backing subsystem](../backing/candidate-backing.md), signed bitfields come from the [Bitfield Distribution subsystem](../availability/bitfield-distribution.md), and misbehavior reports and disputes come from the [Misbehavior Arbitration subsystem](misbehavior-arbitration.md).
+Input: [`ProvisionerMessage`](../../types/overseer-protocol.md#provisioner-message). Backed candidates come from the [Candidate Backing subsystem](../backing/candidate-backing.md), signed bitfields come from the [Bitfield Distribution subsystem](../availability/bitfield-distribution.md), and disputes come from the [Disputes Subsystem](../disputes/dispute-coordinator.md). Misbehavior reports are currently sent from the [Candidate Backing subsystem](../backing/candidate-backing.md) and contain the following misbehaviors:
+
+1. `Misbehavior::ValidityDoubleVote`
+2. `Misbehavior::MultipleCandidates`
+3. `Misbehavior::UnauthorizedStatement`
+4. `Misbehavior::DoubleSign`
+
+But we choose not to punish these forms of misbehavior for the time being. Risks from misbehavior are sufficiently mitigated at the protocol level via reputation changes. Punitive actions here may become desirable enough to dedicate time to in the future.
 
 At initialization, this subsystem has no outputs.
 

roadmap/implementers-guide/src/node/utility/provisioner.md

@@ -309,7 +309,8 @@ enum CandidateBackingMessage {
   /// The PoV is expected to match the `pov_hash` in the descriptor.
   Second(Hash, CandidateReceipt, PoV),
   /// Note a peer validator's statement about a particular candidate. Disagreements about validity must be escalated
-  /// to a broader check by Misbehavior Arbitration. Agreements are simply tallied until a quorum is reached.
+  /// to a broader check by the Disputes Subsystem, though that escalation is deferred until the approval voting 
+  /// stage to guarantee availability. Agreements are simply tallied until a quorum is reached.
   Statement(Statement),
 }
 ```