From 0d384050fa623437654f47a7fb8a06fa3986f27d Mon Sep 17 00:00:00 2001
From: frrist <forrest@protocol.ai>
Date: Mon, 26 Oct 2020 14:20:25 -0700
Subject: [PATCH] polish: add Equals method to MinerInfo shim

---
 chain/actors/builtin/miner/miner.go | 1 +
 chain/actors/builtin/miner/v0.go    | 9 +++++++++
 chain/actors/builtin/miner/v2.go    | 9 +++++++++
 3 files changed, 19 insertions(+)

diff --git a/chain/actors/builtin/miner/miner.go b/chain/actors/builtin/miner/miner.go
index aad41e8a9..5821d092b 100644
--- a/chain/actors/builtin/miner/miner.go
+++ b/chain/actors/builtin/miner/miner.go
@@ -77,6 +77,7 @@ type State interface {
 	DeadlinesChanged(State) (bool, error)
 
 	Info() (MinerInfo, error)
+	MinerInfoChanged(State) (bool, error)
 
 	DeadlineInfo(epoch abi.ChainEpoch) (*dline.Info, error)
 
diff --git a/chain/actors/builtin/miner/v0.go b/chain/actors/builtin/miner/v0.go
index c79f4a2f7..69160e4e0 100644
--- a/chain/actors/builtin/miner/v0.go
+++ b/chain/actors/builtin/miner/v0.go
@@ -277,6 +277,15 @@ func (s *state0) DeadlinesChanged(other State) (bool, error) {
 	return !s.State.Deadlines.Equals(other0.Deadlines), nil
 }
 
+func (s *state0) MinerInfoChanged(other State) (bool, error) {
+	other0, ok := other.(*state0)
+	if !ok {
+		// treat an upgrade as a change, always
+		return true, nil
+	}
+	return !s.State.Info.Equals(other0.State.Info), nil
+}
+
 func (s *state0) Info() (MinerInfo, error) {
 	info, err := s.State.GetInfo(s.store)
 	if err != nil {
diff --git a/chain/actors/builtin/miner/v2.go b/chain/actors/builtin/miner/v2.go
index c686fa483..2c67484ea 100644
--- a/chain/actors/builtin/miner/v2.go
+++ b/chain/actors/builtin/miner/v2.go
@@ -276,6 +276,15 @@ func (s *state2) DeadlinesChanged(other State) (bool, error) {
 	return !s.State.Deadlines.Equals(other2.Deadlines), nil
 }
 
+func (s *state2) MinerInfoChanged(other State) (bool, error) {
+	other0, ok := other.(*state2)
+	if !ok {
+		// treat an upgrade as a change, always
+		return true, nil
+	}
+	return !s.State.Info.Equals(other0.State.Info), nil
+}
+
 func (s *state2) Info() (MinerInfo, error) {
 	info, err := s.State.GetInfo(s.store)
 	if err != nil {