From 81cacd76a7b670d0524a3c509003c28fb4f5646a Mon Sep 17 00:00:00 2001
From: Geoff Stuart <geoff.vball@gmail.com>
Date: Mon, 6 Jun 2022 23:14:16 -0400
Subject: [PATCH] Implement function to access state of system actor

---
 chain/actors/builtin/system/actor.go.template | 2 ++
 chain/actors/builtin/system/state.go.template | 8 ++++++++
 chain/actors/builtin/system/system.go         | 2 ++
 chain/actors/builtin/system/v0.go             | 6 ++++++
 chain/actors/builtin/system/v2.go             | 6 ++++++
 chain/actors/builtin/system/v3.go             | 6 ++++++
 chain/actors/builtin/system/v4.go             | 6 ++++++
 chain/actors/builtin/system/v5.go             | 6 ++++++
 chain/actors/builtin/system/v6.go             | 6 ++++++
 chain/actors/builtin/system/v7.go             | 6 ++++++
 chain/actors/builtin/system/v8.go             | 6 ++++++
 11 files changed, 60 insertions(+)

diff --git a/chain/actors/builtin/system/actor.go.template b/chain/actors/builtin/system/actor.go.template
index 616a20a76..a3fb6127d 100644
--- a/chain/actors/builtin/system/actor.go.template
+++ b/chain/actors/builtin/system/actor.go.template
@@ -4,6 +4,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors/adt"
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/ipfs/go-cid"
 
 	"golang.org/x/xerrors"
 
@@ -60,4 +61,5 @@ func MakeState(store adt.Store, av actors.Version) (State, error) {
 
 type State interface {
 	GetState() interface{}
+	GetBuiltinActors() cid.Cid
 }
diff --git a/chain/actors/builtin/system/state.go.template b/chain/actors/builtin/system/state.go.template
index ddf458305..de3f2dcdf 100644
--- a/chain/actors/builtin/system/state.go.template
+++ b/chain/actors/builtin/system/state.go.template
@@ -36,4 +36,12 @@ type state{{.v}} struct {
 
 func (s *state{{.v}}) GetState() interface{} {
 	return &s.State
+}
+
+func (s *state{{.v}}) GetBuiltinActors() cid.Cid {
+{{if (le .v 7)}}
+	return cid.Undef
+{{else}}
+	return s.State.BuiltinActors
+{{end}}
 }
\ No newline at end of file
diff --git a/chain/actors/builtin/system/system.go b/chain/actors/builtin/system/system.go
index 71d7f7024..fd3997147 100644
--- a/chain/actors/builtin/system/system.go
+++ b/chain/actors/builtin/system/system.go
@@ -4,6 +4,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/ipfs/go-cid"
 
 	"golang.org/x/xerrors"
 
@@ -103,4 +104,5 @@ func MakeState(store adt.Store, av actors.Version) (State, error) {
 
 type State interface {
 	GetState() interface{}
+	GetBuiltinActors() cid.Cid
 }
diff --git a/chain/actors/builtin/system/v0.go b/chain/actors/builtin/system/v0.go
index 64c6f53d3..a5aa8e8fa 100644
--- a/chain/actors/builtin/system/v0.go
+++ b/chain/actors/builtin/system/v0.go
@@ -33,3 +33,9 @@ type state0 struct {
 func (s *state0) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state0) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v2.go b/chain/actors/builtin/system/v2.go
index eb540891c..aea9eff7b 100644
--- a/chain/actors/builtin/system/v2.go
+++ b/chain/actors/builtin/system/v2.go
@@ -33,3 +33,9 @@ type state2 struct {
 func (s *state2) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state2) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v3.go b/chain/actors/builtin/system/v3.go
index 5b04e189e..fd5f0cd50 100644
--- a/chain/actors/builtin/system/v3.go
+++ b/chain/actors/builtin/system/v3.go
@@ -33,3 +33,9 @@ type state3 struct {
 func (s *state3) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state3) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v4.go b/chain/actors/builtin/system/v4.go
index b6c924978..fbdec7e93 100644
--- a/chain/actors/builtin/system/v4.go
+++ b/chain/actors/builtin/system/v4.go
@@ -33,3 +33,9 @@ type state4 struct {
 func (s *state4) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state4) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v5.go b/chain/actors/builtin/system/v5.go
index 77d2a8478..3d3c27a12 100644
--- a/chain/actors/builtin/system/v5.go
+++ b/chain/actors/builtin/system/v5.go
@@ -33,3 +33,9 @@ type state5 struct {
 func (s *state5) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state5) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v6.go b/chain/actors/builtin/system/v6.go
index 689620afb..314308845 100644
--- a/chain/actors/builtin/system/v6.go
+++ b/chain/actors/builtin/system/v6.go
@@ -33,3 +33,9 @@ type state6 struct {
 func (s *state6) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state6) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v7.go b/chain/actors/builtin/system/v7.go
index 813add5fb..3987db8dd 100644
--- a/chain/actors/builtin/system/v7.go
+++ b/chain/actors/builtin/system/v7.go
@@ -33,3 +33,9 @@ type state7 struct {
 func (s *state7) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state7) GetBuiltinActors() cid.Cid {
+
+	return cid.Undef
+
+}
diff --git a/chain/actors/builtin/system/v8.go b/chain/actors/builtin/system/v8.go
index 2e0e2ba56..30e9d6be8 100644
--- a/chain/actors/builtin/system/v8.go
+++ b/chain/actors/builtin/system/v8.go
@@ -33,3 +33,9 @@ type state8 struct {
 func (s *state8) GetState() interface{} {
 	return &s.State
 }
+
+func (s *state8) GetBuiltinActors() cid.Cid {
+
+	return s.State.BuiltinActors
+
+}