chore: create base nv28 skeleton

Makefile

@@ -35,6 +35,7 @@ gen:
 	$(GO_BIN) run ./builtin/v15/gen/gen.go
 	$(GO_BIN) run ./builtin/v16/gen/gen.go
 	$(GO_BIN) run ./builtin/v17/gen/gen.go	
+	$(GO_BIN) run ./builtin/v18/gen/gen.go
 .PHONY: gen
 
 lint:

actors/version.go

@@ -26,6 +26,7 @@ const (
 	Version15 Version = 15
 	Version16 Version = 16
 	Version17 Version = 17
+	Version18 Version = 18
 )
 
 // Converts a network version into an actors adt version.
@@ -65,6 +66,8 @@ func VersionForNetwork(version network.Version) (Version, error) {
 		return Version16, nil
 	case network.Version27:
 		return Version17, nil
+	case network.Version28:
+		return Version18, nil
 	default:
 		return -1, fmt.Errorf("unsupported network version %d", version)
 	}

builtin/v18/account/account_state.go

@@ -0,0 +1,9 @@
+package account
+
+import (
+	addr "github.com/filecoin-project/go-address"
+)
+
+type State struct {
+	Address addr.Address
+}

builtin/v18/account/account_types.go

@@ -0,0 +1,6 @@
+package account
+
+type AuthenticateMessageParams struct {
+	Signature []byte
+	Message   []byte
+}

builtin/v18/account/invariants.go

@@ -0,0 +1,27 @@
+package account
+
+import (
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/builtin"
+)
+
+type StateSummary struct {
+	PubKeyAddr address.Address
+}
+
+// Checks internal invariants of account state.
+func CheckStateInvariants(st *State, idAddr address.Address) (*StateSummary, *builtin.MessageAccumulator) {
+	acc := &builtin.MessageAccumulator{}
+	accountSummary := &StateSummary{
+		PubKeyAddr: st.Address,
+	}
+
+	if id, err := address.IDFromAddress(idAddr); err != nil {
+		acc.Addf("error extracting actor ID from address: %v", err)
+	} else if id >= builtin.FirstNonSingletonActorId {
+		acc.Require(st.Address.Protocol() == address.BLS || st.Address.Protocol() == address.SECP256K1,
+			"actor address %v must be BLS or SECP256K1 protocol", st.Address)
+	}
+
+	return accountSummary, acc
+}

builtin/v18/account/methods.go

@@ -0,0 +1,15 @@
+package account
+
+import (
+	typegen "github.com/whyrusleeping/cbor-gen"
+
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/go-state-types/builtin"
+)
+
+var Methods = map[abi.MethodNum]builtin.MethodMeta{
+	1: builtin.NewMethodMeta("Constructor", *new(func(*address.Address) *abi.EmptyValue)),   // Constructor
+	2: builtin.NewMethodMeta("PubkeyAddress", *new(func(*abi.EmptyValue) *address.Address)), // PubkeyAddress
+	builtin.MustGenerateFRCMethodNum("AuthenticateMessage"): builtin.NewMethodMeta("AuthenticateMessage", *new(func(*AuthenticateMessageParams) *typegen.CborBool)), // AuthenticateMessage
+}