feat: fvm: update the FVM/FFI to v4.1

This:

1. Adds nv22 support.
2. Updates the message tracing format.

CHANGELOG.md

@@ -4,6 +4,52 @@
 
 ## Improvements
 
+### Tracing API
+
+Replace the `CodeCid` field in the message trace (added in 1.23.4) with an `InvokedActor` field.
+
+**Before:**
+
+```javascript
+{
+    "Msg": {
+        "From": ...,
+        "To": ...,
+        ...
+        "CodeCid": ... // The actor's code CID.
+    }
+    "MsgRct": ...,
+    "GasCharges": [],
+    "Subcalls": [],
+}
+```
+
+**After:**
+
+```javascript
+{
+    "Msg": {
+        "From": ...,
+        "To": ...
+    }
+    "InvokedActor": {         // The invoked actor (ommitted if the actor wasn't invoked).
+        "Id": 1234,           // The ID of the actor.
+        "State": {            // The actor's state object (may change between network versions).
+           "Code": ...,       // The actor's code CID.
+           "Head": ...,       // The actor's state-root (when invoked).
+           "CallSeqNum": ..., // The actor's nonce.
+           "Balance": ...,    // The actor's balance (when invoked).
+           "Address": ...,    // Delegated address (FEVM only).
+        }
+    }
+    "MsgRct": ...,
+    "GasCharges": [],
+    "Subcalls": [],
+}
+```
+
+This means the trace now contains an accurate "snapshot" of the actor at the time of the call, information that may not be present in the final state-tree (e.g., due to reverts). This will hopefully improve the performance and accuracy of indexing services.
+
 # v1.25.2 / 2024-01-11 
 
 This is an optional but **highly recommended feature release** of Lotus, as it includes fixes for synchronizations issues that users have experienced. The feature release also introduces `Lotus-Provider` in its alpha testing phase, as well as the ability to call external PC2-binaries during the sealing process.

api/docgen/docgen.go

@@ -154,13 +154,14 @@ func init() {
 	addExample(map[verifreg.ClaimId]verifreg.Claim{})
 	addExample(map[string]int{"name": 42})
 	addExample(map[string]time.Time{"name": time.Unix(1615243938, 0).UTC()})
+	addExample(abi.ActorID(1000))
+	addExample(map[string]types.Actor{
+		"t01236": ExampleValue("init", reflect.TypeOf(types.Actor{}), nil).(types.Actor),
+	})
 	addExample(&types.ExecutionTrace{
 		Msg:    ExampleValue("init", reflect.TypeOf(types.MessageTrace{}), nil).(types.MessageTrace),
 		MsgRct: ExampleValue("init", reflect.TypeOf(types.ReturnTrace{}), nil).(types.ReturnTrace),
 	})
-	addExample(map[string]types.Actor{
-		"t01236": ExampleValue("init", reflect.TypeOf(types.Actor{}), nil).(types.Actor),
-	})
 	addExample(map[string]api.MarketDeal{
 		"t026363": ExampleValue("init", reflect.TypeOf(api.MarketDeal{}), nil).(api.MarketDeal),
 	})
@@ -209,7 +210,6 @@ func init() {
 	si := uint64(12)
 	addExample(&si)
 	addExample(retrievalmarket.DealID(5))
-	addExample(abi.ActorID(1000))
 	addExample(map[string]cid.Cid{})
 	addExample(map[string][]api.SealedRef{
 		"98000": {

chain/types/execresult.go

@@ -4,8 +4,6 @@ import (
 	"encoding/json"
 	"time"
 
-	"github.com/ipfs/go-cid"
-
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/exitcode"
@@ -28,7 +26,11 @@ type MessageTrace struct {
 	ParamsCodec uint64
 	GasLimit    uint64
 	ReadOnly    bool
-	CodeCid     cid.Cid
+}
+
+type ActorTrace struct {
+	Id    abi.ActorID
+	State Actor
 }
 
 type ReturnTrace struct {
@@ -38,10 +40,11 @@ type ReturnTrace struct {
 }
 
 type ExecutionTrace struct {
-	Msg        MessageTrace
-	MsgRct     ReturnTrace
-	GasCharges []*GasTrace      `cborgen:"maxlen=1000000000"`
-	Subcalls   []ExecutionTrace `cborgen:"maxlen=1000000000"`
+	Msg          MessageTrace
+	MsgRct       ReturnTrace
+	InvokedActor *ActorTrace      `json:",omitempty"`
+	GasCharges   []*GasTrace      `cborgen:"maxlen=1000000000"`
+	Subcalls     []ExecutionTrace `cborgen:"maxlen=1000000000"`
 }
 
 func (et ExecutionTrace) SumGas() GasTrace {