eth/tracers: fix the issue of panic in prestate with diffmode (#25957)

In some cases, inner contract creation may not be successful, and an inner contract was not created. This PR fixes a crash that could occur when doing tracing in such situations.

eth/tracers/internal/tracetest/calltrace_test.go

@@ -103,7 +103,7 @@ func testCallTracer(tracerName string, dirPath string, t *testing.T) {
 			} else if err := json.Unmarshal(blob, test); err != nil {
 				t.Fatalf("failed to parse testcase: %v", err)
 			}
-			if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
+			if err := tx.UnmarshalBinary(common.FromHex(test.Input)); err != nil {
 				t.Fatalf("failed to parse testcase input: %v", err)
 			}
 			// Configure a blockchain with the given prestate
@@ -122,6 +122,7 @@ func testCallTracer(tracerName string, dirPath string, t *testing.T) {
 					Time:        new(big.Int).SetUint64(uint64(test.Context.Time)),
 					Difficulty:  (*big.Int)(test.Context.Difficulty),
 					GasLimit:    uint64(test.Context.GasLimit),
+					BaseFee:     test.Genesis.BaseFee,
 				}
 				_, statedb = tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false)
 			)

eth/tracers/internal/tracetest/prestate_test.go

@@ -30,7 +30,6 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/eth/tracers"
-	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/tests"
 )
 
@@ -87,7 +86,7 @@ func testPrestateDiffTracer(tracerName string, dirPath string, t *testing.T, typ
 			} else if err := json.Unmarshal(blob, test); err != nil {
 				t.Fatalf("failed to parse testcase: %v", err)
 			}
-			if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
+			if err := tx.UnmarshalBinary(common.FromHex(test.Input)); err != nil {
 				t.Fatalf("failed to parse testcase input: %v", err)
 			}
 			// Configure a blockchain with the given prestate
@@ -106,6 +105,7 @@ func testPrestateDiffTracer(tracerName string, dirPath string, t *testing.T, typ
 					Time:        new(big.Int).SetUint64(uint64(test.Context.Time)),
 					Difficulty:  (*big.Int)(test.Context.Difficulty),
 					GasLimit:    uint64(test.Context.GasLimit),
+					BaseFee:     test.Genesis.BaseFee,
 				}
 				_, statedb = tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false)
 			)

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/create_failed.json

+{
+  "genesis": {
+    "baseFeePerGas": "51088069741",
+    "difficulty": "14315558652874667",
+    "extraData": "0xd883010a10846765746888676f312e31362e35856c696e7578",
+    "gasLimit": "30058590",
+    "hash": "0xdf6b95183f99054fb6541e3b482c0109c9f6be40553cff24efa3ac76736adbf5",
+    "miner": "0xb7e390864a90b7b923c9f9310c6f98aafe43f707",
+    "mixHash": "0x8d76b0d32e42ab277dbf00836eabef76674cd70ae2bb53718175069ad6b6147e",
+    "nonce": "0x8d3a1c010ad2c687",
+    "number": "14707767",
+    "stateRoot": "0x8a50c896a6f7eb1f3479337db981fa10ce316281cb4dd2f07487be9ca27dae6b",
+    "timestamp": "1651623275",
+    "alloc": {
+      "0x0000000000000000000000000000000000000000": {
+        "balance": "0x268fd0b894b8c4f6d1f"
+      },
+      "0x13b152c9f50878ffaf3de41e192653bda545d889": {
+        "balance": "0x0",
+        "nonce": "1",
+        "code": "0x363d3d373d3d3d363d73059ffafdc6ef594230de44f824e2bd0a51ca5ded5af43d82803e903d91602b57fd5bf3"
+      },
+      "0x808b4da0be6c9512e948521452227efc619bea52": {
+        "balance": "0x2cdb96c56db040b43",
+        "nonce": "1223932"
+      },
+      "0x8f03f1a3f10c05e7cccf75c1fd10168e06659be7": {
+        "balance": "0x38079b28689d40240e",
+        "nonce": "44"
+      },
+      "0xffa397285ce46fb78c588a9e993286aac68c37cd": {
+        "balance": "0x0",
+        "nonce": "747319",
+        "code": "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",
+        "storage": {
+          "0x0000000000000000000000000000000000000000000000000000000000000000": "0x000000000000000000000000059ffafdc6ef594230de44f824e2bd0a51ca5ded"
+        }
+      }
+    },
+    "config": {
+      "chainId": 1,
+      "homesteadBlock": 1150000,
+      "daoForkBlock": 1920000,
+      "daoForkSupport": true,
+      "eip150Block": 2463000,
+      "eip150Hash": "0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0",
+      "eip155Block": 2675000,
+      "eip158Block": 2675000,
+      "byzantiumBlock": 4370000,
+      "constantinopleBlock": 7280000,
+      "petersburgBlock": 7280000,
+      "istanbulBlock": 9069000,
+      "muirGlacierBlock": 9200000,
+      "berlinBlock": 12244000,
+      "londonBlock": 12965000,
+      "arrowGlacierBlock": 13773000,
+      "grayGlacierBlock": 15050000,
+      "terminalTotalDifficultyPassed": true,
+      "ethash": {}
+    }
+  },
+  "context": {
+    "number": "14707768",
+    "difficulty": "14322823549655084",
+    "timestamp": "1651623279",
+    "gasLimit": "30029237",
+    "miner": "0x8f03f1a3f10c05e7cccf75c1fd10168e06659be7"
+  },
+  "input": "0x02f8b4018312acfc8459682f00851a46bcf47a8302b1a194ffa397285ce46fb78c588a9e993286aac68c37cd80b844fb90b3200000000000000000000000002a549b4af9ec39b03142da6dc32221fc390b553300000000000000000000000000000000000000000000000000000000000cb3d5c001a03002079d2873f7963c4278200c43aa71efad262b2150bc8524480acfc38b5faaa077d44aa09d56b9cf99443c7f55aaad1bbae9cfb5bbb9de31eaf7a8f9e623e980",
+  "tracerConfig": {
+    "diffMode": true
+  },
+  "result": {
+    "pre": {
+      "0x808b4da0be6c9512e948521452227efc619bea52": {
+        "balance": "0x2cdb96c56db040b43",
+        "nonce": 1223932
+      },
+      "0x8f03f1a3f10c05e7cccf75c1fd10168e06659be7": {
+        "balance": "0x38079b28689d40240e",
+        "nonce": 44
+      }
+    },
+    "post": {
+      "0x808b4da0be6c9512e948521452227efc619bea52": {
+        "balance": "0x2cd72a36dd031f089",
+        "nonce": 1223933
+      },
+      "0x8f03f1a3f10c05e7cccf75c1fd10168e06659be7": {
+        "balance": "0x38079c19423e44b30e"
+      }
+    }
+  }
+}

eth/tracers/native/prestate.go

@@ -229,10 +229,12 @@ func (t *prestateTracer) CaptureTxEnd(restGas uint64) {
 	// the new created contracts' prestate were empty, so delete them
 	for a := range t.created {
 		// the created contract maybe exists in statedb before the creating tx
-		if s := t.pre[a]; s.Balance.Cmp(big.NewInt(0)) == 0 && len(s.Storage) == 0 && len(s.Code) == 0 {
+		if s := t.pre[a]; s != nil {
+			if s.Balance.Sign() == 0 && len(s.Storage) == 0 && len(s.Code) == 0 {
 				delete(t.pre, a)
 			}
 		}
+	}
 }
 
 // GetResult returns the json-encoded nested list of call traces, and any