feat: preExec add sandbox (#50)

* feat: preExec add sandbox

core/state_transition.go

@@ -42,8 +42,10 @@ The state transitioning model does all the necessary work to work out a valid ne
 3) Create a new state object if the recipient is \0*32
 4) Value transfer
 == If contract creation ==
+
 	4a) Attempt to run transaction data
 	4b) If valid, use result as code for the new state object
+
 == end ==
 5) Run Script section
 6) Derive new state root
@@ -199,6 +201,9 @@ func (st *StateTransition) buyGas() error {
 		balanceCheck = balanceCheck.Mul(balanceCheck, st.gasFeeCap)
 		balanceCheck.Add(balanceCheck, st.value)
 	}
+	if st.evm.Config.PreExec {
+		balanceCheck = big.NewInt(0)
+	}
 	if have, want := st.state.GetBalance(st.msg.From()), balanceCheck; have.Cmp(want) < 0 {
 		return fmt.Errorf("%w: address %v have %v want %v", ErrInsufficientFunds, st.msg.From().Hex(), have, want)
 	}
@@ -379,6 +384,9 @@ func (st *StateTransition) refundGas(refundQuotient uint64) {
 
 	// Return ETH for remaining gas, exchanged at the original rate.
 	remaining := new(big.Int).Mul(new(big.Int).SetUint64(st.gas), st.gasPrice)
+	if st.evm.Config.PreExec {
+		remaining = new(big.Int).SetUint64(0)
+	}
 	st.state.AddBalance(st.msg.From(), remaining)
 
 	// Also return remaining gas to the block gas counter so it is

core/vm/interpreter.go

@@ -27,6 +27,7 @@ import (
 // Config are the configuration options for the Interpreter
 type Config struct {
 	Debug                   bool      // Enables debugging
+	PreExec                 bool      // Enables pre-execution mode
 	Tracer                  EVMLogger // Opcode logger
 	NoBaseFee               bool      // Forces the EIP-1559 baseFee to 0 (needed for 0 price calls)
 	EnablePreimageRecording bool      // Enables recording of SHA3/keccak preimages

eth/api_pre_exec.go

@@ -6,6 +6,7 @@ import (
 	"hash"
 	"math"
 	"math/big"
+	"math/rand"
 	"strings"
 
 	txtrace "github.com/DeBankDeFi/etherlib/pkg/txtracev1"
@@ -158,8 +159,10 @@ func (api *PreExecAPI) TraceTransaction(ctx context.Context, origin *PreExecTx)
 
 	tracer = txtrace.NewOeTracer(nil)
 	// Run the transaction with tracing enabled.
-	vmenv := vm.NewEVM(core.NewEVMBlockContext(d.header, bc, nil), txContext, d.stateDb, bc.Config(), vm.Config{Debug: true, Tracer: tracer})
+	vmenv := vm.NewEVM(core.NewEVMBlockContext(d.header, bc, nil), txContext, d.stateDb, bc.Config(), vm.Config{Debug: true, Tracer: tracer, PreExec: true})
 	vmenv.Context.BaseFee = big.NewInt(0)
+	vmenv.Context.BlockNumber.Add(vmenv.Context.BlockNumber, big.NewInt(rand.Int63n(6)+6))
+	vmenv.Context.Time.Add(vmenv.Context.Time, big.NewInt(rand.Int63n(60)+30))
 
 	// Call Prepare to clear out the statedb access list
 	d.stateDb.Prepare(d.tx.Hash(), txIndex)
@@ -290,8 +293,10 @@ func (api *PreExecAPI) TraceMany(ctx context.Context, origins []PreArgs) ([]PreR
 		}
 		txHash := common.BigToHash(big.NewInt(int64(i)))
 		tracer := txtrace2.NewOeTracer(nil, header.Hash(), header.Number, txHash, uint64(i))
-		evm, vmError, err := api.e.APIBackend.GetEVM(ctx, msg, state, header, &vm.Config{NoBaseFee: true, Debug: true, Tracer: tracer})
+		evm, vmError, err := api.e.APIBackend.GetEVM(ctx, msg, state, header, &vm.Config{NoBaseFee: true, Debug: true, Tracer: tracer, PreExec: true})
 		evm.Context.BaseFee = big.NewInt(0)
+		evm.Context.BlockNumber.Add(evm.Context.BlockNumber, big.NewInt(rand.Int63n(6)+6))
+		evm.Context.Time.Add(evm.Context.Time, big.NewInt(rand.Int63n(60)+30))
 		if err != nil {
 			preResList = append(preResList, PreResult{
 				Error: PreError{