cmd/evm: fixup issues with requests in t8n (ethereum#30584)

This fixes a few issues missed in ethereum#29052:

* `requests` must be hex encoded, so added a helper to marshal.
* The statedb was committed too early and so the result of the system
calls was lost.
* For devnet-4 we need to pull off the type byte prefix from the request
data.

Author: lightclient

cmd/evm/internal/t8ntool/execution.go

@@ -23,6 +23,7 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/consensus/misc"
@@ -50,6 +51,8 @@ type Prestate struct {
 	Pre types.GenesisAlloc `json:"pre"`
 }
 
+//go:generate go run github.com/fjl/gencodec -type ExecutionResult -field-override executionResultMarshaling -out gen_execresult.go
+
 // ExecutionResult contains the execution status after running a state test, any
 // error that might have occurred and a dump of the final state if requested.
 type ExecutionResult struct {
@@ -70,6 +73,10 @@ type ExecutionResult struct {
 	Requests             [][]byte              `json:"requests,omitempty"`
 }
 
+type executionResultMarshaling struct {
+	Requests []hexutil.Bytes `json:"requests,omitempty"`
+}
+
 type ommer struct {
 	Delta   uint64         `json:"delta"`
 	Address common.Address `json:"address"`
@@ -354,6 +361,28 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
 		amount := new(big.Int).Mul(new(big.Int).SetUint64(w.Amount), big.NewInt(params.GWei))
 		statedb.AddBalance(w.Address, uint256.MustFromBig(amount), tracing.BalanceIncreaseWithdrawal)
 	}
+
+	// Gather the execution-layer triggered requests.
+	var requests [][]byte
+	if chainConfig.IsPrague(vmContext.BlockNumber, vmContext.Time) {
+		// EIP-6110 deposits
+		var allLogs []*types.Log
+		for _, receipt := range receipts {
+			allLogs = append(allLogs, receipt.Logs...)
+		}
+		depositRequests, err := core.ParseDepositLogs(allLogs, chainConfig)
+		if err != nil {
+			return nil, nil, nil, NewError(ErrorEVM, fmt.Errorf("could not parse requests logs: %v", err))
+		}
+		requests = append(requests, depositRequests)
+		// create EVM for system calls
+		vmenv := vm.NewEVM(vmContext, vm.TxContext{}, statedb, chainConfig, vm.Config{})
+		// EIP-7002 withdrawals
+		requests = append(requests, core.ProcessWithdrawalQueue(vmenv, statedb))
+		// EIP-7251 consolidations
+		requests = append(requests, core.ProcessConsolidationQueue(vmenv, statedb))
+	}
+
 	// Commit block
 	root, err := statedb.Commit(vmContext.BlockNumber.Uint64(), chainConfig.IsEIP158(vmContext.BlockNumber))
 	if err != nil {
@@ -379,32 +408,14 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
 		execRs.CurrentExcessBlobGas = (*math.HexOrDecimal64)(&excessBlobGas)
 		execRs.CurrentBlobGasUsed = (*math.HexOrDecimal64)(&blobGasUsed)
 	}
-
-	var requests [][]byte
-	if chainConfig.IsPrague(vmContext.BlockNumber, vmContext.Time) {
-		// EIP-6110 deposits
-		var allLogs []*types.Log
-		for _, receipt := range receipts {
-			allLogs = append(allLogs, receipt.Logs...)
-		}
-		depositRequests, err := core.ParseDepositLogs(allLogs, chainConfig)
-		if err != nil {
-			return nil, nil, nil, NewError(ErrorEVM, fmt.Errorf("could not parse requests logs: %v", err))
-		}
-		requests = append(requests, depositRequests)
-		// create EVM for system calls
-		vmenv := vm.NewEVM(vmContext, vm.TxContext{}, statedb, chainConfig, vm.Config{})
-		// EIP-7002 withdrawals
-		withdrawalRequests := core.ProcessWithdrawalQueue(vmenv, statedb)
-		requests = append(requests, withdrawalRequests)
-		// EIP-7251 consolidations
-		consolidationRequests := core.ProcessConsolidationQueue(vmenv, statedb)
-		requests = append(requests, consolidationRequests)
-	}
 	if requests != nil {
 		// Set requestsHash on block.
 		h := types.CalcRequestsHash(requests)
 		execRs.RequestsHash = &h
+		for i := range requests {
+			// remove prefix
+			requests[i] = requests[i][1:]
+		}
 		execRs.Requests = requests
 	}