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besu.go
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besu.go
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// Copyright 2019 Martin Holst Swende
// This file is part of the goevmlab library.
//
// The library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the goevmlab library. If not, see <http://www.gnu.org/licenses/>.
package evms
import (
"encoding/json"
"errors"
"fmt"
"io"
"os"
"os/exec"
"strings"
"time"
"github.com/ethereum/go-ethereum/log"
)
// BesuVM is s Evm-interface wrapper around the `evmtool` binary, based on Besu.
type BesuVM struct {
path string
name string // in case multiple instances are used
// Some metrics
stats *VmStat
}
func NewBesuVM(path, name string) *BesuVM {
return &BesuVM{
path: path,
name: name,
stats: new(VmStat),
}
}
func (evm *BesuVM) Instance(int) Evm {
return evm
}
func (evm *BesuVM) Name() string {
return evm.name
}
// RunStateTest implements the Evm interface
func (evm *BesuVM) RunStateTest(path string, out io.Writer, speedTest bool) (*tracingResult, error) {
var (
t0 = time.Now()
stdout io.ReadCloser
err error
cmd *exec.Cmd
)
if speedTest {
cmd = exec.Command(evm.path, "--nomemory", "--notime", "state-test", path)
} else {
cmd = exec.Command(evm.path, "--nomemory", "--notime", "--json", "state-test", path) // exclude memory
}
if stdout, err = cmd.StdoutPipe(); err != nil {
return &tracingResult{Cmd: cmd.String()}, err
}
if err = cmd.Start(); err != nil {
return &tracingResult{Cmd: cmd.String()}, err
}
// copy everything to the given writer
evm.Copy(out, stdout)
_, _ = io.ReadAll(stdout)
err = cmd.Wait()
// release resources
duration, slow := evm.stats.TraceDone(t0)
return &tracingResult{
Slow: slow,
ExecTime: duration,
Cmd: cmd.String()},
err
}
func (vm *BesuVM) Close() {}
func (vm *BesuVM) GetStateRoot(path string) (root, command string, err error) {
// Run without tracing
cmd := exec.Command(vm.path, "--nomemory", "--notime", "state-test", path)
data, err := cmd.Output()
if err != nil {
return "", cmd.String(), err
}
root, err = vm.ParseStateRoot(data)
if err != nil {
log.Error("Failed to find stateroot", "vm", vm.Name(), "cmd", cmd.String())
return "", cmd.String(), err
}
return root, cmd.String(), err
}
// ParseStateRoot reads the stateroot from the combined output.
func (vm *BesuVM) ParseStateRoot(data []byte) (string, error) {
start := strings.Index(string(data), `"postHash":"`)
if start > 0 {
start = start + len(`"postHash":"`)
root := string(data[start : start+2+64])
return root, nil
}
return "", errors.New("besu: no stateroot found")
}
// feed reads from the reader, does some geth-specific filtering and
// outputs items onto the channel
func (evm *BesuVM) Copy(out io.Writer, input io.Reader) {
evm.copyUntilEnd(out, input)
}
func (evm *BesuVM) copyUntilEnd(out io.Writer, input io.Reader) stateRoot {
scanner := NewJsonlScanner("besu", input, os.Stderr)
defer scanner.Release()
var stateRoot stateRoot
var elem opLog
for scanner.Next(&elem) == nil {
// If we have a stateroot, we're done
if len(elem.StateRoot2) != 0 {
stateRoot.StateRoot = elem.StateRoot2
break
}
// When geth encounters end of code, it continues anyway, on a 'virtual' STOP.
// In order to handle that, we need to drop all STOP opcodes.
if elem.Op == 0x0 {
continue
}
outp := CustomMarshal(&elem)
if _, err := out.Write(append(outp, '\n')); err != nil {
fmt.Fprintf(os.Stderr, "Error writing to out: %v\n", err)
return stateRoot
}
}
root, _ := json.Marshal(stateRoot)
if _, err := out.Write(append(root, '\n')); err != nil {
fmt.Fprintf(os.Stderr, "Error writing to out: %v\n", err)
}
return stateRoot
}
func (evm *BesuVM) Stats() []any {
return evm.stats.Stats()
}