plugeth/cmd/geth/verkle.go

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// Copyright 2022 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"encoding/hex"
"errors"
"fmt"
"os"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/internal/flags"
"github.com/ethereum/go-ethereum/log"
"github.com/gballet/go-verkle"
cli "github.com/urfave/cli/v2"
)
var (
zero [32]byte
verkleCommand = &cli.Command{
Name: "verkle",
Usage: "A set of experimental verkle tree management commands",
Description: "",
Subcommands: []*cli.Command{
{
Name: "verify",
Usage: "verify the conversion of a MPT into a verkle tree",
ArgsUsage: "<root>",
Action: verifyVerkle,
Flags: flags.Merge(utils.NetworkFlags, utils.DatabasePathFlags),
Description: `
geth verkle verify <state-root>
This command takes a root commitment and attempts to rebuild the tree.
`,
},
{
Name: "dump",
Usage: "Dump a verkle tree to a DOT file",
ArgsUsage: "<root> <key1> [<key 2> ...]",
Action: expandVerkle,
Flags: flags.Merge(utils.NetworkFlags, utils.DatabasePathFlags),
Description: `
geth verkle dump <state-root> <key 1> [<key 2> ...]
This command will produce a dot file representing the tree, rooted at <root>.
in which key1, key2, ... are expanded.
`,
},
},
}
)
// recurse into each child to ensure they can be loaded from the db. The tree isn't rebuilt
// (only its nodes are loaded) so there is no need to flush them, the garbage collector should
// take care of that for us.
func checkChildren(root verkle.VerkleNode, resolver verkle.NodeResolverFn) error {
switch node := root.(type) {
case *verkle.InternalNode:
for i, child := range node.Children() {
childC := child.ComputeCommitment().Bytes()
childS, err := resolver(childC[:])
if bytes.Equal(childC[:], zero[:]) {
continue
}
if err != nil {
return fmt.Errorf("could not find child %x in db: %w", childC, err)
}
// depth is set to 0, the tree isn't rebuilt so it's not a problem
childN, err := verkle.ParseNode(childS, 0, childC[:])
if err != nil {
return fmt.Errorf("decode error child %x in db: %w", child.ComputeCommitment().Bytes(), err)
}
if err := checkChildren(childN, resolver); err != nil {
return fmt.Errorf("%x%w", i, err) // write the path to the erroring node
}
}
case *verkle.LeafNode:
// sanity check: ensure at least one value is non-zero
for i := 0; i < verkle.NodeWidth; i++ {
if len(node.Value(i)) != 0 {
return nil
}
}
return fmt.Errorf("Both balance and nonce are 0")
case verkle.Empty:
// nothing to do
default:
return fmt.Errorf("unsupported type encountered %v", root)
}
return nil
}
func verifyVerkle(ctx *cli.Context) error {
stack, _ := makeConfigNode(ctx)
defer stack.Close()
chaindb := utils.MakeChainDatabase(ctx, stack, true)
headBlock := rawdb.ReadHeadBlock(chaindb)
if headBlock == nil {
log.Error("Failed to load head block")
return errors.New("no head block")
}
if ctx.NArg() > 1 {
log.Error("Too many arguments given")
return errors.New("too many arguments")
}
var (
rootC common.Hash
err error
)
if ctx.NArg() == 1 {
rootC, err = parseRoot(ctx.Args().First())
if err != nil {
log.Error("Failed to resolve state root", "error", err)
return err
}
log.Info("Rebuilding the tree", "root", rootC)
} else {
rootC = headBlock.Root()
log.Info("Rebuilding the tree", "root", rootC, "number", headBlock.NumberU64())
}
serializedRoot, err := chaindb.Get(rootC[:])
if err != nil {
return err
}
root, err := verkle.ParseNode(serializedRoot, 0, rootC[:])
if err != nil {
return err
}
if err := checkChildren(root, chaindb.Get); err != nil {
log.Error("Could not rebuild the tree from the database", "err", err)
return err
}
log.Info("Tree was rebuilt from the database")
return nil
}
func expandVerkle(ctx *cli.Context) error {
stack, _ := makeConfigNode(ctx)
defer stack.Close()
chaindb := utils.MakeChainDatabase(ctx, stack, true)
var (
rootC common.Hash
keylist [][]byte
err error
)
if ctx.NArg() >= 2 {
rootC, err = parseRoot(ctx.Args().First())
if err != nil {
log.Error("Failed to resolve state root", "error", err)
return err
}
keylist = make([][]byte, 0, ctx.Args().Len()-1)
args := ctx.Args().Slice()
for i := range args[1:] {
key, err := hex.DecodeString(args[i+1])
log.Info("decoded key", "arg", args[i+1], "key", key)
if err != nil {
return fmt.Errorf("error decoding key #%d: %w", i+1, err)
}
keylist = append(keylist, key)
}
log.Info("Rebuilding the tree", "root", rootC)
} else {
return fmt.Errorf("usage: %s root key1 [key 2...]", ctx.App.Name)
}
serializedRoot, err := chaindb.Get(rootC[:])
if err != nil {
return err
}
root, err := verkle.ParseNode(serializedRoot, 0, rootC[:])
if err != nil {
return err
}
for i, key := range keylist {
log.Info("Reading key", "index", i, "key", keylist[0])
root.Get(key, chaindb.Get)
}
if err := os.WriteFile("dump.dot", []byte(verkle.ToDot(root)), 0600); err != nil {
log.Error("Failed to dump file", "err", err)
} else {
log.Info("Tree was dumped to file", "file", "dump.dot")
}
return nil
}