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transactions.go
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transactions.go
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package eth1
import (
"context"
"crypto/ecdsa"
"crypto/sha256"
"fmt"
"math/big"
mathRand "math/rand"
"os"
"time"
"github.com/MariusVanDerWijden/FuzzyVM/filler"
txfuzz "github.com/MariusVanDerWijden/tx-fuzz"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto/kzg4844"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/rpc"
"github.com/holiman/uint256"
"github.com/pkg/errors"
fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
"github.com/prysmaticlabs/prysm/v5/config/params"
"github.com/prysmaticlabs/prysm/v5/crypto/rand"
e2e "github.com/prysmaticlabs/prysm/v5/testing/endtoend/params"
"github.com/sirupsen/logrus"
"golang.org/x/sync/errgroup"
)
const txCount = 20
var fundedAccount *keystore.Key
type TransactionGenerator struct {
keystore string
seed int64
started chan struct{}
cancel context.CancelFunc
}
func NewTransactionGenerator(keystore string, seed int64) *TransactionGenerator {
return &TransactionGenerator{keystore: keystore, seed: seed}
}
func (t *TransactionGenerator) Start(ctx context.Context) error {
// Wrap context with a cancel func
ctx, ccl := context.WithCancel(ctx)
t.cancel = ccl
client, err := rpc.DialHTTP(fmt.Sprintf("http://127.0.0.1:%d", e2e.TestParams.Ports.Eth1RPCPort))
if err != nil {
return err
}
defer client.Close()
seed := t.seed
newGen := rand.NewDeterministicGenerator()
if seed == 0 {
seed = newGen.Int63()
logrus.Infof("Seed for transaction generator is: %d", seed)
}
// Set seed so that all transactions can be
// deterministically generated.
mathRand.Seed(seed)
keystoreBytes, err := os.ReadFile(t.keystore) // #nosec G304
if err != nil {
return err
}
mineKey, err := keystore.DecryptKey(keystoreBytes, KeystorePassword)
if err != nil {
return err
}
newKey := keystore.NewKeyForDirectICAP(newGen)
if err := fundAccount(client, mineKey, newKey); err != nil {
return err
}
fundedAccount = newKey
rnd := make([]byte, 10000)
// #nosec G404
_, err = mathRand.Read(rnd)
if err != nil {
return err
}
f := filler.NewFiller(rnd)
// Broadcast Transactions every slot
txPeriod := time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second
ticker := time.NewTicker(txPeriod)
gasPrice := big.NewInt(1e11)
for {
select {
case <-ctx.Done():
return nil
case <-ticker.C:
backend := ethclient.NewClient(client)
err = SendTransaction(client, mineKey.PrivateKey, f, gasPrice, mineKey.Address.String(), txCount, backend, false)
if err != nil {
return err
}
backend.Close()
}
}
}
// Started checks whether beacon node set is started and all nodes are ready to be queried.
func (s *TransactionGenerator) Started() <-chan struct{} {
return s.started
}
func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, f *filler.Filler, gasPrice *big.Int, addr string, N uint64, backend *ethclient.Client, al bool) error {
sender := common.HexToAddress(addr)
nonce, err := backend.PendingNonceAt(context.Background(), fundedAccount.Address)
if err != nil {
return err
}
chainid, err := backend.ChainID(context.Background())
if err != nil {
return err
}
expectedPrice, err := backend.SuggestGasPrice(context.Background())
if err != nil {
return err
}
if expectedPrice.Cmp(gasPrice) > 0 {
gasPrice = expectedPrice
}
g, _ := errgroup.WithContext(context.Background())
txs := make([]*types.Transaction, 10)
for i := uint64(0); i < 10; i++ {
index := i
g.Go(func() error {
tx, err := RandomBlobTx(client, f, fundedAccount.Address, nonce+index, gasPrice, chainid, al)
if err != nil {
logrus.WithError(err).Error("Could not create blob tx")
// In the event the transaction constructed is not valid, we continue with the routine
// rather than complete stop it.
//nolint:nilerr
return nil
}
signedTx, err := types.SignTx(tx, types.NewCancunSigner(chainid), fundedAccount.PrivateKey)
if err != nil {
logrus.WithError(err).Error("Could not sign blob tx")
// We continue on in the event there is a reason we can't sign this
// transaction(unlikely).
//nolint:nilerr
return nil
}
txs[index] = signedTx
return nil
})
}
if err := g.Wait(); err != nil {
return err
}
for _, tx := range txs {
if tx == nil {
continue
}
err = backend.SendTransaction(context.Background(), tx)
if err != nil {
// Do nothing
continue
}
}
nonce, err = backend.PendingNonceAt(context.Background(), sender)
if err != nil {
return err
}
txs = make([]*types.Transaction, N)
for i := uint64(0); i < N; i++ {
index := i
g.Go(func() error {
tx, err := txfuzz.RandomValidTx(client, f, sender, nonce+index, gasPrice, chainid, al)
if err != nil {
// In the event the transaction constructed is not valid, we continue with the routine
// rather than complete stop it.
//nolint:nilerr
return nil
}
signedTx, err := types.SignTx(tx, types.NewLondonSigner(chainid), key)
if err != nil {
// We continue on in the event there is a reason we can't sign this
// transaction(unlikely).
//nolint:nilerr
return nil
}
txs[index] = signedTx
return nil
})
}
if err := g.Wait(); err != nil {
return err
}
for _, tx := range txs {
if tx == nil {
continue
}
err = backend.SendTransaction(context.Background(), tx)
if err != nil {
// Do nothing
continue
}
}
return nil
}
// Pause pauses the component and its underlying process.
func (t *TransactionGenerator) Pause() error {
return nil
}
// Resume resumes the component and its underlying process.
func (t *TransactionGenerator) Resume() error {
return nil
}
// Stop stops the component and its underlying process.
func (t *TransactionGenerator) Stop() error {
t.cancel()
return nil
}
func RandomBlobTx(rpc *rpc.Client, f *filler.Filler, sender common.Address, nonce uint64, gasPrice, chainID *big.Int, al bool) (*types.Transaction, error) {
// Set fields if non-nil
if rpc != nil {
client := ethclient.NewClient(rpc)
var err error
if gasPrice == nil {
gasPrice, err = client.SuggestGasPrice(context.Background())
if err != nil {
gasPrice = big.NewInt(1)
}
}
if chainID == nil {
chainID, err = client.ChainID(context.Background())
if err != nil {
chainID = big.NewInt(1)
}
}
}
gas := uint64(100000)
to := randomAddress()
code := txfuzz.RandomCode(f)
value := big.NewInt(0)
if len(code) > 128 {
code = code[:128]
}
mod := 2
if al {
mod = 1
}
switch f.Byte() % byte(mod) {
case 0:
// 4844 transaction without AL
tip, feecap, err := getCaps(rpc, gasPrice)
if err != nil {
return nil, err
}
data, err := randomBlobData()
if err != nil {
return nil, err
}
return New4844Tx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, make(types.AccessList, 0)), nil
case 1:
// 4844 transaction with AL
tx := types.NewTransaction(nonce, to, value, gas, gasPrice, code)
al, err := txfuzz.CreateAccessList(rpc, tx, sender)
if err != nil {
return nil, err
}
tip, feecap, err := getCaps(rpc, gasPrice)
if err != nil {
return nil, err
}
data, err := randomBlobData()
if err != nil {
return nil, err
}
return New4844Tx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, *al), nil
}
return nil, errors.New("asdf")
}
func New4844Tx(nonce uint64, to *common.Address, gasLimit uint64, chainID, tip, feeCap, value *big.Int, code []byte, blobFeeCap *big.Int, blobData []byte, al types.AccessList) *types.Transaction {
blobs, comms, proofs, versionedHashes, err := EncodeBlobs(blobData)
if err != nil {
panic(err)
}
tx := types.NewTx(&types.BlobTx{
ChainID: uint256.MustFromBig(chainID),
Nonce: nonce,
GasTipCap: uint256.MustFromBig(tip),
GasFeeCap: uint256.MustFromBig(feeCap),
Gas: gasLimit,
To: *to,
Value: uint256.MustFromBig(value),
Data: code,
AccessList: al,
BlobFeeCap: uint256.MustFromBig(blobFeeCap),
BlobHashes: versionedHashes,
Sidecar: &types.BlobTxSidecar{
Blobs: blobs,
Commitments: comms,
Proofs: proofs,
},
})
return tx
}
func encodeBlobs(data []byte) []kzg4844.Blob {
blobs := []kzg4844.Blob{{}}
blobIndex := 0
fieldIndex := -1
numOfElems := fieldparams.BlobLength / 32
for i := 0; i < len(data); i += 31 {
fieldIndex++
if fieldIndex == numOfElems {
if blobIndex >= 1 {
break
}
blobs = append(blobs, kzg4844.Blob{})
blobIndex++
fieldIndex = 0
}
max := i + 31
if max > len(data) {
max = len(data)
}
copy(blobs[blobIndex][fieldIndex*32+1:], data[i:max])
}
return blobs
}
func EncodeBlobs(data []byte) ([]kzg4844.Blob, []kzg4844.Commitment, []kzg4844.Proof, []common.Hash, error) {
var (
blobs = encodeBlobs(data)
commits []kzg4844.Commitment
proofs []kzg4844.Proof
versionedHashes []common.Hash
)
for _, blob := range blobs {
commit, err := kzg4844.BlobToCommitment(blob)
if err != nil {
return nil, nil, nil, nil, err
}
commits = append(commits, commit)
proof, err := kzg4844.ComputeBlobProof(blob, commit)
if err != nil {
return nil, nil, nil, nil, err
}
if err := kzg4844.VerifyBlobProof(blob, commit, proof); err != nil {
return nil, nil, nil, nil, err
}
proofs = append(proofs, proof)
versionedHashes = append(versionedHashes, kZGToVersionedHash(commit))
}
return blobs, commits, proofs, versionedHashes, nil
}
var blobCommitmentVersionKZG uint8 = 0x01
// kZGToVersionedHash implements kzg_to_versioned_hash from EIP-4844
func kZGToVersionedHash(kzg kzg4844.Commitment) common.Hash {
h := sha256.Sum256(kzg[:])
h[0] = blobCommitmentVersionKZG
return h
}
func randomBlobData() ([]byte, error) {
// #nosec G404
size := mathRand.Intn(fieldparams.BlobSize)
data := make([]byte, size)
// #nosec G404
n, err := mathRand.Read(data)
if err != nil {
return nil, err
}
if n != size {
return nil, fmt.Errorf("could not create random blob data with size %d: %v", size, err)
}
return data, nil
}
func randomAddress() common.Address {
// #nosec G404
switch mathRand.Int31n(5) {
case 0, 1, 2:
b := make([]byte, 20)
// #nosec G404
_, err := mathRand.Read(b)
if err != nil {
panic(err)
}
return common.BytesToAddress(b)
case 3:
return common.Address{}
case 4:
return common.HexToAddress("0xb02A2EdA1b317FBd16760128836B0Ac59B560e9D")
}
return common.Address{}
}
func getCaps(rpc *rpc.Client, defaultGasPrice *big.Int) (*big.Int, *big.Int, error) {
if rpc == nil {
tip := new(big.Int).Mul(big.NewInt(1), big.NewInt(0).SetUint64(params.BeaconConfig().GweiPerEth))
if defaultGasPrice.Cmp(tip) >= 0 {
feeCap := new(big.Int).Sub(defaultGasPrice, tip)
return tip, feeCap, nil
}
return big.NewInt(0), defaultGasPrice, nil
}
client := ethclient.NewClient(rpc)
tip, err := client.SuggestGasTipCap(context.Background())
if err != nil {
return nil, nil, err
}
feeCap, err := client.SuggestGasPrice(context.Background())
return tip, feeCap, err
}
func fundAccount(client *rpc.Client, sourceKey, destKey *keystore.Key) error {
backend := ethclient.NewClient(client)
defer backend.Close()
nonce, err := backend.PendingNonceAt(context.Background(), sourceKey.Address)
if err != nil {
return err
}
chainid, err := backend.ChainID(context.Background())
if err != nil {
return err
}
expectedPrice, err := backend.SuggestGasPrice(context.Background())
if err != nil {
return err
}
val, ok := big.NewInt(0).SetString("10000000000000000000000000", 10)
if !ok {
return errors.New("could not set big int for value")
}
tx := types.NewTransaction(nonce, destKey.Address, val, 100000, expectedPrice, nil)
signedTx, err := types.SignTx(tx, types.NewLondonSigner(chainid), sourceKey.PrivateKey)
if err != nil {
return err
}
return backend.SendTransaction(context.Background(), signedTx)
}