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package testutils
import (
"crypto/ecdsa"
"math/big"
"math/rand"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
"github.com/ethereum-optimism/optimism/op-node/eth"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
func RandomHash(rng *rand.Rand) (out common.Hash) {
rng.Read(out[:])
return
}
func RandomAddress(rng *rand.Rand) (out common.Address) {
rng.Read(out[:])
return
}
func RandomETH(rng *rand.Rand, max int64) *big.Int {
x := big.NewInt(rng.Int63n(max))
x = new(big.Int).Mul(x, big.NewInt(1e18))
return x
}
func RandomKey() *ecdsa.PrivateKey {
key, err := crypto.GenerateKey()
if err != nil {
panic("couldn't generate key: " + err.Error())
}
return key
}
func RandomData(rng *rand.Rand, size int) []byte {
out := make([]byte, size)
rng.Read(out)
return out
}
func RandomBlockID(rng *rand.Rand) eth.BlockID {
return eth.BlockID{
Hash: RandomHash(rng),
Number: rng.Uint64() & ((1 << 50) - 1), // be json friendly
}
}
func RandomBlockRef(rng *rand.Rand) eth.L1BlockRef {
return eth.L1BlockRef{
Hash: RandomHash(rng),
Number: rng.Uint64(),
ParentHash: RandomHash(rng),
Time: rng.Uint64(),
}
}
func NextRandomRef(rng *rand.Rand, parent eth.L1BlockRef) eth.L1BlockRef {
return eth.L1BlockRef{
Hash: RandomHash(rng),
Number: parent.Number + 1,
ParentHash: parent.Hash,
Time: parent.Time + uint64(rng.Intn(100)),
}
}
func RandomL2BlockRef(rng *rand.Rand) eth.L2BlockRef {
return eth.L2BlockRef{
Hash: RandomHash(rng),
Number: rng.Uint64(),
ParentHash: RandomHash(rng),
Time: rng.Uint64(),
L1Origin: RandomBlockID(rng),
SequenceNumber: rng.Uint64(),
}
}
func NextRandomL2Ref(rng *rand.Rand, l2BlockTime uint64, parent eth.L2BlockRef, origin eth.BlockID) eth.L2BlockRef {
seq := parent.SequenceNumber + 1
if parent.L1Origin != origin {
seq = 0
}
return eth.L2BlockRef{
Hash: RandomHash(rng),
Number: parent.Number + 1,
ParentHash: parent.Hash,
Time: parent.Time + l2BlockTime,
L1Origin: eth.BlockID{},
SequenceNumber: seq,
}
}
func InsecureRandomKey(rng *rand.Rand) *ecdsa.PrivateKey {
key, err := ecdsa.GenerateKey(crypto.S256(), rng)
if err != nil {
panic(err)
}
return key
}
func RandomLog(rng *rand.Rand) *types.Log {
topics := make([]common.Hash, rng.Intn(3))
for i := 0; i < len(topics); i++ {
topics[i] = RandomHash(rng)
}
return &types.Log{
Address: RandomAddress(rng),
Topics: topics,
Data: RandomData(rng, rng.Intn(1000)),
BlockNumber: 0,
TxHash: common.Hash{},
TxIndex: 0,
BlockHash: common.Hash{},
Index: 0,
Removed: false,
}
}
func RandomTo(rng *rand.Rand) *common.Address {
if rng.Intn(2) == 0 {
return nil
}
to := RandomAddress(rng)
return &to
}
func RandomTx(rng *rand.Rand, baseFee *big.Int, signer types.Signer) *types.Transaction {
gas := params.TxGas + uint64(rng.Int63n(2_000_000))
key := InsecureRandomKey(rng)
tip := big.NewInt(rng.Int63n(10 * params.GWei))
tx, err := types.SignNewTx(key, signer, &types.DynamicFeeTx{
ChainID: signer.ChainID(),
Nonce: rng.Uint64(),
GasTipCap: tip,
GasFeeCap: new(big.Int).Add(baseFee, tip),
Gas: gas,
To: RandomTo(rng),
Value: RandomETH(rng, 10),
Data: RandomData(rng, rng.Intn(1000)),
AccessList: nil,
})
if err != nil {
panic(err)
}
return tx
}
func RandomReceipt(rng *rand.Rand, signer types.Signer, tx *types.Transaction, txIndex uint64, cumulativeGasUsed uint64) *types.Receipt {
gasUsed := params.TxGas + uint64(rng.Int63n(int64(tx.Gas()-params.TxGas+1)))
logs := make([]*types.Log, rng.Intn(10))
for i := range logs {
logs[i] = RandomLog(rng)
}
var contractAddr common.Address
if tx.To() == nil {
sender, err := signer.Sender(tx)
if err != nil {
panic(err)
}
contractAddr = crypto.CreateAddress(sender, tx.Nonce())
}
return &types.Receipt{
Type: tx.Type(),
Status: uint64(rng.Intn(2)),
CumulativeGasUsed: cumulativeGasUsed + gasUsed,
Bloom: types.Bloom{},
Logs: logs,
TxHash: tx.Hash(),
ContractAddress: contractAddr,
GasUsed: gasUsed,
TransactionIndex: uint(txIndex),
}
}
func RandomHeader(rng *rand.Rand) *types.Header {
return &types.Header{
ParentHash: RandomHash(rng),
UncleHash: types.EmptyUncleHash,
Coinbase: RandomAddress(rng),
Root: RandomHash(rng),
TxHash: types.EmptyRootHash,
ReceiptHash: types.EmptyRootHash,
Bloom: types.Bloom{},
Difficulty: big.NewInt(0),
Number: big.NewInt(1 + rng.Int63n(100_000_000)),
GasLimit: 0,
GasUsed: 0,
Time: uint64(rng.Int63n(2_000_000_000)),
Extra: RandomData(rng, rng.Intn(33)),
MixDigest: common.Hash{},
Nonce: types.BlockNonce{},
BaseFee: big.NewInt(rng.Int63n(300_000_000_000)),
}
}
func RandomBlock(rng *rand.Rand, txCount uint64) (*types.Block, []*types.Receipt) {
header := RandomHeader(rng)
signer := types.NewLondonSigner(big.NewInt(rng.Int63n(1000)))
txs := make([]*types.Transaction, 0, txCount)
for i := uint64(0); i < txCount; i++ {
txs = append(txs, RandomTx(rng, header.BaseFee, signer))
}
receipts := make([]*types.Receipt, 0, txCount)
cumulativeGasUsed := uint64(0)
for i, tx := range txs {
r := RandomReceipt(rng, signer, tx, uint64(i), cumulativeGasUsed)
cumulativeGasUsed += r.GasUsed
receipts = append(receipts, r)
}
header.GasUsed = cumulativeGasUsed
header.GasLimit = cumulativeGasUsed + uint64(rng.Int63n(int64(cumulativeGasUsed)))
block := types.NewBlock(header, txs, nil, receipts, trie.NewStackTrie(nil))
logIndex := uint(0)
for i, r := range receipts {
r.BlockHash = block.Hash()
r.BlockNumber = block.Number()
for _, l := range r.Logs {
l.BlockHash = block.Hash()
l.BlockNumber = block.NumberU64()
l.TxIndex = uint(i)
l.TxHash = txs[i].Hash()
l.Index = logIndex
logIndex += 1
}
}
return block, receipts
}