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package sources
import (
"context"
crand "crypto/rand"
"math/big"
"math/rand"
"testing"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum-optimism/optimism/op-node/rollup"
"github.com/ethereum-optimism/optimism/op-service/client"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum-optimism/optimism/op-service/sources/caching"
)
type mockRPC struct {
mock.Mock
}
func (m *mockRPC) BatchCallContext(ctx context.Context, b []rpc.BatchElem) error {
return m.MethodCalled("BatchCallContext", ctx, b).Get(0).([]error)[0]
}
func (m *mockRPC) CallContext(ctx context.Context, result any, method string, args ...any) error {
return m.MethodCalled("CallContext", ctx, result, method, args).Get(0).([]error)[0]
}
func (m *mockRPC) EthSubscribe(ctx context.Context, channel any, args ...any) (ethereum.Subscription, error) {
called := m.MethodCalled("EthSubscribe", channel, args)
return called.Get(0).(*rpc.ClientSubscription), called.Get(1).([]error)[0]
}
func (m *mockRPC) Close() {
m.MethodCalled("Close")
}
var _ client.RPC = (*mockRPC)(nil)
var testEthClientConfig = &EthClientConfig{
ReceiptsCacheSize: 10,
TransactionsCacheSize: 10,
HeadersCacheSize: 10,
PayloadsCacheSize: 10,
MaxRequestsPerBatch: 20,
MaxConcurrentRequests: 10,
TrustRPC: false,
MustBePostMerge: false,
RPCProviderKind: RPCKindStandard,
}
func randHash() (out common.Hash) {
_, _ = crand.Read(out[:])
return out
}
func randHeader() (*types.Header, *RPCHeader) {
hdr := &types.Header{
ParentHash: randHash(),
UncleHash: randHash(),
Coinbase: common.Address{},
Root: randHash(),
TxHash: randHash(),
ReceiptHash: randHash(),
Bloom: types.Bloom{},
Difficulty: big.NewInt(42),
Number: big.NewInt(1234),
GasLimit: 0,
GasUsed: 0,
Time: 123456,
Extra: make([]byte, 0),
MixDigest: randHash(),
Nonce: types.BlockNonce{},
BaseFee: big.NewInt(100),
}
rhdr := &RPCHeader{
ParentHash: hdr.ParentHash,
UncleHash: hdr.UncleHash,
Coinbase: hdr.Coinbase,
Root: hdr.Root,
TxHash: hdr.TxHash,
ReceiptHash: hdr.ReceiptHash,
Bloom: eth.Bytes256(hdr.Bloom),
Difficulty: *(*hexutil.Big)(hdr.Difficulty),
Number: hexutil.Uint64(hdr.Number.Uint64()),
GasLimit: hexutil.Uint64(hdr.GasLimit),
GasUsed: hexutil.Uint64(hdr.GasUsed),
Time: hexutil.Uint64(hdr.Time),
Extra: hdr.Extra,
MixDigest: hdr.MixDigest,
Nonce: hdr.Nonce,
BaseFee: (*hexutil.Big)(hdr.BaseFee),
Hash: hdr.Hash(),
}
return hdr, rhdr
}
func TestEthClient_InfoByHash(t *testing.T) {
m := new(mockRPC)
_, rhdr := randHeader()
expectedInfo, _ := rhdr.Info(true, false)
ctx := context.Background()
m.On("CallContext", ctx, new(*RPCHeader),
"eth_getBlockByHash", []any{rhdr.Hash, false}).Run(func(args mock.Arguments) {
*args[1].(**RPCHeader) = rhdr
}).Return([]error{nil})
s, err := NewEthClient(m, nil, nil, testEthClientConfig)
require.NoError(t, err)
info, err := s.InfoByHash(ctx, rhdr.Hash)
require.NoError(t, err)
require.Equal(t, info, expectedInfo)
m.Mock.AssertExpectations(t)
// Again, without expecting any calls from the mock, the cache will return the block
info, err = s.InfoByHash(ctx, rhdr.Hash)
require.NoError(t, err)
require.Equal(t, info, expectedInfo)
m.Mock.AssertExpectations(t)
}
func TestEthClient_InfoByNumber(t *testing.T) {
m := new(mockRPC)
_, rhdr := randHeader()
expectedInfo, _ := rhdr.Info(true, false)
n := rhdr.Number
ctx := context.Background()
m.On("CallContext", ctx, new(*RPCHeader),
"eth_getBlockByNumber", []any{n.String(), false}).Run(func(args mock.Arguments) {
*args[1].(**RPCHeader) = rhdr
}).Return([]error{nil})
s, err := NewL1Client(m, nil, nil, L1ClientDefaultConfig(&rollup.Config{SeqWindowSize: 10}, true, RPCKindStandard))
require.NoError(t, err)
info, err := s.InfoByNumber(ctx, uint64(n))
require.NoError(t, err)
require.Equal(t, info, expectedInfo)
m.Mock.AssertExpectations(t)
}
func TestEthClient_WrongInfoByNumber(t *testing.T) {
m := new(mockRPC)
_, rhdr := randHeader()
rhdr2 := *rhdr
rhdr2.Number += 1
n := rhdr.Number
ctx := context.Background()
m.On("CallContext", ctx, new(*RPCHeader),
"eth_getBlockByNumber", []any{n.String(), false}).Run(func(args mock.Arguments) {
*args[1].(**RPCHeader) = &rhdr2
}).Return([]error{nil})
s, err := NewL1Client(m, nil, nil, L1ClientDefaultConfig(&rollup.Config{SeqWindowSize: 10}, true, RPCKindStandard))
require.NoError(t, err)
_, err = s.InfoByNumber(ctx, uint64(n))
require.Error(t, err, "cannot accept the wrong block")
m.Mock.AssertExpectations(t)
}
func TestEthClient_WrongInfoByHash(t *testing.T) {
m := new(mockRPC)
_, rhdr := randHeader()
rhdr2 := *rhdr
rhdr2.Root[0] += 1
rhdr2.Hash = rhdr2.computeBlockHash()
k := rhdr.Hash
ctx := context.Background()
m.On("CallContext", ctx, new(*RPCHeader),
"eth_getBlockByHash", []any{k, false}).Run(func(args mock.Arguments) {
*args[1].(**RPCHeader) = &rhdr2
}).Return([]error{nil})
s, err := NewL1Client(m, nil, nil, L1ClientDefaultConfig(&rollup.Config{SeqWindowSize: 10}, true, RPCKindStandard))
require.NoError(t, err)
_, err = s.InfoByHash(ctx, k)
require.Error(t, err, "cannot accept the wrong block")
m.Mock.AssertExpectations(t)
}
func newEthClientWithCaches(metrics caching.Metrics, cacheSize int) *EthClient {
return &EthClient{
transactionsCache: caching.NewLRUCache[common.Hash, types.Transactions](metrics, "txs", cacheSize),
headersCache: caching.NewLRUCache[common.Hash, eth.BlockInfo](metrics, "headers", cacheSize),
payloadsCache: caching.NewLRUCache[common.Hash, *eth.ExecutionPayloadEnvelope](metrics, "payloads", cacheSize),
}
}
// TestReceiptValidation tests that the receipt validation is performed by the underlying RPCReceiptsFetcher
func TestReceiptValidation(t *testing.T) {
require := require.New(t)
mrpc := new(mockRPC)
rp := NewRPCReceiptsFetcher(mrpc, nil, RPCReceiptsConfig{})
const numTxs = 1
block, _ := randomRpcBlockAndReceipts(rand.New(rand.NewSource(420)), numTxs)
//txHashes := receiptTxHashes(receipts)
ctx := context.Background()
mrpc.On("CallContext",
ctx,
mock.Anything,
"eth_getTransactionReceipt",
mock.Anything).
Run(func(args mock.Arguments) {
}).
Return([]error{nil})
// when the block is requested, the block is returned
mrpc.On("CallContext",
ctx,
mock.Anything,
"eth_getBlockByHash",
mock.Anything).
Run(func(args mock.Arguments) {
*(args[1].(**RPCBlock)) = block
}).
Return([]error{nil})
ethcl := newEthClientWithCaches(nil, numTxs)
ethcl.client = mrpc
ethcl.recProvider = rp
ethcl.trustRPC = true
_, _, err := ethcl.FetchReceipts(ctx, block.Hash)
require.ErrorContains(err, "unexpected nil block number")
}