1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
package integration_tests
import (
"net/http"
"os"
"testing"
"github.com/ethereum-optimism/optimism/proxyd"
"github.com/stretchr/testify/require"
)
func TestBatching(t *testing.T) {
config := ReadConfig("batching")
chainIDResponse1 := `{"jsonrpc": "2.0", "result": "hello1", "id": 1}`
chainIDResponse2 := `{"jsonrpc": "2.0", "result": "hello2", "id": 2}`
chainIDResponse3 := `{"jsonrpc": "2.0", "result": "hello3", "id": 3}`
netVersionResponse1 := `{"jsonrpc": "2.0", "result": "1.0", "id": 1}`
callResponse1 := `{"jsonrpc": "2.0", "result": "ekans1", "id": 1}`
ethAccountsResponse2 := `{"jsonrpc": "2.0", "result": [], "id": 2}`
type mockResult struct {
method string
id string
result interface{}
}
chainIDMock1 := mockResult{"eth_chainId", "1", "hello1"}
chainIDMock2 := mockResult{"eth_chainId", "2", "hello2"}
chainIDMock3 := mockResult{"eth_chainId", "3", "hello3"}
netVersionMock1 := mockResult{"net_version", "1", "1.0"}
callMock1 := mockResult{"eth_call", "1", "ekans1"}
tests := []struct {
name string
handler http.Handler
mocks []mockResult
reqs []*proxyd.RPCReq
expectedRes string
maxUpstreamBatchSize int
numExpectedForwards int
}{
{
name: "backend returns batches out of order",
mocks: []mockResult{chainIDMock1, chainIDMock2, chainIDMock3},
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("2", "eth_chainId", nil),
NewRPCReq("3", "eth_chainId", nil),
},
expectedRes: asArray(chainIDResponse1, chainIDResponse2, chainIDResponse3),
maxUpstreamBatchSize: 2,
numExpectedForwards: 2,
},
{
// infura behavior
name: "backend returns single RPC response object as error",
handler: SingleResponseHandler(500, `{"jsonrpc":"2.0","error":{"code":-32001,"message":"internal server error"},"id":1}`),
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("2", "eth_chainId", nil),
},
expectedRes: asArray(
`{"error":{"code":-32011,"message":"no backends available for method"},"id":1,"jsonrpc":"2.0"}`,
`{"error":{"code":-32011,"message":"no backends available for method"},"id":2,"jsonrpc":"2.0"}`,
),
maxUpstreamBatchSize: 10,
numExpectedForwards: 1,
},
{
name: "backend returns single RPC response object for minibatches",
handler: SingleResponseHandler(500, `{"jsonrpc":"2.0","error":{"code":-32001,"message":"internal server error"},"id":1}`),
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("2", "eth_chainId", nil),
},
expectedRes: asArray(
`{"error":{"code":-32011,"message":"no backends available for method"},"id":1,"jsonrpc":"2.0"}`,
`{"error":{"code":-32011,"message":"no backends available for method"},"id":2,"jsonrpc":"2.0"}`,
),
maxUpstreamBatchSize: 1,
numExpectedForwards: 2,
},
{
name: "duplicate request ids are on distinct batches",
mocks: []mockResult{
netVersionMock1,
chainIDMock2,
chainIDMock1,
callMock1,
},
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "net_version", nil),
NewRPCReq("2", "eth_chainId", nil),
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("1", "eth_call", nil),
},
expectedRes: asArray(netVersionResponse1, chainIDResponse2, chainIDResponse1, callResponse1),
maxUpstreamBatchSize: 2,
numExpectedForwards: 3,
},
{
name: "over max size",
mocks: []mockResult{},
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "net_version", nil),
NewRPCReq("2", "eth_chainId", nil),
NewRPCReq("3", "eth_chainId", nil),
NewRPCReq("4", "eth_call", nil),
NewRPCReq("5", "eth_call", nil),
NewRPCReq("6", "eth_call", nil),
},
expectedRes: "{\"error\":{\"code\":-32014,\"message\":\"over batch size custom message\"},\"id\":null,\"jsonrpc\":\"2.0\"}",
maxUpstreamBatchSize: 2,
numExpectedForwards: 0,
},
{
name: "eth_accounts does not get forwarded",
mocks: []mockResult{
callMock1,
},
reqs: []*proxyd.RPCReq{
NewRPCReq("1", "eth_call", nil),
NewRPCReq("2", "eth_accounts", nil),
},
expectedRes: asArray(callResponse1, ethAccountsResponse2),
maxUpstreamBatchSize: 2,
numExpectedForwards: 1,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
config.Server.MaxUpstreamBatchSize = tt.maxUpstreamBatchSize
handler := tt.handler
if handler == nil {
router := NewBatchRPCResponseRouter()
for _, mock := range tt.mocks {
router.SetRoute(mock.method, mock.id, mock.result)
}
handler = router
}
goodBackend := NewMockBackend(handler)
defer goodBackend.Close()
require.NoError(t, os.Setenv("GOOD_BACKEND_RPC_URL", goodBackend.URL()))
client := NewProxydClient("http://127.0.0.1:8545")
_, shutdown, err := proxyd.Start(config)
require.NoError(t, err)
defer shutdown()
res, statusCode, err := client.SendBatchRPC(tt.reqs...)
require.NoError(t, err)
require.Equal(t, http.StatusOK, statusCode)
RequireEqualJSON(t, []byte(tt.expectedRes), res)
if tt.numExpectedForwards != 0 {
require.Equal(t, tt.numExpectedForwards, len(goodBackend.Requests()))
}
if handler, ok := handler.(*BatchRPCResponseRouter); ok {
for i, mock := range tt.mocks {
require.Equal(t, 1, handler.GetNumCalls(mock.method, mock.id), i)
}
}
})
}
}