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package integration_tests
import (
"bytes"
"fmt"
"os"
"testing"
"time"
"github.com/alicebob/miniredis"
"github.com/ethereum-optimism/optimism/proxyd"
"github.com/stretchr/testify/require"
)
func TestCaching(t *testing.T) {
redis, err := miniredis.Run()
require.NoError(t, err)
defer redis.Close()
hdlr := NewBatchRPCResponseRouter()
/* cacheable */
hdlr.SetRoute("eth_chainId", "999", "0x420")
hdlr.SetRoute("net_version", "999", "0x1234")
hdlr.SetRoute("eth_getBlockTransactionCountByHash", "999", "eth_getBlockTransactionCountByHash")
hdlr.SetRoute("eth_getBlockByHash", "999", "eth_getBlockByHash")
hdlr.SetRoute("eth_getTransactionByHash", "999", "eth_getTransactionByHash")
hdlr.SetRoute("eth_getTransactionByBlockHashAndIndex", "999", "eth_getTransactionByBlockHashAndIndex")
hdlr.SetRoute("eth_getUncleByBlockHashAndIndex", "999", "eth_getUncleByBlockHashAndIndex")
hdlr.SetRoute("eth_getTransactionReceipt", "999", "eth_getTransactionReceipt")
/* not cacheable */
hdlr.SetRoute("eth_getBlockByNumber", "999", "eth_getBlockByNumber")
hdlr.SetRoute("eth_blockNumber", "999", "eth_blockNumber")
hdlr.SetRoute("eth_call", "999", "eth_call")
backend := NewMockBackend(hdlr)
defer backend.Close()
require.NoError(t, os.Setenv("GOOD_BACKEND_RPC_URL", backend.URL()))
require.NoError(t, os.Setenv("REDIS_URL", fmt.Sprintf("redis://127.0.0.1:%s", redis.Port())))
config := ReadConfig("caching")
client := NewProxydClient("http://127.0.0.1:8545")
_, shutdown, err := proxyd.Start(config)
require.NoError(t, err)
defer shutdown()
// allow time for the block number fetcher to fire
time.Sleep(1500 * time.Millisecond)
tests := []struct {
method string
params []interface{}
response string
backendCalls int
}{
/* cacheable */
{
"eth_chainId",
nil,
"{\"jsonrpc\": \"2.0\", \"result\": \"0x420\", \"id\": 999}",
1,
},
{
"net_version",
nil,
"{\"jsonrpc\": \"2.0\", \"result\": \"0x1234\", \"id\": 999}",
1,
},
{
"eth_getBlockTransactionCountByHash",
[]interface{}{"0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getBlockTransactionCountByHash\", \"id\": 999}",
1,
},
{
"eth_getBlockByHash",
[]interface{}{"0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "false"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getBlockByHash\", \"id\": 999}",
1,
},
{
"eth_getTransactionByBlockHashAndIndex",
[]interface{}{"0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", "0x55"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getTransactionByBlockHashAndIndex\", \"id\": 999}",
1,
},
{
"eth_getUncleByBlockHashAndIndex",
[]interface{}{"0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238", "0x90"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getUncleByBlockHashAndIndex\", \"id\": 999}",
1,
},
/* not cacheable */
{
"eth_getBlockByNumber",
[]interface{}{
"0x1",
true,
},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getBlockByNumber\", \"id\": 999}",
2,
},
{
"eth_getTransactionReceipt",
[]interface{}{"0x85d995eba9763907fdf35cd2034144dd9d53ce32cbec21349d4b12823c6860c5"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getTransactionReceipt\", \"id\": 999}",
2,
},
{
"eth_getTransactionByHash",
[]interface{}{"0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_getTransactionByHash\", \"id\": 999}",
2,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"0x60",
},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_call\", \"id\": 999}",
2,
},
{
"eth_blockNumber",
nil,
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_blockNumber\", \"id\": 999}",
2,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"latest",
},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_call\", \"id\": 999}",
2,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"pending",
},
"{\"jsonrpc\": \"2.0\", \"result\": \"eth_call\", \"id\": 999}",
2,
},
}
for _, tt := range tests {
t.Run(tt.method, func(t *testing.T) {
resRaw, _, err := client.SendRPC(tt.method, tt.params)
require.NoError(t, err)
resCache, _, err := client.SendRPC(tt.method, tt.params)
require.NoError(t, err)
RequireEqualJSON(t, []byte(tt.response), resCache)
RequireEqualJSON(t, resRaw, resCache)
require.Equal(t, tt.backendCalls, countRequests(backend, tt.method))
backend.Reset()
})
}
t.Run("nil responses should not be cached", func(t *testing.T) {
hdlr.SetRoute("eth_getBlockByHash", "999", nil)
resRaw, _, err := client.SendRPC("eth_getBlockByHash", []interface{}{"0x123"})
require.NoError(t, err)
resCache, _, err := client.SendRPC("eth_getBlockByHash", []interface{}{"0x123"})
require.NoError(t, err)
RequireEqualJSON(t, []byte("{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":null}"), resRaw)
RequireEqualJSON(t, resRaw, resCache)
require.Equal(t, 2, countRequests(backend, "eth_getBlockByHash"))
})
}
func TestBatchCaching(t *testing.T) {
redis, err := miniredis.Run()
require.NoError(t, err)
defer redis.Close()
hdlr := NewBatchRPCResponseRouter()
hdlr.SetRoute("eth_chainId", "1", "0x420")
hdlr.SetRoute("net_version", "1", "0x1234")
hdlr.SetRoute("eth_call", "1", "dummy_call")
hdlr.SetRoute("eth_getBlockByHash", "1", "eth_getBlockByHash")
backend := NewMockBackend(hdlr)
defer backend.Close()
require.NoError(t, os.Setenv("GOOD_BACKEND_RPC_URL", backend.URL()))
require.NoError(t, os.Setenv("REDIS_URL", fmt.Sprintf("redis://127.0.0.1:%s", redis.Port())))
config := ReadConfig("caching")
client := NewProxydClient("http://127.0.0.1:8545")
_, shutdown, err := proxyd.Start(config)
require.NoError(t, err)
defer shutdown()
// allow time for the block number fetcher to fire
time.Sleep(1500 * time.Millisecond)
goodChainIdResponse := "{\"jsonrpc\": \"2.0\", \"result\": \"0x420\", \"id\": 1}"
goodNetVersionResponse := "{\"jsonrpc\": \"2.0\", \"result\": \"0x1234\", \"id\": 1}"
goodEthCallResponse := "{\"jsonrpc\": \"2.0\", \"result\": \"dummy_call\", \"id\": 1}"
goodEthGetBlockByHash := "{\"jsonrpc\": \"2.0\", \"result\": \"eth_getBlockByHash\", \"id\": 1}"
res, _, err := client.SendBatchRPC(
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("1", "net_version", nil),
NewRPCReq("1", "eth_getBlockByHash", []interface{}{"0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "false"}),
)
require.NoError(t, err)
RequireEqualJSON(t, []byte(asArray(goodChainIdResponse, goodNetVersionResponse, goodEthGetBlockByHash)), res)
require.Equal(t, 1, countRequests(backend, "eth_chainId"))
require.Equal(t, 1, countRequests(backend, "net_version"))
require.Equal(t, 1, countRequests(backend, "eth_getBlockByHash"))
backend.Reset()
res, _, err = client.SendBatchRPC(
NewRPCReq("1", "eth_chainId", nil),
NewRPCReq("1", "eth_call", []interface{}{`{"to":"0x1234"}`, "pending"}),
NewRPCReq("1", "net_version", nil),
NewRPCReq("1", "eth_getBlockByHash", []interface{}{"0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "false"}),
)
require.NoError(t, err)
RequireEqualJSON(t, []byte(asArray(goodChainIdResponse, goodEthCallResponse, goodNetVersionResponse, goodEthGetBlockByHash)), res)
require.Equal(t, 0, countRequests(backend, "eth_chainId"))
require.Equal(t, 0, countRequests(backend, "net_version"))
require.Equal(t, 0, countRequests(backend, "eth_getBlockByHash"))
require.Equal(t, 1, countRequests(backend, "eth_call"))
}
func countRequests(backend *MockBackend, name string) int {
var count int
for _, req := range backend.Requests() {
if bytes.Contains(req.Body, []byte(name)) {
count++
}
}
return count
}