plugeth/graphql/graphql_test.go

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2019-07-22 09:17:27 +00:00
// Copyright 2019 The go-ethereum Authors
GraphQL master FF for review (#18445) * Initial work on a graphql API * Added receipts, and more transaction fields. * Finish receipts, add logs * Add transactionCount to block * Add types and . * Update Block type to be compatible with ethql * Rename nonce to transactionCount in Account, to be compatible with ethql * Update transaction, receipt and log to match ethql * Add query operator, for a range of blocks * Added ommerCount to Block * Add transactionAt and ommerAt to Block * Added sendRawTransaction mutation * Add Call and EstimateGas to graphQL API * Refactored to use hexutil.Bytes instead of HexBytes * Replace BigNum with hexutil.Big * Refactor call and estimateGas to use ethapi struct type * Replace ethgraphql.Address with common.Address * Replace ethgraphql.Hash with common.Hash * Converted most quantities to Long instead of Int * Add support for logs * Fix bug in runFilter * Restructured Transaction to work primarily with headers, so uncle data is reported properly * Add gasPrice API * Add protocolVersion API * Add syncing API * Moved schema into its own source file * Move some single use args types into anonymous structs * Add doc-comments * Fixed backend fetching to use context * Added (very) basic tests * Add documentation to the graphql schema * Fix reversion for formatting of big numbers * Correct spelling error * s/BigInt/Long/ * Update common/types.go * Fixes in response to review * Fix lint error * Updated calls on private functions * Fix typo in graphql.go * Rollback ethapi breaking changes for graphql support Co-Authored-By: Arachnid <arachnid@notdot.net>
2019-01-21 14:38:13 +00:00
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package graphql
import (
"context"
"encoding/json"
"fmt"
"io"
"math/big"
"net/http"
"strings"
GraphQL master FF for review (#18445) * Initial work on a graphql API * Added receipts, and more transaction fields. * Finish receipts, add logs * Add transactionCount to block * Add types and . * Update Block type to be compatible with ethql * Rename nonce to transactionCount in Account, to be compatible with ethql * Update transaction, receipt and log to match ethql * Add query operator, for a range of blocks * Added ommerCount to Block * Add transactionAt and ommerAt to Block * Added sendRawTransaction mutation * Add Call and EstimateGas to graphQL API * Refactored to use hexutil.Bytes instead of HexBytes * Replace BigNum with hexutil.Big * Refactor call and estimateGas to use ethapi struct type * Replace ethgraphql.Address with common.Address * Replace ethgraphql.Hash with common.Hash * Converted most quantities to Long instead of Int * Add support for logs * Fix bug in runFilter * Restructured Transaction to work primarily with headers, so uncle data is reported properly * Add gasPrice API * Add protocolVersion API * Add syncing API * Moved schema into its own source file * Move some single use args types into anonymous structs * Add doc-comments * Fixed backend fetching to use context * Added (very) basic tests * Add documentation to the graphql schema * Fix reversion for formatting of big numbers * Correct spelling error * s/BigInt/Long/ * Update common/types.go * Fixes in response to review * Fix lint error * Updated calls on private functions * Fix typo in graphql.go * Rollback ethapi breaking changes for graphql support Co-Authored-By: Arachnid <arachnid@notdot.net>
2019-01-21 14:38:13 +00:00
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/eth/ethconfig"
"github.com/ethereum/go-ethereum/eth/filters"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/params"
"github.com/stretchr/testify/assert"
GraphQL master FF for review (#18445) * Initial work on a graphql API * Added receipts, and more transaction fields. * Finish receipts, add logs * Add transactionCount to block * Add types and . * Update Block type to be compatible with ethql * Rename nonce to transactionCount in Account, to be compatible with ethql * Update transaction, receipt and log to match ethql * Add query operator, for a range of blocks * Added ommerCount to Block * Add transactionAt and ommerAt to Block * Added sendRawTransaction mutation * Add Call and EstimateGas to graphQL API * Refactored to use hexutil.Bytes instead of HexBytes * Replace BigNum with hexutil.Big * Refactor call and estimateGas to use ethapi struct type * Replace ethgraphql.Address with common.Address * Replace ethgraphql.Hash with common.Hash * Converted most quantities to Long instead of Int * Add support for logs * Fix bug in runFilter * Restructured Transaction to work primarily with headers, so uncle data is reported properly * Add gasPrice API * Add protocolVersion API * Add syncing API * Moved schema into its own source file * Move some single use args types into anonymous structs * Add doc-comments * Fixed backend fetching to use context * Added (very) basic tests * Add documentation to the graphql schema * Fix reversion for formatting of big numbers * Correct spelling error * s/BigInt/Long/ * Update common/types.go * Fixes in response to review * Fix lint error * Updated calls on private functions * Fix typo in graphql.go * Rollback ethapi breaking changes for graphql support Co-Authored-By: Arachnid <arachnid@notdot.net>
2019-01-21 14:38:13 +00:00
)
func TestBuildSchema(t *testing.T) {
ddir := t.TempDir()
// Copy config
conf := node.DefaultConfig
conf.DataDir = ddir
stack, err := node.New(&conf)
if err != nil {
t.Fatalf("could not create new node: %v", err)
}
defer stack.Close()
GraphQL master FF for review (#18445) * Initial work on a graphql API * Added receipts, and more transaction fields. * Finish receipts, add logs * Add transactionCount to block * Add types and . * Update Block type to be compatible with ethql * Rename nonce to transactionCount in Account, to be compatible with ethql * Update transaction, receipt and log to match ethql * Add query operator, for a range of blocks * Added ommerCount to Block * Add transactionAt and ommerAt to Block * Added sendRawTransaction mutation * Add Call and EstimateGas to graphQL API * Refactored to use hexutil.Bytes instead of HexBytes * Replace BigNum with hexutil.Big * Refactor call and estimateGas to use ethapi struct type * Replace ethgraphql.Address with common.Address * Replace ethgraphql.Hash with common.Hash * Converted most quantities to Long instead of Int * Add support for logs * Fix bug in runFilter * Restructured Transaction to work primarily with headers, so uncle data is reported properly * Add gasPrice API * Add protocolVersion API * Add syncing API * Moved schema into its own source file * Move some single use args types into anonymous structs * Add doc-comments * Fixed backend fetching to use context * Added (very) basic tests * Add documentation to the graphql schema * Fix reversion for formatting of big numbers * Correct spelling error * s/BigInt/Long/ * Update common/types.go * Fixes in response to review * Fix lint error * Updated calls on private functions * Fix typo in graphql.go * Rollback ethapi breaking changes for graphql support Co-Authored-By: Arachnid <arachnid@notdot.net>
2019-01-21 14:38:13 +00:00
// Make sure the schema can be parsed and matched up to the object model.
if _, err := newHandler(stack, nil, nil, []string{}, []string{}); err != nil {
GraphQL master FF for review (#18445) * Initial work on a graphql API * Added receipts, and more transaction fields. * Finish receipts, add logs * Add transactionCount to block * Add types and . * Update Block type to be compatible with ethql * Rename nonce to transactionCount in Account, to be compatible with ethql * Update transaction, receipt and log to match ethql * Add query operator, for a range of blocks * Added ommerCount to Block * Add transactionAt and ommerAt to Block * Added sendRawTransaction mutation * Add Call and EstimateGas to graphQL API * Refactored to use hexutil.Bytes instead of HexBytes * Replace BigNum with hexutil.Big * Refactor call and estimateGas to use ethapi struct type * Replace ethgraphql.Address with common.Address * Replace ethgraphql.Hash with common.Hash * Converted most quantities to Long instead of Int * Add support for logs * Fix bug in runFilter * Restructured Transaction to work primarily with headers, so uncle data is reported properly * Add gasPrice API * Add protocolVersion API * Add syncing API * Moved schema into its own source file * Move some single use args types into anonymous structs * Add doc-comments * Fixed backend fetching to use context * Added (very) basic tests * Add documentation to the graphql schema * Fix reversion for formatting of big numbers * Correct spelling error * s/BigInt/Long/ * Update common/types.go * Fixes in response to review * Fix lint error * Updated calls on private functions * Fix typo in graphql.go * Rollback ethapi breaking changes for graphql support Co-Authored-By: Arachnid <arachnid@notdot.net>
2019-01-21 14:38:13 +00:00
t.Errorf("Could not construct GraphQL handler: %v", err)
}
}
// Tests that a graphQL request is successfully handled when graphql is enabled on the specified endpoint
func TestGraphQLBlockSerialization(t *testing.T) {
stack := createNode(t)
defer stack.Close()
genesis := &core.Genesis{
Config: params.AllEthashProtocolChanges,
GasLimit: 11500000,
Difficulty: big.NewInt(1048576),
}
newGQLService(t, stack, genesis, 10, func(i int, gen *core.BlockGen) {})
// start node
if err := stack.Start(); err != nil {
t.Fatalf("could not start node: %v", err)
}
for i, tt := range []struct {
body string
want string
code int
}{
{ // Should return latest block
body: `{"query": "{block{number}}","variables": null}`,
want: `{"data":{"block":{"number":"0xa"}}}`,
code: 200,
},
{ // Should return info about latest block
body: `{"query": "{block{number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":{"number":"0xa","gasUsed":"0x0","gasLimit":"0xaf79e0"}}}`,
code: 200,
},
{
body: `{"query": "{block(number:0){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":{"number":"0x0","gasUsed":"0x0","gasLimit":"0xaf79e0"}}}`,
code: 200,
},
{
body: `{"query": "{block(number:-1){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":null}}`,
code: 200,
},
{
body: `{"query": "{block(number:-500){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":null}}`,
code: 200,
},
{
body: `{"query": "{block(number:\"0\"){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":{"number":"0x0","gasUsed":"0x0","gasLimit":"0xaf79e0"}}}`,
code: 200,
},
{
body: `{"query": "{block(number:\"-33\"){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":null}}`,
code: 200,
},
{
body: `{"query": "{block(number:\"1337\"){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":null}}`,
code: 200,
},
{
body: `{"query": "{block(number:\"0x0\"){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"data":{"block":{"number":"0x0","gasUsed":"0x0","gasLimit":"0xaf79e0"}}}`,
//want: `{"errors":[{"message":"strconv.ParseInt: parsing \"0x0\": invalid syntax"}],"data":{}}`,
code: 200,
},
{
body: `{"query": "{block(number:\"a\"){number,gasUsed,gasLimit}}","variables": null}`,
want: `{"errors":[{"message":"strconv.ParseInt: parsing \"a\": invalid syntax"}],"data":{}}`,
code: 400,
},
{
body: `{"query": "{bleh{number}}","variables": null}"`,
want: `{"errors":[{"message":"Cannot query field \"bleh\" on type \"Query\".","locations":[{"line":1,"column":2}]}]}`,
code: 400,
},
// should return `estimateGas` as decimal
{
body: `{"query": "{block{ estimateGas(data:{}) }}"}`,
want: `{"data":{"block":{"estimateGas":"0xcf08"}}}`,
code: 200,
},
// should return `status` as decimal
{
body: `{"query": "{block {number call (data : {from : \"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b\", to: \"0x6295ee1b4f6dd65047762f924ecd367c17eabf8f\", data :\"0x12a7b914\"}){data status}}}"}`,
want: `{"data":{"block":{"number":"0xa","call":{"data":"0x","status":"0x1"}}}}`,
code: 200,
},
} {
resp, err := http.Post(fmt.Sprintf("%s/graphql", stack.HTTPEndpoint()), "application/json", strings.NewReader(tt.body))
if err != nil {
t.Fatalf("could not post: %v", err)
}
bodyBytes, err := io.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
t.Fatalf("could not read from response body: %v", err)
}
if have := string(bodyBytes); have != tt.want {
t.Errorf("testcase %d %s,\nhave:\n%v\nwant:\n%v", i, tt.body, have, tt.want)
}
if tt.code != resp.StatusCode {
t.Errorf("testcase %d %s,\nwrong statuscode, have: %v, want: %v", i, tt.body, resp.StatusCode, tt.code)
}
}
}
func TestGraphQLBlockSerializationEIP2718(t *testing.T) {
// Account for signing txes
var (
key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
address = crypto.PubkeyToAddress(key.PublicKey)
funds = big.NewInt(1000000000000000)
dad = common.HexToAddress("0x0000000000000000000000000000000000000dad")
)
stack := createNode(t)
defer stack.Close()
genesis := &core.Genesis{
Config: params.AllEthashProtocolChanges,
GasLimit: 11500000,
Difficulty: big.NewInt(1048576),
Alloc: core.GenesisAlloc{
address: {Balance: funds},
// The address 0xdad sloads 0x00 and 0x01
dad: {
Code: []byte{byte(vm.PC), byte(vm.PC), byte(vm.SLOAD), byte(vm.SLOAD)},
Nonce: 0,
Balance: big.NewInt(0),
},
},
BaseFee: big.NewInt(params.InitialBaseFee),
}
signer := types.LatestSigner(genesis.Config)
newGQLService(t, stack, genesis, 1, func(i int, gen *core.BlockGen) {
gen.SetCoinbase(common.Address{1})
tx, _ := types.SignNewTx(key, signer, &types.LegacyTx{
Nonce: uint64(0),
To: &dad,
Value: big.NewInt(100),
Gas: 50000,
GasPrice: big.NewInt(params.InitialBaseFee),
})
gen.AddTx(tx)
tx, _ = types.SignNewTx(key, signer, &types.AccessListTx{
ChainID: genesis.Config.ChainID,
Nonce: uint64(1),
To: &dad,
Gas: 30000,
GasPrice: big.NewInt(params.InitialBaseFee),
Value: big.NewInt(50),
AccessList: types.AccessList{{
Address: dad,
StorageKeys: []common.Hash{{0}},
}},
})
gen.AddTx(tx)
})
// start node
if err := stack.Start(); err != nil {
t.Fatalf("could not start node: %v", err)
}
for i, tt := range []struct {
body string
want string
code int
}{
{
body: `{"query": "{block {number transactions { from { address } to { address } value hash type accessList { address storageKeys } index}}}"}`,
want: `{"data":{"block":{"number":"0x1","transactions":[{"from":{"address":"0x71562b71999873db5b286df957af199ec94617f7"},"to":{"address":"0x0000000000000000000000000000000000000dad"},"value":"0x64","hash":"0xd864c9d7d37fade6b70164740540c06dd58bb9c3f6b46101908d6339db6a6a7b","type":"0x0","accessList":[],"index":"0x0"},{"from":{"address":"0x71562b71999873db5b286df957af199ec94617f7"},"to":{"address":"0x0000000000000000000000000000000000000dad"},"value":"0x32","hash":"0x19b35f8187b4e15fb59a9af469dca5dfa3cd363c11d372058c12f6482477b474","type":"0x1","accessList":[{"address":"0x0000000000000000000000000000000000000dad","storageKeys":["0x0000000000000000000000000000000000000000000000000000000000000000"]}],"index":"0x1"}]}}}`,
code: 200,
},
} {
resp, err := http.Post(fmt.Sprintf("%s/graphql", stack.HTTPEndpoint()), "application/json", strings.NewReader(tt.body))
if err != nil {
t.Fatalf("could not post: %v", err)
}
bodyBytes, err := io.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
t.Fatalf("could not read from response body: %v", err)
}
if have := string(bodyBytes); have != tt.want {
t.Errorf("testcase %d %s,\nhave:\n%v\nwant:\n%v", i, tt.body, have, tt.want)
}
if tt.code != resp.StatusCode {
t.Errorf("testcase %d %s,\nwrong statuscode, have: %v, want: %v", i, tt.body, resp.StatusCode, tt.code)
}
}
}
// Tests that a graphQL request is not handled successfully when graphql is not enabled on the specified endpoint
func TestGraphQLHTTPOnSamePort_GQLRequest_Unsuccessful(t *testing.T) {
stack := createNode(t)
defer stack.Close()
if err := stack.Start(); err != nil {
t.Fatalf("could not start node: %v", err)
}
body := strings.NewReader(`{"query": "{block{number}}","variables": null}`)
resp, err := http.Post(fmt.Sprintf("%s/graphql", stack.HTTPEndpoint()), "application/json", body)
if err != nil {
t.Fatalf("could not post: %v", err)
}
resp.Body.Close()
// make sure the request is not handled successfully
assert.Equal(t, http.StatusNotFound, resp.StatusCode)
}
func TestGraphQLConcurrentResolvers(t *testing.T) {
var (
key, _ = crypto.GenerateKey()
addr = crypto.PubkeyToAddress(key.PublicKey)
dadStr = "0x0000000000000000000000000000000000000dad"
dad = common.HexToAddress(dadStr)
genesis = &core.Genesis{
Config: params.AllEthashProtocolChanges,
GasLimit: 11500000,
Difficulty: big.NewInt(1048576),
Alloc: core.GenesisAlloc{
addr: {Balance: big.NewInt(params.Ether)},
dad: {
// LOG0(0, 0), LOG0(0, 0), RETURN(0, 0)
Code: common.Hex2Bytes("60006000a060006000a060006000f3"),
Nonce: 0,
Balance: big.NewInt(0),
},
},
}
signer = types.LatestSigner(genesis.Config)
stack = createNode(t)
)
defer stack.Close()
var tx *types.Transaction
handler, chain := newGQLService(t, stack, genesis, 1, func(i int, gen *core.BlockGen) {
tx, _ = types.SignNewTx(key, signer, &types.LegacyTx{To: &dad, Gas: 100000, GasPrice: big.NewInt(params.InitialBaseFee)})
gen.AddTx(tx)
tx, _ = types.SignNewTx(key, signer, &types.LegacyTx{To: &dad, Nonce: 1, Gas: 100000, GasPrice: big.NewInt(params.InitialBaseFee)})
gen.AddTx(tx)
tx, _ = types.SignNewTx(key, signer, &types.LegacyTx{To: &dad, Nonce: 2, Gas: 100000, GasPrice: big.NewInt(params.InitialBaseFee)})
gen.AddTx(tx)
})
// start node
if err := stack.Start(); err != nil {
t.Fatalf("could not start node: %v", err)
}
for i, tt := range []struct {
body string
want string
}{
// Multiple txes race to get/set the block hash.
{
body: "{block { transactions { logs { account { address } } } } }",
want: fmt.Sprintf(`{"block":{"transactions":[{"logs":[{"account":{"address":"%s"}},{"account":{"address":"%s"}}]},{"logs":[{"account":{"address":"%s"}},{"account":{"address":"%s"}}]},{"logs":[{"account":{"address":"%s"}},{"account":{"address":"%s"}}]}]}}`, dadStr, dadStr, dadStr, dadStr, dadStr, dadStr),
},
// Multiple fields of a tx race to resolve it. Happens in this case
// because resolving the tx body belonging to a log is delayed.
{
body: `{block { logs(filter: {}) { transaction { nonce value gasPrice }}}}`,
want: `{"block":{"logs":[{"transaction":{"nonce":"0x0","value":"0x0","gasPrice":"0x3b9aca00"}},{"transaction":{"nonce":"0x0","value":"0x0","gasPrice":"0x3b9aca00"}},{"transaction":{"nonce":"0x1","value":"0x0","gasPrice":"0x3b9aca00"}},{"transaction":{"nonce":"0x1","value":"0x0","gasPrice":"0x3b9aca00"}},{"transaction":{"nonce":"0x2","value":"0x0","gasPrice":"0x3b9aca00"}},{"transaction":{"nonce":"0x2","value":"0x0","gasPrice":"0x3b9aca00"}}]}}`,
},
// Multiple txes of a block race to set/retrieve receipts of a block.
{
body: "{block { transactions { status gasUsed } } }",
want: `{"block":{"transactions":[{"status":"0x1","gasUsed":"0x5508"},{"status":"0x1","gasUsed":"0x5508"},{"status":"0x1","gasUsed":"0x5508"}]}}`,
},
// Multiple fields of block race to resolve header and body.
{
body: "{ block { number hash gasLimit ommerCount transactionCount totalDifficulty } }",
want: fmt.Sprintf(`{"block":{"number":"0x1","hash":"%s","gasLimit":"0xaf79e0","ommerCount":"0x0","transactionCount":"0x3","totalDifficulty":"0x200000"}}`, chain[len(chain)-1].Hash()),
},
// Multiple fields of a block race to resolve the header and body.
{
body: fmt.Sprintf(`{ transaction(hash: "%s") { block { number hash gasLimit ommerCount transactionCount } } }`, tx.Hash()),
want: fmt.Sprintf(`{"transaction":{"block":{"number":"0x1","hash":"%s","gasLimit":"0xaf79e0","ommerCount":"0x0","transactionCount":"0x3"}}}`, chain[len(chain)-1].Hash()),
},
// Account fields race the resolve the state object.
{
body: fmt.Sprintf(`{ block { account(address: "%s") { balance transactionCount code } } }`, dadStr),
want: `{"block":{"account":{"balance":"0x0","transactionCount":"0x0","code":"0x60006000a060006000a060006000f3"}}}`,
},
// Test values for a non-existent account.
{
body: fmt.Sprintf(`{ block { account(address: "%s") { balance transactionCount code } } }`, "0x1111111111111111111111111111111111111111"),
want: `{"block":{"account":{"balance":"0x0","transactionCount":"0x0","code":"0x"}}}`,
},
} {
res := handler.Schema.Exec(context.Background(), tt.body, "", map[string]interface{}{})
if res.Errors != nil {
t.Fatalf("failed to execute query for testcase #%d: %v", i, res.Errors)
}
have, err := json.Marshal(res.Data)
if err != nil {
t.Fatalf("failed to encode graphql response for testcase #%d: %s", i, err)
}
if string(have) != tt.want {
t.Errorf("response unmatch for testcase #%d.\nExpected:\n%s\nGot:\n%s\n", i, tt.want, have)
}
}
}
func createNode(t *testing.T) *node.Node {
stack, err := node.New(&node.Config{
HTTPHost: "127.0.0.1",
HTTPPort: 0,
WSHost: "127.0.0.1",
WSPort: 0,
HTTPTimeouts: node.DefaultConfig.HTTPTimeouts,
})
if err != nil {
t.Fatalf("could not create node: %v", err)
}
return stack
}
func newGQLService(t *testing.T, stack *node.Node, gspec *core.Genesis, genBlocks int, genfunc func(i int, gen *core.BlockGen)) (*handler, []*types.Block) {
ethConf := &ethconfig.Config{
Genesis: gspec,
Ethash: ethash.Config{
PowMode: ethash.ModeFake,
},
NetworkId: 1337,
TrieCleanCache: 5,
TrieCleanCacheJournal: "triecache",
TrieCleanCacheRejournal: 60 * time.Minute,
TrieDirtyCache: 5,
TrieTimeout: 60 * time.Minute,
SnapshotCache: 5,
}
ethBackend, err := eth.New(stack, ethConf)
if err != nil {
t.Fatalf("could not create eth backend: %v", err)
}
// Create some blocks and import them
chain, _ := core.GenerateChain(params.AllEthashProtocolChanges, ethBackend.BlockChain().Genesis(),
ethash.NewFaker(), ethBackend.ChainDb(), genBlocks, genfunc)
_, err = ethBackend.BlockChain().InsertChain(chain)
if err != nil {
t.Fatalf("could not create import blocks: %v", err)
}
// Set up handler
filterSystem := filters.NewFilterSystem(ethBackend.APIBackend, filters.Config{})
handler, err := newHandler(stack, ethBackend.APIBackend, filterSystem, []string{}, []string{})
if err != nil {
t.Fatalf("could not create graphql service: %v", err)
}
return handler, chain
}