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graphql service on top of rpc endpoints

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This commit is contained in:
Ian Norden 2020-10-26 11:02:32 -05:00
parent 4f4ab1dd4f
commit a8dd77294a
8 changed files with 1489 additions and 1 deletions
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1
go.mod
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@ -4,6 +4,7 @@ go 1.13
require (
github.com/ethereum/go-ethereum v1.9.11
github.com/graph-gophers/graphql-go v0.0.0-20201003130358-c5bdf3b1108e // indirect
github.com/ipfs/go-block-format v0.0.2
github.com/ipfs/go-cid v0.0.5
github.com/ipfs/go-ipfs-blockstore v1.0.0

2
go.sum
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@ -224,6 +224,8 @@ github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/ad
github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/graph-gophers/graphql-go v0.0.0-20191115155744-f33e81362277/go.mod h1:9CQHMSxwO4MprSdzoIEobiHpoLtHm77vfxsvsIN5Vuc=
github.com/graph-gophers/graphql-go v0.0.0-20201003130358-c5bdf3b1108e h1:IpssFbpfPSx/3c7x601Npx+UOQ4tqd0Rk4sObCQ+zlQ=
github.com/graph-gophers/graphql-go v0.0.0-20201003130358-c5bdf3b1108e/go.mod h1:9CQHMSxwO4MprSdzoIEobiHpoLtHm77vfxsvsIN5Vuc=
github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=

120
pkg/graphql/graphiql.go Normal file
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@ -0,0 +1,120 @@
// The MIT License (MIT)
//
// Copyright (c) 2016 Muhammed Thanish
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package graphql
import (
"bytes"
"fmt"
"net/http"
)
// GraphiQL is an in-browser IDE for exploring GraphiQL APIs.
// This handler returns GraphiQL when requested.
//
// For more information, see https://github.com/graphql/graphiql.
type GraphiQL struct{}
func respond(w http.ResponseWriter, body []byte, code int) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("X-Content-Type-Options", "nosniff")
w.WriteHeader(code)
_, _ = w.Write(body)
}
func errorJSON(msg string) []byte {
buf := bytes.Buffer{}
fmt.Fprintf(&buf, `{"error": "%s"}`, msg)
return buf.Bytes()
}
func (h GraphiQL) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
respond(w, errorJSON("only GET requests are supported"), http.StatusMethodNotAllowed)
return
}
w.Header().Set("Content-Type", "text/html")
w.Write(graphiql)
}
var graphiql = []byte(`
<!DOCTYPE html>
<html>
<head>
<link
rel="icon"
type="image/png"
href="data:image/png;base64,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"
/>
<link
rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.13.0/graphiql.css"
integrity="sha384-Qua2xoKBxcHOg1ivsKWo98zSI5KD/UuBpzMIg8coBd4/jGYoxeozCYFI9fesatT0"
crossorigin="anonymous"
/>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/fetch/3.0.0/fetch.min.js"
integrity="sha384-5B8/4F9AQqp/HCHReGLSOWbyAOwnJsPrvx6C0+VPUr44Olzi99zYT1xbVh+ZanQJ"
crossorigin="anonymous"
></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.5/umd/react.production.min.js"
integrity="sha384-dOCiLz3nZfHiJj//EWxjwSKSC6Z1IJtyIEK/b/xlHVNdVLXDYSesoxiZb94bbuGE"
crossorigin="anonymous"
></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.5/umd/react-dom.production.min.js"
integrity="sha384-QI+ql5f+khgo3mMdCktQ3E7wUKbIpuQo8S5rA/3i1jg2rMsloCNyiZclI7sFQUGN"
crossorigin="anonymous"
></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.13.0/graphiql.min.js"
integrity="sha384-roSmzNmO4zJK9X4lwggDi4/oVy+9V4nlS1+MN8Taj7tftJy1GvMWyAhTNXdC/fFR"
crossorigin="anonymous"
></script>
</head>
<body style="width: 100%; height: 100%; margin: 0; overflow: hidden;">
<div id="graphiql" style="height: 100vh;">Loading...</div>
<script>
function fetchGQL(params) {
return fetch("/graphql", {
method: "post",
body: JSON.stringify(params),
credentials: "include",
}).then(function (resp) {
return resp.text();
}).then(function (body) {
try {
return JSON.parse(body);
} catch (error) {
return body;
}
});
}
ReactDOM.render(
React.createElement(GraphiQL, {fetcher: fetchGQL}),
document.getElementById("graphiql")
)
</script>
</body>
</html>
`)

942
pkg/graphql/graphql.go Normal file
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@ -0,0 +1,942 @@
// Copyright 2019 The go-ethereum Authors
// 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 provides a GraphQL interface to Ethereum node data.
package graphql
import (
"context"
"errors"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/filters"
"github.com/ethereum/go-ethereum/rpc"
"github.com/vulcanize/ipld-eth-server/pkg/eth"
)
var (
errBlockInvariant = errors.New("block objects must be instantiated with at least one of num or hash")
)
// Account represents an Ethereum account at a particular block.
type Account struct {
backend *eth.Backend
address common.Address
blockNrOrHash rpc.BlockNumberOrHash
}
// getState fetches the StateDB object for an account.
func (a *Account) getState(ctx context.Context) (*state.StateDB, error) {
state, _, err := a.backend.StateAndHeaderByNumberOrHash(ctx, a.blockNrOrHash)
return state, err
}
func (a *Account) Address(ctx context.Context) (common.Address, error) {
return a.address, nil
}
func (a *Account) Balance(ctx context.Context) (hexutil.Big, error) {
state, err := a.getState(ctx)
if err != nil {
return hexutil.Big{}, err
}
return hexutil.Big(*state.GetBalance(a.address)), nil
}
func (a *Account) TransactionCount(ctx context.Context) (hexutil.Uint64, error) {
state, err := a.getState(ctx)
if err != nil {
return 0, err
}
return hexutil.Uint64(state.GetNonce(a.address)), nil
}
func (a *Account) Code(ctx context.Context) (hexutil.Bytes, error) {
state, err := a.getState(ctx)
if err != nil {
return hexutil.Bytes{}, err
}
return hexutil.Bytes(state.GetCode(a.address)), nil
}
func (a *Account) Storage(ctx context.Context, args struct{ Slot common.Hash }) (common.Hash, error) {
state, err := a.getState(ctx)
if err != nil {
return common.Hash{}, err
}
return state.GetState(a.address, args.Slot), nil
}
// Log represents an individual log message. All arguments are mandatory.
type Log struct {
backend *eth.Backend
transaction *Transaction
log *types.Log
}
func (l *Log) Transaction(ctx context.Context) *Transaction {
return l.transaction
}
func (l *Log) Account(ctx context.Context, args BlockNumberArgs) *Account {
return &Account{
backend: l.backend,
address: l.log.Address,
blockNrOrHash: args.NumberOrLatest(),
}
}
func (l *Log) Index(ctx context.Context) int32 {
return int32(l.log.Index)
}
func (l *Log) Topics(ctx context.Context) []common.Hash {
return l.log.Topics
}
func (l *Log) Data(ctx context.Context) hexutil.Bytes {
return hexutil.Bytes(l.log.Data)
}
// Transaction represents an Ethereum transaction.
// backend and hash are mandatory; all others will be fetched when required.
type Transaction struct {
backend *eth.Backend
hash common.Hash
tx *types.Transaction
block *Block
index uint64
}
// resolve returns the internal transaction object, fetching it if needed.
func (t *Transaction) resolve(ctx context.Context) (*types.Transaction, error) {
if t.tx == nil {
tx, blockHash, _, index := rawdb.ReadTransaction(t.backend.ChainDb(), t.hash)
if tx != nil {
t.tx = tx
blockNrOrHash := rpc.BlockNumberOrHashWithHash(blockHash, false)
t.block = &Block{
backend: t.backend,
numberOrHash: &blockNrOrHash,
}
t.index = index
}
}
return t.tx, nil
}
func (t *Transaction) Hash(ctx context.Context) common.Hash {
return t.hash
}
func (t *Transaction) InputData(ctx context.Context) (hexutil.Bytes, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Bytes{}, err
}
return hexutil.Bytes(tx.Data()), nil
}
func (t *Transaction) Gas(ctx context.Context) (hexutil.Uint64, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return 0, err
}
return hexutil.Uint64(tx.Gas()), nil
}
func (t *Transaction) GasPrice(ctx context.Context) (hexutil.Big, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Big{}, err
}
return hexutil.Big(*tx.GasPrice()), nil
}
func (t *Transaction) Value(ctx context.Context) (hexutil.Big, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Big{}, err
}
return hexutil.Big(*tx.Value()), nil
}
func (t *Transaction) Nonce(ctx context.Context) (hexutil.Uint64, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return 0, err
}
return hexutil.Uint64(tx.Nonce()), nil
}
func (t *Transaction) To(ctx context.Context, args BlockNumberArgs) (*Account, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return nil, err
}
to := tx.To()
if to == nil {
return nil, nil
}
return &Account{
backend: t.backend,
address: *to,
blockNrOrHash: args.NumberOrLatest(),
}, nil
}
func (t *Transaction) From(ctx context.Context, args BlockNumberArgs) (*Account, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return nil, err
}
var signer types.Signer = types.HomesteadSigner{}
if tx.Protected() {
signer = types.NewEIP155Signer(tx.ChainId())
}
from, _ := types.Sender(signer, tx)
return &Account{
backend: t.backend,
address: from,
blockNrOrHash: args.NumberOrLatest(),
}, nil
}
func (t *Transaction) Block(ctx context.Context) (*Block, error) {
if _, err := t.resolve(ctx); err != nil {
return nil, err
}
return t.block, nil
}
func (t *Transaction) Index(ctx context.Context) (*int32, error) {
if _, err := t.resolve(ctx); err != nil {
return nil, err
}
if t.block == nil {
return nil, nil
}
index := int32(t.index)
return &index, nil
}
// getReceipt returns the receipt associated with this transaction, if any.
func (t *Transaction) getReceipt(ctx context.Context) (*types.Receipt, error) {
if _, err := t.resolve(ctx); err != nil {
return nil, err
}
if t.block == nil {
return nil, nil
}
receipts, err := t.block.resolveReceipts(ctx)
if err != nil {
return nil, err
}
return receipts[t.index], nil
}
func (t *Transaction) Status(ctx context.Context) (*hexutil.Uint64, error) {
receipt, err := t.getReceipt(ctx)
if err != nil || receipt == nil {
return nil, err
}
ret := hexutil.Uint64(receipt.Status)
return &ret, nil
}
func (t *Transaction) GasUsed(ctx context.Context) (*hexutil.Uint64, error) {
receipt, err := t.getReceipt(ctx)
if err != nil || receipt == nil {
return nil, err
}
ret := hexutil.Uint64(receipt.GasUsed)
return &ret, nil
}
func (t *Transaction) CumulativeGasUsed(ctx context.Context) (*hexutil.Uint64, error) {
receipt, err := t.getReceipt(ctx)
if err != nil || receipt == nil {
return nil, err
}
ret := hexutil.Uint64(receipt.CumulativeGasUsed)
return &ret, nil
}
func (t *Transaction) CreatedContract(ctx context.Context, args BlockNumberArgs) (*Account, error) {
receipt, err := t.getReceipt(ctx)
if err != nil || receipt == nil || receipt.ContractAddress == (common.Address{}) {
return nil, err
}
return &Account{
backend: t.backend,
address: receipt.ContractAddress,
blockNrOrHash: args.NumberOrLatest(),
}, nil
}
func (t *Transaction) Logs(ctx context.Context) (*[]*Log, error) {
receipt, err := t.getReceipt(ctx)
if err != nil || receipt == nil {
return nil, err
}
ret := make([]*Log, 0, len(receipt.Logs))
for _, log := range receipt.Logs {
ret = append(ret, &Log{
backend: t.backend,
transaction: t,
log: log,
})
}
return &ret, nil
}
func (t *Transaction) R(ctx context.Context) (hexutil.Big, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Big{}, err
}
_, r, _ := tx.RawSignatureValues()
return hexutil.Big(*r), nil
}
func (t *Transaction) S(ctx context.Context) (hexutil.Big, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Big{}, err
}
_, _, s := tx.RawSignatureValues()
return hexutil.Big(*s), nil
}
func (t *Transaction) V(ctx context.Context) (hexutil.Big, error) {
tx, err := t.resolve(ctx)
if err != nil || tx == nil {
return hexutil.Big{}, err
}
v, _, _ := tx.RawSignatureValues()
return hexutil.Big(*v), nil
}
type BlockType int
// Block represents an Ethereum block.
// backend, and numberOrHash are mandatory. All other fields are lazily fetched
// when required.
type Block struct {
backend *eth.Backend
numberOrHash *rpc.BlockNumberOrHash
hash common.Hash
header *types.Header
block *types.Block
receipts []*types.Receipt
}
// resolve returns the internal Block object representing this block, fetching
// it if necessary.
func (b *Block) resolve(ctx context.Context) (*types.Block, error) {
if b.block != nil {
return b.block, nil
}
if b.numberOrHash == nil {
latest := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
b.numberOrHash = &latest
}
var err error
b.block, err = b.backend.BlockByNumberOrHash(ctx, *b.numberOrHash)
if b.block != nil && b.header == nil {
b.header = b.block.Header()
if hash, ok := b.numberOrHash.Hash(); ok {
b.hash = hash
}
}
return b.block, err
}
// resolveHeader returns the internal Header object for this block, fetching it
// if necessary. Call this function instead of `resolve` unless you need the
// additional data (transactions and uncles).
func (b *Block) resolveHeader(ctx context.Context) (*types.Header, error) {
if b.numberOrHash == nil && b.hash == (common.Hash{}) {
return nil, errBlockInvariant
}
var err error
if b.header == nil {
if b.hash != (common.Hash{}) {
b.header, err = b.backend.HeaderByHash(ctx, b.hash)
} else {
b.header, err = b.backend.HeaderByNumberOrHash(ctx, *b.numberOrHash)
}
}
return b.header, err
}
// resolveReceipts returns the list of receipts for this block, fetching them
// if necessary.
func (b *Block) resolveReceipts(ctx context.Context) ([]*types.Receipt, error) {
if b.receipts == nil {
hash := b.hash
if hash == (common.Hash{}) {
header, err := b.resolveHeader(ctx)
if err != nil {
return nil, err
}
hash = header.Hash()
}
receipts, err := b.backend.GetReceipts(ctx, hash)
if err != nil {
return nil, err
}
b.receipts = []*types.Receipt(receipts)
}
return b.receipts, nil
}
func (b *Block) Number(ctx context.Context) (hexutil.Uint64, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return 0, err
}
return hexutil.Uint64(header.Number.Uint64()), nil
}
func (b *Block) Hash(ctx context.Context) (common.Hash, error) {
if b.hash == (common.Hash{}) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
b.hash = header.Hash()
}
return b.hash, nil
}
func (b *Block) GasLimit(ctx context.Context) (hexutil.Uint64, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return 0, err
}
return hexutil.Uint64(header.GasLimit), nil
}
func (b *Block) GasUsed(ctx context.Context) (hexutil.Uint64, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return 0, err
}
return hexutil.Uint64(header.GasUsed), nil
}
func (b *Block) Parent(ctx context.Context) (*Block, error) {
// If the block header hasn't been fetched, and we'll need it, fetch it.
if b.numberOrHash == nil && b.header == nil {
if _, err := b.resolveHeader(ctx); err != nil {
return nil, err
}
}
if b.header != nil && b.header.Number.Uint64() > 0 {
num := rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(b.header.Number.Uint64() - 1))
return &Block{
backend: b.backend,
numberOrHash: &num,
hash: b.header.ParentHash,
}, nil
}
return nil, nil
}
func (b *Block) Difficulty(ctx context.Context) (hexutil.Big, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return hexutil.Big{}, err
}
return hexutil.Big(*header.Difficulty), nil
}
func (b *Block) Timestamp(ctx context.Context) (hexutil.Uint64, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return 0, err
}
return hexutil.Uint64(header.Time), nil
}
func (b *Block) Nonce(ctx context.Context) (hexutil.Bytes, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return hexutil.Bytes{}, err
}
return hexutil.Bytes(header.Nonce[:]), nil
}
func (b *Block) MixHash(ctx context.Context) (common.Hash, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
return header.MixDigest, nil
}
func (b *Block) TransactionsRoot(ctx context.Context) (common.Hash, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
return header.TxHash, nil
}
func (b *Block) StateRoot(ctx context.Context) (common.Hash, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
return header.Root, nil
}
func (b *Block) ReceiptsRoot(ctx context.Context) (common.Hash, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
return header.ReceiptHash, nil
}
func (b *Block) OmmerHash(ctx context.Context) (common.Hash, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return common.Hash{}, err
}
return header.UncleHash, nil
}
func (b *Block) OmmerCount(ctx context.Context) (*int32, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
count := int32(len(block.Uncles()))
return &count, err
}
func (b *Block) Ommers(ctx context.Context) (*[]*Block, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
ret := make([]*Block, 0, len(block.Uncles()))
for _, uncle := range block.Uncles() {
blockNumberOrHash := rpc.BlockNumberOrHashWithHash(uncle.Hash(), false)
ret = append(ret, &Block{
backend: b.backend,
numberOrHash: &blockNumberOrHash,
header: uncle,
})
}
return &ret, nil
}
func (b *Block) ExtraData(ctx context.Context) (hexutil.Bytes, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return hexutil.Bytes{}, err
}
return hexutil.Bytes(header.Extra), nil
}
func (b *Block) LogsBloom(ctx context.Context) (hexutil.Bytes, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return hexutil.Bytes{}, err
}
return hexutil.Bytes(header.Bloom.Bytes()), nil
}
func (b *Block) TotalDifficulty(ctx context.Context) (hexutil.Big, error) {
h := b.hash
if h == (common.Hash{}) {
header, err := b.resolveHeader(ctx)
if err != nil {
return hexutil.Big{}, err
}
h = header.Hash()
}
td, err := b.backend.GetTd(h)
if err != nil {
return hexutil.Big{}, err
}
return hexutil.Big(*td), nil
}
// BlockNumberArgs encapsulates arguments to accessors that specify a block number.
type BlockNumberArgs struct {
// TODO: Ideally we could use input unions to allow the query to specify the
// block parameter by hash, block number, or tag but input unions aren't part of the
// standard GraphQL schema SDL yet, see: https://github.com/graphql/graphql-spec/issues/488
Block *hexutil.Uint64
}
// NumberOr returns the provided block number argument, or the "current" block number or hash if none
// was provided.
func (a BlockNumberArgs) NumberOr(current rpc.BlockNumberOrHash) rpc.BlockNumberOrHash {
if a.Block != nil {
blockNr := rpc.BlockNumber(*a.Block)
return rpc.BlockNumberOrHashWithNumber(blockNr)
}
return current
}
// NumberOrLatest returns the provided block number argument, or the "latest" block number if none
// was provided.
func (a BlockNumberArgs) NumberOrLatest() rpc.BlockNumberOrHash {
return a.NumberOr(rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber))
}
func (b *Block) Miner(ctx context.Context, args BlockNumberArgs) (*Account, error) {
header, err := b.resolveHeader(ctx)
if err != nil {
return nil, err
}
return &Account{
backend: b.backend,
address: header.Coinbase,
blockNrOrHash: args.NumberOrLatest(),
}, nil
}
func (b *Block) TransactionCount(ctx context.Context) (*int32, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
count := int32(len(block.Transactions()))
return &count, err
}
func (b *Block) Transactions(ctx context.Context) (*[]*Transaction, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
ret := make([]*Transaction, 0, len(block.Transactions()))
for i, tx := range block.Transactions() {
ret = append(ret, &Transaction{
backend: b.backend,
hash: tx.Hash(),
tx: tx,
block: b,
index: uint64(i),
})
}
return &ret, nil
}
func (b *Block) TransactionAt(ctx context.Context, args struct{ Index int32 }) (*Transaction, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
txs := block.Transactions()
if args.Index < 0 || int(args.Index) >= len(txs) {
return nil, nil
}
tx := txs[args.Index]
return &Transaction{
backend: b.backend,
hash: tx.Hash(),
tx: tx,
block: b,
index: uint64(args.Index),
}, nil
}
func (b *Block) OmmerAt(ctx context.Context, args struct{ Index int32 }) (*Block, error) {
block, err := b.resolve(ctx)
if err != nil || block == nil {
return nil, err
}
uncles := block.Uncles()
if args.Index < 0 || int(args.Index) >= len(uncles) {
return nil, nil
}
uncle := uncles[args.Index]
blockNumberOrHash := rpc.BlockNumberOrHashWithHash(uncle.Hash(), false)
return &Block{
backend: b.backend,
numberOrHash: &blockNumberOrHash,
header: uncle,
}, nil
}
// BlockFilterCriteria encapsulates criteria passed to a `logs` accessor inside
// a block.
type BlockFilterCriteria struct {
Addresses *[]common.Address // restricts matches to events created by specific contracts
// The Topic list restricts matches to particular event topics. Each event has a list
// of topics. Topics matches a prefix of that list. An empty element slice matches any
// topic. Non-empty elements represent an alternative that matches any of the
// contained topics.
//
// Examples:
// {} or nil matches any topic list
// {{A}} matches topic A in first position
// {{}, {B}} matches any topic in first position, B in second position
// {{A}, {B}} matches topic A in first position, B in second position
// {{A, B}}, {C, D}} matches topic (A OR B) in first position, (C OR D) in second position
Topics *[][]common.Hash
}
// runFilter accepts a filter and executes it, returning all its results as
// `Log` objects.
func runFilter(ctx context.Context, be *eth.Backend, filter *filters.Filter) ([]*Log, error) {
logs, err := filter.Logs(ctx)
if err != nil || logs == nil {
return nil, err
}
ret := make([]*Log, 0, len(logs))
for _, log := range logs {
ret = append(ret, &Log{
backend: be,
transaction: &Transaction{backend: be, hash: log.TxHash},
log: log,
})
}
return ret, nil
}
func (b *Block) Logs(ctx context.Context, args struct{ Filter BlockFilterCriteria }) ([]*Log, error) {
var addresses []common.Address
if args.Filter.Addresses != nil {
addresses = *args.Filter.Addresses
}
var topics [][]common.Hash
if args.Filter.Topics != nil {
topics = *args.Filter.Topics
}
hash := b.hash
if hash == (common.Hash{}) {
header, err := b.resolveHeader(ctx)
if err != nil {
return nil, err
}
hash = header.Hash()
}
// Construct the range filter
filter := filters.NewBlockFilter(b.backend, hash, addresses, topics)
// Run the filter and return all the logs
return runFilter(ctx, b.backend, filter)
}
func (b *Block) Account(ctx context.Context, args struct {
Address common.Address
}) (*Account, error) {
if b.numberOrHash == nil {
_, err := b.resolveHeader(ctx)
if err != nil {
return nil, err
}
}
return &Account{
backend: b.backend,
address: args.Address,
blockNrOrHash: *b.numberOrHash,
}, nil
}
// CallData encapsulates arguments to `call` or `estimateGas`.
// All arguments are optional.
type CallData struct {
From *common.Address // The Ethereum address the call is from.
To *common.Address // The Ethereum address the call is to.
Gas *hexutil.Uint64 // The amount of gas provided for the call.
GasPrice *hexutil.Big // The price of each unit of gas, in wei.
Value *hexutil.Big // The value sent along with the call.
Data *hexutil.Bytes // Any data sent with the call.
}
// CallResult encapsulates the result of an invocation of the `call` accessor.
type CallResult struct {
data hexutil.Bytes // The return data from the call
gasUsed hexutil.Uint64 // The amount of gas used
status hexutil.Uint64 // The return status of the call - 0 for failure or 1 for success.
}
func (c *CallResult) Data() hexutil.Bytes {
return c.data
}
func (c *CallResult) GasUsed() hexutil.Uint64 {
return c.gasUsed
}
func (c *CallResult) Status() hexutil.Uint64 {
return c.status
}
func (b *Block) Call(ctx context.Context, args struct {
Data eth.CallArgs
}) (*CallResult, error) {
if b.numberOrHash == nil {
_, err := b.resolve(ctx)
if err != nil {
return nil, err
}
}
result, gas, failed, err := eth.DoCall(ctx, b.backend, args.Data, *b.numberOrHash, nil, 5*time.Second, b.backend.RPCGasCap())
status := hexutil.Uint64(1)
if failed {
status = 0
}
return &CallResult{
data: hexutil.Bytes(result),
gasUsed: hexutil.Uint64(gas),
status: status,
}, err
}
// Resolver is the top-level object in the GraphQL hierarchy.
type Resolver struct {
backend *eth.Backend
}
func (r *Resolver) Block(ctx context.Context, args struct {
Number *hexutil.Uint64
Hash *common.Hash
}) (*Block, error) {
var block *Block
if args.Number != nil {
number := rpc.BlockNumber(uint64(*args.Number))
numberOrHash := rpc.BlockNumberOrHashWithNumber(number)
block = &Block{
backend: r.backend,
numberOrHash: &numberOrHash,
}
} else if args.Hash != nil {
numberOrHash := rpc.BlockNumberOrHashWithHash(*args.Hash, false)
block = &Block{
backend: r.backend,
numberOrHash: &numberOrHash,
}
} else {
numberOrHash := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
block = &Block{
backend: r.backend,
numberOrHash: &numberOrHash,
}
}
// Resolve the header, return nil if it doesn't exist.
// Note we don't resolve block directly here since it will require an
// additional network request for light client.
h, err := block.resolveHeader(ctx)
if err != nil {
return nil, err
} else if h == nil {
return nil, nil
}
return block, nil
}
func (r *Resolver) Blocks(ctx context.Context, args struct {
From hexutil.Uint64
To *hexutil.Uint64
}) ([]*Block, error) {
from := rpc.BlockNumber(args.From)
var to rpc.BlockNumber
if args.To != nil {
to = rpc.BlockNumber(*args.To)
} else {
to = rpc.BlockNumber(r.backend.CurrentBlock().Number().Int64())
}
if to < from {
return []*Block{}, nil
}
ret := make([]*Block, 0, to-from+1)
for i := from; i <= to; i++ {
numberOrHash := rpc.BlockNumberOrHashWithNumber(i)
ret = append(ret, &Block{
backend: r.backend,
numberOrHash: &numberOrHash,
})
}
return ret, nil
}
func (r *Resolver) Transaction(ctx context.Context, args struct{ Hash common.Hash }) (*Transaction, error) {
tx := &Transaction{
backend: r.backend,
hash: args.Hash,
}
// Resolve the transaction; if it doesn't exist, return nil.
t, err := tx.resolve(ctx)
if err != nil {
return nil, err
} else if t == nil {
return nil, nil
}
return tx, nil
}
// FilterCriteria encapsulates the arguments to `logs` on the root resolver object.
type FilterCriteria struct {
FromBlock *hexutil.Uint64 // beginning of the queried range, nil means genesis block
ToBlock *hexutil.Uint64 // end of the range, nil means latest block
Addresses *[]common.Address // restricts matches to events created by specific contracts
// The Topic list restricts matches to particular event topics. Each event has a list
// of topics. Topics matches a prefix of that list. An empty element slice matches any
// topic. Non-empty elements represent an alternative that matches any of the
// contained topics.
//
// Examples:
// {} or nil matches any topic list
// {{A}} matches topic A in first position
// {{}, {B}} matches any topic in first position, B in second position
// {{A}, {B}} matches topic A in first position, B in second position
// {{A, B}}, {C, D}} matches topic (A OR B) in first position, (C OR D) in second position
Topics *[][]common.Hash
}
func (r *Resolver) Logs(ctx context.Context, args struct{ Filter FilterCriteria }) ([]*Log, error) {
// Convert the RPC block numbers into internal representations
begin := rpc.LatestBlockNumber.Int64()
if args.Filter.FromBlock != nil {
begin = int64(*args.Filter.FromBlock)
}
end := rpc.LatestBlockNumber.Int64()
if args.Filter.ToBlock != nil {
end = int64(*args.Filter.ToBlock)
}
var addresses []common.Address
if args.Filter.Addresses != nil {
addresses = *args.Filter.Addresses
}
var topics [][]common.Hash
if args.Filter.Topics != nil {
topics = *args.Filter.Topics
}
// Construct the range filter
filter := filters.NewRangeFilter(filters.Backend(r.backend), begin, end, addresses, topics)
return runFilter(ctx, r.backend, filter)
}

28
pkg/graphql/graphql_test.go Normal file
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// Copyright 2019 The go-ethereum Authors
// 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 (
"testing"
)
func TestBuildSchema(t *testing.T) {
// Make sure the schema can be parsed and matched up to the object model.
if _, err := newHandler(nil); err != nil {
t.Errorf("Could not construct GraphQL handler: %v", err)
}
}

292
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// Copyright 2019 The go-ethereum Authors
// 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
const schema string = `
# Bytes32 is a 32 byte binary string, represented as 0x-prefixed hexadecimal.
scalar Bytes32
# Address is a 20 byte Ethereum address, represented as 0x-prefixed hexadecimal.
scalar Address
# Bytes is an arbitrary length binary string, represented as 0x-prefixed hexadecimal.
# An empty byte string is represented as '0x'. Byte strings must have an even number of hexadecimal nybbles.
scalar Bytes
# BigInt is a large integer. Input is accepted as either a JSON number or as a string.
# Strings may be either decimal or 0x-prefixed hexadecimal. Output values are all
# 0x-prefixed hexadecimal.
scalar BigInt
# Long is a 64 bit unsigned integer.
scalar Long
schema {
query: Query
mutation: Mutation
}
# Account is an Ethereum account at a particular block.
type Account {
# Address is the address owning the account.
address: Address!
# Balance is the balance of the account, in wei.
balance: BigInt!
# TransactionCount is the number of transactions sent from this account,
# or in the case of a contract, the number of contracts created. Otherwise
# known as the nonce.
transactionCount: Long!
# Code contains the smart contract code for this account, if the account
# is a (non-self-destructed) contract.
code: Bytes!
# Storage provides access to the storage of a contract account, indexed
# by its 32 byte slot identifier.
storage(slot: Bytes32!): Bytes32!
}
# Log is an Ethereum event log.
type Log {
# Index is the index of this log in the block.
index: Int!
# Account is the account which generated this log - this will always
# be a contract account.
account(block: Long): Account!
# Topics is a list of 0-4 indexed topics for the log.
topics: [Bytes32!]!
# Data is unindexed data for this log.
data: Bytes!
# Transaction is the transaction that generated this log entry.
transaction: Transaction!
}
# Transaction is an Ethereum transaction.
type Transaction {
# Hash is the hash of this transaction.
hash: Bytes32!
# Nonce is the nonce of the account this transaction was generated with.
nonce: Long!
# Index is the index of this transaction in the parent block. This will
# be null if the transaction has not yet been mined.
index: Int
# From is the account that sent this transaction - this will always be
# an externally owned account.
from(block: Long): Account!
# To is the account the transaction was sent to. This is null for
# contract-creating transactions.
to(block: Long): Account
# Value is the value, in wei, sent along with this transaction.
value: BigInt!
# GasPrice is the price offered to miners for gas, in wei per unit.
gasPrice: BigInt!
# Gas is the maximum amount of gas this transaction can consume.
gas: Long!
# InputData is the data supplied to the target of the transaction.
inputData: Bytes!
# Block is the block this transaction was mined in. This will be null if
# the transaction has not yet been mined.
block: Block
# Status is the return status of the transaction. This will be 1 if the
# transaction succeeded, or 0 if it failed (due to a revert, or due to
# running out of gas). If the transaction has not yet been mined, this
# field will be null.
status: Long
# GasUsed is the amount of gas that was used processing this transaction.
# If the transaction has not yet been mined, this field will be null.
gasUsed: Long
# CumulativeGasUsed is the total gas used in the block up to and including
# this transaction. If the transaction has not yet been mined, this field
# will be null.
cumulativeGasUsed: Long
# CreatedContract is the account that was created by a contract creation
# transaction. If the transaction was not a contract creation transaction,
# or it has not yet been mined, this field will be null.
createdContract(block: Long): Account
# Logs is a list of log entries emitted by this transaction. If the
# transaction has not yet been mined, this field will be null.
logs: [Log!]
r: BigInt!
s: BigInt!
v: BigInt!
}
# BlockFilterCriteria encapsulates log filter criteria for a filter applied
# to a single block.
input BlockFilterCriteria {
# Addresses is list of addresses that are of interest. If this list is
# empty, results will not be filtered by address.
addresses: [Address!]
# Topics list restricts matches to particular event topics. Each event has a list
# of topics. Topics matches a prefix of that list. An empty element array matches any
# topic. Non-empty elements represent an alternative that matches any of the
# contained topics.
#
# Examples:
# - [] or nil matches any topic list
# - [[A]] matches topic A in first position
# - [[], [B]] matches any topic in first position, B in second position
# - [[A], [B]] matches topic A in first position, B in second position
# - [[A, B]], [C, D]] matches topic (A OR B) in first position, (C OR D) in second position
topics: [[Bytes32!]!]
}
# Block is an Ethereum block.
type Block {
# Number is the number of this block, starting at 0 for the genesis block.
number: Long!
# Hash is the block hash of this block.
hash: Bytes32!
# Parent is the parent block of this block.
parent: Block
# Nonce is the block nonce, an 8 byte sequence determined by the miner.
nonce: Bytes!
# TransactionsRoot is the keccak256 hash of the root of the trie of transactions in this block.
transactionsRoot: Bytes32!
# TransactionCount is the number of transactions in this block. if
# transactions are not available for this block, this field will be null.
transactionCount: Int
# StateRoot is the keccak256 hash of the state trie after this block was processed.
stateRoot: Bytes32!
# ReceiptsRoot is the keccak256 hash of the trie of transaction receipts in this block.
receiptsRoot: Bytes32!
# Miner is the account that mined this block.
miner(block: Long): Account!
# ExtraData is an arbitrary data field supplied by the miner.
extraData: Bytes!
# GasLimit is the maximum amount of gas that was available to transactions in this block.
gasLimit: Long!
# GasUsed is the amount of gas that was used executing transactions in this block.
gasUsed: Long!
# Timestamp is the unix timestamp at which this block was mined.
timestamp: Long!
# LogsBloom is a bloom filter that can be used to check if a block may
# contain log entries matching a filter.
logsBloom: Bytes!
# MixHash is the hash that was used as an input to the PoW process.
mixHash: Bytes32!
# Difficulty is a measure of the difficulty of mining this block.
difficulty: BigInt!
# TotalDifficulty is the sum of all difficulty values up to and including
# this block.
totalDifficulty: BigInt!
# OmmerCount is the number of ommers (AKA uncles) associated with this
# block. If ommers are unavailable, this field will be null.
ommerCount: Int
# Ommers is a list of ommer (AKA uncle) blocks associated with this block.
# If ommers are unavailable, this field will be null. Depending on your
# node, the transactions, transactionAt, transactionCount, ommers,
# ommerCount and ommerAt fields may not be available on any ommer blocks.
ommers: [Block]
# OmmerAt returns the ommer (AKA uncle) at the specified index. If ommers
# are unavailable, or the index is out of bounds, this field will be null.
ommerAt(index: Int!): Block
# OmmerHash is the keccak256 hash of all the ommers (AKA uncles)
# associated with this block.
ommerHash: Bytes32!
# Transactions is a list of transactions associated with this block. If
# transactions are unavailable for this block, this field will be null.
transactions: [Transaction!]
# TransactionAt returns the transaction at the specified index. If
# transactions are unavailable for this block, or if the index is out of
# bounds, this field will be null.
transactionAt(index: Int!): Transaction
# Logs returns a filtered set of logs from this block.
logs(filter: BlockFilterCriteria!): [Log!]!
# Account fetches an Ethereum account at the current block's state.
account(address: Address!): Account!
# Call executes a local call operation at the current block's state.
call(data: CallData!): CallResult
# EstimateGas estimates the amount of gas that will be required for
# successful execution of a transaction at the current block's state.
estimateGas(data: CallData!): Long!
}
# CallData represents the data associated with a local contract call.
# All fields are optional.
input CallData {
# From is the address making the call.
from: Address
# To is the address the call is sent to.
to: Address
# Gas is the amount of gas sent with the call.
gas: Long
# GasPrice is the price, in wei, offered for each unit of gas.
gasPrice: BigInt
# Value is the value, in wei, sent along with the call.
value: BigInt
# Data is the data sent to the callee.
data: Bytes
}
# CallResult is the result of a local call operation.
type CallResult {
# Data is the return data of the called contract.
data: Bytes!
# GasUsed is the amount of gas used by the call, after any refunds.
gasUsed: Long!
# Status is the result of the call - 1 for success or 0 for failure.
status: Long!
}
# FilterCriteria encapsulates log filter criteria for searching log entries.
input FilterCriteria {
# FromBlock is the block at which to start searching, inclusive. Defaults
# to the latest block if not supplied.
fromBlock: Long
# ToBlock is the block at which to stop searching, inclusive. Defaults
# to the latest block if not supplied.
toBlock: Long
# Addresses is a list of addresses that are of interest. If this list is
# empty, results will not be filtered by address.
addresses: [Address!]
# Topics list restricts matches to particular event topics. Each event has a list
# of topics. Topics matches a prefix of that list. An empty element array matches any
# topic. Non-empty elements represent an alternative that matches any of the
# contained topics.
#
# Examples:
# - [] or nil matches any topic list
# - [[A]] matches topic A in first position
# - [[], [B]] matches any topic in first position, B in second position
# - [[A], [B]] matches topic A in first position, B in second position
# - [[A, B]], [C, D]] matches topic (A OR B) in first position, (C OR D) in second position
topics: [[Bytes32!]!]
}
type Query {
# Block fetches an Ethereum block by number or by hash. If neither is
# supplied, the most recent known block is returned.
block(number: Long, hash: Bytes32): Block
# Blocks returns all the blocks between two numbers, inclusive. If
# to is not supplied, it defaults to the most recent known block.
blocks(from: Long!, to: Long): [Block!]!
# Pending returns the current pending state.
pending: Pending!
# Transaction returns a transaction specified by its hash.
transaction(hash: Bytes32!): Transaction
# Logs returns log entries matching the provided filter.
logs(filter: FilterCriteria!): [Log!]!
# GasPrice returns the node's estimate of a gas price sufficient to
# ensure a transaction is mined in a timely fashion.
gasPrice: BigInt!
# ProtocolVersion returns the current wire protocol version number.
protocolVersion: Int!
# Syncing returns information on the current synchronisation state.
syncing: SyncState
}
type Mutation {
# SendRawTransaction sends an RLP-encoded transaction to the network.
sendRawTransaction(data: Bytes!): Bytes32!
}
`

104
pkg/graphql/service.go Normal file
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@ -0,0 +1,104 @@
// Copyright 2019 The go-ethereum Authors
// 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 (
"fmt"
"net"
"net/http"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rpc"
"github.com/graph-gophers/graphql-go"
"github.com/graph-gophers/graphql-go/relay"
"github.com/vulcanize/ipld-eth-server/pkg/eth"
)
// Service encapsulates a GraphQL service.
type Service struct {
endpoint string // The host:port endpoint for this service.
cors []string // Allowed CORS domains
vhosts []string // Recognised vhosts
timeouts rpc.HTTPTimeouts // Timeout settings for HTTP requests.
backend *eth.Backend // The backend that queries will operate onn.
handler http.Handler // The `http.Handler` used to answer queries.
listener net.Listener // The listening socket.
}
// New constructs a new GraphQL service instance.
func New(backend *eth.Backend, endpoint string, cors, vhosts []string, timeouts rpc.HTTPTimeouts) (*Service, error) {
return &Service{
endpoint: endpoint,
cors: cors,
vhosts: vhosts,
timeouts: timeouts,
backend: backend,
}, nil
}
// Protocols returns the list of protocols exported by this service.
func (s *Service) Protocols() []p2p.Protocol { return nil }
// APIs returns the list of APIs exported by this service.
func (s *Service) APIs() []rpc.API { return nil }
// Start is called after all services have been constructed and the networking
// layer was also initialized to spawn any goroutines required by the service.
func (s *Service) Start(server *p2p.Server) error {
var err error
s.handler, err = newHandler(s.backend)
if err != nil {
return err
}
if s.listener, err = net.Listen("tcp", s.endpoint); err != nil {
return err
}
go rpc.NewHTTPServer(s.cors, s.vhosts, s.timeouts, s.handler).Serve(s.listener)
log.Info("GraphQL endpoint opened", "url", fmt.Sprintf("http://%s", s.endpoint))
return nil
}
// newHandler returns a new `http.Handler` that will answer GraphQL queries.
// It additionally exports an interactive query browser on the / endpoint.
func newHandler(backend *eth.Backend) (http.Handler, error) {
q := Resolver{backend}
s, err := graphql.ParseSchema(schema, &q)
if err != nil {
return nil, err
}
h := &relay.Handler{Schema: s}
mux := http.NewServeMux()
mux.Handle("/", GraphiQL{})
mux.Handle("/graphql", h)
mux.Handle("/graphql/", h)
return mux, nil
}
// Stop terminates all goroutines belonging to the service, blocking until they
// are all terminated.
func (s *Service) Stop() error {
if s.listener != nil {
s.listener.Close()
s.listener = nil
log.Info("GraphQL endpoint closed", "url", fmt.Sprintf("http://%s", s.endpoint))
}
return nil
}

1
pkg/serve/config.go
View File

@ -68,7 +68,6 @@ type Config struct {
func NewConfig() (*Config, error) {
c := new(Config)
viper.BindEnv("ethereum.httpPath", shared.ETH_HTTP_PATH)
viper.BindEnv("server.wsPath", SERVER_WS_PATH)
viper.BindEnv("server.ipcPath", SERVER_IPC_PATH)
viper.BindEnv("server.httpPath", SERVER_HTTP_PATH)