1045 lines
28 KiB
Go
1045 lines
28 KiB
Go
// VulcanizeDB
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// Copyright © 2020 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// Package graphql provides a GraphQL interface to Ethereum node data.
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package graphql
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import (
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"context"
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"database/sql"
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"errors"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth/filters"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/vulcanize/ipld-eth-server/pkg/eth"
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)
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var (
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errBlockInvariant = errors.New("block objects must be instantiated with at least one of num or hash")
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)
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// Account represents an Ethereum account at a particular block.
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type Account struct {
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backend *eth.Backend
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address common.Address
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blockNrOrHash rpc.BlockNumberOrHash
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}
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// getState fetches the StateDB object for an account.
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func (a *Account) getState(ctx context.Context) (*state.StateDB, error) {
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state, _, err := a.backend.StateAndHeaderByNumberOrHash(ctx, a.blockNrOrHash)
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return state, err
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}
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func (a *Account) Address(ctx context.Context) (common.Address, error) {
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return a.address, nil
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}
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func (a *Account) Balance(ctx context.Context) (hexutil.Big, error) {
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state, err := a.getState(ctx)
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if err != nil {
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return hexutil.Big{}, err
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}
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return hexutil.Big(*state.GetBalance(a.address)), nil
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}
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func (a *Account) TransactionCount(ctx context.Context) (hexutil.Uint64, error) {
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state, err := a.getState(ctx)
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if err != nil {
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return 0, err
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}
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return hexutil.Uint64(state.GetNonce(a.address)), nil
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}
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func (a *Account) Code(ctx context.Context) (hexutil.Bytes, error) {
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state, err := a.getState(ctx)
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if err != nil {
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return hexutil.Bytes{}, err
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}
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return hexutil.Bytes(state.GetCode(a.address)), nil
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}
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func (a *Account) Storage(ctx context.Context, args struct{ Slot common.Hash }) (common.Hash, error) {
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state, err := a.getState(ctx)
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if err != nil {
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return common.Hash{}, err
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}
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return state.GetState(a.address, args.Slot), nil
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}
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// Log represents an individual log message. All arguments are mandatory.
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type Log struct {
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backend *eth.Backend
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transaction *Transaction
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log *types.Log
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cid string
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ipldBlock []byte
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}
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func (l *Log) Transaction(ctx context.Context) *Transaction {
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return l.transaction
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}
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func (l *Log) Account(ctx context.Context, args BlockNumberArgs) *Account {
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return &Account{
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backend: l.backend,
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address: l.log.Address,
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blockNrOrHash: args.NumberOrLatest(),
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}
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}
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func (l *Log) Index(ctx context.Context) int32 {
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return int32(l.log.Index)
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}
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func (l *Log) Topics(ctx context.Context) []common.Hash {
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return l.log.Topics
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}
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func (l *Log) Data(ctx context.Context) hexutil.Bytes {
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return hexutil.Bytes(l.log.Data)
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}
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func (l *Log) Cid(ctx context.Context) string {
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return l.cid
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}
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func (l *Log) IpldBlock(ctx context.Context) hexutil.Bytes {
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return hexutil.Bytes(l.ipldBlock)
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}
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// Transaction represents an Ethereum transaction.
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// backend and hash are mandatory; all others will be fetched when required.
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type Transaction struct {
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backend *eth.Backend
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hash common.Hash
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tx *types.Transaction
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block *Block
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index uint64
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}
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// resolve returns the internal transaction object, fetching it if needed.
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func (t *Transaction) resolve(ctx context.Context) (*types.Transaction, error) {
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if t.tx == nil {
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tx, blockHash, _, index := rawdb.ReadTransaction(t.backend.ChainDb(), t.hash)
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if tx != nil {
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t.tx = tx
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blockNrOrHash := rpc.BlockNumberOrHashWithHash(blockHash, false)
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t.block = &Block{
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backend: t.backend,
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numberOrHash: &blockNrOrHash,
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}
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t.index = index
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}
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}
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return t.tx, nil
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}
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func (t *Transaction) Hash(ctx context.Context) common.Hash {
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return t.hash
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}
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func (t *Transaction) InputData(ctx context.Context) (hexutil.Bytes, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Bytes{}, err
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}
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return hexutil.Bytes(tx.Data()), nil
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}
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func (t *Transaction) Gas(ctx context.Context) (hexutil.Uint64, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return 0, err
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}
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return hexutil.Uint64(tx.Gas()), nil
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}
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func (t *Transaction) GasPrice(ctx context.Context) (hexutil.Big, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Big{}, err
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}
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return hexutil.Big(*tx.GasPrice()), nil
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}
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func (t *Transaction) Value(ctx context.Context) (hexutil.Big, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Big{}, err
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}
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return hexutil.Big(*tx.Value()), nil
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}
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func (t *Transaction) Nonce(ctx context.Context) (hexutil.Uint64, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return 0, err
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}
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return hexutil.Uint64(tx.Nonce()), nil
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}
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func (t *Transaction) To(ctx context.Context, args BlockNumberArgs) (*Account, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return nil, err
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}
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to := tx.To()
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if to == nil {
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return nil, nil
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}
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return &Account{
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backend: t.backend,
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address: *to,
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blockNrOrHash: args.NumberOrLatest(),
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}, nil
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}
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func (t *Transaction) From(ctx context.Context, args BlockNumberArgs) (*Account, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return nil, err
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}
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var signer types.Signer = types.HomesteadSigner{}
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if tx.Protected() {
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signer = types.NewEIP155Signer(tx.ChainId())
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}
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from, _ := types.Sender(signer, tx)
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return &Account{
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backend: t.backend,
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address: from,
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blockNrOrHash: args.NumberOrLatest(),
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}, nil
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}
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func (t *Transaction) Block(ctx context.Context) (*Block, error) {
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if _, err := t.resolve(ctx); err != nil {
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return nil, err
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}
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return t.block, nil
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}
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func (t *Transaction) Index(ctx context.Context) (*int32, error) {
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if _, err := t.resolve(ctx); err != nil {
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return nil, err
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}
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if t.block == nil {
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return nil, nil
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}
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index := int32(t.index)
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return &index, nil
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}
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// getReceipt returns the receipt associated with this transaction, if any.
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func (t *Transaction) getReceipt(ctx context.Context) (*types.Receipt, error) {
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if _, err := t.resolve(ctx); err != nil {
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return nil, err
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}
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if t.block == nil {
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return nil, nil
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}
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receipts, err := t.block.resolveReceipts(ctx)
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if err != nil {
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return nil, err
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}
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return receipts[t.index], nil
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}
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func (t *Transaction) Status(ctx context.Context) (*hexutil.Uint64, error) {
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receipt, err := t.getReceipt(ctx)
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if err != nil || receipt == nil {
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return nil, err
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}
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ret := hexutil.Uint64(receipt.Status)
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return &ret, nil
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}
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func (t *Transaction) GasUsed(ctx context.Context) (*hexutil.Uint64, error) {
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receipt, err := t.getReceipt(ctx)
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if err != nil || receipt == nil {
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return nil, err
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}
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ret := hexutil.Uint64(receipt.GasUsed)
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return &ret, nil
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}
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func (t *Transaction) CumulativeGasUsed(ctx context.Context) (*hexutil.Uint64, error) {
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receipt, err := t.getReceipt(ctx)
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if err != nil || receipt == nil {
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return nil, err
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}
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ret := hexutil.Uint64(receipt.CumulativeGasUsed)
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return &ret, nil
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}
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func (t *Transaction) CreatedContract(ctx context.Context, args BlockNumberArgs) (*Account, error) {
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receipt, err := t.getReceipt(ctx)
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if err != nil || receipt == nil || receipt.ContractAddress == (common.Address{}) {
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return nil, err
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}
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return &Account{
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backend: t.backend,
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address: receipt.ContractAddress,
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blockNrOrHash: args.NumberOrLatest(),
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}, nil
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}
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func (t *Transaction) Logs(ctx context.Context) (*[]*Log, error) {
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receipt, err := t.getReceipt(ctx)
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if err != nil || receipt == nil {
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return nil, err
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}
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ret := make([]*Log, 0, len(receipt.Logs))
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for _, log := range receipt.Logs {
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ret = append(ret, &Log{
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backend: t.backend,
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transaction: t,
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log: log,
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})
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}
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return &ret, nil
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}
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func (t *Transaction) R(ctx context.Context) (hexutil.Big, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Big{}, err
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}
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_, r, _ := tx.RawSignatureValues()
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return hexutil.Big(*r), nil
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}
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func (t *Transaction) S(ctx context.Context) (hexutil.Big, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Big{}, err
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}
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_, _, s := tx.RawSignatureValues()
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return hexutil.Big(*s), nil
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}
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func (t *Transaction) V(ctx context.Context) (hexutil.Big, error) {
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tx, err := t.resolve(ctx)
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if err != nil || tx == nil {
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return hexutil.Big{}, err
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}
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v, _, _ := tx.RawSignatureValues()
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return hexutil.Big(*v), nil
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}
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type BlockType int
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// Block represents an Ethereum block.
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// backend, and numberOrHash are mandatory. All other fields are lazily fetched
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// when required.
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type Block struct {
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backend *eth.Backend
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numberOrHash *rpc.BlockNumberOrHash
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hash common.Hash
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header *types.Header
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block *types.Block
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receipts []*types.Receipt
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}
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// resolve returns the internal Block object representing this block, fetching
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// it if necessary.
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func (b *Block) resolve(ctx context.Context) (*types.Block, error) {
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if b.block != nil {
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return b.block, nil
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}
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if b.numberOrHash == nil {
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latest := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
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b.numberOrHash = &latest
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}
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var err error
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b.block, err = b.backend.BlockByNumberOrHash(ctx, *b.numberOrHash)
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if b.block != nil && b.header == nil {
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b.header = b.block.Header()
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if hash, ok := b.numberOrHash.Hash(); ok {
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b.hash = hash
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}
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}
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return b.block, err
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}
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// resolveHeader returns the internal Header object for this block, fetching it
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// if necessary. Call this function instead of `resolve` unless you need the
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// additional data (transactions and uncles).
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func (b *Block) resolveHeader(ctx context.Context) (*types.Header, error) {
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if b.numberOrHash == nil && b.hash == (common.Hash{}) {
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return nil, errBlockInvariant
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}
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var err error
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if b.header == nil {
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if b.hash != (common.Hash{}) {
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b.header, err = b.backend.HeaderByHash(ctx, b.hash)
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} else {
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b.header, err = b.backend.HeaderByNumberOrHash(ctx, *b.numberOrHash)
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}
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}
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return b.header, err
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}
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// resolveReceipts returns the list of receipts for this block, fetching them
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// if necessary.
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func (b *Block) resolveReceipts(ctx context.Context) ([]*types.Receipt, error) {
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if b.receipts == nil {
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hash := b.hash
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if hash == (common.Hash{}) {
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return nil, err
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}
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hash = header.Hash()
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}
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receipts, err := b.backend.GetReceipts(ctx, hash)
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if err != nil {
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return nil, err
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}
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b.receipts = []*types.Receipt(receipts)
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}
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return b.receipts, nil
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}
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func (b *Block) Number(ctx context.Context) (hexutil.Uint64, error) {
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return 0, err
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}
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return hexutil.Uint64(header.Number.Uint64()), nil
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}
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func (b *Block) Hash(ctx context.Context) (common.Hash, error) {
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if b.hash == (common.Hash{}) {
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return common.Hash{}, err
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}
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b.hash = header.Hash()
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}
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return b.hash, nil
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}
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func (b *Block) GasLimit(ctx context.Context) (hexutil.Uint64, error) {
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return 0, err
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}
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return hexutil.Uint64(header.GasLimit), nil
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}
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func (b *Block) GasUsed(ctx context.Context) (hexutil.Uint64, error) {
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return 0, err
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}
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return hexutil.Uint64(header.GasUsed), nil
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}
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func (b *Block) Parent(ctx context.Context) (*Block, error) {
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// If the block header hasn't been fetched, and we'll need it, fetch it.
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if b.numberOrHash == nil && b.header == nil {
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if _, err := b.resolveHeader(ctx); err != nil {
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return nil, err
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}
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}
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if b.header != nil && b.header.Number.Uint64() > 0 {
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num := rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(b.header.Number.Uint64() - 1))
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return &Block{
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backend: b.backend,
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numberOrHash: &num,
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hash: b.header.ParentHash,
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}, nil
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}
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return nil, nil
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}
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func (b *Block) Difficulty(ctx context.Context) (hexutil.Big, error) {
|
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return hexutil.Big{}, err
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}
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return hexutil.Big(*header.Difficulty), nil
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}
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func (b *Block) Timestamp(ctx context.Context) (hexutil.Uint64, error) {
|
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return 0, err
|
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}
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return hexutil.Uint64(header.Time), nil
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}
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func (b *Block) Nonce(ctx context.Context) (hexutil.Bytes, error) {
|
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return hexutil.Bytes{}, err
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}
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return hexutil.Bytes(header.Nonce[:]), nil
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}
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func (b *Block) MixHash(ctx context.Context) (common.Hash, error) {
|
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return common.Hash{}, err
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}
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return header.MixDigest, nil
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}
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|
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func (b *Block) TransactionsRoot(ctx context.Context) (common.Hash, error) {
|
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header, err := b.resolveHeader(ctx)
|
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if err != nil {
|
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return common.Hash{}, err
|
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}
|
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return header.TxHash, nil
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}
|
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|
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func (b *Block) StateRoot(ctx context.Context) (common.Hash, error) {
|
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header, err := b.resolveHeader(ctx)
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if err != nil {
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return common.Hash{}, err
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}
|
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return header.Root, nil
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}
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|
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func (b *Block) ReceiptsRoot(ctx context.Context) (common.Hash, error) {
|
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header, err := b.resolveHeader(ctx)
|
|
if err != nil {
|
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return common.Hash{}, err
|
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}
|
|
return header.ReceiptHash, nil
|
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}
|
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|
|
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 {
|
|
block, err := r.backend.CurrentBlock()
|
|
if err != nil {
|
|
return []*Block{}, nil
|
|
}
|
|
to = rpc.BlockNumber(block.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)
|
|
}
|
|
|
|
// StorageResult represents a storage slot value. All arguments are mandatory.
|
|
type StorageResult struct {
|
|
value []byte
|
|
cid string
|
|
ipldBlock []byte
|
|
}
|
|
|
|
func (s *StorageResult) Value(ctx context.Context) common.Hash {
|
|
return common.BytesToHash(s.value)
|
|
}
|
|
|
|
func (s *StorageResult) Cid(ctx context.Context) string {
|
|
return s.cid
|
|
}
|
|
|
|
func (s *StorageResult) IpldBlock(ctx context.Context) hexutil.Bytes {
|
|
return hexutil.Bytes(s.ipldBlock)
|
|
}
|
|
|
|
func (r *Resolver) GetStorageAt(ctx context.Context, args struct {
|
|
BlockHash common.Hash
|
|
Contract common.Address
|
|
Slot common.Hash
|
|
}) (*StorageResult, error) {
|
|
cid, ipldBlock, rlpValue, err := r.backend.IPLDRetriever.RetrieveStorageAtByAddressAndStorageSlotAndBlockHash(args.Contract, args.Slot, args.BlockHash)
|
|
|
|
if err != nil {
|
|
if err == sql.ErrNoRows {
|
|
ret := StorageResult{value: ([]byte{}), cid: "", ipldBlock: ([]byte{})}
|
|
|
|
return &ret, nil
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
var value interface{}
|
|
err = rlp.DecodeBytes(rlpValue, &value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ret := StorageResult{value: value.([]byte), cid: cid, ipldBlock: ipldBlock}
|
|
|
|
return &ret, nil
|
|
}
|
|
|
|
func (r *Resolver) GetLogs(ctx context.Context, args struct {
|
|
BlockHash common.Hash
|
|
Contract common.Address
|
|
}) (*[]*Log, error) {
|
|
ret := make([]*Log, 0, 10)
|
|
|
|
receiptCIDs, receiptsBytes, err := r.backend.IPLDRetriever.RetrieveReceiptsByBlockHash(args.BlockHash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
receipts := make(types.Receipts, len(receiptsBytes))
|
|
for index, receiptBytes := range receiptsBytes {
|
|
receiptCID := receiptCIDs[index]
|
|
receipt := new(types.Receipt)
|
|
if err := rlp.DecodeBytes(receiptBytes, receipt); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
receipts[index] = receipt
|
|
for _, log := range receipt.Logs {
|
|
if log.Address == args.Contract {
|
|
ret = append(ret, &Log{
|
|
backend: r.backend,
|
|
log: log,
|
|
cid: receiptCID,
|
|
ipldBlock: receiptBytes,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
return &ret, nil
|
|
}
|