// Copyright 2015 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 eth
import (
"context"
"errors"
"math/big"
"github.com/ava-labs/coreth/accounts"
"github.com/ava-labs/coreth/consensus"
"github.com/ava-labs/coreth/core"
"github.com/ava-labs/coreth/core/bloombits"
"github.com/ava-labs/coreth/core/rawdb"
"github.com/ava-labs/coreth/core/state"
"github.com/ava-labs/coreth/core/types"
"github.com/ava-labs/coreth/core/vm"
"github.com/ava-labs/coreth/eth/gasprice"
"github.com/ava-labs/coreth/miner"
"github.com/ava-labs/coreth/params"
"github.com/ava-labs/coreth/rpc"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
)
// EthAPIBackend implements ethapi.Backend for full nodes
type EthAPIBackend struct {
extRPCEnabled bool
eth *Ethereum
gpo *gasprice.Oracle
}
// ChainConfig returns the active chain configuration.
func (b *EthAPIBackend) ChainConfig() *params.ChainConfig {
return b.eth.blockchain.Config()
}
func (b *EthAPIBackend) CurrentBlock() *types.Block {
return b.eth.blockchain.CurrentBlock()
}
func (b *EthAPIBackend) AcceptedBlock() *types.Block {
return b.eth.AcceptedBlock()
}
func (b *EthAPIBackend) SetHead(number uint64) {
//b.eth.protocolManager.downloader.Cancel()
b.eth.blockchain.SetHead(number)
}
func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
// Pending block is only known by the miner in
// Ethereum, but Coreth does not have the same notion.
// So we treat requests for the pending block identically
// to the latest accepted block instead
if number == rpc.PendingBlockNumber {
return b.eth.AcceptedBlock().Header(), nil
}
// Otherwise resolve and return the block
if number == rpc.LatestBlockNumber {
return b.eth.blockchain.CurrentBlock().Header(), nil
}
if number == rpc.AcceptedBlockNumber {
return b.eth.AcceptedBlock().Header(), nil
}
return b.eth.blockchain.GetHeaderByNumber(uint64(number)), nil
}
func (b *EthAPIBackend) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.HeaderByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
header := b.eth.blockchain.GetHeaderByHash(hash)
if header == nil {
return nil, errors.New("header for hash not found")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
return nil, errors.New("hash is not currently canonical")
}
return header, nil
}
return nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *EthAPIBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
return b.eth.blockchain.GetHeaderByHash(hash), nil
}
func (b *EthAPIBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
// Pending block is only known by the miner in
// Ethereum, but Coreth does not have the same notion.
// So we treat requests for the pending block identically
// to the latest accepted block instead
if number == rpc.PendingBlockNumber {
return b.eth.AcceptedBlock(), nil
}
// Otherwise resolve and return the block
if number == rpc.LatestBlockNumber {
return b.eth.blockchain.CurrentBlock(), nil
}
if number == rpc.AcceptedBlockNumber {
return b.eth.AcceptedBlock(), nil
}
return b.eth.blockchain.GetBlockByNumber(uint64(number)), nil
}
func (b *EthAPIBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
return b.eth.blockchain.GetBlockByHash(hash), nil
}
func (b *EthAPIBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.BlockByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
header := b.eth.blockchain.GetHeaderByHash(hash)
if header == nil {
return nil, errors.New("header for hash not found")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
return nil, errors.New("hash is not currently canonical")
}
block := b.eth.blockchain.GetBlock(hash, header.Number.Uint64())
if block == nil {
return nil, errors.New("header found, but block body is missing")
}
return block, nil
}
return nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *EthAPIBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
// Note: Ethereum typically first checks if the request is for
// the pending block (by rpc.PendingBlockNumber), but Coreth
// does not have the same notion of the miner having a pending
// block, so this is skipped here
// Request the block by its number and retrieve its state
header, err := b.HeaderByNumber(ctx, number)
if err != nil {
return nil, nil, err
}
if header == nil {
return nil, nil, errors.New("header not found")
}
stateDb, err := b.eth.BlockChain().StateAt(header.Root)
return stateDb, header, err
}
func (b *EthAPIBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.StateAndHeaderByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
header, err := b.HeaderByHash(ctx, hash)
if err != nil {
return nil, nil, err
}
if header == nil {
return nil, nil, errors.New("header for hash not found")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
return nil, nil, errors.New("hash is not currently canonical")
}
stateDb, err := b.eth.BlockChain().StateAt(header.Root)
return stateDb, header, err
}
return nil, nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *EthAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
return b.eth.blockchain.GetReceiptsByHash(hash), nil
}
func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
receipts := b.eth.blockchain.GetReceiptsByHash(hash)
if receipts == nil {
return nil, nil
}
logs := make([][]*types.Log, len(receipts))
for i, receipt := range receipts {
logs[i] = receipt.Logs
}
return logs, nil
}
func (b *EthAPIBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int {
return b.eth.blockchain.GetTdByHash(hash)
}
func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
vmError := func() error { return nil }
context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
return vm.NewEVM(context, state, b.eth.blockchain.Config(), *b.eth.blockchain.GetVMConfig()), vmError, nil
}
func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch)
}
func (b *EthAPIBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription {
return b.eth.miner.SubscribePendingLogs(ch)
}
func (b *EthAPIBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
return b.eth.BlockChain().SubscribeChainEvent(ch)
}
func (b *EthAPIBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
return b.eth.BlockChain().SubscribeChainHeadEvent(ch)
}
func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
return b.eth.BlockChain().SubscribeChainSideEvent(ch)
}
func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
return b.eth.BlockChain().SubscribeLogsEvent(ch)
}
func (b *EthAPIBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
err := b.eth.txPool.AddLocal(signedTx)
select {
case b.eth.txSubmitChan <- struct{}{}:
default:
}
return err
}
func (b *EthAPIBackend) GetPoolTransactions() (types.Transactions, error) {
pending, err := b.eth.txPool.Pending()
if err != nil {
return nil, err
}
var txs types.Transactions
for _, batch := range pending {
txs = append(txs, batch...)
}
return txs, nil
}
func (b *EthAPIBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
return b.eth.txPool.Get(hash)
}
func (b *EthAPIBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
tx, blockHash, blockNumber, index := rawdb.ReadTransaction(b.eth.ChainDb(), txHash)
return tx, blockHash, blockNumber, index, nil
}
func (b *EthAPIBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
return b.eth.txPool.Nonce(addr), nil
}
func (b *EthAPIBackend) Stats() (pending int, queued int) {
return b.eth.txPool.Stats()
}
func (b *EthAPIBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
return b.eth.TxPool().Content()
}
func (b *EthAPIBackend) TxPool() *core.TxPool {
return b.eth.TxPool()
}
func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
return b.eth.TxPool().SubscribeNewTxsEvent(ch)
}
func (b *EthAPIBackend) Downloader() *downloader.Downloader {
return b.eth.Downloader()
}
func (b *EthAPIBackend) ProtocolVersion() int {
return b.eth.EthVersion()
}
func (b *EthAPIBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
return b.gpo.SuggestPrice(ctx)
}
func (b *EthAPIBackend) ChainDb() ethdb.Database {
return b.eth.ChainDb()
}
func (b *EthAPIBackend) EventMux() *event.TypeMux {
return b.eth.EventMux()
}
func (b *EthAPIBackend) AccountManager() *accounts.Manager {
return b.eth.AccountManager()
}
func (b *EthAPIBackend) ExtRPCEnabled() bool {
return b.extRPCEnabled
}
func (b *EthAPIBackend) RPCGasCap() uint64 {
return b.eth.config.RPCGasCap
}
func (b *EthAPIBackend) RPCTxFeeCap() float64 {
return b.eth.config.RPCTxFeeCap
}
func (b *EthAPIBackend) BloomStatus() (uint64, uint64) {
sections, _, _ := b.eth.bloomIndexer.Sections()
return params.BloomBitsBlocks, sections
}
func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
for i := 0; i < bloomFilterThreads; i++ {
go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
}
}
func (b *EthAPIBackend) Engine() consensus.Engine {
return b.eth.engine
}
func (b *EthAPIBackend) CurrentHeader() *types.Header {
return b.eth.blockchain.CurrentHeader()
}
func (b *EthAPIBackend) Miner() *miner.Miner {
return b.eth.Miner()
}
func (b *EthAPIBackend) StartMining(threads int) error {
return b.eth.StartMining(threads)
}