mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
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b4a2681120
This PR reimplements the light client server pool. It is also a first step to move certain logic into a new lespay package. This package will contain the implementation of the lespay token sale functions, the token buying and selling logic and other components related to peer selection/prioritization and service quality evaluation. Over the long term this package will be reusable for incentivizing future protocols. Since the LES peer logic is now based on enode.Iterator, it can now use DNS-based fallback discovery to find servers. This document describes the function of the new components: https://gist.github.com/zsfelfoldi/3c7ace895234b7b345ab4f71dab102d4
583 lines
20 KiB
Go
583 lines
20 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// This file contains some shares testing functionality, common to multiple
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// different files and modules being tested.
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package les
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import (
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"context"
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"crypto/rand"
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"fmt"
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"math/big"
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"sync/atomic"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/contracts/checkpointoracle/contract"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/les/checkpointoracle"
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"github.com/ethereum/go-ethereum/les/flowcontrol"
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"github.com/ethereum/go-ethereum/light"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/params"
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)
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var (
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bankKey, _ = crypto.GenerateKey()
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bankAddr = crypto.PubkeyToAddress(bankKey.PublicKey)
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bankFunds = big.NewInt(1000000000000000000)
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userKey1, _ = crypto.GenerateKey()
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userKey2, _ = crypto.GenerateKey()
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userAddr1 = crypto.PubkeyToAddress(userKey1.PublicKey)
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userAddr2 = crypto.PubkeyToAddress(userKey2.PublicKey)
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testContractAddr common.Address
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testContractCode = common.Hex2Bytes("606060405260cc8060106000396000f360606040526000357c01000000000000000000000000000000000000000000000000000000009004806360cd2685146041578063c16431b914606b57603f565b005b6055600480803590602001909190505060a9565b6040518082815260200191505060405180910390f35b60886004808035906020019091908035906020019091905050608a565b005b80600060005083606481101560025790900160005b50819055505b5050565b6000600060005082606481101560025790900160005b5054905060c7565b91905056")
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testContractCodeDeployed = testContractCode[16:]
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testContractDeployed = uint64(2)
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testEventEmitterCode = common.Hex2Bytes("60606040523415600e57600080fd5b7f57050ab73f6b9ebdd9f76b8d4997793f48cf956e965ee070551b9ca0bb71584e60405160405180910390a160358060476000396000f3006060604052600080fd00a165627a7a723058203f727efcad8b5811f8cb1fc2620ce5e8c63570d697aef968172de296ea3994140029")
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// Checkpoint registrar relative
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registrarAddr common.Address
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signerKey, _ = crypto.GenerateKey()
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signerAddr = crypto.PubkeyToAddress(signerKey.PublicKey)
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)
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var (
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// The block frequency for creating checkpoint(only used in test)
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sectionSize = big.NewInt(128)
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// The number of confirmations needed to generate a checkpoint(only used in test).
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processConfirms = big.NewInt(1)
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// The token bucket buffer limit for testing purpose.
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testBufLimit = uint64(1000000)
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// The buffer recharging speed for testing purpose.
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testBufRecharge = uint64(1000)
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)
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/*
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contract test {
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uint256[100] data;
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function Put(uint256 addr, uint256 value) {
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data[addr] = value;
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}
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function Get(uint256 addr) constant returns (uint256 value) {
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return data[addr];
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}
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}
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*/
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// prepare pre-commits specified number customized blocks into chain.
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func prepare(n int, backend *backends.SimulatedBackend) {
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var (
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ctx = context.Background()
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signer = types.HomesteadSigner{}
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)
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for i := 0; i < n; i++ {
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switch i {
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case 0:
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// deploy checkpoint contract
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registrarAddr, _, _, _ = contract.DeployCheckpointOracle(bind.NewKeyedTransactor(bankKey), backend, []common.Address{signerAddr}, sectionSize, processConfirms, big.NewInt(1))
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// bankUser transfers some ether to user1
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nonce, _ := backend.PendingNonceAt(ctx, bankAddr)
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tx, _ := types.SignTx(types.NewTransaction(nonce, userAddr1, big.NewInt(10000), params.TxGas, nil, nil), signer, bankKey)
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backend.SendTransaction(ctx, tx)
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case 1:
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bankNonce, _ := backend.PendingNonceAt(ctx, bankAddr)
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userNonce1, _ := backend.PendingNonceAt(ctx, userAddr1)
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// bankUser transfers more ether to user1
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tx1, _ := types.SignTx(types.NewTransaction(bankNonce, userAddr1, big.NewInt(1000), params.TxGas, nil, nil), signer, bankKey)
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backend.SendTransaction(ctx, tx1)
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// user1 relays ether to user2
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tx2, _ := types.SignTx(types.NewTransaction(userNonce1, userAddr2, big.NewInt(1000), params.TxGas, nil, nil), signer, userKey1)
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backend.SendTransaction(ctx, tx2)
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// user1 deploys a test contract
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tx3, _ := types.SignTx(types.NewContractCreation(userNonce1+1, big.NewInt(0), 200000, big.NewInt(0), testContractCode), signer, userKey1)
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backend.SendTransaction(ctx, tx3)
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testContractAddr = crypto.CreateAddress(userAddr1, userNonce1+1)
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// user1 deploys a event contract
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tx4, _ := types.SignTx(types.NewContractCreation(userNonce1+2, big.NewInt(0), 200000, big.NewInt(0), testEventEmitterCode), signer, userKey1)
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backend.SendTransaction(ctx, tx4)
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case 2:
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// bankUser transfer some ether to signer
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bankNonce, _ := backend.PendingNonceAt(ctx, bankAddr)
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tx1, _ := types.SignTx(types.NewTransaction(bankNonce, signerAddr, big.NewInt(1000000000), params.TxGas, nil, nil), signer, bankKey)
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backend.SendTransaction(ctx, tx1)
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// invoke test contract
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data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001")
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tx2, _ := types.SignTx(types.NewTransaction(bankNonce+1, testContractAddr, big.NewInt(0), 100000, nil, data), signer, bankKey)
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backend.SendTransaction(ctx, tx2)
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case 3:
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// invoke test contract
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bankNonce, _ := backend.PendingNonceAt(ctx, bankAddr)
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data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002")
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tx, _ := types.SignTx(types.NewTransaction(bankNonce, testContractAddr, big.NewInt(0), 100000, nil, data), signer, bankKey)
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backend.SendTransaction(ctx, tx)
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}
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backend.Commit()
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}
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}
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// testIndexers creates a set of indexers with specified params for testing purpose.
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func testIndexers(db ethdb.Database, odr light.OdrBackend, config *light.IndexerConfig) []*core.ChainIndexer {
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var indexers [3]*core.ChainIndexer
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indexers[0] = light.NewChtIndexer(db, odr, config.ChtSize, config.ChtConfirms)
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indexers[1] = eth.NewBloomIndexer(db, config.BloomSize, config.BloomConfirms)
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indexers[2] = light.NewBloomTrieIndexer(db, odr, config.BloomSize, config.BloomTrieSize)
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// make bloomTrieIndexer as a child indexer of bloom indexer.
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indexers[1].AddChildIndexer(indexers[2])
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return indexers[:]
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}
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func newTestClientHandler(backend *backends.SimulatedBackend, odr *LesOdr, indexers []*core.ChainIndexer, db ethdb.Database, peers *serverPeerSet, ulcServers []string, ulcFraction int) *clientHandler {
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var (
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evmux = new(event.TypeMux)
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engine = ethash.NewFaker()
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gspec = core.Genesis{
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Config: params.AllEthashProtocolChanges,
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Alloc: core.GenesisAlloc{bankAddr: {Balance: bankFunds}},
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GasLimit: 100000000,
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}
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oracle *checkpointoracle.CheckpointOracle
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)
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genesis := gspec.MustCommit(db)
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chain, _ := light.NewLightChain(odr, gspec.Config, engine, nil)
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if indexers != nil {
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checkpointConfig := ¶ms.CheckpointOracleConfig{
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Address: crypto.CreateAddress(bankAddr, 0),
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Signers: []common.Address{signerAddr},
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Threshold: 1,
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}
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getLocal := func(index uint64) params.TrustedCheckpoint {
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chtIndexer := indexers[0]
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sectionHead := chtIndexer.SectionHead(index)
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return params.TrustedCheckpoint{
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SectionIndex: index,
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SectionHead: sectionHead,
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CHTRoot: light.GetChtRoot(db, index, sectionHead),
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BloomRoot: light.GetBloomTrieRoot(db, index, sectionHead),
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}
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}
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oracle = checkpointoracle.New(checkpointConfig, getLocal)
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}
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client := &LightEthereum{
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lesCommons: lesCommons{
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genesis: genesis.Hash(),
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config: ð.Config{LightPeers: 100, NetworkId: NetworkId},
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chainConfig: params.AllEthashProtocolChanges,
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iConfig: light.TestClientIndexerConfig,
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chainDb: db,
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oracle: oracle,
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chainReader: chain,
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closeCh: make(chan struct{}),
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},
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peers: peers,
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reqDist: odr.retriever.dist,
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retriever: odr.retriever,
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odr: odr,
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engine: engine,
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blockchain: chain,
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eventMux: evmux,
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}
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client.handler = newClientHandler(ulcServers, ulcFraction, nil, client)
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if client.oracle != nil {
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client.oracle.Start(backend)
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}
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return client.handler
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}
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func newTestServerHandler(blocks int, indexers []*core.ChainIndexer, db ethdb.Database, peers *clientPeerSet, clock mclock.Clock) (*serverHandler, *backends.SimulatedBackend) {
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var (
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gspec = core.Genesis{
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Config: params.AllEthashProtocolChanges,
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Alloc: core.GenesisAlloc{bankAddr: {Balance: bankFunds}},
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GasLimit: 100000000,
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}
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oracle *checkpointoracle.CheckpointOracle
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)
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genesis := gspec.MustCommit(db)
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// create a simulation backend and pre-commit several customized block to the database.
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simulation := backends.NewSimulatedBackendWithDatabase(db, gspec.Alloc, 100000000)
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prepare(blocks, simulation)
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txpoolConfig := core.DefaultTxPoolConfig
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txpoolConfig.Journal = ""
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txpool := core.NewTxPool(txpoolConfig, gspec.Config, simulation.Blockchain())
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if indexers != nil {
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checkpointConfig := ¶ms.CheckpointOracleConfig{
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Address: crypto.CreateAddress(bankAddr, 0),
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Signers: []common.Address{signerAddr},
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Threshold: 1,
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}
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getLocal := func(index uint64) params.TrustedCheckpoint {
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chtIndexer := indexers[0]
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sectionHead := chtIndexer.SectionHead(index)
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return params.TrustedCheckpoint{
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SectionIndex: index,
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SectionHead: sectionHead,
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CHTRoot: light.GetChtRoot(db, index, sectionHead),
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BloomRoot: light.GetBloomTrieRoot(db, index, sectionHead),
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}
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}
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oracle = checkpointoracle.New(checkpointConfig, getLocal)
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}
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server := &LesServer{
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lesCommons: lesCommons{
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genesis: genesis.Hash(),
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config: ð.Config{LightPeers: 100, NetworkId: NetworkId},
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chainConfig: params.AllEthashProtocolChanges,
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iConfig: light.TestServerIndexerConfig,
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chainDb: db,
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chainReader: simulation.Blockchain(),
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oracle: oracle,
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closeCh: make(chan struct{}),
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},
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peers: peers,
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servingQueue: newServingQueue(int64(time.Millisecond*10), 1),
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defParams: flowcontrol.ServerParams{
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BufLimit: testBufLimit,
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MinRecharge: testBufRecharge,
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},
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fcManager: flowcontrol.NewClientManager(nil, clock),
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}
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server.costTracker, server.freeCapacity = newCostTracker(db, server.config)
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server.costTracker.testCostList = testCostList(0) // Disable flow control mechanism.
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server.clientPool = newClientPool(db, 1, clock, nil)
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server.clientPool.setLimits(10000, 10000) // Assign enough capacity for clientpool
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server.handler = newServerHandler(server, simulation.Blockchain(), db, txpool, func() bool { return true })
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if server.oracle != nil {
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server.oracle.Start(simulation)
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}
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server.servingQueue.setThreads(4)
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server.handler.start()
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return server.handler, simulation
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}
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// testPeer is a simulated peer to allow testing direct network calls.
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type testPeer struct {
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cpeer *clientPeer
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speer *serverPeer
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net p2p.MsgReadWriter // Network layer reader/writer to simulate remote messaging
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app *p2p.MsgPipeRW // Application layer reader/writer to simulate the local side
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}
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// newTestPeer creates a new peer registered at the given protocol manager.
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func newTestPeer(t *testing.T, name string, version int, handler *serverHandler, shake bool, testCost uint64) (*testPeer, <-chan error) {
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// Create a message pipe to communicate through
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app, net := p2p.MsgPipe()
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// Generate a random id and create the peer
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var id enode.ID
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rand.Read(id[:])
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peer := newClientPeer(version, NetworkId, p2p.NewPeer(id, name, nil), net)
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// Start the peer on a new thread
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errCh := make(chan error, 1)
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go func() {
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select {
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case <-handler.closeCh:
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errCh <- p2p.DiscQuitting
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case errCh <- handler.handle(peer):
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}
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}()
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tp := &testPeer{
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app: app,
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net: net,
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cpeer: peer,
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}
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// Execute any implicitly requested handshakes and return
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if shake {
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// Customize the cost table if required.
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if testCost != 0 {
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handler.server.costTracker.testCostList = testCostList(testCost)
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}
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var (
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genesis = handler.blockchain.Genesis()
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head = handler.blockchain.CurrentHeader()
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td = handler.blockchain.GetTd(head.Hash(), head.Number.Uint64())
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)
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tp.handshake(t, td, head.Hash(), head.Number.Uint64(), genesis.Hash(), testCostList(testCost))
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}
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return tp, errCh
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}
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// close terminates the local side of the peer, notifying the remote protocol
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// manager of termination.
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func (p *testPeer) close() {
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p.app.Close()
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}
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func newTestPeerPair(name string, version int, server *serverHandler, client *clientHandler) (*testPeer, *testPeer, error) {
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// Create a message pipe to communicate through
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app, net := p2p.MsgPipe()
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// Generate a random id and create the peer
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var id enode.ID
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rand.Read(id[:])
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peer1 := newClientPeer(version, NetworkId, p2p.NewPeer(id, name, nil), net)
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peer2 := newServerPeer(version, NetworkId, false, p2p.NewPeer(id, name, nil), app)
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// Start the peer on a new thread
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errc1 := make(chan error, 1)
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errc2 := make(chan error, 1)
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go func() {
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select {
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case <-server.closeCh:
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errc1 <- p2p.DiscQuitting
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case errc1 <- server.handle(peer1):
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}
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}()
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go func() {
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select {
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case <-client.closeCh:
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errc2 <- p2p.DiscQuitting
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case errc2 <- client.handle(peer2):
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}
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}()
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// Ensure the connection is established or exits when any error occurs
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for {
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select {
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case err := <-errc1:
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return nil, nil, fmt.Errorf("Failed to establish protocol connection %v", err)
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case err := <-errc2:
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return nil, nil, fmt.Errorf("Failed to establish protocol connection %v", err)
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default:
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}
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if atomic.LoadUint32(&peer1.serving) == 1 && atomic.LoadUint32(&peer2.serving) == 1 {
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break
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}
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time.Sleep(50 * time.Millisecond)
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}
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return &testPeer{cpeer: peer1, net: net, app: app}, &testPeer{speer: peer2, net: app, app: net}, nil
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}
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// handshake simulates a trivial handshake that expects the same state from the
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// remote side as we are simulating locally.
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func (p *testPeer) handshake(t *testing.T, td *big.Int, head common.Hash, headNum uint64, genesis common.Hash, costList RequestCostList) {
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var expList keyValueList
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expList = expList.add("protocolVersion", uint64(p.cpeer.version))
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expList = expList.add("networkId", uint64(NetworkId))
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expList = expList.add("headTd", td)
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expList = expList.add("headHash", head)
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expList = expList.add("headNum", headNum)
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expList = expList.add("genesisHash", genesis)
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sendList := make(keyValueList, len(expList))
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copy(sendList, expList)
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expList = expList.add("serveHeaders", nil)
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expList = expList.add("serveChainSince", uint64(0))
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expList = expList.add("serveStateSince", uint64(0))
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expList = expList.add("serveRecentState", uint64(core.TriesInMemory-4))
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expList = expList.add("txRelay", nil)
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expList = expList.add("flowControl/BL", testBufLimit)
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expList = expList.add("flowControl/MRR", testBufRecharge)
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expList = expList.add("flowControl/MRC", costList)
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if err := p2p.ExpectMsg(p.app, StatusMsg, expList); err != nil {
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t.Fatalf("status recv: %v", err)
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}
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if err := p2p.Send(p.app, StatusMsg, sendList); err != nil {
|
|
t.Fatalf("status send: %v", err)
|
|
}
|
|
p.cpeer.fcParams = flowcontrol.ServerParams{
|
|
BufLimit: testBufLimit,
|
|
MinRecharge: testBufRecharge,
|
|
}
|
|
}
|
|
|
|
type indexerCallback func(*core.ChainIndexer, *core.ChainIndexer, *core.ChainIndexer)
|
|
|
|
// testClient represents a client for testing with necessary auxiliary fields.
|
|
type testClient struct {
|
|
clock mclock.Clock
|
|
db ethdb.Database
|
|
peer *testPeer
|
|
handler *clientHandler
|
|
|
|
chtIndexer *core.ChainIndexer
|
|
bloomIndexer *core.ChainIndexer
|
|
bloomTrieIndexer *core.ChainIndexer
|
|
}
|
|
|
|
// testServer represents a server for testing with necessary auxiliary fields.
|
|
type testServer struct {
|
|
clock mclock.Clock
|
|
backend *backends.SimulatedBackend
|
|
db ethdb.Database
|
|
peer *testPeer
|
|
handler *serverHandler
|
|
|
|
chtIndexer *core.ChainIndexer
|
|
bloomIndexer *core.ChainIndexer
|
|
bloomTrieIndexer *core.ChainIndexer
|
|
}
|
|
|
|
func newServerEnv(t *testing.T, blocks int, protocol int, callback indexerCallback, simClock bool, newPeer bool, testCost uint64) (*testServer, func()) {
|
|
db := rawdb.NewMemoryDatabase()
|
|
indexers := testIndexers(db, nil, light.TestServerIndexerConfig)
|
|
|
|
var clock mclock.Clock = &mclock.System{}
|
|
if simClock {
|
|
clock = &mclock.Simulated{}
|
|
}
|
|
handler, b := newTestServerHandler(blocks, indexers, db, newClientPeerSet(), clock)
|
|
|
|
var peer *testPeer
|
|
if newPeer {
|
|
peer, _ = newTestPeer(t, "peer", protocol, handler, true, testCost)
|
|
}
|
|
|
|
cIndexer, bIndexer, btIndexer := indexers[0], indexers[1], indexers[2]
|
|
cIndexer.Start(handler.blockchain)
|
|
bIndexer.Start(handler.blockchain)
|
|
|
|
// Wait until indexers generate enough index data.
|
|
if callback != nil {
|
|
callback(cIndexer, bIndexer, btIndexer)
|
|
}
|
|
server := &testServer{
|
|
clock: clock,
|
|
backend: b,
|
|
db: db,
|
|
peer: peer,
|
|
handler: handler,
|
|
chtIndexer: cIndexer,
|
|
bloomIndexer: bIndexer,
|
|
bloomTrieIndexer: btIndexer,
|
|
}
|
|
teardown := func() {
|
|
if newPeer {
|
|
peer.close()
|
|
peer.cpeer.close()
|
|
b.Close()
|
|
}
|
|
cIndexer.Close()
|
|
bIndexer.Close()
|
|
}
|
|
return server, teardown
|
|
}
|
|
|
|
func newClientServerEnv(t *testing.T, blocks int, protocol int, callback indexerCallback, ulcServers []string, ulcFraction int, simClock bool, connect bool) (*testServer, *testClient, func()) {
|
|
sdb, cdb := rawdb.NewMemoryDatabase(), rawdb.NewMemoryDatabase()
|
|
speers, cpeers := newServerPeerSet(), newClientPeerSet()
|
|
|
|
var clock mclock.Clock = &mclock.System{}
|
|
if simClock {
|
|
clock = &mclock.Simulated{}
|
|
}
|
|
dist := newRequestDistributor(speers, clock)
|
|
rm := newRetrieveManager(speers, dist, func() time.Duration { return time.Millisecond * 500 })
|
|
odr := NewLesOdr(cdb, light.TestClientIndexerConfig, rm)
|
|
|
|
sindexers := testIndexers(sdb, nil, light.TestServerIndexerConfig)
|
|
cIndexers := testIndexers(cdb, odr, light.TestClientIndexerConfig)
|
|
|
|
scIndexer, sbIndexer, sbtIndexer := sindexers[0], sindexers[1], sindexers[2]
|
|
ccIndexer, cbIndexer, cbtIndexer := cIndexers[0], cIndexers[1], cIndexers[2]
|
|
odr.SetIndexers(ccIndexer, cbIndexer, cbtIndexer)
|
|
|
|
server, b := newTestServerHandler(blocks, sindexers, sdb, cpeers, clock)
|
|
client := newTestClientHandler(b, odr, cIndexers, cdb, speers, ulcServers, ulcFraction)
|
|
|
|
scIndexer.Start(server.blockchain)
|
|
sbIndexer.Start(server.blockchain)
|
|
ccIndexer.Start(client.backend.blockchain)
|
|
cbIndexer.Start(client.backend.blockchain)
|
|
|
|
if callback != nil {
|
|
callback(scIndexer, sbIndexer, sbtIndexer)
|
|
}
|
|
var (
|
|
err error
|
|
speer, cpeer *testPeer
|
|
)
|
|
if connect {
|
|
done := make(chan struct{})
|
|
client.syncDone = func() { close(done) }
|
|
cpeer, speer, err = newTestPeerPair("peer", protocol, server, client)
|
|
if err != nil {
|
|
t.Fatalf("Failed to connect testing peers %v", err)
|
|
}
|
|
select {
|
|
case <-done:
|
|
case <-time.After(3 * time.Second):
|
|
t.Fatal("test peer did not connect and sync within 3s")
|
|
}
|
|
}
|
|
s := &testServer{
|
|
clock: clock,
|
|
backend: b,
|
|
db: sdb,
|
|
peer: cpeer,
|
|
handler: server,
|
|
chtIndexer: scIndexer,
|
|
bloomIndexer: sbIndexer,
|
|
bloomTrieIndexer: sbtIndexer,
|
|
}
|
|
c := &testClient{
|
|
clock: clock,
|
|
db: cdb,
|
|
peer: speer,
|
|
handler: client,
|
|
chtIndexer: ccIndexer,
|
|
bloomIndexer: cbIndexer,
|
|
bloomTrieIndexer: cbtIndexer,
|
|
}
|
|
teardown := func() {
|
|
if connect {
|
|
speer.close()
|
|
cpeer.close()
|
|
cpeer.cpeer.close()
|
|
speer.speer.close()
|
|
}
|
|
ccIndexer.Close()
|
|
cbIndexer.Close()
|
|
scIndexer.Close()
|
|
sbIndexer.Close()
|
|
b.Close()
|
|
}
|
|
return s, c, teardown
|
|
}
|