231 lines
6.9 KiB
Go
231 lines
6.9 KiB
Go
// Copyright 2020 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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package gasprice
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import (
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"context"
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"errors"
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"math"
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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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/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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const testHead = 32
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type testBackend struct {
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chain *core.BlockChain
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pending bool // pending block available
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}
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func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
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if number > testHead {
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return nil, nil
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}
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if number == rpc.EarliestBlockNumber {
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number = 0
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}
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if number == rpc.FinalizedBlockNumber {
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header := b.chain.CurrentFinalBlock()
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if header == nil {
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return nil, errors.New("finalized block not found")
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}
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number = rpc.BlockNumber(header.Number.Uint64())
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}
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if number == rpc.SafeBlockNumber {
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header := b.chain.CurrentSafeBlock()
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if header == nil {
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return nil, errors.New("safe block not found")
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}
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number = rpc.BlockNumber(header.Number.Uint64())
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}
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if number == rpc.LatestBlockNumber {
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number = testHead
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}
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if number == rpc.PendingBlockNumber {
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if b.pending {
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number = testHead + 1
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} else {
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return nil, nil
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}
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}
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return b.chain.GetHeaderByNumber(uint64(number)), nil
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}
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func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
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if number > testHead {
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return nil, nil
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}
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if number == rpc.EarliestBlockNumber {
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number = 0
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}
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if number == rpc.FinalizedBlockNumber {
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number = rpc.BlockNumber(b.chain.CurrentFinalBlock().Number.Uint64())
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}
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if number == rpc.SafeBlockNumber {
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number = rpc.BlockNumber(b.chain.CurrentSafeBlock().Number.Uint64())
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}
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if number == rpc.LatestBlockNumber {
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number = testHead
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}
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if number == rpc.PendingBlockNumber {
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if b.pending {
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number = testHead + 1
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} else {
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return nil, nil
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}
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}
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return b.chain.GetBlockByNumber(uint64(number)), nil
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}
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func (b *testBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
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return b.chain.GetReceiptsByHash(hash), nil
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}
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func (b *testBackend) PendingBlockAndReceipts() (*types.Block, types.Receipts) {
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if b.pending {
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block := b.chain.GetBlockByNumber(testHead + 1)
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return block, b.chain.GetReceiptsByHash(block.Hash())
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}
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return nil, nil
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}
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func (b *testBackend) ChainConfig() *params.ChainConfig {
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return b.chain.Config()
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}
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func (b *testBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
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return nil
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}
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func (b *testBackend) teardown() {
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b.chain.Stop()
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}
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// newTestBackend creates a test backend. OBS: don't forget to invoke tearDown
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// after use, otherwise the blockchain instance will mem-leak via goroutines.
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func newTestBackend(t *testing.T, londonBlock *big.Int, pending bool) *testBackend {
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var (
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key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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addr = crypto.PubkeyToAddress(key.PublicKey)
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config = *params.TestChainConfig // needs copy because it is modified below
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gspec = &core.Genesis{
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Config: &config,
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Alloc: types.GenesisAlloc{addr: {Balance: big.NewInt(math.MaxInt64)}},
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}
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signer = types.LatestSigner(gspec.Config)
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)
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config.LondonBlock = londonBlock
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config.ArrowGlacierBlock = londonBlock
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config.GrayGlacierBlock = londonBlock
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config.GibbsBlock = nil
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config.LubanBlock = nil
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config.PlatoBlock = nil
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config.HertzBlock = nil
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config.HertzfixBlock = nil
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config.TerminalTotalDifficulty = common.Big0
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engine := ethash.NewFaker()
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// Generate testing blocks
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_, blocks, _ := core.GenerateChainWithGenesis(gspec, engine, testHead+1, func(i int, b *core.BlockGen) {
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b.SetCoinbase(common.Address{1})
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var txdata types.TxData
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if londonBlock != nil && b.Number().Cmp(londonBlock) >= 0 {
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txdata = &types.DynamicFeeTx{
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ChainID: gspec.Config.ChainID,
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Nonce: b.TxNonce(addr),
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To: &common.Address{},
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Gas: 30000,
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GasFeeCap: big.NewInt(100 * params.GWei),
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GasTipCap: big.NewInt(int64(i+1) * params.GWei),
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Data: []byte{},
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}
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} else {
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txdata = &types.LegacyTx{
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Nonce: b.TxNonce(addr),
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To: &common.Address{},
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Gas: 21000,
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GasPrice: big.NewInt(int64(i+1) * params.GWei),
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Value: big.NewInt(100),
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Data: []byte{},
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}
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}
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b.AddTx(types.MustSignNewTx(key, signer, txdata))
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})
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// Construct testing chain
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chain, err := core.NewBlockChain(rawdb.NewMemoryDatabase(), &core.CacheConfig{TrieCleanNoPrefetch: true}, gspec, nil, engine, vm.Config{}, nil, nil)
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if err != nil {
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t.Fatalf("Failed to create local chain, %v", err)
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}
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_, err = chain.InsertChain(blocks)
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if err != nil {
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t.Fatalf("Failed to insert blocks, %v", err)
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}
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return &testBackend{chain: chain, pending: pending}
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}
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func (b *testBackend) CurrentHeader() *types.Header {
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return b.chain.CurrentHeader()
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}
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func (b *testBackend) GetBlockByNumber(number uint64) *types.Block {
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return b.chain.GetBlockByNumber(number)
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}
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func TestSuggestTipCap(t *testing.T) {
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config := Config{
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Blocks: 3,
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Percentile: 60,
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Default: big.NewInt(params.GWei),
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}
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var cases = []struct {
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fork *big.Int // London fork number
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expect *big.Int // Expected gasprice suggestion
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}{
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{nil, big.NewInt(params.GWei * int64(30))},
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{big.NewInt(0), big.NewInt(params.GWei * int64(30))}, // Fork point in genesis
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{big.NewInt(1), big.NewInt(params.GWei * int64(30))}, // Fork point in first block
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{big.NewInt(32), big.NewInt(params.GWei * int64(30))}, // Fork point in last block
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{big.NewInt(33), big.NewInt(params.GWei * int64(30))}, // Fork point in the future
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}
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for _, c := range cases {
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backend := newTestBackend(t, c.fork, false)
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oracle := NewOracle(backend, config)
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// The gas price sampled is: 32G, 31G, 30G, 29G, 28G, 27G
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got, err := oracle.SuggestTipCap(context.Background())
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backend.teardown()
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if err != nil {
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t.Fatalf("Failed to retrieve recommended gas price: %v", err)
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}
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if got.Cmp(c.expect) != 0 {
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t.Fatalf("Gas price mismatch, want %d, got %d", c.expect, got)
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}
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}
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}
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