Official Go implementation of the Ethereum protocol
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go-ethereum/eth/gasprice/gasprice_test.go

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4.9 KiB

// Copyright 2020 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 gasprice
import (
"context"
"math"
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
)
type testBackend struct {
chain *core.BlockChain
}
func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
if number == rpc.LatestBlockNumber {
return b.chain.CurrentBlock().Header(), nil
}
return b.chain.GetHeaderByNumber(uint64(number)), nil
}
func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
if number == rpc.LatestBlockNumber {
return b.chain.CurrentBlock(), nil
}
return b.chain.GetBlockByNumber(uint64(number)), nil
}
func (b *testBackend) ChainConfig() *params.ChainConfig {
return b.chain.Config()
}
func newTestBackend(t *testing.T, londonBlock *big.Int) *testBackend {
var (
key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
addr = crypto.PubkeyToAddress(key.PublicKey)
gspec = &core.Genesis{
Config: params.TestChainConfig,
Alloc: core.GenesisAlloc{addr: {Balance: big.NewInt(math.MaxInt64)}},
}
signer = types.LatestSigner(gspec.Config)
)
if londonBlock != nil {
gspec.Config.LondonBlock = londonBlock
signer = types.LatestSigner(gspec.Config)
}
engine := ethash.NewFaker()
db := rawdb.NewMemoryDatabase()
genesis, _ := gspec.Commit(db)
// Generate testing blocks
blocks, _ := core.GenerateChain(gspec.Config, genesis, engine, db, 32, func(i int, b *core.BlockGen) {
b.SetCoinbase(common.Address{1})
var tx *types.Transaction
if londonBlock != nil && b.Number().Cmp(londonBlock) >= 0 {
txdata := &types.DynamicFeeTx{
ChainID: gspec.Config.ChainID,
Nonce: b.TxNonce(addr),
To: &common.Address{},
Gas: 30000,
GasFeeCap: big.NewInt(100 * params.GWei),
GasTipCap: big.NewInt(int64(i+1) * params.GWei),
Data: []byte{},
}
tx = types.NewTx(txdata)
} else {
txdata := &types.LegacyTx{
Nonce: b.TxNonce(addr),
To: &common.Address{},
Gas: 21000,
GasPrice: big.NewInt(int64(i+1) * params.GWei),
Value: big.NewInt(100),
Data: []byte{},
}
tx = types.NewTx(txdata)
}
tx, err := types.SignTx(tx, signer, key)
if err != nil {
t.Fatalf("failed to create tx: %v", err)
}
b.AddTx(tx)
})
// Construct testing chain
diskdb := rawdb.NewMemoryDatabase()
gspec.Commit(diskdb)
chain, err := core.NewBlockChain(diskdb, nil, gspec.Config, engine, vm.Config{}, nil, nil)
if err != nil {
t.Fatalf("Failed to create local chain, %v", err)
}
chain.InsertChain(blocks)
return &testBackend{chain: chain}
}
func (b *testBackend) CurrentHeader() *types.Header {
return b.chain.CurrentHeader()
}
func (b *testBackend) GetBlockByNumber(number uint64) *types.Block {
return b.chain.GetBlockByNumber(number)
}
func TestSuggestTipCap(t *testing.T) {
config := Config{
Blocks: 3,
Percentile: 60,
Default: big.NewInt(params.GWei),
}
var cases = []struct {
fork *big.Int // London fork number
expect *big.Int // Expected gasprice suggestion
}{
{nil, big.NewInt(params.GWei * int64(30))},
{big.NewInt(0), big.NewInt(params.GWei * int64(30))}, // Fork point in genesis
{big.NewInt(1), big.NewInt(params.GWei * int64(30))}, // Fork point in first block
{big.NewInt(32), big.NewInt(params.GWei * int64(30))}, // Fork point in last block
{big.NewInt(33), big.NewInt(params.GWei * int64(30))}, // Fork point in the future
}
for _, c := range cases {
backend := newTestBackend(t, c.fork)
oracle := NewOracle(backend, config)
// The gas price sampled is: 32G, 31G, 30G, 29G, 28G, 27G
got, err := oracle.SuggestTipCap(context.Background())
if err != nil {
t.Fatalf("Failed to retrieve recommended gas price: %v", err)
}
if got.Cmp(c.expect) != 0 {
t.Fatalf("Gas price mismatch, want %d, got %d", c.expect, got)
}
}
}