github.com/aswedchain/aswed@v1.0.1/eth/gasprice/gasprice_test.go (about)

     1  // Copyright 2020 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package gasprice
    18  
    19  import (
    20  	"context"
    21  	"math"
    22  	"math/big"
    23  	"testing"
    24  
    25  	"github.com/aswedchain/aswed/common"
    26  	"github.com/aswedchain/aswed/consensus/ethash"
    27  	"github.com/aswedchain/aswed/core"
    28  	"github.com/aswedchain/aswed/core/rawdb"
    29  	"github.com/aswedchain/aswed/core/types"
    30  	"github.com/aswedchain/aswed/core/vm"
    31  	"github.com/aswedchain/aswed/crypto"
    32  	"github.com/aswedchain/aswed/event"
    33  	"github.com/aswedchain/aswed/params"
    34  	"github.com/aswedchain/aswed/rpc"
    35  )
    36  
    37  type testBackend struct {
    38  	chain *core.BlockChain
    39  }
    40  
    41  func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
    42  	if number == rpc.LatestBlockNumber {
    43  		return b.chain.CurrentBlock().Header(), nil
    44  	}
    45  	return b.chain.GetHeaderByNumber(uint64(number)), nil
    46  }
    47  
    48  func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
    49  	if number == rpc.LatestBlockNumber {
    50  		return b.chain.CurrentBlock(), nil
    51  	}
    52  	return b.chain.GetBlockByNumber(uint64(number)), nil
    53  }
    54  
    55  func (b *testBackend) ChainConfig() *params.ChainConfig {
    56  	return b.chain.Config()
    57  }
    58  
    59  func (b *testBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
    60  	return nil
    61  }
    62  
    63  func newTestBackend(t *testing.T) *testBackend {
    64  	var (
    65  		key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
    66  		addr   = crypto.PubkeyToAddress(key.PublicKey)
    67  		gspec  = &core.Genesis{
    68  			Config: params.TestChainConfig,
    69  			Alloc:  core.GenesisAlloc{addr: {Balance: big.NewInt(math.MaxInt64)}},
    70  		}
    71  		signer = types.NewEIP155Signer(gspec.Config.ChainID)
    72  	)
    73  	engine := ethash.NewFaker()
    74  	db := rawdb.NewMemoryDatabase()
    75  	genesis, _ := gspec.Commit(db)
    76  
    77  	// Generate testing blocks
    78  	blocks, _ := core.GenerateChain(params.TestChainConfig, genesis, engine, db, 32, func(i int, b *core.BlockGen) {
    79  		b.SetCoinbase(common.Address{1})
    80  		tx, err := types.SignTx(types.NewTransaction(b.TxNonce(addr), common.HexToAddress("deadbeef"), big.NewInt(100), 21000, big.NewInt(int64(i+1)*params.GWei), nil), signer, key)
    81  		if err != nil {
    82  			t.Fatalf("failed to create tx: %v", err)
    83  		}
    84  		b.AddTx(tx)
    85  	})
    86  	// Construct testing chain
    87  	diskdb := rawdb.NewMemoryDatabase()
    88  	gspec.Commit(diskdb)
    89  	chain, err := core.NewBlockChain(diskdb, nil, params.TestChainConfig, engine, vm.Config{}, nil, nil)
    90  	if err != nil {
    91  		t.Fatalf("Failed to create local chain, %v", err)
    92  	}
    93  	chain.InsertChain(blocks)
    94  	return &testBackend{chain: chain}
    95  }
    96  
    97  func (b *testBackend) CurrentHeader() *types.Header {
    98  	return b.chain.CurrentHeader()
    99  }
   100  
   101  func (b *testBackend) GetBlockByNumber(number uint64) *types.Block {
   102  	return b.chain.GetBlockByNumber(number)
   103  }
   104  
   105  func TestSuggestPrice(t *testing.T) {
   106  	config := Config{
   107  		Blocks:     3,
   108  		Percentile: 60,
   109  		Default:    big.NewInt(params.GWei),
   110  	}
   111  	backend := newTestBackend(t)
   112  	oracle := NewOracle(backend, config)
   113  
   114  	// The gas price sampled is: 32G, 31G, 30G, 29G, 28G, 27G
   115  	got, err := oracle.SuggestPrice(context.Background())
   116  	if err != nil {
   117  		t.Fatalf("Failed to retrieve recommended gas price: %v", err)
   118  	}
   119  	expect := big.NewInt(params.GWei * int64(30))
   120  	if got.Cmp(expect) != 0 {
   121  		t.Fatalf("Gas price mismatch, want %d, got %d", expect, got)
   122  	}
   123  }