github.com/klaytn/klaytn@v1.12.1/blockchain/chain_makers_test.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2015 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from core/chain_makers_test.go (2018/06/04).
    19  // Modified and improved for the klaytn development.
    20  
    21  package blockchain
    22  
    23  // TODO-Klaytn-FailedTest Fails because this test assumes Homestead fee.
    24  /*
    25  import (
    26  	"fmt"
    27  	"math/big"
    28  
    29  	"github.com/klaytn/klaytn/consensus/gxhash"
    30  	"github.com/klaytn/klaytn/blockchain/types"
    31  	"github.com/klaytn/klaytn/blockchain/vm"
    32  	"github.com/klaytn/klaytn/crypto"
    33  	"github.com/klaytn/klaytn/storage/database"
    34  	"github.com/klaytn/klaytn/params"
    35  )
    36  
    37  func ExampleGenerateChain() {
    38  	var (
    39  		key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
    40  		key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
    41  		key3, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
    42  		addr1   = crypto.PubkeyToAddress(key1.PublicKey)
    43  		addr2   = crypto.PubkeyToAddress(key2.PublicKey)
    44  		addr3   = crypto.PubkeyToAddress(key3.PublicKey)
    45  		db      = database.NewMemoryDBManager()
    46  	)
    47  
    48  	// Ensure that key1 has some funds in the genesis block.
    49  	gspec := &Genesis{
    50  		Config: &params.ChainConfig{},
    51  		Alloc:  GenesisAlloc{addr1: {Balance: big.NewInt(1000000)}},
    52  	}
    53  	genesis := gspec.MustCommit(db)
    54  
    55  	// This call generates a chain of 5 blocks. The function runs for
    56  	// each block and adds different features to gen based on the
    57  	// block index.
    58  	signer := types.HomesteadSigner{}
    59  	chain, _ := GenerateChain(gspec.Config, genesis, gxhash.NewFaker(), db, 5, func(i int, gen *BlockGen) {
    60  		switch i {
    61  		case 0:
    62  			// In block 1, addr1 sends addr2 some KLAY.
    63  			tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
    64  			gen.AddTx(tx)
    65  		case 1:
    66  			// In block 2, addr1 sends some more KLAY to addr2.
    67  			// addr2 passes it on to addr3.
    68  			tx1, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(1000), params.TxGas, nil, nil), signer, key1)
    69  			tx2, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key2)
    70  			gen.AddTx(tx1)
    71  			gen.AddTx(tx2)
    72  		case 2:
    73  			// Block 3 is empty but was mined by addr3.
    74  			gen.SetCoinbase(addr3)
    75  			gen.SetExtra([]byte("yeehaw"))
    76  		case 3:
    77  			// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
    78  			//b2 := gen.PrevBlock(1).Header()
    79  			//b2.Extra = []byte("foo")
    80  			//gen.AddUncle(b2)
    81  			//b3 := gen.PrevBlock(2).Header()
    82  			//b3.Extra = []byte("foo")
    83  			//gen.AddUncle(b3)
    84  		}
    85  	})
    86  
    87  	// Import the chain. This runs all block validation rules.
    88  	blockchain, _ := NewBlockChain(db, nil, gspec.Config, gxhash.NewFaker(), vm.Config{})
    89  	defer blockchain.Stop()
    90  
    91  	if i, err := blockchain.InsertChain(chain); err != nil {
    92  		fmt.Printf("insert error (block %d): %v\n", chain[i].NumberU64(), err)
    93  		return
    94  	}
    95  
    96  	state, _ := blockchain.State()
    97  	fmt.Printf("last block: #%d\n", blockchain.CurrentBlock().Number())
    98  	fmt.Println("balance of addr1:", state.GetBalance(addr1))
    99  	fmt.Println("balance of addr2:", state.GetBalance(addr2))
   100  	fmt.Println("balance of addr3:", state.GetBalance(addr3))
   101  	// Output:
   102  	// last block: #5
   103  	// balance of addr1: 989000
   104  	// balance of addr2: 10000
   105  	// balance of addr3: 19687500000000001000
   106  }
   107  */