mirror of https://github.com/status-im/op-geth.git
97 lines
3.7 KiB
Go
97 lines
3.7 KiB
Go
// Copyright 2015 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 core
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
func ExampleGenerateChain() {
|
|
params.MinGasLimit = big.NewInt(125000) // Minimum the gas limit may ever be.
|
|
params.GenesisGasLimit = big.NewInt(3141592) // Gas limit of the Genesis block.
|
|
|
|
var (
|
|
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
|
|
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
|
|
key3, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
|
|
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
|
|
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
|
|
addr3 = crypto.PubkeyToAddress(key3.PublicKey)
|
|
db, _ = ethdb.NewMemDatabase()
|
|
)
|
|
|
|
// Ensure that key1 has some funds in the genesis block.
|
|
genesis := WriteGenesisBlockForTesting(db, GenesisAccount{addr1, big.NewInt(1000000)})
|
|
|
|
// This call generates a chain of 5 blocks. The function runs for
|
|
// each block and adds different features to gen based on the
|
|
// block index.
|
|
chain, _ := GenerateChain(genesis, db, 5, func(i int, gen *BlockGen) {
|
|
switch i {
|
|
case 0:
|
|
// In block 1, addr1 sends addr2 some ether.
|
|
tx, _ := types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(key1)
|
|
gen.AddTx(tx)
|
|
case 1:
|
|
// In block 2, addr1 sends some more ether to addr2.
|
|
// addr2 passes it on to addr3.
|
|
tx1, _ := types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(key1)
|
|
tx2, _ := types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(key2)
|
|
gen.AddTx(tx1)
|
|
gen.AddTx(tx2)
|
|
case 2:
|
|
// Block 3 is empty but was mined by addr3.
|
|
gen.SetCoinbase(addr3)
|
|
gen.SetExtra([]byte("yeehaw"))
|
|
case 3:
|
|
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
|
|
b2 := gen.PrevBlock(1).Header()
|
|
b2.Extra = []byte("foo")
|
|
gen.AddUncle(b2)
|
|
b3 := gen.PrevBlock(2).Header()
|
|
b3.Extra = []byte("foo")
|
|
gen.AddUncle(b3)
|
|
}
|
|
})
|
|
|
|
// Import the chain. This runs all block validation rules.
|
|
evmux := &event.TypeMux{}
|
|
blockchain, _ := NewBlockChain(db, FakePow{}, evmux)
|
|
if i, err := blockchain.InsertChain(chain); err != nil {
|
|
fmt.Printf("insert error (block %d): %v\n", i, err)
|
|
return
|
|
}
|
|
|
|
state, _ := blockchain.State()
|
|
fmt.Printf("last block: #%d\n", blockchain.CurrentBlock().Number())
|
|
fmt.Println("balance of addr1:", state.GetBalance(addr1))
|
|
fmt.Println("balance of addr2:", state.GetBalance(addr2))
|
|
fmt.Println("balance of addr3:", state.GetBalance(addr3))
|
|
// Output:
|
|
// last block: #5
|
|
// balance of addr1: 989000
|
|
// balance of addr2: 10000
|
|
// balance of addr3: 19687500000000001000
|
|
}
|