core: add GenerateChain, GenesisBlockForTesting
This commit is contained in:
Felix Lange
Jeffrey Wilcke
parent
1d42888d30
commit
ceaf1c080b
@ -27,16 +27,17 @@ func proc() (*BlockProcessor, *ChainManager) {
|
||||
|
||||
func TestNumber(t *testing.T) {
|
||||
pow := ezp.New()
|
||||
_, chain := proc()
|
||||
|
||||
bp, chain := proc()
|
||||
header := makeHeader(chain.Genesis(), 0, bp.db, 0)
|
||||
statedb := state.New(chain.Genesis().Root(), chain.stateDb)
|
||||
header := makeHeader(chain.Genesis(), statedb)
|
||||
header.Number = big.NewInt(3)
|
||||
err := ValidateHeader(pow, header, chain.Genesis().Header(), false)
|
||||
if err != BlockNumberErr {
|
||||
t.Errorf("expected block number error, got %q", err)
|
||||
}
|
||||
|
||||
header = makeHeader(chain.Genesis(), 0, bp.db, 0)
|
||||
header = makeHeader(chain.Genesis(), statedb)
|
||||
err = ValidateHeader(pow, header, chain.Genesis().Header(), false)
|
||||
if err == BlockNumberErr {
|
||||
t.Errorf("didn't expect block number error")
|
||||
|
||||
@ -1,7 +1,6 @@
|
||||
package core
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"math/big"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
@ -11,7 +10,8 @@ import (
|
||||
"github.com/ethereum/go-ethereum/pow"
|
||||
)
|
||||
|
||||
// So we can generate blocks easily
|
||||
// FakePow is a non-validating proof of work implementation.
|
||||
// It returns true from Verify for any block.
|
||||
type FakePow struct{}
|
||||
|
||||
func (f FakePow) Search(block pow.Block, stop <-chan struct{}) (uint64, []byte) {
|
||||
@ -23,69 +23,125 @@ func (f FakePow) Turbo(bool) {}
|
||||
|
||||
// So we can deterministically seed different blockchains
|
||||
var (
|
||||
CanonicalSeed = 1
|
||||
ForkSeed = 2
|
||||
canonicalSeed = 1
|
||||
forkSeed = 2
|
||||
)
|
||||
|
||||
// Utility functions for making chains on the fly
|
||||
// Exposed for sake of testing from other packages (eg. go-ethash)
|
||||
func MakeBlock(bman *BlockProcessor, parent *types.Block, i int, db common.Database, seed int) *types.Block {
|
||||
return types.NewBlock(makeHeader(parent, i, db, seed), nil, nil, nil)
|
||||
// BlockGen creates blocks for testing.
|
||||
// See GenerateChain for a detailed explanation.
|
||||
type BlockGen struct {
|
||||
i int
|
||||
parent *types.Block
|
||||
chain []*types.Block
|
||||
header *types.Header
|
||||
statedb *state.StateDB
|
||||
|
||||
coinbase *state.StateObject
|
||||
txs []*types.Transaction
|
||||
receipts []*types.Receipt
|
||||
uncles []*types.Header
|
||||
}
|
||||
|
||||
func MakeChain(bman *BlockProcessor, parent *types.Block, max int, db common.Database, seed int) types.Blocks {
|
||||
return makeChain(bman, parent, max, db, seed)
|
||||
}
|
||||
|
||||
func NewChainMan(block *types.Block, eventMux *event.TypeMux, db common.Database) *ChainManager {
|
||||
return newChainManager(block, eventMux, db)
|
||||
}
|
||||
|
||||
func NewBlockProc(db common.Database, cman *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
|
||||
return newBlockProcessor(db, cman, eventMux)
|
||||
}
|
||||
|
||||
func NewCanonical(n int, db common.Database) (*BlockProcessor, error) {
|
||||
return newCanonical(n, db)
|
||||
}
|
||||
|
||||
// makeHeader creates the header for a new empty block, simulating
|
||||
// what miner would do. We seed chains by the first byte of the coinbase.
|
||||
func makeHeader(parent *types.Block, i int, db common.Database, seed int) *types.Header {
|
||||
var addr common.Address
|
||||
addr[0], addr[19] = byte(seed), byte(i) // 'random' coinbase
|
||||
time := parent.Time() + 10 // block time is fixed at 10 seconds
|
||||
|
||||
// ensure that the block's coinbase has the block reward in the state.
|
||||
state := state.New(parent.Root(), db)
|
||||
cbase := state.GetOrNewStateObject(addr)
|
||||
cbase.SetGasLimit(CalcGasLimit(parent))
|
||||
cbase.AddBalance(BlockReward)
|
||||
state.Update()
|
||||
|
||||
return &types.Header{
|
||||
Root: state.Root(),
|
||||
ParentHash: parent.Hash(),
|
||||
Coinbase: addr,
|
||||
Difficulty: CalcDifficulty(time, parent.Time(), parent.Difficulty()),
|
||||
Number: new(big.Int).Add(parent.Number(), common.Big1),
|
||||
Time: uint64(time),
|
||||
GasLimit: CalcGasLimit(parent),
|
||||
}
|
||||
}
|
||||
|
||||
// makeChain creates a valid chain of empty blocks.
|
||||
func makeChain(bman *BlockProcessor, parent *types.Block, max int, db common.Database, seed int) types.Blocks {
|
||||
bman.bc.currentBlock = parent
|
||||
blocks := make(types.Blocks, max)
|
||||
for i := 0; i < max; i++ {
|
||||
block := types.NewBlock(makeHeader(parent, i, db, seed), nil, nil, nil)
|
||||
// Use ProcessWithParent to verify that we have produced a valid block.
|
||||
_, err := bman.processWithParent(block, parent)
|
||||
if err != nil {
|
||||
fmt.Println("process with parent failed", err)
|
||||
panic(err)
|
||||
// SetCoinbase sets the coinbase of the generated block.
|
||||
// It can be called at most once.
|
||||
func (b *BlockGen) SetCoinbase(addr common.Address) {
|
||||
if b.coinbase != nil {
|
||||
if len(b.txs) > 0 {
|
||||
panic("coinbase must be set before adding transactions")
|
||||
}
|
||||
panic("coinbase can only be set once")
|
||||
}
|
||||
b.header.Coinbase = addr
|
||||
b.coinbase = b.statedb.GetOrNewStateObject(addr)
|
||||
b.coinbase.SetGasLimit(b.header.GasLimit)
|
||||
}
|
||||
|
||||
// SetExtra sets the extra data field of the generated block.
|
||||
func (b *BlockGen) SetExtra(data []byte) {
|
||||
b.header.Extra = data
|
||||
}
|
||||
|
||||
// AddTx adds a transaction to the generated block. If no coinbase has
|
||||
// been set, the block's coinbase is set to the zero address.
|
||||
//
|
||||
// AddTx panics if the transaction cannot be executed. In addition to
|
||||
// the protocol-imposed limitations (gas limit, etc.), there are some
|
||||
// further limitations on the content of transactions that can be
|
||||
// added. Notably, contract code relying on the BLOCKHASH instruction
|
||||
// will panic during execution.
|
||||
func (b *BlockGen) AddTx(tx *types.Transaction) {
|
||||
if b.coinbase == nil {
|
||||
b.SetCoinbase(common.Address{})
|
||||
}
|
||||
_, gas, err := ApplyMessage(NewEnv(b.statedb, nil, tx, b.header), tx, b.coinbase)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
b.statedb.Update()
|
||||
b.header.GasUsed.Add(b.header.GasUsed, gas)
|
||||
receipt := types.NewReceipt(b.statedb.Root().Bytes(), b.header.GasUsed)
|
||||
logs := b.statedb.GetLogs(tx.Hash())
|
||||
receipt.SetLogs(logs)
|
||||
receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
|
||||
b.txs = append(b.txs, tx)
|
||||
b.receipts = append(b.receipts, receipt)
|
||||
}
|
||||
|
||||
// TxNonce returns the next valid transaction nonce for the
|
||||
// account at addr. It panics if the account does not exist.
|
||||
func (b *BlockGen) TxNonce(addr common.Address) uint64 {
|
||||
if !b.statedb.HasAccount(addr) {
|
||||
panic("account does not exist")
|
||||
}
|
||||
return b.statedb.GetNonce(addr)
|
||||
}
|
||||
|
||||
// AddUncle adds an uncle header to the generated block.
|
||||
func (b *BlockGen) AddUncle(h *types.Header) {
|
||||
b.uncles = append(b.uncles, h)
|
||||
}
|
||||
|
||||
// PrevBlock returns a previously generated block by number. It panics if
|
||||
// num is greater or equal to the number of the block being generated.
|
||||
// For index -1, PrevBlock returns the parent block given to GenerateChain.
|
||||
func (b *BlockGen) PrevBlock(index int) *types.Block {
|
||||
if index >= b.i {
|
||||
panic("block index out of range")
|
||||
}
|
||||
if index == -1 {
|
||||
return b.parent
|
||||
}
|
||||
return b.chain[index]
|
||||
}
|
||||
|
||||
// GenerateChain creates a chain of n blocks. The first block's
|
||||
// parent will be the provided parent. db is used to store
|
||||
// intermediate states and should contain the parent's state trie.
|
||||
//
|
||||
// The generator function is called with a new block generator for
|
||||
// every block. Any transactions and uncles added to the generator
|
||||
// become part of the block. If gen is nil, the blocks will be empty
|
||||
// and their coinbase will be the zero address.
|
||||
//
|
||||
// Blocks created by GenerateChain do not contain valid proof of work
|
||||
// values. Inserting them into ChainManager requires use of FakePow or
|
||||
// a similar non-validating proof of work implementation.
|
||||
func GenerateChain(parent *types.Block, db common.Database, n int, gen func(int, *BlockGen)) []*types.Block {
|
||||
statedb := state.New(parent.Root(), db)
|
||||
blocks := make(types.Blocks, n)
|
||||
genblock := func(i int, h *types.Header) *types.Block {
|
||||
b := &BlockGen{parent: parent, i: i, chain: blocks, header: h, statedb: statedb}
|
||||
if gen != nil {
|
||||
gen(i, b)
|
||||
}
|
||||
AccumulateRewards(statedb, h, b.uncles)
|
||||
statedb.Update()
|
||||
h.Root = statedb.Root()
|
||||
return types.NewBlock(h, b.txs, b.uncles, b.receipts)
|
||||
}
|
||||
for i := 0; i < n; i++ {
|
||||
header := makeHeader(parent, statedb)
|
||||
block := genblock(i, header)
|
||||
block.Td = CalcTD(block, parent)
|
||||
blocks[i] = block
|
||||
parent = block
|
||||
@ -93,41 +149,38 @@ func makeChain(bman *BlockProcessor, parent *types.Block, max int, db common.Dat
|
||||
return blocks
|
||||
}
|
||||
|
||||
// Create a new chain manager starting from given block
|
||||
// Effectively a fork factory
|
||||
func newChainManager(block *types.Block, eventMux *event.TypeMux, db common.Database) *ChainManager {
|
||||
genesis := GenesisBlock(0, db)
|
||||
bc := &ChainManager{blockDb: db, stateDb: db, genesisBlock: genesis, eventMux: eventMux, pow: FakePow{}}
|
||||
bc.txState = state.ManageState(state.New(genesis.Root(), db))
|
||||
bc.futureBlocks = NewBlockCache(1000)
|
||||
if block == nil {
|
||||
bc.Reset()
|
||||
} else {
|
||||
bc.currentBlock = block
|
||||
bc.td = block.Td
|
||||
func makeHeader(parent *types.Block, state *state.StateDB) *types.Header {
|
||||
time := parent.Time() + 10 // block time is fixed at 10 seconds
|
||||
return &types.Header{
|
||||
Root: state.Root(),
|
||||
ParentHash: parent.Hash(),
|
||||
Coinbase: parent.Coinbase(),
|
||||
Difficulty: CalcDifficulty(time, parent.Time(), parent.Difficulty()),
|
||||
GasLimit: CalcGasLimit(parent),
|
||||
GasUsed: new(big.Int),
|
||||
Number: new(big.Int).Add(parent.Number(), common.Big1),
|
||||
Time: uint64(time),
|
||||
}
|
||||
return bc
|
||||
}
|
||||
|
||||
// block processor with fake pow
|
||||
func newBlockProcessor(db common.Database, cman *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
|
||||
chainMan := newChainManager(nil, eventMux, db)
|
||||
bman := NewBlockProcessor(db, db, FakePow{}, chainMan, eventMux)
|
||||
return bman
|
||||
}
|
||||
|
||||
// Make a new, deterministic canonical chain by running InsertChain
|
||||
// on result of makeChain.
|
||||
// newCanonical creates a new deterministic canonical chain by running
|
||||
// InsertChain on the result of makeChain.
|
||||
func newCanonical(n int, db common.Database) (*BlockProcessor, error) {
|
||||
eventMux := &event.TypeMux{}
|
||||
|
||||
bman := newBlockProcessor(db, newChainManager(nil, eventMux, db), eventMux)
|
||||
evmux := &event.TypeMux{}
|
||||
chainman, _ := NewChainManager(GenesisBlock(0, db), db, db, FakePow{}, evmux)
|
||||
bman := NewBlockProcessor(db, db, FakePow{}, chainman, evmux)
|
||||
bman.bc.SetProcessor(bman)
|
||||
parent := bman.bc.CurrentBlock()
|
||||
if n == 0 {
|
||||
return bman, nil
|
||||
}
|
||||
lchain := makeChain(bman, parent, n, db, CanonicalSeed)
|
||||
lchain := makeChain(parent, n, db, canonicalSeed)
|
||||
_, err := bman.bc.InsertChain(lchain)
|
||||
return bman, err
|
||||
}
|
||||
|
||||
func makeChain(parent *types.Block, n int, db common.Database, seed int) []*types.Block {
|
||||
return GenerateChain(parent, db, n, func(i int, b *BlockGen) {
|
||||
b.SetCoinbase(common.Address{0: byte(seed), 19: byte(i)})
|
||||
})
|
||||
}
|
||||
|
||||
78
core/chain_makers_test.go
Normal file
78
core/chain_makers_test.go
Normal file
@ -0,0 +1,78 @@
|
||||
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() {
|
||||
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 := GenesisBlockForTesting(db, 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{}
|
||||
chainman, _ := NewChainManager(genesis, db, db, FakePow{}, evmux)
|
||||
chainman.SetProcessor(NewBlockProcessor(db, db, FakePow{}, chainman, evmux))
|
||||
if i, err := chainman.InsertChain(chain); err != nil {
|
||||
fmt.Printf("insert error (block %d): %v\n", i, err)
|
||||
return
|
||||
}
|
||||
|
||||
state := chainman.State()
|
||||
fmt.Printf("last block: #%d\n", chainman.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: 5906250000000001000
|
||||
}
|
||||
@ -67,7 +67,7 @@ func testFork(t *testing.T, bman *BlockProcessor, i, N int, f func(td1, td2 *big
|
||||
|
||||
// extend the fork
|
||||
parent := bman2.bc.CurrentBlock()
|
||||
chainB := makeChain(bman2, parent, N, db, ForkSeed)
|
||||
chainB := makeChain(parent, N, db, forkSeed)
|
||||
_, err = bman2.bc.InsertChain(chainB)
|
||||
if err != nil {
|
||||
t.Fatal("Insert chain error for fork:", err)
|
||||
@ -256,7 +256,7 @@ func TestBrokenChain(t *testing.T) {
|
||||
}
|
||||
bman2.bc.SetProcessor(bman2)
|
||||
parent := bman2.bc.CurrentBlock()
|
||||
chainB := makeChain(bman2, parent, 5, db2, ForkSeed)
|
||||
chainB := makeChain(parent, 5, db2, forkSeed)
|
||||
chainB = chainB[1:]
|
||||
_, err = testChain(chainB, bman)
|
||||
if err == nil {
|
||||
@ -444,7 +444,7 @@ func TestInsertNonceError(t *testing.T) {
|
||||
genesis := GenesisBlock(0, db)
|
||||
bc := chm(genesis, db)
|
||||
bc.processor = NewBlockProcessor(db, db, bc.pow, bc, bc.eventMux)
|
||||
blocks := makeChain(bc.processor.(*BlockProcessor), bc.currentBlock, i, db, 0)
|
||||
blocks := makeChain(bc.currentBlock, i, db, 0)
|
||||
|
||||
fail := rand.Int() % len(blocks)
|
||||
failblock := blocks[fail]
|
||||
|
||||
@ -3,6 +3,7 @@ package core
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"math/big"
|
||||
"os"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
@ -56,3 +57,20 @@ var GenesisAccounts = []byte(`{
|
||||
"e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
|
||||
"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"}
|
||||
}`)
|
||||
|
||||
// GenesisBlockForTesting creates a block in which addr has the given wei balance.
|
||||
// The state trie of the block is written to db.
|
||||
func GenesisBlockForTesting(db common.Database, addr common.Address, balance *big.Int) *types.Block {
|
||||
statedb := state.New(common.Hash{}, db)
|
||||
obj := statedb.GetOrNewStateObject(addr)
|
||||
obj.SetBalance(balance)
|
||||
statedb.Update()
|
||||
statedb.Sync()
|
||||
block := types.NewBlock(&types.Header{
|
||||
Difficulty: params.GenesisDifficulty,
|
||||
GasLimit: params.GenesisGasLimit,
|
||||
Root: statedb.Root(),
|
||||
}, nil, nil, nil)
|
||||
block.Td = params.GenesisDifficulty
|
||||
return block
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user