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test_blockchain.go
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test_blockchain.go
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// (c) 2020-2021, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package core
import (
"fmt"
"math/big"
"strings"
"testing"
"github.com/ava-labs/coreth/consensus/dummy"
"github.com/ava-labs/coreth/core/rawdb"
"github.com/ava-labs/coreth/core/state"
"github.com/ava-labs/coreth/core/types"
"github.com/ava-labs/coreth/ethdb"
"github.com/ava-labs/coreth/params"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
type ChainTest struct {
Name string
testFunc func(
t *testing.T,
create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error),
)
}
var tests = []ChainTest{
{
"InsertChainAcceptSingleBlock",
TestInsertChainAcceptSingleBlock,
},
{
"InsertForkedChain",
TestInsertLongForkedChain,
},
{
"AcceptNonCanonicalBlock",
TestAcceptNonCanonicalBlock,
},
{
"SetPreferenceRewind",
TestSetPreferenceRewind,
},
{
"BuildOnVariousStages",
TestBuildOnVariousStages,
},
{
"EmptyBlocks",
TestEmptyBlocks,
},
{
"AcceptBlockIdenticalStateRoot",
TestAcceptBlockIdenticalStateRoot,
},
{
"ReprocessAcceptBlockIdenticalStateRoot",
TestReprocessAcceptBlockIdenticalStateRoot,
},
{
"GenerateChainInvalidBlockFee",
TestGenerateChainInvalidBlockFee,
},
{
"InsertChainInvalidBlockFee",
TestInsertChainInvalidBlockFee,
},
{
"InsertChainValidBlockFee",
TestInsertChainValidBlockFee,
},
}
func copyMemDB(db ethdb.Database) (ethdb.Database, error) {
newDB := rawdb.NewMemoryDatabase()
iter := db.NewIterator(nil, nil)
defer iter.Release()
for iter.Next() {
if err := newDB.Put(iter.Key(), iter.Value()); err != nil {
return nil, err
}
}
return newDB, nil
}
// checkBlockChainState creates a new BlockChain instance and checks that exporting each block from
// genesis to last acceptd from the original instance yields the same last accepted block and state
// root.
// Additionally, create another BlockChain instance from [originalDB] to ensure that BlockChain is
// persisted correctly through a restart.
func checkBlockChainState(
t *testing.T,
bc *BlockChain,
genesis *Genesis,
originalDB ethdb.Database,
create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error),
checkState func(sdb *state.StateDB) error,
) (*BlockChain, *BlockChain, *BlockChain) {
var (
chainConfig = bc.Config()
lastAcceptedBlock = bc.LastConsensusAcceptedBlock()
newDB = rawdb.NewMemoryDatabase()
)
acceptedState, err := bc.StateAt(lastAcceptedBlock.Root())
if err != nil {
t.Fatal(err)
}
if err := checkState(acceptedState); err != nil {
t.Fatalf("Check state failed for original blockchain due to: %s", err)
}
_ = genesis.MustCommit(newDB)
newBlockChain, err := create(newDB, chainConfig, common.Hash{})
if err != nil {
t.Fatalf("Failed to create new blockchain instance: %s", err)
}
for i := uint64(1); i <= lastAcceptedBlock.NumberU64(); i++ {
block := bc.GetBlockByNumber(i)
if block == nil {
t.Fatalf("Failed to retrieve block by number %d from original chain", i)
}
if err := newBlockChain.InsertBlock(block); err != nil {
t.Fatalf("Failed to insert block %s:%d due to %s", block.Hash().Hex(), block.NumberU64(), err)
}
if err := newBlockChain.Accept(block); err != nil {
t.Fatalf("Failed to accept block %s:%d due to %s", block.Hash().Hex(), block.NumberU64(), err)
}
}
newBlockChain.DrainAcceptorQueue()
newLastAcceptedBlock := newBlockChain.LastConsensusAcceptedBlock()
if newLastAcceptedBlock.Hash() != lastAcceptedBlock.Hash() {
t.Fatalf("Expected new blockchain to have last accepted block %s:%d, but found %s:%d", lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64(), newLastAcceptedBlock.Hash().Hex(), newLastAcceptedBlock.NumberU64())
}
// Check that the state of [newBlockChain] passes the check
acceptedState, err = newBlockChain.StateAt(lastAcceptedBlock.Root())
if err != nil {
t.Fatal(err)
}
if err := checkState(acceptedState); err != nil {
t.Fatalf("Check state failed for newly generated blockchain due to: %s", err)
}
// Copy the database over to prevent any issues when re-using [originalDB] after this call.
originalDB, err = copyMemDB(originalDB)
if err != nil {
t.Fatal(err)
}
restartedChain, err := create(originalDB, chainConfig, lastAcceptedBlock.Hash())
if err != nil {
t.Fatal(err)
}
defer restartedChain.Stop()
if currentBlock := restartedChain.CurrentBlock(); currentBlock.Hash() != lastAcceptedBlock.Hash() {
t.Fatalf("Expected restarted chain to have current block %s:%d, but found %s:%d", lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64(), currentBlock.Hash().Hex(), currentBlock.NumberU64())
}
if restartedLastAcceptedBlock := restartedChain.LastConsensusAcceptedBlock(); restartedLastAcceptedBlock.Hash() != lastAcceptedBlock.Hash() {
t.Fatalf("Expected restarted chain to have current block %s:%d, but found %s:%d", lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64(), restartedLastAcceptedBlock.Hash().Hex(), restartedLastAcceptedBlock.NumberU64())
}
// Check that the state of [restartedChain] passes the check
acceptedState, err = restartedChain.StateAt(lastAcceptedBlock.Root())
if err != nil {
t.Fatal(err)
}
if err := checkState(acceptedState); err != nil {
t.Fatalf("Check state failed for restarted blockchain due to: %s", err)
}
return bc, newBlockChain, restartedChain
}
func TestInsertChainAcceptSingleBlock(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{addr1: {Balance: genesisBalance}},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
// This call generates a chain of 3 blocks.
signer := types.HomesteadSigner{}
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, 3, 10, func(i int, gen *BlockGen) {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
// Insert three blocks into the chain and accept only the first block.
if _, err := blockchain.InsertChain(chain); err != nil {
t.Fatal(err)
}
if err := blockchain.Accept(chain[0]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
// check the state of the last accepted block
checkState := func(sdb *state.StateDB) error {
nonce := sdb.GetNonce(addr1)
if nonce != 1 {
return fmt.Errorf("expected nonce addr1: 1, found nonce: %d", nonce)
}
transferredFunds := big.NewInt(10000)
balance1 := sdb.GetBalance(addr1)
expectedBalance1 := new(big.Int).Sub(genesisBalance, transferredFunds)
if balance1.Cmp(expectedBalance1) != 0 {
return fmt.Errorf("expected addr1 balance: %d, found balance: %d", expectedBalance1, balance1)
}
balance2 := sdb.GetBalance(addr2)
expectedBalance2 := transferredFunds
if balance2.Cmp(expectedBalance2) != 0 {
return fmt.Errorf("expected addr2 balance: %d, found balance: %d", expectedBalance2, balance2)
}
nonce = sdb.GetNonce(addr2)
if nonce != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce: %d", nonce)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
func TestInsertLongForkedChain(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{addr1: {Balance: genesisBalance}},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
numBlocks := 129
signer := types.HomesteadSigner{}
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain1, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks, 10, func(i int, gen *BlockGen) {
// Generate a transaction to create a unique block
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
// Generate the forked chain to be longer than the original chain to check for a regression where
// a longer chain can trigger a reorg.
chain2, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks+1, 10, func(i int, gen *BlockGen) {
// Generate a transaction with a different amount to ensure [chain2] is different than [chain1].
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(5000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
if blockchain.snaps != nil {
if want, got := 1, blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
// Insert both chains.
if _, err := blockchain.InsertChain(chain1); err != nil {
t.Fatal(err)
}
if blockchain.snaps != nil {
if want, got := 1+len(chain1), blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
if _, err := blockchain.InsertChain(chain2); err != nil {
t.Fatal(err)
}
if blockchain.snaps != nil {
if want, got := 1+len(chain1)+len(chain2), blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
currentBlock := blockchain.CurrentBlock()
expectedCurrentBlock := chain1[len(chain1)-1]
if currentBlock.Hash() != expectedCurrentBlock.Hash() {
t.Fatalf("Expected current block to be %s:%d, but found %s%d", expectedCurrentBlock.Hash().Hex(), expectedCurrentBlock.NumberU64(), currentBlock.Hash().Hex(), currentBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// Accept the first block in [chain1], reject all blocks in [chain2] to
// mimic the order that the consensus engine will call Accept/Reject in
// and then Accept the rest of the blocks in [chain1].
if err := blockchain.Accept(chain1[0]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
if blockchain.snaps != nil {
// Snap layer count should be 1 fewer
if want, got := len(chain1)+len(chain2), blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
for i := 0; i < len(chain2); i++ {
if err := blockchain.Reject(chain2[i]); err != nil {
t.Fatal(err)
}
if blockchain.snaps != nil {
// Snap layer count should decrease by 1 per Reject
if want, got := len(chain1)+len(chain2)-i-1, blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
}
if blockchain.snaps != nil {
if want, got := len(chain1), blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
for i := 1; i < len(chain1); i++ {
if err := blockchain.Accept(chain1[i]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
if blockchain.snaps != nil {
// Snap layer count should decrease by 1 per Accept
if want, got := len(chain1)-i, blockchain.snaps.NumBlockLayers(); got != want {
t.Fatalf("incorrect snapshot layer count; got %d, want %d", got, want)
}
}
}
lastAcceptedBlock := blockchain.LastConsensusAcceptedBlock()
expectedLastAcceptedBlock := chain1[len(chain1)-1]
if lastAcceptedBlock.Hash() != expectedLastAcceptedBlock.Hash() {
t.Fatalf("Expected last accepted block to be %s:%d, but found %s%d", expectedLastAcceptedBlock.Hash().Hex(), expectedLastAcceptedBlock.NumberU64(), lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// check the state of the last accepted block
checkState := func(sdb *state.StateDB) error {
nonce1 := sdb.GetNonce(addr1)
if nonce1 != 129 {
return fmt.Errorf("expected addr1 nonce: 129, found nonce %d", nonce1)
}
balance1 := sdb.GetBalance(addr1)
transferredFunds := new(big.Int).Mul(big.NewInt(129), big.NewInt(10000))
expectedBalance := new(big.Int).Sub(genesisBalance, transferredFunds)
if balance1.Cmp(expectedBalance) != 0 {
return fmt.Errorf("expected addr1 balance: %d, found balance: %d", expectedBalance, balance1)
}
nonce2 := sdb.GetNonce(addr2)
if nonce2 != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce: %d", nonce2)
}
balance2 := sdb.GetBalance(addr2)
if balance2.Cmp(transferredFunds) != 0 {
return fmt.Errorf("expected addr2 balance: %d, found balance: %d", transferredFunds, balance2)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
func TestAcceptNonCanonicalBlock(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{addr1: {Balance: genesisBalance}},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
numBlocks := 3
signer := types.HomesteadSigner{}
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain1, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks, 10, func(i int, gen *BlockGen) {
// Generate a transaction to create a unique block
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
chain2, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks, 10, func(i int, gen *BlockGen) {
// Generate a transaction with a different amount to create a chain of blocks different from [chain1]
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(5000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
// Insert three blocks into the chain and accept only the first.
if _, err := blockchain.InsertChain(chain1); err != nil {
t.Fatal(err)
}
if _, err := blockchain.InsertChain(chain2); err != nil {
t.Fatal(err)
}
currentBlock := blockchain.CurrentBlock()
expectedCurrentBlock := chain1[len(chain1)-1]
if currentBlock.Hash() != expectedCurrentBlock.Hash() {
t.Fatalf("Expected current block to be %s:%d, but found %s%d", expectedCurrentBlock.Hash().Hex(), expectedCurrentBlock.NumberU64(), currentBlock.Hash().Hex(), currentBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// Accept the first block in [chain2], reject all blocks in [chain1] to
// mimic the order that the consensus engine will call Accept/Reject in.
if err := blockchain.Accept(chain2[0]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
for i := 0; i < len(chain1); i++ {
if err := blockchain.Reject(chain1[i]); err != nil {
t.Fatal(err)
}
}
lastAcceptedBlock := blockchain.LastConsensusAcceptedBlock()
expectedLastAcceptedBlock := chain2[0]
if lastAcceptedBlock.Hash() != expectedLastAcceptedBlock.Hash() {
t.Fatalf("Expected last accepted block to be %s:%d, but found %s%d", expectedLastAcceptedBlock.Hash().Hex(), expectedLastAcceptedBlock.NumberU64(), lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// check the state of the last accepted block
checkState := func(sdb *state.StateDB) error {
nonce1 := sdb.GetNonce(addr1)
if nonce1 != 1 {
return fmt.Errorf("expected addr1 nonce: 1, found nonce: %d", nonce1)
}
balance1 := sdb.GetBalance(addr1)
transferredFunds := big.NewInt(5000)
expectedBalance := new(big.Int).Sub(genesisBalance, transferredFunds)
if balance1.Cmp(expectedBalance) != 0 {
return fmt.Errorf("expected balance1: %d, found balance: %d", expectedBalance, balance1)
}
nonce2 := sdb.GetNonce(addr2)
if nonce2 != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce %d", nonce2)
}
balance2 := sdb.GetBalance(addr2)
if balance2.Cmp(transferredFunds) != 0 {
return fmt.Errorf("expected balance2: %d, found %d", transferredFunds, balance2)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
func TestSetPreferenceRewind(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{addr1: {Balance: genesisBalance}},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
numBlocks := 3
signer := types.HomesteadSigner{}
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks, 10, func(i int, gen *BlockGen) {
// Generate a transaction to create a unique block
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
// Insert three blocks into the chain and accept only the first.
if _, err := blockchain.InsertChain(chain); err != nil {
t.Fatal(err)
}
currentBlock := blockchain.CurrentBlock()
expectedCurrentBlock := chain[len(chain)-1]
if currentBlock.Hash() != expectedCurrentBlock.Hash() {
t.Fatalf("Expected current block to be %s:%d, but found %s%d", expectedCurrentBlock.Hash().Hex(), expectedCurrentBlock.NumberU64(), currentBlock.Hash().Hex(), currentBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// SetPreference to an ancestor of the currently preferred block. Test that this unlikely, but possible behavior
// is handled correctly.
if err := blockchain.SetPreference(chain[0]); err != nil {
t.Fatal(err)
}
currentBlock = blockchain.CurrentBlock()
expectedCurrentBlock = chain[0]
if currentBlock.Hash() != expectedCurrentBlock.Hash() {
t.Fatalf("Expected current block to be %s:%d, but found %s%d", expectedCurrentBlock.Hash().Hex(), expectedCurrentBlock.NumberU64(), currentBlock.Hash().Hex(), currentBlock.NumberU64())
}
lastAcceptedBlock := blockchain.LastConsensusAcceptedBlock()
expectedLastAcceptedBlock := blockchain.Genesis()
if lastAcceptedBlock.Hash() != expectedLastAcceptedBlock.Hash() {
t.Fatalf("Expected last accepted block to be %s:%d, but found %s%d", expectedLastAcceptedBlock.Hash().Hex(), expectedLastAcceptedBlock.NumberU64(), lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
// check the state of the last accepted block
checkGenesisState := func(sdb *state.StateDB) error {
nonce1 := sdb.GetNonce(addr1)
if nonce1 != 0 {
return fmt.Errorf("expected addr1 nonce: 0, found nonce: %d", nonce1)
}
balance1 := sdb.GetBalance(addr1)
if balance1.Cmp(genesisBalance) != 0 {
return fmt.Errorf("expected addr1 balance: %d, found balance: %d", genesisBalance, balance1)
}
nonce2 := sdb.GetNonce(addr2)
if nonce2 != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce: %d", nonce2)
}
balance2 := sdb.GetBalance(addr2)
if balance2.Cmp(big.NewInt(0)) != 0 {
return fmt.Errorf("expected addr2 balance: 0, found balance %d", balance2)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkGenesisState)
if err := blockchain.Accept(chain[0]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
lastAcceptedBlock = blockchain.LastConsensusAcceptedBlock()
expectedLastAcceptedBlock = chain[0]
if lastAcceptedBlock.Hash() != expectedLastAcceptedBlock.Hash() {
t.Fatalf("Expected last accepted block to be %s:%d, but found %s%d", expectedLastAcceptedBlock.Hash().Hex(), expectedLastAcceptedBlock.NumberU64(), lastAcceptedBlock.Hash().Hex(), lastAcceptedBlock.NumberU64())
}
if err := blockchain.ValidateCanonicalChain(); err != nil {
t.Fatal(err)
}
checkUpdatedState := func(sdb *state.StateDB) error {
nonce := sdb.GetNonce(addr1)
if nonce != 1 {
return fmt.Errorf("expected addr1 nonce: 1, found nonce: %d", nonce)
}
transferredFunds := big.NewInt(10000)
balance1 := sdb.GetBalance(addr1)
expectedBalance1 := new(big.Int).Sub(genesisBalance, transferredFunds)
if balance1.Cmp(expectedBalance1) != 0 {
return fmt.Errorf("expected addr1 balance: %d, found balance %d", expectedBalance1, balance1)
}
balance2 := sdb.GetBalance(addr2)
expectedBalance2 := transferredFunds
if balance2.Cmp(expectedBalance2) != 0 {
return fmt.Errorf("expected addr2 balance: %d, found balance: %d", expectedBalance2, balance2)
}
nonce = sdb.GetNonce(addr2)
if nonce != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce: %d", nonce)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkUpdatedState)
}
func TestBuildOnVariousStages(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
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)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{
addr1: {Balance: genesisBalance},
addr3: {Balance: genesisBalance},
},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
// This call generates a chain of 3 blocks.
signer := types.HomesteadSigner{}
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain1, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, 20, 10, func(i int, gen *BlockGen) {
// Send all funds back and forth between the two accounts
if i%2 == 0 {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, genesisBalance, params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
} else {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr1, genesisBalance, params.TxGas, nil, nil), signer, key2)
gen.AddTx(tx)
}
})
if err != nil {
t.Fatal(err)
}
// Build second chain forked off of the 10th block in [chain1]
chain2, _, err := GenerateChain(gspec.Config, chain1[9], blockchain.engine, genDB, 10, 10, func(i int, gen *BlockGen) {
// Send all funds back and forth between the two accounts
if i%2 == 0 {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr3), addr2, genesisBalance, params.TxGas, nil, nil), signer, key3)
gen.AddTx(tx)
} else {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, genesisBalance, params.TxGas, nil, nil), signer, key2)
gen.AddTx(tx)
}
})
if err != nil {
t.Fatal(err)
}
// Build third chain forked off of the 5th block in [chain1].
// The parent of this chain will be accepted before this fork
// is inserted.
chain3, _, err := GenerateChain(gspec.Config, chain1[4], blockchain.engine, genDB, 10, 10, func(i int, gen *BlockGen) {
// Send all funds back and forth between accounts 2 and 3.
if i%2 == 0 {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, genesisBalance, params.TxGas, nil, nil), signer, key2)
gen.AddTx(tx)
} else {
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr3), addr2, genesisBalance, params.TxGas, nil, nil), signer, key3)
gen.AddTx(tx)
}
})
if err != nil {
t.Fatal(err)
}
// Insert first 10 blocks from [chain1]
if _, err := blockchain.InsertChain(chain1); err != nil {
t.Fatal(err)
}
// Accept the first 5 blocks
for _, block := range chain1[0:5] {
if err := blockchain.Accept(block); err != nil {
t.Fatal(err)
}
}
blockchain.DrainAcceptorQueue()
// Insert the forked chain [chain2] which starts at the 10th
// block in [chain1] ie. a block that is still in processing.
if _, err := blockchain.InsertChain(chain2); err != nil {
t.Fatal(err)
}
// Insert another forked chain starting at the last accepted
// block from [chain1].
if _, err := blockchain.InsertChain(chain3); err != nil {
t.Fatal(err)
}
// Accept the next block in [chain1] and then reject all
// of the blocks in [chain3], which would then be rejected.
if err := blockchain.Accept(chain1[5]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
for _, block := range chain3 {
if err := blockchain.Reject(block); err != nil {
t.Fatal(err)
}
}
// Accept the rest of the blocks in [chain1]
for _, block := range chain1[6:10] {
if err := blockchain.Accept(block); err != nil {
t.Fatal(err)
}
}
blockchain.DrainAcceptorQueue()
// Accept the first block in [chain2] and reject the
// subsequent blocks in [chain1] which would then be rejected.
if err := blockchain.Accept(chain2[0]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
for _, block := range chain1[10:] {
if err := blockchain.Reject(block); err != nil {
t.Fatal(err)
}
}
// check the state of the last accepted block
checkState := func(sdb *state.StateDB) error {
nonce := sdb.GetNonce(addr1)
if nonce != 5 {
return fmt.Errorf("expected nonce addr1: 5, found nonce: %d", nonce)
}
balance1 := sdb.GetBalance(addr1)
expectedBalance1 := genesisBalance
if balance1.Cmp(expectedBalance1) != 0 {
return fmt.Errorf("expected addr1 balance: %d, found balance: %d", expectedBalance1, balance1)
}
balance2 := sdb.GetBalance(addr2)
expectedBalance2 := genesisBalance
if balance2.Cmp(expectedBalance2) != 0 {
return fmt.Errorf("expected addr2 balance: %d, found balance: %d", expectedBalance2, balance2)
}
nonce = sdb.GetNonce(addr2)
if nonce != 5 {
return fmt.Errorf("expected addr2 nonce: 5, found nonce: %d", nonce)
}
balance3 := sdb.GetBalance(addr3)
expectedBalance3 := common.Big0
if balance3.Cmp(expectedBalance3) != 0 {
return fmt.Errorf("expected addr3 balance: %d, found balance: %d", expectedBalance3, balance3)
}
nonce = sdb.GetNonce(addr3)
if nonce != 1 {
return fmt.Errorf("expected addr3 nonce: 1, found nonce: %d", nonce)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
func TestEmptyBlocks(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
// Generate chain of blocks using [genDB] instead of [chainDB] to avoid writing
// to the BlockChain's database while generating blocks.
chain, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, 3, 10, func(i int, gen *BlockGen) {})
if err != nil {
t.Fatal(err)
}
// Insert three blocks into the chain and accept only the first block.
if _, err := blockchain.InsertChain(chain); err != nil {
t.Fatal(err)
}
for _, block := range chain {
if err := blockchain.Accept(block); err != nil {
t.Fatal(err)
}
}
blockchain.DrainAcceptorQueue()
// Nothing to assert about the state
checkState := func(sdb *state.StateDB) error {
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
func TestReorgReInsert(t *testing.T, create func(db ethdb.Database, chainConfig *params.ChainConfig, lastAcceptedHash common.Hash) (*BlockChain, error)) {
var (
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = crypto.PubkeyToAddress(key2.PublicKey)
// We use two separate databases since GenerateChain commits the state roots to its underlying
// database.
genDB = rawdb.NewMemoryDatabase()
chainDB = rawdb.NewMemoryDatabase()
)
// Ensure that key1 has some funds in the genesis block.
genesisBalance := big.NewInt(1000000000)
gspec := &Genesis{
Config: ¶ms.ChainConfig{HomesteadBlock: new(big.Int)},
Alloc: GenesisAlloc{addr1: {Balance: genesisBalance}},
}
genesis := gspec.MustCommit(genDB)
_ = gspec.MustCommit(chainDB)
blockchain, err := create(chainDB, gspec.Config, common.Hash{})
if err != nil {
t.Fatal(err)
}
defer blockchain.Stop()
signer := types.HomesteadSigner{}
numBlocks := 3
chain, _, err := GenerateChain(gspec.Config, genesis, blockchain.engine, genDB, numBlocks, 10, func(i int, gen *BlockGen) {
// Generate a transaction to create a unique block
tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
gen.AddTx(tx)
})
if err != nil {
t.Fatal(err)
}
// Insert and accept first block
if err := blockchain.InsertBlock(chain[0]); err != nil {
t.Fatal(err)
}
if err := blockchain.Accept(chain[0]); err != nil {
t.Fatal(err)
}
// Insert block and then set preference back (rewind) to last accepted blck
if err := blockchain.InsertBlock(chain[1]); err != nil {
t.Fatal(err)
}
if err := blockchain.SetPreference(chain[0]); err != nil {
t.Fatal(err)
}
// Re-insert and accept block
if err := blockchain.InsertBlock(chain[1]); err != nil {
t.Fatal(err)
}
if err := blockchain.Accept(chain[1]); err != nil {
t.Fatal(err)
}
// Build on top of the re-inserted block and accept
if err := blockchain.InsertBlock(chain[2]); err != nil {
t.Fatal(err)
}
if err := blockchain.Accept(chain[2]); err != nil {
t.Fatal(err)
}
blockchain.DrainAcceptorQueue()
// Nothing to assert about the state
checkState := func(sdb *state.StateDB) error {
nonce1 := sdb.GetNonce(addr1)
if nonce1 != 3 {
return fmt.Errorf("expected addr1 nonce: 3, found nonce: %d", nonce1)
}
balance1 := sdb.GetBalance(addr1)
transferredFunds := big.NewInt(30000)
expectedBalance := new(big.Int).Sub(genesisBalance, transferredFunds)
if balance1.Cmp(expectedBalance) != 0 {
return fmt.Errorf("expected balance1: %d, found balance: %d", expectedBalance, balance1)
}
nonce2 := sdb.GetNonce(addr2)
if nonce2 != 0 {
return fmt.Errorf("expected addr2 nonce: 0, found nonce %d", nonce2)
}
balance2 := sdb.GetBalance(addr2)
if balance2.Cmp(transferredFunds) != 0 {
return fmt.Errorf("expected balance2: %d, found %d", transferredFunds, balance2)
}
return nil
}
checkBlockChainState(t, blockchain, gspec, chainDB, create, checkState)
}
// Insert two different chains that result in the identical state root.
// Once we accept one of the chains, we insert and accept A3 on top of the shared
// state root
// G (genesis)