accounts/a/b/backends, core: chain maker homestead block set to 0

The chain maker and the simulated backend now run with a homestead phase
beginning at block 0 (i.e. there's no frontier).

This commit also fixes up #2388

accounts/abi/bind/backends/simulated.go

@@ -27,11 +27,10 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/params"
 )
 
 // Default chain configuration which sets homestead phase at block 0 (i.e. no frontier)
-var chainConfig = &core.ChainConfig{HomesteadBlock: params.MainNetHomesteadBlock}
+var chainConfig = &core.ChainConfig{HomesteadBlock: big.NewInt(0)}
 
 // This nil assignment ensures compile time that SimulatedBackend implements bind.ContractBackend.
 var _ bind.ContractBackend = (*SimulatedBackend)(nil)

core/block_validator_test.go

@@ -27,12 +27,11 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/pow/ezp"
 )
 
 func testChainConfig() *ChainConfig {
-	return &ChainConfig{HomesteadBlock: params.MainNetHomesteadBlock}
+	return &ChainConfig{HomesteadBlock: big.NewInt(0)}
 }
 
 func proc() (Validator, *BlockChain) {

core/blockchain_test.go

@@ -1025,23 +1025,21 @@ func TestReorgSideEvent(t *testing.T) {
 	evmux := &event.TypeMux{}
 	blockchain, _ := NewBlockChain(db, testChainConfig(), FakePow{}, evmux)
 
-	chain, _ := GenerateChain(genesis, db, 3, func(i int, gen *BlockGen) {
-		if i == 2 {
-			gen.OffsetTime(9)
-		}
-	})
+	chain, _ := GenerateChain(genesis, db, 3, func(i int, gen *BlockGen) {})
 	if _, err := blockchain.InsertChain(chain); err != nil {
 		t.Fatalf("failed to insert chain: %v", err)
 	}
 
 	replacementBlocks, _ := GenerateChain(genesis, db, 4, func(i int, gen *BlockGen) {
 		tx, err := types.NewContractCreation(gen.TxNonce(addr1), new(big.Int), big.NewInt(1000000), new(big.Int), nil).SignECDSA(key1)
+		if i == 2 {
+			gen.OffsetTime(-1)
+		}
 		if err != nil {
 			t.Fatalf("failed to create tx: %v", err)
 		}
 		gen.AddTx(tx)
 	})
-
 	subs := evmux.Subscribe(ChainSideEvent{})
 	if _, err := blockchain.InsertChain(replacementBlocks); err != nil {
 		t.Fatalf("failed to insert chain: %v", err)

core/chain_makers.go

@@ -26,7 +26,6 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/pow"
 )
 
@@ -35,16 +34,8 @@ import (
  */
 
 // MakeChainConfig returns a new ChainConfig with the ethereum default chain settings.
-func MakeChainConfig(testnet bool) *ChainConfig {
-	homesteadBlock := params.MainNetHomesteadBlock
-	// set a different default homestead block for the testnet
-	if testnet {
-		homesteadBlock = params.TestNetHomesteadBlock
-	}
-
-	return &ChainConfig{
-		HomesteadBlock: homesteadBlock,
-	}
+func MakeChainConfig() *ChainConfig {
+	return &ChainConfig{HomesteadBlock: big.NewInt(0)}
 }
 
 // FakePow is a non-validating proof of work implementation.
@@ -110,7 +101,7 @@ func (b *BlockGen) AddTx(tx *types.Transaction) {
 		b.SetCoinbase(common.Address{})
 	}
 	b.statedb.StartRecord(tx.Hash(), common.Hash{}, len(b.txs))
-	receipt, _, _, err := ApplyTransaction(MakeChainConfig(true), nil, b.gasPool, b.statedb, b.header, tx, b.header.GasUsed, vm.Config{})
+	receipt, _, _, err := ApplyTransaction(MakeChainConfig(), nil, b.gasPool, b.statedb, b.header, tx, b.header.GasUsed, vm.Config{})
 	if err != nil {
 		panic(err)
 	}
@@ -167,7 +158,7 @@ func (b *BlockGen) OffsetTime(seconds int64) {
 	if b.header.Time.Cmp(b.parent.Header().Time) <= 0 {
 		panic("block time out of range")
 	}
-	b.header.Difficulty = CalcDifficulty(MakeChainConfig(true), b.header.Time.Uint64(), b.parent.Time().Uint64(), b.parent.Number(), b.parent.Difficulty())
+	b.header.Difficulty = CalcDifficulty(MakeChainConfig(), b.header.Time.Uint64(), b.parent.Time().Uint64(), b.parent.Number(), b.parent.Difficulty())
 }
 
 // GenerateChain creates a chain of n blocks. The first block's
@@ -222,7 +213,7 @@ func makeHeader(parent *types.Block, state *state.StateDB) *types.Header {
 		Root:       state.IntermediateRoot(),
 		ParentHash: parent.Hash(),
 		Coinbase:   parent.Coinbase(),
-		Difficulty: CalcDifficulty(MakeChainConfig(true), time.Uint64(), new(big.Int).Sub(time, big.NewInt(10)).Uint64(), parent.Number(), parent.Difficulty()),
+		Difficulty: CalcDifficulty(MakeChainConfig(), time.Uint64(), new(big.Int).Sub(time, big.NewInt(10)).Uint64(), parent.Number(), parent.Difficulty()),
 		GasLimit:   CalcGasLimit(parent),
 		GasUsed:    new(big.Int),
 		Number:     new(big.Int).Add(parent.Number(), common.Big1),
@@ -241,7 +232,7 @@ func newCanonical(n int, full bool) (ethdb.Database, *BlockChain, error) {
 	// Initialize a fresh chain with only a genesis block
 	genesis, _ := WriteTestNetGenesisBlock(db)
 
-	blockchain, _ := NewBlockChain(db, MakeChainConfig(false), FakePow{}, evmux)
+	blockchain, _ := NewBlockChain(db, MakeChainConfig(), FakePow{}, evmux)
 	// Create and inject the requested chain
 	if n == 0 {
 		return db, blockchain, nil

core/chain_makers_test.go

@@ -77,7 +77,7 @@ func ExampleGenerateChain() {
 
 	// Import the chain. This runs all block validation rules.
 	evmux := &event.TypeMux{}
-	blockchain, _ := NewBlockChain(db, MakeChainConfig(true), FakePow{}, evmux)
+	blockchain, _ := NewBlockChain(db, MakeChainConfig(), FakePow{}, evmux)
 	if i, err := blockchain.InsertChain(chain); err != nil {
 		fmt.Printf("insert error (block %d): %v\n", i, err)
 		return

eth/helper_test.go

@@ -17,7 +17,6 @@ import (
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/params"
 )
 
 var (
@@ -35,7 +34,7 @@ func newTestProtocolManager(fastSync bool, blocks int, generator func(int, *core
 		pow           = new(core.FakePow)
 		db, _         = ethdb.NewMemDatabase()
 		genesis       = core.WriteGenesisBlockForTesting(db, core.GenesisAccount{testBankAddress, testBankFunds})
-		chainConfig   = &core.ChainConfig{HomesteadBlock: params.MainNetHomesteadBlock}
+		chainConfig   = &core.ChainConfig{HomesteadBlock: big.NewInt(0)} // homestead set to 0 because of chain maker
 		blockchain, _ = core.NewBlockChain(db, chainConfig, pow, evmux)
 	)
 	chain, _ := core.GenerateChain(genesis, db, blocks, generator)