params: fix golint warnings (#16853)

params: fix golint warnings

22 files changed, 72 insertions, 61 deletions

diff --git a/cmd/faucet/faucet.go b/cmd/faucet/faucet.go
index 5bad09bbd..5f00dde74 100644
--- a/cmd/faucet/faucet.go
+++ b/cmd/faucet/faucet.go
@@ -474,7 +474,7 @@ func (f *faucet) apiHandler(conn *websocket.Conn) {
 			amount = new(big.Int).Div(amount, new(big.Int).Exp(big.NewInt(2), big.NewInt(int64(msg.Tier)), nil))
 
 			tx := types.NewTransaction(f.nonce+uint64(len(f.reqs)), address, amount, 21000, f.price, nil)
-			signed, err := f.keystore.SignTx(f.account, tx, f.config.ChainId)
+			signed, err := f.keystore.SignTx(f.account, tx, f.config.ChainID)
 			if err != nil {
 				f.lock.Unlock()
 				if err = sendError(conn, err); err != nil {
diff --git a/cmd/puppeth/genesis.go b/cmd/puppeth/genesis.go
index 1974a94aa..5f39a889d 100644
--- a/cmd/puppeth/genesis.go
+++ b/cmd/puppeth/genesis.go
@@ -103,8 +103,8 @@ func newCppEthereumGenesisSpec(network string, genesis *core.Genesis) (*cppEther
 	spec.Params.ByzantiumForkBlock = (hexutil.Uint64)(genesis.Config.ByzantiumBlock.Uint64())
 	spec.Params.ConstantinopleForkBlock = (hexutil.Uint64)(math.MaxUint64)
 
-	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainId.Uint64())
-	spec.Params.ChainID = (hexutil.Uint64)(genesis.Config.ChainId.Uint64())
+	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainID.Uint64())
+	spec.Params.ChainID = (hexutil.Uint64)(genesis.Config.ChainID.Uint64())
 
 	spec.Params.MaximumExtraDataSize = (hexutil.Uint64)(params.MaximumExtraDataSize)
 	spec.Params.MinGasLimit = (hexutil.Uint64)(params.MinGasLimit)
@@ -284,7 +284,7 @@ func newParityChainSpec(network string, genesis *core.Genesis, bootnodes []strin
 	spec.Params.MaximumExtraDataSize = (hexutil.Uint64)(params.MaximumExtraDataSize)
 	spec.Params.MinGasLimit = (hexutil.Uint64)(params.MinGasLimit)
 	spec.Params.GasLimitBoundDivisor = (hexutil.Uint64)(params.GasLimitBoundDivisor)
-	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainId.Uint64())
+	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainID.Uint64())
 	spec.Params.MaxCodeSize = params.MaxCodeSize
 	spec.Params.EIP155Transition = genesis.Config.EIP155Block.Uint64()
 	spec.Params.EIP98Transition = math.MaxUint64
diff --git a/cmd/puppeth/module_dashboard.go b/cmd/puppeth/module_dashboard.go
index 4f9e88899..a51762338 100644
--- a/cmd/puppeth/module_dashboard.go
+++ b/cmd/puppeth/module_dashboard.go
@@ -609,7 +609,7 @@ func deployDashboard(client *sshClient, network string, conf *config, config *da
 	}
 	template.Must(template.New("").Parse(dashboardContent)).Execute(indexfile, map[string]interface{}{
 		"Network":          network,
-		"NetworkID":        conf.Genesis.Config.ChainId,
+		"NetworkID":        conf.Genesis.Config.ChainID,
 		"NetworkTitle":     strings.Title(network),
 		"EthstatsPage":     config.ethstats,
 		"ExplorerPage":     config.explorer,
diff --git a/cmd/puppeth/wizard_faucet.go b/cmd/puppeth/wizard_faucet.go
index 9a429bc96..6f0840894 100644
--- a/cmd/puppeth/wizard_faucet.go
+++ b/cmd/puppeth/wizard_faucet.go
@@ -49,7 +49,7 @@ func (w *wizard) deployFaucet() {
 	existed := err == nil
 
 	infos.node.genesis, _ = json.MarshalIndent(w.conf.Genesis, "", "  ")
-	infos.node.network = w.conf.Genesis.Config.ChainId.Int64()
+	infos.node.network = w.conf.Genesis.Config.ChainID.Int64()
 
 	// Figure out which port to listen on
 	fmt.Println()
diff --git a/cmd/puppeth/wizard_genesis.go b/cmd/puppeth/wizard_genesis.go
index f255ef6e6..6c4cd571f 100644
--- a/cmd/puppeth/wizard_genesis.go
+++ b/cmd/puppeth/wizard_genesis.go
@@ -121,7 +121,7 @@ func (w *wizard) makeGenesis() {
 	// Query the user for some custom extras
 	fmt.Println()
 	fmt.Println("Specify your chain/network ID if you want an explicit one (default = random)")
-	genesis.Config.ChainId = new(big.Int).SetUint64(uint64(w.readDefaultInt(rand.Intn(65536))))
+	genesis.Config.ChainID = new(big.Int).SetUint64(uint64(w.readDefaultInt(rand.Intn(65536))))
 
 	// All done, store the genesis and flush to disk
 	log.Info("Configured new genesis block")
diff --git a/cmd/puppeth/wizard_node.go b/cmd/puppeth/wizard_node.go
index a60948bc6..f3fef4034 100644
--- a/cmd/puppeth/wizard_node.go
+++ b/cmd/puppeth/wizard_node.go
@@ -56,7 +56,7 @@ func (w *wizard) deployNode(boot bool) {
 	existed := err == nil
 
 	infos.genesis, _ = json.MarshalIndent(w.conf.Genesis, "", "  ")
-	infos.network = w.conf.Genesis.Config.ChainId.Int64()
+	infos.network = w.conf.Genesis.Config.ChainID.Int64()
 
 	// Figure out where the user wants to store the persistent data
 	fmt.Println()
diff --git a/cmd/puppeth/wizard_wallet.go b/cmd/puppeth/wizard_wallet.go
index 933cd9ae5..7624d11e2 100644
--- a/cmd/puppeth/wizard_wallet.go
+++ b/cmd/puppeth/wizard_wallet.go
@@ -52,7 +52,7 @@ func (w *wizard) deployWallet() {
 	existed := err == nil
 
 	infos.genesis, _ = json.MarshalIndent(w.conf.Genesis, "", "  ")
-	infos.network = w.conf.Genesis.Config.ChainId.Int64()
+	infos.network = w.conf.Genesis.Config.ChainID.Int64()
 
 	// Figure out which port to listen on
 	fmt.Println()
diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index 89c071174..5dbf63d1d 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -578,7 +578,7 @@ func TestFastVsFullChains(t *testing.T) {
 			Alloc:  GenesisAlloc{address: {Balance: funds}},
 		}
 		genesis = gspec.MustCommit(gendb)
-		signer  = types.NewEIP155Signer(gspec.Config.ChainId)
+		signer  = types.NewEIP155Signer(gspec.Config.ChainID)
 	)
 	blocks, receipts := GenerateChain(gspec.Config, genesis, ethash.NewFaker(), gendb, 1024, func(i int, block *BlockGen) {
 		block.SetCoinbase(common.Address{0x00})
@@ -753,7 +753,7 @@ func TestChainTxReorgs(t *testing.T) {
 			},
 		}
 		genesis = gspec.MustCommit(db)
-		signer  = types.NewEIP155Signer(gspec.Config.ChainId)
+		signer  = types.NewEIP155Signer(gspec.Config.ChainID)
 	)
 
 	// Create two transactions shared between the chains:
@@ -859,7 +859,7 @@ func TestLogReorgs(t *testing.T) {
 		code    = common.Hex2Bytes("60606040525b7f24ec1d3ff24c2f6ff210738839dbc339cd45a5294d85c79361016243157aae7b60405180905060405180910390a15b600a8060416000396000f360606040526008565b00")
 		gspec   = &Genesis{Config: params.TestChainConfig, Alloc: GenesisAlloc{addr1: {Balance: big.NewInt(10000000000000)}}}
 		genesis = gspec.MustCommit(db)
-		signer  = types.NewEIP155Signer(gspec.Config.ChainId)
+		signer  = types.NewEIP155Signer(gspec.Config.ChainID)
 	)
 
 	blockchain, _ := NewBlockChain(db, nil, gspec.Config, ethash.NewFaker(), vm.Config{})
@@ -906,7 +906,7 @@ func TestReorgSideEvent(t *testing.T) {
 			Alloc:  GenesisAlloc{addr1: {Balance: big.NewInt(10000000000000)}},
 		}
 		genesis = gspec.MustCommit(db)
-		signer  = types.NewEIP155Signer(gspec.Config.ChainId)
+		signer  = types.NewEIP155Signer(gspec.Config.ChainID)
 	)
 
 	blockchain, _ := NewBlockChain(db, nil, gspec.Config, ethash.NewFaker(), vm.Config{})
@@ -1032,7 +1032,7 @@ func TestEIP155Transition(t *testing.T) {
 		funds      = big.NewInt(1000000000)
 		deleteAddr = common.Address{1}
 		gspec      = &Genesis{
-			Config: &params.ChainConfig{ChainId: big.NewInt(1), EIP155Block: big.NewInt(2), HomesteadBlock: new(big.Int)},
+			Config: &params.ChainConfig{ChainID: big.NewInt(1), EIP155Block: big.NewInt(2), HomesteadBlock: new(big.Int)},
 			Alloc:  GenesisAlloc{address: {Balance: funds}, deleteAddr: {Balance: new(big.Int)}},
 		}
 		genesis = gspec.MustCommit(db)
@@ -1063,7 +1063,7 @@ func TestEIP155Transition(t *testing.T) {
 			}
 			block.AddTx(tx)
 
-			tx, err = basicTx(types.NewEIP155Signer(gspec.Config.ChainId))
+			tx, err = basicTx(types.NewEIP155Signer(gspec.Config.ChainID))
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -1075,7 +1075,7 @@ func TestEIP155Transition(t *testing.T) {
 			}
 			block.AddTx(tx)
 
-			tx, err = basicTx(types.NewEIP155Signer(gspec.Config.ChainId))
+			tx, err = basicTx(types.NewEIP155Signer(gspec.Config.ChainID))
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -1103,7 +1103,7 @@ func TestEIP155Transition(t *testing.T) {
 	}
 
 	// generate an invalid chain id transaction
-	config := &params.ChainConfig{ChainId: big.NewInt(2), EIP155Block: big.NewInt(2), HomesteadBlock: new(big.Int)}
+	config := &params.ChainConfig{ChainID: big.NewInt(2), EIP155Block: big.NewInt(2), HomesteadBlock: new(big.Int)}
 	blocks, _ = GenerateChain(config, blocks[len(blocks)-1], ethash.NewFaker(), db, 4, func(i int, block *BlockGen) {
 		var (
 			tx      *types.Transaction
@@ -1137,7 +1137,7 @@ func TestEIP161AccountRemoval(t *testing.T) {
 		theAddr = common.Address{1}
 		gspec   = &Genesis{
 			Config: &params.ChainConfig{
-				ChainId:        big.NewInt(1),
+				ChainID:        big.NewInt(1),
 				HomesteadBlock: new(big.Int),
 				EIP155Block:    new(big.Int),
 				EIP158Block:    big.NewInt(2),
@@ -1153,7 +1153,7 @@ func TestEIP161AccountRemoval(t *testing.T) {
 		var (
 			tx     *types.Transaction
 			err    error
-			signer = types.NewEIP155Signer(gspec.Config.ChainId)
+			signer = types.NewEIP155Signer(gspec.Config.ChainID)
 		)
 		switch i {
 		case 0:
diff --git a/core/tx_pool.go b/core/tx_pool.go
index 7393c8286..c1dd7ac73 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -222,7 +222,7 @@ func NewTxPool(config TxPoolConfig, chainconfig *params.ChainConfig, chain block
 		config:      config,
 		chainconfig: chainconfig,
 		chain:       chain,
-		signer:      types.NewEIP155Signer(chainconfig.ChainId),
+		signer:      types.NewEIP155Signer(chainconfig.ChainID),
 		pending:     make(map[common.Address]*txList),
 		queue:       make(map[common.Address]*txList),
 		beats:       make(map[common.Address]time.Time),
diff --git a/core/types/transaction_signing.go b/core/types/transaction_signing.go
index dfc84fdac..c195d23a3 100644
--- a/core/types/transaction_signing.go
+++ b/core/types/transaction_signing.go
@@ -43,7 +43,7 @@ func MakeSigner(config *params.ChainConfig, blockNumber *big.Int) Signer {
 	var signer Signer
 	switch {
 	case config.IsEIP155(blockNumber):
-		signer = NewEIP155Signer(config.ChainId)
+		signer = NewEIP155Signer(config.ChainID)
 	case config.IsHomestead(blockNumber):
 		signer = HomesteadSigner{}
 	default:
diff --git a/core/vm/runtime/runtime.go b/core/vm/runtime/runtime.go
index c8c5d34d9..cda49a34b 100644
--- a/core/vm/runtime/runtime.go
+++ b/core/vm/runtime/runtime.go
@@ -52,7 +52,7 @@ type Config struct {
 func setDefaults(cfg *Config) {
 	if cfg.ChainConfig == nil {
 		cfg.ChainConfig = &params.ChainConfig{
-			ChainId:        big.NewInt(1),
+			ChainID:        big.NewInt(1),
 			HomesteadBlock: new(big.Int),
 			DAOForkBlock:   new(big.Int),
 			DAOForkSupport: false,
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index a524dbadd..87eba7e1a 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -354,7 +354,7 @@ func (s *PrivateAccountAPI) signTransaction(ctx context.Context, args SendTxArgs
 
 	var chainID *big.Int
 	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainId
+		chainID = config.ChainID
 	}
 	return wallet.SignTxWithPassphrase(account, passwd, tx, chainID)
 }
@@ -1096,7 +1096,7 @@ func (s *PublicTransactionPoolAPI) sign(addr common.Address, tx *types.Transacti
 	// Request the wallet to sign the transaction
 	var chainID *big.Int
 	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainId
+		chainID = config.ChainID
 	}
 	return wallet.SignTx(account, tx, chainID)
 }
@@ -1216,7 +1216,7 @@ func (s *PublicTransactionPoolAPI) SendTransaction(ctx context.Context, args Sen
 
 	var chainID *big.Int
 	if config := s.b.ChainConfig(); config.IsEIP155(s.b.CurrentBlock().Number()) {
-		chainID = config.ChainId
+		chainID = config.ChainID
 	}
 	signed, err := wallet.SignTx(account, tx, chainID)
 	if err != nil {
diff --git a/light/txpool.go b/light/txpool.go
index 1fabc3dc5..5b4d06d90 100644
--- a/light/txpool.go
+++ b/light/txpool.go
@@ -89,7 +89,7 @@ type TxRelayBackend interface {
 func NewTxPool(config *params.ChainConfig, chain *LightChain, relay TxRelayBackend) *TxPool {
 	pool := &TxPool{
 		config:      config,
-		signer:      types.NewEIP155Signer(config.ChainId),
+		signer:      types.NewEIP155Signer(config.ChainID),
 		nonce:       make(map[common.Address]uint64),
 		pending:     make(map[common.Hash]*types.Transaction),
 		mined:       make(map[common.Hash][]*types.Transaction),
diff --git a/miner/worker.go b/miner/worker.go
index 4913ba22e..ff48ecabc 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -360,7 +360,7 @@ func (self *worker) makeCurrent(parent *types.Block, header *types.Header) error
 	}
 	work := &Work{
 		config:    self.config,
-		signer:    types.NewEIP155Signer(self.config.ChainId),
+		signer:    types.NewEIP155Signer(self.config.ChainID),
 		state:     state,
 		ancestors: set.New(),
 		family:    set.New(),
diff --git a/params/config.go b/params/config.go
index dc02c7ca3..6e6a5cb8b 100644
--- a/params/config.go
+++ b/params/config.go
@@ -23,15 +23,16 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 )
 
+// Genesis hashes to enforce below configs on.
 var (
-	MainnetGenesisHash = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3") // Mainnet genesis hash to enforce below configs on
-	TestnetGenesisHash = common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d") // Testnet genesis hash to enforce below configs on
+	MainnetGenesisHash = common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")
+	TestnetGenesisHash = common.HexToHash("0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d")
 )
 
 var (
 	// MainnetChainConfig is the chain parameters to run a node on the main network.
 	MainnetChainConfig = &ChainConfig{
-		ChainId:             big.NewInt(1),
+		ChainID:             big.NewInt(1),
 		HomesteadBlock:      big.NewInt(1150000),
 		DAOForkBlock:        big.NewInt(1920000),
 		DAOForkSupport:      true,
@@ -46,7 +47,7 @@ var (
 
 	// TestnetChainConfig contains the chain parameters to run a node on the Ropsten test network.
 	TestnetChainConfig = &ChainConfig{
-		ChainId:             big.NewInt(3),
+		ChainID:             big.NewInt(3),
 		HomesteadBlock:      big.NewInt(0),
 		DAOForkBlock:        nil,
 		DAOForkSupport:      true,
@@ -61,7 +62,7 @@ var (
 
 	// RinkebyChainConfig contains the chain parameters to run a node on the Rinkeby test network.
 	RinkebyChainConfig = &ChainConfig{
-		ChainId:             big.NewInt(4),
+		ChainID:             big.NewInt(4),
 		HomesteadBlock:      big.NewInt(1),
 		DAOForkBlock:        nil,
 		DAOForkSupport:      true,
@@ -101,7 +102,7 @@ var (
 // that any network, identified by its genesis block, can have its own
 // set of configuration options.
 type ChainConfig struct {
-	ChainId *big.Int `json:"chainId"` // Chain id identifies the current chain and is used for replay protection
+	ChainID *big.Int `json:"chainId"` // chainId identifies the current chain and is used for replay protection
 
 	HomesteadBlock *big.Int `json:"homesteadBlock,omitempty"` // Homestead switch block (nil = no fork, 0 = already homestead)
 
@@ -154,7 +155,7 @@ func (c *ChainConfig) String() string {
 		engine = "unknown"
 	}
 	return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Byzantium: %v Constantinople: %v Engine: %v}",
-		c.ChainId,
+		c.ChainID,
 		c.HomesteadBlock,
 		c.DAOForkBlock,
 		c.DAOForkSupport,
@@ -172,27 +173,32 @@ func (c *ChainConfig) IsHomestead(num *big.Int) bool {
 	return isForked(c.HomesteadBlock, num)
 }
 
-// IsDAO returns whether num is either equal to the DAO fork block or greater.
+// IsDAOFork returns whether num is either equal to the DAO fork block or greater.
 func (c *ChainConfig) IsDAOFork(num *big.Int) bool {
 	return isForked(c.DAOForkBlock, num)
 }
 
+// IsEIP150 returns whether num is either equal to the EIP150 fork block or greater.
 func (c *ChainConfig) IsEIP150(num *big.Int) bool {
 	return isForked(c.EIP150Block, num)
 }
 
+// IsEIP155 returns whether num is either equal to the EIP155 fork block or greater.
 func (c *ChainConfig) IsEIP155(num *big.Int) bool {
 	return isForked(c.EIP155Block, num)
 }
 
+// IsEIP158 returns whether num is either equal to the EIP158 fork block or greater.
 func (c *ChainConfig) IsEIP158(num *big.Int) bool {
 	return isForked(c.EIP158Block, num)
 }
 
+// IsByzantium returns whether num is either equal to the Byzantium fork block or greater.
 func (c *ChainConfig) IsByzantium(num *big.Int) bool {
 	return isForked(c.ByzantiumBlock, num)
 }
 
+// IsConstantinople returns whether num is either equal to the Constantinople fork block or greater.
 func (c *ChainConfig) IsConstantinople(num *big.Int) bool {
 	return isForked(c.ConstantinopleBlock, num)
 }
@@ -251,7 +257,7 @@ func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *Confi
 	if isForkIncompatible(c.EIP158Block, newcfg.EIP158Block, head) {
 		return newCompatError("EIP158 fork block", c.EIP158Block, newcfg.EIP158Block)
 	}
-	if c.IsEIP158(head) && !configNumEqual(c.ChainId, newcfg.ChainId) {
+	if c.IsEIP158(head) && !configNumEqual(c.ChainID, newcfg.ChainID) {
 		return newCompatError("EIP158 chain ID", c.EIP158Block, newcfg.EIP158Block)
 	}
 	if isForkIncompatible(c.ByzantiumBlock, newcfg.ByzantiumBlock, head) {
@@ -324,15 +330,16 @@ func (err *ConfigCompatError) Error() string {
 // Rules is a one time interface meaning that it shouldn't be used in between transition
 // phases.
 type Rules struct {
-	ChainId                                   *big.Int
+	ChainID                                   *big.Int
 	IsHomestead, IsEIP150, IsEIP155, IsEIP158 bool
 	IsByzantium                               bool
 }
 
+// Rules ensures c's ChainID is not nil.
 func (c *ChainConfig) Rules(num *big.Int) Rules {
-	chainId := c.ChainId
-	if chainId == nil {
-		chainId = new(big.Int)
+	chainID := c.ChainID
+	if chainID == nil {
+		chainID = new(big.Int)
 	}
-	return Rules{ChainId: new(big.Int).Set(chainId), IsHomestead: c.IsHomestead(num), IsEIP150: c.IsEIP150(num), IsEIP155: c.IsEIP155(num), IsEIP158: c.IsEIP158(num), IsByzantium: c.IsByzantium(num)}
+	return Rules{ChainID: new(big.Int).Set(chainID), IsHomestead: c.IsHomestead(num), IsEIP150: c.IsEIP150(num), IsEIP155: c.IsEIP155(num), IsEIP158: c.IsEIP158(num), IsByzantium: c.IsByzantium(num)}
 }
diff --git a/params/denomination.go b/params/denomination.go
index 9e1b52506..1a309827d 100644
--- a/params/denomination.go
+++ b/params/denomination.go
@@ -16,12 +16,12 @@
 
 package params
 
+// These are the multipliers for ether denominations.
+// Example: To get the wei value of an amount in 'douglas', use
+//
+//    new(big.Int).Mul(value, big.NewInt(params.Douglas))
+//
 const (
-	// These are the multipliers for ether denominations.
-	// Example: To get the wei value of an amount in 'douglas', use
-	//
-	//    new(big.Int).Mul(value, big.NewInt(params.Douglas))
-	//
 	Wei      = 1
 	Ada      = 1e3
 	Babbage  = 1e6
diff --git a/params/gas_table.go b/params/gas_table.go
index 4969382b1..d33bebbe5 100644
--- a/params/gas_table.go
+++ b/params/gas_table.go
@@ -16,6 +16,7 @@
 
 package params
 
+// GasTable organizes gas prices for different ethereum phases.
 type GasTable struct {
 	ExtcodeSize uint64
 	ExtcodeCopy uint64
@@ -34,6 +35,7 @@ type GasTable struct {
 	CreateBySuicide uint64
 }
 
+// Variables containing gas prices for different ethereum phases.
 var (
 	// GasTableHomestead contain the gas prices for
 	// the homestead phase.
@@ -47,8 +49,8 @@ var (
 		ExpByte:     10,
 	}
 
-	// GasTableHomestead contain the gas re-prices for
-	// the homestead phase.
+	// GasTableEIP150 contain the gas re-prices for
+	// the EIP150 phase.
 	GasTableEIP150 = GasTable{
 		ExtcodeSize: 700,
 		ExtcodeCopy: 700,
@@ -60,7 +62,8 @@ var (
 
 		CreateBySuicide: 25000,
 	}
-
+	// GasTableEIP158 contain the gas re-prices for
+	// the EIP15* phase.
 	GasTableEIP158 = GasTable{
 		ExtcodeSize: 700,
 		ExtcodeCopy: 700,
diff --git a/params/protocol_params.go b/params/protocol_params.go
index 5a0b14d61..1ea9c5813 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -19,7 +19,7 @@ package params
 import "math/big"
 
 var (
-	TargetGasLimit uint64 = GenesisGasLimit // The artificial target
+	TargetGasLimit = GenesisGasLimit // The artificial target
 )
 
 const (
diff --git a/tests/block_test_util.go b/tests/block_test_util.go
index a72799f6e..2db47da57 100644
--- a/tests/block_test_util.go
+++ b/tests/block_test_util.go
@@ -42,6 +42,7 @@ type BlockTest struct {
 	json btJSON
 }
 
+// UnmarshalJSON implements json.Unmarshaler interface.
 func (t *BlockTest) UnmarshalJSON(in []byte) error {
 	return json.Unmarshal(in, &t.json)
 }
diff --git a/tests/difficulty_test.go b/tests/difficulty_test.go
index 600637300..20294cc9d 100644
--- a/tests/difficulty_test.go
+++ b/tests/difficulty_test.go
@@ -27,7 +27,7 @@ import (
 
 var (
 	mainnetChainConfig = params.ChainConfig{
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(1150000),
 		DAOForkBlock:   big.NewInt(1920000),
 		DAOForkSupport: true,
diff --git a/tests/init.go b/tests/init.go
index 0bea5ccd6..af65f9206 100644
--- a/tests/init.go
+++ b/tests/init.go
@@ -26,26 +26,26 @@ import (
 // Forks table defines supported forks and their chain config.
 var Forks = map[string]*params.ChainConfig{
 	"Frontier": {
-		ChainId: big.NewInt(1),
+		ChainID: big.NewInt(1),
 	},
 	"Homestead": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 	},
 	"EIP150": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		EIP150Block:    big.NewInt(0),
 	},
 	"EIP158": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		EIP150Block:    big.NewInt(0),
 		EIP155Block:    big.NewInt(0),
 		EIP158Block:    big.NewInt(0),
 	},
 	"Byzantium": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		EIP150Block:    big.NewInt(0),
 		EIP155Block:    big.NewInt(0),
@@ -54,22 +54,22 @@ var Forks = map[string]*params.ChainConfig{
 		ByzantiumBlock: big.NewInt(0),
 	},
 	"FrontierToHomesteadAt5": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(5),
 	},
 	"HomesteadToEIP150At5": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		EIP150Block:    big.NewInt(5),
 	},
 	"HomesteadToDaoAt5": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		DAOForkBlock:   big.NewInt(5),
 		DAOForkSupport: true,
 	},
 	"EIP158ToByzantiumAt5": {
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 		HomesteadBlock: big.NewInt(0),
 		EIP150Block:    big.NewInt(0),
 		EIP155Block:    big.NewInt(0),
diff --git a/tests/transaction_test.go b/tests/transaction_test.go
index c743996c2..42ad81877 100644
--- a/tests/transaction_test.go
+++ b/tests/transaction_test.go
@@ -35,7 +35,7 @@ func TestTransaction(t *testing.T) {
 		EIP150Block:    big.NewInt(0),
 		EIP155Block:    big.NewInt(0),
 		EIP158Block:    big.NewInt(0),
-		ChainId:        big.NewInt(1),
+		ChainID:        big.NewInt(1),
 	})
 	txt.config(`^Byzantium/`, params.ChainConfig{
 		HomesteadBlock: big.NewInt(0),