all: define Berlin hard fork spec

cmd/geth/config.go

@@ -20,6 +20,7 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"math/big"
 	"os"
 	"reflect"
 	"unicode"
@@ -165,7 +166,9 @@ func checkWhisper(ctx *cli.Context) {
 // makeFullNode loads geth configuration and creates the Ethereum backend.
 func makeFullNode(ctx *cli.Context) (*node.Node, ethapi.Backend) {
 	stack, cfg := makeConfigNode(ctx)
-
+	if ctx.GlobalIsSet(utils.OverrideBerlinFlag.Name) {
+		cfg.Eth.OverrideBerlin = new(big.Int).SetUint64(ctx.GlobalUint64(utils.OverrideBerlinFlag.Name))
+	}
 	backend := utils.RegisterEthService(stack, &cfg.Eth)
 
 	checkWhisper(ctx)

cmd/geth/main.go

@@ -69,6 +69,7 @@ var (
 		utils.NoUSBFlag,
 		utils.USBFlag,
 		utils.SmartCardDaemonPathFlag,
+		utils.OverrideBerlinFlag,
 		utils.EthashCacheDirFlag,
 		utils.EthashCachesInMemoryFlag,
 		utils.EthashCachesOnDiskFlag,

cmd/puppeth/wizard_genesis.go

@@ -235,6 +235,10 @@ func (w *wizard) manageGenesis() {
 		fmt.Printf("Which block should Istanbul come into effect? (default = %v)\n", w.conf.Genesis.Config.IstanbulBlock)
 		w.conf.Genesis.Config.IstanbulBlock = w.readDefaultBigInt(w.conf.Genesis.Config.IstanbulBlock)
 
+		fmt.Println()
+		fmt.Printf("Which block should Berlin come into effect? (default = %v)\n", w.conf.Genesis.Config.BerlinBlock)
+		w.conf.Genesis.Config.BerlinBlock = w.readDefaultBigInt(w.conf.Genesis.Config.BerlinBlock)
+
 		fmt.Println()
 		fmt.Printf("Which block should YOLOv3 come into effect? (default = %v)\n", w.conf.Genesis.Config.YoloV3Block)
 		w.conf.Genesis.Config.YoloV3Block = w.readDefaultBigInt(w.conf.Genesis.Config.YoloV3Block)

cmd/utils/flags.go

@@ -230,6 +230,10 @@ var (
 		Usage: "Megabytes of memory allocated to bloom-filter for pruning",
 		Value: 2048,
 	}
+	OverrideBerlinFlag = cli.Uint64Flag{
+		Name:  "override.berlin",
+		Usage: "Manually specify Berlin fork-block, overriding the bundled setting",
+	}
 	// Light server and client settings
 	LightServeFlag = cli.IntFlag{
 		Name:  "light.serve",