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core: added basic chain configuration

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Added chain configuration options and write out during genesis database
insertion. If no "config" was found, nothing is written to the database.

Configurations are written on a per genesis base. This means
that any chain (which is identified by it's genesis hash) can have their
own chain settings.
This commit is contained in:
Jeffrey Wilcke
2016-03-01 23:32:43 +01:00
committed by Jeffrey Wilcke
parent 10d3466c93
commit f0cbebb19f
55 changed files with 732 additions and 431 deletions
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72
cmd/utils/flags.go
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@ -34,7 +34,6 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethdb"
@ -173,6 +172,11 @@ var (
Name: "minergpus",
Usage: "List of GPUs to use for mining (e.g. '0,1' will use the first two GPUs found)",
}
TargetGasLimitFlag = cli.StringFlag{
Name: "targetgaslimit",
Usage: "Target gas limit sets the artificial target gas floor for the blocks to mine",
Value: params.GenesisGasLimit.String(),
}
AutoDAGFlag = cli.BoolFlag{
Name: "autodag",
Usage: "Enable automatic DAG pregeneration",
@ -656,6 +660,7 @@ func MakeSystemNode(name, version string, extra []byte, ctx *cli.Context) *node.
accman := MakeAccountManager(ctx)
ethConf := &eth.Config{
ChainConfig: MustMakeChainConfig(ctx),
Genesis: MakeGenesisBlock(ctx),
FastSync: ctx.GlobalBool(FastSyncFlag.Name),
BlockChainVersion: ctx.GlobalInt(BlockchainVersionFlag.Name),
@ -701,8 +706,6 @@ func MakeSystemNode(name, version string, extra []byte, ctx *cli.Context) *node.
ethConf.Genesis = core.TestNetGenesisBlock()
}
state.StartingNonce = 1048576 // (2**20)
// overwrite homestead block
params.HomesteadBlock = params.TestNetHomesteadBlock
case ctx.GlobalBool(DevModeFlag.Name):
// Override the base network stack configs
@ -758,25 +761,56 @@ func SetupNetwork(ctx *cli.Context) {
core.BlockReward = big.NewInt(1.5e+18)
core.ExpDiffPeriod = big.NewInt(math.MaxInt64)
}
params.TargetGasLimit = common.String2Big(ctx.GlobalString(TargetGasLimitFlag.Name))
}
// SetupVM configured the VM package's global settings
func SetupVM(ctx *cli.Context) {
vm.EnableJit = ctx.GlobalBool(VMEnableJitFlag.Name)
vm.ForceJit = ctx.GlobalBool(VMForceJitFlag.Name)
vm.SetJITCacheSize(ctx.GlobalInt(VMJitCacheFlag.Name))
// MustMakeChainConfig reads the chain configuration from the given database.
func MustMakeChainConfig(ctx *cli.Context) *core.ChainConfig {
var (
db = MakeChainDatabase(ctx)
genesis = core.GetBlock(db, core.GetCanonicalHash(db, 0))
)
defer db.Close()
chainConfig, err := core.GetChainConfig(db, genesis.Hash())
if err != nil {
if err != core.ChainConfigNotFoundErr {
Fatalf("Could not make chain configuration: %v", err)
}
var homesteadBlockNo *big.Int
if ctx.GlobalBool(TestNetFlag.Name) {
homesteadBlockNo = params.TestNetHomesteadBlock
} else {
homesteadBlockNo = params.MainNetHomesteadBlock
}
chainConfig = &core.ChainConfig{
HomesteadBlock: homesteadBlockNo,
}
}
return chainConfig
}
// MakeChainDatabase open an LevelDB using the flags passed to the client and will hard crash if it fails.
func MakeChainDatabase(ctx *cli.Context) ethdb.Database {
var (
datadir = MustMakeDataDir(ctx)
cache = ctx.GlobalInt(CacheFlag.Name)
handles = MakeDatabaseHandles()
)
chainDb, err := ethdb.NewLDBDatabase(filepath.Join(datadir, "chaindata"), cache, handles)
if err != nil {
Fatalf("Could not open database: %v", err)
}
return chainDb
}
// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database) {
datadir := MustMakeDataDir(ctx)
cache := ctx.GlobalInt(CacheFlag.Name)
handles := MakeDatabaseHandles()
var err error
if chainDb, err = ethdb.NewLDBDatabase(filepath.Join(datadir, "chaindata"), cache, handles); err != nil {
Fatalf("Could not open database: %v", err)
}
chainDb = MakeChainDatabase(ctx)
if ctx.GlobalBool(OlympicFlag.Name) {
_, err := core.WriteTestNetGenesisBlock(chainDb)
if err != nil {
@ -784,10 +818,10 @@ func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database
}
}
eventMux := new(event.TypeMux)
pow := ethash.New()
//genesis := core.GenesisBlock(uint64(ctx.GlobalInt(GenesisNonceFlag.Name)), blockDB)
chain, err = core.NewBlockChain(chainDb, pow, eventMux)
chainConfig := MustMakeChainConfig(ctx)
var eventMux event.TypeMux
chain, err = core.NewBlockChain(chainDb, chainConfig, ethash.New(), &eventMux)
if err != nil {
Fatalf("Could not start chainmanager: %v", err)
}