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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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42
cmd/geth/main.go
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@ -32,7 +32,9 @@ import (
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
@ -108,7 +110,6 @@ Runs quick benchmark on first GPU found.
The output of this command is supposed to be machine-readable.
`,
},
{
Name: "wallet",
Usage: "ethereum presale wallet",
@ -247,6 +248,16 @@ nodes.
},
},
},
{
Action: initGenesis,
Name: "init",
Usage: "bootstraps and initialises a new genesis block (JSON)",
Description: `
The init command initialises a new genesis block and definition for the network.
This is a destructive action and changes the network in which you will be
participating.
`,
},
{
Action: console,
Name: "console",
@ -255,7 +266,8 @@ nodes.
The Geth console is an interactive shell for the JavaScript runtime environment
which exposes a node admin interface as well as the Ðapp JavaScript API.
See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console
`},
`,
},
{
Action: attach,
Name: "attach",
@ -347,7 +359,6 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
go metrics.CollectProcessMetrics(3 * time.Second)
utils.SetupNetwork(ctx)
utils.SetupVM(ctx)
return nil
}
@ -417,6 +428,31 @@ func attach(ctx *cli.Context) {
}
}
// initGenesis will initialise the given JSON format genesis file and writes it as
// the zero'd block (i.e. genesis) or will fail hard if it can't succeed.
func initGenesis(ctx *cli.Context) {
genesisPath := ctx.Args().First()
if len(genesisPath) == 0 {
utils.Fatalf("must supply path to genesis JSON file")
}
chainDb, err := ethdb.NewLDBDatabase(filepath.Join(utils.MustMakeDataDir(ctx), "chaindata"), 0, 0)
if err != nil {
utils.Fatalf("could not open database: %v", err)
}
genesisFile, err := os.Open(genesisPath)
if err != nil {
utils.Fatalf("failed to read genesis file: %v", err)
}
block, err := core.WriteGenesisBlock(chainDb, genesisFile)
if err != nil {
utils.Fatalf("failed to write genesis block: %v", err)
}
glog.V(logger.Info).Infof("successfully wrote genesis block and/or chain rule set: %x", block.Hash())
}
// console starts a new geth node, attaching a JavaScript console to it at the
// same time.
func console(ctx *cli.Context) {