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ETH源码学习（1）创建私有链

ETH源码学习（1）创建私有链

因为要分析源码，所以不是像网上命令行执行，而是使用goland debug

参数
--datadir "/Users/zhangnan/Downloads/self_eth/" init "/Users/zhangnan/Downloads/geth/genesis.json"

初始化
func initGenesis(ctx *cli.Context) error {
    // Make sure we have a valid genesis JSON
    genesisPath := ctx.Args().First()
    if len(genesisPath) == 0 {
        utils.Fatalf("Must supply path to genesis JSON file")
    }
    file, err := os.Open(genesisPath)
    if err != nil {
        utils.Fatalf("Failed to read genesis file: %v", err)
    }
    defer file.Close()

    genesis := new(core.Genesis)
    if err := json.NewDecoder(file).Decode(genesis); err != nil {
        utils.Fatalf("invalid genesis file: %v", err)
    }
//以上是读初始化文件，下面开始第一个重要步骤，配置config
    // Open and initialise both full and light databases
    stack, _ := makeConfigNode(ctx)
    defer stack.Close()

    for _, name := range []string{"chaindata", "lightchaindata"} {
        chaindb, err := stack.OpenDatabase(name, 0, 0, "", false)
        if err != nil {
            utils.Fatalf("Failed to open database: %v", err)
        }
        _, hash, err := core.SetupGenesisBlock(chaindb, genesis)
        if err != nil {
            utils.Fatalf("Failed to write genesis block: %v", err)
        }
        chaindb.Close()
        log.Info("Successfully wrote genesis state", "database", name, "hash", hash)
    }
    return nil
}

因为要分析源码，所以不是像网上命令行执行，而是使用goland debug

参数
--datadir "/Users/zhangnan/Downloads/self_eth/" init "/Users/zhangnan/Downloads/geth/genesis.json"

初始化
func initGenesis(ctx *cli.Context) error {
    // Make sure we have a valid genesis JSON
    genesisPath := ctx.Args().First()
    if len(genesisPath) == 0 {
        utils.Fatalf("Must supply path to genesis JSON file")
    }
    file, err := os.Open(genesisPath)
    if err != nil {
        utils.Fatalf("Failed to read genesis file: %v", err)
    }
    defer file.Close()

    genesis := new(core.Genesis)
    if err := json.NewDecoder(file).Decode(genesis); err != nil {
        utils.Fatalf("invalid genesis file: %v", err)
    }
//以上是读初始化文件，下面开始第一个重要步骤，配置config
    // Open and initialise both full and light databases
    stack, _ := makeConfigNode(ctx)
    defer stack.Close()

    for _, name := range []string{"chaindata", "lightchaindata"} {
        chaindb, err := stack.OpenDatabase(name, 0, 0, "", false)
        if err != nil {
            utils.Fatalf("Failed to open database: %v", err)
        }
        _, hash, err := core.SetupGenesisBlock(chaindb, genesis)
        if err != nil {
            utils.Fatalf("Failed to write genesis block: %v", err)
        }
        chaindb.Close()
        log.Info("Successfully wrote genesis state", "database", name, "hash", hash)
    }
    return nil
}