分層確定性錢包(HD)

用golang開發比特幣錢包必備。先寫一下使用，後面會進行充分補充

package mainimport (    "fmt"    "github.com/bcext/cashutil/hdkeychain"    "github.com/bcext/gcash/chaincfg")func main() {    seed, err := hdkeychain.GenerateSeed(hdkeychain.RecommendedSeedLen)    if err != nil {        panic(err)    }    key, err := hdkeychain.NewMaster(seed, &chaincfg.TestNet3Params)    if err != nil {        panic(err)    }    keyStr := key.String()    // output: tprv8ZgxMBicQKsPdFH9KwqSxs4mhxxKQ1fhAXvTHsTrztRzn4MF42ySDtS1AkTciqWY6FRfQy8pnBrrmJ1CbcQXZ7iaiWiXiM8W24K3KabEYtY    fmt.Println(keyStr)    generatedKey, err := hdkeychain.NewKeyFromString(keyStr)    if err != nil {        panic(err)    }    child0, err := generatedKey.Child(hdkeychain.HardenedKeyStart + 0)    if err != nil {        panic(err)    }    child0Address, err := child0.Address(&chaincfg.TestNet3Params)    if err != nil {        panic(err)    }    fmt.Println("child0 address:", child0Address.EncodeAddress(true))    child00Extend, err := child0.Child(0)    if err != nil {        panic(err)    }    child00ExtendAddress, err := child00Extend.Address(&chaincfg.TestNet3Params)    if err != nil {        panic(err)    }    fmt.Println("child0's extended address:", child00ExtendAddress.EncodeAddress(true))    child01Internal, err := child0.Child(1)    if err != nil {        panic(err)    }    // 可以使用主網編碼地址    child01InternalAddress, err := child01Internal.Address(&chaincfg.MainNetParams)    if err != nil {        panic(err)    }    fmt.Println("child0's internal address:", child01InternalAddress.EncodeAddress(true))    fmt.Println("child00Extended is privkey?", child00Extend.IsPrivate())    fmt.Println("child01Internal is privkey?", child01Internal.IsPrivate())    extenedKey, err := child01Internal.Neuter()    if err != nil {        panic(err)    }    fmt.Println("extendedKey string:", extenedKey.String())}