wemeetagain/go-hdwallet

Go utilities for generating hierarchical deterministic Bitcoin wallets based on BIP 32

Go HD Wallet tools

• BIP32 - https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
• Documentation - http://godoc.org/github.com/wemeetagain/go-hdwallet

Get this library

    go get github.com/wemeetagain/go-hdwallet

Example

    // Generate a random 256 bit seed
    seed, err := hdwallet.GenSeed(256)
    
    // Create a master private key
    masterprv := hdwallet.MasterKey(seed)
    
    // Convert a private key to public key
    masterpub := masterprv.Pub()
    
    // Generate new child key based on private or public key
    childprv, err := masterprv.Child(0)
    childpub, err := masterpub.Child(0)
    
    // Create bitcoin address from public key
    address := childpub.Address()

    // Convenience string -> string Child and ToAddress functions
    walletstring := childpub.String()
    childstring, err := hdwallet.StringChild(walletstring, 0)
    childaddress, err := hdwallet.StringAddress(childstring)

Dependencies

    go get golang.org/x/crypto/ripemd160
    go get github.com/btcsuite/btcutil/base58
    go get github.com/btcsuite/btcd/btcec

License

Unlicense

go-hdwallet's Issues

length of addPrivKeys‘s result is <=33

advice as follow:
func addPrivKeys(k1, k2 []byte) []byte {
i1 := big.NewInt(0).SetBytes(k1)
i2 := big.NewInt(0).SetBytes(k2)
i1.Add(i1, i2)
i1.Mod(i1, curve.Params().N)
k := i1.Bytes()
k = append(make([]byte, 33 - len(k)), k...)
return k
}

how can i get private key

when i create master private key, how can i get it.
how can i get the private key that i can copy to the wallet, and use it @wemeetagain

Description

My request is that a description is added in the readme on what the purpose of this is and why someone would use it over just using https://github.com/btcsuite/btcutil/tree/master/hdkeychain directly. Id like to know. thx.

StringWallet method crashes at some paticular xpub

walletstring := "xpub69h25So7Uyn2eBeQEMSz5CCEzB5xNCfXqRrQHPsS5czEuobfNXnGujVggFExRgozt6ujR85UaR9DHdGUhGaNL6CRP8xhpEXJJaa9rGytn7C"
childstring, _ := hdwallet.StringChild(walletstring, 36)

When I execute this code, I faced with the error message:

goroutine 1 [running]: github.com/WeMeetAgain/go-hdwallet.expand(0xc4200129e0, 0x20, 0x20, 0xc42000b5a0, 0xc42000b5c0) /Users/user/src/src/github.com/WeMeetAgain/go-hdwallet/util.go:90 +0x293 github.com/WeMeetAgain/go-hdwallet.addPubKeys(0xc4200129e0, 0x20, 0x20, 0xc4200783ed, 0x21, 0x25, 0x40, 0x70, 0x80) /Users/user/src/src/github.com/WeMeetAgain/go-hdwallet/util.go:115 +0x43 github.com/WeMeetAgain/go-hdwallet.(*HDWallet).Child(0xc4203aa180, 0x24, 0xc4203aa180, 0x0, 0x0) /Users/user/src/src/github.com/WeMeetAgain/go-hdwallet/hdwallet.go:74 +0xb5d github.com/WeMeetAgain/go-hdwallet.StringChild(0x1108092, 0x6f, 0x24, 0x23, 0x0, 0x0, 0x8) /Users/user/src/src/github.com/WeMeetAgain/go-hdwallet/hdwallet.go:128 +0x5e main.main() /Users/user/src/src/github.com/rustace/hdwallet/gohdwallet.go:34 +0x165 exit status 2

is there a way to use a key generated by the bitcoin core?

I have a hd wallet generated by the bitcoin core client, is it possible to use that key with this library?

So my addresses are created programatically and then imported on the client?

how can i get the private key of a specified child address from master private key ?

title tells everything @wemeetagain

Serialize mutates HDWallet

As pointed out #4