Created
June 12, 2019 11:18
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import scala.util.Success | |
import org.bitcoins.core.protocol.script._ | |
import org.bitcoins.core.protocol.Bech32Address | |
import org.bitcoins.core.config.TestNet3 | |
// first account -------┐ | |
// bitcoin ----------┐ | | |
// segwit --------┐ | | | |
val accountPath = BIP32Path.fromString("m/84'/0'/0'") | |
// accountPath: BIP32Path = m/84'/0'/0' | |
val accountXpub = { | |
// this key is sensitive, keep away from prying eyes! | |
val accountXpriv = xpriv.deriveChildPrivKey(accountPath) | |
// this key is not sufficient to spend from, but we | |
// can generate addresses with it! | |
accountXpriv.extPublicKey | |
} | |
// accountXpub: ExtPublicKey = zpub6rFVjPLJN2jSekPmRnBZAuLXy9K82puEBdHnf7Dt9LutwRhBjHRn9iZXwJijfbcpwugM5FNQe2pHfBcXjefbf6KSj7ueP9e3qL32JVyexKr | |
// address no. 0 ---------------┐ | |
// external address ----------┐ | | |
val firstAddressPath = SegWitHDPath.fromString("m/84'/0'/0'/0/0") | |
// firstAddressPath: SegWitHDPath = m/84'/0'/0'/0/0 | |
val firstAccountAddress = { | |
// this is a bit quirky, but we're not interesting in | |
// deriving the complete path from our account xpub | |
// instead, we're only interested in the part after | |
// the account level (3rd level). the .diff() method | |
// achieves that | |
val Some(pathDiff) = accountPath.diff(firstAddressPath) | |
// deriving public keys from hardened extended keys | |
// is not possible, that's why .deriveChildPubKey() | |
// returns a Try[ExtPublicKey]. A hardened key is marked | |
// by a ' after the number in the notation we use above. | |
val Success(extPubKey) = accountXpub.deriveChildPubKey(pathDiff) | |
val pubkey = extPubKey.key | |
val scriptPubKey = P2WPKHWitnessSPKV0(pubkey) | |
Bech32Address(scriptPubKey, TestNet3) | |
} | |
// firstAccountAddress: Bech32Address = Bech32Address(tb1qdymd8a5z85d6nrafn3p7few8z7pk5spd4qejmx) | |
// tada! We just generated an address you can send money to, | |
// without having access to the private key! | |
firstAccountAddress.value | |
// res2: String = tb1qdymd8a5z85d6nrafn3p7few8z7pk5spd4qejmx | |
// you can now continue deriving addresses from the same public | |
// key, by imitating what we did above. To get the next | |
// HD path to generate an address at: | |
val nextAddressPath: SegWitHDPath = firstAddressPath.next | |
// nextAddressPath: SegWitHDPath = m/84'/0'/0'/0/1 |
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