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use crate::core_types::StdSignature;
use crate::errors::{ErrorKind, Result};
use crate::keys::PublicKey;
use bitcoin::secp256k1::Secp256k1;
use bitcoin::secp256k1::{All, Message};
use bitcoin::util::bip32::{ExtendedPrivKey, IntoDerivationPath};
use bitcoin::Network;
use crypto::sha2::Sha256;
use crypto::digest::Digest;
use hkd32::mnemonic::{Phrase, Seed};
use rand_core::OsRng;
pub static LUNA_COIN_TYPE: u32 = 330;
pub struct PrivateKey {
#[allow(missing_docs)]
pub account: u32,
#[allow(missing_docs)]
pub index: u32,
#[allow(missing_docs)]
pub coin_type: u32,
mnemonic: Option<Phrase>,
#[allow(dead_code)]
root_private_key: ExtendedPrivKey,
private_key: ExtendedPrivKey,
}
impl PrivateKey {
pub fn new<'a>(secp: &Secp256k1<All>) -> Result<PrivateKey> {
let phrase =
hkd32::mnemonic::Phrase::random(&mut OsRng, hkd32::mnemonic::Language::English);
PrivateKey::gen_private_key_phrase(secp, phrase, 0, 0, LUNA_COIN_TYPE, "")
}
pub fn new_seed<'a>(secp: &Secp256k1<All>, seed_phrase: &str) -> Result<PrivateKey> {
let phrase =
hkd32::mnemonic::Phrase::random(&mut OsRng, hkd32::mnemonic::Language::English);
PrivateKey::gen_private_key_phrase(secp, phrase, 0, 0, LUNA_COIN_TYPE, seed_phrase)
}
pub fn from_words(secp: &Secp256k1<All>, words: &str) -> Result<PrivateKey> {
match hkd32::mnemonic::Phrase::new(words, hkd32::mnemonic::Language::English) {
Ok(phrase) => {
PrivateKey::gen_private_key_phrase(secp, phrase, 0, 0, LUNA_COIN_TYPE, "")
}
Err(_) => Err(ErrorKind::Phrasing.into()),
}
}
pub fn from_words_seed(
secp: &Secp256k1<All>,
words: &str,
seed_pass: &str,
) -> Result<PrivateKey> {
match hkd32::mnemonic::Phrase::new(words, hkd32::mnemonic::Language::English) {
Ok(phrase) => {
PrivateKey::gen_private_key_phrase(secp, phrase, 0, 0, LUNA_COIN_TYPE, seed_pass)
}
Err(_) => Err(ErrorKind::Phrasing.into()),
}
}
pub fn public_key(&self, secp: &Secp256k1<All>) -> PublicKey {
let x = &self.private_key.private_key.public_key(secp);
PublicKey::from_bitcoin_public_key(x)
}
fn gen_private_key_phrase(
secp: &Secp256k1<All>,
phrase: Phrase,
account: u32,
index: u32,
coin_type: u32,
seed_phrase: &str,
) -> Result<PrivateKey> {
let seed = phrase.to_seed(seed_phrase);
let root_private_key =
ExtendedPrivKey::new_master(Network::Bitcoin, &seed.as_bytes()).unwrap();
let path = format!("m/44'/{}'/{}'/0/{}", coin_type, account, index);
let derivation_path = path.into_derivation_path()?;
let private_key = root_private_key.derive_priv(secp, &derivation_path)?;
Ok(PrivateKey {
account,
index,
coin_type,
mnemonic: Some(phrase),
root_private_key,
private_key,
})
}
pub fn words(&self) -> Option<&str> {
match &self.mnemonic {
Some(phrase) => Some(phrase.phrase()),
None => None,
}
}
pub fn sign(&self, secp: &Secp256k1<All>, blob: &str) -> Result<StdSignature> {
let pub_k = &self.private_key.private_key.public_key(secp);
let priv_k = self.private_key.private_key.key;
let mut sha = Sha256::new();
let mut sha_result: [u8; 32] = [0; 32];
sha.input_str(blob);
sha.result(&mut sha_result);
let message: Message = Message::from_slice(&sha_result)?;
let signature = secp.sign(&message, &priv_k);
let sig: StdSignature = StdSignature::create(&signature.serialize_compact(), pub_k);
Ok(sig)
}
#[allow(dead_code)]
pub(crate) fn seed(&self, passwd: &str) -> Option<Seed> {
match &self.mnemonic {
Some(phrase) => Some(phrase.to_seed(passwd)),
None => None,
}
}
}
#[cfg(test)]
mod tst {
use super::*;
#[test]
pub fn tst_gen_mnemonic() -> Result<()> {
let s = Secp256k1::new();
PrivateKey::new(&s).and_then(|_| Ok(()))
}
#[test]
pub fn tst_words() -> Result<()> {
let str_1 = "notice oak worry limit wrap speak medal online prefer cluster roof addict wrist behave treat actual wasp year salad speed social layer crew genius";
let seed_1 = "a2ae8846397b55d266af35acdbb18ba1d005f7ddbdd4ca7a804df83352eaf373f274ba0dc8ac1b2b25f19dfcb7fa8b30a240d2c6039d88963defc2f626003b2f";
let s = Secp256k1::new();
let pk = PrivateKey::from_words(&s, str_1)?;
assert_eq!(hex::encode(pk.seed("").unwrap().as_bytes()), seed_1);
match pk.words() {
Some(words) => {
assert_eq!(words, str_1);
Ok(())
}
None => Err("missing phrase".into()),
}
}
#[test]
pub fn tst_root_priv_key() -> Result<()> {
let str_1 = "wonder caution square unveil april art add hover spend smile proud admit modify old copper throw crew happy nature luggage reopen exhibit ordinary napkin";
let secp = Secp256k1::new();
let pk = PrivateKey::from_words(&secp, str_1)?;
let root_key = "xprv9s21ZrQH143K2ep3BpYRRMjSqjLHZAPAzxfVVS3NBuGKBVtCrK3C8mE8TcmTjYnLm7SJxdLigDFWGAMnctKxc3p5QKNWXdprcFSQzGzQqTW";
assert_eq!(pk.root_private_key.to_string(), root_key);
let derived_key = "4804e2bdce36d413206ccf47cc4c64db2eff924e7cc9e90339fa7579d2bd9d5b";
assert_eq!(pk.private_key.private_key.key.to_string(), derived_key);
Ok(())
}
#[test]
pub fn tst_words_to_pub() -> Result<()> {
let str_1 = "wonder caution square unveil april art add hover spend smile proud admit modify old copper throw crew happy nature luggage reopen exhibit ordinary napkin";
let secp = Secp256k1::new();
let pk = PrivateKey::from_words(&secp, str_1)?;
let pub_k = pk.public_key(&secp);
let account = pub_k.account()?;
assert_eq!(&account, "terra1jnzv225hwl3uxc5wtnlgr8mwy6nlt0vztv3qqm");
assert_eq!(
&pub_k.TerraValOperPub()?,
"terravaloperpub1addwnpepqt8ha594svjn3nvfk4ggfn5n8xd3sm3cz6ztxyugwcuqzsuuhhfq5y7accr"
);
assert_eq!(
&pub_k.TerraPub()?,
"terrapub1addwnpepqt8ha594svjn3nvfk4ggfn5n8xd3sm3cz6ztxyugwcuqzsuuhhfq5nwzrf9"
);
Ok(())
}
#[test]
pub fn test_sign() -> Result<()> {
let str_1 = "island relax shop such yellow opinion find know caught erode blue dolphin behind coach tattoo light focus snake common size analyst imitate employ walnut";
let secp = Secp256k1::new();
let pk = PrivateKey::from_words(&secp, str_1)?;
let _pub_k = pk.public_key(&secp);
let to_sign = r#"{"account_number":"45","chain_id":"columbus-3-testnet","fee":{"amount":[{"amount":"698","denom":"uluna"}],"gas":"46467"},"memo":"","msgs":[{"type":"bank/MsgSend","value":{"amount":[{"amount":"100000000","denom":"uluna"}],"from_address":"terra1n3g37dsdlv7ryqftlkef8mhgqj4ny7p8v78lg7","to_address":"terra1wg2mlrxdmnnkkykgqg4znky86nyrtc45q336yv"}}],"sequence":"0"}"#;
let sig = pk.sign(&secp, to_sign)?;
assert_eq!(
sig.pub_key.value,
"AiMzHaA2bvnDXfHzkjMM+vkSE/p0ymBtAFKUnUtQAeXe"
);
assert_eq!(sig.signature, "FJKAXRxNB5ruqukhVqZf3S/muZEUmZD10fVmWycdVIxVWiCXXFsUy2VY2jINEOUGNwfrqEZsT2dUfAvWj8obLg==");
Ok(())
}
}