Monorepo scaffolding (#16)

* Change scaffolding

* Fix gh action

noah/common.go

@@ -0,0 +1,114 @@
+package main
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"syscall"
+
+	"github.com/ark-network/ark/common"
+	"github.com/decred/dcrd/dcrec/secp256k1/v4"
+	"golang.org/x/term"
+)
+
+func hashPassword(password []byte) []byte {
+	hash := sha256.Sum256(password)
+	return hash[:]
+}
+
+func verifyPassword(password []byte) error {
+	state, err := getState()
+	if err != nil {
+		return err
+	}
+
+	passwordHashString, ok := state["password_hash"]
+	if !ok {
+		return fmt.Errorf("password hash not found")
+	}
+
+	passwordHash, err := hex.DecodeString(passwordHashString)
+	if err != nil {
+		return err
+	}
+
+	currentPassHash := hashPassword(password)
+
+	if !bytes.Equal(passwordHash, currentPassHash) {
+		return fmt.Errorf("invalid password")
+	}
+
+	return nil
+}
+
+func readPassword() ([]byte, error) {
+	fmt.Print("password: ")
+	passwordInput, err := term.ReadPassword(int(syscall.Stdin))
+	fmt.Println() // new line
+	if err != nil {
+		return nil, err
+	}
+
+	err = verifyPassword(passwordInput)
+	if err != nil {
+		return nil, err
+	}
+
+	return passwordInput, nil
+}
+
+func privateKeyFromPassword() (*secp256k1.PrivateKey, error) {
+	state, err := getState()
+	if err != nil {
+		return nil, err
+	}
+
+	encryptedPrivateKeyString, ok := state["encrypted_private_key"]
+	if !ok {
+		return nil, fmt.Errorf("encrypted private key not found")
+	}
+
+	encryptedPrivateKey, err := hex.DecodeString(encryptedPrivateKeyString)
+	if err != nil {
+		return nil, err
+	}
+
+	password, err := readPassword()
+	if err != nil {
+		return nil, err
+	}
+
+	cypher := NewAES128Cypher()
+	privateKeyBytes, err := cypher.Decrypt(encryptedPrivateKey, password)
+	if err != nil {
+		return nil, err
+	}
+
+	privateKey := secp256k1.PrivKeyFromBytes(privateKeyBytes)
+	return privateKey, nil
+}
+
+func getServiceProviderPublicKey() (*secp256k1.PublicKey, error) {
+	state, err := getState()
+	if err != nil {
+		return nil, err
+	}
+
+	arkURL, ok := state["ark_url"]
+	if !ok {
+		return nil, fmt.Errorf("ark url not found")
+	}
+
+	arkPubKey, _, err := common.DecodeUrl(arkURL)
+	if err != nil {
+		return nil, err
+	}
+
+	_, publicKey, err := common.DecodePubKey(arkPubKey)
+	if err != nil {
+		return nil, err
+	}
+
+	return publicKey, nil
+}