Update project structure and build process

libwallet/recoverycode.go

@@ -0,0 +1,40 @@
+package libwallet
+
+import (
+	"github.com/muun/libwallet/recoverycode"
+)
+
+// RecoveryCodeAlphabet contains all upper-case characters except for
+// numbers/letters that look alike.
+const RecoveryCodeAlphabet = recoverycode.Alphabet
+
+// GenerateRecoveryCode generates a new random recovery code using a
+// cryptographically secure random number generator.
+func GenerateRecoveryCode() string {
+	return recoverycode.Generate()
+}
+
+// RecoveryCodeToKey generates a challenge private key using the
+// recovery code as a seed.
+//
+// The salt parameter is only used for version 1 codes. It will be ignored
+// for version 2+ codes.
+func RecoveryCodeToKey(code, salt string) (*ChallengePrivateKey, error) {
+	privKey, err := recoverycode.ConvertToKey(code, salt)
+	if err != nil {
+		return nil, err
+	}
+	return &ChallengePrivateKey{key: privKey}, nil
+}
+
+// ValidateRecoveryCode returns an error if the recovery code is not valid
+// or nil otherwise.
+func ValidateRecoveryCode(code string) error {
+	return recoverycode.Validate(code)
+}
+
+// GetRecoveryCodeVersion returns the version for the recovery code given.
+// If no version can be recognized, it returns an error.
+func GetRecoveryCodeVersion(code string) (int, error) {
+	return recoverycode.Version(code)
+}