rust: make unset public (#302)

* make unset public
* delete file

rust/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "truelayer-signing"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Alex Butler <alex.butler@truelayer.com>"]
 edition = "2021"
 description = "Produce & verify TrueLayer API requests signatures"

rust/src/lib.rs

@@ -1,19 +1,20 @@
 //! Produce & verify TrueLayer API `Tl-Signature` request headers.
 mod base64;
-mod common;
 mod http;
 mod jws;
 mod openssl;
 mod sign;
 mod verify;
 
-use common::Unset;
 pub use http::Method;
 pub use jws::{JwsAlgorithm, JwsHeader, TlVersion};
 pub use sign::{CustomSigner, Signer, SignerBuilder};
 use verify::PublicKey;
 pub use verify::{CustomVerifier, Verifier, VerifierBuilder};
 
+/// A utility unit type to denote an item hasn't been set.
+pub struct Unset;
+
 /// Start building a request `Tl-Signature` header value using private key
 /// pem data & the key's `kid`.
 ///

rust/src/sign/mod.rs

@@ -4,7 +4,7 @@ mod signer_v1;
 use indexmap::IndexMap;
 use std::fmt;
 
-use crate::{base64::ToUrlSafeBase64, common::Unset, http::HeaderName, openssl, Error, Method};
+use crate::{base64::ToUrlSafeBase64, http::HeaderName, openssl, Error, Method, Unset};
 
 pub use self::custom_signer::CustomSigner;
 use self::signer_v1::SignerV1;

rust/src/verify/mod.rs

@@ -4,8 +4,8 @@ use anyhow::anyhow;
 use indexmap::{IndexMap, IndexSet};
 
 use crate::{
-    base64::DecodeUrlSafeBase64, common::Unset, http::HeaderName, jws::TlVersion, openssl, Error,
-    JwsHeader, Method,
+    base64::DecodeUrlSafeBase64, http::HeaderName, jws::TlVersion, openssl, Error, JwsHeader,
+    Method, Unset,
 };
 
 pub use self::custom_verifer::CustomVerifier;