diff --git a/Cargo.toml b/Cargo.toml
index 336225e..291182f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -69,7 +69,7 @@ pqcrypto-falcon = {version = "0.4.1", optional=true}
 # Signatures
 ed25519-dalek = {version = "2.2.0", features=["rand_core"], optional=true}
 schnorrkel = {version = "0.11.5", optional=true}
-ecdsa = {version = "0.16.9", features=["verify"], optional=true}
+ecdsa = {version = "0.16.9", optional=true}
 k256 = {version = "0.13.4", features=["ecdsa"], optional=true}
 ml-dsa = {version = "0.0.4", optional=true}
 ed448 = {version = "0.4.0", optional=true}
diff --git a/x59pk-fmt/src/derive.rs b/x59pk-fmt/src/derive.rs
new file mode 100644
index 0000000..5895efc
--- /dev/null
+++ b/x59pk-fmt/src/derive.rs
@@ -0,0 +1,22 @@
+//! # Derive From
+//! 
+//! ## Address Schemes
+//! 
+//! - [ ] Liberato-Address-Scheme (BLAKE2)
+//!     - [ ] Variable Digest
+//!     - [ ] Reserve Blake2s for 28-32 bytes
+//!     - [ ] Reserve Blake2b for 32-64 bytes
+//! - [ ] BLAKE3-Address-Scheme (BLAKE3)
+//! 
+//! ## Deriviation
+//! 
+//! - [ ] Public-Key
+//!     - [ ] Formats
+//!         - [ ] Bytes
+
+use fixedstr::str64;
+
+/// # DeriveFrom
+pub struct DeriveFromAPI {
+    _type: str64
+}
\ No newline at end of file
diff --git a/x59pk-fmt/src/lib.rs b/x59pk-fmt/src/lib.rs
index 9b3cacd..7cbed20 100644
--- a/x59pk-fmt/src/lib.rs
+++ b/x59pk-fmt/src/lib.rs
@@ -15,6 +15,7 @@
 //! - Hexadecimal (prefered)
 //! - Base32
 //! - Base58
+//! - Base64
 
 /// # Attribute
 /// 
@@ -36,4 +37,6 @@ pub mod label;
 
 pub mod errors;
 
-pub mod prelude;
\ No newline at end of file
+pub mod prelude;
+
+pub mod derive;
\ No newline at end of file