diff --git a/pallas-multiplexer/src/std.rs b/pallas-multiplexer/src/std.rs
index 5330f30e..11586055 100644
--- a/pallas-multiplexer/src/std.rs
+++ b/pallas-multiplexer/src/std.rs
@@ -10,7 +10,6 @@ use std::{
         Arc,
     },
     thread::{spawn, JoinHandle},
-    time::Duration,
 };
 
 pub type StdIngress = Receiver<Payload>;
diff --git a/pallas-traverse/src/era.rs b/pallas-traverse/src/era.rs
index b83af9cb..0de8ee08 100644
--- a/pallas-traverse/src/era.rs
+++ b/pallas-traverse/src/era.rs
@@ -29,7 +29,7 @@ impl TryFrom<u16> for Era {
             4 => Ok(Era::Mary),
             5 => Ok(Era::Alonzo),
             6 => Ok(Era::Babbage),
-            x => Err(crate::Error::UnkownEra(x)),
+            x => Err(crate::Error::UnknownEra(x)),
         }
     }
 }
diff --git a/pallas-traverse/src/header.rs b/pallas-traverse/src/header.rs
index e94329eb..7a6f6767 100644
--- a/pallas-traverse/src/header.rs
+++ b/pallas-traverse/src/header.rs
@@ -1,5 +1,5 @@
 use pallas_codec::minicbor;
-use pallas_crypto::hash::Hash;
+use pallas_crypto::hash::{Hash, Hasher};
 use pallas_primitives::ToHash;
 
 use crate::{Error, MultiEraHeader};
@@ -45,4 +45,34 @@ impl<'b> MultiEraHeader<'b> {
             MultiEraHeader::Byron(x) => x.to_hash(),
         }
     }
-}
+
+    pub fn leader_vrf_output(&self) -> Result<Vec<u8>, Error> {
+        match self {
+            MultiEraHeader::EpochBoundary(_) => Err(Error::InvalidEra(0)),
+            MultiEraHeader::AlonzoCompatible(x) => {
+                Ok(x.header_body.leader_vrf.0.to_vec())
+            }
+            MultiEraHeader::Babbage(x) => {
+                let mut leader_tagged_vrf: Vec<u8> = vec![0x4C_u8]; /* "L" */
+                leader_tagged_vrf.extend(&*x.header_body.vrf_result.0);
+                Ok(Hasher::<256>::hash(&leader_tagged_vrf).to_vec())
+            }
+            MultiEraHeader::Byron(_) => Err(Error::InvalidEra(1)),
+        }
+    }
+
+    pub fn nonce_vrf_output(&self) -> Result<Vec<u8>, Error> {
+        match self {
+            MultiEraHeader::EpochBoundary(_) => Err(Error::InvalidEra(0)),
+            MultiEraHeader::AlonzoCompatible(x) => {
+                Ok(x.header_body.nonce_vrf.0.to_vec())
+            }
+            MultiEraHeader::Babbage(x) => {
+                let mut nonce_tagged_vrf: Vec<u8> = vec![0x4E_u8]; /* "N" */
+                nonce_tagged_vrf.extend(&*x.header_body.vrf_result.0);
+                Ok(Hasher::<256>::hash(&nonce_tagged_vrf).to_vec())
+            }
+            MultiEraHeader::Byron(_) => Err(Error::InvalidEra(1)),
+        }
+    }
+}
\ No newline at end of file
diff --git a/pallas-traverse/src/lib.rs b/pallas-traverse/src/lib.rs
index d6947da9..81b61796 100644
--- a/pallas-traverse/src/lib.rs
+++ b/pallas-traverse/src/lib.rs
@@ -97,7 +97,10 @@ pub enum Error {
     UnknownCbor(String),
 
     #[error("Unknown era tag: {0}")]
-    UnkownEra(u16),
+    UnknownEra(u16),
+
+    #[error("Invalid era for request: {0}")]
+    InvalidEra(u16),
 }
 
 impl Error {