diff --git a/crates/by-chain/icepick-solana/src/lib.rs b/crates/by-chain/icepick-solana/src/lib.rs
index 1fbe94f..8f813fa 100644
--- a/crates/by-chain/icepick-solana/src/lib.rs
+++ b/crates/by-chain/icepick-solana/src/lib.rs
@@ -64,6 +64,18 @@ pub enum Operation {
 
 pub struct Solana;
 
+impl Solana {
+    fn keypair_from_bytes(given_bytes: [u8; 32]) -> solana_sdk::signer::keypair::Keypair {
+        use ed25519_dalek::{PublicKey, SecretKey};
+        let secret_key = SecretKey::from_bytes(&given_bytes).expect("key should be 32 bytes");
+        let mut bytes = [0u8; 64];
+        bytes[..32].clone_from_slice(&given_bytes);
+        bytes[32..].clone_from_slice(PublicKey::from(&secret_key).as_bytes());
+        solana_sdk::signer::keypair::Keypair::from_bytes(&bytes)
+            .expect("solana sdk should expect 64 bytes")
+    }
+}
+
 impl Module for Solana {
     type Error = Error;
 
@@ -178,17 +190,12 @@ impl Module for Solana {
                 }))
             }
             Operation::GetWalletAddress(_) => {
-                use ed25519_dalek::{PublicKey, SecretKey};
                 // NOTE: panics if doesn't exist
                 let key = request.derived_keys.unwrap()[0];
-                let secret_key = SecretKey::from_bytes(&key).unwrap();
-                let mut bytes = [0u8; 64];
-                bytes[..32].clone_from_slice(&key);
-                bytes[32..].clone_from_slice(PublicKey::from(&secret_key).as_bytes());
-                let pk = solana_sdk::signer::keypair::Keypair::from_bytes(&bytes).unwrap();
-                let pk = pk.pubkey();
+                let keypair = Self::keypair_from_bytes(key);
+                let pubkey = keypair.pubkey();
                 Ok(serde_json::json!({
-                    "blob": pk.to_string(),
+                    "blob": pubkey.to_string(),
                 }))
             }
             Operation::Transfer(Transfer {
@@ -253,11 +260,22 @@ impl Module for Solana {
             }
             Operation::Sign(_) => {
                 let blob = request.blob.expect("passed in instruction blob");
-                let _transaction: solana_sdk::transaction::Transaction =
+                let mut transaction: solana_sdk::transaction::Transaction =
                     serde_json::from_value(blob).expect("valid message blob");
-                let _keys = request.derived_keys.unwrap_or_default();
+                let keys = request
+                    .derived_keys
+                    .unwrap_or_default()
+                    .iter()
+                    .map(|k| Self::keypair_from_bytes(*k))
+                    .collect::<Vec<_>>();
+
+                let hash = transaction.message.recent_blockhash;
+                transaction
+                    .try_sign(&keys, hash)
+                    .expect("not enough keys provided");
+                use base64::prelude::*;
                 Ok(serde_json::json!({
-                    "blob": []
+                    "blob": transaction
                 }))
             }
         }