diff --git a/ethstore/src/json/hash.rs b/ethstore/src/json/hash.rs
index 2edc7b80b..0079b4f81 100644
--- a/ethstore/src/json/hash.rs
+++ b/ethstore/src/json/hash.rs
@@ -109,4 +109,3 @@ macro_rules! impl_hash {
 impl_hash!(H128, 16);
 impl_hash!(H160, 20);
 impl_hash!(H256, 32);
-impl_hash!(H768, 96);
diff --git a/ethstore/src/json/mod.rs.in b/ethstore/src/json/mod.rs.in
index 7272d7e2e..4f9fdbfe3 100644
--- a/ethstore/src/json/mod.rs.in
+++ b/ethstore/src/json/mod.rs.in
@@ -11,10 +11,10 @@ mod version;
 pub use self::cipher::{Cipher, CipherSer, CipherSerParams, Aes128Ctr};
 pub use self::crypto::Crypto;
 pub use self::error::Error;
-pub use self::hash::{H128, H160, H256, H768};
+pub use self::hash::{H128, H160, H256};
 pub use self::id::UUID;
 pub use self::kdf::{Kdf, KdfSer, Prf, Pbkdf2, Scrypt, KdfSerParams};
 pub use self::key_file::KeyFile;
-pub use self::presale::PresaleWallet;
+pub use self::presale::{PresaleWallet, Encseed};
 pub use self::version::Version;
 
diff --git a/ethstore/src/json/presale.rs b/ethstore/src/json/presale.rs
index cba50695f..77394fcb1 100644
--- a/ethstore/src/json/presale.rs
+++ b/ethstore/src/json/presale.rs
@@ -1,10 +1,34 @@
 use std::io::Read;
+use std::ops::Deref;
 use serde_json;
-use super::{H160, H768};
+use serde::{Deserialize, Deserializer, Error};
+use rustc_serialize::hex::FromHex;
+use super::{H160};
+
+#[derive(Debug, PartialEq)]
+pub struct Encseed(Vec<u8>);
+
+impl Deref for Encseed {
+	type Target = [u8];
+
+	fn deref(&self) -> &Self::Target {
+		&self.0
+	}
+}
+
+impl Deserialize for Encseed {
+	fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
+		where D: Deserializer
+	{
+		let s = try!(String::deserialize(deserializer));
+		let data = try!(s.from_hex().map_err(|e| Error::custom(format!("Invalid hex value {}", e))));
+		Ok(Encseed(data))
+	}
+}
 
 #[derive(Debug, PartialEq, Deserialize)]
 pub struct PresaleWallet {
-	pub encseed: H768,
+	pub encseed: Encseed,
 	#[serde(rename = "ethaddr")]
 	pub address: H160,
 }
@@ -19,7 +43,8 @@ impl PresaleWallet {
 mod tests {
 	use std::str::FromStr;
 	use serde_json;
-	use json::{PresaleWallet, H160, H768};
+	use rustc_serialize::hex::FromHex;
+	use json::{PresaleWallet, H160, Encseed};
 
 	#[test]
 	fn presale_wallet() {
@@ -32,7 +57,27 @@ mod tests {
 		} "#;
 
 		let expected = PresaleWallet {
-			encseed: H768::from_str("137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066").unwrap(),
+			encseed: Encseed("137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066".from_hex().unwrap()),
+			address: H160::from_str("ede84640d1a1d3e06902048e67aa7db8d52c2ce1").unwrap(),
+		};
+
+		let wallet: PresaleWallet = serde_json::from_str(json).unwrap();
+		assert_eq!(expected, wallet);
+	}
+
+	#[test]
+	fn long_presale_wallet() {
+		let json = r#"
+		{
+			"encseed":
+			"137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0d",
+			"ethaddr": "ede84640d1a1d3e06902048e67aa7db8d52c2ce1",
+			"email": "123@gmail.com",
+			"btcaddr": "1JvqEc6WLhg6GnyrLBe2ztPAU28KRfuseH"
+		} "#;
+
+		let expected = PresaleWallet {
+			encseed: Encseed("137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dedb3bc0a9ac6c79b9c426c5878ca2c9d06ff42a23cb648312fc32ba83649de0928e066137103c28caeebbcea5d7f95edb97a289ded151b72159137cb7b2671f394f54cff8c121589dcb373e267225547b3c71cbdb54f6e48ec85cd549f96cf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0dcf0d".from_hex().unwrap()),
 			address: H160::from_str("ede84640d1a1d3e06902048e67aa7db8d52c2ce1").unwrap(),
 		};