diff --git a/bencher/src/main.rs b/bencher/src/main.rs
index 75fcde15..0e43ce07 100644
--- a/bencher/src/main.rs
+++ b/bencher/src/main.rs
@@ -41,10 +41,10 @@ impl Benchmark {
 }
 
 fn decimal_mark(s: String) -> String {
-    let bytes: Vec<_> = s.bytes().rev().collect();
-    let chunks: Vec<_> = bytes.chunks(3).map(|chunk| str::from_utf8(chunk).unwrap()).collect();
-    let result: Vec<_> = chunks.join(",").bytes().rev().collect();
-    String::from_utf8(result).unwrap()
+	let bytes: Vec<_> = s.bytes().rev().collect();
+	let chunks: Vec<_> = bytes.chunks(3).map(|chunk| str::from_utf8(chunk).unwrap()).collect();
+	let result: Vec<_> = chunks.join(",").bytes().rev().collect();
+	String::from_utf8(result).unwrap()
 }
 
 
@@ -65,9 +65,9 @@ fn run_benchmark<F>(name: &str, f: F) where F: FnOnce(&mut Benchmark) {
 }
 
 macro_rules! benchmark {
-    ($t:expr) => {
-    	run_benchmark(stringify!($t), $t);
-    };
+	($t:expr) => {
+		run_benchmark(stringify!($t), $t);
+	};
 }
 
 fn main() {
diff --git a/crypto/src/lib.rs b/crypto/src/lib.rs
index ef8f7a4d..13f765c6 100644
--- a/crypto/src/lib.rs
+++ b/crypto/src/lib.rs
@@ -285,81 +285,81 @@ mod tests {
 	}
 
 
-    #[test]
-    fn half_empty_compress() {
-        let vectors = vec![
-            "da5698be17b9b46962335799779fbeca8ce5d491c0d26243bafef9ea1837a9d8",
-            "dc766fab492ccf3d1e49d4f374b5235fa56506aac2224d39f943fcd49202974c",
-            "3f0a406181105968fdaee30679e3273c66b72bf9a7f5debbf3b5a0a26e359f92",
-            "26b0052694fc42fdff93e6fb5a71d38c3dd7dc5b6ad710eb048c660233137fab",
-            "0109ecc0722659ff83450b8f7b8846e67b2859f33c30d9b7acd5bf39cae54e31",
-            "3f909b8ce3d7ffd8a5b30908f605a03b0db85169558ddc1da7bbbcc9b09fd325",
-            "40460fa6bc692a06f47521a6725a547c028a6a240d8409f165e63cb54da2d23f",
-            "8c085674249b43da1b9a31a0e820e81e75f342807b03b6b9e64983217bc2b38e",
-            "a083450c1ba2a3a7be76fad9d13bc37be4bf83bd3e59fc375a36ba62dc620298",
-            "1ddddabc2caa2de9eff9e18c8c5a39406d7936e889bc16cfabb144f5c0022682",
-            "c22d8f0b5e4056e5f318ba22091cc07db5694fbeb5e87ef0d7e2c57ca352359e",
-            "89a434ae1febd7687eceea21d07f20a2512449d08ce2eee55871cdb9d46c1233",
-            "7333dbffbd11f09247a2b33a013ec4c4342029d851e22ba485d4461851370c15",
-            "5dad844ab9466b70f745137195ca221b48f346abd145fb5efc23a8b4ba508022",
-            "507e0dae81cbfbe457fd370ef1ca4201c2b6401083ddab440e4a038dc1e358c4",
-            "bdcdb3293188c9807d808267018684cfece07ac35a42c00f2c79b4003825305d",
-            "bab5800972a16c2c22530c66066d0a5867e987bed21a6d5a450b683cf1cfd709",
-            "11aa0b4ad29b13b057a31619d6500d636cd735cdd07d811ea265ec4bcbbbd058",
-            "5145b1b055c2df02b95675e3797b91de1b846d25003c0a803d08900728f2cd6a",
-            "0323f2850bf3444f4b4c5c09a6057ec7169190f45acb9e46984ab3dfcec4f06a",
-            "671546e26b1da1af754531e26d8a6a51073a57ddd72dc472efb43fcb257cffff",
-            "bb23a9bba56de57cb284b0d2b01c642cf79c9a5563f0067a21292412145bd78a",
-            "f30cc836b9f71b4e7ee3c72b1fd253268af9a27e9d7291a23d02821b21ddfd16",
-            "58a2753dade103cecbcda50b5ebfce31e12d41d5841dcc95620f7b3d50a1b9a1",
-            "925e6d474a5d8d3004f29da0dd78d30ae3824ce79dfe4934bb29ec3afaf3d521",
-            "08f279618616bcdd4eadc9c7a9062691a59b43b07e2c1e237f17bd189cd6a8fe",
-            "c92b32db42f42e2bf0a59df9055be5c669d3242df45357659b75ae2c27a76f50",
-            "c0db2a74998c50eb7ba6534f6d410efc27c4bb88acb0222c7906ea28a327b511",
-            "d7c612c817793191a1e68652121876d6b3bde40f4fa52bc314145ce6e5cdd259",
-            "b22370106c67a17209f6130bc09f735d83aa2c04fc4fe72ea5d80b216723e7ce",
-            "9f67d5f664664c901940eee3d02dd5b3e4b92e7b42820c42fc5159e91b41172a",
-            "ac58cd1388fec290d398f1944b564449a63c815880566bd1d189f7839e3b0c8c",
-            "5698eae7c8515ed05a70339bdf7c1028e7acca13a4fa97d9538f01ac8d889ae3",
-            "2d4995770a76fb93314ca74b3524ea1db5688ad0a76183ea17204a8f024a9f3b",
-            "5e8992c1b072c16e9e28a85358fb5fb6901a81587766dadb7aa0b973ded2f264",
-            "e95db71e1f7291ba5499461bc715203e29b84bfa4283e3bb7f470a15d0e1584e",
-            "41f078bd1824c8a4b71964f394aa595084d8eb17b97a3630433af70d10e0eff6",
-            "a1913fe6b20132312f8c1f00ddd63cec7a03f5f1d7d83492fa284c0b5d6320b0",
-            "ba9440c4dbfcf55ceb605a5b8990fc11f8ef22870d8d12e130f986491eae84b3",
-            "49db2d5e22b8015cae4810d75e54014c5469862738e161ec96ec20218718828a",
-            "d4851fb8431edfbb8b1e85ada6895967c2dac87df344992a05faf1ecf836eec9",
-            "e4ab9f4470f00cd196d47c75c82e7adaf06fe17e042e3953d93bb5d56d8cd8fb",
-            "7e4320434849ecb357f1afaaba21a54400ef2d11cff83b937d87fdafa49f8199",
-            "020adc98d96cfbbcca15fc3aa03760ed286686c35b5d92c7cb64a999b394a854",
-            "3a26b29fe1acfdd6c6a151bcc3dbcb95a10ebe2f0553f80779569b67b7244e77",
-            "ec2d0986e6a0ddf43897b2d4f23bb034f538ffe00827f310dc4963f3267f0bfb",
-            "d48073f8819f81f0358e3fc35a047cc74082ae1cb7ee22fb609c01649342d0e6",
-            "ad8037601793f172441ecb00dc138d9fc5957125ecc382ec65e36f817dc799fb",
-            "ca500a5441f36f4df673d6b8ed075d36dae2c7e6481428c70a5a76b7a9bebce8",
-            "422b6ddd473231dc4d56fe913444ccd56f7c61f747ba57ca946d5fef72d840a0",
-            "ab41f4ecb7d7089615800e19fcc53b8379ed05ee35c82567095583fd90ff3035",
-            "bbf7618248354ceb1bc1fc9dbc42c426a4e2c1e0d443c5683a9256c62ecdc26f",
-            "e50ae71479fc8ec569192a13072e011afc249f471af09500ea39f75d0af856bf",
-            "e74c0b9220147db2d50a3b58d413775d16c984690be7d90f0bc43d99dba1b689",
-            "29324a0a48d11657a51ba08b004879bfcfc66a1acb7ce36dfe478d2655484b48",
-            "88952e3d0ac06cb16b665201122249659a22325e01c870f49e29da6b1757e082",
-            "cdf879f2435b95af042a3bf7b850f7819246c805285803d67ffbf4f295bed004",
-            "e005e324200b4f428c62bc3331e695c373607cd0faa9790341fa3ba1ed228bc5",
-            "354447727aa9a53dd8345b6b6c693443e56ef4aeba13c410179fc8589e7733d5",
-            "da52dda91f2829c15c0e58d29a95360b86ab30cf0cac8101832a29f38c3185f1",
-            "c7da7814e228e1144411d78b536092fe920bcdfcc36cf19d1259047b267d58b5",
-            "aba1f68b6c2b4db6cc06a7340e12313c4b4a4ea6deb17deb3e1e66cd8eacf32b",
-            "c160ae4f64ab764d864a52ad5e33126c4b5ce105a47deedd75bc70199a5247ef",
-            "eadf23fc99d514dd8ea204d223e98da988831f9b5d1940274ca520b7fb173d8a",
-            "5b8e14facac8a7c7a3bfee8bae71f2f7793d3ad5fe3383f93ab6061f2a11bb02"
-        ];
+	#[test]
+	fn half_empty_compress() {
+		let vectors = vec![
+			"da5698be17b9b46962335799779fbeca8ce5d491c0d26243bafef9ea1837a9d8",
+			"dc766fab492ccf3d1e49d4f374b5235fa56506aac2224d39f943fcd49202974c",
+			"3f0a406181105968fdaee30679e3273c66b72bf9a7f5debbf3b5a0a26e359f92",
+			"26b0052694fc42fdff93e6fb5a71d38c3dd7dc5b6ad710eb048c660233137fab",
+			"0109ecc0722659ff83450b8f7b8846e67b2859f33c30d9b7acd5bf39cae54e31",
+			"3f909b8ce3d7ffd8a5b30908f605a03b0db85169558ddc1da7bbbcc9b09fd325",
+			"40460fa6bc692a06f47521a6725a547c028a6a240d8409f165e63cb54da2d23f",
+			"8c085674249b43da1b9a31a0e820e81e75f342807b03b6b9e64983217bc2b38e",
+			"a083450c1ba2a3a7be76fad9d13bc37be4bf83bd3e59fc375a36ba62dc620298",
+			"1ddddabc2caa2de9eff9e18c8c5a39406d7936e889bc16cfabb144f5c0022682",
+			"c22d8f0b5e4056e5f318ba22091cc07db5694fbeb5e87ef0d7e2c57ca352359e",
+			"89a434ae1febd7687eceea21d07f20a2512449d08ce2eee55871cdb9d46c1233",
+			"7333dbffbd11f09247a2b33a013ec4c4342029d851e22ba485d4461851370c15",
+			"5dad844ab9466b70f745137195ca221b48f346abd145fb5efc23a8b4ba508022",
+			"507e0dae81cbfbe457fd370ef1ca4201c2b6401083ddab440e4a038dc1e358c4",
+			"bdcdb3293188c9807d808267018684cfece07ac35a42c00f2c79b4003825305d",
+			"bab5800972a16c2c22530c66066d0a5867e987bed21a6d5a450b683cf1cfd709",
+			"11aa0b4ad29b13b057a31619d6500d636cd735cdd07d811ea265ec4bcbbbd058",
+			"5145b1b055c2df02b95675e3797b91de1b846d25003c0a803d08900728f2cd6a",
+			"0323f2850bf3444f4b4c5c09a6057ec7169190f45acb9e46984ab3dfcec4f06a",
+			"671546e26b1da1af754531e26d8a6a51073a57ddd72dc472efb43fcb257cffff",
+			"bb23a9bba56de57cb284b0d2b01c642cf79c9a5563f0067a21292412145bd78a",
+			"f30cc836b9f71b4e7ee3c72b1fd253268af9a27e9d7291a23d02821b21ddfd16",
+			"58a2753dade103cecbcda50b5ebfce31e12d41d5841dcc95620f7b3d50a1b9a1",
+			"925e6d474a5d8d3004f29da0dd78d30ae3824ce79dfe4934bb29ec3afaf3d521",
+			"08f279618616bcdd4eadc9c7a9062691a59b43b07e2c1e237f17bd189cd6a8fe",
+			"c92b32db42f42e2bf0a59df9055be5c669d3242df45357659b75ae2c27a76f50",
+			"c0db2a74998c50eb7ba6534f6d410efc27c4bb88acb0222c7906ea28a327b511",
+			"d7c612c817793191a1e68652121876d6b3bde40f4fa52bc314145ce6e5cdd259",
+			"b22370106c67a17209f6130bc09f735d83aa2c04fc4fe72ea5d80b216723e7ce",
+			"9f67d5f664664c901940eee3d02dd5b3e4b92e7b42820c42fc5159e91b41172a",
+			"ac58cd1388fec290d398f1944b564449a63c815880566bd1d189f7839e3b0c8c",
+			"5698eae7c8515ed05a70339bdf7c1028e7acca13a4fa97d9538f01ac8d889ae3",
+			"2d4995770a76fb93314ca74b3524ea1db5688ad0a76183ea17204a8f024a9f3b",
+			"5e8992c1b072c16e9e28a85358fb5fb6901a81587766dadb7aa0b973ded2f264",
+			"e95db71e1f7291ba5499461bc715203e29b84bfa4283e3bb7f470a15d0e1584e",
+			"41f078bd1824c8a4b71964f394aa595084d8eb17b97a3630433af70d10e0eff6",
+			"a1913fe6b20132312f8c1f00ddd63cec7a03f5f1d7d83492fa284c0b5d6320b0",
+			"ba9440c4dbfcf55ceb605a5b8990fc11f8ef22870d8d12e130f986491eae84b3",
+			"49db2d5e22b8015cae4810d75e54014c5469862738e161ec96ec20218718828a",
+			"d4851fb8431edfbb8b1e85ada6895967c2dac87df344992a05faf1ecf836eec9",
+			"e4ab9f4470f00cd196d47c75c82e7adaf06fe17e042e3953d93bb5d56d8cd8fb",
+			"7e4320434849ecb357f1afaaba21a54400ef2d11cff83b937d87fdafa49f8199",
+			"020adc98d96cfbbcca15fc3aa03760ed286686c35b5d92c7cb64a999b394a854",
+			"3a26b29fe1acfdd6c6a151bcc3dbcb95a10ebe2f0553f80779569b67b7244e77",
+			"ec2d0986e6a0ddf43897b2d4f23bb034f538ffe00827f310dc4963f3267f0bfb",
+			"d48073f8819f81f0358e3fc35a047cc74082ae1cb7ee22fb609c01649342d0e6",
+			"ad8037601793f172441ecb00dc138d9fc5957125ecc382ec65e36f817dc799fb",
+			"ca500a5441f36f4df673d6b8ed075d36dae2c7e6481428c70a5a76b7a9bebce8",
+			"422b6ddd473231dc4d56fe913444ccd56f7c61f747ba57ca946d5fef72d840a0",
+			"ab41f4ecb7d7089615800e19fcc53b8379ed05ee35c82567095583fd90ff3035",
+			"bbf7618248354ceb1bc1fc9dbc42c426a4e2c1e0d443c5683a9256c62ecdc26f",
+			"e50ae71479fc8ec569192a13072e011afc249f471af09500ea39f75d0af856bf",
+			"e74c0b9220147db2d50a3b58d413775d16c984690be7d90f0bc43d99dba1b689",
+			"29324a0a48d11657a51ba08b004879bfcfc66a1acb7ce36dfe478d2655484b48",
+			"88952e3d0ac06cb16b665201122249659a22325e01c870f49e29da6b1757e082",
+			"cdf879f2435b95af042a3bf7b850f7819246c805285803d67ffbf4f295bed004",
+			"e005e324200b4f428c62bc3331e695c373607cd0faa9790341fa3ba1ed228bc5",
+			"354447727aa9a53dd8345b6b6c693443e56ef4aeba13c410179fc8589e7733d5",
+			"da52dda91f2829c15c0e58d29a95360b86ab30cf0cac8101832a29f38c3185f1",
+			"c7da7814e228e1144411d78b536092fe920bcdfcc36cf19d1259047b267d58b5",
+			"aba1f68b6c2b4db6cc06a7340e12313c4b4a4ea6deb17deb3e1e66cd8eacf32b",
+			"c160ae4f64ab764d864a52ad5e33126c4b5ce105a47deedd75bc70199a5247ef",
+			"eadf23fc99d514dd8ea204d223e98da988831f9b5d1940274ca520b7fb173d8a",
+			"5b8e14facac8a7c7a3bfee8bae71f2f7793d3ad5fe3383f93ab6061f2a11bb02"
+		];
 
-        let mut next = H256::from(&[0u8; 32][..]);
+		let mut next = H256::from(&[0u8; 32][..]);
 
-        for idx in 0..vectors.len() {
-            next = sha256_compress(&next[..], &next[..]);
-            assert_eq!(next, H256::from(vectors[idx]));
-        }
-    }
+		for idx in 0..vectors.len() {
+			next = sha256_compress(&next[..], &next[..]);
+			assert_eq!(next, H256::from(vectors[idx]));
+		}
+	}
 }
diff --git a/db/src/kv/diskdb.rs b/db/src/kv/diskdb.rs
index 947eb459..2bca1237 100644
--- a/db/src/kv/diskdb.rs
+++ b/db/src/kv/diskdb.rs
@@ -104,7 +104,7 @@ pub struct DatabaseIterator {
 impl<'a> Iterator for DatabaseIterator {
 	type Item = (Box<[u8]>, Box<[u8]>);
 
-    fn next(&mut self) -> Option<Self::Item> {
+	fn next(&mut self) -> Option<Self::Item> {
 		self.iter.next()
 	}
 }
diff --git a/rpc/src/v1/impls/blockchain.rs b/rpc/src/v1/impls/blockchain.rs
index 24d21d62..7202679f 100644
--- a/rpc/src/v1/impls/blockchain.rs
+++ b/rpc/src/v1/impls/blockchain.rs
@@ -178,9 +178,9 @@ impl<T> BlockChain for BlockChainClient<T> where T: BlockChainClientCoreApi {
 		Ok(self.core.best_block_hash().reversed().into())
 	}
 
-    fn block_count(&self) -> Result<u32, Error> {
-        Ok(self.core.block_count())
-    }
+	fn block_count(&self) -> Result<u32, Error> {
+		Ok(self.core.block_count())
+	}
 
 	fn block_hash(&self, height: u32) -> Result<H256, Error> {
 		self.core.block_hash(height)
diff --git a/script/src/opcode.rs b/script/src/opcode.rs
index b5c1dcd3..0538a1db 100644
--- a/script/src/opcode.rs
+++ b/script/src/opcode.rs
@@ -7,8 +7,8 @@ use flags::VerificationFlags;
 #[allow(non_camel_case_types)]
 #[derive(Debug, PartialEq, Eq, Clone, Copy, PartialOrd, Ord)]
 pub enum Opcode {
-    // push value
-    OP_0 = 0x00,
+	// push value
+	OP_0 = 0x00,
 	OP_PUSHBYTES_1 = 0x01,
 	OP_PUSHBYTES_2 = 0x02,
 	OP_PUSHBYTES_3 = 0x03,
@@ -84,27 +84,27 @@ pub enum Opcode {
 	OP_PUSHBYTES_73 = 0x49,
 	OP_PUSHBYTES_74 = 0x4a,
 	OP_PUSHBYTES_75 = 0x4b,
-    OP_PUSHDATA1 = 0x4c,
-    OP_PUSHDATA2 = 0x4d,
-    OP_PUSHDATA4 = 0x4e,
-    OP_1NEGATE = 0x4f,
-    OP_RESERVED = 0x50,
-    OP_1 = 0x51,
-    OP_2 = 0x52,
-    OP_3 = 0x53,
-    OP_4 = 0x54,
-    OP_5 = 0x55,
-    OP_6 = 0x56,
-    OP_7 = 0x57,
-    OP_8 = 0x58,
-    OP_9 = 0x59,
-    OP_10 = 0x5a,
-    OP_11 = 0x5b,
-    OP_12 = 0x5c,
-    OP_13 = 0x5d,
-    OP_14 = 0x5e,
-    OP_15 = 0x5f,
-    OP_16 = 0x60,
+	OP_PUSHDATA1 = 0x4c,
+	OP_PUSHDATA2 = 0x4d,
+	OP_PUSHDATA4 = 0x4e,
+	OP_1NEGATE = 0x4f,
+	OP_RESERVED = 0x50,
+	OP_1 = 0x51,
+	OP_2 = 0x52,
+	OP_3 = 0x53,
+	OP_4 = 0x54,
+	OP_5 = 0x55,
+	OP_6 = 0x56,
+	OP_7 = 0x57,
+	OP_8 = 0x58,
+	OP_9 = 0x59,
+	OP_10 = 0x5a,
+	OP_11 = 0x5b,
+	OP_12 = 0x5c,
+	OP_13 = 0x5d,
+	OP_14 = 0x5e,
+	OP_15 = 0x5f,
+	OP_16 = 0x60,
 
 	// control
 	OP_NOP = 0x61,
diff --git a/storage/src/nullifier.rs b/storage/src/nullifier.rs
index 7dc0123b..fda25e66 100644
--- a/storage/src/nullifier.rs
+++ b/storage/src/nullifier.rs
@@ -4,40 +4,40 @@ use EpochTag;
 /// Nullifier.
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Nullifier {
-    tag: EpochTag,
-    hash: H256,
+	tag: EpochTag,
+	hash: H256,
 }
 
 /// Trait to query existing nullifier.
 pub trait NullifierTracker : Sync {
-    fn contains_nullifier(&self, nullifier: Nullifier) -> bool;
+	fn contains_nullifier(&self, nullifier: Nullifier) -> bool;
 }
 
 impl Nullifier {
-    /// New nullifer.
-    pub fn new(tag: EpochTag, hash: H256) -> Self {
-        Nullifier {
-            tag: tag,
-            hash: hash,
-        }
-    }
+	/// New nullifer.
+	pub fn new(tag: EpochTag, hash: H256) -> Self {
+		Nullifier {
+			tag: tag,
+			hash: hash,
+		}
+	}
 
-    /// Nullifer tag
-    pub fn tag(&self) -> EpochTag {
-        self.tag
-    }
+	/// Nullifer tag
+	pub fn tag(&self) -> EpochTag {
+		self.tag
+	}
 
-    /// Nullifer hash
-    pub fn hash(&self) -> &H256 {
-        &self.hash
-    }
+	/// Nullifer hash
+	pub fn hash(&self) -> &H256 {
+		&self.hash
+	}
 }
 
 impl From<(EpochTag, H256)> for Nullifier {
-    fn from(tuple: (EpochTag, H256)) -> Self {
-        Nullifier {
-            tag: tuple.0,
-            hash: tuple.1,
-        }
-    }
+	fn from(tuple: (EpochTag, H256)) -> Self {
+		Nullifier {
+			tag: tuple.0,
+			hash: tuple.1,
+		}
+	}
 }
\ No newline at end of file