diff --git a/Cargo.lock b/Cargo.lock
index cfc396be..bfe04483 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,19 +1,21 @@
 [root]
-name = "verification"
+name = "pbtc"
 version = "0.1.0"
 dependencies = [
- "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "app_dirs 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "chain 0.1.0",
+ "clap 2.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "db 0.1.0",
- "ethcore-devtools 1.3.0",
- "linked-hash-map 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "import 0.1.0",
+ "keys 0.1.0",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "primitives 0.1.0",
+ "message 0.1.0",
+ "miner 0.1.0",
+ "p2p 0.1.0",
  "script 0.1.0",
- "serialization 0.1.0",
- "test-data 0.1.0",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sync 0.1.0",
+ "verification 0.1.0",
 ]
 
 [[package]]
@@ -104,13 +106,13 @@ dependencies = [
  "bitcrypto 0.1.0",
  "heapsize 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "primitives 0.1.0",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "serialization 0.1.0",
 ]
 
 [[package]]
 name = "clap"
-version = "2.17.1"
+version = "2.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -135,7 +137,7 @@ version = "0.14.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -199,7 +201,7 @@ dependencies = [
  "gcc 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -270,15 +272,15 @@ dependencies = [
  "base58 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitcrypto 0.1.0",
  "eth-secp256k1 0.5.6 (git+https://github.com/ethcore/rust-secp256k1)",
- "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "primitives 0.1.0",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "lazy_static"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -470,32 +472,12 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "pbtc"
-version = "0.1.0"
-dependencies = [
- "app_dirs 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "chain 0.1.0",
- "clap 2.17.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "db 0.1.0",
- "env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "import 0.1.0",
- "keys 0.1.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "message 0.1.0",
- "miner 0.1.0",
- "p2p 0.1.0",
- "script 0.1.0",
- "sync 0.1.0",
- "verification 0.1.0",
-]
-
 [[package]]
 name = "primitives"
 version = "0.1.0"
 dependencies = [
  "heapsize 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -565,13 +547,13 @@ dependencies = [
  "gcc 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rustc-serialize"
-version = "0.3.19"
+version = "0.3.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -735,6 +717,24 @@ name = "vec_map"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "verification"
+version = "0.1.0"
+dependencies = [
+ "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chain 0.1.0",
+ "db 0.1.0",
+ "ethcore-devtools 1.3.0",
+ "linked-hash-map 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "primitives 0.1.0",
+ "script 0.1.0",
+ "serialization 0.1.0",
+ "test-data 0.1.0",
+ "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "void"
 version = "1.0.2"
@@ -781,7 +781,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "aad18937a628ec6abcd26d1489012cc0e18c21798210f491af69ded9b881106d"
 "checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
 "checksum cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de1e760d7b6535af4241fca8bd8adf68e2e7edacc6b29f5d399050c5e48cf88c"
-"checksum clap 2.17.1 (registry+https://github.com/rust-lang/crates.io-index)" = "27dac76762fb56019b04aed3ccb43a770a18f80f9c2eb62ee1a18d9fb4ea2430"
+"checksum clap 2.18.0 (registry+https://github.com/rust-lang/crates.io-index)" = "40046b8a004bf3ba43b9078bf4b9b6d1708406a234848f925dbd7160a374c8a8"
 "checksum crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "0c5ea215664ca264da8a9d9c3be80d2eaf30923c259d03e870388eb927508f97"
 "checksum csv 0.14.7 (registry+https://github.com/rust-lang/crates.io-index)" = "266c1815d7ca63a5bd86284043faf91e8c95e943e55ce05dc0ae08e952de18bc"
 "checksum deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1614659040e711785ed8ea24219140654da1729f3ec8a47a9719d041112fe7bf"
@@ -794,7 +794,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum gcc 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)" = "553f11439bdefe755bf366b264820f1da70f3aaf3924e594b886beb9c831bcf5"
 "checksum heapsize 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "8c80e194758495a9109566134dc06e42ea0423987d6ceca016edaa90381b3549"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "49247ec2a285bb3dcb23cbd9c35193c025e7251bfce77c1d5da97e6362dffe7f"
+"checksum lazy_static 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6abe0ee2e758cd6bc8a2cd56726359007748fbf4128da998b65d0b70f881e19b"
 "checksum lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce12306c4739d86ee97c23139f3a34ddf0387bbf181bc7929d287025a8c3ef6b"
 "checksum libc 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)" = "044d1360593a78f5c8e5e710beccdc24ab71d1f01bc19a29bcacdba22e8475d8"
 "checksum linked-hash-map 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6d262045c5b87c0861b3f004610afd0e2c851e2908d08b6c870cbb9d5f494ecd"
@@ -820,7 +820,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rocksdb 0.4.5 (git+https://github.com/ethcore/rust-rocksdb)" = "<none>"
 "checksum rocksdb-sys 0.3.0 (git+https://github.com/ethcore/rust-rocksdb)" = "<none>"
 "checksum rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)" = "f76d05d3993fd5f4af9434e8e436db163a12a9d40e1a58a726f27a01dfd12a2a"
-"checksum rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)" = "6159e4e6e559c81bd706afe9c8fd68f547d3e851ce12e76b1de7914bab61691b"
+"checksum rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)" = "bff9fc1c79f2dec76b253273d07682e94a978bd8f132ded071188122b2af9818"
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum scoped-tls 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f417c22df063e9450888a7561788e9bd46d3bb3c1466435b4eccb903807f147d"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
diff --git a/tools/graph.dot b/tools/graph.dot
index f786e892..8677ceb6 100644
--- a/tools/graph.dot
+++ b/tools/graph.dot
@@ -121,6 +121,7 @@ digraph dependencies {
 	N3 -> N46[label="",style=dashed];
 	N3 -> N47[label="",style=dashed];
 	N4 -> N2[label="",style=dashed];
+	N4 -> N8[label="",style=dashed];
 	N4 -> N30[label="",style=dashed];
 	N4 -> N32[label="",style=dashed];
 	N4 -> N36[label="",style=dashed];
@@ -181,6 +182,7 @@ digraph dependencies {
 	N13 -> N14[label="",style=dashed];
 	N13 -> N16[label="",style=dashed];
 	N13 -> N32[label="",style=dashed];
+	N13 -> N51[label="",style=dashed];
 	N13 -> N52[label="",style=dashed];
 	N13 -> N54[label="",style=dashed];
 	N13 -> N57[label="",style=dashed];
@@ -189,6 +191,7 @@ digraph dependencies {
 	N13 -> N80[label="",style=dashed];
 	N14 -> N2[label="",style=dashed];
 	N14 -> N4[label="",style=dashed];
+	N14 -> N8[label="",style=dashed];
 	N14 -> N12[label="",style=dashed];
 	N14 -> N32[label="",style=dashed];
 	N14 -> N36[label="",style=dashed];
@@ -229,6 +232,7 @@ digraph dependencies {
 	N43 -> N65[label="",style=dashed];
 	N49 -> N36[label="",style=dashed];
 	N49 -> N39[label="",style=dashed];
+	N51 -> N8[label="",style=dashed];
 	N51 -> N18[label="",style=dashed];
 	N52 -> N79[label="",style=dashed];
 	N52 -> N81[label="",style=dashed];
diff --git a/tools/graph.png b/tools/graph.png
index d8e22015..9847f459 100644
Binary files a/tools/graph.png and b/tools/graph.png differ