Merge branch 'master' into ng-solc-output

Cargo.lock

@@ -1249,7 +1249,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#5e3b9629692c550811b228d68ca99d1461a4f6cb"
+source = "git+https://github.com/ethcore/js-precompiled.git#b2513e92603b473799d653583bd86771e0063c08"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

ethcore/res/ethereum/tests

@@ -1 +1 @@
-Subproject commit 97066e40ccd061f727deb5cd860e4d9135aa2551
+Subproject commit 9028c4801fd39fbb71a9796979182549a24e81c8

ethcrypto/src/lib.rs

@@ -34,16 +34,43 @@ pub const KEY_LENGTH: usize = 32;
 pub const KEY_ITERATIONS: usize = 10240;
 pub const KEY_LENGTH_AES: usize = KEY_LENGTH / 2;
 
+#[derive(PartialEq, Debug)]
+pub enum ScryptError {
+	// log(N) < r / 16
+	InvalidN,
+	// p <= (2^31-1 * 32)/(128 * r)
+	InvalidP,
+}
+
+impl fmt::Display for ScryptError {
+	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+		let s = match *self {
+			ScryptError::InvalidN => "Invalid N argument of the scrypt encryption" ,
+			ScryptError::InvalidP => "Invalid p argument of the scrypt encryption",
+		};
+
+		write!(f, "{}", s)
+	}
+}
+
 #[derive(PartialEq, Debug)]
 pub enum Error {
 	Secp(SecpError),
+	Scrypt(ScryptError),
 	InvalidMessage,
 }
 
+impl From<ScryptError> for Error {
+	fn from(err: ScryptError) -> Self {
+		Error::Scrypt(err)
+	}
+}
+
 impl fmt::Display for Error {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		let s = match *self {
 			Error::Secp(ref err) => err.to_string(),
+			Error::Scrypt(ref err) => err.to_string(),
 			Error::InvalidMessage => "Invalid message".into(),
 		};
 
@@ -80,13 +107,23 @@ pub fn derive_key_iterations(password: &str, salt: &[u8; 32], c: u32) -> (Vec<u8
 	(derived_right_bits.to_vec(), derived_left_bits.to_vec())
 }
 
-pub fn derive_key_scrypt(password: &str, salt: &[u8; 32], n: u32, p: u32, r: u32) -> (Vec<u8>, Vec<u8>) {
+pub fn derive_key_scrypt(password: &str, salt: &[u8; 32], n: u32, p: u32, r: u32) -> Result<(Vec<u8>, Vec<u8>), Error> {
+	// sanity checks
+	let log_n = (32 - n.leading_zeros() - 1) as u8;
+	if log_n as u32 >= r * 16 {
+		return Err(Error::Scrypt(ScryptError::InvalidN));
+	}
+
+	if p as u64 > ((u32::max_value() as u64 - 1) * 32)/(128 * (r as u64)) {
+		return Err(Error::Scrypt(ScryptError::InvalidP));
+	}
+
 	let mut derived_key = vec![0u8; KEY_LENGTH];
-	let scrypt_params = ScryptParams::new(n.trailing_zeros() as u8, r, p);
+	let scrypt_params = ScryptParams::new(log_n, r, p);
 	scrypt(password.as_bytes(), salt, &scrypt_params, &mut derived_key);
 	let derived_right_bits = &derived_key[0..KEY_LENGTH_AES];
 	let derived_left_bits = &derived_key[KEY_LENGTH_AES..KEY_LENGTH];
-	(derived_right_bits.to_vec(), derived_left_bits.to_vec())
+	Ok((derived_right_bits.to_vec(), derived_left_bits.to_vec()))
 }
 
 pub fn derive_mac(derived_left_bits: &[u8], cipher_text: &[u8]) -> Vec<u8> {

ethstore/src/account/safe_account.rs

@@ -113,7 +113,7 @@ impl Crypto {
 
 		let (derived_left_bits, derived_right_bits) = match self.kdf {
 			Kdf::Pbkdf2(ref params) => crypto::derive_key_iterations(password, &params.salt, params.c),
-			Kdf::Scrypt(ref params) => crypto::derive_key_scrypt(password, &params.salt, params.n, params.p, params.r),
+			Kdf::Scrypt(ref params) => try!(crypto::derive_key_scrypt(password, &params.salt, params.n, params.p, params.r)),
 		};
 
 		let mac = crypto::derive_mac(&derived_right_bits, &self.ciphertext).keccak256();

ethstore/src/dir/disk.rs

@@ -20,6 +20,7 @@ use std::collections::HashMap;
 use time;
 use ethkey::Address;
 use {json, SafeAccount, Error};
+use json::UUID;
 use super::KeyDirectory;
 
 const IGNORED_FILES: &'static [&'static str] = &["thumbs.db", "address_book.json"];
@@ -112,7 +113,7 @@ impl KeyDirectory for DiskDirectory {
 		// build file path
 		let filename = account.filename.as_ref().cloned().unwrap_or_else(|| {
 			let timestamp = time::strftime("%Y-%m-%dT%H-%M-%S", &time::now_utc()).expect("Time-format string is valid.");
-			format!("UTC--{}Z--{:?}", timestamp, account.address)
+			format!("UTC--{}Z--{}", timestamp, UUID::from(account.id))
 		});
 
 		// update account filename

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.49",
+  "version": "0.2.52",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
@@ -139,6 +139,7 @@
     "mobx-react": "^3.5.8",
     "mobx-react-devtools": "^4.2.9",
     "moment": "^2.14.1",
+    "phoneformat.js": "^1.0.3",
     "qs": "^6.3.0",
     "react": "^15.2.1",
     "react-ace": "^4.0.0",

js/scripts/release.sh

@@ -68,11 +68,13 @@ if [ "$BRANCH" == "master" ]; then
 fi
 
 echo "*** Updating cargo parity-ui-precompiled#$PRECOMPILED_HASH"
+git submodule update
 cargo update -p parity-ui-precompiled
 # --precise "$PRECOMPILED_HASH"
 
 echo "*** Committing updated files"
-git add .
+git add js
+git add Cargo.lock
 git commit -m "[ci skip] js-precompiled $UTCDATE"
 git push origin HEAD:refs/heads/$BRANCH 2>$GITLOG
 

js/src/api/format/input.js

@@ -166,3 +166,11 @@ export function inTraceFilter (filterObject) {
 
   return filterObject;
 }
+
+export function inTraceType (whatTrace) {
+  if (isString(whatTrace)) {
+    return [whatTrace];
+  }
+
+  return whatTrace;
+}

js/src/api/format/input.spec.js

@@ -16,7 +16,7 @@
 
 import BigNumber from 'bignumber.js';
 
-import { inAddress, inBlockNumber, inData, inFilter, inHex, inNumber10, inNumber16, inOptions } from './input';
+import { inAddress, inBlockNumber, inData, inFilter, inHex, inNumber10, inNumber16, inOptions, inTraceType } from './input';
 import { isAddress } from '../../../test/types';
 
 describe('api/format/input', () => {
@@ -242,4 +242,16 @@ describe('api/format/input', () => {
       });
     });
   });
+
+  describe('inTraceType', () => {
+    it('returns array of types as is', () => {
+      const types = ['vmTrace', 'trace', 'stateDiff'];
+      expect(inTraceType(types)).to.deep.equal(types);
+    });
+
+    it('formats single string type into array', () => {
+      const type = 'vmTrace';
+      expect(inTraceType(type)).to.deep.equal([type]);
+    });
+  });
 });

js/src/api/format/output.js

@@ -254,3 +254,25 @@ export function outTrace (trace) {
 
   return trace;
 }
+
+export function outTraces (traces) {
+  if (traces) {
+    return traces.map(outTrace);
+  }
+
+  return traces;
+}
+
+export function outTraceReplay (trace) {
+  if (trace) {
+    Object.keys(trace).forEach((key) => {
+      switch (key) {
+        case 'trace':
+          trace[key] = outTraces(trace[key]);
+          break;
+      }
+    });
+  }
+
+  return trace;
+}

js/src/api/rpc/trace/trace.e2e.js

@@ -20,15 +20,25 @@ describe('ethapi.trace', () => {
   const ethapi = createHttpApi();
 
   describe('block', () => {
-    it('returns the latest block', () => {
-      return ethapi.trace.block().then((block) => {
-        expect(block).to.be.ok;
+    it('returns the latest block traces', () => {
+      return ethapi.trace.block().then((traces) => {
+        expect(traces).to.be.ok;
       });
     });
 
-    it('returns a specified block', () => {
-      return ethapi.trace.block('0x65432').then((block) => {
-        expect(block).to.be.ok;
+    it('returns traces for a specified block', () => {
+      return ethapi.trace.block('0x65432').then((traces) => {
+        expect(traces).to.be.ok;
+      });
+    });
+  });
+
+  describe('replayTransaction', () => {
+    it('returns traces for a specific transaction', () => {
+      return ethapi.eth.getBlockByNumber().then((latestBlock) => {
+        return ethapi.trace.replayTransaction(latestBlock.transactions[0]).then((traces) => {
+          expect(traces).to.be.ok;
+        });
       });
     });
   });

js/src/api/rpc/trace/trace.js

@@ -14,35 +14,53 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { inBlockNumber, inHex, inNumber16, inTraceFilter } from '../../format/input';
-import { outTrace } from '../../format/output';
+import { inBlockNumber, inData, inHex, inNumber16, inOptions, inTraceFilter, inTraceType } from '../../format/input';
+import { outTraces, outTraceReplay } from '../../format/output';
 
 export default class Trace {
   constructor (transport) {
     this._transport = transport;
   }
 
+  block (blockNumber = 'latest') {
+    return this._transport
+      .execute('trace_block', inBlockNumber(blockNumber))
+      .then(outTraces);
+  }
+
+  call (options, blockNumber = 'latest', whatTrace = ['trace']) {
+    return this._transport
+      .execute('trace_call', inOptions(options), inBlockNumber(blockNumber), inTraceType(whatTrace))
+      .then(outTraceReplay);
+  }
+
   filter (filterObj) {
     return this._transport
       .execute('trace_filter', inTraceFilter(filterObj))
-      .then(traces => traces.map(trace => outTrace(trace)));
+      .then(outTraces);
   }
 
   get (txHash, position) {
     return this._transport
       .execute('trace_get', inHex(txHash), inNumber16(position))
-      .then(trace => outTrace(trace));
+      .then(outTraces);
+  }
+
+  rawTransaction (data, whatTrace = ['trace']) {
+    return this._transport
+      .execute('trace_rawTransaction', inData(data), inTraceType(whatTrace))
+      .then(outTraceReplay);
+  }
+
+  replayTransaction (txHash, whatTrace = ['trace']) {
+    return this._transport
+      .execute('trace_replayTransaction', txHash, inTraceType(whatTrace))
+      .then(outTraceReplay);
   }
 
   transaction (txHash) {
     return this._transport
       .execute('trace_transaction', inHex(txHash))
-      .then(traces => traces.map(trace => outTrace(trace)));
-  }
-
-  block (blockNumber = 'latest') {
-    return this._transport
-      .execute('trace_block', inBlockNumber(blockNumber))
-      .then(traces => traces.map(trace => outTrace(trace)));
+      .then(outTraces);
   }
 }

js/src/contracts/abi/index.js

@@ -23,6 +23,7 @@ import githubhint from './githubhint.json';
 import owned from './owned.json';
 import registry from './registry.json';
 import signaturereg from './signaturereg.json';
+import smsverification from './sms-verification.json';
 import tokenreg from './tokenreg.json';
 import wallet from './wallet.json';
 
@@ -36,6 +37,7 @@ export {
   owned,
   registry,
   signaturereg,
+  smsverification,
   tokenreg,
   wallet
 };

js/src/contracts/abi/sms-verification.json

@@ -0,0 +1 @@
+[{"constant":false,"inputs":[{"name":"_new","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_who","type":"address"}],"name":"certify","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"request","outputs":[],"payable":true,"type":"function"},{"constant":false,"inputs":[{"name":"_who","type":"address"},{"name":"_puzzle","type":"bytes32"}],"name":"puzzle","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"getAddress","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_new","type":"uint256"}],"name":"setFee","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_who","type":"address"}],"name":"revoke","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_code","type":"bytes32"}],"name":"confirm","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"drain","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"delegate","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"getUint","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_new","type":"address"}],"name":"setDelegate","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"}],"name":"certified","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fee","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"get","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"}],"name":"Requested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"},{"indexed":false,"name":"puzzle","type":"bytes32"}],"name":"Puzzled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"}],"name":"Confirmed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"}],"name":"Revoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"old","type":"address"},{"indexed":true,"name":"current","type":"address"}],"name":"NewOwner","type":"event"}]

js/src/contracts/contracts.js

@@ -19,6 +19,7 @@ import Registry from './registry';
 import SignatureReg from './signaturereg';
 import TokenReg from './tokenreg';
 import GithubHint from './githubhint';
+import smsVerification from './sms-verification';
 
 let instance = null;
 
@@ -54,6 +55,10 @@ export default class Contracts {
     return this._githubhint;
   }
 
+  get smsVerification () {
+    return smsVerification;
+  }
+
   static create (api) {
     return new Contracts(api);
   }

js/src/contracts/sms-verification.js

@@ -0,0 +1,52 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { stringify } from 'querystring';
+
+export const checkIfVerified = (contract, account) => {
+  return contract.instance.certified.call({}, [account]);
+};
+
+export const checkIfRequested = (contract, account) => {
+  return new Promise((resolve, reject) => {
+    contract.subscribe('Requested', {
+      fromBlock: 0, toBlock: 'pending'
+    }, (err, logs) => {
+      if (err) {
+        return reject(err);
+      }
+      const e = logs.find((l) => {
+        return l.type === 'mined' && l.params.who && l.params.who.value === account;
+      });
+      resolve(e ? e.transactionHash : false);
+    });
+  });
+};
+
+export const postToServer = (query) => {
+  query = stringify(query);
+  return fetch('https://sms-verification.parity.io/?' + query, {
+    method: 'POST', mode: 'cors', cache: 'no-store'
+  })
+  .then((res) => {
+    return res.json().then((data) => {
+      if (res.ok) {
+        return data.message;
+      }
+      throw new Error(data.message || 'unknown error');
+    });
+  });
+};

js/src/jsonrpc/interfaces/trace.js

@@ -14,9 +14,45 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { BlockNumber, Hash, Integer } from '../types';
+import { BlockNumber, Data, Hash, Integer } from '../types';
 
 export default {
+  block: {
+    desc: 'Returns traces created at given block',
+    params: [
+      {
+        type: BlockNumber,
+        desc: 'Integer block number, or \'latest\' for the last mined block or \'pending\', \'earliest\' for not yet mined transactions'
+      }
+    ],
+    returns: {
+      type: Array,
+      desc: 'Block traces'
+    }
+  },
+
+  call: {
+    desc: 'Returns traces for a specific call',
+    params: [
+      {
+        type: Object,
+        desc: 'Call options'
+      },
+      {
+        type: BlockNumber,
+        desc: 'The blockNumber'
+      },
+      {
+        type: Array,
+        desc: 'Type of trace, one or more of \'vmTrace\', \'trace\' and/or \'stateDiff\''
+      }
+    ],
+    returns: {
+      type: Array,
+      desc: 'Block traces'
+    }
+  },
+
   filter: {
     desc: 'Returns traces matching given filter',
     params: [
@@ -49,6 +85,42 @@ export default {
     }
   },
 
+  rawTransaction: {
+    desc: 'Traces a call to eth_sendRawTransaction without making the call, returning the traces',
+    params: [
+      {
+        type: Data,
+        desc: 'Transaction data'
+      },
+      {
+        type: Array,
+        desc: 'Type of trace, one or more of \'vmTrace\', \'trace\' and/or \'stateDiff\''
+      }
+    ],
+    returns: {
+      type: Array,
+      desc: 'Block traces'
+    }
+  },
+
+  replayTransaction: {
+    desc: 'Replays a transaction, returning the traces',
+    params: [
+      {
+        type: Hash,
+        desc: 'Transaction hash'
+      },
+      {
+        type: Array,
+        desc: 'Type of trace, one or more of \'vmTrace\', \'trace\' and/or \'stateDiff\''
+      }
+    ],
+    returns: {
+      type: Array,
+      desc: 'Block traces'
+    }
+  },
+
   transaction: {
     desc: 'Returns all traces of given transaction',
     params: [
@@ -61,19 +133,5 @@ export default {
       type: Array,
       desc: 'Traces of given transaction'
     }
-  },
-
-  block: {
-    desc: 'Returns traces created at given block',
-    params: [
-      {
-        type: BlockNumber,
-        desc: 'Integer block number, or \'latest\' for the last mined block or \'pending\', \'earliest\' for not yet mined transactions'
-      }
-    ],
-    returns: {
-      type: Array,
-      desc: 'Block traces'
-    }
   }
 };

js/src/modals/SMSVerification/Done/done.css

@@ -0,0 +1,31 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+.spacing {
+  margin-top: 1.5em;
+}
+
+.container {
+  margin-top: .5em;
+  display: flex;
+  align-items: center;
+}
+
+.message {
+  margin-top: 0;
+  margin-bottom: 0;
+  margin-left: .5em;
+}

js/src/modals/SMSVerification/Done/done.js

@@ -0,0 +1,31 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component } from 'react';
+import SuccessIcon from 'material-ui/svg-icons/navigation/check';
+
+import styles from './done.css';
+
+export default class Done extends Component {
+  render () {
+    return (
+      <div className={ styles.container }>
+        <SuccessIcon />
+        <p className={ styles.message }>Congratulations, your account is verified!</p>
+      </div>
+    );
+  }
+}

js/src/modals/SMSVerification/Done/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './done';

js/src/modals/SMSVerification/GatherData/gatherData.css

@@ -0,0 +1,49 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.list li {
+  padding: .1em 0;
+}
+
+.spacing {
+  margin-top: 1.5em;
+}
+
+.container {
+  margin-top: .5em;
+  display: flex;
+  align-items: center;
+}
+.message {
+  margin-top: 0;
+  margin-bottom: 0;
+  margin-left: .5em;
+}
+
+.terms {
+  line-height: 1.3;
+  opacity: .7;
+
+  ul {
+    padding-left: 1.5em;
+  }
+
+  li {
+    margin-top: .2em;
+    margin-bottom: .2em;
+  }
+}

js/src/modals/SMSVerification/GatherData/gatherData.js

@@ -0,0 +1,151 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+import nullable from '../../../util/nullable-proptype';
+import BigNumber from 'bignumber.js';
+import { Checkbox } from 'material-ui';
+import InfoIcon from 'material-ui/svg-icons/action/info-outline';
+import SuccessIcon from 'material-ui/svg-icons/navigation/check';
+import ErrorIcon from 'material-ui/svg-icons/navigation/close';
+
+import { fromWei } from '../../../api/util/wei';
+import { Form, Input } from '../../../ui';
+
+import terms from '../terms-of-service';
+import styles from './gatherData.css';
+
+export default class GatherData extends Component {
+  static propTypes = {
+    fee: React.PropTypes.instanceOf(BigNumber),
+    isNumberValid: PropTypes.bool.isRequired,
+    isVerified: nullable(PropTypes.bool.isRequired),
+    hasRequested: nullable(PropTypes.bool.isRequired),
+    setNumber: PropTypes.func.isRequired,
+    setConsentGiven: PropTypes.func.isRequired
+  }
+
+  render () {
+    const { isNumberValid, isVerified } = this.props;
+
+    return (
+      <Form>
+        <p>The following steps will let you prove that you control both an account and a phone number.</p>
+        <ol className={ styles.list }>
+          <li>You send a verification request to a specific contract.</li>
+          <li>Our server puts a puzzle into this contract.</li>
+          <li>The code you receive via SMS is the solution to this puzzle.</li>
+        </ol>
+        { this.renderFee() }
+        { this.renderCertified() }
+        { this.renderRequested() }
+        <Input
+          label={ 'phone number' }
+          hint={ 'the SMS will be sent to this number' }
+          error={ isNumberValid ? null : 'invalid number' }
+          disabled={ isVerified }
+          onChange={ this.numberOnChange }
+          onSubmit={ this.numberOnSubmit }
+        />
+        <Checkbox
+          className={ styles.spacing }
+          label={ 'I agree to the terms and conditions below.' }
+          disabled={ isVerified }
+          onCheck={ this.consentOnChange }
+        />
+        <div className={ styles.terms }>{ terms }</div>
+      </Form>
+    );
+  }
+
+  renderFee () {
+    const { fee } = this.props;
+
+    if (!fee) {
+      return (<p>Fetching the fee…</p>);
+    }
+    return (
+      <div className={ styles.container }>
+        <InfoIcon />
+        <p className={ styles.message }>The fee is { fromWei(fee).toFixed(3) } ETH.</p>
+      </div>
+    );
+  }
+
+  renderCertified () {
+    const { isVerified } = this.props;
+
+    if (isVerified) {
+      return (
+        <div className={ styles.container }>
+          <ErrorIcon />
+          <p className={ styles.message }>Your account is already verified.</p>
+        </div>
+      );
+    } else if (isVerified === false) {
+      return (
+        <div className={ styles.container }>
+          <SuccessIcon />
+          <p className={ styles.message }>Your account is not verified yet.</p>
+        </div>
+      );
+    }
+    return (
+      <p className={ styles.message }>Checking if your account is verified…</p>
+    );
+  }
+
+  renderRequested () {
+    const { isVerified, hasRequested } = this.props;
+
+    // If the account is verified, don't show that it has requested verification.
+    if (isVerified) {
+      return null;
+    }
+
+    if (hasRequested) {
+      return (
+        <div className={ styles.container }>
+          <InfoIcon />
+          <p className={ styles.message }>You already requested verification.</p>
+        </div>
+      );
+    }
+    if (hasRequested === false) {
+      return (
+        <div className={ styles.container }>
+          <SuccessIcon />
+          <p className={ styles.message }>You did not request verification yet.</p>
+        </div>
+      );
+    }
+    return (
+      <p className={ styles.message }>Checking if you requested verification…</p>
+    );
+  }
+
+  numberOnSubmit = (value) => {
+    this.props.setNumber(value);
+  }
+
+  numberOnChange = (_, value) => {
+    this.props.setNumber(value);
+  }
+
+  consentOnChange = (_, consentGiven) => {
+    this.props.setConsentGiven(consentGiven);
+  }
+}

js/src/modals/SMSVerification/GatherData/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './gatherData';

js/src/modals/SMSVerification/QueryCode/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './queryCode';

js/src/modals/SMSVerification/QueryCode/queryCode.js

@@ -0,0 +1,52 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+
+import { Form, Input } from '../../../ui';
+
+export default class QueryCode extends Component {
+  static propTypes = {
+    number: PropTypes.string.isRequired,
+    isCodeValid: PropTypes.bool.isRequired,
+    setCode: PropTypes.func.isRequired
+  }
+
+  render () {
+    const { number, isCodeValid } = this.props;
+
+    return (
+      <Form>
+        <p>The verification code has been sent to { number }.</p>
+        <Input
+          label={ 'verification code' }
+          hint={ 'Enter the code you received via SMS.' }
+          error={ isCodeValid ? null : 'invalid code' }
+          onChange={ this.onChange }
+          onSubmit={ this.onSubmit }
+        />
+      </Form>
+    );
+  }
+
+  onChange = (_, code) => {
+    this.props.setCode(code.trim());
+  }
+
+  onSubmit = (code) => {
+    this.props.setCode(code.trim());
+  }
+}

js/src/modals/SMSVerification/SMSVerification.js

@@ -0,0 +1,176 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+import { observer } from 'mobx-react';
+import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
+import ContentClear from 'material-ui/svg-icons/content/clear';
+
+import { Button, IdentityIcon, Modal } from '../../ui';
+
+import {
+  LOADING,
+  QUERY_DATA,
+  POSTING_REQUEST, POSTED_REQUEST,
+  REQUESTING_SMS, REQUESTED_SMS,
+  POSTING_CONFIRMATION, POSTED_CONFIRMATION,
+  DONE
+} from './store';
+
+import GatherData from './GatherData';
+import SendRequest from './SendRequest';
+import QueryCode from './QueryCode';
+import SendConfirmation from './SendConfirmation';
+import Done from './Done';
+
+@observer
+export default class SMSVerification extends Component {
+  static propTypes = {
+    store: PropTypes.any.isRequired,
+    account: PropTypes.string.isRequired,
+    onClose: PropTypes.func.isRequired
+  }
+
+  static phases = { // mapping (store steps -> steps)
+    [LOADING]: 0,
+    [QUERY_DATA]: 1,
+    [POSTING_REQUEST]: 2, [POSTED_REQUEST]: 2, [REQUESTING_SMS]: 2,
+    [REQUESTED_SMS]: 3,
+    [POSTING_CONFIRMATION]: 4, [POSTED_CONFIRMATION]: 4,
+    [DONE]: 5
+  }
+
+  render () {
+    const phase = SMSVerification.phases[this.props.store.step];
+    const { error, isStepValid } = this.props.store;
+
+    return (
+      <Modal
+        actions={ this.renderDialogActions(phase, error, isStepValid) }
+        title='verify your account via SMS'
+        visible scroll
+        current={ phase }
+        steps={ ['Prepare', 'Enter Data', 'Request', 'Enter Code', 'Confirm', 'Done!'] }
+        waiting={ error ? [] : [ 0, 2, 4 ] }
+      >
+        { this.renderStep(phase, error) }
+      </Modal>
+    );
+  }
+
+  renderDialogActions (phase, error, isStepValid) {
+    const { store, account, onClose } = this.props;
+
+    const cancel = (
+      <Button
+        key='cancel' label='Cancel'
+        icon={ <ContentClear /> }
+        onClick={ onClose }
+      />
+    );
+    if (error) {
+      return (<div>{ cancel }</div>);
+    }
+
+    if (phase === 5) {
+      return (
+        <div>
+          { cancel }
+          <Button
+            key='done' label='Done'
+            disabled={ !isStepValid }
+            icon={ <ActionDoneAll /> }
+            onClick={ onClose }
+          />
+        </div>
+      );
+    }
+
+    let action = () => {};
+    switch (phase) {
+      case 1:
+        action = store.sendRequest;
+        break;
+      case 2:
+        action = store.queryCode;
+        break;
+      case 3:
+        action = store.sendConfirmation;
+        break;
+      case 4:
+        action = store.done;
+        break;
+    }
+
+    return (
+      <div>
+        { cancel }
+        <Button
+          key='next' label='Next'
+          disabled={ !isStepValid }
+          icon={ <IdentityIcon address={ account } button /> }
+          onClick={ action }
+        />
+      </div>
+    );
+  }
+
+  renderStep (phase, error) {
+    if (error) {
+      return (<p>{ error }</p>);
+    }
+
+    const {
+      step,
+      fee, number, isNumberValid, isVerified, hasRequested,
+      requestTx, isCodeValid, confirmationTx,
+      setNumber, setConsentGiven, setCode
+    } = this.props.store;
+
+    if (phase === 5) {
+      return (<Done />);
+    }
+    if (phase === 4) {
+      return (<SendConfirmation step={ step } tx={ confirmationTx } />);
+    }
+    if (phase === 3) {
+      return (
+        <QueryCode
+          number={ number } fee={ fee } isCodeValid={ isCodeValid }
+          setCode={ setCode }
+        />
+      );
+    }
+    if (phase === 2) {
+      return (<SendRequest step={ step } tx={ requestTx } />);
+    }
+    if (phase === 1) {
+      const { setNumber, setConsentGiven } = this.props.store;
+      return (
+        <GatherData
+          fee={ fee } isNumberValid={ isNumberValid }
+          isVerified={ isVerified } hasRequested={ hasRequested }
+          setNumber={ setNumber } setConsentGiven={ setConsentGiven }
+        />
+      );
+    }
+    if (phase === 0) {
+      return (<p>Preparing awesomeness!</p>);
+    }
+
+    return null;
+  }
+}

js/src/modals/SMSVerification/SendConfirmation/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './sendConfirmation';

js/src/modals/SMSVerification/SendConfirmation/sendConfirmation.css

@@ -0,0 +1,20 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.centered {
+  text-align: center;
+}

js/src/modals/SMSVerification/SendConfirmation/sendConfirmation.js

@@ -0,0 +1,51 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+import nullable from '../../../util/nullable-proptype';
+
+import TxHash from '../../../ui/TxHash';
+import {
+  POSTING_CONFIRMATION, POSTED_CONFIRMATION
+} from '../store';
+
+import styles from './sendConfirmation.css';
+
+export default class SendConfirmation extends Component {
+  static propTypes = {
+    step: PropTypes.any.isRequired,
+    tx: nullable(PropTypes.any.isRequired)
+  }
+
+  render () {
+    const { step, tx } = this.props;
+
+    if (step === POSTING_CONFIRMATION) {
+      return (<p>The verification code will be sent to the contract. Please authorize this using the Parity Signer.</p>);
+    }
+
+    if (step === POSTED_CONFIRMATION) {
+      return (
+        <div className={ styles.centered }>
+          <TxHash hash={ tx } maxConfirmations={ 2 } />
+          <p>Please keep this window open.</p>
+        </div>
+      );
+    }
+
+    return null;
+  }
+}

js/src/modals/SMSVerification/SendRequest/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './sendRequest';

js/src/modals/SMSVerification/SendRequest/sendRequest.css

@@ -0,0 +1,20 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.centered {
+  text-align: center;
+}

js/src/modals/SMSVerification/SendRequest/sendRequest.js

@@ -0,0 +1,57 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+import nullable from '../../../util/nullable-proptype';
+
+import TxHash from '../../../ui/TxHash';
+import {
+  POSTING_REQUEST, POSTED_REQUEST, REQUESTING_SMS
+} from '../store';
+
+import styles from './sendRequest.css';
+
+export default class SendRequest extends Component {
+  static propTypes = {
+    step: PropTypes.any.isRequired,
+    tx: nullable(PropTypes.any.isRequired)
+  }
+
+  render () {
+    const { step, tx } = this.props;
+
+    switch (step) {
+      case POSTING_REQUEST:
+        return (<p>A verification request will be sent to the contract. Please authorize this using the Parity Signer.</p>);
+
+      case POSTED_REQUEST:
+        return (
+          <div className={ styles.centered }>
+            <TxHash hash={ tx } maxConfirmations={ 1 } />
+            <p>Please keep this window open.</p>
+          </div>
+        );
+
+      case REQUESTING_SMS:
+        return (
+          <p>Requesting an SMS from the Parity server.</p>
+        );
+
+      default:
+        return null;
+    }
+  }
+}

js/src/modals/SMSVerification/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './SMSVerification';

js/src/modals/SMSVerification/store.js

@@ -0,0 +1,246 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { observable, computed, autorun, action } from 'mobx';
+import phone from 'phoneformat.js';
+import { sha3 } from '../../api/util/sha3';
+
+import Contracts from '../../contracts';
+
+import { checkIfVerified, checkIfRequested, postToServer } from '../../contracts/sms-verification';
+import checkIfTxFailed from '../../util/check-if-tx-failed';
+import waitForConfirmations from '../../util/wait-for-block-confirmations';
+
+const validCode = /^[A-Z\s]+$/i;
+
+export const LOADING = 'fetching-contract';
+export const QUERY_DATA = 'query-data';
+export const POSTING_REQUEST = 'posting-request';
+export const POSTED_REQUEST = 'posted-request';
+export const REQUESTING_SMS = 'requesting-sms';
+export const REQUESTED_SMS = 'requested-sms';
+export const QUERY_CODE = 'query-code';
+export const POSTING_CONFIRMATION = 'posting-confirmation';
+export const POSTED_CONFIRMATION = 'posted-confirmation';
+export const DONE = 'done';
+
+export default class VerificationStore {
+  @observable step = null;
+  @observable error = null;
+
+  @observable contract = null;
+  @observable fee = null;
+  @observable isVerified = null;
+  @observable hasRequested = null;
+  @observable consentGiven = false;
+  @observable number = '';
+  @observable requestTx = null;
+  @observable code = '';
+  @observable confirmationTx = null;
+
+  @computed get isCodeValid () {
+    return validCode.test(this.code);
+  }
+  @computed get isNumberValid () {
+    return phone.isValidNumber(this.number);
+  }
+
+  @computed get isStepValid () {
+    if (this.step === DONE) {
+      return true;
+    }
+    if (this.error) {
+      return false;
+    }
+
+    switch (this.step) {
+      case LOADING:
+        return this.contract && this.fee && this.isVerified !== null && this.hasRequested !== null;
+      case QUERY_DATA:
+        return this.isNumberValid && this.consentGiven;
+      case REQUESTED_SMS:
+        return this.requestTx;
+      case QUERY_CODE:
+        return this.isCodeValid;
+      case POSTED_CONFIRMATION:
+        return this.confirmationTx;
+      default:
+        return false;
+    }
+  }
+
+  constructor (api, account) {
+    this.api = api;
+    this.account = account;
+
+    this.step = LOADING;
+    Contracts.create(api).registry.getContract('smsVerification')
+      .then((contract) => {
+        this.contract = contract;
+        this.load();
+      })
+      .catch((err) => {
+        this.error = 'Failed to fetch the contract: ' + err.message;
+      });
+
+    autorun(() => {
+      if (this.error) {
+        console.error('sms verification: ' + this.error);
+      }
+    });
+  }
+
+  @action load = () => {
+    const { contract, account } = this;
+    this.step = LOADING;
+
+    const fee = contract.instance.fee.call()
+      .then((fee) => {
+        this.fee = fee;
+      })
+      .catch((err) => {
+        this.error = 'Failed to fetch the fee: ' + err.message;
+      });
+
+    const isVerified = checkIfVerified(contract, account)
+      .then((isVerified) => {
+        this.isVerified = isVerified;
+      })
+      .catch((err) => {
+        this.error = 'Failed to check if verified: ' + err.message;
+      });
+
+    const hasRequested = checkIfRequested(contract, account)
+      .then((txHash) => {
+        this.hasRequested = !!txHash;
+        if (txHash) {
+          this.requestTx = txHash;
+        }
+      })
+      .catch((err) => {
+        this.error = 'Failed to check if requested: ' + err.message;
+      });
+
+    Promise
+      .all([ fee, isVerified, hasRequested ])
+      .then(() => {
+        this.step = QUERY_DATA;
+      });
+  }
+
+  @action setNumber = (number) => {
+    this.number = number;
+  }
+
+  @action setConsentGiven = (consentGiven) => {
+    this.consentGiven = consentGiven;
+  }
+
+  @action setCode = (code) => {
+    this.code = code;
+  }
+
+  @action sendRequest = () => {
+    const { api, account, contract, fee, number, hasRequested } = this;
+
+    const request = contract.functions.find((fn) => fn.name === 'request');
+    const options = { from: account, value: fee.toString() };
+
+    let chain = Promise.resolve();
+    if (!hasRequested) {
+      this.step = POSTING_REQUEST;
+      chain = request.estimateGas(options, [])
+        .then((gas) => {
+          options.gas = gas.mul(1.2).toFixed(0);
+          return request.postTransaction(options, []);
+        })
+        .then((handle) => {
+          // TODO: The "request rejected" error doesn't have any property to
+          // distinguish it from other errors, so we can't give a meaningful error here.
+          return api.pollMethod('parity_checkRequest', handle);
+        })
+        .then((txHash) => {
+          this.requestTx = txHash;
+          return checkIfTxFailed(api, txHash, options.gas)
+            .then((hasFailed) => {
+              if (hasFailed) {
+                throw new Error('Transaction failed, all gas used up.');
+              }
+              this.step = POSTED_REQUEST;
+              return waitForConfirmations(api, txHash, 1);
+            });
+        });
+    }
+
+    chain
+      .then(() => {
+        this.step = REQUESTING_SMS;
+        return postToServer({ number, address: account });
+      })
+      .then(() => {
+        this.step = REQUESTED_SMS;
+      })
+      .catch((err) => {
+        this.error = 'Failed to request a confirmation SMS: ' + err.message;
+      });
+  }
+
+  @action queryCode = () => {
+    this.step = QUERY_CODE;
+  }
+
+  @action sendConfirmation = () => {
+    const { api, account, contract, code } = this;
+    const token = sha3(code);
+
+    const confirm = contract.functions.find((fn) => fn.name === 'confirm');
+    const options = { from: account };
+    const values = [ token ];
+
+    this.step = POSTING_CONFIRMATION;
+    confirm.estimateGas(options, values)
+      .then((gas) => {
+        options.gas = gas.mul(1.2).toFixed(0);
+        return confirm.postTransaction(options, values);
+      })
+      .then((handle) => {
+        // TODO: The "request rejected" error doesn't have any property to
+        // distinguish it from other errors, so we can't give a meaningful error here.
+        return api.pollMethod('parity_checkRequest', handle);
+      })
+      .then((txHash) => {
+        this.confirmationTx = txHash;
+        return checkIfTxFailed(api, txHash, options.gas)
+          .then((hasFailed) => {
+            if (hasFailed) {
+              throw new Error('Transaction failed, all gas used up.');
+            }
+            this.step = POSTED_CONFIRMATION;
+            return waitForConfirmations(api, txHash, 1);
+          });
+      })
+      .then(() => {
+        this.step = DONE;
+      })
+      .catch((err) => {
+        this.error = 'Failed to send the verification code: ' + err.message;
+      });
+  }
+
+  @action done = () => {
+    this.step = DONE;
+  }
+}

js/src/modals/SMSVerification/terms-of-service.js

@@ -0,0 +1,27 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React from 'react';
+
+export default (
+  <ul>
+    <li>This privacy notice relates to your use of the Parity SMS verification service. We take your privacy seriously and deal in an honest, direct and transparent way when it comes to your data.</li>
+    <li>We collect your phone number when you use this service. This is temporarily kept in memory, and then encrypted and stored in our EU servers. We only retain the cryptographic hash of the number to prevent duplicated accounts. You consent to this use.</li>
+    <li>You pay a fee for the cost of this service using the account you want to verify.</li>
+    <li>Your phone number is transmitted to a third party US SMS verification service Twilio for the sole purpose of the SMS verification. You consent to this use. Twilio’s privacy policy is here: <a href={ 'https://www.twilio.com/legal/privacy/developer' }>https://www.twilio.com/legal/privacy/developer</a>.</li>
+    <li><i>Parity Technology Limited</i> is registered in England and Wales under company number <code>09760015</code> and complies with the Data Protection Act 1998 (UK). You may contact us via email at <a href={ 'mailto:admin@parity.io' }>admin@parity.io</a>. Our general privacy policy can be found here: <a href={ 'https://ethcore.io/legal.html' }>https://ethcore.io/legal.html</a>.</li>
+  </ul>
+);

js/src/modals/index.js

@@ -22,6 +22,7 @@ import EditMeta from './EditMeta';
 import ExecuteContract from './ExecuteContract';
 import FirstRun from './FirstRun';
 import Shapeshift from './Shapeshift';
+import SMSVerification from './SMSVerification';
 import Transfer from './Transfer';
 import PasswordManager from './PasswordManager';
 import SaveContract from './SaveContract';
@@ -36,6 +37,7 @@ export {
   ExecuteContract,
   FirstRun,
   Shapeshift,
+  SMSVerification,
   Transfer,
   PasswordManager,
   LoadContract,

js/src/ui/TxHash/txHash.js

@@ -31,9 +31,14 @@ class TxHash extends Component {
   static propTypes = {
     hash: PropTypes.string.isRequired,
     isTest: PropTypes.bool,
-    summary: PropTypes.bool
+    summary: PropTypes.bool,
+    maxConfirmations: PropTypes.number
   }
 
+  static defaultProps = {
+    maxConfirmations: 10
+  };
+
   state = {
     blockNumber: new BigNumber(0),
     transaction: null,
@@ -79,6 +84,7 @@ class TxHash extends Component {
   }
 
   renderConfirmations () {
+    const { maxConfirmations } = this.props;
     const { blockNumber, transaction } = this.state;
 
     let txBlock = 'Pending';
@@ -89,14 +95,16 @@ class TxHash extends Component {
       const num = blockNumber.minus(transaction.blockNumber).plus(1);
       txBlock = `#${transaction.blockNumber.toFormat(0)}`;
       confirmations = num.toFormat(0);
-      value = num.gt(10) ? 10 : num.toNumber();
+      value = num.gt(maxConfirmations) ? maxConfirmations : num.toNumber();
     }
 
     return (
       <div className={ styles.confirm }>
         <LinearProgress
           className={ styles.progressbar }
-          min={ 0 } max={ 10 } value={ value }
+          min={ 0 }
+          max={ maxConfirmations }
+          value={ value }
           color='white'
           mode='determinate' />
         <div className={ styles.progressinfo }>

js/src/util/check-if-tx-failed.js

@@ -0,0 +1,28 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+const checkIfTxFailed = (api, tx, gasSent) => {
+  return api.pollMethod('eth_getTransactionReceipt', tx)
+  .then((receipt) => {
+    // TODO: Right now, there's no way to tell wether the EVM code crashed.
+    // Because you usually send a bit more gas than estimated (to make sure
+    // it gets mined quickly), we transaction probably failed if all the gas
+    // has been used up.
+    return receipt.gasUsed.eq(gasSent);
+  });
+};
+
+export default checkIfTxFailed;

js/src/util/nullable-proptype.js

@@ -0,0 +1,21 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { PropTypes } from 'react';
+
+export default function (type) {
+  return PropTypes.oneOfType([ PropTypes.oneOf([ null ]), type ]);
+}

js/src/util/wait-for-block-confirmations.js

@@ -0,0 +1,44 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+const isValidReceipt = (receipt) => {
+  return receipt && receipt.blockNumber && receipt.blockNumber.gt(0);
+};
+
+const waitForConfirmations = (api, tx, confirmations) => {
+  return new Promise((resolve, reject) => {
+    api.pollMethod('eth_getTransactionReceipt', tx, isValidReceipt)
+    .then((receipt) => {
+      let subscription;
+      api.subscribe('eth_blockNumber', (err, block) => {
+        if (err) {
+          reject(err);
+        } else if (block.minus(confirmations - 1).gte(receipt.blockNumber)) {
+          if (subscription) {
+            api.unsubscribe(subscription);
+          }
+          resolve();
+        }
+      })
+      .then((_subscription) => {
+        subscription = _subscription;
+      })
+      .catch(reject);
+    });
+  });
+};
+
+export default waitForConfirmations;

js/src/views/Account/account.js

@@ -20,8 +20,9 @@ import { bindActionCreators } from 'redux';
 import ContentCreate from 'material-ui/svg-icons/content/create';
 import ContentSend from 'material-ui/svg-icons/content/send';
 import LockIcon from 'material-ui/svg-icons/action/lock';
+import VerifyIcon from 'material-ui/svg-icons/action/verified-user';
 
-import { EditMeta, Shapeshift, Transfer, PasswordManager } from '../../modals';
+import { EditMeta, Shapeshift, SMSVerification, Transfer, PasswordManager } from '../../modals';
 import { Actionbar, Button, Page } from '../../ui';
 
 import shapeshiftBtn from '../../../assets/images/shapeshift-btn.png';
@@ -29,9 +30,15 @@ import shapeshiftBtn from '../../../assets/images/shapeshift-btn.png';
 import Header from './Header';
 import Transactions from './Transactions';
 
+import VerificationStore from '../../modals/SMSVerification/store';
+
 import styles from './account.css';
 
 class Account extends Component {
+  static contextTypes = {
+    api: PropTypes.object.isRequired
+  }
+
   static propTypes = {
     params: PropTypes.object,
     accounts: PropTypes.object,
@@ -45,10 +52,20 @@ class Account extends Component {
   state = {
     showEditDialog: false,
     showFundDialog: false,
+    showVerificationDialog: false,
+    verificationStore: null,
     showTransferDialog: false,
     showPasswordDialog: false
   }
 
+  componentDidMount () {
+    const { api } = this.context;
+    const { address } = this.props.params;
+
+    const store = new VerificationStore(api, address);
+    this.setState({ verificationStore: store });
+  }
+
   render () {
     const { accounts, balances, isTest } = this.props;
     const { address } = this.props.params;
@@ -64,6 +81,7 @@ class Account extends Component {
       <div className={ styles.account }>
         { this.renderEditDialog(account) }
         { this.renderFundDialog() }
+        { this.renderVerificationDialog() }
         { this.renderTransferDialog() }
         { this.renderPasswordDialog() }
         { this.renderActionbar() }
@@ -99,6 +117,11 @@ class Account extends Component {
         icon={ <img src={ shapeshiftBtn } className={ styles.btnicon } /> }
         label='shapeshift'
         onClick={ this.onShapeshiftAccountClick } />,
+      <Button
+        key='sms-verification'
+        icon={ <VerifyIcon /> }
+        label='Verify'
+        onClick={ this.openVerification } />,
       <Button
         key='editmeta'
         icon={ <ContentCreate /> }
@@ -149,6 +172,22 @@ class Account extends Component {
     );
   }
 
+  renderVerificationDialog () {
+    if (!this.state.showVerificationDialog) {
+      return null;
+    }
+
+    const store = this.state.verificationStore;
+    const { address } = this.props.params;
+
+    return (
+      <SMSVerification
+        store={ store } account={ address }
+        onClose={ this.onVerificationClose }
+      />
+    );
+  }
+
   renderTransferDialog () {
     const { showTransferDialog } = this.state;
 
@@ -205,6 +244,14 @@ class Account extends Component {
     this.onShapeshiftAccountClick();
   }
 
+  openVerification = () => {
+    this.setState({ showVerificationDialog: true });
+  }
+
+  onVerificationClose = () => {
+    this.setState({ showVerificationDialog: false });
+  }
+
   onTransferClick = () => {
     this.setState({
       showTransferDialog: !this.state.showTransferDialog

js/src/views/Signer/components/SignRequest/SignRequest.js

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import nullable from '../../../../util/nullable-proptype';
 
 import Account from '../Account';
 import TransactionPendingForm from '../TransactionPendingForm';
@@ -22,8 +23,6 @@ import TxHashLink from '../TxHashLink';
 
 import styles from './SignRequest.css';
 
-const nullable = (type) => React.PropTypes.oneOfType([ React.PropTypes.oneOf([ null ]), type ]);
-
 export default class SignRequest extends Component {
   static contextTypes = {
     api: PropTypes.object

js/src/views/Signer/components/TransactionFinished/TransactionFinished.js

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import nullable from '../../../../util/nullable-proptype';
 
 import CircularProgress from 'material-ui/CircularProgress';
 
@@ -29,8 +30,6 @@ import styles from './TransactionFinished.css';
 import * as tUtil from '../util/transaction';
 import { capitalize } from '../util/util';
 
-const nullable = (type) => React.PropTypes.oneOfType([ React.PropTypes.oneOf([ null ]), type ]);
-
 export default class TransactionFinished extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired

mac/install-readme.txt

@@ -14,7 +14,7 @@ To temporarily disable Parity Wallet (and stop Parity) use:
 
 To completely uninstall Parity Wallet use:
 
-	sudo -c /usr/local/libexec/uninstall-parity.sh
+	sudo /usr/local/libexec/uninstall-parity.sh
 
 
-Parity is distributed under the terms of the GPL.
+Parity is distributed under the terms of the GPL.

sync/src/block_sync.rs

@@ -33,6 +33,7 @@ const MAX_BODIES_TO_REQUEST: usize = 64;
 const MAX_RECEPITS_TO_REQUEST: usize = 128;
 const SUBCHAIN_SIZE: u64 = 256;
 const MAX_ROUND_PARENTS: usize = 32;
+const MAX_PARALLEL_SUBCHAIN_DOWNLOAD: usize = 5;
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
 /// Downloader state
@@ -62,6 +63,14 @@ pub enum BlockRequest {
 	},
 }
 
+/// Indicates sync action
+pub enum DownloadAction {
+	/// Do nothing
+	None,
+	/// Reset downloads for all peers
+	Reset
+}
+
 #[derive(Eq, PartialEq, Debug)]
 pub enum BlockDownloaderImportError {
 	/// Imported data is rejected as invalid.
@@ -175,11 +184,11 @@ impl BlockDownloader {
 	}
 
 	/// Add new block headers.
-	pub fn import_headers(&mut self, io: &mut SyncIo, r: &UntrustedRlp, expected_hash: Option<H256>) -> Result<(), BlockDownloaderImportError> {
+	pub fn import_headers(&mut self, io: &mut SyncIo, r: &UntrustedRlp, expected_hash: Option<H256>) -> Result<DownloadAction, BlockDownloaderImportError> {
 		let item_count = r.item_count();
 		if self.state == State::Idle {
 			trace!(target: "sync", "Ignored unexpected block headers");
-			return Ok(())
+			return Ok(DownloadAction::None)
 		}
 		if item_count == 0 && (self.state == State::Blocks) {
 			return Err(BlockDownloaderImportError::Invalid);
@@ -188,6 +197,7 @@ impl BlockDownloader {
 		let mut headers = Vec::new();
 		let mut hashes = Vec::new();
 		let mut valid_response = item_count == 0; //empty response is valid
+		let mut any_known = false;
 		for i in 0..item_count {
 			let info: BlockHeader = try!(r.val_at(i).map_err(|e| {
 				trace!(target: "sync", "Error decoding block header RLP: {:?}", e);
@@ -200,6 +210,7 @@ impl BlockDownloader {
 					valid_response = expected == info.hash()
 				}
 			}
+			any_known = any_known || self.blocks.contains_head(&info.hash());
 			if self.blocks.contains(&info.hash()) {
 				trace!(target: "sync", "Skipping existing block header {} ({:?})", number, info.hash());
 				continue;
@@ -245,17 +256,22 @@ impl BlockDownloader {
 					trace!(target: "sync", "Received {} subchain heads, proceeding to download", headers.len());
 					self.blocks.reset_to(hashes);
 					self.state = State::Blocks;
+					return Ok(DownloadAction::Reset);
 				}
 			},
 			State::Blocks => {
 				let count = headers.len();
+				// At least one of the heades must advance the subchain. Otherwise they are all useless.
+				if !any_known {
+					return Err(BlockDownloaderImportError::Useless);
+				}
 				self.blocks.insert_headers(headers);
 				trace!(target: "sync", "Inserted {} headers", count);
 			},
 			_ => trace!(target: "sync", "Unexpected headers({})", headers.len()),
 		}
 
-		Ok(())
+		Ok(DownloadAction::None)
 	}
 
 	/// Called by peer once it has new block bodies
@@ -342,22 +358,24 @@ impl BlockDownloader {
 	}
 
 	/// Find some headers or blocks to download for a peer.
-	pub fn request_blocks(&mut self, io: &mut SyncIo) -> Option<BlockRequest> {
+	pub fn request_blocks(&mut self, io: &mut SyncIo, num_active_peers: usize) -> Option<BlockRequest> {
 		match self.state {
 			State::Idle => {
 				self.start_sync_round(io);
-				return self.request_blocks(io);
+				return self.request_blocks(io, num_active_peers);
 			},
 			State::ChainHead => {
-				// Request subchain headers
-				trace!(target: "sync", "Starting sync with better chain");
-				// Request MAX_HEADERS_TO_REQUEST - 2 headers apart so that
-				// MAX_HEADERS_TO_REQUEST would include headers for neighbouring subchains
-				return Some(BlockRequest::Headers {
-					start: self.last_imported_hash.clone(),
-					count: SUBCHAIN_SIZE,
-					skip: (MAX_HEADERS_TO_REQUEST - 2) as u64,
-				});
+				if num_active_peers < MAX_PARALLEL_SUBCHAIN_DOWNLOAD {
+					// Request subchain headers
+					trace!(target: "sync", "Starting sync with better chain");
+					// Request MAX_HEADERS_TO_REQUEST - 2 headers apart so that
+					// MAX_HEADERS_TO_REQUEST would include headers for neighbouring subchains
+					return Some(BlockRequest::Headers {
+						start: self.last_imported_hash.clone(),
+						count: SUBCHAIN_SIZE,
+						skip: (MAX_HEADERS_TO_REQUEST - 2) as u64,
+					});
+				}
 			},
 			State::Blocks => {
 				// check to see if we need to download any block bodies first

sync/src/blocks.rs

@@ -301,11 +301,16 @@ impl BlockCollection {
 		self.heads.len() == 0 || (self.heads.len() == 1 && self.head.map_or(false, |h| h == self.heads[0]))
 	}
 
-	/// Chech is collection contains a block header.
+	/// Check if collection contains a block header.
 	pub fn contains(&self, hash: &H256) -> bool {
 		self.blocks.contains_key(hash)
 	}
 
+	/// Check if collection contains a block header.
+	pub fn contains_head(&self, hash: &H256) -> bool {
+		self.heads.contains(hash)
+	}
+
 	/// Return used heap size.
 	pub fn heap_size(&self) -> usize {
 		self.heads.heap_size_of_children()

sync/src/chain.rs

@@ -37,7 +37,7 @@
 /// Workflow for `ChainHead` state.
 /// In this state we try to get subchain headers with a single `GetBlockHeaders` request.
 /// On `NewPeer` / On `Restart`:
-/// 	If peer's total difficulty is higher, request N/M headers with interval M+1 starting from l
+/// 	If peer's total difficulty is higher and there are less than 5 peers downloading, request N/M headers with interval M+1 starting from l
 /// On `BlockHeaders(R)`:
 /// 	If R is empty:
 /// If l is equal to genesis block hash or l is more than 1000 blocks behind our best hash:
@@ -49,8 +49,8 @@
 /// Else
 /// 	Set S to R, set s to `Blocks`.
 ///
-///
 /// All other messages are ignored.
+///
 /// Workflow for `Blocks` state.
 /// In this state we download block headers and bodies from multiple peers.
 /// On `NewPeer` / On `Restart`:
@@ -62,7 +62,9 @@
 ///
 /// On `BlockHeaders(R)`:
 /// If R is empty remove current peer from P and restart.
-/// 	Validate received headers. For each header find a parent in H or R or the blockchain. Restart if there is a block with unknown parent.
+/// 	Validate received headers:
+/// 		For each header find a parent in H or R or the blockchain. Restart if there is a block with unknown parent.
+/// 		Find at least one header from the received list in S. Restart if there is none.
 /// Go to `CollectBlocks`.
 ///
 /// On `BlockBodies(R)`:
@@ -98,7 +100,7 @@ use ethcore::snapshot::{ManifestData, RestorationStatus};
 use sync_io::SyncIo;
 use time;
 use super::SyncConfig;
-use block_sync::{BlockDownloader, BlockRequest, BlockDownloaderImportError as DownloaderImportError};
+use block_sync::{BlockDownloader, BlockRequest, BlockDownloaderImportError as DownloaderImportError, DownloadAction};
 use snapshot::{Snapshot, ChunkType};
 use rand::{thread_rng, Rng};
 use api::{PeerInfo as PeerInfoDigest, WARP_SYNC_PROTOCOL_ID};
@@ -306,6 +308,15 @@ impl PeerInfo {
 	fn is_allowed(&self) -> bool {
 		self.confirmation != ForkConfirmation::Unconfirmed && !self.expired
 	}
+
+	fn reset_asking(&mut self) {
+		self.asking_blocks.clear();
+		self.asking_hash = None;
+		// mark any pending requests as expired
+		if self.asking != PeerAsking::Nothing && self.is_allowed() {
+			self.expired = true;
+		}
+	}
 }
 
 /// Blockchain sync handler.
@@ -425,12 +436,7 @@ impl ChainSync {
 		}
 		for (_, ref mut p) in &mut self.peers {
 			if p.block_set != Some(BlockSet::OldBlocks) {
-				p.asking_blocks.clear();
-				p.asking_hash = None;
-				// mark any pending requests as expired
-				if p.asking != PeerAsking::Nothing && p.is_allowed() {
-					p.expired = true;
-				}
+				p.reset_asking();
 			}
 		}
 		self.state = SyncState::Idle;
@@ -641,8 +647,9 @@ impl ChainSync {
 
 		self.clear_peer_download(peer_id);
 		let expected_hash = self.peers.get(&peer_id).and_then(|p| p.asking_hash);
+		let allowed = self.peers.get(&peer_id).map(|p| p.is_allowed()).unwrap_or(false);
 		let block_set = self.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
-		if !self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders) || expected_hash.is_none() {
+		if !self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders) || expected_hash.is_none() || !allowed {
 			trace!(target: "sync", "{}: Ignored unexpected headers, expected_hash = {:?}", peer_id, expected_hash);
 			self.continue_sync(io);
 			return Ok(());
@@ -687,7 +694,15 @@ impl ChainSync {
 				self.continue_sync(io);
 				return Ok(());
 			},
-			Ok(()) => (),
+			Ok(DownloadAction::Reset) => {
+				// mark all outstanding requests as expired
+				trace!("Resetting downloads for {:?}", block_set);
+				for (_, ref mut p) in self.peers.iter_mut().filter(|&(_, ref p)| p.block_set == Some(block_set)) {
+					p.reset_asking();
+				}
+
+			}
+			Ok(DownloadAction::None) => {},
 		}
 
 		self.collect_blocks(io, block_set);
@@ -979,7 +994,7 @@ impl ChainSync {
 			return Ok(());
 		}
 		self.clear_peer_download(peer_id);
-		if !self.reset_peer_asking(peer_id, PeerAsking::SnapshotData) || self.state != SyncState::SnapshotData {
+		if !self.reset_peer_asking(peer_id, PeerAsking::SnapshotData) || (self.state != SyncState::SnapshotData && self.state != SyncState::SnapshotWaiting) {
 			trace!(target: "sync", "{}: Ignored unexpected snapshot data", peer_id);
 			self.continue_sync(io);
 			return Ok(());
@@ -1111,6 +1126,7 @@ impl ChainSync {
 		};
 		let chain_info = io.chain().chain_info();
 		let syncing_difficulty = chain_info.pending_total_difficulty;
+		let num_active_peers = self.peers.values().filter(|p| p.asking != PeerAsking::Nothing).count();
 
 		let higher_difficulty = peer_difficulty.map_or(true, |pd| pd > syncing_difficulty);
 		if force || self.state == SyncState::NewBlocks || higher_difficulty || self.old_blocks.is_some() {
@@ -1128,7 +1144,7 @@ impl ChainSync {
 					let have_latest = io.chain().block_status(BlockID::Hash(peer_latest)) != BlockStatus::Unknown;
 					if !have_latest && (higher_difficulty || force || self.state == SyncState::NewBlocks) {
 						// check if got new blocks to download
-						if let Some(request) = self.new_blocks.request_blocks(io) {
+						if let Some(request) = self.new_blocks.request_blocks(io, num_active_peers) {
 							self.request_blocks(io, peer_id, request, BlockSet::NewBlocks);
 							if self.state == SyncState::Idle {
 								self.state = SyncState::Blocks;
@@ -1137,7 +1153,7 @@ impl ChainSync {
 						}
 					}
 
-					if let Some(request) = self.old_blocks.as_mut().and_then(|d| d.request_blocks(io)) {
+					if let Some(request) = self.old_blocks.as_mut().and_then(|d| d.request_blocks(io, num_active_peers)) {
 						self.request_blocks(io, peer_id, request, BlockSet::OldBlocks);
 						return;
 					}