Merge pull request #5304 from paritytech/mh-webserver

Public node with accounts and signing in Frontend

ethkey/src/brain.rs

@@ -29,7 +29,7 @@ impl Brain {
 impl Generator for Brain {
 	fn generate(self) -> Result<KeyPair, Error> {
 		let seed = self.0;
-		let mut secret = seed.bytes().collect::<Vec<u8>>().keccak256();
+		let mut secret = seed.into_bytes().keccak256();
 
 		let mut i = 0;
 		loop {

js/package.json

@@ -171,6 +171,7 @@
     "geopattern": "1.2.3",
     "isomorphic-fetch": "2.2.1",
     "js-sha3": "0.5.5",
+    "keythereum": "0.4.3",
     "lodash": "4.17.2",
     "loglevel": "1.4.1",
     "marked": "0.3.6",
@@ -207,6 +208,7 @@
     "redux-thunk": "2.1.0",
     "rlp": "2.0.0",
     "scryptsy": "2.0.0",
+    "secp256k1": "3.2.5",
     "solc": "ngotchac/solc-js",
     "store": "1.3.20",
     "sw-toolbox": "^3.6.0",

js/src/api/api.js

@@ -23,6 +23,7 @@ import { Db, Eth, Parity, Net, Personal, Shh, Signer, Trace, Web3 } from './rpc'
 import Subscriptions from './subscriptions';
 import util from './util';
 import { isFunction } from './util/types';
+import { LocalAccountsMiddleware } from './local';
 
 export default class Api extends EventEmitter {
   constructor (transport) {
@@ -45,6 +46,21 @@ export default class Api extends EventEmitter {
     this._web3 = new Web3(transport);
 
     this._subscriptions = new Subscriptions(this);
+
+    // Doing a request here in test env would cause an error
+    if (process.env.NODE_ENV !== 'test') {
+      const middleware = this.parity
+        .nodeKind()
+        .then((nodeKind) => {
+          if (nodeKind.availability === 'public') {
+            return new LocalAccountsMiddleware(transport);
+          }
+
+          return null;
+        });
+
+      transport.addMiddleware(middleware);
+    }
   }
 
   get db () {

js/src/api/local/accounts/account.js

@@ -0,0 +1,95 @@
+// Copyright 2015-2017 Parity Technologies (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 { keythereum } from '../ethkey';
+
+export default class Account {
+  constructor (persist, data) {
+    const {
+      keyObject,
+      meta = {},
+      name = ''
+    } = data;
+
+    this._persist = persist;
+    this._keyObject = keyObject;
+    this._name = name;
+    this._meta = meta;
+  }
+
+  isValidPassword (password) {
+    try {
+      keythereum.recover(Buffer.from(password), this._keyObject);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  get address () {
+    return `0x${this._keyObject.address.toLowerCase()}`;
+  }
+
+  get name () {
+    return this._name;
+  }
+
+  set name (name) {
+    this._name = name;
+
+    this._persist();
+  }
+
+  get meta () {
+    return JSON.stringify(this._meta);
+  }
+
+  set meta (meta) {
+    this._meta = JSON.parse(meta);
+
+    this._persist();
+  }
+
+  get uuid () {
+    return this._keyObject.id;
+  }
+
+  decryptPrivateKey (password) {
+    return keythereum.recover(Buffer.from(password), this._keyObject);
+  }
+
+  static fromPrivateKey (persist, key, password) {
+    const iv = keythereum.crypto.randomBytes(16);
+    const salt = keythereum.crypto.randomBytes(32);
+
+    // Keythereum will fail if `password` is an empty string
+    password = Buffer.from(password);
+
+    const keyObject = keythereum.dump(password, key, salt, iv);
+
+    const account = new Account(persist, { keyObject });
+
+    return account;
+  }
+
+  toJSON () {
+    return {
+      keyObject: this._keyObject,
+      name: this._name,
+      meta: this._meta
+    };
+  }
+}

js/src/api/local/accounts/accounts.js

@@ -0,0 +1,120 @@
+// Copyright 2015-2017 Parity Technologies (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 Account from './account';
+import localStore from 'store';
+import { debounce } from 'lodash';
+
+const NULL_ADDRESS = '0x0000000000000000000000000000000000000000';
+const LS_STORE_KEY = '_parity::localAccounts';
+
+export default class Accounts {
+  constructor (data = localStore.get(LS_STORE_KEY) || {}) {
+    const {
+      last = NULL_ADDRESS,
+      store = []
+    } = data;
+
+    this.persist = debounce(() => {
+      localStore.set(LS_STORE_KEY, this);
+    }, 100);
+
+    this._last = last;
+    this._store = store.map((data) => new Account(this.persist, data));
+  }
+
+  create (secret, password) {
+    const privateKey = Buffer.from(secret.slice(2), 'hex');
+    const account = Account.fromPrivateKey(this.persist, privateKey, password);
+
+    this._store.push(account);
+    this.lastAddress = account.address;
+
+    this.persist();
+
+    return account.address;
+  }
+
+  set lastAddress (value) {
+    this._last = value.toLowerCase();
+  }
+
+  get lastAddress () {
+    return this._last;
+  }
+
+  get (address) {
+    address = address.toLowerCase();
+
+    this.lastAddress = address;
+
+    const account = this._store.find((account) => account.address === address);
+
+    if (!account) {
+      throw new Error(`Account not found: ${address}`);
+    }
+
+    return account;
+  }
+
+  remove (address, password) {
+    address = address.toLowerCase();
+
+    const index = this._store.findIndex((account) => account.address === address);
+
+    if (index === -1) {
+      return false;
+    }
+
+    const account = this._store[index];
+
+    if (!account.isValidPassword(password)) {
+      console.log('invalid password');
+      return false;
+    }
+
+    if (address === this.lastAddress) {
+      this.lastAddress = NULL_ADDRESS;
+    }
+
+    this._store.splice(index, 1);
+
+    this.persist();
+
+    return true;
+  }
+
+  mapArray (mapper) {
+    return this._store.map(mapper);
+  }
+
+  mapObject (mapper) {
+    const result = {};
+
+    this._store.forEach((account) => {
+      result[account.address] = mapper(account);
+    });
+
+    return result;
+  }
+
+  toJSON () {
+    return {
+      last: this._last,
+      store: this._store
+    };
+  }
+}

js/src/api/local/accounts/index.js

@@ -0,0 +1,21 @@
+// Copyright 2015-2017 Parity Technologies (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 Accounts from './accounts';
+
+const accounts = new Accounts();
+
+export default accounts;

js/src/api/local/ethkey/index.js

@@ -0,0 +1,87 @@
+// Copyright 2015-2017 Parity Technologies (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 dictionary from './dictionary';
+
+// Allow a web worker in the browser, with a fallback for Node.js
+const hasWebWorkers = typeof Worker !== 'undefined';
+const KeyWorker = hasWebWorkers ? require('worker-loader!./worker')
+                                : require('./worker').KeyWorker;
+
+// Local accounts should never be used outside of the browser
+export let keythereum = null;
+
+if (hasWebWorkers) {
+  require('keythereum/dist/keythereum');
+
+  keythereum = window.keythereum;
+}
+
+export function phraseToAddress (phrase) {
+  return phraseToWallet(phrase).then((wallet) => wallet.address);
+}
+
+export function phraseToWallet (phrase) {
+  return new Promise((resolve, reject) => {
+    const worker = new KeyWorker();
+
+    worker.postMessage(phrase);
+    worker.onmessage = ({ data }) => {
+      resolve(data);
+    };
+  });
+}
+
+export function randomBytes (length) {
+  if (keythereum) {
+    return keythereum.crypto.randomBytes(length);
+  }
+
+  const buf = Buffer.alloc(length);
+
+  for (let i = 0; i < length; i++) {
+    buf[i] = Math.random() * 255;
+  }
+
+  return buf;
+}
+
+export function randomNumber (max) {
+  // Use 24 bits to avoid the integer becoming signed via bitshifts
+  const rand = randomBytes(3);
+
+  const integer = (rand[0] << 16) | (rand[1] << 8) | rand[2];
+
+  // floor to integer value via bitor 0
+  return ((integer / 0xFFFFFF) * max) | 0;
+}
+
+export function randomWord () {
+  // TODO mh: use better entropy
+  const index = randomNumber(dictionary.length);
+
+  return dictionary[index];
+}
+
+export function randomPhrase (length) {
+  const words = [];
+
+  while (length--) {
+    words.push(randomWord());
+  }
+
+  return words.join(' ');
+}

js/src/api/local/ethkey/index.spec.js

@@ -0,0 +1,95 @@
+// Copyright 2015-2017 Parity Technologies (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 dictionary from './dictionary';
+import {
+  phraseToAddress,
+  phraseToWallet,
+  randomNumber,
+  randomWord,
+  randomPhrase
+} from './';
+
+describe('api/local/ethkey', () => {
+  describe('randomNumber', () => {
+    it('generates numbers in range', () => {
+      for (let i = 0; i < 100; i++) {
+        const number = randomNumber(7777);
+
+        expect(number).to.be.at.least(0);
+        expect(number).to.be.below(7777);
+        expect(number % 1).to.be.equal(0);
+      }
+    });
+  });
+
+  describe('randomWord', () => {
+    it('generates a random word from the dictionary', () => {
+      const word = randomWord();
+
+      expect(dictionary.includes(word)).to.be.equal(true);
+    });
+  });
+
+  describe('randomPhrase', () => {
+    it('generates a random phrase from the dictionary', () => {
+      const phrase = randomPhrase(7).split(' ');
+
+      expect(phrase.length).to.be.equal(7);
+
+      phrase.forEach((word) => {
+        expect(dictionary.includes(word)).to.be.equal(true);
+      });
+    });
+  });
+
+  describe.skip('phraseToAddress', function () {
+    this.timeout(10000);
+
+    it('generates a valid address', () => {
+      const phrase = randomPhrase(12);
+
+      return phraseToAddress(phrase).then((address) => {
+        expect(address.length).to.be.equal(42);
+        expect(address.slice(0, 4)).to.be.equal('0x00');
+      });
+    });
+
+    it('generates valid address for empty phrase', () => {
+      return phraseToAddress('').then((address) => {
+        expect(address).to.be.equal('0x00a329c0648769a73afac7f9381e08fb43dbea72');
+      });
+    });
+  });
+
+  describe.skip('phraseToWallet', function () {
+    this.timeout(10000);
+
+    it('generates a valid wallet object', () => {
+      const phrase = randomPhrase(12);
+
+      return phraseToWallet(phrase).then((wallet) => {
+        expect(wallet.address.length).to.be.equal(42);
+        expect(wallet.secret.length).to.be.equal(66);
+        expect(wallet.public.length).to.be.equal(130);
+
+        expect(wallet.address.slice(0, 4)).to.be.equal('0x00');
+        expect(wallet.secret.slice(0, 2)).to.be.equal('0x');
+        expect(wallet.public.slice(0, 2)).to.be.equal('0x');
+      });
+    });
+  });
+});

js/src/api/local/ethkey/worker.js

@@ -0,0 +1,89 @@
+// Copyright 2015-2017 Parity Technologies (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 { keccak_256 as keccak256 } from 'js-sha3';
+import secp256k1 from 'secp256k1/js';
+
+// Stay compatible between environments
+if (typeof self !== 'object') {
+  const scope = typeof global === 'undefined' ? window : global;
+
+  scope.self = scope;
+}
+
+function bytesToHex (bytes) {
+  return '0x' + Array.from(bytes).map(n => ('0' + n.toString(16)).slice(-2)).join('');
+}
+
+// Logic ported from /ethkey/src/brain.rs
+function phraseToWallet (phrase) {
+  let secret = keccak256.array(phrase);
+
+  for (let i = 0; i < 16384; i++) {
+    secret = keccak256.array(secret);
+  }
+
+  while (true) {
+    secret = keccak256.array(secret);
+
+    const secretBuf = Buffer.from(secret);
+
+    if (secp256k1.privateKeyVerify(secretBuf)) {
+      // No compression, slice out last 64 bytes
+      const publicBuf = secp256k1.publicKeyCreate(secretBuf, false).slice(-64);
+      const address = keccak256.array(publicBuf).slice(12);
+
+      if (address[0] !== 0) {
+        continue;
+      }
+
+      const wallet = {
+        secret: bytesToHex(secretBuf),
+        public: bytesToHex(publicBuf),
+        address: bytesToHex(address)
+      };
+
+      return wallet;
+    }
+  }
+}
+
+self.onmessage = function ({ data }) {
+  const wallet = phraseToWallet(data);
+
+  postMessage(wallet);
+  close();
+};
+
+// Emulate a web worker in Node.js
+class KeyWorker {
+  postMessage (data) {
+    // Force async
+    setTimeout(() => {
+      const wallet = phraseToWallet(data);
+
+      this.onmessage({ data: wallet });
+    }, 0);
+  }
+
+  onmessage (event) {
+    // no-op to be overriden
+  }
+}
+
+if (exports != null) {
+  exports.KeyWorker = KeyWorker;
+}

js/src/api/local/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015-2017 Parity Technologies (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 LocalAccountsMiddleware from './middleware';

js/src/api/local/middleware.js

@@ -0,0 +1,173 @@
+// Copyright 2015-2017 Parity Technologies (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 EthereumTx from 'ethereumjs-tx';
+import accounts from './accounts';
+import transactions from './transactions';
+import { Middleware } from '../transport';
+import { inNumber16 } from '../format/input';
+import { phraseToWallet, phraseToAddress, randomPhrase } from './ethkey';
+
+export default class LocalAccountsMiddleware extends Middleware {
+  // Maps transaction requests to transaction hashes.
+  // This allows the locally-signed transactions to emulate the signer.
+  transactionHashes = {};
+  transactions = {};
+
+  // Current transaction id. This doesn't need to be stored, as it's
+  // only relevant for the current the session.
+  transactionId = 1;
+
+  constructor (transport) {
+    super(transport);
+
+    const register = this.register.bind(this);
+
+    register('eth_accounts', () => {
+      return accounts.mapArray((account) => account.address);
+    });
+
+    register('eth_coinbase', () => {
+      return accounts.lastAddress;
+    });
+
+    register('parity_accountsInfo', () => {
+      return accounts.mapObject(({ name }) => {
+        return { name };
+      });
+    });
+
+    register('parity_allAccountsInfo', () => {
+      return accounts.mapObject(({ name, meta, uuid }) => {
+        return { name, meta, uuid };
+      });
+    });
+
+    register('parity_checkRequest', ([id]) => {
+      return transactions.hash(id) || Promise.resolve(null);
+    });
+
+    register('parity_defaultAccount', () => {
+      return accounts.lastAddress;
+    });
+
+    register('parity_generateSecretPhrase', () => {
+      return randomPhrase(12);
+    });
+
+    register('parity_getNewDappsAddresses', () => {
+      return [];
+    });
+
+    register('parity_hardwareAccountsInfo', () => {
+      return {};
+    });
+
+    register('parity_newAccountFromPhrase', ([phrase, password]) => {
+      return phraseToWallet(phrase)
+        .then((wallet) => {
+          return accounts.create(wallet.secret, password);
+        });
+    });
+
+    register('parity_setAccountMeta', ([address, meta]) => {
+      accounts.get(address).meta = meta;
+
+      return true;
+    });
+
+    register('parity_setAccountName', ([address, name]) => {
+      accounts.get(address).name = name;
+
+      return true;
+    });
+
+    register('parity_postTransaction', ([tx]) => {
+      if (!tx.from) {
+        tx.from = accounts.lastAddress;
+      }
+
+      tx.nonce = null;
+      tx.condition = null;
+
+      return transactions.add(tx);
+    });
+
+    register('parity_phraseToAddress', ([phrase]) => {
+      return phraseToAddress(phrase);
+    });
+
+    register('parity_useLocalAccounts', () => {
+      return true;
+    });
+
+    register('parity_listGethAccounts', () => {
+      return [];
+    });
+
+    register('parity_listRecentDapps', () => {
+      return {};
+    });
+
+    register('parity_killAccount', ([address, password]) => {
+      return accounts.remove(address, password);
+    });
+
+    register('signer_confirmRequest', ([id, modify, password]) => {
+      const {
+        gasPrice,
+        gas: gasLimit,
+        from,
+        to,
+        value,
+        data
+      } = Object.assign(transactions.get(id), modify);
+
+      return this
+        .rpcRequest('parity_nextNonce', [from])
+        .then((nonce) => {
+          const tx = new EthereumTx({
+            nonce,
+            to,
+            data,
+            gasLimit: inNumber16(gasLimit),
+            gasPrice: inNumber16(gasPrice),
+            value: inNumber16(value)
+          });
+          const account = accounts.get(from);
+
+          tx.sign(account.decryptPrivateKey(password));
+
+          const serializedTx = `0x${tx.serialize().toString('hex')}`;
+
+          return this.rpcRequest('eth_sendRawTransaction', [serializedTx]);
+        })
+        .then((hash) => {
+          transactions.confirm(id, hash);
+
+          return {};
+        });
+    });
+
+    register('signer_rejectRequest', ([id]) => {
+      return transactions.reject(id);
+    });
+
+    register('signer_requestsToConfirm', () => {
+      return transactions.requestsToConfirm();
+    });
+  }
+}

js/src/api/local/transactions.js

@@ -0,0 +1,123 @@
+// Copyright 2015-2017 Parity Technologies (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 { toHex } from '../util/format';
+import { TransportError } from '../transport';
+
+const AWAITING = Symbol('awaiting');
+const CONFIRMED = Symbol('confirmed');
+const REJECTED = Symbol('rejected');
+
+class Transactions {
+  constructor () {
+    this.reset();
+  }
+
+  // should only really be needed in the constructor and tests
+  reset () {
+    this._id = 1;
+    this._states = {};
+  }
+
+  nextId () {
+    return toHex(this._id++);
+  }
+
+  add (tx) {
+    const id = this.nextId();
+
+    this._states[id] = {
+      status: AWAITING,
+      transaction: tx
+    };
+
+    return id;
+  }
+
+  get (id) {
+    const state = this._states[id];
+
+    if (!state || state.status !== AWAITING) {
+      return null;
+    }
+
+    return state.transaction;
+  }
+
+  hash (id) {
+    const state = this._states[id];
+
+    if (!state) {
+      return null;
+    }
+
+    switch (state.status) {
+      case REJECTED:
+        throw TransportError.requestRejected();
+      case CONFIRMED:
+        return state.hash;
+      default:
+        return null;
+    }
+  }
+
+  confirm (id, hash) {
+    const state = this._states[id];
+
+    if (!state || state.status !== AWAITING) {
+      throw new Error('Trying to confirm an invalid transaction');
+    }
+
+    state.hash = hash;
+    state.status = CONFIRMED;
+  }
+
+  reject (id) {
+    const state = this._states[id];
+
+    if (!state) {
+      return false;
+    }
+
+    state.status = REJECTED;
+
+    return true;
+  }
+
+  requestsToConfirm () {
+    const result = [];
+
+    Object.keys(this._states).forEach((id) => {
+      const state = this._states[id];
+
+      if (state.status === AWAITING) {
+        result.push({
+          id,
+          origin: {
+            signer: '0x0'
+          },
+          payload: {
+            sendTransaction: state.transaction
+          }
+        });
+      }
+    });
+
+    return result;
+  }
+}
+
+export default new Transactions();

js/src/api/local/transactions.spec.js

@@ -0,0 +1,68 @@
+// Copyright 2015-2017 Parity Technologies (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 transactions from './transactions';
+import { TransportError } from '../transport/error';
+
+const DUMMY_TX = 'dummy';
+
+describe('api/local/transactions', () => {
+  beforeEach(() => {
+    transactions.reset();
+  });
+
+  it('can store transactions', () => {
+    const id1 = transactions.add(DUMMY_TX);
+    const id2 = transactions.add(DUMMY_TX);
+    const requests = transactions.requestsToConfirm();
+
+    expect(id1).to.be.equal('0x1');
+    expect(id2).to.be.equal('0x2');
+    expect(requests.length).to.be.equal(2);
+    expect(requests[0].id).to.be.equal(id1);
+    expect(requests[1].id).to.be.equal(id2);
+    expect(requests[0].payload.sendTransaction).to.be.equal(DUMMY_TX);
+    expect(requests[1].payload.sendTransaction).to.be.equal(DUMMY_TX);
+  });
+
+  it('can confirm transactions', () => {
+    const id1 = transactions.add(DUMMY_TX);
+    const id2 = transactions.add(DUMMY_TX);
+
+    const hash1 = '0x1111111111111111111111111111111111111111';
+    const hash2 = '0x2222222222222222222222222222222222222222';
+
+    transactions.confirm(id1, hash1);
+    transactions.confirm(id2, hash2);
+
+    const requests = transactions.requestsToConfirm();
+
+    expect(requests.length).to.be.equal(0);
+    expect(transactions.hash(id1)).to.be.equal(hash1);
+    expect(transactions.hash(id2)).to.be.equal(hash2);
+  });
+
+  it('can reject transactions', () => {
+    const id = transactions.add(DUMMY_TX);
+
+    transactions.reject(id);
+
+    const requests = transactions.requestsToConfirm();
+
+    expect(requests.length).to.be.equal(0);
+    expect(() => transactions.hash(id)).to.throw(TransportError);
+  });
+});

js/src/api/transport/error.js

@@ -42,6 +42,10 @@ export const ERROR_CODES = {
 };
 
 export default class TransportError extends ExtendableError {
+  static requestRejected (method = null) {
+    return new TransportError(method, ERROR_CODES.REQUEST_REJECTED, 'Request has been rejected.');
+  }
+
   constructor (method, code, message) {
     const m = `${method}: ${code}: ${message}`;
 

js/src/api/transport/http/http.js

@@ -46,7 +46,7 @@ export default class Http extends JsonRpcBase {
     };
   }
 
-  execute (method, ...params) {
+  _execute (method, params) {
     const request = this._encodeOptions(method, params);
 
     return fetch(this._url, request)

js/src/api/transport/index.js

@@ -16,4 +16,5 @@
 
 export Http from './http';
 export Ws from './ws';
-export TransportError from './error.js';
+export TransportError from './error';
+export Middleware from './middleware';

js/src/api/transport/jsonRpcBase.js

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import EventEmitter from 'eventemitter3';
+import { Logging } from '../subscriptions';
 
 export default class JsonRpcBase extends EventEmitter {
   constructor () {
@@ -23,6 +24,7 @@ export default class JsonRpcBase extends EventEmitter {
     this._id = 1;
     this._debug = false;
     this._connected = false;
+    this._middlewareList = Promise.resolve([]);
   }
 
   encode (method, params) {
@@ -36,6 +38,65 @@ export default class JsonRpcBase extends EventEmitter {
     return json;
   }
 
+  addMiddleware (middleware) {
+    this._middlewareList = Promise
+      .all([
+        middleware,
+        this._middlewareList
+      ])
+      .then(([middleware, middlewareList]) => {
+        // Do nothing if `handlerPromise` resolves to a null-y value.
+        if (middleware == null) {
+          return middlewareList;
+        }
+
+        // don't mutate the original array
+        return middlewareList.concat([middleware]);
+      });
+  }
+
+  _wrapSuccessResult (result) {
+    return {
+      id: this._id,
+      jsonrpc: '2.0',
+      result
+    };
+  }
+
+  _wrapErrorResult (error) {
+    return {
+      id: this._id,
+      jsonrpc: '2.0',
+      error: {
+        code: error.code,
+        message: error.text
+      }
+    };
+  }
+
+  execute (method, ...params) {
+    return this._middlewareList.then((middlewareList) => {
+      for (const middleware of middlewareList) {
+        const res = middleware.handle(method, params);
+
+        if (res != null) {
+          const result = this._wrapSuccessResult(res);
+          const json = this.encode(method, params);
+
+          Logging.send(method, params, { json, result });
+
+          return res;
+        }
+      }
+
+      return this._execute(method, params);
+    });
+  }
+
+  _execute () {
+    throw new Error('Missing implementation of JsonRpcBase#_execute');
+  }
+
   _setConnected () {
     if (!this._connected) {
       this._connected = true;

js/src/api/transport/middleware.js

@@ -0,0 +1,42 @@
+// Copyright 2015-2017 Parity Technologies (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 class Middleware {
+  constructor (transport) {
+    this._transport = transport;
+    this._handlers = {};
+  }
+
+  register (method, handler) {
+    this._handlers[method] = handler;
+  }
+
+  handle (method, params) {
+    const handler = this._handlers[method];
+
+    if (handler != null) {
+      const response = handler(params);
+
+      return response;
+    }
+
+    return null;
+  }
+
+  rpcRequest (method, params) {
+    return this._transport._execute(method, params);
+  }
+}

js/src/api/transport/middleware.spec.js

@@ -0,0 +1,58 @@
+// Copyright 2015-2017 Parity Technologies (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 Middleware from './middleware';
+import JsonRpcBase from './jsonRpcBase';
+
+const MOCKED = 'mocked!';
+
+class MockTransport extends JsonRpcBase {
+  _execute () {
+    return Promise.resolve(MOCKED);
+  }
+}
+
+describe('api/transport/Middleware', () => {
+  let middleware;
+  let transport;
+
+  beforeEach(() => {
+    transport = new MockTransport();
+    middleware = new Middleware(transport);
+
+    middleware.register('mock_rpc', ([num]) => num);
+    middleware.register('mock_null', () => null);
+    transport.addMiddleware(middleware);
+  });
+
+  it('Routes requests to middleware', () => {
+    return transport.execute('mock_rpc', 100).then((num) => {
+      expect(num).to.be.equal(100);
+    });
+  });
+
+  it('Passes non-mocked requests through', () => {
+    return transport.execute('not_moced', 200).then((result) => {
+      expect(result).to.be.equal(MOCKED);
+    });
+  });
+
+  it('Passes mocked requests through, if middleware returns null', () => {
+    return transport.execute('mock_null', 300).then((result) => {
+      expect(result).to.be.equal(MOCKED);
+    });
+  });
+});

js/src/api/transport/ws/ws.js

@@ -244,7 +244,7 @@ export default class Ws extends JsonRpcBase {
     message.timestamp = Date.now();
   }
 
-  execute (method, ...params) {
+  _execute (method, params) {
     return new Promise((resolve, reject) => {
       const id = this.id;
       const json = this.encode(method, params);

js/webpack/libraries.js

@@ -56,6 +56,11 @@ module.exports = {
           'babel-loader?cacheDirectory=true'
         ]
       },
+      {
+        test: /\.js$/,
+        include: /node_modules\/ethereumjs-tx/,
+        use: 'babel-loader'
+      },
       {
         test: /\.json$/,
         use: [ 'json-loader' ]

parity/cli/config.full.toml

@@ -4,6 +4,7 @@ mode_timeout = 300
 mode_alarm = 3600
 auto_update = "none"
 release_track = "current"
+public_node = false
 no_download = false
 no_consensus = false
 

parity/cli/mod.rs

@@ -88,6 +88,7 @@ usage! {
 		flag_mode_alarm: u64 = 3600u64, or |c: &Config| otry!(c.parity).mode_alarm.clone(),
 		flag_auto_update: String = "critical", or |c: &Config| otry!(c.parity).auto_update.clone(),
 		flag_release_track: String = "current", or |c: &Config| otry!(c.parity).release_track.clone(),
+		flag_public_node: bool = false, or |c: &Config| otry!(c.parity).public_node.clone(),
 		flag_no_download: bool = false, or |c: &Config| otry!(c.parity).no_download.clone(),
 		flag_no_consensus: bool = false, or |c: &Config| otry!(c.parity).no_consensus.clone(),
 		flag_chain: String = "foundation", or |c: &Config| otry!(c.parity).chain.clone(),
@@ -365,6 +366,7 @@ struct Operating {
 	mode_alarm: Option<u64>,
 	auto_update: Option<String>,
 	release_track: Option<String>,
+	public_node: Option<bool>,
 	no_download: Option<bool>,
 	no_consensus: Option<bool>,
 	chain: Option<String>,
@@ -623,6 +625,7 @@ mod tests {
 			flag_mode_alarm: 3600u64,
 			flag_auto_update: "none".into(),
 			flag_release_track: "current".into(),
+			flag_public_node: false,
 			flag_no_download: false,
 			flag_no_consensus: false,
 			flag_chain: "xyz".into(),
@@ -825,6 +828,7 @@ mod tests {
 				mode_alarm: Some(10u64),
 				auto_update: None,
 				release_track: None,
+				public_node: None,
 				no_download: None,
 				no_consensus: None,
 				chain: Some("./chain.json".into()),

parity/cli/usage.txt

@@ -48,6 +48,9 @@ Operating Options:
                                  testing - Testing releases (do not use).
                                  current - Whatever track this executable was
                                  released on (default: {flag_release_track}).
+  --public-node                  Start Parity as a public web server. Account storage
+                                 and transaction signing will be delegated to the UI.
+                                 (default: {flag_public_node}).
   --no-download                  Normally new releases will be downloaded ready for
                                  updating. This disables it. Not recommended.
                                  (default: {flag_no_download}).

parity/configuration.rs

@@ -128,6 +128,7 @@ impl Configuration {
 			Some(true) if pruning == Pruning::Specific(Algorithm::Archive) => writeln!(&mut stderr(), "Warning: Warp Sync is disabled because pruning mode is set to archive").expect("Error writing to stderr"),
 			_ => {},
 		};
+		let public_node = self.args.flag_public_node;
 		let warp_sync = !self.args.flag_no_warp && fat_db != Switch::On && tracing != Switch::On && pruning != Pruning::Specific(Algorithm::Archive);
 		let geth_compatibility = self.args.flag_geth;
 		let ui_address = self.ui_port().map(|port| (self.ui_interface(), port));
@@ -360,6 +361,7 @@ impl Configuration {
 				wal: wal,
 				vm_type: vm_type,
 				warp_sync: warp_sync,
+				public_node: public_node,
 				geth_compatibility: geth_compatibility,
 				ui_address: ui_address,
 				net_settings: self.network_settings(),
@@ -709,14 +711,26 @@ impl Configuration {
 	}
 
 	fn rpc_apis(&self) -> String {
-		let mut apis = self.args.flag_rpcapi.clone().unwrap_or(self.args.flag_jsonrpc_apis.clone());
+		let mut apis: Vec<&str> = self.args.flag_rpcapi
+			.as_ref()
+			.unwrap_or(&self.args.flag_jsonrpc_apis)
+			.split(",")
+			.collect();
+
 		if self.args.flag_geth {
-			if !apis.is_empty() {
+			apis.push("personal");
-				apis.push_str(",");
-			}
-			apis.push_str("personal");
 		}
-		apis
+
+		if self.args.flag_public_node {
+			apis.retain(|api| {
+				match *api {
+					"eth" | "net" | "parity" | "rpc" | "web3" => true,
+					_ => false
+				}
+			});
+		}
+
+		apis.join(",")
 	}
 
 	fn cors(cors: Option<&String>) -> Option<Vec<String>> {
@@ -1167,6 +1181,7 @@ mod tests {
 			ipc_conf: Default::default(),
 			net_conf: default_network_config(),
 			network_id: None,
+			public_node: false,
 			warp_sync: true,
 			acc_conf: Default::default(),
 			gas_pricer: Default::default(),

parity/rpc_apis.rs

@@ -118,7 +118,7 @@ pub struct Dependencies {
 	pub snapshot: Arc<SnapshotService>,
 	pub sync: Arc<SyncProvider>,
 	pub net: Arc<ManageNetwork>,
-	pub secret_store: Arc<AccountProvider>,
+	pub secret_store: Option<Arc<AccountProvider>>,
 	pub miner: Arc<Miner>,
 	pub external_miner: Arc<ExternalMiner>,
 	pub logger: Arc<RotatingLogger>,

parity/run.rs

@@ -81,6 +81,7 @@ pub struct RunCmd {
 	pub net_conf: NetworkConfiguration,
 	pub network_id: Option<u64>,
 	pub warp_sync: bool,
+	pub public_node: bool,
 	pub acc_conf: AccountsConfig,
 	pub gas_pricer: GasPricerConfig,
 	pub miner_extras: MinerExtras,
@@ -407,6 +408,10 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 	// set up dependencies for rpc servers
 	let rpc_stats = Arc::new(informant::RpcStats::default());
 	let signer_path = cmd.signer_conf.signer_path.clone();
+	let secret_store = match cmd.public_node {
+		true => None,
+		false => Some(account_provider.clone())
+	};
 	let deps_for_rpc_apis = Arc::new(rpc_apis::Dependencies {
 		signer_service: Arc::new(rpc_apis::SignerService::new(move || {
 			signer::generate_new_token(signer_path.clone()).map_err(|e| format!("{:?}", e))
@@ -415,7 +420,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		client: client.clone(),
 		sync: sync_provider.clone(),
 		net: manage_network.clone(),
-		secret_store: account_provider.clone(),
+		secret_store: secret_store,
 		miner: miner.clone(),
 		external_miner: external_miner.clone(),
 		logger: logger.clone(),

rpc/src/v1/helpers/accounts.rs

@@ -0,0 +1,27 @@
+// Copyright 2015-2017 Parity Technologies (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/>.
+
+use std::sync::{Arc, Weak};
+use ethcore::account_provider::AccountProvider;
+use jsonrpc_core::Error;
+use v1::helpers::errors;
+
+pub fn unwrap_provider(provider: &Option<Weak<AccountProvider>>) -> Result<Arc<AccountProvider>, Error> {
+	match *provider {
+		Some(ref weak) => weak.upgrade().ok_or_else(Error::internal_error),
+		None => Err(errors::public_unsupported(None)),
+	}
+}

rpc/src/v1/helpers/errors.rs

@@ -65,6 +65,14 @@ pub fn light_unimplemented(details: Option<String>) -> Error {
 	}
 }
 
+pub fn public_unsupported(details: Option<String>) -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::UNSUPPORTED_REQUEST),
+		message: "Method disallowed when running parity as a public node.".into(),
+		data: details.map(Value::String),
+	}
+}
+
 pub fn request_not_found() -> Error {
 	Error {
 		code: ErrorCode::ServerError(codes::REQUEST_NOT_FOUND),

rpc/src/v1/helpers/mod.rs

@@ -17,6 +17,7 @@
 #[macro_use]
 pub mod errors;
 
+pub mod accounts;
 pub mod block_import;
 pub mod dispatch;
 pub mod fake_sign;

rpc/src/v1/impls/eth.rs

@@ -46,6 +46,7 @@ use jsonrpc_macros::Trailing;
 use v1::helpers::{errors, limit_logs, fake_sign};
 use v1::helpers::dispatch::{Dispatcher, FullDispatcher, default_gas_price};
 use v1::helpers::block_import::is_major_importing;
+use v1::helpers::accounts::unwrap_provider;
 use v1::traits::Eth;
 use v1::types::{
 	RichBlock, Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo,
@@ -97,7 +98,7 @@ pub struct EthClient<C, SN: ?Sized, S: ?Sized, M, EM> where
 	client: Weak<C>,
 	snapshot: Weak<SN>,
 	sync: Weak<S>,
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	miner: Weak<M>,
 	external_miner: Arc<EM>,
 	seed_compute: Mutex<SeedHashCompute>,
@@ -116,7 +117,7 @@ impl<C, SN: ?Sized, S: ?Sized, M, EM> EthClient<C, SN, S, M, EM> where
 		client: &Arc<C>,
 		snapshot: &Arc<SN>,
 		sync: &Arc<S>,
-		accounts: &Arc<AccountProvider>,
+		accounts: &Option<Arc<AccountProvider>>,
 		miner: &Arc<M>,
 		em: &Arc<EM>,
 		options: EthClientOptions
@@ -126,13 +127,19 @@ impl<C, SN: ?Sized, S: ?Sized, M, EM> EthClient<C, SN, S, M, EM> where
 			snapshot: Arc::downgrade(snapshot),
 			sync: Arc::downgrade(sync),
 			miner: Arc::downgrade(miner),
-			accounts: Arc::downgrade(accounts),
+			accounts: accounts.as_ref().map(Arc::downgrade),
 			external_miner: em.clone(),
 			seed_compute: Mutex::new(SeedHashCompute::new()),
 			options: options,
 		}
 	}
 
+	/// Attempt to get the `Arc<AccountProvider>`, errors if provider was not
+	/// set, or if upgrading the weak reference failed.
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
+
 	fn block(&self, id: BlockId, include_txs: bool) -> Result<Option<RichBlock>, Error> {
 		let client = take_weak!(self.client);
 		match (client.block(id.clone()), client.block_total_difficulty(id)) {
@@ -223,7 +230,7 @@ impl<C, SN: ?Sized, S: ?Sized, M, EM> EthClient<C, SN, S, M, EM> where
 	}
 
 	fn dapp_accounts(&self, dapp: DappId) -> Result<Vec<H160>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		store
 			.note_dapp_used(dapp.clone())
 			.and_then(|_| store.dapp_addresses(dapp))

rpc/src/v1/impls/light/parity.rs

@@ -40,7 +40,7 @@ use v1::types::{
 	TransactionStats, LocalTransactionStatus,
 	BlockNumber, ConsensusCapability, VersionInfo,
 	OperationsInfo, DappId, ChainStatus,
-	AccountInfo, HwAccountInfo
+	AccountInfo, HwAccountInfo,
 };
 
 /// Parity implementation for light client.

rpc/src/v1/impls/parity.rs

@@ -37,6 +37,7 @@ use updater::{Service as UpdateService};
 use jsonrpc_core::Error;
 use jsonrpc_macros::Trailing;
 use v1::helpers::{errors, SigningQueue, SignerService, NetworkSettings};
+use v1::helpers::accounts::unwrap_provider;
 use v1::helpers::dispatch::DEFAULT_MAC;
 use v1::metadata::Metadata;
 use v1::traits::Parity;
@@ -46,7 +47,7 @@ use v1::types::{
 	TransactionStats, LocalTransactionStatus,
 	BlockNumber, ConsensusCapability, VersionInfo,
 	OperationsInfo, DappId, ChainStatus,
-	AccountInfo, HwAccountInfo
+	AccountInfo, HwAccountInfo,
 };
 
 /// Parity implementation.
@@ -61,7 +62,7 @@ pub struct ParityClient<C, M, S: ?Sized, U> where
 	sync: Weak<S>,
 	updater: Weak<U>,
 	net: Weak<ManageNetwork>,
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	logger: Arc<RotatingLogger>,
 	settings: Arc<NetworkSettings>,
 	signer: Option<Arc<SignerService>>,
@@ -82,7 +83,7 @@ impl<C, M, S: ?Sized, U> ParityClient<C, M, S, U> where
 		sync: &Arc<S>,
 		updater: &Arc<U>,
 		net: &Arc<ManageNetwork>,
-		store: &Arc<AccountProvider>,
+		store: &Option<Arc<AccountProvider>>,
 		logger: Arc<RotatingLogger>,
 		settings: Arc<NetworkSettings>,
 		signer: Option<Arc<SignerService>>,
@@ -95,7 +96,7 @@ impl<C, M, S: ?Sized, U> ParityClient<C, M, S, U> where
 			sync: Arc::downgrade(sync),
 			updater: Arc::downgrade(updater),
 			net: Arc::downgrade(net),
-			accounts: Arc::downgrade(store),
+			accounts: store.as_ref().map(Arc::downgrade),
 			logger: logger,
 			settings: settings,
 			signer: signer,
@@ -103,6 +104,12 @@ impl<C, M, S: ?Sized, U> ParityClient<C, M, S, U> where
 			dapps_port: dapps_port,
 		}
 	}
+
+	/// Attempt to get the `Arc<AccountProvider>`, errors if provider was not
+	/// set, or if upgrading the weak reference failed.
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
 }
 
 impl<C, M, S: ?Sized, U> Parity for ParityClient<C, M, S, U> where
@@ -116,7 +123,7 @@ impl<C, M, S: ?Sized, U> Parity for ParityClient<C, M, S, U> where
 	fn accounts_info(&self, dapp: Trailing<DappId>) -> Result<BTreeMap<H160, AccountInfo>, Error> {
 		let dapp = dapp.0;
 
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let dapp_accounts = store
 			.note_dapp_used(dapp.clone().into())
 			.and_then(|_| store.dapp_addresses(dapp.into()))
@@ -136,7 +143,7 @@ impl<C, M, S: ?Sized, U> Parity for ParityClient<C, M, S, U> where
 	}
 
 	fn hardware_accounts_info(&self) -> Result<BTreeMap<H160, HwAccountInfo>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let info = store.hardware_accounts_info().map_err(|e| errors::account("Could not fetch account info.", e))?;
 		Ok(info
 			.into_iter()
@@ -148,7 +155,7 @@ impl<C, M, S: ?Sized, U> Parity for ParityClient<C, M, S, U> where
 	fn default_account(&self, meta: Self::Metadata) -> BoxFuture<H160, Error> {
 		let dapp_id = meta.dapp_id();
 		future::ok(
-			take_weakf!(self.accounts)
+			try_bf!(self.account_provider())
 				.dapp_default_address(dapp_id.into())
 				.map(Into::into)
 				.ok()
@@ -376,9 +383,13 @@ impl<C, M, S: ?Sized, U> Parity for ParityClient<C, M, S, U> where
 	fn node_kind(&self) -> Result<::v1::types::NodeKind, Error> {
 		use ::v1::types::{NodeKind, Availability, Capability};
 
-		// TODO [maciej]: public availability flag.
+		let availability = match self.accounts {
+			Some(_) => Availability::Personal,
+			None => Availability::Public
+		};
+
 		Ok(NodeKind {
-			availability: Availability::Personal,
+			availability: availability,
 			capability: Capability::Full,
 		})
 	}

rpc/src/v1/impls/parity_accounts.rs

@@ -25,26 +25,33 @@ use ethcore::account_provider::AccountProvider;
 
 use jsonrpc_core::Error;
 use v1::helpers::errors;
+use v1::helpers::accounts::unwrap_provider;
 use v1::traits::ParityAccounts;
 use v1::types::{H160 as RpcH160, H256 as RpcH256, DappId, Derive, DeriveHierarchical, DeriveHash};
 
 /// Account management (personal) rpc implementation.
 pub struct ParityAccountsClient {
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 }
 
 impl ParityAccountsClient {
 	/// Creates new PersonalClient
-	pub fn new(store: &Arc<AccountProvider>) -> Self {
+	pub fn new(store: &Option<Arc<AccountProvider>>) -> Self {
 		ParityAccountsClient {
-			accounts: Arc::downgrade(store),
+			accounts: store.as_ref().map(Arc::downgrade),
 		}
 	}
+
+	/// Attempt to get the `Arc<AccountProvider>`, errors if provider was not
+	/// set, or if upgrading the weak reference failed.
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
 }
 
 impl ParityAccounts for ParityAccountsClient {
 	fn all_accounts_info(&self) -> Result<BTreeMap<RpcH160, BTreeMap<String, String>>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let info = store.accounts_info().map_err(|e| errors::account("Could not fetch account info.", e))?;
 		let other = store.addresses_info();
 
@@ -66,7 +73,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn new_account_from_phrase(&self, phrase: String, pass: String) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		let brain = Brain::new(phrase).generate().unwrap();
 		store.insert_account(brain.secret().clone(), &pass)
@@ -75,7 +82,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn new_account_from_wallet(&self, json: String, pass: String) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.import_presale(json.as_bytes(), &pass)
 			.or_else(|_| store.import_wallet(json.as_bytes(), &pass))
@@ -84,7 +91,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn new_account_from_secret(&self, secret: RpcH256, pass: String) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		let secret = Secret::from_slice(&secret.0)
 			.map_err(|e| errors::account("Could not create account.", e))?;
@@ -96,14 +103,14 @@ impl ParityAccounts for ParityAccountsClient {
 	fn test_password(&self, account: RpcH160, password: String) -> Result<bool, Error> {
 		let account: Address = account.into();
 
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.test_password(&account, &password)
 			.map_err(|e| errors::account("Could not fetch account info.", e))
 	}
 
 	fn change_password(&self, account: RpcH160, password: String, new_password: String) -> Result<bool, Error> {
 		let account: Address = account.into();
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.change_password(&account, password, new_password)
 			.map(|_| true)
 			.map_err(|e| errors::account("Could not fetch account info.", e))
@@ -111,14 +118,14 @@ impl ParityAccounts for ParityAccountsClient {
 
 	fn kill_account(&self, account: RpcH160, password: String) -> Result<bool, Error> {
 		let account: Address = account.into();
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.kill_account(&account, &password)
 			.map(|_| true)
 			.map_err(|e| errors::account("Could not delete account.", e))
 	}
 
 	fn remove_address(&self, addr: RpcH160) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let addr: Address = addr.into();
 
 		store.remove_address(addr);
@@ -126,7 +133,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_account_name(&self, addr: RpcH160, name: String) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let addr: Address = addr.into();
 
 		store.set_account_name(addr.clone(), name.clone())
@@ -135,7 +142,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_account_meta(&self, addr: RpcH160, meta: String) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let addr: Address = addr.into();
 
 		store.set_account_meta(addr.clone(), meta.clone())
@@ -144,7 +151,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_dapp_addresses(&self, dapp: DappId, addresses: Option<Vec<RpcH160>>) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.set_dapp_addresses(dapp.into(), addresses.map(into_vec))
 			.map_err(|e| errors::account("Couldn't set dapp addresses.", e))
@@ -152,7 +159,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn dapp_addresses(&self, dapp: DappId) -> Result<Vec<RpcH160>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.dapp_addresses(dapp.into())
 			.map_err(|e| errors::account("Couldn't get dapp addresses.", e))
@@ -160,7 +167,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_dapp_default_address(&self, dapp: DappId, address: RpcH160) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.set_dapp_default_address(dapp.into(), address.into())
 			.map_err(|e| errors::account("Couldn't set dapp default address.", e))
@@ -168,7 +175,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn dapp_default_address(&self, dapp: DappId) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.dapp_default_address(dapp.into())
 			.map_err(|e| errors::account("Couldn't get dapp default address.", e))
@@ -176,7 +183,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_new_dapps_addresses(&self, addresses: Option<Vec<RpcH160>>) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store
 			.set_new_dapps_addresses(addresses.map(into_vec))
@@ -185,7 +192,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn new_dapps_addresses(&self) -> Result<Option<Vec<RpcH160>>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.new_dapps_addresses()
 			.map_err(|e| errors::account("Couldn't get dapps addresses.", e))
@@ -193,7 +200,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn set_new_dapps_default_address(&self, address: RpcH160) -> Result<bool, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.set_new_dapps_default_address(address.into())
 			.map_err(|e| errors::account("Couldn't set new dapps default address.", e))
@@ -201,7 +208,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn new_dapps_default_address(&self) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.new_dapps_default_address()
 			.map_err(|e| errors::account("Couldn't get new dapps default address.", e))
@@ -209,7 +216,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn recent_dapps(&self) -> Result<BTreeMap<DappId, u64>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.recent_dapps()
 			.map_err(|e| errors::account("Couldn't get recent dapps.", e))
@@ -217,7 +224,7 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn import_geth_accounts(&self, addresses: Vec<RpcH160>) -> Result<Vec<RpcH160>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store
 			.import_geth_accounts(into_vec(addresses), false)
@@ -226,66 +233,66 @@ impl ParityAccounts for ParityAccountsClient {
 	}
 
 	fn geth_accounts(&self) -> Result<Vec<RpcH160>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		Ok(into_vec(store.list_geth_accounts(false)))
 	}
 
 	fn create_vault(&self, name: String, password: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.create_vault(&name, &password)
 			.map_err(|e| errors::account("Could not create vault.", e))
 			.map(|_| true)
 	}
 
 	fn open_vault(&self, name: String, password: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.open_vault(&name, &password)
 			.map_err(|e| errors::account("Could not open vault.", e))
 			.map(|_| true)
 	}
 
 	fn close_vault(&self, name: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.close_vault(&name)
 			.map_err(|e| errors::account("Could not close vault.", e))
 			.map(|_| true)
 	}
 
 	fn list_vaults(&self) -> Result<Vec<String>, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.list_vaults()
 			.map_err(|e| errors::account("Could not list vaults.", e))
 	}
 
 	fn list_opened_vaults(&self) -> Result<Vec<String>, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.list_opened_vaults()
 			.map_err(|e| errors::account("Could not list vaults.", e))
 	}
 
 	fn change_vault_password(&self, name: String, new_password: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.change_vault_password(&name, &new_password)
 			.map_err(|e| errors::account("Could not change vault password.", e))
 			.map(|_| true)
 	}
 
 	fn change_vault(&self, address: RpcH160, new_vault: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.change_vault(address.into(), &new_vault)
 			.map_err(|e| errors::account("Could not change vault.", e))
 			.map(|_| true)
 	}
 
 	fn get_vault_meta(&self, name: String) -> Result<String, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.get_vault_meta(&name)
 			.map_err(|e| errors::account("Could not get vault metadata.", e))
 	}
 
 	fn set_vault_meta(&self, name: String, meta: String) -> Result<bool, Error> {
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.set_vault_meta(&name, &meta)
 			.map_err(|e| errors::account("Could not update vault metadata.", e))
 			.map(|_| true)
@@ -293,7 +300,7 @@ impl ParityAccounts for ParityAccountsClient {
 
 	fn derive_key_index(&self, addr: RpcH160, password: String, derivation: DeriveHierarchical, save_as_account: bool) -> Result<RpcH160, Error> {
 		let addr: Address = addr.into();
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.derive_account(
 				&addr,
 				Some(password),
@@ -306,7 +313,7 @@ impl ParityAccounts for ParityAccountsClient {
 
 	fn derive_key_hash(&self, addr: RpcH160, password: String, derivation: DeriveHash, save_as_account: bool) -> Result<RpcH160, Error> {
 		let addr: Address = addr.into();
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.derive_account(
 				&addr,
 				Some(password),
@@ -319,7 +326,7 @@ impl ParityAccounts for ParityAccountsClient {
 
 	fn export_account(&self, addr: RpcH160, password: String) -> Result<KeyFile, Error> {
 		let addr = addr.into();
-		take_weak!(self.accounts)
+		self.account_provider()?
 			.export_account(
 				&addr,
 				password,

rpc/src/v1/impls/personal.rs

@@ -26,39 +26,44 @@ use futures::{future, Future, BoxFuture};
 use jsonrpc_core::Error;
 use v1::helpers::errors;
 use v1::helpers::dispatch::{Dispatcher, SignWith};
+use v1::helpers::accounts::unwrap_provider;
 use v1::traits::Personal;
 use v1::types::{H160 as RpcH160, H256 as RpcH256, U128 as RpcU128, TransactionRequest};
 use v1::metadata::Metadata;
 
 /// Account management (personal) rpc implementation.
 pub struct PersonalClient<D: Dispatcher> {
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	dispatcher: D,
 	allow_perm_unlock: bool,
 }
 
 impl<D: Dispatcher> PersonalClient<D> {
 	/// Creates new PersonalClient
-	pub fn new(store: &Arc<AccountProvider>, dispatcher: D, allow_perm_unlock: bool) -> Self {
+	pub fn new(store: &Option<Arc<AccountProvider>>, dispatcher: D, allow_perm_unlock: bool) -> Self {
 		PersonalClient {
-			accounts: Arc::downgrade(store),
+			accounts: store.as_ref().map(Arc::downgrade),
 			dispatcher: dispatcher,
 			allow_perm_unlock: allow_perm_unlock,
 		}
 	}
+
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
 }
 
 impl<D: Dispatcher + 'static> Personal for PersonalClient<D> {
 	type Metadata = Metadata;
 
 	fn accounts(&self) -> Result<Vec<RpcH160>, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let accounts = store.accounts().map_err(|e| errors::account("Could not fetch accounts.", e))?;
 		Ok(accounts.into_iter().map(Into::into).collect::<Vec<RpcH160>>())
 	}
 
 	fn new_account(&self, pass: String) -> Result<RpcH160, Error> {
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 
 		store.new_account(&pass)
 			.map(Into::into)
@@ -67,7 +72,7 @@ impl<D: Dispatcher + 'static> Personal for PersonalClient<D> {
 
 	fn unlock_account(&self, account: RpcH160, account_pass: String, duration: Option<RpcU128>) -> Result<bool, Error> {
 		let account: Address = account.into();
-		let store = take_weak!(self.accounts);
+		let store = self.account_provider()?;
 		let duration = match duration {
 			None => None,
 			Some(duration) => {
@@ -96,7 +101,7 @@ impl<D: Dispatcher + 'static> Personal for PersonalClient<D> {
 
 	fn send_transaction(&self, meta: Metadata, request: TransactionRequest, password: String) -> BoxFuture<RpcH256, Error> {
 		let dispatcher = self.dispatcher.clone();
-		let accounts = take_weakf!(self.accounts);
+		let accounts = try_bf!(self.account_provider());
 
 		let default = match request.from.as_ref() {
 			Some(account) => Ok(account.clone().into()),

rpc/src/v1/impls/signer.rs

@@ -26,13 +26,14 @@ use futures::{future, BoxFuture, Future, IntoFuture};
 use jsonrpc_core::Error;
 use v1::helpers::{errors, SignerService, SigningQueue, ConfirmationPayload};
 use v1::helpers::dispatch::{self, Dispatcher, WithToken};
+use v1::helpers::accounts::unwrap_provider;
 use v1::traits::Signer;
 use v1::types::{TransactionModification, ConfirmationRequest, ConfirmationResponse, ConfirmationResponseWithToken, U256, Bytes};
 
 /// Transactions confirmation (personal) rpc implementation.
 pub struct SignerClient<D: Dispatcher> {
 	signer: Weak<SignerService>,
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	dispatcher: D
 }
 
@@ -40,17 +41,21 @@ impl<D: Dispatcher + 'static> SignerClient<D> {
 
 	/// Create new instance of signer client.
 	pub fn new(
-		store: &Arc<AccountProvider>,
+		store: &Option<Arc<AccountProvider>>,
 		dispatcher: D,
 		signer: &Arc<SignerService>,
 	) -> Self {
 		SignerClient {
 			signer: Arc::downgrade(signer),
-			accounts: Arc::downgrade(store),
+			accounts: store.as_ref().map(Arc::downgrade),
 			dispatcher: dispatcher,
 		}
 	}
 
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
+
 	fn confirm_internal<F, T>(&self, id: U256, modification: TransactionModification, f: F) -> BoxFuture<WithToken<ConfirmationResponse>, Error> where
 		F: FnOnce(D, Arc<AccountProvider>, ConfirmationPayload) -> T,
 		T: IntoFuture<Item=WithToken<ConfirmationResponse>, Error=Error>,
@@ -60,7 +65,7 @@ impl<D: Dispatcher + 'static> SignerClient<D> {
 		let dispatcher = self.dispatcher.clone();
 
 		let setup = || {
-			Ok((take_weak!(self.accounts), take_weak!(self.signer)))
+			Ok((self.account_provider()?, take_weak!(self.signer)))
 		};
 
 		let (accounts, signer) = match setup() {

rpc/src/v1/impls/signing.rs

@@ -30,6 +30,7 @@ use v1::helpers::{
 	SIGNING_QUEUE_LIMIT, SigningQueue, ConfirmationPromise, ConfirmationResult, SignerService
 };
 use v1::helpers::dispatch::{self, Dispatcher};
+use v1::helpers::accounts::unwrap_provider;
 use v1::metadata::Metadata;
 use v1::traits::{EthSigning, ParitySigning};
 use v1::types::{
@@ -55,7 +56,7 @@ enum DispatchResult {
 /// Implementation of functions that require signing when no trusted signer is used.
 pub struct SigningQueueClient<D> {
 	signer: Weak<SignerService>,
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	dispatcher: D,
 	pending: Arc<Mutex<TransientHashMap<U256, ConfirmationPromise>>>,
 }
@@ -91,17 +92,21 @@ fn collect_garbage(map: &mut TransientHashMap<U256, ConfirmationPromise>) {
 
 impl<D: Dispatcher + 'static> SigningQueueClient<D> {
 	/// Creates a new signing queue client given shared signing queue.
-	pub fn new(signer: &Arc<SignerService>, dispatcher: D, accounts: &Arc<AccountProvider>) -> Self {
+	pub fn new(signer: &Arc<SignerService>, dispatcher: D, accounts: &Option<Arc<AccountProvider>>) -> Self {
 		SigningQueueClient {
 			signer: Arc::downgrade(signer),
-			accounts: Arc::downgrade(accounts),
+			accounts: accounts.as_ref().map(Arc::downgrade),
 			dispatcher: dispatcher,
 			pending: Arc::new(Mutex::new(TransientHashMap::new(MAX_PENDING_DURATION_SEC))),
 		}
 	}
 
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
+
 	fn dispatch(&self, payload: RpcConfirmationPayload, default_account: DefaultAccount, origin: Origin) -> BoxFuture<DispatchResult, Error> {
-		let accounts = take_weakf!(self.accounts);
+		let accounts = try_bf!(self.account_provider());
 		let default_account = match default_account {
 			DefaultAccount::Provided(acc) => acc,
 			DefaultAccount::ForDapp(dapp) => accounts.dapp_default_address(dapp).ok().unwrap_or_default(),

rpc/src/v1/impls/signing_unsafe.rs

@@ -24,6 +24,7 @@ use futures::{future, BoxFuture, Future};
 use jsonrpc_core::Error;
 use v1::helpers::{errors, DefaultAccount};
 use v1::helpers::dispatch::{self, Dispatcher};
+use v1::helpers::accounts::unwrap_provider;
 use v1::metadata::Metadata;
 use v1::traits::{EthSigning, ParitySigning};
 use v1::types::{
@@ -38,21 +39,25 @@ use v1::types::{
 
 /// Implementation of functions that require signing when no trusted signer is used.
 pub struct SigningUnsafeClient<D> {
-	accounts: Weak<AccountProvider>,
+	accounts: Option<Weak<AccountProvider>>,
 	dispatcher: D,
 }
 
 impl<D: Dispatcher + 'static> SigningUnsafeClient<D> {
 	/// Creates new SigningUnsafeClient.
-	pub fn new(accounts: &Arc<AccountProvider>, dispatcher: D) -> Self {
+	pub fn new(accounts: &Option<Arc<AccountProvider>>, dispatcher: D) -> Self {
 		SigningUnsafeClient {
-			accounts: Arc::downgrade(accounts),
+			accounts: accounts.as_ref().map(Arc::downgrade),
 			dispatcher: dispatcher,
 		}
 	}
 
+	fn account_provider(&self) -> Result<Arc<AccountProvider>, Error> {
+		unwrap_provider(&self.accounts)
+	}
+
 	fn handle(&self, payload: RpcConfirmationPayload, account: DefaultAccount) -> BoxFuture<RpcConfirmationResponse, Error> {
-		let accounts = take_weakf!(self.accounts);
+		let accounts = try_bf!(self.account_provider());
 		let default = match account {
 			DefaultAccount::Provided(acc) => acc,
 			DefaultAccount::ForDapp(dapp) => accounts.dapp_default_address(dapp).ok().unwrap_or_default(),

rpc/src/v1/tests/mocked/eth.rs

@@ -84,15 +84,16 @@ impl EthTester {
 		let client = blockchain_client();
 		let sync = sync_provider();
 		let ap = accounts_provider();
+		let opt_ap = Some(ap.clone());
 		let miner = miner_service();
 		let snapshot = snapshot_service();
 		let hashrates = Arc::new(Mutex::new(HashMap::new()));
 		let external_miner = Arc::new(ExternalMiner::new(hashrates.clone()));
-		let eth = EthClient::new(&client, &snapshot, &sync, &ap, &miner, &external_miner, options).to_delegate();
+		let eth = EthClient::new(&client, &snapshot, &sync, &opt_ap, &miner, &external_miner, options).to_delegate();
 		let filter = EthFilterClient::new(&client, &miner).to_delegate();
 
 		let dispatcher = FullDispatcher::new(Arc::downgrade(&client), Arc::downgrade(&miner));
-		let sign = SigningUnsafeClient::new(&ap, dispatcher).to_delegate();
+		let sign = SigningUnsafeClient::new(&opt_ap, dispatcher).to_delegate();
 		let mut io: IoHandler<Metadata> = IoHandler::default();
 		io.extend_with(eth);
 		io.extend_with(sign);

rpc/src/v1/tests/mocked/parity.rs

@@ -72,13 +72,15 @@ impl Dependencies {
 	}
 
 	pub fn client(&self, signer: Option<Arc<SignerService>>) -> TestParityClient {
+		let opt_accounts = Some(self.accounts.clone());
+
 		ParityClient::new(
 			&self.client,
 			&self.miner,
 			&self.sync,
 			&self.updater,
 			&self.network,
-			&self.accounts,
+			&opt_accounts,
 			self.logger.clone(),
 			self.settings.clone(),
 			signer,

rpc/src/v1/tests/mocked/parity_accounts.rs

@@ -40,7 +40,8 @@ fn accounts_provider_with_vaults_support(temp_path: &str) -> Arc<AccountProvider
 }
 
 fn setup_with_accounts_provider(accounts_provider: Arc<AccountProvider>) -> ParityAccountsTester {
-	let parity_accounts = ParityAccountsClient::new(&accounts_provider);
+	let opt_ap = Some(accounts_provider.clone());
+	let parity_accounts = ParityAccountsClient::new(&opt_ap);
 	let mut io = IoHandler::default();
 	io.extend_with(parity_accounts.to_delegate());
 

rpc/src/v1/tests/mocked/personal.rs

@@ -51,11 +51,12 @@ fn miner_service() -> Arc<TestMinerService> {
 
 fn setup() -> PersonalTester {
 	let accounts = accounts_provider();
+	let opt_accounts = Some(accounts.clone());
 	let client = blockchain_client();
 	let miner = miner_service();
 
 	let dispatcher = FullDispatcher::new(Arc::downgrade(&client), Arc::downgrade(&miner));
-	let personal = PersonalClient::new(&accounts, dispatcher, false);
+	let personal = PersonalClient::new(&opt_accounts, dispatcher, false);
 
 	let mut io = IoHandler::default();
 	io.extend_with(personal.to_delegate());

rpc/src/v1/tests/mocked/signer.rs

@@ -57,12 +57,13 @@ fn miner_service() -> Arc<TestMinerService> {
 fn signer_tester() -> SignerTester {
 	let signer = Arc::new(SignerService::new_test(None));
 	let accounts = accounts_provider();
+	let opt_accounts = Some(accounts.clone());
 	let client = blockchain_client();
 	let miner = miner_service();
 
 	let dispatcher = FullDispatcher::new(Arc::downgrade(&client), Arc::downgrade(&miner));
 	let mut io = IoHandler::default();
-	io.extend_with(SignerClient::new(&accounts, dispatcher, &signer).to_delegate());
+	io.extend_with(SignerClient::new(&opt_accounts, dispatcher, &signer).to_delegate());
 
 	SignerTester {
 		signer: signer,

rpc/src/v1/tests/mocked/signing.rs

@@ -51,13 +51,14 @@ impl Default for SigningTester {
 		let client = Arc::new(TestBlockChainClient::default());
 		let miner = Arc::new(TestMinerService::default());
 		let accounts = Arc::new(AccountProvider::transient_provider());
+		let opt_accounts = Some(accounts.clone());
 		let mut io = IoHandler::default();
 
 		let dispatcher = FullDispatcher::new(Arc::downgrade(&client), Arc::downgrade(&miner));
 
-		let rpc = SigningQueueClient::new(&signer, dispatcher.clone(), &accounts);
+		let rpc = SigningQueueClient::new(&signer, dispatcher.clone(), &opt_accounts);
 		io.extend_with(EthSigning::to_delegate(rpc));
-		let rpc = SigningQueueClient::new(&signer, dispatcher, &accounts);
+		let rpc = SigningQueueClient::new(&signer, dispatcher, &opt_accounts);
 		io.extend_with(ParitySigning::to_delegate(rpc));
 
 		SigningTester {