In-browser signing support (#3231)

* Signer RAW confirmations

* Returning address book as eth_accounts

* UI support for in-browser signing

* Post review fixes

* Adding new methods to jsonrpc

* Fixing eth_accounts

* Deterministic accounts ordering

js/src/api/format/input.js

@@ -93,6 +93,10 @@ export function inFilter (options) {
 }
 
 export function inHex (str) {
+  if (str && str.toString) {
+    str = str.toString(16);
+  }
+
   if (str && str.substr(0, 2) === '0x') {
     return str.toLowerCase();
   }

js/src/api/rpc/parity/parity.js

@@ -181,6 +181,12 @@ export default class Parity {
       .then(outAddress);
   }
 
+  nextNonce (account) {
+    return this._transport
+      .execute('parity_nextNonce', inAddress(account))
+      .then(outNumber);
+  }
+
   nodeName () {
     return this._transport
       .execute('parity_nodeName');

js/src/api/rpc/signer/signer.js

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { inNumber16 } from '../../format/input';
+import { inNumber16, inData } from '../../format/input';
 import { outSignerRequest } from '../../format/output';
 
 export default class Signer {
@@ -27,6 +27,11 @@ export default class Signer {
       .execute('signer_confirmRequest', inNumber16(requestId), options, password);
   }
 
+  confirmRequestRaw (requestId, data) {
+    return this._transport
+      .execute('signer_confirmRequestRaw', inNumber16(requestId), inData(data));
+  }
+
   generateAuthorizationToken () {
     return this._transport
       .execute('signer_generateAuthorizationToken');