[Parity Signer] Add future support for ERC-681 (#1945)

* Add future support for ERC-681

* Use `addHexPrefix`

common/components/WalletDecrypt/components/ParitySigner.tsx

@@ -17,6 +17,13 @@ interface Props {
   onUnlock(param: any): void;
 }
 
+interface SignerAddress {
+  address: string;
+  chainId: number;
+}
+
+type SignerQrContent = SignerAddress | string;
+
 class ParitySignerDecryptClass extends PureComponent<Props> {
   public render() {
     return (
@@ -36,13 +43,13 @@ class ParitySignerDecryptClass extends PureComponent<Props> {
     );
   }
 
-  private unlockAddress = (address: string) => {
-    if (!isValidETHAddress(address)) {
+  private unlockAddress = (content: SignerQrContent) => {
+    if (typeof content === 'string' || !isValidETHAddress(content.address)) {
       this.props.showNotification('danger', 'Not a valid address!');
       return;
     }
 
-    this.props.onUnlock(new ParitySignerWallet(address));
+    this.props.onUnlock(new ParitySignerWallet(content.address));
   };
 }
 

common/containers/QrSignerModal/index.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import { connect } from 'react-redux';
-
+import { addHexPrefix } from 'ethereumjs-util';
 import translate, { translateRaw } from 'translations';
 import { AppState } from 'features/reducers';
 import { paritySignerActions } from 'features/paritySigner';
@@ -95,7 +95,7 @@ class QrSignerModal extends React.Component<Props, State> {
       return;
     }
 
-    this.props.finalizeSignature(signature);
+    this.props.finalizeSignature(addHexPrefix(signature));
     this.setState({ scan: false });
   };
 }

package.json

@@ -10,10 +10,10 @@
     "npm": ">= 5.0.0"
   },
   "dependencies": {
+    "@parity/qr-signer": "0.3.1",
     "@ledgerhq/hw-app-eth": "4.7.3",
     "@ledgerhq/hw-transport-node-hid": "4.7.6",
     "@ledgerhq/hw-transport-u2f": "4.12.0",
-    "@parity/qr-signer": "0.2.1",
     "babel-polyfill": "6.26.0",
     "bip39": "2.5.0",
     "bn.js": "4.11.8",