Merge branch 'v2-prototype' into fix/five_decimal_scenario

* v2-prototype: (75 commits)
  Update relayer grid tiles to use Text
  Fix build
  Update file structure
  Update 2.0.0 artifacts
  Move ledgerhq module declarations to typescript-typings
  Export LedgerEthereumClient type in subproviders
  Update artifacts
  Add logging and updated artifacts
  Fix migrations
  Run prettier
  Add Kovan artifacts
  Use ledger subprovider
  Add Kovan migrations
  Remove state variable from Link component in Portal
  Make registerAssetProxy append only
  Update staging api link
  Change getTransactionReceipt to awaitTransactionMined
  Move /docs route to the end
  Remove extra call to scrollIntoView for wallet in onboarding
  Update expectRevertReasonOrAlwaysFailingTransactionAsync to check status codes
  ...

1 files changed, 105 insertions, 0 deletions

diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol
new file mode 100644
index 000000000..345712d67
--- /dev/null
+++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol
@@ -0,0 +1,105 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Smart Contract Solutions, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+pragma solidity ^0.4.24;
+
+/**
+ * @title ERC721 Non-Fungible Token Standard basic interface
+ * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+ * Modified from https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC721/ERC721Basic.sol
+ */
+contract IERC721Token {
+    string internal name_;
+    string internal symbol_;
+
+    event Transfer(
+        address indexed _from,
+        address indexed _to,
+        uint256 _tokenId
+    );
+    event Approval(
+        address indexed _owner,
+        address indexed _approved,
+        uint256 _tokenId
+    );
+    event ApprovalForAll(
+        address indexed _owner,
+        address indexed _operator,
+        bool _approved
+    );
+
+    function name()
+        public
+        view
+        returns (string);
+    function symbol()
+        public
+        view
+        returns (string);
+
+    function balanceOf(address _owner)
+        public
+        view
+        returns (uint256 _balance);
+    function ownerOf(uint256 _tokenId)
+        public
+        view
+        returns (address _owner);
+    function exists(uint256 _tokenId)
+        public
+        view
+        returns (bool _exists);
+
+    function approve(address _to, uint256 _tokenId)
+        public;
+    function getApproved(uint256 _tokenId)
+        public
+        view
+        returns (address _operator);
+
+    function setApprovalForAll(address _operator, bool _approved)
+        public;
+    function isApprovedForAll(address _owner, address _operator)
+        public
+        view
+        returns (bool);
+
+    function transferFrom(
+        address _from,
+        address _to,
+        uint256 _tokenId)
+        public;
+    function safeTransferFrom(
+        address _from,
+        address _to,
+        uint256 _tokenId)
+        public;
+    function safeTransferFrom(
+        address _from,
+        address _to,
+        uint256 _tokenId,
+        bytes _data)
+        public;
+}