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diff --git a/packages/contracts/src/2.0.0/examples/Wallet/Wallet.sol b/packages/contracts/src/2.0.0/examples/Wallet/Wallet.sol
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+/*
+
+ Copyright 2018 ZeroEx Intl.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+import "../../protocol/Exchange/interfaces/IWallet.sol";
+import "../../utils/LibBytes/LibBytes.sol";
+
+
+contract Wallet is
+ IWallet
+{
+ using LibBytes for bytes;
+
+ // The owner of this wallet.
+ // solhint-disable-next-line var-name-mixedcase
+ address internal WALLET_OWNER;
+
+ /// @dev constructs a new `Wallet` with a single owner.
+ /// @param walletOwner The owner of this wallet.
+ constructor (address walletOwner) public {
+ WALLET_OWNER = walletOwner;
+ }
+
+ /// @dev Validates an EIP712 signature.
+ /// The signer must match the owner of this wallet.
+ /// @param hash Message hash that is signed.
+ /// @param eip712Signature Proof of signing.
+ /// @return Validity of signature.
+ function isValidSignature(
+ bytes32 hash,
+ bytes eip712Signature
+ )
+ external
+ view
+ returns (bool isValid)
+ {
+ require(
+ eip712Signature.length == 65,
+ "LENGTH_65_REQUIRED"
+ );
+
+ uint8 v = uint8(eip712Signature[0]);
+ bytes32 r = eip712Signature.readBytes32(1);
+ bytes32 s = eip712Signature.readBytes32(33);
+ address recoveredAddress = ecrecover(hash, v, r, s);
+ isValid = WALLET_OWNER == recoveredAddress;
+ return isValid;
+ }
+}