Using LibBytes for bytes

packages/contracts/src/contracts/current/protocol/AssetProxy/MixinERC20Transfer.sol

@@ -26,6 +26,8 @@ import "./libs/LibTransferErrors.sol";
 contract MixinERC20Transfer is
     LibTransferErrors
 {
+    using LibBytes for bytes;
+
     /// @dev Internal version of `transferFrom`.
     /// @param assetData Encoded byte array.
     /// @param from Address to transfer asset from.
@@ -40,7 +42,7 @@ contract MixinERC20Transfer is
         internal
     {
         // Decode asset data.
-        address token = LibBytes.readAddress(assetData, 0);
+        address token = assetData.readAddress(0);
 
         // Transfer tokens.
         // We do a raw call so we can check the success separate

packages/contracts/src/contracts/current/protocol/AssetProxy/MixinERC721Transfer.sol

@@ -26,6 +26,8 @@ import "./libs/LibTransferErrors.sol";
 contract MixinERC721Transfer is
     LibTransferErrors
 {
+    using LibBytes for bytes;
+    
     /// @dev Internal version of `transferFrom`.
     /// @param assetData Encoded byte array.
     /// @param from Address to transfer asset from.
@@ -77,10 +79,10 @@ contract MixinERC721Transfer is
         )
     {
         // Decode asset data.
-        token = LibBytes.readAddress(assetData, 0);
+        token = assetData.readAddress(0);
-        tokenId = LibBytes.readUint256(assetData, 20);
+        tokenId = assetData.readUint256(20);
         if (assetData.length > 52) {
-            receiverData = LibBytes.readBytes(assetData, 52);
+            receiverData = assetData.readBytes(52);
         }
 
         return (

packages/contracts/src/contracts/current/protocol/AssetProxyOwner/AssetProxyOwner.sol

@@ -24,6 +24,7 @@ import "../../utils/LibBytes/LibBytes.sol";
 contract AssetProxyOwner is
     MultiSigWalletWithTimeLock
 {
+    using LibBytes for bytes;
 
     event AssetProxyRegistration(address assetProxyContract, bool isRegistered);
 
@@ -103,7 +104,7 @@ contract AssetProxyOwner is
         pure
         returns (bool)
     {
-        bytes4 first4Bytes = LibBytes.readFirst4(data);
+        bytes4 first4Bytes = data.readFirst4();
         require(REMOVE_AUTHORIZED_ADDRESS_SELECTOR == first4Bytes);
         return true;
     }

packages/contracts/src/contracts/current/protocol/Exchange/MixinSignatureValidator.sol

@@ -30,6 +30,8 @@ contract MixinSignatureValidator is
     MSignatureValidator,
     MTransactions
 {
+    using LibBytes for bytes;
+    
     // Personal message headers
     string constant ETH_PERSONAL_MESSAGE = "\x19Ethereum Signed Message:\n32";
     string constant TREZOR_PERSONAL_MESSAGE = "\x19Ethereum Signed Message:\n\x20";
@@ -101,7 +103,7 @@ contract MixinSignatureValidator is
         );
 
         // Ensure signature is supported
-        uint8 signatureTypeRaw = uint8(LibBytes.popLastByte(signature));
+        uint8 signatureTypeRaw = uint8(signature.popLastByte());
         require(
             signatureTypeRaw < uint8(SignatureType.NSignatureTypes),
             SIGNATURE_UNSUPPORTED
@@ -143,8 +145,8 @@ contract MixinSignatureValidator is
                 LENGTH_65_REQUIRED
             );
             v = uint8(signature[0]);
-            r = LibBytes.readBytes32(signature, 1);
+            r = signature.readBytes32(1);
-            s = LibBytes.readBytes32(signature, 33);
+            s = signature.readBytes32(33);
             recovered = ecrecover(hash, v, r, s);
             isValid = signerAddress == recovered;
             return isValid;
@@ -156,8 +158,8 @@ contract MixinSignatureValidator is
                 LENGTH_65_REQUIRED
             );
             v = uint8(signature[0]);
-            r = LibBytes.readBytes32(signature, 1);
+            r = signature.readBytes32(1);
-            s = LibBytes.readBytes32(signature, 33);
+            s = signature.readBytes32(33);
             recovered = ecrecover(
                 keccak256(abi.encodePacked(ETH_PERSONAL_MESSAGE, hash)),
                 v,
@@ -198,7 +200,8 @@ contract MixinSignatureValidator is
         // | 0x14 + x | 1      | Signature type is always "\x06" |
         } else if (signatureType == SignatureType.Validator) {
             // Pop last 20 bytes off of signature byte array.
-            address validatorAddress = LibBytes.popLast20Bytes(signature);
+
+            address validatorAddress = signature.popLast20Bytes();
             
             // Ensure signer has approved validator.
             if (!allowedValidators[signerAddress][validatorAddress]) {
@@ -230,8 +233,8 @@ contract MixinSignatureValidator is
                 LENGTH_65_REQUIRED
             );
             v = uint8(signature[0]);
-            r = LibBytes.readBytes32(signature, 1);
+            r = signature.readBytes32(1);
-            s = LibBytes.readBytes32(signature, 33);
+            s = signature.readBytes32(33);
             recovered = ecrecover(
                 keccak256(abi.encodePacked(TREZOR_PERSONAL_MESSAGE, hash)),
                 v,

packages/contracts/src/contracts/current/protocol/Exchange/MixinWrapperFunctions.sol

@@ -31,6 +31,8 @@ contract MixinWrapperFunctions is
     LibExchangeErrors,
     MExchangeCore
 {
+    using LibBytes for bytes;
+    
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.

packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol

@@ -22,6 +22,8 @@ pragma experimental ABIEncoderV2;
 import "../../utils/LibBytes/LibBytes.sol";
 
 contract TestLibBytes {
+    
+    using LibBytes for bytes;
 
     /// @dev Pops the last byte off of a byte array by modifying its length.
     /// @param b Byte array that will be modified.
@@ -31,7 +33,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory, bytes1 result)
     {
-        result = LibBytes.popLastByte(b);
+        result = b.popLastByte();
         return (b, result);
     }
 
@@ -43,7 +45,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory, address result)
     {
-        result = LibBytes.popLast20Bytes(b);
+        result = b.popLast20Bytes();
         return (b, result);
     }
 
@@ -56,7 +58,7 @@ contract TestLibBytes {
         pure
         returns (bool equal)
     {
-        equal = LibBytes.areBytesEqual(lhs, rhs);
+        equal = lhs.areBytesEqual(rhs);
         return equal;
     }
 
@@ -87,7 +89,7 @@ contract TestLibBytes {
         pure
         returns (address result)
     {
-        result = LibBytes.readAddress(b, index);
+        result = b.readAddress(index);
         return result;
     }
 
@@ -104,7 +106,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory)
     {
-        LibBytes.writeAddress(b, index, input);
+        b.writeAddress(index, input);
         return b;
     }
 
@@ -120,7 +122,7 @@ contract TestLibBytes {
         pure
         returns (bytes32 result)
     {
-        result = LibBytes.readBytes32(b, index);
+        result = b.readBytes32(index);
         return result;
     }
 
@@ -137,7 +139,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory)
     {
-        LibBytes.writeBytes32(b, index, input);
+        b.writeBytes32(index, input);
         return b;
     }
 
@@ -153,7 +155,7 @@ contract TestLibBytes {
         pure
         returns (uint256 result)
     {
-        result = LibBytes.readUint256(b, index);
+        result = b.readUint256(index);
         return result;
     }
 
@@ -170,7 +172,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory)
     {
-        LibBytes.writeUint256(b, index, input);
+        b.writeUint256(index, input);
         return b;
     }
 
@@ -182,7 +184,7 @@ contract TestLibBytes {
         pure
         returns (bytes4 result)
     {
-        result = LibBytes.readFirst4(b);
+        result = b.readFirst4();
         return result;
     }
 
@@ -198,7 +200,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory result)
     {
-        result = LibBytes.readBytes(b, index);
+        result = b.readBytes(index);
         return result;
     }
 
@@ -216,7 +218,7 @@ contract TestLibBytes {
         pure
         returns (bytes memory)
     {
-        LibBytes.writeBytes(b, index, input);
+        b.writeBytes(index, input);
         return b;
     }
     
@@ -241,7 +243,7 @@ contract TestLibBytes {
         require(dest + length <= mem.length);
 
         // Get pointer to memory contents
-        uint256 offset = LibBytes.getMemAddress(mem) + 32;
+        uint256 offset = mem.getMemAddress() + 32;
 
         // Execute memCopy adjusted for memory array location
         LibBytes.memCopy(offset + dest, offset + source, length);