From 4e341582ae74d7ab1c52c4e888d72c0c1c78e890 Mon Sep 17 00:00:00 2001
From: Greg Hysen <greg.hysen@gmail.com>
Date: Thu, 29 Nov 2018 18:24:19 -0800
Subject: Extract makerAddress in assembly

---
 .../CompliantForwarder/CompliantForwarder.sol      | 42 ++++++++++++++++++----
 .../test/extensions/compliant_forwarder.ts         | 16 ++++++++-
 2 files changed, 50 insertions(+), 8 deletions(-)

(limited to 'packages/contracts')

diff --git a/packages/contracts/contracts/extensions/CompliantForwarder/CompliantForwarder.sol b/packages/contracts/contracts/extensions/CompliantForwarder/CompliantForwarder.sol
index 7a4c8d2f6..b8ba43b15 100644
--- a/packages/contracts/contracts/extensions/CompliantForwarder/CompliantForwarder.sol
+++ b/packages/contracts/contracts/extensions/CompliantForwarder/CompliantForwarder.sol
@@ -31,6 +31,8 @@ contract CompliantForwarder {
     IExchange internal EXCHANGE;
     IERC721Token internal COMPLIANCE_TOKEN;
 
+    bytes4 constant internal EXCHANGE_FILL_ORDER_SELECTOR_2 = 0xb4be83d5;
+
     constructor(address exchange, address complianceToken)
         public
     {
@@ -41,17 +43,43 @@ contract CompliantForwarder {
     function executeTransaction(
         uint256 salt,
         address signerAddress,
-        bytes signedFillOrderTransaction,
+        bytes signedExchangeTransaction,
         bytes signature
     ) 
-        public
+        external
     {
         // Validate `signedFillOrderTransaction`
-        bytes4 selector = signedFillOrderTransaction.readBytes4(0);
-        if (selector != EXCHANGE_FILL_ORDER_SELECTOR) {
-            revert("EXCHANGE_TRANSACTION_NOT_FILL_ORDER");
+        bytes4 selector = signedExchangeTransaction.readBytes4(0);
+        address makerAddress = 0x00;
+        assembly {
+            function getMakerAddress(orderPtr) -> makerAddress {
+                let orderOffset := calldataload(orderPtr)
+                makerAddress := calldataload(orderOffset)
+            }
+
+            switch selector
+            case 0xb4be83d500000000000000000000000000000000000000000000000000000000 {
+                let exchangeTxPtr := calldataload(0x44)
+
+                // Add 0x20 for length offset and 0x04 for selector offset
+                let orderPtrRelativeToExchangeTx := calldataload(add(0x4, add(exchangeTxPtr, 0x24))) // 0x60
+                let orderPtr := add(0x4,add(exchangeTxPtr, add(0x24, orderPtrRelativeToExchangeTx)))
+                
+                makerAddress := calldataload(orderPtr)
+                
+                
+                //makerAddress := getMakerAddress(orderPtr)
+            }
+            default {
+                // revert(0, 100)
+            }
         }
         
+        /*
+        if (selector != 0xb4be83d5) {
+            revert("EXCHANGE_TRANSACTION_NOT_FILL_ORDER");
+        }*/
+        
         // Taker must be compliant
         require(
             COMPLIANCE_TOKEN.balanceOf(signerAddress) > 0,
@@ -87,7 +115,7 @@ contract CompliantForwarder {
         // Add 0x4 to a given offset to account for the fillOrder selector prepended to `signedFillOrderTransaction`.
         // Add 0xc to the makerAddress since abi-encoded addresses are left padded with 12 bytes.
         // Putting this together: makerAddress = 0x60 + 0x4 + 0xc = 0x70
-        address makerAddress = signedFillOrderTransaction.readAddress(0x70);
+        //address makerAddress = signedExchangeTransaction.readAddress(0x70);
         require(
             COMPLIANCE_TOKEN.balanceOf(makerAddress) > 0, 
             "MAKER_UNVERIFIED"
@@ -97,7 +125,7 @@ contract CompliantForwarder {
         EXCHANGE.executeTransaction(
             salt,
             signerAddress,
-            signedFillOrderTransaction,
+            signedExchangeTransaction,
             signature
         );
     }
diff --git a/packages/contracts/test/extensions/compliant_forwarder.ts b/packages/contracts/test/extensions/compliant_forwarder.ts
index c962d82ac..b916f54c9 100644
--- a/packages/contracts/test/extensions/compliant_forwarder.ts
+++ b/packages/contracts/test/extensions/compliant_forwarder.ts
@@ -26,6 +26,9 @@ import { TransactionFactory } from '../utils/transaction_factory';
 import { ContractName, ERC20BalancesByOwner, SignedTransaction } from '../utils/types';
 import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
 
+import { MethodAbi } from 'ethereum-types';
+import { AbiEncoder } from '@0x/utils';
+
 chaiSetup.configure();
 const expect = chai.expect;
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
@@ -192,7 +195,18 @@ describe.only(ContractName.CompliantForwarder, () => {
         beforeEach(async () => {
             erc20Balances = await erc20Wrapper.getBalancesAsync();
         });
-        it('should transfer the correct amounts when maker and taker are compliant', async () => {
+        it.only('should transfer the correct amounts when maker and taker are compliant', async () => {
+        
+ 
+            const method = new AbiEncoder.Method(compliantForwarderInstance.abi[0] as MethodAbi);
+            const args = [
+                compliantSignedFillOrderTx.salt,
+                compliantSignedFillOrderTx.signerAddress,
+                compliantSignedFillOrderTx.data,
+                compliantSignedFillOrderTx.signature
+            ];
+            console.log(method.encode(args, {annotate: true}));
+            
             await compliantForwarderInstance.executeTransaction.sendTransactionAsync(
                 compliantSignedFillOrderTx.salt,
                 compliantSignedFillOrderTx.signerAddress,
-- 
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