Introduce SignedOrder class and remove type assertions

3 files changed, 223 insertions, 220 deletions

diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index 7a654b2df..4c3c1dd93 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -22,6 +22,7 @@ import { crypto } from '../../util/crypto';
 import { ExchangeWrapper } from '../../util/exchange_wrapper';
 import { Order } from '../../util/order';
 import { OrderFactory } from '../../util/order_factory';
+import { SignedOrder } from '../../util/signed_order';
 import { BalancesByOwner, ContractName, ExchangeContractErrs } from '../../util/types';
 import { chaiSetup } from '../utils/chai_setup';
 import { deployer } from '../utils/deployer';
@@ -46,7 +47,7 @@ describe('Exchange', () => {
     let exchange: ExchangeContract;
     let tokenTransferProxy: TokenTransferProxyContract;
 
-    let order: Order;
+    let signedOrder: SignedOrder;
     let balances: BalancesByOwner;
     let exWrapper: ExchangeWrapper;
     let dmyBalances: Balances;
@@ -147,85 +148,85 @@ describe('Exchange', () => {
     describe('fillOrder', () => {
         beforeEach(async () => {
             balances = await dmyBalances.getAsync();
-            order = await orderFactory.newSignedOrderAsync();
+            signedOrder = await orderFactory.newSignedOrderAsync();
         });
 
         it('should create an unfillable order', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: new BigNumber(1001),
                 takerTokenAmount: new BigNumber(3),
             });
 
             const filledTakerTokenAmountBefore = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountBefore).to.be.bignumber.equal(0);
 
             const fillTakerTokenAmount1 = new BigNumber(2);
-            await exWrapper.fillOrderAsync(order, taker, {
+            await exWrapper.fillOrderAsync(signedOrder, taker, {
                 fillTakerTokenAmount: fillTakerTokenAmount1,
             });
 
             const filledTakerTokenAmountAfter1 = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountAfter1).to.be.bignumber.equal(fillTakerTokenAmount1);
 
             const fillTakerTokenAmount2 = new BigNumber(1);
-            await exWrapper.fillOrderAsync(order, taker, {
+            await exWrapper.fillOrderAsync(signedOrder, taker, {
                 fillTakerTokenAmount: fillTakerTokenAmount2,
             });
 
             const filledTakerTokenAmountAfter2 = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountAfter2).to.be.bignumber.equal(filledTakerTokenAmountAfter1);
         });
 
         it('should transfer the correct amounts when makerTokenAmount === takerTokenAmount', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
             });
 
             const filledTakerTokenAmountBefore = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountBefore).to.be.bignumber.equal(0);
 
-            const fillTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.fillOrderAsync(order, taker, { fillTakerTokenAmount });
+            const fillTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.fillOrderAsync(signedOrder, taker, { fillTakerTokenAmount });
 
             const filledTakerTokenAmountAfter = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountAfter).to.be.bignumber.equal(fillTakerTokenAmount);
 
             const newBalances = await dmyBalances.getAsync();
 
             const fillMakerTokenAmount = fillTakerTokenAmount
-                .times(order.params.makerTokenAmount)
-                .dividedToIntegerBy(order.params.takerTokenAmount);
-            const paidMakerFee = order.params.makerFee
+                .times(signedOrder.params.makerTokenAmount)
+                .dividedToIntegerBy(signedOrder.params.takerTokenAmount);
+            const paidMakerFee = signedOrder.params.makerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            const paidTakerFee = order.params.takerFee
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            const paidTakerFee = signedOrder.params.takerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(fillMakerTokenAmount),
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(fillMakerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(fillTakerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(fillTakerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
                 balances[maker][zrx.address].minus(paidMakerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(fillTakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(fillTakerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(fillMakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(fillMakerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
                 balances[taker][zrx.address].minus(paidTakerFee),
@@ -236,49 +237,49 @@ describe('Exchange', () => {
         });
 
         it('should transfer the correct amounts when makerTokenAmount > takerTokenAmount', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(200), 18),
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
             });
 
             const filledTakerTokenAmountBefore = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountBefore).to.be.bignumber.equal(0);
 
-            const fillTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.fillOrderAsync(order, taker, { fillTakerTokenAmount });
+            const fillTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.fillOrderAsync(signedOrder, taker, { fillTakerTokenAmount });
 
             const filledTakerTokenAmountAfter = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountAfter).to.be.bignumber.equal(fillTakerTokenAmount);
 
             const newBalances = await dmyBalances.getAsync();
 
             const fillMakerTokenAmount = fillTakerTokenAmount
-                .times(order.params.makerTokenAmount)
-                .dividedToIntegerBy(order.params.takerTokenAmount);
-            const paidMakerFee = order.params.makerFee
+                .times(signedOrder.params.makerTokenAmount)
+                .dividedToIntegerBy(signedOrder.params.takerTokenAmount);
+            const paidMakerFee = signedOrder.params.makerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            const paidTakerFee = order.params.takerFee
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            const paidTakerFee = signedOrder.params.takerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(fillMakerTokenAmount),
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(fillMakerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(fillTakerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(fillTakerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
                 balances[maker][zrx.address].minus(paidMakerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(fillTakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(fillTakerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(fillMakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(fillMakerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
                 balances[taker][zrx.address].minus(paidTakerFee),
@@ -289,49 +290,49 @@ describe('Exchange', () => {
         });
 
         it('should transfer the correct amounts when makerTokenAmount < takerTokenAmount', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(200), 18),
             });
 
             const filledTakerTokenAmountBefore = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountBefore).to.be.bignumber.equal(0);
 
-            const fillTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.fillOrderAsync(order, taker, { fillTakerTokenAmount });
+            const fillTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.fillOrderAsync(signedOrder, taker, { fillTakerTokenAmount });
 
             const filledTakerTokenAmountAfter = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountAfter).to.be.bignumber.equal(fillTakerTokenAmount);
 
             const newBalances = await dmyBalances.getAsync();
 
             const fillMakerTokenAmount = fillTakerTokenAmount
-                .times(order.params.makerTokenAmount)
-                .dividedToIntegerBy(order.params.takerTokenAmount);
-            const paidMakerFee = order.params.makerFee
+                .times(signedOrder.params.makerTokenAmount)
+                .dividedToIntegerBy(signedOrder.params.takerTokenAmount);
+            const paidMakerFee = signedOrder.params.makerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            const paidTakerFee = order.params.takerFee
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            const paidTakerFee = signedOrder.params.takerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(fillMakerTokenAmount),
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(fillMakerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(fillTakerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(fillTakerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
                 balances[maker][zrx.address].minus(paidMakerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(fillTakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(fillTakerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(fillMakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(fillMakerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
                 balances[taker][zrx.address].minus(paidTakerFee),
@@ -342,22 +343,22 @@ describe('Exchange', () => {
         });
 
         it('should transfer the correct amounts when taker is specified and order is claimed by taker', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 taker,
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(200), 18),
             });
 
             const filledTakerTokenAmountBefore = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             expect(filledTakerTokenAmountBefore).to.be.bignumber.equal(0);
 
-            const fillTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.fillOrderAsync(order, taker, { fillTakerTokenAmount });
+            const fillTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.fillOrderAsync(signedOrder, taker, { fillTakerTokenAmount });
 
             const filledTakerTokenAmountAfter = await zeroEx.exchange.getFilledTakerAmountAsync(
-                order.getOrderHashHex(),
+                signedOrder.getOrderHashHex(),
             );
             const expectedFillAmountTAfter = fillTakerTokenAmount.add(filledTakerTokenAmountBefore);
             expect(filledTakerTokenAmountAfter).to.be.bignumber.equal(expectedFillAmountTAfter);
@@ -365,28 +366,28 @@ describe('Exchange', () => {
             const newBalances = await dmyBalances.getAsync();
 
             const fillMakerTokenAmount = fillTakerTokenAmount
-                .times(order.params.makerTokenAmount)
-                .dividedToIntegerBy(order.params.takerTokenAmount);
-            const paidMakerFee = order.params.makerFee
+                .times(signedOrder.params.makerTokenAmount)
+                .dividedToIntegerBy(signedOrder.params.takerTokenAmount);
+            const paidMakerFee = signedOrder.params.makerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            const paidTakerFee = order.params.takerFee
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            const paidTakerFee = signedOrder.params.takerFee
                 .times(fillMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(fillMakerTokenAmount),
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(fillMakerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(fillTakerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(fillTakerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
                 balances[maker][zrx.address].minus(paidMakerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(fillTakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(fillTakerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(fillMakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(fillMakerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
                 balances[taker][zrx.address].minus(paidTakerFee),
@@ -397,141 +398,141 @@ describe('Exchange', () => {
         });
 
         it('should fill remaining value if fillTakerTokenAmount > remaining takerTokenAmount', async () => {
-            const fillTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.fillOrderAsync(order, taker, { fillTakerTokenAmount });
+            const fillTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.fillOrderAsync(signedOrder, taker, { fillTakerTokenAmount });
 
-            const res = await exWrapper.fillOrderAsync(order, taker, {
-                fillTakerTokenAmount: order.params.takerTokenAmount,
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker, {
+                fillTakerTokenAmount: signedOrder.params.takerTokenAmount,
             });
             const log = res.logs[0] as LogWithDecodedArgs<LogFillContractEventArgs>;
             expect(log.args.filledTakerTokenAmount).to.be.bignumber.equal(
-                order.params.takerTokenAmount.minus(fillTakerTokenAmount),
+                signedOrder.params.takerTokenAmount.minus(fillTakerTokenAmount),
             );
             const newBalances = await dmyBalances.getAsync();
 
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(order.params.makerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(signedOrder.params.makerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(order.params.takerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(signedOrder.params.takerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
-                balances[maker][zrx.address].minus(order.params.makerFee),
+                balances[maker][zrx.address].minus(signedOrder.params.makerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(order.params.takerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(signedOrder.params.takerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(order.params.makerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(signedOrder.params.makerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
-                balances[taker][zrx.address].minus(order.params.takerFee),
+                balances[taker][zrx.address].minus(signedOrder.params.takerFee),
             );
             expect(newBalances[feeRecipient][zrx.address]).to.be.bignumber.equal(
-                balances[feeRecipient][zrx.address].add(order.params.makerFee.add(order.params.takerFee)),
+                balances[feeRecipient][zrx.address].add(signedOrder.params.makerFee.add(signedOrder.params.takerFee)),
             );
         });
 
         it('should log 1 event with the correct arguments when order has a feeRecipient', async () => {
             const divisor = 2;
-            const res = await exWrapper.fillOrderAsync(order, taker, {
-                fillTakerTokenAmount: order.params.takerTokenAmount.div(divisor),
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker, {
+                fillTakerTokenAmount: signedOrder.params.takerTokenAmount.div(divisor),
             });
             expect(res.logs).to.have.length(1);
 
             const logArgs = (res.logs[0] as LogWithDecodedArgs<LogFillContractEventArgs>).args;
-            const expectedFilledMakerTokenAmount = order.params.makerTokenAmount.div(divisor);
-            const expectedFilledTakerTokenAmount = order.params.takerTokenAmount.div(divisor);
-            const expectedFeeMPaid = order.params.makerFee.div(divisor);
-            const expectedFeeTPaid = order.params.takerFee.div(divisor);
-            const tokensHashBuff = crypto.solSHA3([order.params.makerToken, order.params.takerToken]);
+            const expectedFilledMakerTokenAmount = signedOrder.params.makerTokenAmount.div(divisor);
+            const expectedFilledTakerTokenAmount = signedOrder.params.takerTokenAmount.div(divisor);
+            const expectedFeeMPaid = signedOrder.params.makerFee.div(divisor);
+            const expectedFeeTPaid = signedOrder.params.takerFee.div(divisor);
+            const tokensHashBuff = crypto.solSHA3([signedOrder.params.makerToken, signedOrder.params.takerToken]);
             const expectedTokens = ethUtil.bufferToHex(tokensHashBuff);
 
-            expect(order.params.maker).to.be.equal(logArgs.maker);
+            expect(signedOrder.params.maker).to.be.equal(logArgs.maker);
             expect(taker).to.be.equal(logArgs.taker);
-            expect(order.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
-            expect(order.params.makerToken).to.be.equal(logArgs.makerToken);
-            expect(order.params.takerToken).to.be.equal(logArgs.takerToken);
+            expect(signedOrder.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
+            expect(signedOrder.params.makerToken).to.be.equal(logArgs.makerToken);
+            expect(signedOrder.params.takerToken).to.be.equal(logArgs.takerToken);
             expect(expectedFilledMakerTokenAmount).to.be.bignumber.equal(logArgs.filledMakerTokenAmount);
             expect(expectedFilledTakerTokenAmount).to.be.bignumber.equal(logArgs.filledTakerTokenAmount);
             expect(expectedFeeMPaid).to.be.bignumber.equal(logArgs.paidMakerFee);
             expect(expectedFeeTPaid).to.be.bignumber.equal(logArgs.paidTakerFee);
             expect(expectedTokens).to.be.equal(logArgs.tokens);
-            expect(order.getOrderHashHex()).to.be.equal(logArgs.orderHash);
+            expect(signedOrder.getOrderHashHex()).to.be.equal(logArgs.orderHash);
         });
 
         it('should log 1 event with the correct arguments when order has no feeRecipient', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 feeRecipient: ZeroEx.NULL_ADDRESS,
             });
             const divisor = 2;
-            const res = await exWrapper.fillOrderAsync(order, taker, {
-                fillTakerTokenAmount: order.params.takerTokenAmount.div(divisor),
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker, {
+                fillTakerTokenAmount: signedOrder.params.takerTokenAmount.div(divisor),
             });
             expect(res.logs).to.have.length(1);
 
             const logArgs = (res.logs[0] as LogWithDecodedArgs<LogFillContractEventArgs>).args;
-            const expectedFilledMakerTokenAmount = order.params.makerTokenAmount.div(divisor);
-            const expectedFilledTakerTokenAmount = order.params.takerTokenAmount.div(divisor);
+            const expectedFilledMakerTokenAmount = signedOrder.params.makerTokenAmount.div(divisor);
+            const expectedFilledTakerTokenAmount = signedOrder.params.takerTokenAmount.div(divisor);
             const expectedFeeMPaid = new BigNumber(0);
             const expectedFeeTPaid = new BigNumber(0);
-            const tokensHashBuff = crypto.solSHA3([order.params.makerToken, order.params.takerToken]);
+            const tokensHashBuff = crypto.solSHA3([signedOrder.params.makerToken, signedOrder.params.takerToken]);
             const expectedTokens = ethUtil.bufferToHex(tokensHashBuff);
 
-            expect(order.params.maker).to.be.equal(logArgs.maker);
+            expect(signedOrder.params.maker).to.be.equal(logArgs.maker);
             expect(taker).to.be.equal(logArgs.taker);
-            expect(order.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
-            expect(order.params.makerToken).to.be.equal(logArgs.makerToken);
-            expect(order.params.takerToken).to.be.equal(logArgs.takerToken);
+            expect(signedOrder.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
+            expect(signedOrder.params.makerToken).to.be.equal(logArgs.makerToken);
+            expect(signedOrder.params.takerToken).to.be.equal(logArgs.takerToken);
             expect(expectedFilledMakerTokenAmount).to.be.bignumber.equal(logArgs.filledMakerTokenAmount);
             expect(expectedFilledTakerTokenAmount).to.be.bignumber.equal(logArgs.filledTakerTokenAmount);
             expect(expectedFeeMPaid).to.be.bignumber.equal(logArgs.paidMakerFee);
             expect(expectedFeeTPaid).to.be.bignumber.equal(logArgs.paidTakerFee);
             expect(expectedTokens).to.be.equal(logArgs.tokens);
-            expect(order.getOrderHashHex()).to.be.equal(logArgs.orderHash);
+            expect(signedOrder.getOrderHashHex()).to.be.equal(logArgs.orderHash);
         });
 
         it('should throw when taker is specified and order is claimed by other', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 taker: feeRecipient,
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100), 18),
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(200), 18),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.fillOrderAsync(signedOrder, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if signature is invalid', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(10), 18),
             });
 
-            order.params.r = ethUtil.bufferToHex(ethUtil.sha3('invalidR'));
-            order.params.s = ethUtil.bufferToHex(ethUtil.sha3('invalidS'));
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
+            signedOrder.params.r = ethUtil.bufferToHex(ethUtil.sha3('invalidR'));
+            signedOrder.params.s = ethUtil.bufferToHex(ethUtil.sha3('invalidS'));
+            return expect(exWrapper.fillOrderAsync(signedOrder, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if makerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.fillOrderAsync(signedOrder, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if takerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.fillOrderAsync(signedOrder, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if fillTakerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync();
+            signedOrder = await orderFactory.newSignedOrderAsync();
 
             return expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     fillTakerTokenAmount: new BigNumber(0),
                 }),
             ).to.be.rejectedWith(constants.REVERT);
@@ -539,23 +540,23 @@ describe('Exchange', () => {
 
         it('should not change balances if maker balances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100000), 18),
             });
 
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
 
         it('should throw if maker balances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = true', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100000), 18),
             });
 
             return expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     shouldThrowOnInsufficientBalanceOrAllowance: true,
                 }),
             ).to.be.rejectedWith(constants.REVERT);
@@ -563,23 +564,23 @@ describe('Exchange', () => {
 
         it('should not change balances if taker balances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100000), 18),
             });
 
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
 
         it('should throw if taker balances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = true', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(100000), 18),
             });
 
             return expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     shouldThrowOnInsufficientBalanceOrAllowance: true,
                 }),
             ).to.be.rejectedWith(constants.REVERT);
@@ -588,7 +589,7 @@ describe('Exchange', () => {
         it('should not change balances if maker allowances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             await rep.approve.sendTransactionAsync(tokenTransferProxy.address, new BigNumber(0), { from: maker });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             await rep.approve.sendTransactionAsync(tokenTransferProxy.address, INITIAL_ALLOWANCE, {
                 from: maker,
             });
@@ -601,7 +602,7 @@ describe('Exchange', () => {
                 shouldThrowOnInsufficientBalanceOrAllowance = true', async () => {
             await rep.approve.sendTransactionAsync(tokenTransferProxy.address, new BigNumber(0), { from: maker });
             expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     shouldThrowOnInsufficientBalanceOrAllowance: true,
                 }),
             ).to.be.rejectedWith(constants.REVERT);
@@ -613,7 +614,7 @@ describe('Exchange', () => {
         it('should not change balances if taker allowances are too low to fill order and \
                 shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             await dgd.approve.sendTransactionAsync(tokenTransferProxy.address, new BigNumber(0), { from: taker });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             await dgd.approve.sendTransactionAsync(tokenTransferProxy.address, INITIAL_ALLOWANCE, {
                 from: taker,
             });
@@ -626,7 +627,7 @@ describe('Exchange', () => {
                 shouldThrowOnInsufficientBalanceOrAllowance = true', async () => {
             await dgd.approve.sendTransactionAsync(tokenTransferProxy.address, new BigNumber(0), { from: taker });
             expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     shouldThrowOnInsufficientBalanceOrAllowance: true,
                 }),
             ).to.be.rejectedWith(constants.REVERT);
@@ -638,12 +639,12 @@ describe('Exchange', () => {
         it('should not change balances if makerToken is ZRX, makerTokenAmount + makerFee > maker balance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             const makerZRXBalance = new BigNumber(balances[maker][zrx.address]);
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerToken: zrx.address,
                 makerTokenAmount: makerZRXBalance,
                 makerFee: new BigNumber(1),
             });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
@@ -651,12 +652,12 @@ describe('Exchange', () => {
         it('should not change balances if makerToken is ZRX, makerTokenAmount + makerFee > maker allowance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             const makerZRXAllowance = await zrx.allowance(maker, tokenTransferProxy.address);
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerToken: zrx.address,
                 makerTokenAmount: new BigNumber(makerZRXAllowance),
                 makerFee: new BigNumber(1),
             });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
@@ -664,12 +665,12 @@ describe('Exchange', () => {
         it('should not change balances if takerToken is ZRX, takerTokenAmount + takerFee > taker balance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             const takerZRXBalance = new BigNumber(balances[taker][zrx.address]);
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerToken: zrx.address,
                 takerTokenAmount: takerZRXBalance,
                 takerFee: new BigNumber(1),
             });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
@@ -677,12 +678,12 @@ describe('Exchange', () => {
         it('should not change balances if takerToken is ZRX, takerTokenAmount + takerFee > taker allowance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
             const takerZRXAllowance = await zrx.allowance(taker, tokenTransferProxy.address);
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerToken: zrx.address,
                 takerTokenAmount: new BigNumber(takerZRXAllowance),
                 takerFee: new BigNumber(1),
             });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
@@ -694,33 +695,33 @@ describe('Exchange', () => {
                 from: taker,
             });
 
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerToken: maliciousToken.address,
             });
 
             return expect(
-                exWrapper.fillOrderAsync(order, taker, {
+                exWrapper.fillOrderAsync(signedOrder, taker, {
                     shouldThrowOnInsufficientBalanceOrAllowance: false,
                 }),
             ).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should not change balances if an order is expired', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 expirationTimestampInSec: new BigNumber(Math.floor((Date.now() - 10000) / 1000)),
             });
-            await exWrapper.fillOrderAsync(order, taker);
+            await exWrapper.fillOrderAsync(signedOrder, taker);
 
             const newBalances = await dmyBalances.getAsync();
             expect(newBalances).to.be.deep.equal(balances);
         });
 
         it('should log an error event if an order is expired', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 expirationTimestampInSec: new BigNumber(Math.floor((Date.now() - 10000) / 1000)),
             });
 
-            const res = await exWrapper.fillOrderAsync(order, taker);
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker);
             expect(res.logs).to.have.length(1);
             const log = res.logs[0] as LogWithDecodedArgs<LogErrorContractEventArgs>;
             const errCode = log.args.errorId.toNumber();
@@ -728,10 +729,10 @@ describe('Exchange', () => {
         });
 
         it('should log an error event if no value is filled', async () => {
-            order = await orderFactory.newSignedOrderAsync({});
-            await exWrapper.fillOrderAsync(order, taker);
+            signedOrder = await orderFactory.newSignedOrderAsync({});
+            await exWrapper.fillOrderAsync(signedOrder, taker);
 
-            const res = await exWrapper.fillOrderAsync(order, taker);
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker);
             expect(res.logs).to.have.length(1);
             const log = res.logs[0] as LogWithDecodedArgs<LogErrorContractEventArgs>;
             const errCode = log.args.errorId.toNumber();
@@ -742,43 +743,43 @@ describe('Exchange', () => {
     describe('cancelOrder', () => {
         beforeEach(async () => {
             balances = await dmyBalances.getAsync();
-            order = await orderFactory.newSignedOrderAsync();
+            signedOrder = await orderFactory.newSignedOrderAsync();
         });
 
         it('should throw if not sent by maker', async () => {
-            return expect(exWrapper.cancelOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.cancelOrderAsync(signedOrder, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if makerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.cancelOrderAsync(signedOrder, maker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if takerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 takerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.REVERT);
+            return expect(exWrapper.cancelOrderAsync(signedOrder, maker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if cancelTakerTokenAmount is 0', async () => {
-            order = await orderFactory.newSignedOrderAsync();
+            signedOrder = await orderFactory.newSignedOrderAsync();
 
             return expect(
-                exWrapper.cancelOrderAsync(order, maker, {
+                exWrapper.cancelOrderAsync(signedOrder, maker, {
                     cancelTakerTokenAmount: new BigNumber(0),
                 }),
             ).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should be able to cancel a full order', async () => {
-            await exWrapper.cancelOrderAsync(order, maker);
-            await exWrapper.fillOrderAsync(order, taker, {
-                fillTakerTokenAmount: order.params.takerTokenAmount.div(2),
+            await exWrapper.cancelOrderAsync(signedOrder, maker);
+            await exWrapper.fillOrderAsync(signedOrder, taker, {
+                fillTakerTokenAmount: signedOrder.params.takerTokenAmount.div(2),
             });
 
             const newBalances = await dmyBalances.getAsync();
@@ -786,43 +787,43 @@ describe('Exchange', () => {
         });
 
         it('should be able to cancel part of an order', async () => {
-            const cancelTakerTokenAmount = order.params.takerTokenAmount.div(2);
-            await exWrapper.cancelOrderAsync(order, maker, {
+            const cancelTakerTokenAmount = signedOrder.params.takerTokenAmount.div(2);
+            await exWrapper.cancelOrderAsync(signedOrder, maker, {
                 cancelTakerTokenAmount,
             });
 
-            const res = await exWrapper.fillOrderAsync(order, taker, {
-                fillTakerTokenAmount: order.params.takerTokenAmount,
+            const res = await exWrapper.fillOrderAsync(signedOrder, taker, {
+                fillTakerTokenAmount: signedOrder.params.takerTokenAmount,
             });
             const log = res.logs[0] as LogWithDecodedArgs<LogFillContractEventArgs>;
             expect(log.args.filledTakerTokenAmount).to.be.bignumber.equal(
-                order.params.takerTokenAmount.minus(cancelTakerTokenAmount),
+                signedOrder.params.takerTokenAmount.minus(cancelTakerTokenAmount),
             );
 
             const newBalances = await dmyBalances.getAsync();
             const cancelMakerTokenAmount = cancelTakerTokenAmount
-                .times(order.params.makerTokenAmount)
-                .dividedToIntegerBy(order.params.takerTokenAmount);
-            const paidMakerFee = order.params.makerFee
+                .times(signedOrder.params.makerTokenAmount)
+                .dividedToIntegerBy(signedOrder.params.takerTokenAmount);
+            const paidMakerFee = signedOrder.params.makerFee
                 .times(cancelMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            const paidTakerFee = order.params.takerFee
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            const paidTakerFee = signedOrder.params.takerFee
                 .times(cancelMakerTokenAmount)
-                .dividedToIntegerBy(order.params.makerTokenAmount);
-            expect(newBalances[maker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.makerToken].minus(cancelMakerTokenAmount),
+                .dividedToIntegerBy(signedOrder.params.makerTokenAmount);
+            expect(newBalances[maker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.makerToken].minus(cancelMakerTokenAmount),
             );
-            expect(newBalances[maker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[maker][order.params.takerToken].add(cancelTakerTokenAmount),
+            expect(newBalances[maker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[maker][signedOrder.params.takerToken].add(cancelTakerTokenAmount),
             );
             expect(newBalances[maker][zrx.address]).to.be.bignumber.equal(
                 balances[maker][zrx.address].minus(paidMakerFee),
             );
-            expect(newBalances[taker][order.params.takerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.takerToken].minus(cancelTakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.takerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.takerToken].minus(cancelTakerTokenAmount),
             );
-            expect(newBalances[taker][order.params.makerToken]).to.be.bignumber.equal(
-                balances[taker][order.params.makerToken].add(cancelMakerTokenAmount),
+            expect(newBalances[taker][signedOrder.params.makerToken]).to.be.bignumber.equal(
+                balances[taker][signedOrder.params.makerToken].add(cancelMakerTokenAmount),
             );
             expect(newBalances[taker][zrx.address]).to.be.bignumber.equal(
                 balances[taker][zrx.address].minus(paidTakerFee),
@@ -834,32 +835,32 @@ describe('Exchange', () => {
 
         it('should log 1 event with correct arguments', async () => {
             const divisor = 2;
-            const res = await exWrapper.cancelOrderAsync(order, maker, {
-                cancelTakerTokenAmount: order.params.takerTokenAmount.div(divisor),
+            const res = await exWrapper.cancelOrderAsync(signedOrder, maker, {
+                cancelTakerTokenAmount: signedOrder.params.takerTokenAmount.div(divisor),
             });
             expect(res.logs).to.have.length(1);
 
             const log = res.logs[0] as LogWithDecodedArgs<LogCancelContractEventArgs>;
             const logArgs = log.args;
-            const expectedCancelledMakerTokenAmount = order.params.makerTokenAmount.div(divisor);
-            const expectedCancelledTakerTokenAmount = order.params.takerTokenAmount.div(divisor);
-            const tokensHashBuff = crypto.solSHA3([order.params.makerToken, order.params.takerToken]);
+            const expectedCancelledMakerTokenAmount = signedOrder.params.makerTokenAmount.div(divisor);
+            const expectedCancelledTakerTokenAmount = signedOrder.params.takerTokenAmount.div(divisor);
+            const tokensHashBuff = crypto.solSHA3([signedOrder.params.makerToken, signedOrder.params.takerToken]);
             const expectedTokens = ethUtil.bufferToHex(tokensHashBuff);
 
-            expect(order.params.maker).to.be.equal(logArgs.maker);
-            expect(order.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
-            expect(order.params.makerToken).to.be.equal(logArgs.makerToken);
-            expect(order.params.takerToken).to.be.equal(logArgs.takerToken);
+            expect(signedOrder.params.maker).to.be.equal(logArgs.maker);
+            expect(signedOrder.params.feeRecipient).to.be.equal(logArgs.feeRecipient);
+            expect(signedOrder.params.makerToken).to.be.equal(logArgs.makerToken);
+            expect(signedOrder.params.takerToken).to.be.equal(logArgs.takerToken);
             expect(expectedCancelledMakerTokenAmount).to.be.bignumber.equal(logArgs.cancelledMakerTokenAmount);
             expect(expectedCancelledTakerTokenAmount).to.be.bignumber.equal(logArgs.cancelledTakerTokenAmount);
             expect(expectedTokens).to.be.equal(logArgs.tokens);
-            expect(order.getOrderHashHex()).to.be.equal(logArgs.orderHash);
+            expect(signedOrder.getOrderHashHex()).to.be.equal(logArgs.orderHash);
         });
 
         it('should not log events if no value is cancelled', async () => {
-            await exWrapper.cancelOrderAsync(order, maker);
+            await exWrapper.cancelOrderAsync(signedOrder, maker);
 
-            const res = await exWrapper.cancelOrderAsync(order, maker);
+            const res = await exWrapper.cancelOrderAsync(signedOrder, maker);
             expect(res.logs).to.have.length(1);
             const log = res.logs[0] as LogWithDecodedArgs<LogErrorContractEventArgs>;
             const errCode = log.args.errorId.toNumber();
@@ -867,11 +868,11 @@ describe('Exchange', () => {
         });
 
         it('should not log events if order is expired', async () => {
-            order = await orderFactory.newSignedOrderAsync({
+            signedOrder = await orderFactory.newSignedOrderAsync({
                 expirationTimestampInSec: new BigNumber(Math.floor((Date.now() - 10000) / 1000)),
             });
 
-            const res = await exWrapper.cancelOrderAsync(order, maker);
+            const res = await exWrapper.cancelOrderAsync(signedOrder, maker);
             expect(res.logs).to.have.length(1);
             const log = res.logs[0] as LogWithDecodedArgs<LogErrorContractEventArgs>;
             const errCode = log.args.errorId.toNumber();
diff --git a/packages/contracts/test/exchange/helpers.ts b/packages/contracts/test/exchange/helpers.ts
index e2e35ece8..263a74911 100644
--- a/packages/contracts/test/exchange/helpers.ts
+++ b/packages/contracts/test/exchange/helpers.ts
@@ -10,6 +10,7 @@ import { constants } from '../../util/constants';
 import { ExchangeWrapper } from '../../util/exchange_wrapper';
 import { Order } from '../../util/order';
 import { OrderFactory } from '../../util/order_factory';
+import { SignedOrder } from '../../util/signed_order';
 import { ContractName } from '../../util/types';
 import { chaiSetup } from '../utils/chai_setup';
 import { deployer } from '../utils/deployer';
@@ -25,7 +26,7 @@ describe('Exchange', () => {
     let maker: string;
     let feeRecipient: string;
 
-    let order: Order;
+    let signedOrder: SignedOrder;
     let exchangeWrapper: ExchangeWrapper;
     let orderFactory: OrderFactory;
 
@@ -59,7 +60,7 @@ describe('Exchange', () => {
             takerFee: ZeroEx.toBaseUnitAmount(new BigNumber(1), 18),
         };
         orderFactory = new OrderFactory(web3Wrapper, defaultOrderParams);
-        order = await orderFactory.newSignedOrderAsync();
+        signedOrder = await orderFactory.newSignedOrderAsync();
     });
 
     beforeEach(async () => {
@@ -70,28 +71,28 @@ describe('Exchange', () => {
     });
     describe('getOrderHash', () => {
         it('should output the correct orderHash', async () => {
-            const orderHashHex = await exchangeWrapper.getOrderHashAsync(order);
-            expect(order.getOrderHashHex()).to.be.equal(orderHashHex);
+            const orderHashHex = await exchangeWrapper.getOrderHashAsync(signedOrder);
+            expect(signedOrder.getOrderHashHex()).to.be.equal(orderHashHex);
         });
     });
 
     describe('isValidSignature', () => {
         beforeEach(async () => {
-            order = await orderFactory.newSignedOrderAsync();
+            signedOrder = await orderFactory.newSignedOrderAsync();
         });
 
         it('should return true with a valid signature', async () => {
-            const success = await exchangeWrapper.isValidSignatureAsync(order);
-            const isValidSignature = order.isValidSignature();
+            const success = await exchangeWrapper.isValidSignatureAsync(signedOrder);
+            const isValidSignature = signedOrder.isValidSignature();
             expect(isValidSignature).to.be.true();
             expect(success).to.be.true();
         });
 
         it('should return false with an invalid signature', async () => {
-            order.params.r = ethUtil.bufferToHex(ethUtil.sha3('invalidR'));
-            order.params.s = ethUtil.bufferToHex(ethUtil.sha3('invalidS'));
-            const success = await exchangeWrapper.isValidSignatureAsync(order);
-            expect(order.isValidSignature()).to.be.false();
+            signedOrder.params.r = ethUtil.bufferToHex(ethUtil.sha3('invalidR'));
+            signedOrder.params.s = ethUtil.bufferToHex(ethUtil.sha3('invalidS'));
+            const success = await exchangeWrapper.isValidSignatureAsync(signedOrder);
+            expect(signedOrder.isValidSignature()).to.be.false();
             expect(success).to.be.false();
         });
     });
diff --git a/packages/contracts/test/exchange/wrapper.ts b/packages/contracts/test/exchange/wrapper.ts
index b1851a55c..02d722ed5 100644
--- a/packages/contracts/test/exchange/wrapper.ts
+++ b/packages/contracts/test/exchange/wrapper.ts
@@ -15,6 +15,7 @@ import { constants } from '../../util/constants';
 import { ExchangeWrapper } from '../../util/exchange_wrapper';
 import { Order } from '../../util/order';
 import { OrderFactory } from '../../util/order_factory';
+import { SignedOrder } from '../../util/signed_order';
 import { BalancesByOwner, ContractName } from '../../util/types';
 import { chaiSetup } from '../utils/chai_setup';
 import { deployer } from '../utils/deployer';
@@ -173,7 +174,7 @@ describe('Exchange', () => {
     });
 
     describe('batch functions', () => {
-        let orders: Order[];
+        let orders: SignedOrder[];
         beforeEach(async () => {
             orders = await Promise.all([
                 orderFactory.newSignedOrderAsync(),