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-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol11
-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol21
-rw-r--r--packages/contracts/src/contracts/current/protocol/Exchange/mixins/MTransactions.sol7
-rw-r--r--packages/contracts/src/utils/crypto.ts2
-rw-r--r--packages/contracts/test/exchange/transactions.ts40
5 files changed, 50 insertions, 31 deletions
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol
index 97c1f1541..80120bc74 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinExchangeCore.sol
@@ -18,7 +18,6 @@
pragma solidity ^0.4.21;
pragma experimental ABIEncoderV2;
-pragma experimental "v0.5.0";
import "./mixins/MExchangeCore.sol";
import "./mixins/MSettlement.sol";
@@ -117,13 +116,13 @@ contract MixinExchangeCore is
require(isValidSignature(orderHash, order.makerAddress, signature));
}
- // Validate sender
+ // Validate sender is allowed to fill this order
if (order.senderAddress != address(0)) {
require(order.senderAddress == msg.sender);
}
- // Validate transaction signed by taker
- address takerAddress = getSignerAddress();
+ // Validate taker is allowed to fill this order
+ address takerAddress = getCurrentContextAddress();
if (order.takerAddress != address(0)) {
require(order.takerAddress == takerAddress);
}
@@ -177,13 +176,13 @@ contract MixinExchangeCore is
require(order.makerAssetAmount > 0);
require(order.takerAssetAmount > 0);
- // Validate sender
+ // Validate sender is allowed to cancel this order
if (order.senderAddress != address(0)) {
require(order.senderAddress == msg.sender);
}
// Validate transaction signed by maker
- address makerAddress = getSignerAddress();
+ address makerAddress = getCurrentContextAddress();
require(order.makerAddress == makerAddress);
if (block.timestamp >= order.expirationTimeSeconds) {
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
index e4fc4767b..9edb1694f 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/MixinTransactions.sol
@@ -27,10 +27,11 @@ contract MixinTransactions is
{
// Mapping of transaction hash => executed
+ // This prevents transactions from being executed more than once.
mapping (bytes32 => bool) public transactions;
// Address of current transaction signer
- address currentSigner;
+ address public currentContextAddress;
/// @dev Executes an exchange method call in the context of signer.
/// @param salt Arbitrary number to ensure uniqueness of transaction hash.
@@ -45,7 +46,7 @@ contract MixinTransactions is
external
{
// Prevent reentrancy
- require(currentSigner == address(0));
+ require(currentContextAddress == address(0));
// Calculate transaction hash
bytes32 transactionHash = keccak256(
@@ -63,7 +64,7 @@ contract MixinTransactions is
require(isValidSignature(transactionHash, signer, signature));
// Set the current transaction signer
- currentSigner = signer;
+ currentContextAddress = signer;
}
// Execute transaction
@@ -71,15 +72,21 @@ contract MixinTransactions is
require(address(this).delegatecall(data));
// Reset current transaction signer
- currentSigner = address(0);
+ // TODO: Check if gas is paid when currentContextAddress is already 0.
+ currentContextAddress = address(0);
}
- function getSignerAddress()
+ /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
+ /// If calling a fill function, this address will represent the taker.
+ /// If calling a cancel function, this address will represent the maker.
+ /// @return Signer of 0x transaction if entry point is `executeTransaction`.
+ /// `msg.sender` if entry point is any other function.
+ function getCurrentContextAddress()
internal
view
returns (address)
{
- address signerAddress = currentSigner == address(0) ? msg.sender : currentSigner;
- return signerAddress;
+ address contextAddress = currentContextAddress == address(0) ? msg.sender : currentContextAddress;
+ return contextAddress;
}
}
diff --git a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MTransactions.sol b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MTransactions.sol
index 31209de02..10bfcb035 100644
--- a/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MTransactions.sol
+++ b/packages/contracts/src/contracts/current/protocol/Exchange/mixins/MTransactions.sol
@@ -34,7 +34,12 @@ contract MTransactions is MSignatureValidator {
bytes signature)
external;
- function getSignerAddress()
+ /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
+ /// If calling a fill function, this address will represent the taker.
+ /// If calling a cancel function, this address will represent the maker.
+ /// @return Signer of 0x transaction if entry point is `executeTransaction`.
+ /// `msg.sender` if entry point is any other function.
+ function getCurrentContextAddress()
internal
view
returns (address);
diff --git a/packages/contracts/src/utils/crypto.ts b/packages/contracts/src/utils/crypto.ts
index 85a37122a..222cb7cca 100644
--- a/packages/contracts/src/utils/crypto.ts
+++ b/packages/contracts/src/utils/crypto.ts
@@ -29,8 +29,6 @@ export const crypto = {
args[i] = new BN(arg.toString(10), 10);
} else if (ethUtil.isValidAddress(arg)) {
argTypes.push('address');
- } else if (arg instanceof Buffer) {
- argTypes.push('bytes');
} else if (_.isString(arg)) {
argTypes.push('string');
} else if (_.isBuffer(arg)) {
diff --git a/packages/contracts/test/exchange/transactions.ts b/packages/contracts/test/exchange/transactions.ts
index 62bba0ab8..2bc078153 100644
--- a/packages/contracts/test/exchange/transactions.ts
+++ b/packages/contracts/test/exchange/transactions.ts
@@ -49,6 +49,7 @@ describe('Exchange transactions', () => {
let erc20Balances: ERC20BalancesByOwner;
let signedOrder: SignedOrder;
+ let signedTx: SignedTransaction;
let order: OrderStruct;
let orderFactory: OrderFactory;
let makerTransactionFactory: TransactionFactory;
@@ -111,33 +112,28 @@ describe('Exchange transactions', () => {
describe('executeTransaction', () => {
describe('fillOrder', () => {
+ let takerAssetFillAmount: BigNumber;
beforeEach(async () => {
erc20Balances = await erc20Wrapper.getBalancesAsync();
signedOrder = orderFactory.newSignedOrder();
order = orderUtils.getOrderStruct(signedOrder);
- });
- it('should throw if not called by specified sender', async () => {
- const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
+ takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
const data = exchange.fillOrder.getABIEncodedTransactionData(
order,
takerAssetFillAmount,
signedOrder.signature,
);
- const signedTx = takerTransactionFactory.newSignedTransaction(data);
+ signedTx = takerTransactionFactory.newSignedTransaction(data);
+ });
+
+ it('should throw if not called by specified sender', async () => {
return expect(exchangeWrapper.executeTransactionAsync(signedTx, takerAddress)).to.be.rejectedWith(
constants.REVERT,
);
});
it('should transfer the correct amounts when signed by taker and called by sender', async () => {
- const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
- const data = exchange.fillOrder.getABIEncodedTransactionData(
- order,
- takerAssetFillAmount,
- signedOrder.signature,
- );
- const signedTx = takerTransactionFactory.newSignedTransaction(data);
await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
const newBalances = await erc20Wrapper.getBalancesAsync();
const makerAssetFillAmount = takerAssetFillAmount
@@ -171,20 +167,34 @@ describe('Exchange transactions', () => {
erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
);
});
+
+ it('should throw if the a 0x transaction with the same transactionHash has already been executed', async () => {
+ await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
+ return expect(exchangeWrapper.executeTransactionAsync(signedTx, senderAddress)).to.be.rejectedWith(
+ constants.REVERT,
+ );
+ });
+
+ it('should reset the currentContextAddress', async () => {
+ await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
+ const currentContextAddress = await exchange.currentContextAddress.callAsync();
+ expect(currentContextAddress).to.equal(ZeroEx.NULL_ADDRESS);
+ });
});
describe('cancelOrder', () => {
- it('should throw if not called by specified sender', async () => {
+ beforeEach(async () => {
const data = exchange.cancelOrder.getABIEncodedTransactionData(order);
- const signedTx = makerTransactionFactory.newSignedTransaction(data);
+ signedTx = makerTransactionFactory.newSignedTransaction(data);
+ });
+
+ it('should throw if not called by specified sender', async () => {
return expect(exchangeWrapper.executeTransactionAsync(signedTx, makerAddress)).to.be.rejectedWith(
constants.REVERT,
);
});
it('should cancel the order when signed by maker and called by sender', async () => {
- const data = exchange.cancelOrder.getABIEncodedTransactionData(order);
- const signedTx = makerTransactionFactory.newSignedTransaction(data);
await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
const res = await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
const newBalances = await erc20Wrapper.getBalancesAsync();