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Convert MetaTransactionsFeature to use the new LibSignature (#31)

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This commit is contained in:
Steve Marx 2020-11-23 16:14:09 -05:00 committed by GitHub
parent 85f5d32de2
commit 5306cc03e9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 101 additions and 80 deletions
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22
contracts/integrations/test/exchange-proxy/mtx_test.ts
View File

@ -6,6 +6,7 @@ import {
artifacts as exchangeProxyArtifacts,
IZeroExContract,
LogMetadataTransformerContract,
Signature,
signCallData,
} from '@0x/contracts-zero-ex';
import { migrateOnceAsync } from '@0x/migrations';
@ -25,6 +26,15 @@ import * as ethjs from 'ethereumjs-util';
const { MAX_UINT256, NULL_ADDRESS, NULL_BYTES, NULL_BYTES32, ZERO_AMOUNT } = constants;
function sigstruct(signature: string): Signature {
return {
v: parseInt(hexUtils.slice(signature, 0, 1), 16),
signatureType: parseInt(hexUtils.slice(signature, 65, 66), 16),
r: hexUtils.slice(signature, 1, 33),
s: hexUtils.slice(signature, 33, 65),
};
}
blockchainTests.resets('exchange proxy - meta-transactions', env => {
const quoteSignerKey = hexUtils.random();
const quoteSigner = hexUtils.toHex(ethjs.privateToAddress(ethjs.toBuffer(quoteSignerKey)));
@ -240,7 +250,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const mtx = await createMetaTransactionAsync(signedSwapData, _protocolFee, 0);
const relayerEthBalanceBefore = await env.web3Wrapper.getBalanceInWeiAsync(relayer);
const receipt = await zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
const relayerEthRefund = relayerEthBalanceBefore
.minus(await env.web3Wrapper.getBalanceInWeiAsync(relayer))
@ -276,7 +286,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const mtx = await createMetaTransactionAsync(signedSwapData, _protocolFee);
const relayerEthBalanceBefore = await env.web3Wrapper.getBalanceInWeiAsync(relayer);
const receipt = await zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
const relayerEthRefund = relayerEthBalanceBefore
.minus(await env.web3Wrapper.getBalanceInWeiAsync(relayer))
@ -311,7 +321,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const mtx = await createMetaTransactionAsync(signedSwapData, _protocolFee);
const relayerEthBalanceBefore = await env.web3Wrapper.getBalanceInWeiAsync(relayer);
const receipt = await zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
const relayerEthRefund = relayerEthBalanceBefore
.minus(await env.web3Wrapper.getBalanceInWeiAsync(relayer))
@ -348,7 +358,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const mtx = await createMetaTransactionAsync(signedSwapData, _protocolFee, 0);
const relayerEthBalanceBefore = await env.web3Wrapper.getBalanceInWeiAsync(relayer);
const receipt = await zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
const relayerEthRefund = relayerEthBalanceBefore
.minus(await env.web3Wrapper.getBalanceInWeiAsync(relayer))
@ -385,7 +395,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const relayerEthBalanceBefore = await env.web3Wrapper.getBalanceInWeiAsync(relayer);
await zeroEx.setQuoteSigner(NULL_ADDRESS).awaitTransactionSuccessAsync({ from: owner });
const receipt = await zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
const relayerEthRefund = relayerEthBalanceBefore
.minus(await env.web3Wrapper.getBalanceInWeiAsync(relayer))
@ -419,7 +429,7 @@ blockchainTests.resets('exchange proxy - meta-transactions', env => {
const _protocolFee = protocolFee.times(GAS_PRICE).times(swap.orders.length + 1); // Pay a little more fee than needed.
const mtx = await createMetaTransactionAsync(callData, _protocolFee, 0);
const tx = zeroEx
.executeMetaTransaction(mtx, mtx.signature)
.executeMetaTransaction(mtx, sigstruct(mtx.signature))
.awaitTransactionSuccessAsync({ from: relayer, value: mtx.value, gasPrice: GAS_PRICE });
return expect(tx).to.revertWith(new ZeroExRevertErrors.MetaTransactions.MetaTransactionCallFailedError());
});

4
contracts/zero-ex/CHANGELOG.json
View File

@ -21,6 +21,10 @@
{
"note": "Add a gas limit to first `LibTokenSpender` and `UniswapFeature` transfer",
"pr": 38
},
{
"note": "Convert metatransactions to use `LibSignature`",
"pr": 31
}
]
},

13
contracts/zero-ex/contracts/src/features/IMetaTransactionsFeature.sol
View File

@ -20,11 +20,10 @@ pragma solidity ^0.6.5;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
import "./libs/LibSignature.sol";
/// @dev Meta-transactions feature.
interface IMetaTransactionsFeature {
/// @dev Describes an exchange proxy meta transaction.
struct MetaTransactionData {
// Signer of meta-transaction. On whose behalf to execute the MTX.
@ -68,7 +67,7 @@ interface IMetaTransactionsFeature {
/// @return returnResult The ABI-encoded result of the underlying call.
function executeMetaTransaction(
MetaTransactionData calldata mtx,
bytes calldata signature
LibSignature.Signature calldata signature
)
external
payable
@ -80,7 +79,7 @@ interface IMetaTransactionsFeature {
/// @return returnResults The ABI-encoded results of the underlying calls.
function batchExecuteMetaTransactions(
MetaTransactionData[] calldata mtxs,
bytes[] calldata signatures
LibSignature.Signature[] calldata signatures
)
external
payable
@ -88,14 +87,14 @@ interface IMetaTransactionsFeature {
/// @dev Execute a meta-transaction via `sender`. Privileged variant.
/// Only callable from within.
/// @param sender Who is executing the meta-transaction..
/// @param sender Who is executing the meta-transaction.
/// @param mtx The meta-transaction.
/// @param signature The signature by `mtx.signer`.
/// @return returnResult The ABI-encoded result of the underlying call.
function _executeMetaTransaction(
address sender,
MetaTransactionData calldata mtx,
bytes calldata signature
MetaTransactionData memory mtx,
LibSignature.Signature memory signature
)
external
payable

97
contracts/zero-ex/contracts/src/features/MetaTransactionsFeature.sol
View File

@ -32,6 +32,7 @@ import "../storage/LibMetaTransactionsStorage.sol";
import "./libs/LibSignedCallData.sol";
import "./IMetaTransactionsFeature.sol";
import "./ITransformERC20Feature.sol";
import "./libs/LibSignature.sol";
import "./ISignatureValidatorFeature.sol";
import "./IFeature.sol";
@ -47,8 +48,8 @@ contract MetaTransactionsFeature is
using LibBytesV06 for bytes;
using LibRichErrorsV06 for bytes;
/// @dev Intermediate state vars used by `_executeMetaTransactionPrivate()`
/// to avoid stack overflows.
/// @dev Describes the state of a meta transaction.
struct ExecuteState {
// Sender of the meta-transaction.
address sender;
@ -57,7 +58,7 @@ contract MetaTransactionsFeature is
// The meta-transaction data.
MetaTransactionData mtx;
// The meta-transaction signature (by `mtx.signer`).
bytes signature;
LibSignature.Signature signature;
// The selector of the function being called.
bytes4 selector;
// The ETH balance of this contract before performing the call.
@ -136,7 +137,7 @@ contract MetaTransactionsFeature is
/// @return returnResult The ABI-encoded result of the underlying call.
function executeMetaTransaction(
MetaTransactionData memory mtx,
bytes memory signature
LibSignature.Signature memory signature
)
public
payable
@ -145,11 +146,13 @@ contract MetaTransactionsFeature is
refundsAttachedEth
returns (bytes memory returnResult)
{
returnResult = _executeMetaTransactionPrivate(
msg.sender,
mtx,
signature
);
ExecuteState memory state;
state.sender = msg.sender;
state.mtx = mtx;
state.hash = getMetaTransactionHash(mtx);
state.signature = signature;
returnResult = _executeMetaTransactionPrivate(state);
}
/// @dev Execute multiple meta-transactions.
@ -158,7 +161,7 @@ contract MetaTransactionsFeature is
/// @return returnResults The ABI-encoded results of the underlying calls.
function batchExecuteMetaTransactions(
MetaTransactionData[] memory mtxs,
bytes[] memory signatures
LibSignature.Signature[] memory signatures
)
public
payable
@ -175,11 +178,13 @@ contract MetaTransactionsFeature is
}
returnResults = new bytes[](mtxs.length);
for (uint256 i = 0; i < mtxs.length; ++i) {
returnResults[i] = _executeMetaTransactionPrivate(
msg.sender,
mtxs[i],
signatures[i]
);
ExecuteState memory state;
state.sender = msg.sender;
state.mtx = mtxs[i];
state.hash = getMetaTransactionHash(mtxs[i]);
state.signature = signatures[i];
returnResults[i] = _executeMetaTransactionPrivate(state);
}
}
@ -192,7 +197,7 @@ contract MetaTransactionsFeature is
function _executeMetaTransaction(
address sender,
MetaTransactionData memory mtx,
bytes memory signature
LibSignature.Signature memory signature
)
public
payable
@ -200,7 +205,13 @@ contract MetaTransactionsFeature is
onlySelf
returns (bytes memory returnResult)
{
return _executeMetaTransactionPrivate(sender, mtx, signature);
ExecuteState memory state;
state.sender = sender;
state.mtx = mtx;
state.hash = getMetaTransactionHash(mtx);
state.signature = signature;
return _executeMetaTransactionPrivate(state);
}
/// @dev Get the block at which a meta-transaction has been executed.
@ -252,24 +263,13 @@ contract MetaTransactionsFeature is
}
/// @dev Execute a meta-transaction by `sender`. Low-level, hidden variant.
/// @param sender Who is executing the meta-transaction..
/// @param mtx The meta-transaction.
/// @param signature The signature by `mtx.signer`.
/// @param state The `ExecuteState` for this metatransaction, with `sender`,
/// `hash`, `mtx`, and `signature` fields filled.
/// @return returnResult The ABI-encoded result of the underlying call.
function _executeMetaTransactionPrivate(
address sender,
MetaTransactionData memory mtx,
bytes memory signature
)
function _executeMetaTransactionPrivate(ExecuteState memory state)
private
returns (bytes memory returnResult)
{
ExecuteState memory state;
state.sender = sender;
state.hash = getMetaTransactionHash(mtx);
state.mtx = mtx;
state.signature = signature;
_validateMetaTransaction(state);
// Mark the transaction executed by storing the block at which it was executed.
@ -279,17 +279,17 @@ contract MetaTransactionsFeature is
.mtxHashToExecutedBlockNumber[state.hash] = block.number;
// Pay the fee to the sender.
if (mtx.feeAmount > 0) {
if (state.mtx.feeAmount > 0) {
_transferERC20Tokens(
mtx.feeToken,
mtx.signer,
sender,
mtx.feeAmount
state.mtx.feeToken,
state.mtx.signer,
state.sender,
state.mtx.feeAmount
);
}
// Execute the call based on the selector.
state.selector = mtx.callData.readBytes4(0);
state.selector = state.mtx.callData.readBytes4(0);
if (state.selector == ITransformERC20Feature.transformERC20.selector) {
returnResult = _executeTransformERC20Call(state);
} else {
@ -300,8 +300,8 @@ contract MetaTransactionsFeature is
emit MetaTransactionExecuted(
state.hash,
state.selector,
mtx.signer,
mtx.sender
state.mtx.signer,
state.mtx.sender
);
}
@ -348,17 +348,16 @@ contract MetaTransactionsFeature is
state.mtx.value
).rrevert();
}
// Must be signed by signer.
try
ISignatureValidatorFeature(address(this))
.validateHashSignature(state.hash, state.mtx.signer, state.signature)
{}
catch (bytes memory err) {
LibMetaTransactionsRichErrors
.MetaTransactionInvalidSignatureError(
if (LibSignature.getSignerOfHash(state.hash, state.signature) !=
state.mtx.signer) {
LibSignatureRichErrors.SignatureValidationError(
LibSignatureRichErrors.SignatureValidationErrorCodes.WRONG_SIGNER,
state.hash,
state.signature,
err
state.mtx.signer,
// TODO: Remove this field from SignatureValidationError
// when rich reverts are part of the protocol repo.
""
).rrevert();
}
// Transaction must not have been already executed.

7
contracts/zero-ex/contracts/test/TestMetaTransactionsTransformERC20Feature.sol
View File

@ -52,6 +52,8 @@ contract TestMetaTransactionsTransformERC20Feature is
}
if (msg.value == 777) {
LibSignature.Signature memory signature;
// Try to reenter `executeMetaTransaction()`
IMetaTransactionsFeature(address(this)).executeMetaTransaction(
IMetaTransactionsFeature.MetaTransactionData({
@ -66,7 +68,7 @@ contract TestMetaTransactionsTransformERC20Feature is
feeToken: IERC20TokenV06(0),
feeAmount: 0
}),
""
signature
);
}
@ -74,7 +76,7 @@ contract TestMetaTransactionsTransformERC20Feature is
// Try to reenter `batchExecuteMetaTransactions()`
IMetaTransactionsFeature.MetaTransactionData[] memory mtxs =
new IMetaTransactionsFeature.MetaTransactionData[](1);
bytes[] memory signatures = new bytes[](1);
LibSignature.Signature[] memory signatures = new LibSignature.Signature[](1);
mtxs[0] = IMetaTransactionsFeature.MetaTransactionData({
signer: address(0),
sender: address(0),
@ -87,7 +89,6 @@ contract TestMetaTransactionsTransformERC20Feature is
feeToken: IERC20TokenV06(0),
feeAmount: 0
});
signatures[0] = "";
IMetaTransactionsFeature(address(this)).batchExecuteMetaTransactions(
mtxs,
signatures

22
contracts/zero-ex/test/features/meta_transactions_test.ts
View File

@ -11,6 +11,7 @@ import { ExchangeProxyMetaTransaction } from '@0x/types';
import { BigNumber, hexUtils, StringRevertError, ZeroExRevertErrors } from '@0x/utils';
import * as _ from 'lodash';
import { Signature } from '../../src/signature_utils';
import { generateCallDataSignature, signCallData } from '../../src/signed_call_data';
import { IZeroExContract, MetaTransactionsFeatureContract } from '../../src/wrappers';
import { artifacts } from '../artifacts';
@ -71,6 +72,15 @@ blockchainTests.resets('MetaTransactions feature', env => {
);
});
function sigstruct(signature: string): Signature {
return {
v: parseInt(hexUtils.slice(signature, 0, 1), 16),
signatureType: parseInt(hexUtils.slice(signature, 65, 66), 16),
r: hexUtils.slice(signature, 1, 33),
s: hexUtils.slice(signature, 33, 65),
};
}
function getRandomMetaTransaction(
fields: Partial<ExchangeProxyMetaTransaction> = {},
): ExchangeProxyMetaTransaction {
@ -93,11 +103,13 @@ blockchainTests.resets('MetaTransactions feature', env => {
};
}
async function signMetaTransactionAsync(mtx: ExchangeProxyMetaTransaction, signer?: string): Promise<string> {
return signatureUtils.ecSignHashAsync(
async function signMetaTransactionAsync(mtx: ExchangeProxyMetaTransaction, signer?: string): Promise<Signature> {
return sigstruct(
await signatureUtils.ecSignHashAsync(
env.provider,
getExchangeProxyMetaTransactionHash(mtx),
signer || mtx.signer,
),
);
}
@ -461,15 +473,11 @@ blockchainTests.resets('MetaTransactions feature', env => {
};
const tx = feature.executeMetaTransaction(mtx, signature).awaitTransactionSuccessAsync(callOpts);
return expect(tx).to.revertWith(
new ZeroExRevertErrors.MetaTransactions.MetaTransactionInvalidSignatureError(
mtxHash,
signature,
new ZeroExRevertErrors.SignatureValidator.SignatureValidationError(
ZeroExRevertErrors.SignatureValidator.SignatureValidationErrorCodes.WrongSigner,
mtxHash,
signers[0],
signature,
).encode(),
'0x',
),
);
});