diff options
13 files changed, 370 insertions, 6 deletions
diff --git a/packages/contracts/compiler.json b/packages/contracts/compiler.json index 16524231c..27bb69a36 100644 --- a/packages/contracts/compiler.json +++ b/packages/contracts/compiler.json @@ -47,6 +47,7 @@ "TestLibs", "TestExchangeInternals", "TestSignatureValidator", + "TestStaticCallReceiver", "TokenRegistry", "Validator", "Wallet", diff --git a/packages/contracts/package.json b/packages/contracts/package.json index 10ab09767..0ead2f43f 100644 --- a/packages/contracts/package.json +++ b/packages/contracts/package.json @@ -33,7 +33,8 @@ "lint-contracts": "solhint src/2.0.0/**/**/**/**/*.sol" }, "config": { - "abis": "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyNoReturnERC20Token|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|Validator|Wallet|TokenRegistry|Whitelist|WETH9|ZRXToken).json" + "abis": + "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyNoReturnERC20Token|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|TokenRegistry|Whitelist|WETH9|ZRXToken).json" }, "repository": { "type": "git", diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol index b5cec6b64..004c3892d 100644 --- a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol @@ -118,6 +118,9 @@ contract ERC20Proxy is mstore(96, 0) revert(0, 100) } + + // Revert if undefined function is called + revert(0, 0) } } diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol index 6a70c9f60..9d0bc0f74 100644 --- a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol +++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol @@ -152,6 +152,9 @@ contract ERC721Proxy is mstore(96, 0) revert(0, 100) } + + // Revert if undefined function is called + revert(0, 0) } } diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol index 44de54817..017da742e 100644 --- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol +++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol @@ -191,7 +191,11 @@ contract MixinSignatureValidator is // Signature verified by wallet contract. // If used with an order, the maker of the order is the wallet contract. } else if (signatureType == SignatureType.Wallet) { - isValid = IWallet(signerAddress).isValidSignature(hash, signature); + isValid = isValidWalletSignature( + hash, + signerAddress, + signature + ); return isValid; // Signature verified by validator contract. @@ -209,7 +213,8 @@ contract MixinSignatureValidator is if (!allowedValidators[signerAddress][validatorAddress]) { return false; } - isValid = IValidator(validatorAddress).isValidSignature( + isValid = isValidValidatorSignature( + validatorAddress, hash, signerAddress, signature @@ -257,4 +262,102 @@ contract MixinSignatureValidator is // signature was invalid.) revert("SIGNATURE_UNSUPPORTED"); } + + /// @dev Verifies signature using logic defined by Wallet contract. + /// @param hash Any 32 byte hash. + /// @param walletAddress Address that should have signed the given hash + /// and defines its own signature verification method. + /// @param signature Proof that the hash has been signed by signer. + /// @return True if signature is valid for given wallet.. + function isValidWalletSignature( + bytes32 hash, + address walletAddress, + bytes signature + ) + internal + view + returns (bool isValid) + { + bytes memory calldata = abi.encodeWithSelector( + IWallet(walletAddress).isValidSignature.selector, + hash, + signature + ); + assembly { + let cdStart := add(calldata, 32) + let success := staticcall( + gas, // forward all gas + walletAddress, // address of Wallet contract + cdStart, // pointer to start of input + mload(calldata), // length of input + cdStart, // write input over output + 32 // output size is 32 bytes + ) + + switch success + case 0 { + // Revert with `Error("WALLET_ERROR")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000000c57414c4c45545f4552524f5200000000000000000000000000000000) + mstore(96, 0) + revert(0, 100) + } + case 1 { + // Signature is valid if call did not revert and returned true + isValid := mload(cdStart) + } + } + return isValid; + } + + /// @dev Verifies signature using logic defined by Validator contract. + /// @param validatorAddress Address of validator contract. + /// @param hash Any 32 byte hash. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof that the hash has been signed by signer. + /// @return True if the address recovered from the provided signature matches the input signer address. + function isValidValidatorSignature( + address validatorAddress, + bytes32 hash, + address signerAddress, + bytes signature + ) + internal + view + returns (bool isValid) + { + bytes memory calldata = abi.encodeWithSelector( + IValidator(signerAddress).isValidSignature.selector, + hash, + signerAddress, + signature + ); + assembly { + let cdStart := add(calldata, 32) + let success := staticcall( + gas, // forward all gas + validatorAddress, // address of Validator contract + cdStart, // pointer to start of input + mload(calldata), // length of input + cdStart, // write input over output + 32 // output size is 32 bytes + ) + + switch success + case 0 { + // Revert with `Error("VALIDATOR_ERROR")` + mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) + mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000) + mstore(64, 0x0000000f56414c494441544f525f4552524f5200000000000000000000000000) + mstore(96, 0) + revert(0, 100) + } + case 1 { + // Signature is valid if call did not revert and returned true + isValid := mload(cdStart) + } + } + return isValid; + } } diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol index f14f2ba00..75fe9ec46 100644 --- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol +++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol @@ -43,4 +43,35 @@ contract MSignatureValidator is Trezor, // 0x08 NSignatureTypes // 0x09, number of signature types. Always leave at end. } + + /// @dev Verifies signature using logic defined by Wallet contract. + /// @param hash Any 32 byte hash. + /// @param walletAddress Address that should have signed the given hash + /// and defines its own signature verification method. + /// @param signature Proof that the hash has been signed by signer. + /// @return True if the address recovered from the provided signature matches the input signer address. + function isValidWalletSignature( + bytes32 hash, + address walletAddress, + bytes signature + ) + internal + view + returns (bool isValid); + + /// @dev Verifies signature using logic defined by Validator contract. + /// @param validatorAddress Address of validator contract. + /// @param hash Any 32 byte hash. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof that the hash has been signed by signer. + /// @return True if the address recovered from the provided signature matches the input signer address. + function isValidValidatorSignature( + address validatorAddress, + bytes32 hash, + address signerAddress, + bytes signature + ) + internal + view + returns (bool isValid); } diff --git a/packages/contracts/src/2.0.0/test/TestStaticCallReceiver/TestStaticCallReceiver.sol b/packages/contracts/src/2.0.0/test/TestStaticCallReceiver/TestStaticCallReceiver.sol new file mode 100644 index 000000000..41aab01c8 --- /dev/null +++ b/packages/contracts/src/2.0.0/test/TestStaticCallReceiver/TestStaticCallReceiver.sol @@ -0,0 +1,81 @@ +/* + + Copyright 2018 ZeroEx Intl. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + +*/ + +pragma solidity 0.4.24; + +import "../../tokens/ERC20Token/IERC20Token.sol"; + + +// solhint-disable no-unused-vars +contract TestStaticCallReceiver { + + uint256 internal state = 1; + + /// @dev Updates state and returns true. Intended to be used with `Validator` signature type. + /// @param hash Message hash that is signed. + /// @param signerAddress Address that should have signed the given hash. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + address signerAddress, + bytes signature + ) + external + returns (bool isValid) + { + updateState(); + return true; + } + + /// @dev Updates state and returns true. Intended to be used with `Wallet` signature type. + /// @param hash Message hash that is signed. + /// @param signature Proof of signing. + /// @return Validity of order signature. + function isValidSignature( + bytes32 hash, + bytes signature + ) + external + returns (bool isValid) + { + updateState(); + return true; + } + + /// @dev Approves an ERC20 token to spend tokens from this address. + /// @param token Address of ERC20 token. + /// @param spender Address that will spend tokens. + /// @param value Amount of tokens spender is approved to spend. + function approveERC20( + address token, + address spender, + uint256 value + ) + external + { + IERC20Token(token).approve(spender, value); + } + + /// @dev Increments state variable. + function updateState() + internal + { + state++; + } +} diff --git a/packages/contracts/test/asset_proxy/proxies.ts b/packages/contracts/test/asset_proxy/proxies.ts index 76a020222..6031e554d 100644 --- a/packages/contracts/test/asset_proxy/proxies.ts +++ b/packages/contracts/test/asset_proxy/proxies.ts @@ -12,7 +12,7 @@ import { ERC20ProxyContract } from '../../generated_contract_wrappers/erc20_prox import { ERC721ProxyContract } from '../../generated_contract_wrappers/erc721_proxy'; import { IAssetProxyContract } from '../../generated_contract_wrappers/i_asset_proxy'; import { artifacts } from '../utils/artifacts'; -import { expectTransactionFailedAsync } from '../utils/assertions'; +import { expectTransactionFailedAsync, expectTransactionFailedWithoutReasonAsync } from '../utils/assertions'; import { chaiSetup } from '../utils/chai_setup'; import { constants } from '../utils/constants'; import { ERC20Wrapper } from '../utils/erc20_wrapper'; @@ -99,6 +99,17 @@ describe('Asset Transfer Proxies', () => { await blockchainLifecycle.revertAsync(); }); describe('Transfer Proxy - ERC20', () => { + it('should revert if undefined function is called', async () => { + const undefinedSelector = '0x01020304'; + await expectTransactionFailedWithoutReasonAsync( + web3Wrapper.sendTransactionAsync({ + from: owner, + to: erc20Proxy.address, + value: constants.ZERO_AMOUNT, + data: undefinedSelector, + }), + ); + }); describe('transferFrom', () => { it('should successfully transfer tokens', async () => { // Construct ERC20 asset data @@ -219,6 +230,17 @@ describe('Asset Transfer Proxies', () => { }); describe('Transfer Proxy - ERC721', () => { + it('should revert if undefined function is called', async () => { + const undefinedSelector = '0x01020304'; + await expectTransactionFailedWithoutReasonAsync( + web3Wrapper.sendTransactionAsync({ + from: owner, + to: erc721Proxy.address, + value: constants.ZERO_AMOUNT, + data: undefinedSelector, + }), + ); + }); describe('transferFrom', () => { it('should successfully transfer tokens', async () => { // Construct ERC721 asset data diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts index bc2bad749..f9d8b7783 100644 --- a/packages/contracts/test/exchange/core.ts +++ b/packages/contracts/test/exchange/core.ts @@ -1,6 +1,6 @@ import { BlockchainLifecycle } from '@0xproject/dev-utils'; import { assetDataUtils, orderHashUtils } from '@0xproject/order-utils'; -import { RevertReason, SignedOrder } from '@0xproject/types'; +import { RevertReason, SignatureType, SignedOrder } from '@0xproject/types'; import { BigNumber } from '@0xproject/utils'; import { Web3Wrapper } from '@0xproject/web3-wrapper'; import * as chai from 'chai'; @@ -14,6 +14,7 @@ import { DummyNoReturnERC20TokenContract } from '../../generated_contract_wrappe import { ERC20ProxyContract } from '../../generated_contract_wrappers/erc20_proxy'; import { ERC721ProxyContract } from '../../generated_contract_wrappers/erc721_proxy'; import { ExchangeCancelEventArgs, ExchangeContract } from '../../generated_contract_wrappers/exchange'; +import { TestStaticCallReceiverContract } from '../../generated_contract_wrappers/test_static_call_receiver'; import { artifacts } from '../utils/artifacts'; import { expectTransactionFailedAsync } from '../utils/assertions'; import { getLatestBlockTimestampAsync, increaseTimeAndMineBlockAsync } from '../utils/block_timestamp'; @@ -44,6 +45,8 @@ describe('Exchange core', () => { let exchange: ExchangeContract; let erc20Proxy: ERC20ProxyContract; let erc721Proxy: ERC721ProxyContract; + let maliciousWallet: TestStaticCallReceiverContract; + let maliciousValidator: TestStaticCallReceiverContract; let signedOrder: SignedOrder; let erc20Balances: ERC20BalancesByOwner; @@ -109,6 +112,12 @@ describe('Exchange core', () => { constants.AWAIT_TRANSACTION_MINED_MS, ); + maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync( + artifacts.TestStaticCallReceiver, + provider, + txDefaults, + ); + defaultMakerAssetAddress = erc20TokenA.address; defaultTakerAssetAddress = erc20TokenB.address; @@ -161,6 +170,51 @@ describe('Exchange core', () => { RevertReason.OrderUnfillable, ); }); + + it('should revert if `isValidSignature` tries to update state when SignatureType=Wallet', async () => { + const maliciousMakerAddress = maliciousWallet.address; + await web3Wrapper.awaitTransactionSuccessAsync( + await erc20TokenA.setBalance.sendTransactionAsync( + maliciousMakerAddress, + constants.INITIAL_ERC20_BALANCE, + ), + constants.AWAIT_TRANSACTION_MINED_MS, + ); + await web3Wrapper.awaitTransactionSuccessAsync( + await maliciousWallet.approveERC20.sendTransactionAsync( + erc20TokenA.address, + erc20Proxy.address, + constants.INITIAL_ERC20_ALLOWANCE, + ), + constants.AWAIT_TRANSACTION_MINED_MS, + ); + signedOrder = await orderFactory.newSignedOrderAsync({ + makerAddress: maliciousMakerAddress, + makerFee: constants.ZERO_AMOUNT, + }); + signedOrder.signature = `0x0${SignatureType.Wallet}`; + await expectTransactionFailedAsync( + exchangeWrapper.fillOrderAsync(signedOrder, takerAddress), + RevertReason.WalletError, + ); + }); + + it('should revert if `isValidSignature` tries to update state when SignatureType=Validator', async () => { + const isApproved = true; + await web3Wrapper.awaitTransactionSuccessAsync( + await exchange.setSignatureValidatorApproval.sendTransactionAsync( + maliciousValidator.address, + isApproved, + { from: makerAddress }, + ), + constants.AWAIT_TRANSACTION_MINED_MS, + ); + signedOrder.signature = `${maliciousValidator.address}0${SignatureType.Validator}`; + await expectTransactionFailedAsync( + exchangeWrapper.fillOrderAsync(signedOrder, takerAddress), + RevertReason.ValidatorError, + ); + }); }); describe('Testing exchange of ERC20 tokens with no return values', () => { diff --git a/packages/contracts/test/exchange/signature_validator.ts b/packages/contracts/test/exchange/signature_validator.ts index cd4f3d6f3..5b64d853c 100644 --- a/packages/contracts/test/exchange/signature_validator.ts +++ b/packages/contracts/test/exchange/signature_validator.ts @@ -9,11 +9,12 @@ import { TestSignatureValidatorContract, TestSignatureValidatorSignatureValidatorApprovalEventArgs, } from '../../generated_contract_wrappers/test_signature_validator'; +import { TestStaticCallReceiverContract } from '../../generated_contract_wrappers/test_static_call_receiver'; import { ValidatorContract } from '../../generated_contract_wrappers/validator'; import { WalletContract } from '../../generated_contract_wrappers/wallet'; import { addressUtils } from '../utils/address_utils'; import { artifacts } from '../utils/artifacts'; -import { expectContractCallFailed } from '../utils/assertions'; +import { expectContractCallFailed, expectContractCallFailedWithoutReasonAsync } from '../utils/assertions'; import { chaiSetup } from '../utils/chai_setup'; import { constants } from '../utils/constants'; import { LogDecoder } from '../utils/log_decoder'; @@ -31,6 +32,8 @@ describe('MixinSignatureValidator', () => { let signatureValidator: TestSignatureValidatorContract; let testWallet: WalletContract; let testValidator: ValidatorContract; + let maliciousWallet: TestStaticCallReceiverContract; + let maliciousValidator: TestStaticCallReceiverContract; let signerAddress: string; let signerPrivateKey: Buffer; let notSignerAddress: string; @@ -65,6 +68,11 @@ describe('MixinSignatureValidator', () => { txDefaults, signerAddress, ); + maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync( + artifacts.TestStaticCallReceiver, + provider, + txDefaults, + ); signatureValidatorLogDecoder = new LogDecoder(web3Wrapper); await web3Wrapper.awaitTransactionSuccessAsync( await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(testValidator.address, true, { @@ -72,6 +80,16 @@ describe('MixinSignatureValidator', () => { }), constants.AWAIT_TRANSACTION_MINED_MS, ); + await web3Wrapper.awaitTransactionSuccessAsync( + await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync( + maliciousValidator.address, + true, + { + from: signerAddress, + }, + ), + constants.AWAIT_TRANSACTION_MINED_MS, + ); const defaultOrderParams = { ...constants.STATIC_ORDER_PARAMS, @@ -334,6 +352,29 @@ describe('MixinSignatureValidator', () => { expect(isValidSignature).to.be.false(); }); + it('should revert when `isValidSignature` attempts to update state and SignatureType=Wallet', async () => { + // Create EIP712 signature + const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder); + const orderHashBuffer = ethUtil.toBuffer(orderHashHex); + const ecSignature = ethUtil.ecsign(orderHashBuffer, signerPrivateKey); + // Create 0x signature from EIP712 signature + const signature = Buffer.concat([ + ethUtil.toBuffer(ecSignature.v), + ecSignature.r, + ecSignature.s, + ethUtil.toBuffer(`0x${SignatureType.Wallet}`), + ]); + const signatureHex = ethUtil.bufferToHex(signature); + await expectContractCallFailed( + signatureValidator.publicIsValidSignature.callAsync( + orderHashHex, + maliciousWallet.address, + signatureHex, + ), + RevertReason.WalletError, + ); + }); + it('should return true when SignatureType=Validator, signature is valid and validator is approved', async () => { const validatorAddress = ethUtil.toBuffer(`${testValidator.address}`); const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`); @@ -364,6 +405,17 @@ describe('MixinSignatureValidator', () => { expect(isValidSignature).to.be.false(); }); + it('should revert when `isValidSignature` attempts to update state and SignatureType=Validator', async () => { + const validatorAddress = ethUtil.toBuffer(`${maliciousValidator.address}`); + const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`); + const signature = Buffer.concat([validatorAddress, signatureType]); + const signatureHex = ethUtil.bufferToHex(signature); + const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder); + await expectContractCallFailed( + signatureValidator.publicIsValidSignature.callAsync(orderHashHex, signerAddress, signatureHex), + RevertReason.ValidatorError, + ); + }); it('should return false when SignatureType=Validator, signature is valid and validator is not approved', async () => { // Set approval of signature validator to false await web3Wrapper.awaitTransactionSuccessAsync( diff --git a/packages/contracts/test/utils/artifacts.ts b/packages/contracts/test/utils/artifacts.ts index e8a7585ac..2f6fcef71 100644 --- a/packages/contracts/test/utils/artifacts.ts +++ b/packages/contracts/test/utils/artifacts.ts @@ -23,6 +23,7 @@ import * as TestExchangeInternals from '../../artifacts/TestExchangeInternals.js import * as TestLibBytes from '../../artifacts/TestLibBytes.json'; import * as TestLibs from '../../artifacts/TestLibs.json'; import * as TestSignatureValidator from '../../artifacts/TestSignatureValidator.json'; +import * as TestStaticCallReceiver from '../../artifacts/TestStaticCallReceiver.json'; import * as TokenRegistry from '../../artifacts/TokenRegistry.json'; import * as Validator from '../../artifacts/Validator.json'; import * as Wallet from '../../artifacts/Wallet.json'; @@ -55,6 +56,7 @@ export const artifacts = { TestLibs: (TestLibs as any) as ContractArtifact, TestExchangeInternals: (TestExchangeInternals as any) as ContractArtifact, TestSignatureValidator: (TestSignatureValidator as any) as ContractArtifact, + TestStaticCallReceiver: (TestStaticCallReceiver as any) as ContractArtifact, Validator: (Validator as any) as ContractArtifact, Wallet: (Wallet as any) as ContractArtifact, TokenRegistry: (TokenRegistry as any) as ContractArtifact, diff --git a/packages/types/CHANGELOG.json b/packages/types/CHANGELOG.json index fabc80ecf..980a12ad3 100644 --- a/packages/types/CHANGELOG.json +++ b/packages/types/CHANGELOG.json @@ -1,5 +1,14 @@ [ { + "version": "1.0.1-rc.6", + "changes": [ + { + "note": "Add WalletError and ValidatorError revert reasons", + "pr": 1012 + } + ] + }, + { "version": "1.0.1-rc.5", "changes": [ { diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts index 298fa77d4..2831d816d 100644 --- a/packages/types/src/index.ts +++ b/packages/types/src/index.ts @@ -220,6 +220,8 @@ export enum RevertReason { Erc721InvalidSpender = 'ERC721_INVALID_SPENDER', Erc721ZeroOwner = 'ERC721_ZERO_OWNER', Erc721InvalidSelector = 'ERC721_INVALID_SELECTOR', + WalletError = 'WALLET_ERROR', + ValidatorError = 'VALIDATOR_ERROR', } export enum StatusCodes { |