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author | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-08 19:23:33 +0800 |
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committer | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-08 21:48:06 +0800 |
commit | 2c974b5f3ffa0e9736000273e39cdeee4a251b94 (patch) | |
tree | a1772f93d796e3b4ba7a988194a44a3e8bcd6d31 /packages/sol-cov/src/trace_collection_subprovider.ts | |
parent | 0ac36cef288deecd36caa601c53d13517eef5ca8 (diff) | |
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Refactor out sol-cov, sol-profiler and sol-trace into their separate packages
Diffstat (limited to 'packages/sol-cov/src/trace_collection_subprovider.ts')
-rw-r--r-- | packages/sol-cov/src/trace_collection_subprovider.ts | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/packages/sol-cov/src/trace_collection_subprovider.ts b/packages/sol-cov/src/trace_collection_subprovider.ts deleted file mode 100644 index 25e38768d..000000000 --- a/packages/sol-cov/src/trace_collection_subprovider.ts +++ /dev/null @@ -1,188 +0,0 @@ -import { BlockchainLifecycle } from '@0x/dev-utils'; -import { Callback, ErrorCallback, NextCallback, Subprovider } from '@0x/subproviders'; -import { CallDataRPC, marshaller, Web3Wrapper } from '@0x/web3-wrapper'; -import { JSONRPCRequestPayload, Provider, TxData } from 'ethereum-types'; -import * as _ from 'lodash'; -import { Lock } from 'semaphore-async-await'; - -import { constants } from './constants'; -import { BlockParamLiteral } from './types'; - -interface MaybeFakeTxData extends TxData { - isFakeTransaction?: boolean; -} - -const BLOCK_GAS_LIMIT = 6000000; - -export interface TraceCollectionSubproviderConfig { - shouldCollectTransactionTraces: boolean; - shouldCollectCallTraces: boolean; - shouldCollectGasEstimateTraces: boolean; -} - -// Because there is no notion of a call trace in the Ethereum rpc - we collect them in a rather non-obvious/hacky way. -// On each call - we create a snapshot, execute the call as a transaction, get the trace, revert the snapshot. -// That allows us to avoid influencing test behaviour. - -/** - * This class implements the [web3-provider-engine](https://github.com/MetaMask/provider-engine) subprovider interface. - * It collects traces of all transactions that were sent and all calls that were executed through JSON RPC. It must - * be extended by implementing the _recordTxTraceAsync method which is called for every transaction. - */ -export abstract class TraceCollectionSubprovider extends Subprovider { - protected _web3Wrapper!: Web3Wrapper; - // Lock is used to not accept normal transactions while doing call/snapshot magic because they'll be reverted later otherwise - private readonly _lock = new Lock(); - private readonly _defaultFromAddress: string; - private _isEnabled = true; - private readonly _config: TraceCollectionSubproviderConfig; - /** - * Instantiates a TraceCollectionSubprovider instance - * @param defaultFromAddress default from address to use when sending transactions - */ - constructor(defaultFromAddress: string, config: TraceCollectionSubproviderConfig) { - super(); - this._defaultFromAddress = defaultFromAddress; - this._config = config; - } - /** - * Starts trace collection - */ - public start(): void { - this._isEnabled = true; - } - /** - * Stops trace collection - */ - public stop(): void { - this._isEnabled = false; - } - /** - * This method conforms to the web3-provider-engine interface. - * It is called internally by the ProviderEngine when it is this subproviders - * turn to handle a JSON RPC request. - * @param payload JSON RPC payload - * @param next Callback to call if this subprovider decides not to handle the request - * @param _end Callback to call if subprovider handled the request and wants to pass back the request. - */ - // tslint:disable-next-line:prefer-function-over-method async-suffix - public async handleRequest(payload: JSONRPCRequestPayload, next: NextCallback, _end: ErrorCallback): Promise<void> { - if (this._isEnabled) { - switch (payload.method) { - case 'eth_sendTransaction': - if (!this._config.shouldCollectTransactionTraces) { - next(); - } else { - const txData = payload.params[0]; - next(this._onTransactionSentAsync.bind(this, txData)); - } - return; - - case 'eth_call': - if (!this._config.shouldCollectCallTraces) { - next(); - } else { - const callData = payload.params[0]; - next(this._onCallOrGasEstimateExecutedAsync.bind(this, callData)); - } - return; - - case 'eth_estimateGas': - if (!this._config.shouldCollectGasEstimateTraces) { - next(); - } else { - const estimateGasData = payload.params[0]; - next(this._onCallOrGasEstimateExecutedAsync.bind(this, estimateGasData)); - } - return; - - default: - next(); - return; - } - } else { - next(); - return; - } - } - /** - * Set's the subprovider's engine to the ProviderEngine it is added to. - * This is only called within the ProviderEngine source code, do not call - * directly. - * @param engine The ProviderEngine this subprovider is added to - */ - public setEngine(engine: Provider): void { - super.setEngine(engine); - this._web3Wrapper = new Web3Wrapper(engine); - } - protected abstract async _recordTxTraceAsync( - address: string, - data: string | undefined, - txHash: string, - ): Promise<void>; - private async _onTransactionSentAsync( - txData: MaybeFakeTxData, - err: Error | null, - txHash: string | undefined, - cb: Callback, - ): Promise<void> { - if (!txData.isFakeTransaction) { - // This transaction is a usual transaction. Not a call executed as one. - // And we don't want it to be executed within a snapshotting period - await this._lock.acquire(); - } - const NULL_ADDRESS = '0x0'; - if (_.isNull(err)) { - const toAddress = - _.isUndefined(txData.to) || txData.to === NULL_ADDRESS ? constants.NEW_CONTRACT : txData.to; - await this._recordTxTraceAsync(toAddress, txData.data, txHash as string); - } else { - const latestBlock = await this._web3Wrapper.getBlockWithTransactionDataAsync(BlockParamLiteral.Latest); - const transactions = latestBlock.transactions; - for (const transaction of transactions) { - const toAddress = - _.isUndefined(txData.to) || txData.to === NULL_ADDRESS ? constants.NEW_CONTRACT : txData.to; - await this._recordTxTraceAsync(toAddress, transaction.input, transaction.hash); - } - } - if (!txData.isFakeTransaction) { - // This transaction is a usual transaction. Not a call executed as one. - // And we don't want it to be executed within a snapshotting period - this._lock.release(); - } - cb(); - } - private async _onCallOrGasEstimateExecutedAsync( - callData: Partial<CallDataRPC>, - _err: Error | null, - _callResult: string, - cb: Callback, - ): Promise<void> { - await this._recordCallOrGasEstimateTraceAsync(callData); - cb(); - } - private async _recordCallOrGasEstimateTraceAsync(callData: Partial<CallDataRPC>): Promise<void> { - // We don't want other transactions to be exeucted during snashotting period, that's why we lock the - // transaction execution for all transactions except our fake ones. - await this._lock.acquire(); - const blockchainLifecycle = new BlockchainLifecycle(this._web3Wrapper); - await blockchainLifecycle.startAsync(); - const fakeTxData = { - gas: BLOCK_GAS_LIMIT.toString(16), // tslint:disable-line:custom-no-magic-numbers - isFakeTransaction: true, // This transaction (and only it) is allowed to come through when the lock is locked - ...callData, - from: callData.from || this._defaultFromAddress, - }; - try { - const txData = marshaller.unmarshalTxData(fakeTxData); - const txHash = await this._web3Wrapper.sendTransactionAsync(txData); - await this._web3Wrapper.awaitTransactionMinedAsync(txHash, 0); - } catch (err) { - // TODO(logvinov) Check that transaction failed and not some other exception - // Even if this transaction failed - we've already recorded it's trace. - _.noop(); - } - await blockchainLifecycle.revertAsync(); - this._lock.release(); - } -} |