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author | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-09 19:02:25 +0800 |
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committer | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-09 19:02:25 +0800 |
commit | ea14913b412e78ff458bdfba47182f7363e776e5 (patch) | |
tree | 3ee220bfbbd9923b5e1adc36ee51f9b5d39ad640 /packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts | |
parent | 5868c91cfb54cfa9177572b201d88d1168bf5b06 (diff) | |
parent | 5dd55491b86bf8577405e37d0f2d668aa1273b10 (diff) | |
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Merge development
Diffstat (limited to 'packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts')
-rw-r--r-- | packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts b/packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts new file mode 100644 index 000000000..58691e2ab --- /dev/null +++ b/packages/pipeline/src/data_sources/contract-wrappers/exchange_events.ts @@ -0,0 +1,59 @@ +import { + ContractWrappers, + ExchangeCancelEventArgs, + ExchangeCancelUpToEventArgs, + ExchangeEventArgs, + ExchangeEvents, + ExchangeFillEventArgs, + ExchangeWrapper, +} from '@0x/contract-wrappers'; +import { Web3ProviderEngine } from '@0x/subproviders'; +import { LogWithDecodedArgs } from 'ethereum-types'; + +import { GetEventsFunc, getEventsWithPaginationAsync } from './utils'; + +export class ExchangeEventsSource { + private readonly _exchangeWrapper: ExchangeWrapper; + constructor(provider: Web3ProviderEngine, networkId: number) { + const contractWrappers = new ContractWrappers(provider, { networkId }); + this._exchangeWrapper = contractWrappers.exchange; + } + + public async getFillEventsAsync( + startBlock: number, + endBlock: number, + ): Promise<Array<LogWithDecodedArgs<ExchangeFillEventArgs>>> { + const getFillEventsForRangeAsync = this._makeGetterFuncForEventType<ExchangeFillEventArgs>(ExchangeEvents.Fill); + return getEventsWithPaginationAsync(getFillEventsForRangeAsync, startBlock, endBlock); + } + + public async getCancelEventsAsync( + startBlock: number, + endBlock: number, + ): Promise<Array<LogWithDecodedArgs<ExchangeCancelEventArgs>>> { + const getCancelEventsForRangeAsync = this._makeGetterFuncForEventType<ExchangeCancelEventArgs>( + ExchangeEvents.Cancel, + ); + return getEventsWithPaginationAsync(getCancelEventsForRangeAsync, startBlock, endBlock); + } + + public async getCancelUpToEventsAsync( + startBlock: number, + endBlock: number, + ): Promise<Array<LogWithDecodedArgs<ExchangeCancelUpToEventArgs>>> { + const getCancelUpToEventsForRangeAsync = this._makeGetterFuncForEventType<ExchangeCancelUpToEventArgs>( + ExchangeEvents.CancelUpTo, + ); + return getEventsWithPaginationAsync(getCancelUpToEventsForRangeAsync, startBlock, endBlock); + } + + // Returns a getter function which gets all events of a specific type for a + // specific sub-range. This getter function will be called during each step + // of pagination. + private _makeGetterFuncForEventType<ArgsType extends ExchangeEventArgs>( + eventType: ExchangeEvents, + ): GetEventsFunc<ArgsType> { + return async (fromBlock: number, toBlock: number) => + this._exchangeWrapper.getLogsAsync<ArgsType>(eventType, { fromBlock, toBlock }, {}); + } +} |