diff options
Diffstat (limited to 'packages/pipeline/src/data_types/events/exchange_events.ts')
-rw-r--r-- | packages/pipeline/src/data_types/events/exchange_events.ts | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/packages/pipeline/src/data_types/events/exchange_events.ts b/packages/pipeline/src/data_types/events/exchange_events.ts new file mode 100644 index 000000000..fb5341b58 --- /dev/null +++ b/packages/pipeline/src/data_types/events/exchange_events.ts @@ -0,0 +1,75 @@ +import { ExchangeEventArgs, ExchangeFillEventArgs } from '@0xproject/contract-wrappers'; +import { assetDataUtils } from '@0xproject/order-utils'; +import { AssetProxyId, ERC721AssetData } from '@0xproject/types'; +import { BigNumber } from '@0xproject/utils'; +import { LogWithDecodedArgs } from 'ethereum-types'; +import * as R from 'ramda'; + +import { artifacts } from '../../artifacts'; +import { EventsResponse } from '../../data_sources/etherscan'; +import { ExchangeFillEvent } from '../../entities/ExchangeFillEvent'; + +import { convertResponseToLogEntry, decodeLogEntry } from './event_utils'; + +// TODO(albrow): Union with other exchange event entity types +export type ExchangeEventEntity = ExchangeFillEvent; + +const exchangeContractAbi = artifacts.Exchange.compilerOutput.abi; + +export function parseExchangeEvents(rawEventsResponse: EventsResponse): ExchangeEventEntity[] { + const logEntries = R.map(convertResponseToLogEntry, rawEventsResponse.result); + const decodedLogEntries = R.map( + eventResponse => decodeLogEntry<ExchangeEventArgs>(exchangeContractAbi, eventResponse), + logEntries, + ); + const filteredLogEntries = R.filter(logEntry => R.contains(logEntry.event, ['Fill']), decodedLogEntries); + return R.map(_convertToEntity, filteredLogEntries); +} + +export function _convertToEntity(eventLog: LogWithDecodedArgs<ExchangeEventArgs>): ExchangeEventEntity { + switch (eventLog.event) { + case 'Fill': + return _convertToExchangeFillEvent(eventLog as LogWithDecodedArgs<ExchangeFillEventArgs>); + default: + throw new Error('unexpected eventLog.event type: ' + eventLog.event); + } +} + +export function _convertToExchangeFillEvent(eventLog: LogWithDecodedArgs<ExchangeFillEventArgs>): ExchangeFillEvent { + const makerAssetData = assetDataUtils.decodeAssetDataOrThrow(eventLog.args.makerAssetData); + const makerAssetType = makerAssetData.assetProxyId === AssetProxyId.ERC20 ? 'erc20' : 'erc721'; + const takerAssetData = assetDataUtils.decodeAssetDataOrThrow(eventLog.args.takerAssetData); + const takerAssetType = takerAssetData.assetProxyId === AssetProxyId.ERC20 ? 'erc20' : 'erc721'; + const exchangeFillEvent = new ExchangeFillEvent(); + exchangeFillEvent.logIndex = eventLog.logIndex as number; + exchangeFillEvent.address = eventLog.address as string; + exchangeFillEvent.rawData = eventLog.data as string; + exchangeFillEvent.blockNumber = eventLog.blockNumber as number; + exchangeFillEvent.makerAddress = eventLog.args.makerAddress.toString(); + exchangeFillEvent.takerAddress = eventLog.args.takerAddress.toString(); + exchangeFillEvent.feeRecepientAddress = eventLog.args.feeRecipientAddress; + exchangeFillEvent.senderAddress = eventLog.args.senderAddress; + exchangeFillEvent.makerAssetFilledAmount = eventLog.args.makerAssetFilledAmount.toString(); + exchangeFillEvent.takerAssetFilledAmount = eventLog.args.takerAssetFilledAmount.toString(); + exchangeFillEvent.makerFeePaid = eventLog.args.makerFeePaid.toString(); + exchangeFillEvent.takerFeePaid = eventLog.args.takerFeePaid.toString(); + exchangeFillEvent.orderHash = eventLog.args.orderHash; + exchangeFillEvent.rawMakerAssetData = eventLog.args.makerAssetData; + exchangeFillEvent.makerAssetType = makerAssetType; + exchangeFillEvent.makerAssetProxyId = makerAssetData.assetProxyId; + exchangeFillEvent.makerTokenAddress = makerAssetData.tokenAddress; + exchangeFillEvent.makerTokenId = bigNumbertoStringOrNull((makerAssetData as ERC721AssetData).tokenId); + exchangeFillEvent.rawTakerAssetData = eventLog.args.takerAssetData; + exchangeFillEvent.takerAssetType = takerAssetType; + exchangeFillEvent.takerAssetProxyId = takerAssetData.assetProxyId; + exchangeFillEvent.takerTokenAddress = takerAssetData.tokenAddress; + exchangeFillEvent.takerTokenId = bigNumbertoStringOrNull((takerAssetData as ERC721AssetData).tokenId); + return exchangeFillEvent; +} + +function bigNumbertoStringOrNull(n: BigNumber): string | null { + if (n == null) { + return null; + } + return n.toString(); +} |