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author | Alex Browne <stephenalexbrowne@gmail.com> | 2018-09-26 03:54:10 +0800 |
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committer | Fred Carlsen <fred@sjelfull.no> | 2018-12-06 19:04:24 +0800 |
commit | c99b71f35442ba605a7a38f9504697dcae78e571 (patch) | |
tree | 6279c5c2cf6cef8d3b460e0ab4d20fa45618e24c /packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts | |
parent | 0133bec07d84c5b73d17a5b9fd0ab1c2ded88f8c (diff) | |
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Re-organize event parsing and decoding
Diffstat (limited to 'packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts')
-rw-r--r-- | packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts b/packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts new file mode 100644 index 000000000..38ff20595 --- /dev/null +++ b/packages/pipeline/src/data_types/events/event_handlers/exchange_event_handler.ts @@ -0,0 +1,76 @@ +import { ExchangeEventArgs, ExchangeFillEventArgs } from '@0xproject/contract-wrappers'; +import { assetDataUtils } from '@0xproject/order-utils'; +import { AssetProxyId, ERC721AssetData } from '@0xproject/types'; +import { AbiDecoder, BigNumber } from '@0xproject/utils'; +import { AbiDefinition, LogEntry, LogWithDecodedArgs } from 'ethereum-types'; +import * as R from 'ramda'; + +import { ExchangeFillEvent } from '../../../entities/ExchangeFillEvent'; +import { decodeLogEntry } from '../event_utils'; + +import { BaseEventHandler } from './base_event_handler'; + +// TODO(albrow): Union with other exchange event entity types +export type ExchangeEventEntity = ExchangeFillEvent; + +export class ExchangeEventHandler extends BaseEventHandler<ExchangeEventEntity> { + public convertLogEntryToEventEntity(logEntry: LogEntry): ExchangeEventEntity { + const decodedLogEntry = decodeLogEntry<ExchangeEventArgs>(this._abi, logEntry); + return _convertToEntity(decodedLogEntry); + } +} + +export function _convertToEntity(eventLog: LogWithDecodedArgs<ExchangeEventArgs>): ExchangeEventEntity { + switch (eventLog.event) { + case 'Fill': + return _convertToExchangeFillEvent(eventLog as LogWithDecodedArgs<ExchangeFillEventArgs>); + default: + return new ExchangeFillEvent(); + // 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(); +} + +function filterEventLogs( + eventLogs: Array<LogWithDecodedArgs<ExchangeEventArgs>>, +): Array<LogWithDecodedArgs<ExchangeEventArgs>> { + return R.filter(eventLog => eventLog.event === 'Fill', eventLogs); +} |