diff options
Diffstat (limited to 'packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts')
-rw-r--r-- | packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts b/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts new file mode 100644 index 000000000..9d74da096 --- /dev/null +++ b/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts @@ -0,0 +1,61 @@ +import * as _ from 'lodash'; +import * as Web3 from 'web3'; +import {BigNumber} from 'bignumber.js'; +import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper'; +import {BlockParamLiteral} from '../types'; + +/** + * Copy on read store for filled/cancelled taker amounts + */ +export class OrderFilledCancelledLazyStore { + private exchange: ExchangeWrapper; + private filledTakerAmount: { + [orderHash: string]: BigNumber, + }; + private cancelledTakerAmount: { + [orderHash: string]: BigNumber, + }; + constructor(exchange: ExchangeWrapper) { + this.exchange = exchange; + this.filledTakerAmount = {}; + this.cancelledTakerAmount = {}; + } + public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> { + if (_.isUndefined(this.filledTakerAmount[orderHash])) { + const methodOpts = { + defaultBlock: BlockParamLiteral.Pending, + }; + const filledTakerAmount = await this.exchange.getFilledTakerAmountAsync(orderHash, methodOpts); + this.setFilledTakerAmount(orderHash, filledTakerAmount); + } + const cachedFilled = this.filledTakerAmount[orderHash]; + return cachedFilled; + } + public setFilledTakerAmount(orderHash: string, filledTakerAmount: BigNumber): void { + this.filledTakerAmount[orderHash] = filledTakerAmount; + } + public deleteFilledTakerAmount(orderHash: string): void { + delete this.filledTakerAmount[orderHash]; + } + public async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber> { + if (_.isUndefined(this.cancelledTakerAmount[orderHash])) { + const methodOpts = { + defaultBlock: BlockParamLiteral.Pending, + }; + const cancelledTakerAmount = await this.exchange.getCanceledTakerAmountAsync(orderHash, methodOpts); + this.setCancelledTakerAmount(orderHash, cancelledTakerAmount); + } + const cachedCancelled = this.cancelledTakerAmount[orderHash]; + return cachedCancelled; + } + public setCancelledTakerAmount(orderHash: string, cancelledTakerAmount: BigNumber): void { + this.cancelledTakerAmount[orderHash] = cancelledTakerAmount; + } + public deleteCancelledTakerAmount(orderHash: string): void { + delete this.cancelledTakerAmount[orderHash]; + } + public deleteAll(): void { + this.filledTakerAmount = {}; + this.cancelledTakerAmount = {}; + } +} |