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import { AbstractOrderFilledCancelledFetcher } from '@0xproject/order-utils';
import { BlockParamLiteral } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
/**
* Copy on read store for filled/cancelled taker amounts
*/
export class OrderFilledCancelledLazyStore implements AbstractOrderFilledCancelledFetcher {
private _exchangeWrapper: ExchangeWrapper;
private _defaultBlock: BlockParamLiteral;
private _filledTakerAmount: {
[orderHash: string]: BigNumber;
};
private _cancelledTakerAmount: {
[orderHash: string]: BigNumber;
};
constructor(exchange: ExchangeWrapper, defaultBlock: BlockParamLiteral) {
this._exchangeWrapper = exchange;
this._defaultBlock = defaultBlock;
this._filledTakerAmount = {};
this._cancelledTakerAmount = {};
}
public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
if (_.isUndefined(this._filledTakerAmount[orderHash])) {
const methodOpts = {
defaultBlock: this._defaultBlock,
};
const filledTakerAmount = await this._exchangeWrapper.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: this._defaultBlock,
};
const cancelledTakerAmount = await this._exchangeWrapper.getCancelledTakerAmountAsync(
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 = {};
}
public async getUnavailableTakerAmountAsync(orderHash: string) {
return this._exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
}
public getZRXTokenAddress(): string {
return this._exchangeWrapper.getZRXTokenAddress();
}
}
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