40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
import { Injectable } from '@nestjs/common';
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import { ConfigService } from '@nestjs/config';
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import { BigNumber } from 'ethers';
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import { GasPriceOracle } from 'gas-price-oracle';
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import { ChainId } from '@/types';
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import { RPC_LIST, numbers } from '@/constants';
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import { toWei } from '@/utilities';
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@Injectable()
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export class GasPriceService {
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private readonly chainId: number;
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constructor(private configService: ConfigService) {
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this.chainId = this.configService.get<number>('base.chainId');
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}
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async getGasPrice() {
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const TIMER = 3;
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const INTERVAL = TIMER * numbers.SECOND;
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const instance = new GasPriceOracle({
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timeout: INTERVAL,
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defaultRpc: RPC_LIST[ChainId.XDAI],
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});
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const fast = await instance.fetchGasPriceFromRpc();
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const bnGas = BigNumber.from(toWei(String(fast), 'gwei'));
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return {
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instant: bnGas.mul(150).div(100).toHexString(),
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fast: bnGas.mul(130).div(100).toHexString(),
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standard: bnGas.mul(85).div(100).toHexString(),
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low: bnGas.mul(50).div(100).toHexString(),
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};
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}
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}
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