solana-sniper-bot/cache/snipe-list.cache.ts

import fs from "fs";
import path from "path";
import { logger, SNIPE_LIST_REFRESH_INTERVAL } from "../helpers";

export class SnipeListCache {
	private snipeList: string[] = [];
	private fileLocation = path.join(__dirname, "../snipe-list.txt");

	constructor() {
		setInterval(() => this.loadSnipeList(), SNIPE_LIST_REFRESH_INTERVAL);
	}

	public init() {
		this.loadSnipeList();
	}

	public isInList(mint: string) {
		return this.snipeList.includes(mint);
	}

	private loadSnipeList() {
		logger.trace(`Refreshing snipe list...`);

		const count = this.snipeList.length;
		const data = fs.readFileSync(this.fileLocation, "utf-8");
		this.snipeList = data
			.split("\n")
			.map((a) => a.trim())
			.filter((a) => a);

		if (this.snipeList.length != count) {
			logger.info(`Loaded snipe list: ${this.snipeList.length}`);
		}
	}
}