fetchCoingeckoChainlist.ts

import axios from "axios";
import { csl } from "./func";
import * as fs from "fs";
import { chainItem, coingeckoChain } from "./types";
const fetchChainList = async (): Promise<coingeckoChain[]> => {
  const url = "https://api.coingecko.com/api/v3/asset_platforms";
  const res = await axios.get(url);
  const data = res.data;
  fs.writeFile(`coingeckoChainList.json`, JSON.stringify(data), (e) => {
    if (e) {
      console.error("error: ", e);
    }
    console.log("coingecko chain list saved");
  });
  return data;
};
export const mapCoingeckoChainName = async () => {
  let maps: { [cg: string]: string } = {};
  let chainlist: chainItem[] = [];
  try {
    chainlist = JSON.parse(fs.readFileSync(`chainlist.json`, "utf8"));
  } catch (e) {
    console.log("No chain list was found");
    return undefined;
  }
  let cgchain: coingeckoChain[] = [];
  try {
    console.log("feching new data");
    cgchain = (await fetchChainList())!;
    csl(cgchain);
  } catch (e) {
    cgchain = JSON.parse(fs.readFileSync(`coingeckoChainList.json`, "utf8"));
  }
  for (const c of chainlist) {
    const cg = cgchain.find((i) => {
      if (c.id) {
        if (i.chain_identifier) {
          if (i.chain_identifier === c.id) {
            return true;
          }
        } else {
          if (i.native_coin_id == c.native_token?.coingecko_id) {
            return true;
          }
        }
      } else {
        if (i.native_coin_id == c.native_token?.coingecko_id) {
          return true;
        }
      }
    });
    if (cg) {
      maps[cg.id] = c.chain ?? "";
    }
  }
  fs.writeFile(`chainmap.json`, JSON.stringify(maps), (e) => {
    if (e) {
      console.error("error: ", e);
    }
    console.log("coingecko chain map saved");
  });
  return maps;
};
// (async () => {
//   await mapCoingeckoChainName();
// })();