feat: add Mantle support for follows (#502)

Author: Sekhmet

src/helpers/actions.ts

@@ -130,6 +130,7 @@ export async function sxSpaceExists(network: string, spaceId: string): Promise<b
     arb1: 'https://api.studio.thegraph.com/query/23545/sx-arbitrum/version/latest',
     oeth: 'https://api.studio.thegraph.com/query/23545/sx-optimism/version/latest',
     base: 'https://api.studio.thegraph.com/query/23545/sx-base/version/latest',
+    mantle: 'https://mantle-api.snapshot.box',
     sn: 'https://api.snapshot.box',
     'sn-sep': 'https://testnet-api.snapshot.box',
     'linea-testnet':

src/helpers/utils.ts

@@ -8,7 +8,7 @@ import snapshot from '@snapshot-labs/snapshot.js';
 import { Response } from 'express';
 import fetch from 'node-fetch';
 
-const MAINNET_NETWORK_ID_WHITELIST = ['s', 'eth', 'matic', 'arb1', 'oeth', 'sn', 'base'];
+const MAINNET_NETWORK_ID_WHITELIST = ['s', 'eth', 'matic', 'arb1', 'oeth', 'sn', 'base', 'mantle'];
 const TESTNET_NETWORK_ID_WHITELIST = ['s-tn', 'sep', 'linea-testnet', 'sn-sep'];
 const broviderUrl = process.env.BROVIDER_URL ?? 'https://rpc.snapshot.org';