What is the correct URL to use for wss connection? I'm getting this error:
websocket.browser.js:47 WebSocket connection to 'wss://api.mainnet-beta.solana.com/' failed
My code used to work fine with these endpoints, but they give the same error now.
endpoints = [
{ url: 'https://raydium.rpcpool.com', weight: 100 },
{ url: 'https://solana-api.tt-prod.net', weight: 100 }
{ url: 'https://solana-api.projectserum.com', weight: 100 } ]```