meteora-copy/src/lib/solana/connection.ts

import { Connection, Keypair } from '@solana/web3.js'
import bs58 from 'bs58'
import { getEnvOrThrow } from '../utils'

let connectionInstance: Connection | null = null

export function getConnection(): Connection {
	if (!connectionInstance) {
		const endpoint =
			process.env.RPC_ENDPOINT || 'https://api.mainnet-beta.solana.com'
		connectionInstance = new Connection(endpoint, {
			commitment: 'confirmed',
			wsEndpoint:
				process.env.WS_ENDPOINT || 'wss://api.mainnet-beta.solana.com',
		})
	}
	return connectionInstance
}

export function getFollowerKeypair(): Keypair {
	const privateKey = getEnvOrThrow('FOLLOWER_PRIVATE_KEY')
	const secretKey = bs58.decode(privateKey)
	return Keypair.fromSecretKey(secretKey)
}