solana-program-examples/tokens/token-2022/nft-meta-data-pointer/anchor-example/app/utils/anchor.ts

import { BN, type IdlAccounts, Program } from '@coral-xyz/anchor';
import { Connection, PublicKey, clusterApiUrl } from '@solana/web3.js';
import { type ExtensionNft, IDL } from '../idl/extension_nft';
import { WrappedConnection } from './wrappedConnection';

export const CONNECTION = new WrappedConnection(process.env.NEXT_PUBLIC_RPC ? process.env.NEXT_PUBLIC_RPC : 'https://rpc.magicblock.app/devnet', {
  wsEndpoint: process.env.NEXT_PUBLIC_WSS_RPC ? process.env.NEXT_PUBLIC_WSS_RPC : 'wss://rpc.magicblock.app/devnet',
  commitment: 'confirmed',
});

export const METAPLEX_READAPI = 'https://devnet.helius-rpc.com/?api-key=78065db3-87fb-431c-8d43-fcd190212125';

// Here you can basically use what ever seed you want. For example one per level or city or whatever.
export const GAME_DATA_SEED = 'level_2';

// ExtensionNft game program ID
const programId = new PublicKey('H31ofLpWqeAzF2Pg54HSPQGYifJad843tTJg8vCYVoh3');

// Create the program interface using the idl, program ID, and provider
export const program = new Program<ExtensionNft>(IDL, programId, {
  connection: CONNECTION,
});

export const [gameDataPDA] = PublicKey.findProgramAddressSync([Buffer.from(GAME_DATA_SEED, 'utf8')], program.programId);

// Player Data Account Type from Idl
export type PlayerData = IdlAccounts<ExtensionNft>['playerData'];
export type GameData = IdlAccounts<ExtensionNft>['gameData'];

// Constants for the game
export const TIME_TO_REFILL_ENERGY: BN = new BN(60);
export const MAX_ENERGY = 100;
export const ENERGY_PER_TICK: BN = new BN(1);
export const TOTAL_WOOD_AVAILABLE: BN = new BN(100000);