// Shared by the public read endpoints (stats, supply, explorer): Neon's HTTP SQL endpoint over Node's fetch, the
// same pattern as live.mjs. Returns rows. A file starting with an underscore is not deployed as a function by Vercel.
export function neon(url = process.env.DATABASE_URL) {
  if (!url) throw new Error('DATABASE_URL is not set');
  const host = new URL(url).hostname.replace('-pooler', '');
  return async (query, params = []) => {
    const r = await fetch(`https://${host}/sql`, {
      method: 'POST',
      headers: { 'Neon-Connection-String': url, 'Content-Type': 'application/json' },
      body: JSON.stringify({ query, params }),
    });
    const j = await r.json();
    if (!r.ok) throw new Error(j.message || JSON.stringify(j));
    return j.rows || [];
  };
}
export const num = v => (v === null || v === undefined ? null : Number(v));
export const tablePrefix = () => (process.env.LIVE_TABLE_PREFIX || '').replace(/[^a-z0-9_]/gi, '');
/** EVM chain id from the network name (docs/design/execution-layer.md 8.1: 4461 mainnet, 4462 testnet, 4463 devnet). */
export function chainIdOf(network) {
  const n = String(network || '');
  if (n.includes('devnet')) return 4463;
  if (n.includes('testnet')) return 4462;
  if (n.includes('simnet')) return null;
  return 4461;
}