Mainnet deployments

import { PublicKey } from "@solana/web3.js";
import type { Deployment } from "../nest-client";

// Nest developer documentation hosts the versioned deployment manifest.
const NEST_DOCS_ORIGIN = "https://docs.nestusd.com";

export async function loadNestMainnetDeployment(
  origin = NEST_DOCS_ORIGIN,
) {
  const response = await fetch(`${origin}/deployments/mainnet.json`, {
    cache: "no-store",
  });
  if (!response.ok) throw new Error(`Deployment fetch failed: ${response.status}`);
  const deployment = await response.json() as Deployment;
  if (
    deployment.schema !== "nest-public-deployment-v1"
    || deployment.cluster !== "mainnet-beta"
  ) throw new Error("Unexpected Nest deployment manifest");

  // Parsing every address also rejects malformed or truncated manifests early.
  [
    ...Object.values(deployment.programs),
    ...Object.values(deployment.accounts),
    ...Object.values(deployment.mints),
    ...deployment.collateral.flatMap((market) => [
      market.mint,
      market.collateralConfig,
      market.collateralVault,
      market.tokenProgram,
    ]),
  ].forEach((address) => new PublicKey(address));
  return deployment;
}