Quickstart: Backend

npm install @molpha/sdk @anchor-lang/core bn.js

import { web3 } from "@anchor-lang/core";
import {
  MolphaSDK,
  PlanType,
  deriveApiConfigHash,
  deriveFeedIdString,
} from "@molpha/sdk";
import { walletFromKeypairFile } from "@molpha/sdk/utils";

const wallet = walletFromKeypairFile("~/.config/solana/id.json");
const sdk = new MolphaSDK({
  connection: new web3.Connection("https://api.devnet.solana.com", "confirmed"),
  wallet,
});

const plan = await sdk.solana.getPlan(PlanType.Basic);
await sdk.solana.subscribe(PlanType.Basic, {
  maxPriceUsdc: plan.subscriptionPrice,
});

const apiConfig = {
  url: "https://api.example.com/price",
  responseParser: "$.price",
};

const signaturesRequired = 3;
const feedId = deriveFeedIdString(
  wallet.publicKey.toBytes(),
  deriveApiConfigHash(apiConfig),
  signaturesRequired,
);

const result = await sdk.gateway.requestSignedData({
  feedId,
  apiConfig,
  signaturesRequired,
  maxAge: 60,
});

console.log(result.value, result.timestamp, result.signersBitmap);

const { signature } = await sdk.solana.submitDataUpdate(result);
console.log("submitted", signature);

const feed = await sdk.solana.readFeed(feedId);
console.log(feed?.value, feed?.canonicalTimestamp); // value is on-chain bytes

import { buildEvmVerifierArgs, buildStarknetVerifierArgs } from "@molpha/sdk";

const evmArgs = buildEvmVerifierArgs(result);
const starknetArgs = buildStarknetVerifierArgs(result);