pyth_sui_dart 1.0.2

A Dart SDK for pyth sui service.

pyth_sui_dart

A lightweight Dart SDK to fetch Pyth price updates and update Pyth price feeds on Sui. It wraps:

• Pyth Price Service (Hermes) for fetching the latest VAAs/accumulator messages.
• Sui client primitives to verify VAAs (via Wormhole) and update/create Pyth price feeds on-chain.

This is a Dart port inspired by the official Pyth cross-chain SDKs.

Features

• Fetch latest price update data for specific Pyth feeds from Hermes.
• Verify Wormhole VAAs inside a Sui transaction.
• Create new Pyth price feeds on Sui.
• Update existing Pyth price feeds with fresh prices.
• Caches package IDs and dynamic field lookups to reduce RPC calls.

Install

Add to your pubspec.yaml:

dependencies:
  pyth_sui_dart: ^1.0.1

Quick Start

1. Create a price service connection and fetch updates

import 'dart:typed_data';
import 'package:pyth_sui_dart/pyth_sui_dart.dart';

Future<List<Uint8List>> fetchUpdates() async {
  final conn = SuiPriceServiceConnection('https://hermes.pyth.network');
  // You can discover available feed IDs too:
  final ids = await conn.getPriceFeedIds();

  // Pick specific feed IDs you care about (hex string IDs)
  final updates = await conn.getPriceFeedsUpdateData([ids.first]);
  return updates; // List<Uint8List> containing VAA or accumulator message bytes
}

2. Prepare a Sui client and the Pyth client

import 'package:sui_dart/sui.dart';
import 'package:pyth_sui_dart/pyth_sui_dart.dart';

final provider = SuiClient(
  SuiClientOptions(
    fullnode: 'https://fullnode.mainnet.sui.io', // or testnet/devnet endpoint
  ),
);

// Replace with the on-chain state object IDs for your network
const pythStateId = '<PYTH_STATE_OBJECT_ID>';
const wormholeStateId = '<WORMHOLE_STATE_OBJECT_ID>';

final pyth = SuiPythClient(
  provider: provider,
  pythStateId: pythStateId,
  wormholeStateId: wormholeStateId,
);

3. Update price feeds on-chain

import 'dart:typed_data';
import 'package:sui_dart/sui.dart';
import 'package:pyth_sui_dart/pyth_sui_dart.dart';

Future<void> updateFeeds(List<String> feedIds, List<Uint8List> updates) async {
  final tx = Transaction();

  // Adds all necessary calls to the transaction:
  // - verify the Wormhole VAA
  // - pay fees
  // - update Pyth price feeds
  final updatedObjectIds = await pyth.updatePriceFeeds(
    tx: tx,
    updates: updates,
    feedIds: feedIds, // hex strings; either with or without 0x prefix
  );

  // Sign + execute per your wallet/integration
  // Example (pseudocode): await provider.signAndExecute(tx, signer: ...);

  print('Updated Pyth price objects: $updatedObjectIds');
}

4. Create a price feed if it does not exist yet

final tx = Transaction();
await pyth.createPriceFeed(tx: tx, updates: updates);
// Sign + execute the transaction after adding the call above.

API Overview

• SuiPriceServiceConnection (extends price_service_client):

  • getPriceFeedsUpdateData(List<String> priceIds) -> Future<List<Uint8List>>
  • Also exposes helpers like getPriceFeedIds() to discover available feeds.

• SuiPythClient:

  • getBaseUpdateFee() -> Future<BigInt>: Reads fee from on-chain Pyth state.
  • updatePriceFeeds({ tx, updates, feedIds }) -> Future<List<String>>: Adds all calls to update multiple feeds.
  • updatePriceFeedsWithCoins({ tx, updates, feedIds, coins }): Same as above when you pre-split coins.
  • createPriceFeed({ tx, updates }): Adds calls to create feeds using accumulator messages.
  • getPriceFeedObjectId(String feedId) -> Future<String?>: Resolves the on-chain object id for a feed.

Network, IDs, and Endpoints

• Hermes endpoint: https://hermes.pyth.network (public). You may use region-specific or authenticated endpoints as needed.
• pythStateId and wormholeStateId are on-chain object IDs and differ per network (mainnet/testnet/devnet). Obtain them from Pyth/Wormhole deployment docs or your Sui explorer.
• Feed IDs are 32-byte hex strings. You can fetch a list via SuiPriceServiceConnection.getPriceFeedIds() or from Pyth documentation.

Development

• Run tests:

dart test

• Key source files:
  • lib/src/client.dart: Pyth Sui transaction helpers
  • lib/src/sui_price_service_connection.dart: Hermes integration
  • lib/pyth_sui_dart.dart: Library exports

License

Apache-2.0. See LICENSE.

Support

• Issues: open a ticket on the GitHub repository.
• For network IDs and deployment details, refer to the official Pyth Network and Wormhole documentation for Sui.