Source repository with a full React integration example and a Compact contract: https://github.com/MeshJS/midnight-setup

Installation

npm install @meshsdk/midnight-setup

For Midnight Network projects, you'll also need these providers, if you already have them, skip this section:

npm install \
  @midnight-ntwrk/[email protected] \
  @midnight-ntwrk/[email protected] \
  @midnight-ntwrk/[email protected] \
  @midnight-ntwrk/[email protected] \
  @midnight-ntwrk/[email protected] \
  @midnight-ntwrk/[email protected]

Features

• Type-safe SDK - Full TypeScript support
• Provider abstraction - Easy wallet and network integration
• Contract state management - Query contract and ledger states
• Flexible contract support - Works with any Midnight smart contract
• Lightweight - Only 10.4 KB package size
• ESM & CJS - Supports both module systems

Quick Start

1. Setup Providers

import { FetchZkConfigProvider } from "@midnight-ntwrk/midnight-js-fetch-zk-config-provider";
import { httpClientProofProvider } from "@midnight-ntwrk/midnight-js-http-client-proof-provider";
import { indexerPublicDataProvider } from "@midnight-ntwrk/midnight-js-indexer-public-data-provider";
import { levelPrivateStateProvider } from "@midnight-ntwrk/midnight-js-level-private-state-provider";

import type { MidnightSetupContractProviders } from "@meshsdk/midnight-setup";

export async function setupProviders(): Promise<MidnightSetupContractProviders> {
  const wallet = window.midnight?.mnLace;
  if (!wallet) {
    throw new Error("Please install Lace Beta Wallet for Midnight Network");
  }

  const walletAPI = await wallet.enable();
  const walletState = await walletAPI.state();
  const uris = await wallet.serviceUriConfig();

  return {
    privateStateProvider: levelPrivateStateProvider({
      privateStateStoreName: "my-dapp-state",
    }),
    zkConfigProvider: new FetchZkConfigProvider(
      window.location.origin,
      fetch.bind(window),
    ),
    proofProvider: httpClientProofProvider(uris.proverServerUri),
    publicDataProvider: indexerPublicDataProvider(
      uris.indexerUri,
      uris.indexerWsUri,
    ),
    walletProvider: {
      coinPublicKey: walletState.coinPublicKey,
      encryptionPublicKey: walletState.encryptionPublicKey,
      balanceTx: (tx, newCoins) => {
        return walletAPI.balanceAndProveTransaction(tx, newCoins);
      },
    },
    midnightProvider: {
      submitTx: (tx) => {
        return walletAPI.submitTransaction(tx);
      },
    },
  };
}

2. Deploy a Contract

import { MidnightSetupAPI } from "@meshsdk/midnight-setup";

import { setupProviders } from "./providers";

async function deployContract() {
  const providers = await setupProviders();
  const contractInstance = new MyContract({});

  const api = await MidnightSetupAPI.deployContract(
    providers,
    contractInstance,
  );

  console.log("Contract deployed at:", api.deployedContractAddress);
  return api;
}

3. Join Existing Contract

async function joinContract(contractAddress: string) {
  const providers = await setupProviders();
  const contractInstance = new MyContract({});

  const api = await MidnightSetupAPI.joinContract(
    providers,
    contractInstance,
    contractAddress,
  );

  return api;
}

4. Read Contract State

// Get contract state
const contractState = await api.getContractState();
console.log("Contract data:", contractState.data);

// Get ledger state
const ledgerState = await api.getLedgerState();
console.log("Message:", ledgerState.ledgerState?.message);

API Reference

MidnightSetupAPI

Static Methods

deployContract(providers, contractInstance, logger?)

Deploys a new smart contract to Midnight Network.

Parameters:

• providers: MidnightSetupContractProviders - Network and wallet providers
• contractInstance: ContractInstance - Your compiled contract instance
• logger?: Logger - Optional Pino logger

Returns: Promise<MidnightSetupAPI>

joinContract(providers, contractInstance, contractAddress, logger?)

Connects to an existing deployed contract.

Parameters:

• providers: MidnightSetupContractProviders - Network and wallet providers
• contractInstance: ContractInstance - Your compiled contract instance
• contractAddress: string - Address of the deployed contract
• logger?: Logger - Optional Pino logger

Returns: Promise<MidnightSetupAPI>

Instance Methods

getContractState() - Gets the current state of the contract

Returns: Promise<ContractStateData>

getLedgerState() - Gets and parses the ledger state

Returns: Promise<LedgerStateData>

TypeScript Types

import type {
  ContractInstance,
  ContractStateData,
  DeployedContract,
  DeployedMidnightSetupAPI,
  LedgerStateData,
  MidnightSetupContractProviders,
} from "@meshsdk/midnight-setup";

Requirements

• Node.js v18 or higher
• Midnight Lace Wallet browser extension
• TypeScript (recommended)

Links

• Source Repository
• MeshJS Website
• Midnight Network
• Midnight Documentation
• npm Package

Contributing

Contributions are welcome! Please visit the source repository.

License

Apache2.0 © MeshJS Team

See LICENSE for more information.

Support

• Report Issues
• Discord Community
• Twitter