iotex-node-sdk

v0.2.3

Published

2 months ago

Comprehensive npm package for querying the IoTeX blockchain via native gRPC protocol with account management, HD wallet support, and full TypeScript types.

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iotex blockchain grpc cryptocurrency web3

IoTeX Node.js SDK

A comprehensive npm package for querying the IoTeX blockchain using the native gRPC protocol. This SDK provides a TypeScript-first interface for blockchain queries, account management, and delegate information.

Features

Native gRPC Support: Direct connection to IoTeX nodes via gRPC (api.iotex.one:443)
Blockchain Queries: Access chain metadata, blocks, epochs, and transaction receipts
Node Delegate Queries: Query blockchain delegates, epochs, and consensus information
Voting Bucket Queries: Query staking buckets with custom protobuf encoding/decoding
Account Queries: Get balances, metadata, nonce, and action history
Account Management: Create, import, export accounts with keystore encryption
HD Wallet Support: Hierarchical Deterministic wallets with BIP44 derivation (m/44'/304'/...)
Address Conversion: Seamless conversion between IoTeX and Ethereum address formats
TypeScript Native: Full TypeScript support with comprehensive type definitions
Modern Stack: Built with ethers v6, @grpc/grpc-js, and official IoTeX libraries

Installation

npm install iotex-node-sdk

Quick Start

import { IoTeXSDK } from 'iotex-node-sdk';

// Create SDK instance for mainnet
const sdk = IoTeXSDK.mainnet();

// Connect to blockchain
await sdk.connect();

// Get chain metadata
const chainMeta = await sdk.blockchain.getChainMeta();
console.log(`Height: ${chainMeta.height}, Epoch: ${chainMeta.epoch.num}`);

// Get account balance
const balance = await sdk.account.getBalance('io1gh7xfrsnj6p5uqgjpk9xq6jg9na28aewgp7a9v');
console.log(`Balance: ${balance} IOTX`);

// Get current delegates
const delegates = await sdk.node.getDelegates();
console.log(`Total delegates: ${delegates.length}`);

// Get voting buckets
const buckets = await sdk.blockchain.getBucketList({
  voterAddress: 'io1jzdxuv7etyfvs7th7jwyspswr6y660zjd7lykg'
});
console.log(`Total buckets: ${buckets.length}`);

// Disconnect
sdk.disconnect();

Network Configuration

Mainnet

const sdk = IoTeXSDK.mainnet();
// or
const sdk = new IoTeXSDK({ endpoint: 'api.iotex.one:443', secure: true });

Testnet

const sdk = IoTeXSDK.testnet();
// or
const sdk = new IoTeXSDK({ endpoint: 'api.testnet.iotex.one:443', secure: true });

Local Node

const sdk = IoTeXSDK.localhost();
// or
const sdk = new IoTeXSDK({ endpoint: 'localhost:14014', secure: false });

Account Management

Create New Account

// Create account with password-protected keystore
const account = await sdk.account.create('password123');
console.log('Address:', account.address);
console.log('Private key:', account.privateKey);

Import Account from Private Key

const address = await sdk.account.importKey(
  'your-private-key-hex',
  'password123'
);

Export Private Key

const privateKey = await sdk.account.exportKey(
  'io1gh7xfrsnj6p5uqgjpk9xq6jg9na28aewgp7a9v',
  'password123'
);

List Accounts

const accounts = sdk.account.list();
for (const account of accounts) {
  console.log(account.address);
}

Sign and Verify Messages

// Sign message
const signature = await sdk.account.sign(
  'io1gh7xfrsnj6p5uqgjpk9xq6jg9na28aewgp7a9v',
  'password123',
  'Hello, IoTeX!'
);

// Verify signature
const isValid = sdk.account.verify(
  'Hello, IoTeX!',
  signature,
  'io1gh7xfrsnj6p5uqgjpk9xq6jg9na28aewgp7a9v'
);

HD Wallet (Hierarchical Deterministic Wallet)

Create HD Wallet

// Create HD wallet with mnemonic
const mnemonic = await sdk.account.createHDWallet('password123', 'english');
console.log('Mnemonic:', mnemonic);
// Save this mnemonic securely!

Import HD Wallet

await sdk.account.importHDWallet(
  'your twelve word mnemonic phrase here',
  'password123'
);

Derive Accounts

// Derive account at path m/44'/304'/0'/0/0
const account1 = await sdk.account.deriveHDAccount('password123', 0, 0, 0);
console.log('Address:', account1.address);
console.log('Path:', account1.path);

// Derive account at path m/44'/304'/0'/0/1
const account2 = await sdk.account.deriveHDAccount('password123', 0, 0, 1);

// Derive account at path m/44'/304'/1'/0/0
const account3 = await sdk.account.deriveHDAccount('password123', 1, 0, 0);

Address Conversion

import { toEthAddress, toIoAddress } from 'iotex-node-sdk';

// Convert IoTeX to Ethereum format
const ethAddr = toEthAddress('io1hp6y4eqr90j7tmul4w2wa8pm7wx462hq0mg4tw');
// Returns: 0xb8744ae4032be5e5ef9fab94ee9c3bf38d5d2ae0

// Convert Ethereum to IoTeX format
const ioAddr = toIoAddress('0xb8744ae4032be5e5ef9fab94ee9c3bf38d5d2ae0');
// Returns: io1hp6y4eqr90j7tmul4w2wa8pm7wx462hq0mg4tw

Blockchain Queries

Get Chain Metadata

const chainMeta = await sdk.blockchain.getChainMeta();
console.log('Height:', chainMeta.height.toString());
console.log('Epoch:', chainMeta.epoch.num.toString());
console.log('TPS:', chainMeta.tps);

Get Block Information

// Get block by height
const block = await sdk.blockchain.getBlock(1000000);

// Get block by hash
const blockByHash = await sdk.blockchain.getBlock('block-hash-here');

console.log('Block hash:', block.blockHash);
console.log('Timestamp:', block.timestamp);
console.log('Producer:', block.producerAddress);

Get Epoch Metadata

// Get current epoch
const currentEpoch = await sdk.blockchain.getEpochMeta();

// Get specific epoch
const epoch1000 = await sdk.blockchain.getEpochMeta(1000);

console.log('Epoch:', currentEpoch.num.toString());
console.log('Height:', currentEpoch.height.toString());

Get Voting Buckets

// Get buckets by voter address
const buckets = await sdk.blockchain.getBucketList({
  voterAddress: 'io1jzdxuv7etyfvs7th7jwyspswr6y660zjd7lykg',
  offset: 0,
  limit: 100
});

// Get buckets by candidate name
const candidateBuckets = await sdk.blockchain.getBucketList({
  candidateName: 'iotexlab'
});

// Get all buckets (paginated)
const allBuckets = await sdk.blockchain.getBucketList({
  offset: 0,
  limit: 100
});

// Get specific bucket by index
const bucket = await sdk.blockchain.getBucket(32);

console.log('Bucket info:', {
  index: bucket.index,
  candidateAddress: bucket.candidateAddress,
  stakedAmount: bucket.stakedAmount,
  stakedDuration: bucket.stakedDuration,
  autoStake: bucket.autoStake,
  owner: bucket.owner
});

Get Blockchain Version

const version = await sdk.blockchain.getVersion();
console.log('Version:', version.packageVersion);
console.log('Commit:', version.packageCommitID);

Node Delegate Queries

Get Current Delegates

// Get top 36 delegates with full candidate information
const delegates = await sdk.node.getDelegates();

for (const delegate of delegates) {
  console.log(`${delegate.rank}. ${delegate.name}`);
  console.log(`   Operator Address: ${delegate.operatorAddress || delegate.address}`);
  console.log(`   Owner Address: ${delegate.ownerAddress}`);
  console.log(`   Reward Address: ${delegate.rewardAddress}`);
  console.log(`   Votes: ${delegate.votes} IOTX`);
  console.log(`   Total Weighted Votes: ${delegate.totalWeightedVotes}`);
  console.log(`   Self-staking Tokens: ${delegate.selfStakingTokens}`);
  console.log(`   Production: ${delegate.production}`);
  console.log(`   Active: ${delegate.active}`);
}

Get All Delegates

// Get all delegates for current epoch (includes all registered candidates)
const allDelegates = await sdk.node.getDelegates({ all: true });

// Get delegates for specific epoch
const epoch1000Delegates = await sdk.node.getDelegates({
  epochNumber: 1000,
  all: true
});

// Access extended delegate fields
console.log('Owner:', allDelegates[0].ownerAddress);
console.log('Operator:', allDelegates[0].operatorAddress);
console.log('Reward:', allDelegates[0].rewardAddress);
console.log('Self-stake bucket index:', allDelegates[0].selfStakeBucketIdx);
console.log('ID:', allDelegates[0].id);

Get Current Epoch

const currentEpoch = await sdk.node.getCurrentEpoch();
console.log('Epoch:', currentEpoch.num.toString());
console.log('Height:', currentEpoch.height.toString());

Account Information

Get Account Balance

const balance = await sdk.account.getBalance('io1jzdxuv7etyfvs7th7jwyspswr6y660zjd7lykg');
console.log(`Balance: ${balance} IOTX`);

// Also works with Ethereum addresses
const balance2 = await sdk.account.getBalance('0x909a6e33d95912c87977f49c48060e1e89ad3c52');

Get Account Metadata

const meta = await sdk.account.getMeta('io1jzdxuv7etyfvs7th7jwyspswr6y660zjd7lykg');
console.log('Address:', meta.address);
console.log('Balance:', meta.balance);
console.log('Nonce:', meta.nonce.toString());
console.log('Pending Nonce:', meta.pendingNonce.toString());
console.log('Number of Actions:', meta.numActions.toString());

Get Account Nonce

const nonce = await sdk.account.getNonce('io1jzdxuv7etyfvs7th7jwyspswr6y660zjd7lykg');
console.log('Current nonce:', nonce.toString());

Utility Functions

Amount Conversion

import { iotxToRau, rauToIotx } from 'iotex-node-sdk';

// Convert IOTX to Rau (smallest unit)
const rau = iotxToRau('100');        // Returns: 100000000000000000000n
const iotx = rauToIotx(rau);         // Returns: "100"

Validation

import {
  isValidIoAddress,
  isValidEthAddress,
  isValidAmount,
  isValidCandidateName
} from 'iotex-node-sdk';

isValidIoAddress('io1hp6y4eqr90j7tmul4w2wa8pm7wx462hq0mg4tw');  // true
isValidEthAddress('0xb8744ae4032be5e5ef9fab94ee9c3bf38d5d2ae0'); // true
isValidAmount('100.5');                                          // true
isValidCandidateName('iotexlab');                                // true

Error Handling

import { IoTeXError } from 'iotex-node-sdk';

try {
  const balance = await sdk.account.getBalance('invalid-address');
} catch (error) {
  if (error instanceof IoTeXError) {
    console.error('Error code:', error.code);
    console.error('Message:', error.message);
    console.error('Details:', error.details);
  }
}

Examples

See the examples/ directory for complete working examples:

get-balance.ts - Query account balances
get-delegates.ts - Query blockchain delegates
create-account.ts - Create and manage accounts
hdwallet.ts - HD wallet operations
blockchain-info.ts - Query blockchain information

Run an example:

npx ts-node examples/get-balance.ts

Testing

# Run all tests
npm test

# Run tests in watch mode
npm run test:watch

# Run tests with coverage
npm test -- --coverage

Building

npm run build

Architecture

iotex-node-sdk/
├── src/
│   ├── client/          # gRPC client and configuration
│   ├── account/         # Account management, keystore, HD wallet, crypto
│   ├── node/            # Node delegate queries
│   ├── stake/           # Staking operations (stake2)
│   ├── blockchain/      # Blockchain queries
│   ├── utils/           # Utilities (conversion, validation, errors)
│   └── index.ts         # Main SDK export
├── proto/               # Protobuf definitions from iotex-proto
├── examples/            # Usage examples
└── test/                # Unit tests

Dependencies

Core Dependencies

@grpc/grpc-js ^1.12.0 - Modern gRPC for Node.js
@grpc/proto-loader ^0.7.13 - Dynamic protobuf loading
@iotexproject/iotex-address-ts ^1.0.2 - Official address conversion
ethers ^6.13.0 - Ethereum-compatible cryptography
bip39 ^3.1.0 - Mnemonic generation/validation
hdkey ^2.1.0 - HD wallet key derivation

Comparison with ioctl

This SDK replicates the core functionality of the ioctl CLI tool:

| ioctl Command | SDK Method | |---------------|------------| | ioctl account balance | sdk.account.getBalance() | | ioctl account create | sdk.account.create() | | ioctl account import | sdk.account.importKey() | | ioctl hdwallet create | sdk.account.createHDWallet() | | ioctl hdwallet derive | sdk.account.deriveHDAccount() | | ioctl node delegate | sdk.node.getDelegates() | | ioctl bc info | sdk.blockchain.getChainMeta() | | ioctl bc block | sdk.blockchain.getBlock() |

📚 Documentation

Complete documentation is available in the docs/ folder:

DOCUMENTATION_INDEX.md - Start here! Master index to all documentation
GETTING_STARTED.md - Installation and first steps
README_QUERIES.md - Query examples and patterns
ACCOUNT_MANAGEMENT.md - Account creation, keystore, HD wallet
API_COMPLETE_REFERENCE.md - Exhaustive API documentation
ADVANCED_QUERIES.md - Advanced query patterns and error handling
FEATURES_STATUS.md - Feature implementation status

All features are fully documented with examples and best practices.

Development Status

Fully Implemented ✅

gRPC client with TLS support
Account management (create, import, export, sign)
Account queries (balance, metadata, nonce)
Keystore encryption/decryption
HD wallet with BIP44 derivation
Cryptographic operations (signing, verification, hashing)
Address conversion (IoTeX ↔ Ethereum)
Blockchain queries (chain meta, blocks, epochs)
Voting bucket queries (custom protobuf encoding/decoding)
Node delegate queries
Utility functions (conversion, validation, errors)
Comprehensive test suite (52 tests passing)

Not Yet Implemented ❌

Write operations (staking, transfers, contract calls)
Smart contract interaction
Action submission (requires protobuf serialization)
Event streaming
WebSocket support

Roadmap

Phase 1: Complete protobuf action building for staking operations
Phase 2: Implement smart contract ABI encoding/decoding
Phase 3: Add WebSocket support for real-time events
Phase 4: Browser compatibility (using grpc-web)

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT

Support

For issues and questions:

GitHub Issues: Create an issue
IoTeX Discord: Join the community