Using createHiveChain

The createHiveChain() function creates a WAX instance with full blockchain connectivity. You can query accounts, fetch blocks, broadcast transactions, and access all Hive APIs.

When to use createHiveChain

Use createHiveChain() when you need:

API access - Query blockchain data (accounts, blocks, witnesses, etc.)
Transaction broadcasting - Send signed transactions to the network
Automatic TaPoS - Create transactions with automatic reference block handling
Online validation - Verify transactions against current chain state
REST API calls - Access high-performance REST endpoints

For offline operations, use createWaxFoundation() instead.

Creating a chain instance

Basic initialization:

import { createHiveChain } from "@hiveio/wax";

const chain = await createHiveChain();

With custom configuration:

import { createHiveChain } from "@hiveio/wax";

const chain = await createHiveChain({
  chainId: "beeab0de00000000000000000000000000000000000000000000000000000000",
  apiEndpoint: "https://api.hive.blog",
  restApiEndpoint: "https://api.syncad.com",
  apiTimeout: 5000, // 5 seconds
  waxApiCaller: "my-app/1.0.0"
});

Interface reference

The IHiveChainInterface extends IWaxBaseInterface with:

interface IHiveChainInterface extends IWaxBaseInterface {
  // API properties
  readonly api: TDefaultJsonRpcApi;
  readonly restApi: TDefaultRestApi;
  readonly endpointUrl: string;

  // Transaction methods
  createTransaction(expirationTime?: string | Date | number): Promise<IOnlineTransaction>;
  broadcast(transaction: ApiTransaction | ITransaction | IOnlineTransaction): Promise<void>;

  // Configuration methods
  extend<YourApi>(extendedHiveApiData?: YourApi): HiveChainApi & TWaxExtended<YourApi, this>;
  extendRest<YourRestApi>(extendedHiveRestApiData?: TDeepWaxApiRequestPartial<YourRestApi>): HiveChainApi & TWaxRestExtended<YourRestApi, this>;
  extendConfig(config: IWaxChainExtendibleOptions): this;
  withProxy(requestInterceptor: TRequestInterceptor, responseInterceptor: TResponseInterceptor): HiveChainApi;

  // Manabar methods
  calculateAccountMana(account: ApiAccount, now: number, manabarType: EManabarType): IManabarData;
}

Creating transactions

Create transactions with automatic TaPoS:

import { createHiveChain } from "@hiveio/wax";

const chain = await createHiveChain();

// Creates transaction with current head block as reference
const tx = await chain.createTransaction();

tx.pushOperation({
  vote: {
    voter: "alice",
    author: "bob",
    permlink: "test-post",
    weight: 10000
  }
});

With custom expiration:

const tx = await chain.createTransaction("+30m"); // 30 minutes from now
const tx = await chain.createTransaction("+2h");  // 2 hours from now
const tx = await chain.createTransaction(new Date("2024-12-31T23:59:59Z"));

Broadcasting transactions

Send a signed transaction to the network:

import { createHiveChain } from "@hiveio/wax";

const chain = await createHiveChain();
const tx = await chain.createTransaction();

tx.pushOperation({
  vote: {
    voter: "alice",
    author: "bob",
    permlink: "test-post",
    weight: 10000
  }
});

// Sign the transaction (using a signer package)
// ... signing code ...

// Broadcast to the network
await chain.broadcast(tx);

console.log("Transaction broadcasted!");

Broadcast with automatic validation:

// The chain performs on-chain verification before broadcasting
await chain.broadcast(tx);

// This checks:
// - Private key leakage prevention
// - Authority definition validation
// - Current chain state compatibility

API access

The api property provides access to all Hive JSON-RPC APIs:

database_api

Query blockchain data:

// Get account information
const accounts = await chain.api.database_api.find_accounts({
  accounts: ["alice", "bob"]
});

console.log(accounts.accounts[0].name);
console.log(accounts.accounts[0].balance);

// Get dynamic global properties
const props = await chain.api.database_api.get_dynamic_global_properties({});

console.log(`Head block: ${props.head_block_number}`);
console.log(`Time: ${props.time}`);

// Verify authority
const result = await chain.api.database_api.verify_authority({
  trx: tx.toApiJson()
});

console.log(`Valid: ${result.valid}`);

block_api

Fetch block data:

// Get a single block
const block = await chain.api.block_api.get_block({
  block_num: 87654321
});

console.log(`Block ID: ${block.block.block_id}`);
console.log(`Transactions: ${block.block.transactions.length}`);

// Get block range
const blocks = await chain.api.block_api.get_block_range({
  starting_block_num: 87654320,
  count: 10
});

for (const block of blocks.blocks) {
  console.log(`Block ${block.block_id}`);
}

// Get block header
const header = await chain.api.block_api.get_block_header({
  block_num: 87654321
});

console.log(header.header);

network_broadcast_api

Broadcast transactions:

// Broadcast a signed transaction
await chain.api.network_broadcast_api.broadcast_transaction({
  trx: tx.toApiJson(),
  max_block_age: -1
});

rc_api

Query resource credits:

// Get RC accounts
const rcAccounts = await chain.api.rc_api.find_rc_accounts({
  accounts: ["alice"]
});

const rc = rcAccounts.rc_accounts[0];
console.log(`Max RC: ${rc.max_rc}`);
console.log(`Current RC: ${rc.rc_manabar.current_mana}`);

account_by_key_api

Find accounts by public key:

const result = await chain.api.account_by_key_api.get_key_references({
  keys: ["STM8ZSw..."]
});

console.log(`Accounts: ${result.accounts}`);

REST API access

The restApi property provides high-performance REST endpoints:

// Example REST API usage
const data = await chain.restApi.some_endpoint({
  // Request parameters
});

Configure endpoint URLs:

// Change default REST API URL
chain.restApi.endpointUrl = "https://my-api.example.com";

// Change URL for specific endpoint
chain.restApi.specific_endpoint.endpointUrl = "https://specialized-api.example.com";

// Reset to default
chain.restApi.specific_endpoint.endpointUrl = undefined;

Extending APIs

Extend JSON-RPC API

Add custom API methods:

import { createHiveChain } from "@hiveio/wax";

const customApiSchema = {
  my_custom_api: {
    my_method: {
      params: { account: String },
      result: { data: String }
    }
  }
};

const chain = await createHiveChain();
const extendedChain = chain.extend(customApiSchema);

// Use custom method
const result = await extendedChain.api.my_custom_api.my_method({
  account: "alice"
});

console.log(result.data);

Extend REST API

Add custom REST endpoints:

const customRestSchema = {
  custom_rest: {
    get_data: {
      params: { id: Number },
      result: { value: String },
      method: "GET",
      urlPath: "/custom/{id}"
    }
  }
};

const extendedChain = chain.extendRest(customRestSchema);

const result = await extendedChain.restApi.custom_rest.get_data({
  id: 123
});

console.log(result.value);

Request/response interception

Intercept API calls for logging or modification:

import { createHiveChain } from "@hiveio/wax";

const chain = await createHiveChain();

const chainWithProxy = chain.withProxy(
  // Request interceptor
  (requestData) => {
    console.log("Request:", requestData.url, requestData.data);
    return requestData;
  },
  // Response interceptor
  (responseData, requestData) => {
    console.log("Response:", responseData.response);
    return responseData;
  }
);

// All API calls through chainWithProxy will be intercepted
const accounts = await chainWithProxy.api.database_api.find_accounts({
  accounts: ["alice"]
});

Manabar calculations

Calculate manabar values with live chain data:

import { createHiveChain, EManabarType } from "@hiveio/wax";

const chain = await createHiveChain();

// Get account data
const accountData = await chain.api.database_api.find_accounts({
  accounts: ["alice"]
});

const account = accountData.accounts[0];

// Get current head block time
const props = await chain.api.database_api.get_dynamic_global_properties({});
const now = new Date(props.time).getTime() / 1000;

// Calculate upvote manabar
const upvoteManabar = chain.calculateAccountMana(account, now, EManabarType.UPVOTE);
console.log(`Upvote mana: ${upvoteManabar.percent}%`);

// Calculate downvote manabar
const downvoteManabar = chain.calculateAccountMana(account, now, EManabarType.DOWNVOTE);
console.log(`Downvote mana: ${downvoteManabar.percent}%`);

// Calculate RC manabar (requires rc_api call)
const rcData = await chain.api.rc_api.find_rc_accounts({
  accounts: ["alice"]
});

if (rcData.rc_accounts.length > 0) {
  const rcAccount = rcData.rc_accounts[0];
  const rcManabar = chain.calculateCurrentManabarValue(
    now,
    rcAccount.max_rc,
    rcAccount.rc_manabar.current_mana,
    rcAccount.rc_manabar.last_update_time
  );
  console.log(`RC mana: ${rcManabar.percent}%`);
}

Configuration management

Change endpoint URL

Update the API endpoint at runtime:

const chain = await createHiveChain({
  apiEndpoint: "https://api.hive.blog"
});

// Change endpoint
chain.endpointUrl = "https://api.deathwing.me";

// All subsequent API calls use the new endpoint
const props = await chain.api.database_api.get_dynamic_global_properties({});

Extend configuration

Create a new instance with modified settings:

const mainnetChain = await createHiveChain({
  chainId: "beeab0de00000000000000000000000000000000000000000000000000000000",
  apiEndpoint: "https://api.hive.blog"
});

// Create testnet instance
const testnetChain = mainnetChain.extendConfig({
  chainId: "42000000000000000000000000000000000000000000000000000000000000",
  apiEndpoint: "https://testnet.openhive.network"
});

console.log(mainnetChain.chainId); // Mainnet
console.log(testnetChain.chainId); // Testnet

Error handling

Handle API errors gracefully:

import { createHiveChain, WaxChainApiError } from "@hiveio/wax";

const chain = await createHiveChain();

try {
  const accounts = await chain.api.database_api.find_accounts({
    accounts: ["nonexistent-account"]
  });
} catch (error) {
  if (error instanceof WaxChainApiError) {
    console.error("API Error:", error.message);
    console.error("Request:", error.requestData);
    console.error("Response:", error.responseData);
  } else {
    console.error("Unknown error:", error);
  }
}

Complete example

A full workflow using createHiveChain():

import { createHiveChain } from "@hiveio/wax";

// Initialize chain
const chain = await createHiveChain();

console.log(`Connected to: ${chain.endpointUrl}`);
console.log(`Chain ID: ${chain.chainId}`);

// Query account
const accountData = await chain.api.database_api.find_accounts({
  accounts: ["alice"]
});

const account = accountData.accounts[0];
console.log(`Account: ${account.name}`);
console.log(`Balance: ${account.balance}`);

// Get dynamic global properties
const props = await chain.api.database_api.get_dynamic_global_properties({});
console.log(`Head block: ${props.head_block_number}`);

// Create transaction
const tx = await chain.createTransaction("+1h");

tx.pushOperation({
  transfer: {
    from_account: "alice",
    to_account: "bob",
    amount: chain.hiveCoins(1),
    memo: "Test transfer"
  }
});

console.log(`Transaction ID: ${tx.id}`);
console.log(`Signature digest: ${tx.sigDigest}`);

// Validate transaction
tx.validate();
console.log("Transaction is valid");

// Sign transaction (using a signer package)
// ... signing code ...

// Broadcast to network
await chain.broadcast(tx);
console.log("Transaction broadcasted successfully!");

Next steps

Explore more capabilities:

Build complex transactions
Learn about API calls in detail
Integrate with frameworks
Study working examples

Get Started

Core Concepts

Python SDK

TypeScript SDK

Guides

Extensions

Using createHiveChain

When to use createHiveChain

Creating a chain instance

Interface reference

Creating transactions

Broadcasting transactions

API access

database_api

block_api

network_broadcast_api

rc_api

account_by_key_api

REST API access

Extending APIs

Extend JSON-RPC API

Extend REST API

Request/response interception

Manabar calculations

Configuration management

Change endpoint URL

Extend configuration

Error handling

Complete example

Next steps

Build docs developers (and LLMs) love

Get Started

Core Concepts

Python SDK

TypeScript SDK

Guides

Extensions

Documentation Index

​When to use createHiveChain

​Creating a chain instance

​Interface reference

​Creating transactions

​Broadcasting transactions

​API access

​database_api

​block_api

​network_broadcast_api

​rc_api

​account_by_key_api

​REST API access

​Extending APIs

​Extend JSON-RPC API

​Extend REST API

​Request/response interception

​Manabar calculations

​Configuration management

​Change endpoint URL

​Extend configuration

​Error handling

​Complete example

​Next steps

Build docs developers (and LLMs) love

When to use createHiveChain

Creating a chain instance

Interface reference

Creating transactions

Broadcasting transactions

API access

database_api

block_api

network_broadcast_api

rc_api

account_by_key_api

REST API access

Extending APIs

Extend JSON-RPC API

Extend REST API

Request/response interception

Manabar calculations

Configuration management

Change endpoint URL

Extend configuration

Error handling

Complete example

Next steps