Getting Block using eosjs in Nodejs

Oct 13, 2025 by wbrum.org 14 views

Introduction

Eosjs is a popular JavaScript library used to interact with the EOS blockchain. It provides a simple and intuitive way to send transactions, get block information, and more. However, when trying to get a block using the eosjs library in Nodejs, you may encounter an error. In this article, we will explore how to get a block using eosjs in Nodejs and provide a solution to the common error 'Invalid Block number or ID, must be greater than 0 and less than 64 characters'.

Understanding the Error

The error 'Invalid Block number or ID, must be greater than 0 and less than 64 characters' occurs when the block number or ID is not within the valid range. The block number or ID must be a positive integer greater than 0 and less than 64 characters. This error can be frustrating, especially when you are trying to get a specific block.

Getting Block using eosjs in Nodejs

To get a block using eosjs in Nodejs, you can use the getBlock method. This method takes a block number or ID as an argument and returns the block information. Here is an example of how to get a block using eosjs in Nodejs:

const { JsSignatureProvider, SignatureProvider, AbstractApi, JsonRpcApi, JsonRpcError } = require('eosjs');
const { TextEncoder, TextDecoder } = require('text-encoding');
const { Api, JsonRpc } = require('eosjs');
const { JsSignatureProvider as SignatureProvider } = require('eosjs/dist/eosjs-jssig');
const privateK = 'your_private_key';
const chainId = 'your_chain_id';
const rpcEndpoint = 'your_rpc_endpoint';
const signatureProvider = new JsSignatureProvider([privateK]);
const api = new JsonRpc(rpcEndpoint, 
signatureProvider signatureProvider,
textEncoder: new TextEncoder(),
textDecoder: new TextDecoder(),
);
const blockNumber = 123456; // Replace with the block number you want to get
api.getBlock(blockNumber).then((block) => {
console.log(block);
}).catch((error) => {
console.error(error);
});

Solution to the Error

The error 'Invalid Block number or ID, must be greater than 0 and less than 64 characters' can be solved by ensuring that the block number or ID is within the valid range. Here are a few things you can try:

Check the block number or ID: Make sure that the block number or ID is a positive integer greater than 0 and less than 64 characters.
Use the correct block number or ID: Ensure that you are using the correct block number or ID. You can use the getBlockCount method to get the current block count and then use that value to get the block information.
Use the getBlock method with the block ID: Instead of using the block number, you can use the block ID to get the block information. The block ID is a unique identifier for each block and can be used to get the block information.

Example of Getting Block using Block ID

Here is an example of how to get a block using the block ID:

const blockId = 'your_block_id';
api.getBlock(blockId).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Conclusion

Getting a block using eosjs in Nodejs can be a simple process, but it requires attention to detail. By understanding the error 'Invalid Block number or ID, must be greater than 0 and less than 64 characters' and following the solution provided, you can successfully get a block using eosjs in Nodejs.

Common Issues and Solutions

Here are some common issues and solutions you may encounter when getting a block using eosjs in Nodejs:

Error: 'Invalid Block number or ID, must be greater than 0 and less than 64 characters': This error occurs when the block number or ID is not within the valid range. Ensure that the block number or ID is a positive integer greater than 0 and less than 64 characters.
Error: 'Block not found': This error occurs when the block is not found. Ensure that the block number or ID is correct and that the block exists.
Error: 'Network error': This error occurs when there is a network error. Ensure that the RPC endpoint is correct and that the network is stable.

Troubleshooting Tips

Here are some troubleshooting tips you can use when getting a block using eosjs in Nodejs:

Check the RPC endpoint: Ensure that the RPC endpoint is correct and that the network is stable.
Check the block number or ID: Ensure that the block number or ID is a positive integer greater than 0 and less than 64 characters.
Check the block existence: Ensure that the block exists and that the block number or ID is correct.
Check the network: Ensure that the network is stable and that there are no network errors.

Best Practices

Here are some best practices you can follow when getting a block using eosjs in Nodejs:

Use the correct block number or ID: Ensure that you are using the correct block number or ID.
Use the getBlock method with the block ID: Instead of using the block number, use the block ID to get the block information.
Check the block existence: Ensure that the block exists and that the block number or ID is correct.
Check the network: Ensure that the network is stable and that there are no network errors.
Eosjs Nodejs Block Getting Q&A =====================================

Q: What is the eosjs library and how is it used in Nodejs?

A: The eosjs library is a popular JavaScript library used to interact with the EOS blockchain. It provides a simple and intuitive way to send transactions, get block information, and more. In Nodejs, eosjs is used to create a connection to the EOS blockchain and perform various operations such as getting block information, sending transactions, and more.

Q: How do I get a block using eosjs in Nodejs?

A: To get a block using eosjs in Nodejs, you can use the getBlock method. This method takes a block number or ID as an argument and returns the block information. Here is an example of how to get a block using eosjs in Nodejs:

const { JsSignatureProvider, SignatureProvider, AbstractApi, JsonRpcApi, JsonRpcError } = require('eosjs');
const { TextEncoder, TextDecoder } = require('text-encoding');
const { Api, JsonRpc } = require('eosjs');
const { JsSignatureProvider as SignatureProvider } = require('eosjs/dist/eosjs-jssig');
const privateK = 'your_private_key';
const chainId = 'your_chain_id';
const rpcEndpoint = 'your_rpc_endpoint';
const signatureProvider = new JsSignatureProvider([privateK]);
const api = new JsonRpc(rpcEndpoint, 
signatureProvider signatureProvider,
textEncoder: new TextEncoder(),
textDecoder: new TextDecoder(),
);
const blockNumber = 123456; // Replace with the block number you want to get
api.getBlock(blockNumber).then((block) => {
console.log(block);
}).catch((error) => {
console.error(error);
});

Q: What is the difference between a block number and a block ID?

A: A block number is a unique identifier for each block in the EOS blockchain. It is a positive integer that represents the position of the block in the blockchain. A block ID, on the other hand, is a unique identifier for each block in the EOS blockchain. It is a string that represents the hash of the block.

Q: How do I get the block ID of a block?

A: To get the block ID of a block, you can use the getBlock method and then get the id property of the block object. Here is an example of how to get the block ID of a block:

const blockNumber = 123456; // Replace with the block number you want to get
api.getBlock(blockNumber).then((block) => {
  const blockId = block.id;
  console.log(blockId);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockCount` method and how is it used?

A: The getBlockCount method is used to get the current block count of the EOS blockchain. It returns the number of blocks in the blockchain. Here is an example of how to use the getBlockCount method:

api.getBlockCount().then((blockCount) => {
  console.log(blockCount);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block?

A: To get the block information of a specific block, you can use the getBlock method and pass the block number or ID as an argument. Here is an example of how to get the block information of a specific block:

const blockNumber = 123456; // Replace with the block number you want to get
api.getBlock(blockNumber).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockByNumber` method and how is it used?

A: The getBlockByNumber method is used to get the block information of a specific block by its number. It takes a block number as an argument and returns the block information. Here is an example of how to use the getBlockByNumber method:

const blockNumber = 123456; // Replace with the block number you want to get
api.getBlockByNumber(blockNumber).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block by its ID?

A: To get the block information of a specific block by its ID, you can use the getBlockById method and pass the block ID as an argument. Here is an example of how to get the block information of a specific block by its ID:

const blockId = 'your_block_id'; // Replace with the block ID you want to get
api.getBlockById(blockId).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockByHash` method and how is it used?

A: The getBlockByHash method is used to get the block information of a specific block by its hash. It takes a block hash as an argument and returns the block information. Here is an example of how to use the getBlockByHash method:

const blockHash = 'your_block_hash'; // Replace with the block hash you want to get
api.getBlockByHash(blockHash).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block by its hash?

A: To get the block information of a specific block by its hash, you can use the getBlockByHash method and pass the block hash as an argument. Here is an example of how to get the block information of a specific block by its hash:

const blockHash = 'your_block_hash'; // Replace with the block hash you want to get
api.getBlockByHash(blockHash).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockByTimestamp` method and how is it used?

A: The getBlockByTimestamp method is used to get the block information of a specific block by its timestamp. It takes a timestamp as an argument and returns the block information. Here is an example of how to use the getBlockByTimestamp method:

const timestamp = 1234567890; // Replace with the timestamp you want to get
api.getBlockByTimestamp(timestamp).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block by its timestamp?

A: To get the block information of a specific block by its timestamp, you can use the getBlockByTimestamp method and pass the timestamp as an argument. Here is an example of how to get the block information of a specific block by its timestamp:

const timestamp = 1234567890; // Replace with the timestamp you want to get
api.getBlockByTimestamp(timestamp).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockByBlockId` method and how is it used?

A: The getBlockByBlockId method is used to get the block information of a specific block by its ID. It takes a block ID as an argument and returns the block information. Here is an example of how to use the getBlockByBlockId method:

const blockId = 'your_block_id'; // Replace with the block ID you want to get
api.getBlockByBlockId(blockId).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block by its ID?

A: To get the block information of a specific block by its ID, you can use the getBlockByBlockId method and pass the block ID as an argument. Here is an example of how to get the block information of a specific block by its ID:

const blockId = 'your_block_id'; // Replace with the block ID you want to get
api.getBlockByBlockId(blockId).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: What is the `getBlockByBlockNumber` method and how is it used?

A: The getBlockByBlockNumber method is used to get the block information of a specific block by its number. It takes a block number as an argument and returns the block information. Here is an example of how to use the getBlockByBlockNumber method:

const blockNumber = 123456; // Replace with the block number you want to get
api.getBlockByBlockNumber(blockNumber).then((block) => {
  console.log(block);
}).catch((error) => {
  console.error(error);
});

Q: How do I get the block information of a specific block by its number?

A: To get the block information of a specific block by its number, you can use the getBlockByBlockNumber method and pass the block number as an argument. Here is an example