Chain Data

Get Hedera's chain information using Arkhia's Json-RPC Relay.

info

To configure your web3Provider, please refer to the Getting Started Docs:

eth_chainId

Get chain id.

Parameters

None

Returns

Hex string or Integer: Current chain id

Web3.js

web3Provider.eth.getChainId()    .then((res) => console.log(`-> get chain ID`, res))    .catch(e => console.log('-> get chain ID error: ' + e));

Node.js (Axios)

import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_chainId",  "params": [],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_chainId",    "params":[],    "id": 0}'

eth_blockNumber

Get the current block number.

Parameters

None

Returns

Hex string or Integer: Current block number

Web3.js

web3Provider.eth.getBlockNumber()    .then((res) => console.log(`-> get block number`, res))    .catch(e => console.log('-> get block number error: ' + e));

Node.js (Axios)

import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_blockNumber",  "params": [],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_blockNumber",    "params":[],    "id": 0}'

eth_gasPrice

Get the current gas price.

Parameters

None

Returns

String: Current gas price

Web3.js

web3Provider.eth.getGasPrice()    .then((res) => console.log(`-> get gas price`, res))    .catch(e => console.log('-> get gas price error: ' + e));

Node.js (Axios)

import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_gasPrice",  "params": [],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_gasPrice",    "params":[],    "id": 0}'

eth_estimateGas

Get the current gas price.

Parameters

• Transaction: Transaction object Required

  • from - String|Number: The address for the sending account. Uses the web3.eth.defaultAccount property, if not specified. Or an address or index of a local wallet in web3.eth.accounts.wallet.
  • to - String: (optional) The destination address of the message, left undefined for a contract-creation transaction.
  • value - Number|String|BN|BigNumber: (optional) The value transferred for the transaction in wei, also the endowment if it’s a contract-creation transaction.
  • gas - Number: (optional, default: To-Be-Determined) The amount of gas to use for the transaction (unused gas is refunded).
  • gasPrice - Number|String|BN|BigNumber: (optional) The price of gas for this transaction in wei, defaults to web3.eth.gasPrice.
  • data - String: (optional) Either a ABI byte string containing the data of the function call on a contract, or in the case of a contract-creation transaction the initialisation code.
  • nonce - Number: (optional) Integer of the nonce. This allows to overwrite your own pending transactions that use the same nonce.
  • chain - String: (optional) Defaults to mainnet.

• Block: Integer block number, or the string "latest", "earliest" or "pending", see the default block parameter

Returns

Hex string or Integer: estimated gas for the transaction

Web3.js

web3Provider.eth.estimateGas({    from: "0x0030002e0030002e003400320032003700350035"})    .then((res) => console.log(`-> get Gas`, res))    .catch(e => console.log('-> get Gas error: ' + e));

Node.js (Axios)

import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_estimateGas",  "params": [    {      "from": "0x0030002e0030002e003400320032003700350035"    }  ],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_estimateGas",    "params":[{        "from": "0x0030002e0030002e003400320032003700350035"    }    ],    "id": 0}'

eth_getBlockByHash

Get block details using the block hash.

Parameters

• Block hash: Hash of the block Required

Returns

The block information

Web3.js

/*<BLOCK_HASH> can be found on hashscan https://hashscan.io/#/mainnet/dashboardfor example: 0x8b7de6e435b5a1f0f9b3dd49a7943bc654b86930abecf22792e45e203e3fe8fac17d7c93af28e079bf71908babf0d5f8*/web3Provider.eth.getBlock(`<BLOCK_HASH>`)    .then((res) => console.log(`-> get block by hash`, res))    .catch(e => console.log('-> get block by hash error: ' + e));

Node.js (Axios)

/*<BLOCK_HASH> can be found on hashscan https://hashscan.io/#/mainnet/dashboardfor example: 0x8b7de6e435b5a1f0f9b3dd49a7943bc654b86930abecf22792e45e203e3fe8fac17d7c93af28e079bf71908babf0d5f8*/import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_getBlockByHash",  "params": [    "<BLOCK_HASH>"  ],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

# <BLOCK_HASH> can be found on hashscan https://hashscan.io/#/mainnet/dashboard# for example: 0x8b7de6e435b5a1f0f9b3dd49a7943bc654b86930abecf22792e45e203e3fe8fac17d7c93af28e079bf71908babf0d5f8curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_getBlockByHash",    "params":["<BLOCK_HASH>"],    "id": 0}'

eth_getBlockByNumber

Get block details using the block number.

Parameters

• Block number: Number of the block or block tag (earliest, latest, pending) Required

Returns

The block information

Web3.js

/*<BLOCK_NUMBER> can be found on hashscan https://hashscan.io/#/mainnet/dashboardfor example: 38453581*/web3Provider.eth.getBlock(`<BLOCK_NUMBER>`)    .then((res) => console.log(`-> get block by number`, res))    .catch(e => console.log('-> get block by number error: ' + e));

Node.js (Axios)

/*<BLOCK_NUMBER> can be found on hashscan https://hashscan.io/#/mainnet/dashboardfor example: 38453581*/import axios from 'axios';const data = JSON.stringify({  "jsonrpc": "2.0",  "method": "eth_getBlockByNumber",  "params": [    "<BLOCK_NUMBER>"  ],  "id": 0});const config = {  method: 'post',  url: '<JSON_RPC_URL>/<YOUR_API_KEY>',  headers: {  'Content-Type': 'application/json'},  data : data};async function main() {    await axios(config)        .then(function (response) {        console.log(response.data));        });        .catch(function (error) {        console.log(error);        });}

Curl

# <BLOCK_NUMBER> can be found on hashscan https://hashscan.io/#/mainnet/dashboard# for example: 38453581curl --location --request POST '<JSON_RPC_URL>/<YOUR_API_KEY>' \--header 'Content-Type: application/json' \--data-raw '{    "jsonrpc": "2.0",    "method": "eth_getBlockByNumber",    "params":["<BLOCK_NUMBER>"],    "id": 0}'