eth_estimateGas - SEI

Example code for the eth_estimateGas JSON-RPC method. Complete guide on how to use eth_estimateGas JSON-RPC in GetBlock Web3 documentation.

Estimates the gas necessary to complete a transaction on the Sei network. The estimate may be higher than the actual gas used.

Parameters

Parameter	Type	Description
transaction	object	The transaction object with 'from', 'to', 'gas', 'gasPrice', 'value', 'data' fields
block	string	Block number in hex, or 'latest', 'earliest', 'pending' (optional)

Request

cURL

cURL

curl --location 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [{"from": "0x742d35Cc6634C0532925a3b844Bc9e7595f5bE21", "to": "0x1234567890abcdef1234567890abcdef12345678", "value": "0x9184e72a"}],
    "id": "getblock.io"
}'

Axios

Request

Rust

Response

Response (JSON)

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x5208"
}

Response Parameters

Field	Type	Description
result	string	The estimated gas amount as a hexadecimal string

Use Case

The eth_estimateGas method is essential for:

• Blockchain developers building applications on Sei

• Wallet applications requiring network data

• Analytics platforms tracking Sei network activity

• DeFi protocols integrating with Sei's parallelized EVM

Error Handling

Common errors when using this method:

Error Code	Message	Description
-32700	Parse error	Invalid JSON
-32600	Invalid Request	JSON is not a valid request object
-32601	Method not found	Method does not exist
-32602	Invalid params	Invalid method parameters
-32603	Internal error	Internal JSON-RPC error
-32000	Invalid input	Generic input error
-32500	Cross-VM error	Error in cross-VM operation (Sei-specific)

Web3 Integration

Ethers.js

Ethers.js

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

// Using ethers provider methods
const result = await provider.send('eth_estimateGas', [{"from": "0x742d35Cc6634C0532925a3b844Bc9e7595f5bE21", "to": "0x1234567890abcdef1234567890abcdef12345678", "value": "0x9184e72a"}]);
console.log(result);

Viem