eth_call - SEI

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

Executes a new message call immediately without creating a transaction on the Sei blockchain. Useful for reading data from smart contracts or simulating transactions.

Parameters

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

Request

cURl

curl --location 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"],
    "id": "getblock.io"
}'

Axios

import axios from 'axios';

const url = 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/';

const payload = {
    jsonrpc: '2.0',
    method: 'eth_call',
    params: [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"],
    id: 'getblock.io'
};

axios.post(url, payload, {
    headers: { 'Content-Type': 'application/json' }
})
.then(response => console.log(response.data))
.catch(error => console.error(error));

Request

import requests
import json

url = "https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.json())

Rust

use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    
    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_call",
            "params": [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"],
            "id": "getblock.io"
        }))
        .send()
        .await?;
    
    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);
    
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x0000000000000000000000000000000000000000000000000000000000000064"
}

Response Parameters

Field	Type	Description
result	string	The return value of the executed contract call

Use Case

The eth_call 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

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/');

// Using ethers provider methods
const result = await provider.send('eth_call', [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"]);
console.log(result);

Viem

import { createPublicClient, http } from 'viem';
import { sei } from 'viem/chains';

const client = createPublicClient({
    chain: sei,
    transport: http('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/')
});

// Using viem's request method
const result = await client.request({
    method: 'eth_call',
    params: [{"to": "0x1234567890abcdef1234567890abcdef12345678", "data": "0x70a08231000000000000000000000000742d35cc6634c0532925a3b844bc9e7595f5be21"}, "latest"]
});
console.log(result);