eth_getCode | Fantom

Fantom API method that retrieves the compiled bytecode of a smart contract, providing its address as a parameter. This method returns a hexadecimal string representing the smart contract's bytecode.

Developers can use this bytecode to verify whether a smart contract is legitimate and ensure that it performs its intended functions.

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Parameters

• address — the address of the smart contract to query.

• quantity or tag — the integer of a block encoded as hexadecimal or the string with:

  • latest — the most recent block in the blockchain and the current state of the blockchain at the most recent block. A chain reorganization is to be expected.

  • safe — the block that received justification from the beacon chain. Although this block could be involved in a chain reorganization, it would necessitate either a coordinated attack by the majority of validators or an instance of severe propagation latency.

  • finalized — the block accepted as canonical by more than 2/3 of the validators. A chain reorganization is extremely unlikely, and it would require at least 1/3 of the staked amount to be burned.

  • earliest — the earliest available or genesis block.

  • pending — the pending state and transactions block. The current state of transactions that have been broadcast to the network but have not yet been included in a block.

    📘

    See the default block parameter and How The Merge Impacts Ethereum’s Application Layer.

Response

data — the compiled bytecode of a smart contract. Returns 0x if the address is not associated with a smart contract.

eth_getCode code examples

The following example retrieves the compiled bytecode from the WFTM token smart contract.

const { Web3 } = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);

async function getCode(address, block) {
  const code = await web3.eth.getCode(address, block)
  console.log(code)
 }
 
 getCode("0x21be370D5312f44cB42ce377BC9b8a0cEF1A4C83", "latest" )

const ethers = require('ethers');
const NODE_URL = "CHAINSTACK_NODE_URL";
const provider = new ethers.JsonRpcProvider(NODE_URL);

const getCode = async (address, block) => {
    const code = await provider.send("eth_getCode", [address, block]);
    console.log(code);
  };

  getCode("0x21be370D5312f44cB42ce377BC9b8a0cEF1A4C83", "latest")

from web3 import Web3  
node_url = "CHAINSTACK_NODE_URL" 

code = web3.eth.get_code("0x21be370D5312f44cB42ce377BC9b8a0cEF1A4C83", "latest") 
print(web3.to_hex(code))   # Convert the Bytes result into HEX.

Use case

A practical use case for the eth_getcode method is verifying whether an address is associated with a smart contract. This can be particularly useful for blockchain explorers, auditors, and DApp developers, who must ensure that the account they interact with is legitimate.

Try the eth_getCode RPC method yourself