encoding.md

Encoding userData

There are some arguments that need to be encoded when interacting with Balancer V2 Smart Contracts. For convenience, this page provides an example of how to encode arguments.

{% tabs %} {% tab title="Solidity" %}

uint256 joinKind = 0;
uint256[] memory initBalances = new uint256[](2);
initBalances[0] = 1e18;
initBalances[1] = 2e18;
bytes memory userDataEncoded = abi.encode(joinKind, initBalances);

{% endtab %}

{% tab title="js" %}

import { defaultAbiCoder } from '@ethersproject/abi';

const joinKind = 0;
const initBalances = [1e18, 2e18];
const abi = ['uint256', 'uint256[]'];
const data = [joinKind, initBalances];
const userDataEncoded = defaultAbiCoder.encode(abi,data);

{% endtab %}

{% tab title="Python" %}

import eth_abi

joinKind = 0
initBalances = [1e18, 2e18]
abi = ['uint256', 'uint256[]']
data = [joinKind, initBalances]
userDataEncoded = eth_abi.encode_abi(abi, data)

{% endtab %} {% endtabs %}