Encoding userData

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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.
Solidity
js
Python
uint256 joinKind = 0;
uint256[] memory initBalances = new uint256[](2);
initBalances[0] = 1e18;
initBalances[1] = 2e18;
bytes memory userDataEncoded = abi.encode(joinKind, initBalances);
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);
import eth_abi
​
joinKind = 0
initBalances = [1e18, 2e18]
abi = ['uint256', 'uint256[]']
data = [joinKind, initBalances]
userDataEncoded = eth_abi.encode_abi(abi, data)

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