async lock(amount: bigint, duration: bigint): Promise<string>

async extendLock(lockId: bigint, additionalDuration: bigint): Promise<string>

async unlock(lockId: bigint): Promise<string>

async getVotingPower(address: string): Promise<bigint>

async getLock(lockId: bigint): Promise<VeNOTALock>

async getTotalSupply(): Promise<bigint>

import { Notareum } from "@notareum/sdk";
import { Contract, parseUnits } from "ethers";

const ntm = Notareum({ provider, signer, contracts });

const me = await signer.getAddress();

// 1. Approve NOTA for veNOTA
const notaAbi = ["function approve(address,uint256) returns (bool)"];
const amount = parseUnits("5000", 18); // 5,000 NOTA
const nota = new Contract(contracts.notaToken, notaAbi, signer);
await (await nota.approve(contracts.veNota, amount)).wait();

// 2. Lock for 2 years
const twoYears = 2n * 365n * 24n * 60n * 60n;
const lockTx = await ntm.governance.lock(amount, twoYears);
console.log("Locked:", lockTx);

// 3. Check voting power now vs. later
const nowPower = await ntm.governance.getVotingPower(me);
console.log("veNOTA now:", nowPower.toString());