Module 4: Advanced APIs

// Staking operations
console.log('=== Staking APIs ===');

// Get current era
const currentEra = await api.query.staking.currentEra();
console.log('Current era:', currentEra.toString());

// Get active validators
const validators = await api.query.session.validators();
console.log('Active validators:', validators.length);

// Get validator exposure for current era
const validatorAddress = '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY';
const exposure = await api.query.staking.erasStakers(currentEra, validatorAddress);
console.log('Validator exposure:', exposure.toHuman());

// Get nominator's nominations
const nominatorAddress = '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY';
const nominations = await api.query.staking.nominators(nominatorAddress);
console.log('Nominations:', nominations.toHuman());

// Get staking rewards
const rewards = await api.query.staking.erasRewardPoints(currentEra);
console.log('Reward points:', rewards.toHuman());

// Nominate validators (example transaction)
const validatorsToNominate = [
  '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY',
  '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty'
];

const nominateTx = api.tx.staking.nominate(validatorsToNominate);
console.log('Nomination transaction created');

// Bond additional funds
const bondAmount = 1000000000000; // 1 WND
const bondTx = api.tx.staking.bondExtra(bondAmount);
console.log('Bond extra transaction created');

// Unbond funds
const unbondAmount = 500000000000; // 0.5 WND
const unbondTx = api.tx.staking.unbond(unbondAmount);
console.log('Unbond transaction created');