unlocking data on substrate

index.js

var { ApiPromise, WsProvider } = require('@polkadot/api');
var { BN_ZERO } = require('@polkadot/util');

async function main() {
	const provider = new WsProvider("wss://kusama-rpc.polkadot.io/", false);
	provider.connect();
	const api = await ApiPromise.create({ provider });

	// Get general information about the node we are connected to
	const [chain, nodeName, nodeVersion] = await Promise.all([
		api.rpc.system.chain(),
		api.rpc.system.name(),
		api.rpc.system.version()
	]);
	console.log(
		`Connected to ${chain} using ${nodeName} v${nodeVersion}`
	);

	let result = await api.query.staking.ledger.entries();

	let total = {};

	for (ledger of result) {
		let data = ledger[1].unwrap().unlocking;
		for (chunk of data) {
			let era = chunk.era.toNumber();
			let value = chunk.value.toBn();
			if (!(era in total)) {
				total[era] = BN_ZERO;
			}
			total[era] = total[era].add(value);
		}
	}

	for (const [era, value] of Object.entries(total)) {
		console.log(`${era}: ${toFixed(value)}`)
	}

	provider.disconnect()
}

function toFixed(input) {
	let total_string = input.toString();
	let fixed_point = 12;
	let insert_point = total_string.length - fixed_point;
	var total_fixed = total_string.substring(0, insert_point) + "." + total_string.substring(insert_point);
	return total_fixed;
}

main().catch(console.error);