@horizon-protocol/data

horizon-data

This is a collection of utilities to query Horizon data from BSC. This data has been indexed by The Graph via the various subgraphs the Horizon team maintains (the subgraph code repo).

Supported queries

The below all return a Promise that resolves with the requested results.

1. depot.userActions({ user }) Get all depot deposit (zUSD) actions for the given user - deposit, withdrawl, unaccepted, removed.
2. depot.clearedDeposits({ fromAddress, toAddress }) Get all cleared zasset deposits (payments of ETH for zUSD) either from a given fromAddress or (and as well as) to a given toAddress
3. depot.exchanges({ from }) Get all depot exchanges (buying zUSD with ETH) for a given from address.
4. exchanges.total() Get the total exchange volume, total fees and total number of unique exchange addresses.
5. exchanges.rebates({ minTimestamp = 1 day ago }) Get the last N exchange rebates since the given minTimestamp in seconds. Ordered in reverse chronological order.
6. exchanges.reclaims({ minTimestamp = 1 day ago }) Get the last N exchange reclaims since the given minTimestamp in seconds. Ordered in reverse chronological order.
7. exchanges.since({ minTimestamp = 1 day ago }) Get the last N exchanges since the given minTimestamp (in seconds, so one hour ago is 3600). These are ordered in reverse chronological order.
8. rate.updates Get all rate updates for zassets in reverse chronological order
9. zassets.issuers Get all wallets that have invoked Issue on zUSD (other zassets to come)
10. zassets.transfers Get zasset transfers in reverse chronological order
11. zassets.holders Get all potential zasset holders
12. hzn.holders Get the list of wallets that have ever sent or received HZN.
13. hzn.rewards Get the list of reward escrow holders and their latest balance at vesting entry add or vest.
14. hzn.total Get the total count of unique issuers and hznHolders
15. hzn.transfers Get HZN transfers in reverse chronological order
16. hzn.issued Get the Issued events in reverse chronological order.
17. hzn.burned Get the Burned events in reverse chronological order.
18. hzn.feesClaimed Get the FeesClaimed events in reverse chronological order, showing fees in zUSD and rewards in hzn.
19. hzn.debtSnapshot Get the historical debt balance for any wallet address.
20. binaryOptions.markets Get all the binary options markets created.
21. binaryOptions.optionTransactions Get all the Bid and Refund transactions made to the binary options markets.
22. binaryOptions.historicalOptionPrice Get historical records of every option price for every market.
23. etherCollateral.loans Get the list of all EtherCollateral loans opened.
24. exchanger.exchangeEntriesSettled({ max, from }) Get the list of all settled exchanges.
25. exchanges.aggregate({ max, timeSeries }) Get the total amount of exchanges aggregated across various time series.
26. rate.hznAggregate({ max, timeSeries }) Get the price of hzn aggregated across various time series.
27. hzn.aggregateActiveStakers({ max, timeSeries }) Get the number of active stakers across various time series.
28. hzn.totalActiveStakers() Get the current number of active stakers.
29. rate.dailyRateChange({ zassets }) get the rate change over the past 24 hours for any zasset. Can pass in a list to retrieve multiple zassets.
30. liquidations.accountsRemovedFromLiquidation({ maxTime, minTime, account, max }) finds all the accounts that have fixed their c-ratio to avoid being at risk of liquidation after being flagged.
31. liquidations.accountsFlaggedForLiquidation({ minTime, maxTime, account, max }) finds all the accounts that have been flagged for liquidation.
32. liquidations.accountsLiquidated({ maxTime, minTime, account, max }) finds all the accounts that have been liquidated after being flagged for liquidation.
33. liquidations.getActiveLiquidations({ max, account, minTime, maxTime }) finds all the accounts that have been flagged and are still pending liquidation or in a waiting state. Can also just check for a specific account if desired.

Supported subscriptions

The below all return an Observable that when subscribed to with an object.

1. exchanges.observe() Get an observable to subscribe to that will next the latest exchanges in real time (replays the most recent exchange immediately).
2. rate.observe() Get an observable to subscribe to that will next the latest rates in real time (replays the most recent exchange immediately).

Use this as a node or webpack dependency

const hznData = require('horizon-data'); // common js
// or
import hznData from 'horizon-data'; // es modules

// query and log resolved results
hznData.exchanges
	.since({
		minTimestamp: Math.floor(Date.now() / 1e3) - 3600 * 24, // one day ago
	})
	.then(exchanges => console.log(exchanges));

// subscribe and log streaming results
hznData.exchanges.observe().subscribe({
	next(val) {
		console.log(val);
	},
	error: console.error,
	complete() {
		console.log('done');
	},
});

Use in a browser

<script src="//cdn.jsdelivr.net/npm/horizon-data/browser.js"></script>
<script>
	window.hznData.exchanges
		.since({
			minTimestamp: Math.floor(Date.now() / 1e3) - 3600 * 24, // one day ago
		})
		.then(console.log);

	window.hznData.exchanges.observe().subscribe({ next: console.log });
</script>

How to query via the npm library (CLI)

# get last 24 hours of exchange activity, ordered from latest to earliest
npx horizon-data exchanges.since

# get exchanges on horizon as they occur in real time (replays the last exchange first)
npx horizon-data exchanges.subscribe