VaultTracker
A TypeScript wrapper for the VaultTracker smart contract.
Overview
The VaultTracker contract wrapper allows a user to fetch vault information for a particular market and owner.
Vault information is returned in a struct of the following shape:
Vault
interface Vault {
notional: string;
redeemable: string;
exchangeRate: string;
}Creating a VaultTracker instance
The snippet below illustrates how you can create a VaultTracker instance and what information you need to do so.
import { EthersVendor, VaultTracker } from '@swivel-finance/swivel-js';
import { ethers } from 'ethers';
// create an ethers provider and signer,...
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();
// ...create a Vendor for the VaultTracker contract,
const vendor = new EthersVendor(provider, signer);
// to create a VaultTracker instance you'll need the address of its
// deployed contract - each market has it's own VaultTracker contract
// you can retrieve the address of a VaultTracker by calling the
// `markets` method of the MarketPlace wrapper
// you will need the underlying token address and maturity of a market
// you can get them from the Swivel Exchange API
const underlying = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48';
const maturity = '1648177200';
// assuming you already created a MarketPlace instance,
// retrieve the desired market information...
const market = await marketPlace.markets(underlying, maturity);
// ...and extract the `vaultAddress` of the market
const vaultAddress = market.vaultAddr;
// use the `vendor` and `vaultAdrress` to instantiate the VaultTracker
const vaultTracker = new VaultTracker(vendor).at(vaultAddress);Properties
address
Holds the current contract address used by the VaultTracker instance.
Signature
Getters
admin
Allows a user to get the admin address of this VaultTracker. This is the address of the MarketPlace smart contract that owns this VaultTracker.
Signature
Returns
A promise that resolves with the admin address if the contract call succeeds and rejects otherwise.
swivel
Allows a user to get the Swivel contract address associated with this VaultTracker.
Signature
Returns
A promise that resolves with the Swivel contract's address if the contract call succeeds and rejects otherwise.
maturity
Allows a user to retrieve the vault's maturity. This is a Unix timestamp in seconds.
Signature
Returns
A promise that resolves with the vault's maturity if the contract call succeeds and rejects otherwise.
maturityRate
Allows a user to retrieve the vault's maturity rate. This is the cToken's exchange rate at the time of maturity.
Signature
Returns
A promise that resolves with the vault's maturity rate if the contract call succeeds and rejects otherwise.
cTokenAddr
Allows a user to retrieve the vault's cToken address.
Signature
Returns
A promise that resolves with the vault's cToken address if the contract call succeeds and rejects otherwise.
Methods
constructor
Creates an instance of the VaultTracker smart contract wrapper.
Signature
Parameters
v
Vendor
A vendor instance (ethers.js or web3.js vendor) to use.
at
Connects a VaultTracker instance to a deployed VaultTracker smart contract on chain.
Signature
Parameters
a
string
The address of the deployed VaultTracker smart contract.
o
TxOptions
Optional transaction options to override ethers.js' default transaction options.
Returns
The connected VaultTracker instance.
vaults
Allows a user to retrieve vault information for a specific owner from the VaultTracker.
Signature
Parameters
o
string
The address of the vault's owner.
Returns
A promise that resolves with a Vault if the contract call succeeds and rejects otherwise.
balancesOf
Allows a user to retrieve the notional and redeemable balances for a specific owner.
Signature
Parameters
o
string
The address of the vault's owner.
Returns
A promise that resolves with a tuple containing the notional and redeemable balance if the contract call succeeds and rejects otherwise.