:warning: Not Maintained: This repo has been archived for historical purposes and is not maintained. Check docs.venus.io for documentation on how to interact with the protocol.
A JavaScript SDK for Binance Smart Chain and the Venus Protocol. Wraps around Ethers.js. Works in the web browser and Node.js.
This SDK is in open beta, and is constantly under development. USE AT YOUR OWN RISK.
JSON RPC based Binance Smart Chain read and write.
const Venus = require('@swipewallet/venus-js'); // in Node.js
const vUsdtAddress = Venus.util.getAddress(Venus.vUSDT);
(async function() {
let supplyRatePerBlock = await Venus.eth.read(
vUsdtAddress,
'function supplyRatePerBlock() returns (uint)',
[], // [optional] parameters
{} // [optional] call options, provider, network, ethers.js "overrides"
);
console.log('USDT supplyRatePerBlock:', supplyRatePerBlock.toString());
})().catch(console.error);const toAddress = '0xa0df350d2637096571F7A701CBc1C5fdE30dF76A';
(async function() {
const trx = await Venus.eth.trx(
toAddress,
'function send() external payable',
[],
{
value: Venus._ethers.utils.parseEther('1.0'), // 1 ETH
provider: window.ethereum, // in a web browser
}
);
const toAddressEthBalance = await Venus.eth.getBalance(toAddress);
})().catch(console.error);Simple methods for using the Venus protocol.
const venus = new Venus(window.ethereum); // in a web browser
// Ethers.js overrides are an optional 3rd parameter for `supply`
// const trxOptions = { gasLimit: 250000, mantissa: false };
(async function() {
console.log('Supplying ETH to the Venus protocol...');
const trx = await venus.supply(Venus.ETH, 1);
console.log('Ethers.js transaction object', trx);
})().catch(console.error);Web Browser
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@swipewallet/venus-js@latest/dist/browser/venus.min.js"></script>
<script type="text/javascript">
window.Venus; // or `Venus`
</script>Node.js
npm install @swipewallet/venus-jsconst Venus = require('@swipewallet/venus-js');
// or, when using ES6
import Venus from '@swipewallet/venus-js';To run, boot Ganache fork of mainnet locally
The following are valid Binance Smart Chain providers for initialization of the SDK.
var venus = new Venus(window.ethereum); // web browser
var venus = new Venus('http://127.0.0.1:8545'); // HTTP provider
var venus = new Venus(); // Uses Ethers.js fallback mainnet (for testing only)
var venus = new Venus('testnet'); // Uses Ethers.js fallback (for testing only)
// Init with private key (server side)
var venus = new Venus('http://127.0.0.1:8545', {
privateKey: '0x_your_private_key_', // preferably with environment variable
});
// Init with HD mnemonic (server side)
var venus = new Venus('mainnet' {
mnemonic: 'clutch captain shoe...', // preferably with environment variable
});Names of contracts, their addresses, ABIs, token decimals, and more can be found in /src/constants.ts. Addresses, for all networks, can be easily fetched using the getAddress function, combined with contract name constants.
console.log(Venus.BUSD, Venus.BNB, Venus.vSXP);
// BUSD, BNB, vSXP
const vUsdtAddress = Venus.util.getAddress(Venus.vUSDT);
// Mainnet vUSDT address. Second parameter can be a network like 'testnet'.Parameters of number values can be plain numbers or their scaled up mantissa values. There is a transaction option boolean to tell the SDK what the developer is passing.
// 1 BUSD
await venus.borrow(Venus.BUSD, '1000000000000000000', { mantissa: true });
// `mantissa` defaults to false if it is not specified or if an options object is not passed
await venus.borrow(Venus.BUSD, 1, { mantissa: false });Each method that interacts with the blockchain accepts a final optional parameter for overrides, much like Ethers.js overrides.
// The options object itself and all options are optional
const trxOptions = {
mantissa, // Boolean, parameters array arg of 1 ETH would be '1000000000000000000' (true) vs 1 (false)
abi, // Definition string or an ABI array from a solc build
provider, // JSON RPC string, Web3 object, or Ethers.js fallback network (string)
network, // Ethers.js fallback network provider, "provider" has precedence over "network"
from, // Address that the Binance Smart Chain transaction is send from
gasPrice, // Ethers.js override `Venus._ethers.utils.parseUnits('10.0', 'gwei')`
gasLimit, // Ethers.js override - see https://docs.ethers.io/ethers.js/v5-beta/api-contract.html#overrides
value, // Number or string
data, // Number or string
chainId, // Number
nonce, // Number
privateKey, // String, meant to be used with `Venus.eth.trx` (server side)
mnemonic, // String, meant to be used with `Venus.eth.trx` (server side)
};The Venus API is accessible from Venus.js. The corresponding services are defined in the api namespace on the class.
Venus.api.accountVenus.api.vTokenVenus.api.marketHistoryVenus.api.governanceThe governance method requires a second parameter (string) for the corresponding endpoint shown in the documentation.
proposalsvoteReceiptsaccountsHere is an example for using the account endpoint. The network parameter in the request body is optional and defaults to mainnet.
const main = async () => {
const account = await Venus.api.account({
"addresses": "0xB61C5971d9c0472befceFfbE662555B78284c307",
"network": "testnet"
});
let sxpBorrowBalance = 0;
if (Object.isExtensible(account) && account.accounts) {
account.accounts.forEach((acc) => {
acc.tokens.forEach((tok) => {
if (tok.symbol === Venus.vSXP) {
sxpBorrowBalance = +tok.borrow_balance_underlying.value;
}
});
});
}
console.log('sxpBorrowBalance', sxpBorrowBalance);
}
main().catch(console.error);git clone git@github.com:venusprotocol/venus-js.git
cd venus-js/
npm install
npm run build<!-- Local build (do `npm install` first) -->
<script type="text/javascript" src="https://github.com/VenusProtocol/venus-js/raw/master/dist/browser/venus.min.js"></script>
<!-- Public NPM -> jsdeliver build -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@swipewallet/venus-js@latest/dist/browser/venus.min.js"></script>// Local build (do `npm install` first)
const Venus = require('./dist/nodejs/index.js');
// Public NPM build
const Venus = require('@swipewallet/venus-js');