Noctiflorous Pansy Mulch

# npm

## @drift-labs/sdk

0.1.12 • Public • Published

# Drift Protocol v1

This repository provides open source access to Drift's Typescript SDK, Solana Programs, and more.

# SDK Guide

The technical documentation for the SDK can be found here, and you can visit Drift's general purpose documentation here.

## Installation

npm i @drift-labs/sdk


## Getting Started

### Setting up a wallet for your program

# Generate a keypair
solana-keygen new

# Get the pubkey for the new wallet (You will need to send USDC to this address to Deposit into Drift (only on mainnet - devnet has a faucet for USDC))

# Put the private key into your .env to be used by your bot
cd {projectLocation}
echo BOT_PRIVATE_KEY=cat ~/.config/solana/id.json >> .env

## Concepts

### BN / Precision

The Drift SDK uses BigNum (BN), using this package, to represent numerical values. This is because Solana tokens tend to use levels of precision which are too precise for standard Javascript floating point numbers to handle. All numbers in BN are represented as integers, and we will often denote the precision of the number so that it can be converted back down to a regular number.

Example:
a BigNum: 10,500,000, with precision 10^6, is equal to 10.5 because 10,500,000 / 10^6 = 10.5.

The Drift SDK uses some common precisions, which are available as constants to import from the SDK.

Precision Name Value
QUOTE_PRECISION 10^6
MARK_PRICE_PRECISION 10^10
AMM_RESERVE_PRECISION 10^13
FUNDING_PAYMENT_PRECISION 10^4
PEG_PRECISION 10^3

Important Note for BigNum division

Because BN only supports integers, you need to be conscious of the numbers you are using when dividing. BN will return the floor when using the regular division function; if you want to get the exact divison, you need to add the modulus of the two numbers as well. There is a helper function convertToNumber in the SDK which will do this for you.

import {convertToNumber} from @drift-labs/sdk

// Gets the floor value
new BN(10500).div(new BN(1000)).toNumber(); // = 10

// Gets the exact value
new BN(10500).div(new BN(1000)).toNumber() + BN(10500).mod(new BN(1000)).toNumber(); // = 10.5

// Also gets the exact value
convertToNumber(new BN(10500), new BN(1000)); // = 10.5

## Examples

### Setting up an account and making a trade

import { BN, Provider, Wallet } from '@project-serum/anchor';
import { Token, TOKEN_PROGRAM_ID } from '@solana/spl-token';
import { Connection, Keypair, PublicKey } from '@solana/web3.js';
import {
calculateMarkPrice,
ClearingHouse,
ClearingHouseUser,
initialize,
Markets,
PositionDirection,
convertToNumber,
MARK_PRICE_PRECISION,
QUOTE_PRECISION,
} from '@drift/sdk';

userPubKey: string
): Promise<PublicKey> => {
new PublicKey(ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL),
TOKEN_PROGRAM_ID,
new PublicKey(userPubKey)
);
};

const main = async () => {
// Initialize Drift SDK
const sdkConfig = initialize({ env: 'devnet' });

// Set up the Wallet and Provider
const privateKey = process.env.BOT_PRIVATE_KEY; // stored as an array string
const keypair = Keypair.fromSecretKey(
Uint8Array.from(JSON.parse(privateKey))
);
const wallet = new Wallet(keypair);

// Set up the Connection
const rpcAddress = process.env.RPC_ADDRESS; // can use: https://api.devnet.solana.com for devnet; https://api.mainnet-beta.solana.com for mainnet;

// Set up the Provider
const provider = new Provider(connection, wallet, Provider.defaultOptions());

// Check SOL Balance
const lamportsBalance = await connection.getBalance(wallet.publicKey);
console.log('SOL balance:', lamportsBalance / 10 ** 9);

// Misc. other things to set up
wallet.publicKey.toString()
);

// Set up the Drift Clearing House
const clearingHousePublicKey = new PublicKey(
sdkConfig.CLEARING_HOUSE_PROGRAM_ID
);
const clearingHouse = ClearingHouse.from(
connection,
provider.wallet,
clearingHousePublicKey
);
await clearingHouse.subscribe();

// Set up Clearing House user client
const user = ClearingHouseUser.from(clearingHouse, wallet.publicKey);

//// Check if clearing house account exists for the current wallet
const userAccountExists = await user.exists();

if (!userAccountExists) {
//// Create a Clearing House account by Depositing some USDC ($10,000 in this case) const depositAmount = new BN(10000).mul(QUOTE_PRECISION); await clearingHouse.initializeUserAccountAndDepositCollateral( depositAmount, await getTokenAddress( usdcTokenAddress.toString(), wallet.publicKey.toString() ) ); } await user.subscribe(); // Get current price const solMarketInfo = Markets.find( (market) => market.baseAssetSymbol === 'SOL' ); const currentMarketPrice = calculateMarkPrice( clearingHouse.getMarket(solMarketInfo.marketIndex) ); const formattedPrice = convertToNumber(currentMarketPrice, QUOTE_PRECISION); console.log(Current Market Price is $${formattedPrice}); // Estimate the slippage for a 5000 LONG trade const solMarketAccount = clearingHouse.getMarket(solMarketInfo.marketIndex); const slippage = convertToNumber( calculateTradeSlippage( PositionDirection.LONG, new BN(5000).mul(QUOTE_PRECISION), solMarketAccount )[0], MARK_PRICE_PRECISION ); console.log( Slippage for a 5000 LONG on the SOL market would be$${slippage} ); // Make a$5000 LONG trade
await clearingHouse.openPosition(
PositionDirection.LONG,
new BN(5000).mul(QUOTE_PRECISION),
solMarketInfo.marketIndex
);
console.log(LONGED $5000 worth of SOL); // Reduce the position by$2000
await clearingHouse.openPosition(
PositionDirection.SHORT,
new BN(2000).mul(QUOTE_PRECISION),
solMarketInfo.marketIndex
);

// Close the rest of the position
await clearingHouse.closePosition(solMarketInfo.marketIndex);
};

main();

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Drift SDK by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.

## Keywords

### Install

npm i @drift-labs/sdk@0.1.12

### Repository

github.com/drift-labs/protocol-v1

0.1.12

Apache-2.0

506 kB

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