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jupiterClient.ts
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jupiterClient.ts
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import {
AddressLookupTableAccount,
Connection,
PublicKey,
TransactionInstruction,
TransactionMessage,
VersionedTransaction,
} from '@solana/web3.js';
import fetch from 'node-fetch';
import { BN } from '@coral-xyz/anchor';
export type SwapMode = 'ExactIn' | 'ExactOut';
export interface MarketInfo {
id: string;
inAmount: number;
inputMint: string;
label: string;
lpFee: Fee;
notEnoughLiquidity: boolean;
outAmount: number;
outputMint: string;
platformFee: Fee;
priceImpactPct: number;
}
export interface Fee {
amount: number;
mint: string;
pct: number;
}
export interface Route {
amount: number;
inAmount: number;
marketInfos: MarketInfo[];
otherAmountThreshold: number;
outAmount: number;
priceImpactPct: number;
slippageBps: number;
swapMode: SwapMode;
}
export class JupiterClient {
url = 'https://quote-api.jup.ag/v4';
connection: Connection;
lookupTableCahce = new Map<string, AddressLookupTableAccount>();
constructor({ connection }: { connection: Connection }) {
this.connection = connection;
}
/**
* Get routes for a swap
* @param inputMint the mint of the input token
* @param outputMint the mint of the output token
* @param amount the amount of the input token
* @param slippageBps the slippage tolerance in basis points
* @param swapMode the swap mode (ExactIn or ExactOut)
* @param onlyDirectRoutes whether to only return direct routes
*/
public async getRoutes({
inputMint,
outputMint,
amount,
slippageBps = 50,
swapMode = 'ExactIn',
onlyDirectRoutes = false,
}: {
inputMint: PublicKey;
outputMint: PublicKey;
amount: BN;
slippageBps?: number;
swapMode?: SwapMode;
onlyDirectRoutes?: boolean;
}): Promise<Route[]> {
const params = new URLSearchParams({
inputMint: inputMint.toString(),
outputMint: outputMint.toString(),
amount: amount.toString(),
slippageBps: slippageBps.toString(),
swapMode,
onlyDirectRoutes: onlyDirectRoutes.toString(),
}).toString();
const { data: routes } = await (
await fetch(`https://quote-api.jup.ag/v4/quote?${params}`)
).json();
return routes;
}
/**
* Get a swap transaction for a route
* @param route the route to perform swap
* @param userPublicKey the signer's wallet public key
* @param slippageBps the slippage tolerance in basis points
*/
public async getSwapTransaction({
route,
userPublicKey,
slippageBps = 50,
}: {
route: Route;
userPublicKey: PublicKey;
slippageBps?: number;
}): Promise<VersionedTransaction> {
const resp = await (
await fetch(`${this.url}/swap`, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
route,
userPublicKey,
slippageBps,
}),
})
).json();
const { swapTransaction } = resp;
const swapTransactionBuf = Buffer.from(swapTransaction, 'base64');
return VersionedTransaction.deserialize(swapTransactionBuf);
}
/**
* Get the transaction message and lookup tables for a transaction
* @param transaction
*/
public async getTransactionMessageAndLookupTables({
transaction,
}: {
transaction: VersionedTransaction;
}): Promise<{
transactionMessage: TransactionMessage;
lookupTables: AddressLookupTableAccount[];
}> {
const message = transaction.message;
const lookupTables = (
await Promise.all(
message.addressTableLookups.map(async (lookup) => {
return await this.getLookupTable(lookup.accountKey);
})
)
).filter((lookup) => lookup);
const transactionMessage = TransactionMessage.decompile(message, {
addressLookupTableAccounts: lookupTables,
});
return {
transactionMessage,
lookupTables,
};
}
async getLookupTable(
accountKey: PublicKey
): Promise<AddressLookupTableAccount> {
if (this.lookupTableCahce.has(accountKey.toString())) {
return this.lookupTableCahce.get(accountKey.toString());
}
return (await this.connection.getAddressLookupTable(accountKey)).value;
}
/**
* Get the jupiter instructions from transaction by filtering out instructions to compute budget and associated token programs
* @param transactionMessage the transaction message
* @param inputMint the input mint
* @param outputMint the output mint
*/
public getJupiterInstructions({
transactionMessage,
inputMint,
outputMint,
}: {
transactionMessage: TransactionMessage;
inputMint: PublicKey;
outputMint: PublicKey;
}): TransactionInstruction[] {
return transactionMessage.instructions.filter((instruction) => {
if (
instruction.programId.toString() ===
'ComputeBudget111111111111111111111111111111'
) {
return false;
}
if (
instruction.programId.toString() ===
'TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA'
) {
return false;
}
if (
instruction.programId.toString() === '11111111111111111111111111111111'
) {
return false;
}
if (
instruction.programId.toString() ===
'ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL'
) {
const mint = instruction.keys[3].pubkey;
if (mint.equals(inputMint) || mint.equals(outputMint)) {
return false;
}
}
return true;
});
}
}