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Save zhe-t/60938c69e29276b7a9f098e1b0672c79 to your computer and use it in GitHub Desktop.
| import { Connection, SendOptions } from '@solana/web3.js'; | |
| export type JitoRegion = 'mainnet' | 'amsterdam' | 'frankfurt' | 'ny' | 'tokyo'; | |
| export const JitoEndpoints = { | |
| mainnet: 'https://mainnet.block-engine.jito.wtf/api/v1/transactions', | |
| amsterdam: 'https://amsterdam.mainnet.block-engine.jito.wtf/api/v1/transactions', | |
| frankfurt: 'https://frankfurt.mainnet.block-engine.jito.wtf/api/v1/transactions', | |
| ny: 'https://ny.mainnet.block-engine.jito.wtf/api/v1/transactions', | |
| tokyo: 'https://tokyo.mainnet.block-engine.jito.wtf/api/v1/transactions', | |
| }; | |
| export function getJitoEndpoint(region: JitoRegion) { | |
| return JitoEndpoints[region]; | |
| } | |
| /** | |
| * Send a transaction using Jito. This only supports sending a single transaction on mainnet only. | |
| * See https://jito-labs.gitbook.io/mev/searcher-resources/json-rpc-api-reference/transactions-endpoint/sendtransaction. | |
| * @param args.serialisedTx - A single transaction to be sent, in serialised form | |
| * @param args.region - The region of the Jito endpoint to use | |
| */ | |
| export async function sendTxUsingJito({ | |
| serializedTx, | |
| region = 'mainnet' | |
| }: { | |
| serializedTx: Uint8Array | Buffer | number[]; | |
| region: JitoRegion; | |
| }) { | |
| let rpcEndpoint = getJitoEndpoint(region); | |
| let encodedTx = bs58.encode(serializedTx); | |
| let payload = { | |
| jsonrpc: "2.0", | |
| id: 1, | |
| method: "sendTransaction", | |
| params: [encodedTx] | |
| }; | |
| let res = await fetch(`${rpcEndpoint}?bundleOnly=true`, { | |
| method: 'POST', | |
| body: JSON.stringify(payload), | |
| headers: { 'Content-Type': 'application/json' } | |
| }); | |
| let json = await res.json(); | |
| if (json.error) { | |
| throw new Error(json.error.message); | |
| } | |
| return json; | |
| } |
anyone know how to fix this
MEV opportunity found! Potential Profit: 0.000307478 SOL
Executing flash loan swaps with Jito...
Creating MarginFi account...
------ Transaction Details 👇 ------
📝 Executing 1 transaction
📡 Broadcast type: BUNDLE
💸 Bundle tip: undefined SOL
Error: API bundle failed: Bundle must tip at least 1000 lamports
I'm very familiar with MEV project and made some profits from it.
If you need help, please let me know @cool0328 in telegram.
@yanCode thats not my issue anymore I resolved that part by downgrading marginfi to 4.04. My main issue now is I’m trying to use Jupiter quote/swaps an I get a unit8array or getting over the solana transaction size limit of 1232. I also see ppl using a custom on chain program and their transactions succeeds.
you have discord or telegram we can chat there and if you got time can assist me!
one solution i know to bypass the transaction limit is to split the oversize transaction to many, jito bundle can submit up to 5 transactions together.
but if the transaction is returned by Jupiter quote/swaps, i don't think it should be oversize. because itself can execute the swap transaction if we don't send it via jito bundle.
I also see ppl using a custom on chain program, well, it sounds intertesting to me.
my telgram is @tszsy
How do I proceed to obtain an API key for jito bundles? I tried on: Jito: discord.gg/jito-labs and it says the invitation is not valid. I tried on the web page: jito Labs Discord / https://www.jito.wtf/ and I still couldn't send a request for the Api.
@yanCode thats not my issue anymore I resolved that part by downgrading marginfi to 4.04. My main issue now is I’m trying to use Jupiter quote/swaps an I get a unit8array or getting over the solana transaction size limit of 1232. I also see ppl using a custom on chain program and their transactions succeeds.
you have discord or telegram we can chat there and if you got time can assist me!