solana-multiagent/solana-agent-kit/tools/pumpfun/launch_pumpfun_token.js

// src/tools/launch_pumpfun_token.ts
import { Keypair, VersionedTransaction } from "@solana/web3.js"

async function uploadMetadata(
  tokenName,
  tokenTicker,
  description,
  imageUrl,
  options
) {
  // Create metadata object
  const formData = new URLSearchParams()
  formData.append("name", tokenName)
  formData.append("symbol", tokenTicker)
  formData.append("description", description)

  formData.append("showName", "true")

  if (options?.twitter) {
    formData.append("twitter", options.twitter)
  }
  if (options?.telegram) {
    formData.append("telegram", options.telegram)
  }
  if (options?.website) {
    formData.append("website", options.website)
  }

  const imageResponse = await fetch(imageUrl)
  const imageBlob = await imageResponse.blob()
  const files = {
    file: new File([imageBlob], "token_image.png", { type: "image/png" })
  }

  // Create form data with both metadata and file
  const finalFormData = new FormData()
  // Add all metadata fields
  for (const [key, value] of formData.entries()) {
    finalFormData.append(key, value)
  }
  // Add file if exists
  if (files?.file) {
    finalFormData.append("file", files.file)
  }

  const metadataResponse = await fetch("https://pump.fun/api/ipfs", {
    method: "POST",
    body: finalFormData
  })

  if (!metadataResponse.ok) {
    throw new Error(`Metadata upload failed: ${metadataResponse.statusText}`)
  }

  return await metadataResponse.json()
}

async function createTokenTransaction(
  agent,
  mintKeypair,
  metadataResponse,
  options
) {
  const payload = {
    publicKey: agent.wallet_address.toBase58(),
    action: "create",
    tokenMetadata: {
      name: metadataResponse.metadata.name,
      symbol: metadataResponse.metadata.symbol,
      uri: metadataResponse.metadataUri
    },
    mint: mintKeypair.publicKey.toBase58(),
    denominatedInSol: "true", // API expects string "true"
    amount: options?.initialLiquiditySOL || 0.0001,
    slippage: options?.slippageBps || 5,
    priorityFee: options?.priorityFee || 0.00005,
    pool: "pump"
  }

  const response = await fetch("https://pumpportal.fun/api/trade-local", {
    method: "POST",
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify(payload)
  })

  if (!response.ok) {
    const errorText = await response.text()
    throw new Error(
      `Transaction creation failed: ${response.status} - ${errorText}`
    )
  }

  return response
}

async function signAndSendTransaction(kit, tx, mintKeypair) {
  try {
    // Get the latest blockhash
    const {
      blockhash,
      lastValidBlockHeight
    } = await kit.connection.getLatestBlockhash()

    // Update transaction with latest blockhash
    tx.message.recentBlockhash = blockhash

    // Sign the transaction
    const signedTx = await kit.wallet.signTransaction(tx)
    signedTx.sign([mintKeypair])

    // Send and confirm transaction with options
    const signature = await kit.connection.sendTransaction(signedTx, {
      skipPreflight: false,
      preflightCommitment: "confirmed",
      maxRetries: 5
    })

    // Wait for confirmation
    const confirmation = await kit.connection.confirmTransaction({
      signature,
      blockhash,
      lastValidBlockHeight
    })

    if (confirmation.value.err) {
      throw new Error(`Transaction failed: ${confirmation.value.err}`)
    }

    return signature
  } catch (error) {
    console.error("Transaction send error:", error)
    if (error instanceof Error && "logs" in error) {
      console.error("Transaction logs:", error.logs)
    }
    throw error
  }
}

/**
 * Launch a token on Pump.fun
 * @param agent - SolanaAgentKit instance
 * @param tokenName - Name of the token
 * @param tokenTicker - Ticker of the token
 * @param description - Description of the token
 * @param imageUrl - URL of the token image
 * @param options - Optional token options (twitter, telegram, website, initialLiquiditySOL, slippageBps, priorityFee)
 * @returns - Signature of the transaction, mint address and metadata URI, if successful, else error
 */
export async function launchPumpFunToken(
  agent,
  tokenName,
  tokenTicker,
  description,
  imageUrl,
  options
) {
  try {
    const mintKeypair = Keypair.generate()
    const metadataResponse = await uploadMetadata(
      tokenName,
      tokenTicker,
      description,
      imageUrl,
      options
    )
    const response = await createTokenTransaction(
      agent,
      mintKeypair,
      metadataResponse,
      options
    )
    const transactionData = await response.arrayBuffer()
    const tx = VersionedTransaction.deserialize(new Uint8Array(transactionData))
    const signature = await signAndSendTransaction(agent, tx, mintKeypair)

    return {
      signature,
      mint: mintKeypair.publicKey.toBase58(),
      metadataUri: metadataResponse.metadataUri
    }
  } catch (error) {
    console.error("Error in launchpumpfuntoken:", error)
    if (error instanceof Error && "logs" in error) {
      console.error("Transaction logs:", error.logs)
    }
    throw error
  }
}