vertex

import {  ActionGetResponse,  ActionPostResponse,  ACTIONS_CORS_HEADERS,  createPostResponse,} from "@solana/actions";import { blinkActionPostSchema } from "@/lib/schemas";import {  PublicKey,  Transaction,  SystemProgram,  TransactionInstruction,} from "@solana/web3.js";import {  createAssociatedTokenAccountInstruction,  createTransferInstruction,  getAccount,  getAssociatedTokenAddress,} from "@solana/spl-token";import {  calculatePaymentBreakdown,  decodePaymentRequest,  getPaymentUrl,  getTokenMint,

1. Line 2 ActionGetResponse,: The metadata a Blink client renders (title, icon, buttons).
2. Line 3 ActionPostResponse,: Returns the serialized transaction the wallet will sign.
3. Line 16 createTransferInstruction,: An SPL token transfer through the Token Program.

                mintPubkey              )            );          }           transaction.add(            createTransferInstruction(              senderAta,              treasuryAta,              publicKey,              toAtomicUnits(breakdown.platformFee, request.token)            )          );        }      }       const signature = await sendTransaction(transaction, connection);      const latestBlockhash = await connection.getLatestBlockhash();      await connection.confirmTransaction({        signature,        blockhash: latestBlockhash.blockhash,        lastValidBlockHeight: latestBlockhash.lastValidBlockHeight,      });

1. Line 247 createTransferInstruction(: An SPL token transfer through the Token Program.
2. Line 257 const signature = await sendTransaction(transaction, connection);: Submits the signed transaction to the cluster.
3. Line 258 const latestBlockhash = await connection.getLatestBlockhash();: Fetches a recent blockhash. Transactions expire if it gets too old.