the-composer · TX Build

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://the-composer.fly.dev/tx/build", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "accounts": {
      "mint": "<base58 pubkey>"
    },
    "args": {
      "amount": "1000000",
      "max_sol_cost": "100000"
    },
    "instruction": "buy",
    "payer": "<base58 pubkey that will sign>",
    "programId": "6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P"
  }),
});
const data = await res.json();

curl -X POST \
  "https://the-composer.fly.dev/tx/build" \
  -H "Content-Type: application/json" \
  -d '{"accounts":{"mint":"<base58 pubkey>"},"args":{"amount":"1000000","max_sol_cost":"100000"},"instruction":"buy","payer":"<base58 pubkey that will sign>","programId":"6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "resolvedAccounts": [],
  "signers": [
    "<pubkey>"
  ],
  "transaction": "<base64 v0 tx>"
}