Monitor Account

curl -s https://da-builder.mainnet.spire.dev/ \
  -H "Content-Type: application/json" \
  -H "X-Flashbots-Signature: 0xYOUR_ADDRESS:0xYOUR_SIGNATURE" \
  --data '{
    "jsonrpc": "2.0",
    "method": "dab_accountInfo",
    "params": ["0xYOUR_ACCOUNT_ADDRESS"],
    "id": 1
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "balance": "1000000000000000000",
    "outstanding_charge": "50000000000000000"
  }
}

X-Flashbots-Signature: <address>:<signature>

import { Wallet, getBytes, id } from "ethers";

const rpcUrl = "https://da-builder.mainnet.spire.dev/";

async function accountInfo(privateKey: string, account: string) {
  const wallet = new Wallet(privateKey);
  const body = JSON.stringify({
    jsonrpc: "2.0",
    method: "dab_accountInfo",
    params: [account],
    id: 1
  });

  const signature = await wallet.signMessage(getBytes(id(body)));

  const response = await fetch(rpcUrl, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-Flashbots-Signature": `${wallet.address.toLowerCase()}:${signature}`
    },
    body
  });

  const json = await response.json();
  if (json.error) throw new Error(`${json.error.code}: ${json.error.message}`);
  return json.result as { balance: string; outstanding_charge: string };
}