Quick Reference

Summary

DA Builder exposes JSON-RPC endpoints for transaction submission, receipt polling, account balance monitoring, and transaction status tracking.

RPC Endpoints

Environment	URL
Mainnet	`https://da-builder.mainnet.spire.dev/`↗
Sepolia	`https://da-builder.sepolia.spire.dev/`↗

Use DA Builder endpoints for supported transaction submission and monitoring methods. Use a standard Ethereum RPC provider for reads, simulations, archive queries, logs, and direct fallback.

Contract Addresses

Contract	Mainnet	Sepolia
GasTank	`0x2565c0A726cB0f2F79cd16510c117B4da6a6534b`↗	`0x18Fa15ea0A34a7c4BCA01bf7263b2a9Ac0D32e92`↗
ProposerMulticall	`0x9ccc2f3ecdE026230e11a5c8799ac7524f2bb294`↗	`0x5132dCe9aD675b2ac5E37D69D2bC7399764b5469`↗
TrustedProposer	`0xC09f597034f654283a05B058EE1306534b837868`↗	`0x9ccc2f3ecdE026230e11a5c8799ac7524f2bb294`↗
TrustlessProposer	`0x1b3068A7dC934cCEBF7784cBd9266D80948a98A1`↗	`0x51922A1e2A010418bD709870Cd1ff13615070fa8`↗

Supported RPC Methods

For the OpenRPC playground, see https://da-builder.mainnet.spire.dev/docs↗.

Method	Auth	Parameters	Output	Use this when
`eth_sendRawTransaction`	Signed raw transaction	`[rawTransaction]`	transaction hash	Submit one signed transaction through DA Builder
`eth_getTransactionReceipt`	None beyond request body	`[transactionHash]`	Receipt or `null`	Poll the transaction hash
`eth_sendBundle`	Signed transaction in bundle	`[txs, blockNumber]` where `txs` contains one tx	transaction hash	Use simplified bundle submission
`dab_accountInfo`	`X-Flashbots-Signature`	`[accountAddress]`	`balance`, `outstanding_charge`	Check GasTank balance and pending charges
`dab_transactionStatus`	Optional token parameter	`[transactionHash]` or method-specific status params from OpenRPC	Status, cost, tracking details	Inspect transaction status and savings
`dab_getBatchedTransactionReceipt`	None beyond request body	`[batchedTransactionHash]`	Receipt or `null`	Get receipt by transaction hash

eth_sendRawTransaction and eth_sendBundle do not increment the EOA’s normal nonce in the same way as direct independent submission. Validate nonce handling in your transaction sender before production use.

Authentication For dab_accountInfo

dab_accountInfo requires a Flashbots-style header:

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

The signature is an EIP-191 signature over the JSON-RPC request body hash.

Minimal cURL Examples

Submit A Raw Transaction

curl -s https://da-builder.mainnet.spire.dev/ \
  -H "Content-Type: application/json" \
  --data '{
    "jsonrpc": "2.0",
    "method": "eth_sendRawTransaction",
    "params": ["0xSIGNED_RAW_TRANSACTION"],
    "id": 1
  }'

Poll A DA Builder Transaction Hash

curl -s https://da-builder.mainnet.spire.dev/ \
  -H "Content-Type: application/json" \
  --data '{
    "jsonrpc": "2.0",
    "method": "eth_getTransactionReceipt",
    "params": ["0xTRANSACTION_HASH"],
    "id": 1
  }'

Check Account Info

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
  }'

TypeScript Example: Authenticated Account Info

This example uses ethers v6 and Node.js 18+ fetch.

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

const rpcUrl = "https://da-builder.mainnet.spire.dev/";
const privateKey = process.env.SIGNER_PRIVATE_KEY!;
const account = process.env.DA_BUILDER_ACCOUNT!;

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

  const bodyHash = id(body);
  const signature = await wallet.signMessage(getBytes(bodyHash));
  const authHeader = `${wallet.address.toLowerCase()}:${signature}`;

  const response = await fetch(rpcUrl, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-Flashbots-Signature": authHeader
    },
    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 };
}

dabAccountInfo().then(console.log).catch((error) => {
  console.error(error);
  process.exit(1);
});

Internal Links

Quickstart - Fast TrustedProposer setup.
Full Integration Guide - Choose proposer path.
Monitor Account - Monitoring workflows.
Cost Structure - Pricing and GasTank charges.

​Summary

​RPC Endpoints

​Contract Addresses

​Supported RPC Methods

​Authentication For dab_accountInfo

​Minimal cURL Examples

​Submit A Raw Transaction

​Poll A DA Builder Transaction Hash

​Check Account Info

​TypeScript Example: Authenticated Account Info

​Internal Links