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Prerequisites

Before submitting an API request, ensure you have completed the following:
You need a Maestro Composer-level subscription or higher to access the Turbo Transactions feature. Otherwise, you can use the Submit Transaction endpoint.

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Steps to Submit an API Request

Turbo Transactions supercharge your transaction submission processes. This guide will walk you through generating a transaction on Eternl and sending it to Maestro’s Turbo Transaction endpoint.

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1. Prepare Your Wallet

  • Switch the network to Pre-Production Testnet by selecting it from the bottom-right selector of the Eternl wallet interface.
  • Create or restore two separate wallets in Eternl to test the transaction.
  • After creating the wallets, disable the Transaction Auto Submit option.
  • Find your wallet address in the Eternl dashboard under the Receive tab.
  • Send test ADA (tADA) to one (or both) wallets using the Cardano Faucet here.

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2. Configure Eternl to Use Maestro’s Turbo Submit Endpoint

  • Open Eternl App Settings
  • Expand the Custom Submit API Endpoint section and click Add
  • Enter the below Turbo Transaction Submit API URL, replacing <API_KEY> with your project key found in your project dashboard. 
    https://preprod.gomaestro-api.org/v1/txmanager/turbosubmit?api-key=<API_KEY>
  • Click Save
  • If your subscription does not support Turbo Transactions, you can try the standard **Submit **API.
  • Upgrade to the Pay-as-you-go Conductor subscription for easy access and support for Turbo Transactions.

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3. Generating a Transaction

  • Go to the Send tab
  • Enter the receiving wallet address to create and sign a transaction between the two test wallets. Then, specify the amount of test ADA to send.
  • Enter your spending password and click Sign.

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4. Submit the Transaction

Option 1
  • Click Submit to hit the Turbo Transaction endpoint via Eternl.
Option 2 Click Download(signed)
  • Copy the cBorHex from the downloaded transaction file. In this example, that will be: 
    > 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
  • Run the following command to create a binary stream: 
    > TRANSACTION=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

> xxd -r -p <<< ${TRANSACTION} > tx.signed.cbor.preprod
  • Use your project API key to submit the transaction to the Maestro endpoint: /txmanager/turbosubmit 
    > curl -X POST -H "Content-Type: application/cbor" -H "api-key: <project_api_key>" --data-binary @tx.signed.cbor.preprod https://preprod.gomaestro-api.org/v1/txmanager/turbosubmit
The response is the transaction hash of the submitted transaction.