Cooperative Exit to L1

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Prerequisites

• A funded Spark wallet
• A Bitcoin address to receive funds
• Understanding of Bitcoin transaction fees

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Withdraw

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Understanding Cooperative Exits

A cooperative exit involves coordination between your wallet and the SSP to process your withdrawal efficiently. This is the preferred method because:

• Lower fees than unilateral exits
• It’s faster
• No timelocks

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Initiating the Withdraw

const withdraw_result = await wallet.withdraw({
  onchainAddress:
    "bcrt1pf8hed85p94emupfpfhq2g0p5c40cgzqs4agvvfmeuy32nxeh549syu2lwf",
  targetAmountSats: 17000,
});
console.log("Withdraw Result:", withdraw_result);

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Fee Considerations

• Network fees are required for the Bitcoin transaction and they will be deducted from the targetAmountSats
• The total cost will include:
  • Bitcoin network fee
  • Spark service fee (if applicable, charged by the SSP)
  • Example: If you are setting targetAmountSats to 10,000 sats, the bitcoin fees are 2000 sats, and the SSP fees are 1000 sats, you will receive 7000 sats at your L1 address.

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Best Practices

• Keep your withdrawal address secure
• Verify the withdrawal address before confirming
• Keep track of your exit transaction ID
• Wait for sufficient confirmations

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Common Issues

• Network congestion delays
• Address format issues
• Insufficient balance for fees

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Next Steps

If cooperative exit isn’t possible, you can:

• Try a unilateral exit (coming soon)
• Review the API Reference for advanced options

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Need Help?

• Check our FAQ
• Review the API Reference
• Follow our Testing Guide