Solution for Python Challenge 3 #72
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feat: Add asset opt-in transaction to ASA vault's opt_in_to_asset method - Implemented an inner transaction for asset opt-in using itxn.AssetTransfer - Ensured zero-asset transfer to self for opt-in process, with asset close for cleanup - Set transaction fee to zero for the opt-in operation
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🎉 Congrats on solving the 3rd Algorand Python Coding Challenge! I have labeled your PR approved, so you can now claim your certificate. You can claim your certificate of completion NFT here: |
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1. What was the problem?
The primary issue was that the
opt_in_to_assetmethod in the ASA vault smart contract did not perform the actual opt-in transaction necessary for the contract to hold and manage the specified ASA (Algorand Standard Asset). Although the method was designed to facilitate the contract's opt-in to an asset, it lacked the execution of a transaction that would officially register the smart contract with the Algorand network as capable of receiving and holding the asset. This was a crucial step because, without it, any attempts to deposit the ASA into the vault would fail, as the contract would not be recognized as an opted-in account for the specified asset.2. How did you solve the problem?
To resolve this issue, I added an inner transaction (
itxn.AssetTransfer) within theopt_in_to_assetmethod. This transaction was configured to send an asset transfer of zero units of the ASA to the contract itself, which is the standard procedure on the Algorand network to opt-in to an ASA. This effectively registers the contract as capable of holding the asset. Additionally, I set the asset transfer to close back to the creator's address with a zero fee. This ensures that the opt-in operation is cost-effective and that the contract maintains minimum balance requirements without holding unnecessary assets. By implementing this transaction, the smart contract is now fully equipped to accept and manage the ASA as intended.3. Screenshot of your terminal showing the result of running the deploy script.