fix (fungible-token): add contract-caller as allowed sender #21
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MarvinJanssen
approved these changes
Feb 26, 2024
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Hi @friedger, this is great! My apologies for the delay in getting this merged. Would you mind resolving the conflict in |
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I resolved conflicts and merged the changes here: #28 Thanks for your contribution! 🙏 |
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This PR changes the fungible-token.clar contract. It
Reasoning:
Currently, a defi contract would need to use
(as-contract (contract-call? token transfer...))if the defi contract wants to transfer own tokens. This is dangerous because it changes the sender context to the contract itself and gives the token contract access to all assets owned by the contract.It is more secure to allow the defi contract to transfer the token as
contract-caller. With this PR, an example defi.clar contract was added that allows to release tokens from the contract by any user. The user can transfer only the token itself, no other tokens might be transferred. This enables AMM without whitelisting contracts.