Summary

Use safemint instead of _mint for ERC721

Vulnerability Details

Whenever a stream is created, the receipient of the stream is minted an NFT. The issue here is that some contracts does not support ERC721 and given such a cases, the minted NFT will be frozen in the contract and cannot be used.

Impact

Users/ Recipients will lose their stream NFTs. (and if need arises for them to sell they cant be able to do so)

Tools Used

Manual Review

Recommendations

Use safemint instead of mint to assert if the recipient contract can handle the NFTs.